硅藻土，活性炭过滤器操作

The Typical Filtration Process
FUNDAMENTALS OF OPERATION

Pressure-leaf filters, in either vertical or horizontal arrangement, provide excellent removal of suspended solids from a liquid. The slurry is introduced to the tank under pressure and is forced through the filter elements. Suspended solids are retained on the filter media, the clarified liquid flows to the interior of ths leaf and is discharged  to process. Solids are removed from the filter leaves and the unit is ready for another cycle. Even multiple filtering stations are normally a one-man operation.典型的过滤过程

操作基础
垂直或水平布置的压叶式过滤器可出色地去除液体中的悬浮固体。 将浆液在压力下引入罐中，并迫使其通过过滤器元件。 悬浮的固体保留在过滤介质上，澄清后的液体流到叶片内部，然后排出进行处理。 固体从过滤器叶片上清除，该装置准备下一个循环。 甚至多个过滤站通常也是单人操作。

Precoat preparation（预涂操作）

3到15升预涂硅藻土，活性炭或者硅藻土被配置到预涂罐中，浆料与活性炭硅藻土被混合

A filter aid (3 to 15 lbs. per 100 sq. ft of filter area) is added to the precoat tank filled with clear liquid or filter process liquid. The slurry is agitated until thoroughly mixed (5-10 minutes).

Precoating（预涂） 在排出所有空气之后，浆液现在通过过滤器再循环。 这将在每个滤叶上沉积一层均匀的预涂层（助滤剂）。 预涂期间液体的优选流速为30至60 每小时每平方英尺的水溶液。     ）

The slurry is now recirculated through the filter after venting all air. This will deposit a uniform layer of precoat (filter-aid) on each filter leaf. The preferred flow rate of liquid during precoating is 30 to 60 gal. per sq. ft. per hour for aqueous solutions.

Filtering（未过滤的处理液被泵送到过滤器中。 将滤液用于处理或储存，并继续过滤，直到形成完整的滤饼（）或流量减少为止。 如果固体本质上是粘稠的，则可能有必要借助配料泵将助滤剂浆液注入主进料管线。 这是一种称为“身体喂养”的常见做法。）

Draining and/or Blowdown（当过滤器准备好清洁时，只需让罐中未过滤的“鞋跟”随滤饼一起从罐中排出，或者通过气压将其吹回给料罐，通过叶片释放一些空气还可以 将滤饼放置在适当的位置，以排出“干滤饼”。）

When the filter is ready for cleaning, the unfiltered “heel" in the tank is simply allowed to drain from the tank with the cake or is blown back to the feed tank by air pressure, Releasing some air through the leaves also serves to keep the cake in place for “dry cake” discharge.

Cleaning（打开排水阀，并通过喷水将滤饼从滤叶上洗掉。 冲洗动作可以通过内置的集水箱，空气或蒸汽压力或手动软管来完成。 机械振动用于“干饼”排出。）

Drain valves are opened and the cake is washed from the leaves by means of water jets. This flushing action can be accomplished by a built- in sluicing header, air or steam pressure, or manual hosing. Mechanical vibration is used for “dry cake” discharge.