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Filter press is a common filter equipment in environmental protection, smelting and other industries. It has box type and plate frame type. It must be equipped with feed pump when using filter press. What kind of pump should be selected for the feed pump of this filter press? First of all, we need to know the characteristics of the filter press.
The operation characteristic of the filter press feed is that the flow rate is large and the pressure is low when feeding, and the flow rate is small and the head is high when the BIE pressure is in the later stage, and the demand for the feed pump is high, so there are the following requirements:
1、 The inlet and outlet of the pump shall be equipped with valve, pressure gauge and soft joint anti-seismic joint.
2、 In the second place of pump installation, the inlet and outlet pipelines shall be installed first, and then the anchor bolts shall be fixed to avoid tensile stress on the pump and damage to the pump when connecting the pipelines.
3、 The distance between the outlet pipeline and the pump device of the filter press is high. A check valve shall be installed at the outlet of the pump to prevent the high-pressure water hammer at the outlet from damaging the pump and reversing the impeller caused by the backflow when the pump is stopped.
4、 Configuration of pump inlet and outlet pipeline: in order to reduce pipeline flow resistance and improve pipeline delivery efficiency, the inlet and outlet pipe diameters of the pump shall be larger than the inlet and outlet diameters of the pump.
5、 In order to see the operation of the pump more directly, the pressure gauge should be installed at the outlet of the pump. The device is located on the straight line between the first valve at the outlet of the pump and the outlet flange of the pump. Otherwise, it is meaningless
6、 The inlet and outlet pipelines of the pump shall be equipped with a gravity support system, and the pump can not accept the weight of the pipeline, otherwise, the pump will easily deform after a long time.
7、 Setting of return pipe: when the pressure filter pump is in normal working state, when the pump reaches a certain pressure and the flow is less than 30% of the rated flow, it is necessary to turn over the valve on the return pipe at this time to stop the flow diversion, so as to stabilize the pressure of the pressure filter feed, and ensure that the materials in the pump cavity adhere to the liquid state with certain moisture. Otherwise, the pressure in the filter press will drop, and the material in the pump cavity will be dried under the action of centripetal force due to pressure holding, which increases the friction between the material and the pump and shortens the service life of the pump.
8、 If it is an automatic control installation, it is suggested to install a safety valve on the outlet pipeline. When the pressure reaches a certain value, it will automatically open the return pipeline of the safety valve.