凹进式和膜板 压滤机 设备采用过滤介质来启动将浆料中的固体与液体分离的过程. The filtration media is typically referred to as a filter cloth.
滤布的种类
在 矿物 和 总 行业, 压滤机最常见的滤布是用聚丙烯等合成材料编织而成的, 聚酰胺(尼龙)和聚酯. The woven cloths are manufactured like other common cloth textile fabrics on large weaving looms, starting with individual str和s of synthetic threads.
单丝(单线)或多丝(许多单线纺在一起)线用于生产各种专门用于脱水应用的滤布.
Closeup views of mono-filament (left) 和 multi-filament (right) threads.
具有非常细粒度分布的浆料需要非常紧密地编织滤布来捕获最小的颗粒，同时允许浆料液体通过. More open weave filter cloths are effective when the slurry particle size distribution is larger.
Larger diameter mono-filaments are used to produce filter cloths that are stronger, 更耐磨，更持久, but they inherently cannot capture very fine slurry particles.
较小直径的单丝用于生产紧密编织的滤布，可以捕获细颗粒, but these cloths have lower strength 和 wear resistance. 为了克服这个缺点, 细股多丝滤布用于捕获非常细的颗粒尺寸以及提供强度, 耐磨性和寿命.
滤布的作用
一旦浆液被泵入滤板之间的空隙中，滤布被用来分离浆液的固体和液体部分.
最初, 一些最小的浆液颗粒穿过滤布网，直到一层脱水固体积聚在滤布表面. The accumulated solids then begin to filter additional slurry material, 捕获几乎所有的固体颗粒，只允许清澈的液体(滤液)通过滤布.
展示压滤机工作原理的动画. 注意滤布是如何让液体通过而固体在表面堆积的.
滤布磨损
这种浆料的初始过滤将在较长时间内对滤布造成磨损. 当滤饼从压滤机排出时，滤布表面也会发生正常磨损 脱水周期. 这种类型的磨损很大程度上取决于饼料的磨料特性和布料的耐磨性. It is difficult to predict the normal cloth life cycle for any 压滤机 application, but a good quality cloth material should last for hundreds if not thous和s of cycles.
不可避免地, 在每个过滤周期中，少量的浆液颗粒会嵌入滤布网中. 随着更多的过滤循环的完成, sufficient slurry particles will become lodged in the cloth mesh, inhibiting the filtration rate of the slurry 和 prolonging the filtration cycle time.
通常, 当为应用选择了适当设计的滤布时，该过程将在很长一段时间内发生.
To achieve maximum cloth life 和 high filtration rate efficiency, the filter cloths should be periodically inspected 和 cleaned, but eventually they will need to be replaced because they will wear out.
常规滤布清洗
在正常压滤机操作期间, small slurry solids will accumulate 和 build up on the surface of the filter cloths. The buildup on the filter cloths is dependent on many different factors including:
- 滤布设计
- 浆料补料
- 物料粒度分布
- 物料吞吐率
- 营业时间
- Chemical additives utilized in the upstream processes
至少, 过滤布应每周用工艺或清水冲洗，以清除布表面多余的积聚物, especially near the perimeter sealing areas 和 on the stay bosses, 请看下面照片中突出显示的区域.
Filter plate with perimeter 和 stay bosses highlighted.
清洗布料将防止固体物质的积累，这会加速布料的磨损，并可能在正常的压榨操作中导致浆液爆裂.
在一些极端应用中, 每个过滤周期后可能需要清洗滤布，以保持良好的过滤效率和滤布的使用寿命.
如果压滤机长时间关闭(几天或更长时间)，也应彻底清洁布料，以防止布料表面的物质积聚变干. 一旦干, the contamination can become much more difficult to remove 和 will accelerate cloth wear.
清洁系统
Automated cloth washing systems are available when cloth cleaning is required on a frequent basis, 从每隔几小时到每隔一个周期. 这些自动化系统可以提供一个简单的洪水冲洗，用低压冲洗布料表面, 大容量水喷雾.
Lower volume, high-pressure systems are also available for the most challenging applications.
定期清洗将延长滤布的使用寿命，并防止因吹出而意外清洗滤布或因磨损失败而意外更换滤布.
Repairing/Replacing Damaged or Worn Filter Cloths
As cloths become older, the risk of developing small holes increases due to localized cloth wear. 最常, 当出现小布孔时, the filtrate water will remain cloudy coming out of the 压滤机 near the damaged cloth, so the filtrate should be inspected regularly to check for potential cloth damage.
一旦布料表面出现小洞, the slurry will pass through the cloth rapidly in that area, causing further damage to the cloth 和 potentially severe damage to the filter plate surface.
Filter cloths should be inspected once a week for tears or folds. 任何时候发现布洞, it should be repaired or replaced immediately to prevent further damage.
如果布孔足够小, 不到几英寸, 可以使用管道胶带或类似方法临时修补孔，步骤如下:
布临时贴片程序
- Locate the cloth damage area 和 inspect both sides of the cloth 和 filter plate surface.
- If the damage is not severe, thoroughly clean both sides of the filter cloth.
- 尽量把滤布擦干. Common compatible solvents can be used to aid the drying process.
- Attach tape to both sides of the filter cloth, ensuring the tape remains attached.
- 注意打补丁的布的位置，并定期检查，直到布因正常磨损而更换.
当压滤机充浆或在高压过滤阶段发生浆体爆裂时，两个板密封面之间也会损坏滤布.
If the blowout is allowed to continue for several minutes or more, the cloth is easily damaged due to the high velocity of slurry passing across the cloth surfaces.
任何时候发生泥浆井喷, 应停止压榨循环，检查布料，找出可能的爆裂原因，并检查布料损坏的程度. 如果布料严重损坏, it should be replaced immediately to prevent the risk of another blowout, which will further damage the cloth 和 eventually damage the filter plate surface.
如何更换滤布
菠菜网最稳定正规平台_最全菠菜网大全 压滤机 filter cloths can be replaced without removing the plate from the press. 要做到这一点, 在对压滤机进行维护之前，首先切断电源并锁定所有设备和部件. 除了, follow all required fall protection procedures 和 all site-specific safety requirements.
去除滤布:
- Fully open the press, leaving as large a gap as possible between the filter plates.
- Center the filter plate for the cloth change in the center of the gap.
- 剪断拉链，打开魔术贴，将滤布从滤板的周长上释放出来.
- 将滤布卷在滤板一侧，滑过滤板进料孔口.
- 是否更换衬布, cut the zip ties 和 remove the individual backer cloth from each side of the filter plate. It is not necessary to replace the backer cloth every time the outer cloth is replaced.
- If the backer cloth is not being replaced, carefully inspect it 和 clean it thoroughly with water. Also, inspect 和 clean any slurry buildup on the filter plate surface.
安装滤布:
- 是否更换衬布, 在板的两侧各放置两块背布，并在板的顶部用拉链系住, 用滤布适当地对准滤板的进料孔开口和上部进料滤孔. 就位后, attach the backer cloths to each other with zip ties along the sides 和 bottom of the filter plate.
- Roll up one side of the new filter cloth 和 slide it through the filter plate feed hole opening.
- Unroll the filter cloth 和 position the filter cloth on both sides of the plates, 以适当的方位将滤板上料孔开口与上滤孔对齐.
- Attach the filter cloth at the top of the filter plate with zip ties.
- 将滤布侧面和底部的尼龙搭扣(Velcro®)贴到滤板上，以正确固定滤布, ensuring there are no wrinkles or creases in the cloth surfaces.
- Wash down the new filter cloth with water to remove any dirt or debris.
良好的滤布检查和常规的滤布清洗是板式压滤机高效运行的重要组成部分. 例行检查和清洗将延长滤布的使用寿命，并保持最高的脱水效率.
