压滤机工作流程中，初始进料时流量要大请求低，随着滤室内物料积满、滤饼增厚，透水性越来越差，过滤阻力增大、流量减小。这就请求压滤机泵进步扬程加大过滤流量降低过滤物料的水分，以此保证压滤机正常工作，期间的变化反响在泵的流量扬程特效曲线上是陡直的。另外进步扬程后，系统中的物料处于高压力的状态，此时容易形成泵壳发热盘根泄露等问题，从而影响压滤机的压榨工作，在过去这些问题搅扰了很多洗煤企业，而鼎千泵业研发设计的压滤机泵，圆满处理了这一系列问题。
Each coal washing plant has its own set of tail coal treatment filter press system, in which the filter press and filter press feed pump are important link equipment of the whole system. Here, the selection of slime pump for coal washing plant is mainly analyzed.
Feeding requirements of filter press:
In the working process of the filter press, the initial feed flow shall be large and the requirements shall be low. With the full material in the filter chamber and the thickening of the filter cake, the water permeability becomes worse and worse, the filtration resistance increases and the flow decreases. This requires the filter press pump to increase the head, increase the filtration flow and reduce the moisture of the filtered material, so as to ensure the normal operation of the filter press. The change during the period is reflected in the flow head special effect curve of the pump. In addition, after the lift is increased, the materials in the system are in a state of high pressure. At this time, it is easy to cause problems such as heating of the pump shell and leakage of the packing, thus affecting the pressing work of the filter press. In the past, these problems troubled many coal washing enterprises, and the filter press pump developed and designed by Dingqian pump industry has perfectly solved this series of problems.
