The greater the air permeability of the
Membrane Filter Press filter cloth, the faster the processing efficiency, but it will cause the oil level to increase and fail to meet the quality index requirements.
Therefore, on the premise of meeting the turbidity requirements, the initially selected model of filter cloth is also certain, and its initial air permeability is also certain. As the production batches of the filter cloth gradually increase, its filtration performance will gradually decrease, which will affect the output. This characteristic is called the attenuation characteristic of the filter cloth. When the attenuation of the filter cloth reaches the low value of the output, it needs to be soaked in alkaline water and cleaned. Improve the passability of filter cloth.
Therefore, the filter cloth of the filter press needs to be cleaned regularly according to its attenuation characteristics.
There are many factors that affect the filtration performance of the chamber membrane filter press, which can be mainly divided into two categories: operating parameters and structural parameters. This chapter first explains the relevant indicators for evaluating the overflow sustainability of the press, and then uses software to change the operating parameters and structural parameters that affect the filtration performance of the chamber diaphragm press, further showing the distribution law of the indoor sludge two-phase flow field, and in-depth Study the influence of different parameters on the filtration performance of chamber membrane filter press.
The hydraulic pressing mechanism of the filter press consists of a hydraulic station, a cylinder, a piston, a piston rod, and a Hafland card hydraulic station that connects the piston rod and the pressing plate. The structure of the hydraulic station consists of a motor, an oil pump, and a relief valve (for regulating pressure). Directional valve, pressure gauge, oil line, oil tank.
Filtration method: The way the filtrate flows out is divided into open flow filtration and undercurrent filtration. For open-flow filtration, the outlet hole at the bottom of each filter plate is equipped with a water nozzle, and the filtrate flows out of the water nozzle intuitively. In underflow filtration, there is a liquid outlet hole under each filter plate. The liquid outlet holes of several filter plates are connected to form a liquid outlet channel, which is discharged through a pipe connected to the liquid outlet holes under the thrust plate.
Washing method: When the filter cake needs to be washed, sometimes there is one-way washing and two-way washing, and undercurrent one-way washing and two-way washing.
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