一、作業(yè)前準(zhǔn)備與整機(jī)檢查

（一）安全與環(huán)境檢查

1. 清理操作區(qū)域雜物，預(yù)留 1 米以上安全操作空間，確保進(jìn)料口、濾液出口、卸料區(qū)無(wú)堵塞。
2. 檢查電氣系統(tǒng)：電源連接牢固、接地可靠，電控箱密封完好無(wú)積水，急停按鈕靈敏有效；冬季作業(yè)需空載預(yù)熱液壓站 10-15 分鐘，待油溫升至 15℃以上再啟動(dòng)。
3. 檢查液壓系統(tǒng)：確認(rèn)液壓油位在刻度線中間位置，油質(zhì)無(wú)乳化、無(wú)雜質(zhì)；液壓管路無(wú)泄漏、接頭無(wú)松動(dòng)，壓力表量程匹配且校驗(yàn)合格。

（二）核心部件檢查

1. 濾板與濾布：核對(duì)濾板數(shù)量與型號(hào)，排列整齊無(wú)錯(cuò)位，密封面無(wú)劃痕、無(wú)物料殘留；濾布安裝平整無(wú)褶皺、無(wú)破損，邊緣密封嚴(yán)實(shí)，濾布孔徑需與物料顆粒匹配，避免漏料。
2. 隔膜系統(tǒng)：檢查隔膜濾板充氣 / 充液通道通暢，壓榨閥門(mén)開(kāi)關(guān)靈活，無(wú)漏氣、漏液現(xiàn)象。
3. 拉板系統(tǒng)：自動(dòng)拉板小車(chē)運(yùn)行順暢，拉爪無(wú)磨損變形；手動(dòng)拉板需確認(rèn)手柄牢固，兩側(cè)施力均勻。

二、核心操作流程

（一）濾板壓緊

1. 啟動(dòng)液壓站，按下 “壓緊” 按鈕，驅(qū)動(dòng)壓緊板緩慢移動(dòng)，逐步貼合濾板組。
2. 觀察壓力表，當(dāng)油壓達(dá)到設(shè)備額定壓緊壓力（通常 0.8-1.5MPa，嚴(yán)禁超壓）時(shí)，切換至 “保壓” 模式，確保濾室密封嚴(yán)密，無(wú)物料泄漏風(fēng)險(xiǎn)。
3. 嚴(yán)禁在濾板未完全壓緊、保壓未到位時(shí)啟動(dòng)進(jìn)料，避免物料噴濺、濾板移位損壞。

（二）藥劑調(diào)配（針對(duì)污泥 / 細(xì)顆粒物料）

1. 向 2 噸藥劑桶注入清水，開(kāi)啟攪拌電機(jī)，按 “少量多次” 原則投加 PAM 絮凝劑（常規(guī)配比約 10 斤藥劑 / 2 噸水），持續(xù)攪拌至藥劑完全溶解。
2. 觀察藥劑溶液狀態(tài)，確認(rèn)無(wú)結(jié)塊、無(wú)分層，與水充分混合后備用；攪拌電機(jī)需全程開(kāi)啟，直至藥劑投加完成。

（三）物料絮凝預(yù)處理

1. 開(kāi)啟污泥泵向 5 噸沉淀罐送料，同時(shí)開(kāi)啟沉淀罐攪拌電機(jī)，啟動(dòng)藥劑加藥泵，將調(diào)配好的藥劑水緩慢注入罐中。
2. 觀察物料絮凝狀態(tài)，少量多次投加藥劑水，直至料漿中出現(xiàn)明顯小絮花、固液分離清晰后，關(guān)閉加藥泵與沉淀罐攪拌電機(jī)；物料濃度越高，藥劑量需相應(yīng)增加，反之則減少。

（四）進(jìn)料過(guò)濾

1. 開(kāi)啟進(jìn)料泵，先將進(jìn)料閥調(diào)至 1/3 開(kāi)度，小流量向壓濾機(jī)送料，從第一個(gè)水龍頭開(kāi)始逐步打通管路，待濾布均勻掛料后，緩慢加大進(jìn)料流量。
2. 控制進(jìn)料壓力在 0.4-0.6MPa（嚴(yán)禁超 0.45MPa），實(shí)時(shí)觀察沉淀罐料位，料位不足時(shí)及時(shí)關(guān)停進(jìn)料泵，避免空轉(zhuǎn)損壞設(shè)備。
3. 監(jiān)控濾液澄清度，若濾液渾濁，立即停機(jī)檢查濾布是否破損；若壓力驟升，說(shuō)明濾布堵塞，需及時(shí)清理或更換。

（五）隔膜壓榨

1. 進(jìn)料完成后，關(guān)閉進(jìn)料泵與進(jìn)料閥，啟動(dòng)二次壓榨泵，向隔膜濾板通入壓榨介質(zhì)（壓縮空氣或高壓水）。
2. 控制升壓速度≤0.1MPa/min，壓榨壓力比進(jìn)料壓力高 0.2-0.5MPa，保壓脫水 40 分鐘 – 1 小時(shí)，期間觀察水流量，直至出液量顯著減少。
3. 打開(kāi)回流閥門(mén)，將隔膜腔余水全部回流至清水罐，保壓 10 分鐘后關(guān)閉閥門(mén)，完成壓榨工序；嚴(yán)禁瞬間泄壓，避免濾板回彈變形。

（六）卸餅操作

1. 將操作箱切換至 “自動(dòng)” 模式，按下 “松開(kāi)” 按鈕，使壓緊板退回至限位位置，完全松開(kāi)濾板。
2. 啟動(dòng)自動(dòng)拉板裝置，小車(chē)逐塊拉開(kāi)濾板，濾餅靠自重落入集料斗，直至拉完最后一塊板后，復(fù)位壓緊壓濾機(jī)，進(jìn)入下一個(gè)循環(huán)。
3. 若濾餅粘連濾板，需用木鏟、塑料鏟等軟質(zhì)工具輕輕剝離，嚴(yán)禁用金屬工具刮擦濾板密封面，避免劃傷影響密封效果；操作時(shí)嚴(yán)禁將頭、手伸入濾板間隙，防止夾傷。

三、日常保養(yǎng)與維護(hù)

1. 潤(rùn)滑保養(yǎng)：沉淀罐攪拌電機(jī)、藥劑桶攪拌電機(jī)每月加注一次潤(rùn)滑油；拉板小車(chē)導(dǎo)軌、軸承等運(yùn)動(dòng)部件每周加注潤(rùn)滑脂，確保運(yùn)行順暢。
2. 液壓系統(tǒng)維護(hù)：液壓油每半年至一年更換一次，補(bǔ)充至規(guī)定油位；定期清洗油箱濾芯，檢查油缸密封圈，及時(shí)更換老化密封件，避免漏油。
3. 濾布與濾板清潔：每次卸餅后，徹底清理濾布、濾板上的殘留物料，確保濾布孔隙通暢、濾板密封面干凈；濾布堵塞時(shí)，用高壓水反沖清洗，破損面積超 5cm2 需立即更換。
4. 設(shè)備清潔：及時(shí)清理小車(chē)軌道上的雜物，避免卡阻；用清水沖洗進(jìn)料管、出液管，防止物料殘留硬化堵塞管路。
5. 長(zhǎng)期停機(jī)保養(yǎng)：排空設(shè)備內(nèi)殘留液體，給濾板涂防銹油，濾布清洗晾干后封存，用防雨布覆蓋整機(jī)，避免日曬雨淋、銹蝕損壞。

四、安全操作注意事項(xiàng)

1. 嚴(yán)禁超壓、超溫運(yùn)行，過(guò)濾壓力不得超過(guò) 0.45MPa，物料溫度不得超過(guò) 80℃，防止濾板變形、爆裂。
2. 設(shè)備運(yùn)行時(shí)，不得進(jìn)行濾板拆卸、維修、清理作業(yè)；出現(xiàn)異常異響、漏油、濾板破裂等情況，需立即按下急停按鈕，先泄壓再排查故障。
3. 操作人員需經(jīng)專(zhuān)業(yè)培訓(xùn)上崗，佩戴防護(hù)手套、護(hù)目鏡等勞保用品，規(guī)范操作流程，杜絕違規(guī)作業(yè)。
4. 定期檢查安全防護(hù)裝置，確保液壓系統(tǒng)安全閥、電控箱漏電保護(hù)器等靈敏有效，保障生產(chǎn)安全。

在現(xiàn)代污水處理與工業(yè)污泥處理中，污泥脫水是實(shí)現(xiàn)減量化、穩(wěn)定化的核心環(huán)節(jié)。Plate and frame filter press憑借脫水效果好、處理能力強(qiáng)、運(yùn)行穩(wěn)定等優(yōu)勢(shì)，已成為市政污水、鋼鐵冶金、化工等領(lǐng)域的主流設(shè)備。蘇東壓濾機(jī)專(zhuān)注于高效污泥脫水解決方案，為企業(yè)提供定制化選型與設(shè)計(jì)服務(wù)，助力節(jié)能降耗、降本增效。

核心原理與技術(shù)優(yōu)勢(shì)

板框壓濾機(jī)通過(guò)機(jī)械擠壓與過(guò)濾介質(zhì)雙重作用實(shí)現(xiàn)固液分離，完整流程涵蓋進(jìn)料過(guò)濾、壓榨脫水、吹氣干燥、卸料四大階段。現(xiàn)代機(jī)型普遍采用隔膜壓濾技術(shù)，在濾板內(nèi)嵌入彈性隔膜，通過(guò)高壓水或壓縮空氣實(shí)現(xiàn)二次壓榨，脫水效率提升 30% 以上，出泥含水率可低至 60%–80%，顯著優(yōu)于傳統(tǒng)設(shè)備。

根據(jù)壓榨壓力不同，隔膜壓濾機(jī)分為低壓型（1.0–1.6MPa）與高壓型（1.6–2.5MPa），可適配初沉污泥、化學(xué)污泥等不同特性物料，滿(mǎn)足多樣化處理需求。

選型設(shè)計(jì)關(guān)鍵要點(diǎn)

1. 核心參數(shù)選型

• filtration area：根據(jù)污泥產(chǎn)量、脫水周期確定，范圍從幾平方米到上千平方米，大型項(xiàng)目推薦多臺(tái)并聯(lián)運(yùn)行，保障處理能力與系統(tǒng)靈活性。
• Filter plate material：采用增強(qiáng)聚丙烯材料，耐腐蝕、重量輕、使用壽命長(zhǎng)；常見(jiàn)規(guī)格 800×800mm 至 1250×1250mm，適配不同安裝空間與操作需求。
• 輔助系統(tǒng)：配套濾布選型、水洗裝置、接液盤(pán)等，直接影響設(shè)備長(zhǎng)期穩(wěn)定運(yùn)行。

2. 工藝與運(yùn)行控制

預(yù)處理是關(guān)鍵：壓濾機(jī)前設(shè)置污泥濃縮池（停留時(shí)間≥48 小時(shí)），化學(xué)污泥需增設(shè)儲(chǔ)池（6–8 小時(shí)），穩(wěn)定進(jìn)泥濃度與性質(zhì)。

運(yùn)行參數(shù)精準(zhǔn)控制：進(jìn)料壓力 1.2MPa，壓榨壓力 1.6–2.0MPa，壓榨用水溫度 15–40℃，完整脫水周期 5–6 小時(shí)，保障脫水效果與設(shè)備壽命。

操作維護(hù)與安全保障

規(guī)范操作流程：先壓緊濾板，再進(jìn)料 30–60 分鐘，隨后壓榨保壓 120–180 分鐘，確保充分脫水。日常維護(hù)需定期檢查濾布、清理排水槽，每 20–30 個(gè)周期清洗濾布，長(zhǎng)期停用前清除污泥并做防腐處理。

安全方面嚴(yán)格遵循壓力容器規(guī)范，嚴(yán)禁帶壓檢修，安全附件定期校驗(yàn)，操作人員經(jīng)專(zhuān)業(yè)培訓(xùn)，異常情況立即停機(jī)排查，保障生產(chǎn)安全。

技術(shù)趨勢(shì)與蘇東方案

板框壓濾機(jī)向智能化、模塊化發(fā)展，集成在線監(jiān)測(cè)與智能算法，實(shí)現(xiàn)精準(zhǔn)控制；針對(duì)含油污泥、危廢污泥的專(zhuān)用機(jī)型不斷涌現(xiàn)。蘇東壓濾機(jī)提供全自動(dòng)控制、變頻節(jié)能等創(chuàng)新方案，能耗降低 30% 以上，為鋼鐵廠、污水處理廠等客戶(hù)提供高效、經(jīng)濟(jì)的污泥脫水解決方案，助力企業(yè)實(shí)現(xiàn)綠色生產(chǎn)與可持續(xù)發(fā)展。

蘇東壓濾機(jī)選型咨詢(xún)：18851718517

板框過(guò)濾布目數(shù)選擇與微米對(duì)照說(shuō)明

板框過(guò)濾布廣泛應(yīng)用于：
? 鎳精礦
? 銅精礦
? 污泥脫水
? 冶金行業(yè)
? 化工行業(yè)

在實(shí)際選型過(guò)程中，客戶(hù)普遍習(xí)慣使用“目數(shù)”作為過(guò)濾精度的判斷依據(jù)。

一、什么是目數(shù)（Mesh）？

**目數(shù)（Mesh）**是指：

每英寸（25.4mm）長(zhǎng)度內(nèi)的孔數(shù)

目數(shù)與過(guò)濾精度關(guān)系如下：
? 目數(shù)越大 → 孔徑越小 → 過(guò)濾越精細(xì)
? 目數(shù)越小 → 孔徑越大 → 過(guò)濾通透性越強(qiáng)

二、常見(jiàn)目數(shù)與微米對(duì)照參考

根據(jù)行業(yè)通用篩網(wǎng)目數(shù)—微米對(duì)照表，部分常用參數(shù)如下：

目數(shù)（Mesh） 孔徑（μm）
60目 246μm
80目 198μm
100目 165μm
110目 150μm
180目 83μm
200目 74μm
250目 61μm
270目 53μm
325目 47μm
425目 33μm
500目 25μm
625目 20μm
800目 15μm

可以看到：
? 100目 ≈ 165微米（中等過(guò)濾）
? 200目 ≈ 74微米（精細(xì)過(guò)濾）
? 500目 ≈ 25微米（高精度過(guò)濾）
? 800目 ≈ 15微米（超精細(xì)過(guò)濾）

在板框壓濾應(yīng)用中，常見(jiàn)目數(shù)一般在 100目—800目 之間。

三、不同工況如何選擇目數(shù)？

目數(shù)選擇需要結(jié)合以下因素：

1?? 物料粒徑
? 粗顆粒 → 100–150目
? 中等顆粒 → 150–300目
? 細(xì)顆粒或高要求 → 300目以上

2?? 過(guò)濾速度要求
? 追求通量 → 低目數(shù)
? 追求清液清澈度 → 高目數(shù)

3?? 濾餅含水率要求
? 高壓脫水工況 → 建議中高目數(shù)配合合理織造結(jié)構(gòu)

4?? 行業(yè)參考

行業(yè) 常見(jiàn)目數(shù)區(qū)間
銅/鎳精礦 150–300目
污泥脫水 100–200目
化工精細(xì)過(guò)濾 300–500目

（具體仍需根據(jù)物料粒徑分布測(cè)試確定）

四、常見(jiàn)板框過(guò)濾布型號(hào)

常見(jiàn)型號(hào)包括：
? 丙綸750系列（750A / 750B / 750AB）
? 丙綸108C
? 丙綸840AB
? 滌綸621
? 滌綸3927
? 錦綸6533

不同材質(zhì)區(qū)別：

材質(zhì) 特點(diǎn)
丙綸 耐酸堿、性?xún)r(jià)比高
滌綸 強(qiáng)度高、耐磨
錦綸 彈性好、耐沖擊

五、丙綸濾布優(yōu)勢(shì)

蘇東壓濾機(jī)丙綸系列濾布已通過(guò)檢測(cè)認(rèn)證，符合法規(guī)多項(xiàng)檢測(cè)標(biāo)準(zhǔn)。

特別適用于：
? 大過(guò)濾面積臥式壓濾機(jī)
? 多室結(jié)構(gòu)設(shè)備
? 密封要求高的工況

可有效解決：
? 密封差
? 漏料
? 濾布變形

并具備：
? 供貨穩(wěn)定
? 專(zhuān)業(yè)硫化技術(shù)團(tuán)隊(duì)支持
? 高性?xún)r(jià)比

六、選型核心建議

目數(shù) ≠ 唯一標(biāo)準(zhǔn)

板框過(guò)濾布選型應(yīng)綜合：
? 目數(shù)（微米）
? 織造結(jié)構(gòu)
? 單絲/復(fù)絲結(jié)構(gòu)
? 克重
? 厚度
? 透氣量
? 設(shè)備壓力

真正實(shí)現(xiàn)：

濾布與設(shè)備的完美匹配

蘇東壓濾機(jī)濾布

? 1. 先明確尾渣的基本參數(shù)

建議先做污泥化驗(yàn)（最好是實(shí)驗(yàn)室過(guò)濾測(cè)試）：

參數(shù) 意義

固體含量（%） 決定濾布選擇及預(yù)處理需求

顆粒粒徑分布

影響過(guò)濾通量

泥漿黏度

影響泵送與脫水效果

濾餅干燥性

關(guān)乎出渣含水率

是否含纖維長(zhǎng)鏈

長(zhǎng)纖維可能纏繞濾布

若暫時(shí)無(wú)法化驗(yàn)，可用歷史運(yùn)行數(shù)據(jù)或在線濁度、固含量估算。

? 2. 根據(jù)產(chǎn)量確定規(guī)格與處理能力

造紙行業(yè)尾渣量大且用量不穩(wěn)定，通常按日處理量或小時(shí)平均計(jì)算：

? 日處理量（噸/天）

? 設(shè)計(jì)流量（m3/h 或 t/h）

? 峰值負(fù)荷余量（建議 10–30%）

確定參數(shù)后選擇壓濾機(jī)規(guī)格：

日處理量 推薦壓濾機(jī)規(guī)格

<10 t/d 400–800 型

10–30 t/d 800–1200 型

>30 t/d 1200–1500 或更大

型號(hào)一般按板寬（mm）+板數(shù)設(shè)計(jì)，如 800×800 / 1000×1000 / 1200×1200 / 1500×1500。

? 3. 選壓濾機(jī)板框類(lèi)型

造紙尾渣壓濾機(jī)常用以下結(jié)構(gòu)：

? (1) 板框式壓濾機(jī)

? 優(yōu)點(diǎn)：結(jié)構(gòu)簡(jiǎn)單、設(shè)備投資低

? 缺點(diǎn)：占地大、自動(dòng)化程度低

? 適合：產(chǎn)量小、資金受限

? (2) 壓縮式（楔形 / 壓榨式）壓濾機(jī)

? 有機(jī)械壓榨輔助壓濾

? 脫水效果好、濾餅更干

? (3) 自動(dòng)快開(kāi)式壓濾機(jī)（頂裝 / 邊裝）

? 自動(dòng)開(kāi)閉、濾布自動(dòng)清洗

? 適合高頻開(kāi)閉的場(chǎng)景

對(duì)于造紙尾渣常選 自動(dòng)快開(kāi) + 壓縮型壓濾機(jī)，出渣含水率較低，易于運(yùn)輸與后續(xù)處理。

? 4. 濾布選擇（對(duì)脫水效果關(guān)鍵）

尾渣富含長(zhǎng)纖維、易堵布，因此：

?? 材質(zhì)推薦：

? PET / PPS / PA（耐磨、耐高溫、耐堿）

? 單層或雙層復(fù)合濾布

? 較粗濾孔，有利于纖維通過(guò)（減少堵布）

?? 結(jié)構(gòu)形式：

? 方格紋 / 網(wǎng)狀紋理 → 抗堵性能好

? 過(guò)濾速度快、易清洗

?? 濾布清洗方式：

? 高頻反沖洗

? 高壓水槍自動(dòng)清洗

? 濾布更換便捷

? 5. 預(yù)處理設(shè)計(jì)

為了提高壓濾效果，一般需要配合預(yù)處理：

? (1) 化學(xué)絮凝

? 投加聚丙烯酰胺（PAM）

? 投加無(wú)機(jī)絮凝劑（如 PAC、硫酸鋁）

目的：

? 粒子聚團(tuán) → 形成易濾性絮凝體

? 降低濾餅含水率

? 提高過(guò)濾通量

需要實(shí)驗(yàn)室或現(xiàn)場(chǎng)試劑調(diào)試最佳投加量。

? 6. 驅(qū)動(dòng)與自動(dòng)化控制

建議配置：

? 變頻驅(qū)動(dòng)推進(jìn)

? 自動(dòng)開(kāi)閉控制系統(tǒng)

? 壓力 / 液位 / 流量監(jiān)控

自動(dòng)化可顯著提升：

? 運(yùn)行穩(wěn)定性

? 操作安全性

? 人力成本減少

? 7. 后端排渣與運(yùn)輸

根據(jù)脫水后的濾餅用途或處理方式：

? 低含水率 → 可燃燒 / 堆肥 / 回用

? 中含水率 → 堆放、再干燥

? 高含水率 → 需進(jìn)一步干燥

需預(yù)留：

?? 皮帶輸送機(jī)或刮板輸送

?? 濾餅集料箱

?? 污泥泵與泵房

? 8. 現(xiàn)場(chǎng)條件約束

在選型時(shí)還要考慮：

? 建筑高度 / 吊裝空間

? 電力供應(yīng)

? 污泥泵揚(yáng)程與管路

? 排水條件

?? 實(shí)例選型（參考）

序號(hào) 日處理量 污泥特點(diǎn) 推薦機(jī)型

1 15 t/d 中等固含量尾渣 1000×1000 自動(dòng)壓榨式

2 40 t/d 高纖維、高黏度 1200×1200 全自動(dòng)壓濾機(jī)

3 5 t/d 低量試運(yùn)行 800×800 板框式

?? 選型流程建議

1. 化驗(yàn)尾渣（固含量、濾速、黏度）

2. 做小試或現(xiàn)場(chǎng)試驗(yàn)（絮凝劑篩選 + 壓濾測(cè)試）

3. 估算處理量 + 設(shè)計(jì)冗余

4. 確定主機(jī)型號(hào) + 驅(qū)動(dòng) + 控制

5. 配置絮凝系統(tǒng) + 輸送系統(tǒng) + 自動(dòng)化

如果你愿意提供 尾渣具體化驗(yàn)數(shù)據(jù) / 日處理量 / 現(xiàn)場(chǎng)照片或流程圖，我可以幫你做進(jìn)一步的 精確機(jī)型配置與報(bào)價(jià)建議。

報(bào)價(jià)咨詢(xún)：18851718517

在壓濾機(jī)設(shè)備中，filter plate是決定過(guò)濾效果和設(shè)備穩(wěn)定性的核心部件之一。濾板質(zhì)量的高低，直接影響過(guò)濾效率、濾餅含水率以及設(shè)備的使用壽命。蘇東壓濾機(jī)濾板作為壓濾機(jī)關(guān)鍵配套產(chǎn)品，憑借合理的結(jié)構(gòu)設(shè)計(jì)、穩(wěn)定的性能表現(xiàn)和良好的適應(yīng)性，被廣泛應(yīng)用于多個(gè)行業(yè)的固液分離工況中。

一、蘇東壓濾機(jī)濾板的結(jié)構(gòu)特點(diǎn)

蘇東壓濾機(jī)濾板在設(shè)計(jì)上充分考慮了過(guò)濾效率與密封性能的平衡。濾板表面溝槽分布均勻，有利于濾液快速排出，減少過(guò)濾阻力，提高整體過(guò)濾速度。邊框密封面平整度高，在壓緊狀態(tài)下能夠有效防止跑料、漏料現(xiàn)象的發(fā)生。

濾板整體結(jié)構(gòu)強(qiáng)度高，受壓均勻，在長(zhǎng)期高壓過(guò)濾環(huán)境下不易變形，為壓濾機(jī)穩(wěn)定運(yùn)行提供可靠保障。

二、濾板材質(zhì)與性能優(yōu)勢(shì)

蘇東壓濾機(jī)濾板通常采用高強(qiáng)度聚丙烯等材料制成，具有良好的耐壓性、耐腐蝕性和耐磨性，適用于多種復(fù)雜工況。針對(duì)化工、環(huán)保等對(duì)耐腐蝕要求較高的行業(yè)，濾板在材料配比和成型工藝上進(jìn)行了優(yōu)化，能夠有效延長(zhǎng)使用壽命。

同時(shí)，濾板表面光滑，濾餅易于脫落，有助于提高卸料效率，減少人工清理時(shí)間。

三、濾板規(guī)格齊全，支持定制

為滿(mǎn)足不同行業(yè)和不同處理量的需求，蘇東壓濾機(jī)濾板規(guī)格齊全，可匹配多種型號(hào)壓濾機(jī)使用。過(guò)濾面積、板框尺寸、進(jìn)料方式均可根據(jù)客戶(hù)實(shí)際工況進(jìn)行合理配置。

對(duì)于特殊物料或特殊工藝要求，蘇東壓濾機(jī)濾板還可提供定制化方案，在濾板厚度、進(jìn)料孔位置及密封結(jié)構(gòu)等方面進(jìn)行針對(duì)性設(shè)計(jì)，更好地滿(mǎn)足現(xiàn)場(chǎng)使用需求。

四、廣泛的應(yīng)用領(lǐng)域

蘇東壓濾機(jī)濾板已廣泛應(yīng)用于污水處理、污泥脫水、化工過(guò)濾、礦山選礦、食品加工等多個(gè)領(lǐng)域。在環(huán)保行業(yè)中，濾板能夠有效降低污泥含水率；在化工行業(yè)中，可滿(mǎn)足對(duì)耐腐蝕和密封性能的高要求；在礦山行業(yè)中，濾板結(jié)構(gòu)堅(jiān)固，適合高壓、大處理量工況。

五、質(zhì)量控制與使用保障

蘇東壓濾機(jī)濾板在生產(chǎn)過(guò)程中實(shí)行嚴(yán)格的質(zhì)量控制，從原材料選擇、模壓成型到成品檢測(cè)，每一道工序均經(jīng)過(guò)嚴(yán)格把關(guān)。出廠前對(duì)濾板進(jìn)行耐壓、密封和外觀檢測(cè)，確保產(chǎn)品性能穩(wěn)定可靠。

同時(shí)，廠家可為客戶(hù)提供濾板選型建議和使用指導(dǎo)，幫助客戶(hù)延長(zhǎng)濾板使用周期，降低維護(hù)成本。

六、持續(xù)優(yōu)化與技術(shù)提升

隨著壓濾技術(shù)的發(fā)展，蘇東壓濾機(jī)濾板在結(jié)構(gòu)設(shè)計(jì)和材料工藝方面不斷優(yōu)化升級(jí)，在保證強(qiáng)度的同時(shí)，進(jìn)一步提升過(guò)濾效率和耐用性，為企業(yè)生產(chǎn)提供更高效的支持。

concluding remarks

總體來(lái)看，蘇東壓濾機(jī)濾板憑借穩(wěn)定的質(zhì)量、合理的結(jié)構(gòu)設(shè)計(jì)和良好的應(yīng)用表現(xiàn)，已成為壓濾機(jī)配件中的重要選擇。無(wú)論是新設(shè)備配套，還是舊設(shè)備更換濾板，蘇東壓濾機(jī)濾板都能為用戶(hù)提供可靠的過(guò)濾保障。

在工業(yè)生產(chǎn)中，高效過(guò)濾是提升產(chǎn)能、降低成本的關(guān)鍵環(huán)節(jié)。蘇東壓濾機(jī)憑借先進(jìn)工藝與匠心品質(zhì)，為各行業(yè)提供穩(wěn)定、耐用、智能化的過(guò)濾解決方案，助力企業(yè)實(shí)現(xiàn)綠色高效生產(chǎn)！

為什么選擇蘇東壓濾機(jī)？

??卓越性能——采用高強(qiáng)度聚丙烯濾板，耐腐蝕、抗變形，過(guò)濾效率提升40%，確保長(zhǎng)期穩(wěn)定運(yùn)行。
??節(jié)能降耗——優(yōu)化液壓系統(tǒng)，能耗降低35%，運(yùn)行成本更低，符合現(xiàn)代企業(yè)節(jié)能需求。
??智能控制——配備全自動(dòng)PLC控制系統(tǒng)，支持遠(yuǎn)程監(jiān)控、故障報(bào)警，操作更便捷，減少人工干預(yù)。
??廣泛適用——適用于礦山尾礦、化工污泥、食品發(fā)酵、環(huán)保污水處理等領(lǐng)域，滿(mǎn)足不同工況需求。
??定制服務(wù)——根據(jù)客戶(hù)實(shí)際需求，提供濾板材質(zhì)、過(guò)濾面積、自動(dòng)化程度等個(gè)性化配置，精準(zhǔn)匹配生產(chǎn)要求。

蘇東壓濾機(jī)，助您輕松應(yīng)對(duì)嚴(yán)苛過(guò)濾挑戰(zhàn)！

無(wú)論是高粘度物料，還是高精度過(guò)濾，蘇東壓濾機(jī)都能以更低的能耗、更高的效率完成任務(wù)，讓生產(chǎn)更順暢，成本更可控！

立即聯(lián)系蘇東壓濾機(jī)廠家，獲取專(zhuān)屬技術(shù)方案！

核心關(guān)鍵詞：蘇東壓濾機(jī)、高效壓濾機(jī)、固液分離設(shè)備、工業(yè)過(guò)濾機(jī)、智能壓濾機(jī)廠家、污泥脫水設(shè)備、化工壓濾機(jī)

隨著環(huán)保政策持續(xù)加碼，越來(lái)越多的企業(yè)開(kāi)始關(guān)注過(guò)濾設(shè)備的品質(zhì)與效率。在眾多壓濾機(jī)品牌中，蘇東壓濾機(jī)以穩(wěn)定性能、合理價(jià)格和定制能力脫穎而出，成為各行業(yè)用戶(hù)優(yōu)選的固液分離設(shè)備之一。

蘇東壓濾機(jī)產(chǎn)品涵蓋板框式、隔膜式、全自動(dòng)、手動(dòng)壓濾機(jī)等多個(gè)系列，廣泛應(yīng)用于污水處理、制藥、食品、選礦、化工、冶金等領(lǐng)域。無(wú)論您是初創(chuàng)企業(yè)，還是大型工程項(xiàng)目，蘇東都能根據(jù)實(shí)際工況提供合適的過(guò)濾解決方案。

為什么選擇蘇東壓濾機(jī)？

1. 源頭直供，品質(zhì)可控：所有壓濾機(jī)均由本地實(shí)力廠家生產(chǎn)，嚴(yán)控每一道工藝，保障設(shè)備質(zhì)量。

2. 技術(shù)成熟，維護(hù)方便：采用加厚濾板、智能液壓系統(tǒng)，降低故障率，便于日常保養(yǎng)。

3. 支持定制，按需選型：提供非標(biāo)壓濾機(jī)定制服務(wù)，適配特殊場(chǎng)景或復(fù)雜工藝要求。

4. 售后無(wú)憂，服務(wù)到位：蘇東配有專(zhuān)業(yè)技術(shù)團(tuán)隊(duì)，提供現(xiàn)場(chǎng)安裝、調(diào)試、培訓(xùn)等一體化服務(wù)。

越來(lái)越多用戶(hù)在百度搜索“蘇東壓濾機(jī)”時(shí)，不只是為了了解產(chǎn)品，更是為了找到一個(gè)可靠的合作伙伴。選擇蘇東，就是選擇一個(gè)重視品質(zhì)、服務(wù)和效率的品牌。

Lithium has a low melting point, high boiling point, most negative potential, light mass, etc.,It is widely used in new energy vehicles, nuclear industry, aviation, medical, and other fields. Lithium is the most important basic raw material for new energy industry.,be known as "21New Energy for the Century". In order to accelerate the realisation of the strategic goal of "Carbon Neutral, Carbon Peak".,China has vigorously developed the lithium new energy industry,Demand for lithium feedstock is increasing year on year,Lithium's growing strategic position,A new round of competition for mineral resources has been launched[. Currently,The main sources of domestic lithium resources are salt lake lithium and ore lithium. Ore lithium mainly includes lithium pyroxene, lithium mica, lithium feldspar, lithium iron mica, lithium muscovite, lithium aluminium phosphorite, etc.. To ensure stable market supply of lithium raw materials,Lithium extraction from lithium mica,Has become an important way to obtain lithium feedstock,Yichun area in Jiangxi has the world's largest associated lithium mica mine[12]. During the beneficiation of lithium mica,Belt filters are commonly used in the dewatering of lithium mica concentrates.,Concentrate moisture is generally greater than18%,There are features such as high moisture of lithium mica concentrate, large equipment footprint and low processing efficiency. A mineral processing plant in Yichun area adopts a company's production ofFFPDewatering of lithium mica concentrate by horizontal quick opening filter presses,It has the characteristics of small equipment footprint, high processing efficiency and low moisture of lithium mica concentrate.,at the same time,It can reduce the transport cost of lithium mica concentrate and the drying cost of downstream lithium carbonate plant. This paper focuses onEffect of filter cloth type, cycle time, working pressure, type of filter aid, and dosage of filter aid in lithium mica concentrate on the moisture of lithium mica concentrate in a fast-opening filter press.

1The test specimens were taken from a lithium mica concentrate of a mineral processing plant in Yichun area.,The results of multi-element chemical analyses of this lithium mica concentrate and the results of sieve analyses of the lithium mica concentrate are shown in Table1wristwatches2The From the table1wristwatches2knowable,This lithium mica concentrateLi2Oquantity contained1.71%,Al2O3quantity contained29.34%,SiO2quantity contained47.60%. Lithium mica concentrate particle size<75μmContent as a percentage of32.79%,<25μmContent as a percentage of14.63%,The dewatering process is difficult and the concentrate moisture is high when using traditional belt filter dewatering.2FFPHorizontal quick-opening filter press introductionQuick-open horizontalFilter press is a high capacity filter press.,Mainly used for solid-liquid separation.FFPQuick-opening horizontal filter press is shown in the figure.1Shown. Operating time,The main steps are as follows.

1)infeed:The material is pumped to each filter chamber of the filter press.,Until it's completely full.

2)filtration:Rising feed pressure,Cake formation on the surface of the filter cloth,The filtrate is discharged through a collection channel.

3)squeezes:Diaphragm after extruded media enters each chamber,The diaphragm squeezes the cake between the filter cloths.,Force the filtrate through the filter cloth.

4)air dryness:Compressed air passes through the filtrate channel on the diaphragm side,Blow-dry the moisture in the filter cake to a minimum. During the drying process,The filter cake keeps the diaphragm squeezed,The filter cake can be maintained without cracking.

5)Pipe flushing, blowing:Residual slurry and water in the pipeline is cleaned and disposed of.

6)Diaphragm Release:The compressed air in the diaphragm is completely released.

7)pancake unloading:approximate30sshort time,All the filter cake is discharged at once. When the filter plate set is fully opened,The filter cloth is vibrated to ensure complete cake discharge.

8)Filter cloth rinsing:After unloading the cake,The filter cloth is flushed by a shower pipe mounted on top of the filter plate set. This ensures the removal of residual filter cake from the surface of the filter cloth.,and ensure good running conditions for the next cycle.Quick-open horizontalFilter presses have the following advantages:

1)High efficiency of equipment operation,Short technical time for opening and closing plates, etc.(<30s).

2)Weighing system installed,Measurement of the feed volume at any time,and automatically adjusts operating parameters;

3)Filter plates in accordance with European quality standards,Reliable quality, removable and replaceable edge wear parts,No need to replace the entire filter plate;

4)Automatic vibration of the filter cloth after discharging the cake,Helps to unload the cake and remove residual cake crumbs,Completely eliminates the need for manually assisted unloading,Avoid residue being trapped between the filter plates,Causes deformation of slurry or filter plates;

5)High degree of automation,the scene (of the incident)PLCcompatibility withDCSsystem connection,Observation of equipment operation status and remote start/stop can be realised in the central control room.;

6)Low running costs,Fully automatic operation of the whole plant,The site is largely unmanned,It can save more labour cost for customers.

3Results and Discussion A lithium mica concentrate from a beneficiation plant in the Yichun area was used as the object of study.,Lithium mica concentrate particle size<75μmquantity contained32.79%,Slurry concentration55%. Slurry concentration determines filter press feed time,When the slurry concentration is constant,The feed time is unchanged.

3.1Filter Press Cloth Type Condition Test Filter cloth is quite a key component in the filter press equipment.,Because of the different substances filtered by the industry,Relatively different requirements for filter cloth,This results in many types of filter cloths. In this paper, a suitable filter cloth for dewatering lithium mica concentrates is identified through industrial tests in the field.,existFFPHorizontal quick release filter press cycle time900s (Of which feed time180s.squeeze time330s.drying time360s)Work stress1MPaconstant time,To investigate the effect of different filter cloth types on the moisture of lithium mica concentrate. The test results are shown in Table3drawing2. From the table3drawing2knowable,Air permeability using nylon monofilaments300L/(m2)-min)of filter cloth lithium mica concentrate with the lowest moisture content,because of15.89%,And it was found in the test that nylon monofilament filter cloth has better peeling performance,Rapid cake stripping,The main reason for this is the high filtration accuracy and precision of nylon monofilament filter cloths.,It can filter out data with a diameter of1μmmicroparticles,This will help to prolong the use cycle of the filter cloth and improve the efficiency of the filter press.

3.2Filter press cycle time condition test Horizontal quick-opening filter press with nylon monofilament air permeability300L/(m2)-min)Filter cloth, working pressure1MPaconstant time,The effect of filter press cycle time on the moisture of lithium mica concentrate was investigated. The test results are shown in Table4drawing3. From the table4drawing3knowable,As the slurry concentration is more consistent,Then the feed and filtration times are the same,With the increase of extrusion time, drying time,Lithium mica concentrate moisture is reduced. When the total cycle time exceeds930ssurname Shi,Lithium mica concentrate moisture reduction is not significant. Taken together,Select cycle time930sOperating parameters as a filter press,At this time, the moisture of lithium mica concentrate is15.32%.

3.3Test of working pressure conditions of quick-opening filter pressesFFPHorizontal quick-open filter press with nylon monofilament air permeability300L/(m2)-min)Filter cloth, cycle time930s (where extrusion time345s.drying time375s)constant time,To investigate the effect of filter press working pressure on the moisture of lithium mica concentrate. The test results are shown in Table5drawing4. From the table5drawing4knowable,With the increased pressure of work,Lithium mica concentrate moisture reduction. When the working pressure of the filter press exceeds1.1MPasurname Shi,Slow reduction in concentrate moisture,a round-up,Determining work pressure1.1MPaOperating parameters as a filter press,At this time, the moisture of lithium mica concentrate is15%.

3.4Lithium mica concentrate filter aid type condition testcetestntrateFFPHorizontal quick-opening filter press filter cloth type, cycle time, working pressure and other equipment parameters to determine the,To investigate the effect of filter aid type and filter aid dosage on the moisture of lithium mica concentrate. The effect of filter aid type on the moisture of lithium mica concentrate was investigated first. The inorganic filter aid polymeric aluminium chloride, organic filter aid840Organic filter aids320Filter aid comparison tests were conducted. At the same dosage500g/tpresent situation,To investigate the effect of filter aid type on the moisture of lithium mica concentrate. The test results are shown in Fig.5. By Chart5knowable,At the same dosage500g/tpresent situation,When making polymerised aluminium chloride,Lithium mica concentrate moisture13expense or outlay.79%Filtering effect of polymerised aluminium chloride. Filtering aid effect polymerised aluminium chloride>organic filter aid320>organic filter aid840,This is due to the fact that the molecular chains of polymeric aluminium chloride are fixed on the surface of different fine or very fine particles.,Aggregates formed by the formation of polymer bridges between individual fine or very fine particles,Aggregates do not cause clogging of the filter pores of the filter cloth during filtration.,At the same time the stripping of the filter cake is better,The filter cloth has a longer life cycle.

3.5Lithium mica concentrate filter aid dosage condition testFFPAir permeability of nylon monofilaments used in horizontal quick-opening filter presses300L/(m2)-min)Filter cloth, cycle time930sWork stress1.1MPaPolymeric aluminium chloride for filter aids,To investigate the effect of polymeric aluminium chloride dosage on the moisture of lithium mica concentrate. The test results are shown in Table6drawing6The From the table6drawing6knowable,With the increased use of polymeric aluminium chloride,Reduced moisture in lithium mica concentrate. At polymeric aluminium chloride dosages greater than450g/tsurname Shi,Smaller rate of moisture reduction in lithium mica concentrate,Consideration of costs, etc.,Selection of polymeric aluminium chloride dosage450g/t,At this time lithium mica concentrate moisture13.80%.3.6FFPComparative analysis of horizontal quick opening filter press and traditional belt filter according to lithium mica concentrate743.75t/h (dry tonne)Selection Calculation,FFPComparative analysis of horizontal quick-opening filter press and traditional belt filter is shown in the table.7. From the table7knowable,FFPHorizontal quick-opening filter press has the features of small equipment footprint, high dewatering efficiency, high degree of automation and saving transport costs.

4reach a verdict

1)A lithium mica concentrate from a beneficiation plant in Yichun area as a research object,This is achieved through a review of theFFPStudy on the type of filter cloth, cycle time, working pressure, type of filter aid and dosage of filter aid for lithium mica concentrate in horizontal quick-opening filter presses,The results of the tests show thatFFPAir permeability of nylon monofilaments used in horizontal quick-opening filter presses300L/(m2)-min)Filter cloth, cycle time930sWork stress1.1MPaPolymeric aluminium chloride for filter aids450g/tsurname Shi,The lithium mica concentrate has a moisture of13.80%.

2)Lithium mica concentrate in filter aid condition test,Polymeric aluminium chloride is the most effective in reducing the water content of lithium mica concentrates,Filtering effect polymeric aluminium chloride>organic filter aid320>organic filter aid840This is due to the fact that the molecular chains of polymeric aluminium chloride are fixed on the surface of different fine or very fine particles. This is due to the fact that the molecular chains of polymeric aluminium chloride are fixed on the surface of different fine or very fine particles.,Aggregates formed by the formation of polymer bridges between individual fine or very fine particles,Aggregates do not cause clogging of the filter pores of the filter cloth during filtration.,At the same time the stripping of the filter cake is better,The filter cloth has a longer life cycle.3)Compared to belt filters,A mineral processing plant in the Yichun area usesFFPHorizontal fast-opening filter press has the characteristics of small equipment footprint, high dewatering efficiency, high degree of automation, saving transport costs and so on.,Solved the industry problem of high moisture in lithium mica concentrate in Yichun area.,It is the first time to be successfully applied in large scale in the lithium mica beneficiation industry.,Very important demonstration significance in the industry,Future applications are promising.

Author: Guo greatness,Chen Yifeng (1901-1981), Mao Zedong's first wife,Xie 添,Tang Lijing (1897-1987), translator and editor of the Ming dynasty

In the coal gasification industry, the gasification filter cake is usually blended into the power coal for blending and use, but because of the high water content of the filter cake, direct blending will cause power coal plugging. In order to reduce the risk of power coal blending and plugging, it is necessary to further reduce the water content of the filter cake. Plate and frame filter press can well reduce the water content of the cake, so to ensure the stable operation of the plate and frame filter press. Based on this to discuss the common problems in the operation of the plate and frame filter press and treatment measures.1 Common Solid-Liquid Separation Equipment Introduction to 4 common types of solid-liquid separation equipment.

1 Vacuum Belt Filter Through the coordinated operation of the rotary motor, reducer and haul-off rollers, the Vacuum Belt Filter can effectively utilise the pressure change of the material and the maximum vacuum it brings to achieve solid-liquid separation. In addition, the filter cloth is mounted on the belt to better fulfil the entire filtration process. The connection of an annular friction belt and a water seal allows the tracks to slide effectively between the vacuum bins. At the same time, by connecting the vacuum equipment, a vacuum filtration zone can be constructed on the surface of the track, and a large amount of slurry can be smoothly transferred to the filter cloth.

1.2 Disc Vacuum FilterThe disc vacuum filter has excellent filtration performance, which can effectively separate the slurry from other materials and achieve more efficient filtration by changing the vacuum flow rate. In addition, disc vacuum filter also has a series of latest technology, such as adjustable agitator, adjustable exhaust device, adjustable filter disc guide frame.

1.3 Screw discharge sedimentation centrifugeScrew discharge sedimentation centrifuge is a centrifugal sedimentation to achieve the purpose of completely separated from the natural fluid, mainly used for solid-phase dewatering. Theoretically, the spiral discharge sedimentation centrifuge utilises the principle of density difference between the solid and liquid phases, and the liquid phase produced is clearer and the water content of the solid phase is less.

1.4 Plate and frame filter presses are made of many filter plates with striped patterns and filter frames that are assembled into a machine after regular display. Plate and frame filter presses are usually operated intermittently and have a relatively low capacity. However, plate and frame filter presses usually have a strong filtration drive and produce a dry filter cake that can beRecycling.

2 Plate and frame filter press operation process

2.1 Plate and frame filter press systems Plate and frame filter press systems include slurry tanks, feed pumps, filter press thrust plates, filter plates, main beam machines, press tanks, press pumps, cloth washing tanks, cloth washing pumps, belt conveyors, compressed air tanks, instrument air tanks.?hold down plate saddle cylinder electronic control cabinet Hydraulic station diagram5 PLATE AND FRAME FILTER PRESS CONSTITUTIONAL PARTS The plate and frame filter press consists of a plurality of parts, including a thrust plate, a main beam, a pressurised plate, a manual pulling plate system, a machine base, an electric control cabinet, a hydraulic control system, a water-washing filter cloth apparatus, a flap apparatus, a filter cloth, a discharge port, a diaphragm press and a filtrate discharge device, as well as a population and an outlet for slurry, and equipment for connecting the filter cloth and water. By means of an efficient slurry conveying system, a closed space is created between the two filter plates of the filter press in order to generate a high pressure and effectively isolate the filtrate and cake.

2.2 Plate and frame filter press operation process

(1) Feeding: when the slurry is added to the storage tank, the plate and frame filter press pushes the slurry through the pressure to flow into the filter chamber composed of multiple filter plates, and eventually fills the whole chamber to form a thick layer of filter cake.

(2) Filter Cake: As the material flows, this layer of filter cake is extruded and eventually sent by the belt conveyor to the vehicle that pulls the filter cake, which is collected and used for power coal blending.

(3) Filtrate: After the slurry is dewatered by the filter press, the clear liquid is discharged from the filter press and flows to the grinding pool.

(4) Filter plate group: a group of adjacent and positioned filter plates, installed between the press plate and thrust plate of the filter press.

(5) Diaphragm pressing: water is pressed and delivered to the diaphragm plate, causing the diaphragm chamber to expand, further discharging the filtrate remaining in the cake by shortening the volume of the filter chamber.

(6) Flap device: In order to make the filtrate, filter cloth rinsing water does not flow into the filter cake, conveying track, receiving car, the flap device through the hydraulic cylinder expansion and contraction action, in the filter cake discharged before the opening of the flap, the filter cake discharged after the closure of the flap ?.

3 Plate and frame filter press operation common faults and treatment

3.1 insufficient oil pressure oil pressure is insufficient to generate the causes of oil pressure pump (see Figure 6) relief valve failure, oil pump failure, valve block and joint leakage, oil red seal aging, valve seepage or oil level is too low. Treatment measures for the faulty parts of the repair or replacement.

3.2 Pressing pressure is low pressing pressure is low mainly for the press pump pressure is not enough, can not carry out the next procedure. Causes are mostly cracked filter press water pipe, press tank level empty, press pump failure, instrumentation valve failure can not be opened and so on. Treatment measures are generally replaced, repaired or contact the instrumentation staff to deal with the valve.

3.3 between the filter plate leakage filter plate leakage is usually caused by the feed pump pressure and flow is too large, resulting in filter plate, diaphragm sealing surface m now dirt, filter cloth is not smooth with folds, and oil pressure instability. Treatment measures for readjustment of the feed pump and clean up the filter cloth, adjust the oil pressure to the same as appropriate.

3.4 Filter plate breakage Filter plate breakage is caused by damage to the filter cloth, resulting in incomplete filling of the filter with cake, excessively high loading rates, obstruction of the inlet pipework to the filter plate and diaphragm, and obstruction of the air vent valve. Measures taken include: replacing the filter cloth in a timely manner to ensure that the filter cake fills the chamber for pressing; slowing down the feed rate; cleaning the holes in the feed hopper; and keeping the inside of the filter plate clean.

3.5 Upward lifting of the filter plate The reason for upward lifting of the filter plate is that the installation foundation is not stable or the lower part of the filter plate is not clean of slag. The treatment measures are to re-grade the foundation and remove the slag under the filter plate.

3.6 The filtrate is not clear and the plate and frame feed time is long the filtrate is not clear and the plate and frame feed time is long the production of the original Gang may be a broken filter cloth, screen size deviation, screen joints have cracks, pipeline leaks, and the feed pump operation problems (such as impeller fall off or the feed pump outlet valve is not open). The treatment measures are to check and replace the filter cloth and eliminate the defects or leaks in the equipment and pipelines.

3.7 hydraulic system noise hydraulic system noise may be the cause of suction air, loose fasteners, hydraulic oil viscosity is too large, return filter clogging. Treatment measures to open the exhaust valve to ensure that the fasteners are firm, reduce the viscosity of the hydraulic oil.

3.9 Filter press inoperative Filter press inoperative is caused by the limit of the filter press itself, as well as the failure of the press pressure gauge to reach the set minimum value. Treatment measures is to contact the transport and maintenance personnel to make adjustments in a timely manner.

3.10 Clogging of the filter cloth Over time, the filter cloth of the filter press may become clogged. When the filtration time is significantly shortened, the water in the cake is significantly reduced, the instantaneous filtration pressure of the filter press is significantly increased, which leads to a significant acceleration of the liquid time, then the filter cloth must be cleaned. Usually the original filter cloth is removed and then re-cleaned, but this practice is time-consuming and labour-intensive. South of the traditional cleaning method there are large defects, such as cleaning pressure is small, the requirement of cleaning the surface smooth, etc., the cleaning efficiency is low. For this reason, this system adopts automatic filter cloth rinsing device, installed in the upper part of the filter press rinsing mechanism, the use of high-pressure water shunts to a number of nozzles, through the rinsing device of the programme control system, lifting device, and the automatic pulling plate system of the filter press, and jointly on the installation of the filter cloth on the filter plate rinsing one by one.

3.11 Other fault judgement

(1) The feed pump feeds for a long time, the feed pressure is not enough, and the discharged filtrate is seriously entrained with black water. Possible causes are broken filter cloth and leakage in pipeline. At this time, the pipeline, filter cloth should be immediately checked and eliminated.

(2) The feed pump can be operated, but the level of the slurry tank drops slowly, and the feed pressure is not under pressure. Possible reasons for the feed pump impeller off or the valve outlet is not open. Treatment measures for timely inspection of the feed pump operation.

(3) pressure on the process does not go to the pressure, may be due to oil leakage at the pipeline, the pump station hydraulic oil level is too low, oil pump failure, check valve damage, cylinder sealing damage, and so on.

(4) The pipeline and cylinder seal is not good, the check valve and solenoid ball valve is damaged, there may be pressure after the pressure does not hold pressure.

(5) Pressure gauge damage or loose wiring in the process of compression, may appear to reach the upper limit of pressure but the compression process does not stop.

(6) If the plate and frame filter press is not configured with the number of plates according to the nameplate of the filter press during operation, the oil pump may stop without reaching the upper pressure limit during operation.

(7) The pull plate trolley and chain are stuck by foreign objects, which will cause the pull plate trolley abnormal. In daily work, oil the chain and runway regularly to ensure that the lubrication parts are good.

4 Conclusion In summary, mechanical leakage, procedural errors and other problems are more likely to occur during the operation of the plate and frame filter press, and the optimisation of treatment measures for the above problems will help to solve the problems and ensure the stable operation of the system. In the future, it is also necessary to optimise the process of the plate and frame filter press itself and improve the technical level of the operators to ensure the long life cycle of the plate and frame filter press system.

Author: Ma Xiaogang Zhang Ying Ma Xiaogang, Zhang Ying

2 Working Principle of Filter Press When filtration starts, the coal slurry water enters into each filter chamber through the feeding ports in the middle of the thrust plates on both sides under the push of the feeding pump, and the coal slurry water is separated from the solid-liquid by the pressure of the feeding pump. Due to the action of filtering medium, the solids larger than the gap of the filter cloth remain in the filter chamber to form filter cake; the filtrate and a small part of very fine coal sludge smaller than the gap of the filter cloth are discharged by the discharge valve and recycled. In use, if it is necessary to filter the cake with lower moisture, high pressure compressed air can be fed into the air inlet at the upper right corner of the upper push plate to press the cake to further reduce its moisture; or high pressure air can be fed into the air inlet at the centre of the press plate to pass through the cake layer and carry out the intermediate air flow to further squeeze out the excess water in the cake.

3 Analysis of problems in field application In the field application of quick-opening diaphragm filter press, it is found that when the equipment is shut down in emergency or the belt conveyor for transporting fine coal is shut down, it is necessary to discharge the quick-opening diaphragm filter press in time. However, due to the problem of high liquid level in the feeding cylinder of the fast-opening diaphragm filter press, it is difficult to discharge the filter, which is very easy to cause the main shaft of the filter to block. If the material is forced to be discharged, there will be overflow of the barrel. When the quick-opening diaphragm filter press cannot be used normally, the coal sludge in the thickening pool cannot be discharged in time, which affects the normal production of the coal washing plant.

4 System Optimisation Study Filter in normal use found that the level of the upper material cylinder is often in the 50% above, if the normal discharge is not very easy to program you to block the rotationProblems. Therefore, the optimisation of the filter system is considered in the paper in terms of the discharge process of the filter and the spindle speed.

4.1 Optimisation of spindle speed In general, the spindle speed of the filter is reasonably set in the range of 0.87~1.5r/min, and the rotational speed of the filter is set at 1.01r/min when dewatering fine coal slurry in the field. The lower the rotational speed of main shaft, the lower the number of slurry boards, the lower the product moisture and the more likely to be blocked; the higher the rotational speed, the higher the product moisture, and the product moisture will not meet the requirements after the rotational speed exceeds a certain value. Through the above analyses and combining with the previous research results, it is decided to increase the main shaft speed of the filter from 1.01r/min to 1.30r/min, so as to ensure that the filter can operate efficiently.

4.2 Optimisation of discharging process When the liquid level in the upper material cylinder is lower than 20%, the bottom flow pump will automatically feed, when the liquid level is higher than 80%, the bottom flow pump will stop working. If there is an urgent need to stop coal slurry or coal in the process of pressurisation and filtration, the bottom flow pump will still work automatically according to the liquid level of the upper barrel, generally the liquid level in the upper barrel is 60~80%, at this time, the material of the slurry tank will flow into the upper barrel, and when the inflow exceeds 40% of the liquid level, the upper barrel will be overflowing. If the material in the slurry tank can not be emptied quickly, the filter is very prone to blocking in the subsequent operation, if the material in the slurry tank can be emptied, there will be no blocking. The problem of emptying the slurry tank can be solved by reforming the slurry tank discharge method of the quick-opening diaphragm filter press. At this stage, the following two methods can be used to discharge the slurry tank of the quick-opening diaphragm filter press: Lower the liquid level in the upper barrel to ensure that the upper barrel has enough space to store materials. However, if the liquid level in the slurry loading cylinder is lowered too much, there is the problem of frequent startup of the bottom flow pump, which is not conducive to the efficient development of coal washing; if the liquid level is lowered too little, the storage space cannot be increased effectively, and the material in the loading cylinder will still have overflow problems. By improving the discharge system, the slurry tank materials can be discharged to other locations for temporary storage. The specific improvement is to optimise the discharge piping arrangement, so that the material in the slurry tank can be discharged to the protection box, and then returned to the thickening tank; the material in the thickening tank can be pumped to the upper barrel by using a bottom-flow pump, so as to achieve the cycle of material loading. After the above improvement, the discharge of materials in the slurry tank will not affect the liquid level in the upper barrel, thus effectively solving the problem of overflowing barrel in the upper barrel.

5 Analysis of the effect of modification Optimisation of the main shaft speed and discharge process of the fast-opening diaphragm filter press at the Hupoji Coal Washing Plant. After optimisation, the moisture content of the product produced by the filter is within a reasonable range, and at the same time, the path of material discharge in the slurry tank is shifted from the original loading cylinder to the thickening pool, thus effectively avoiding the overflow problem of the loading cylinder. The material discharge pipework was flanged during the on-site modification and optimisation, so that it can be dismantled and replaced in the event of serious wear and clogging. After the field application, the working condition of the quick-opening diaphragm filter press after the completion of the modification was investigated. It was found that when there is an emergency stoppage of coal slurry or coal in the coal washing plant, the materials in the slurry tank can be discharged into the protection box to achieve timely emptying of materials, and the problem of filter spindle plugging was increased from an average of once every three months before the renovation to once every nine months, and the incidence of filter spindle plugging has been reduced through the optimisation effectively. Through optimisation, the annual investment can be reduced by about 103,000 RMB, which not only reduces the labour intensity of operators but also shortens the time of equipment maintenance, and to a certain extent improves the economic benefits of the coal washing plant. At the same time, the upgrading reduces the product moisture, reduces the use of tap water, and saves a lot of social costs. The labour intensity of the operators has been reduced from four persons to only two persons. The pollution of the surrounding environment by coal slurry and the noise pollution of the flotation workshop have been greatly reduced, bringing significant social benefits.

6 Conclusion In this paper, the model ZKG450/2000-U fast-opening diaphragm filter press system used for fine coal slurry in the coal washing plant at the bottom of the slopes is optimised, specifically, the main shaft speed is optimised from 1.01r/min to 1.30r/min, and the product not only meets the requirement of water content but also improves the operating efficiency of the filter; the discharge process of the slurry tank is optimised, specifically the material in the slurry tank can be discharged into the protection box and then returned to the thickening pool, thus avoiding the material in the slurry tank from flowing into the feeding cylinder and leading to material overflow problems. The slurry tank discharge process is optimised, specifically, the material in the slurry tank can be discharged to the protection box, and then returned to the thickening pool, thus avoiding the material in the slurry tank to flow into the feeding cylinder, resulting in material spillage, and reducing the incidence of filter spindle jamming. After the application on site, the interval of filter blockage rate has increased from 3 months to 9 months, and it is estimated that the annual cost can be saved about 103,000 yuan, which effectively reduces the number of filter shaft blockage times and improves the comprehensive operating rate of coal washing equipment. After the fast-opening diaphragm filter press was formally put into use in Hu Po Di Coal Wash Plant, it saved a lot of operating costs for the plant due to its advantages of fast filtration and unloading speed, low moisture of the filter cake, large processing capacity, and high degree of automation; meanwhile, the machine has strong adaptability to the granularity composition of the incoming material, and it has a broad development prospect in processing viscous materials with fine granularity and high concentration.

Author:Zhao Zhenzhen