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Detailed introduction of filter plate of press filter. Home > TECHNOLOGY > Detailed introduction of filter plate of press filter.
Filter plate is an important part of the filter press, the price is more expensive, and because of its heavy weight, it is also extremely inconvenient to replace. Due to improper use and maintenance, filter plate damage often occurs in production, which may cause material running between filter plates, and serious consequences such as filter plate deformation, sealing surface damage, diaphragm damage and so on, which not only affect normal production, but also cause heavy economic losses. Next, the Burson second-hand equipment will take you to analyze the causes of the damage to the filter plate of the filter press and how to deal with it. 


 
1. Damage caused by pressure imbalance on both sides of the filter plate: when the filter press is working, the filter plate needs to bear the pressure of 0.6MPa.When working normally, the pressure on both sides of the filter plate is balanced, and the pressure rises gradually from small to large to the outlet pressure of the feed pump. When the work is abnormal (may be due to blockage of the water outlet), the pressure in the filter cavity will quickly rise to the outlet pressure of the feed pump, while the pressure in the filter cavity on the other side of the filter plate (which may be normal or the feed is not smooth) rises gradually, so that a pressure difference is formed on both sides of the filter plate, resulting in deformation in the middle of the filter plate, thus damaging the filter plate. Therefore, during the feeding period of the filter press, the effluent of the outlet should be carefully observed. if there is no outlet, it means that the outlet may be blocked, stop the feed pump immediately, open the compression plate and the filter plate where the outlet is blocked or the feed is not smooth, check and repair, and then resume the feed pressure filtration after eliminating the fault. 
 
2. The damage caused by the damage of the filter cloth: the filter cloth is the filter medium of the filter press and the barrier to block the direct contact between the solid particles and the filter plate. Once the filter cloth is damaged, there will be solid particles between the filter cloth and the filter plate. Under the action of pressure, these solid particles will accumulate to the outlet of the filter plate, resulting in full or partial blockage of the outlet. Serious damage to the middle of the filter plate will generally cause the filter plate near the outlet, due to the pressure of solid particles, erosion to form grooves, destroying the sealing surface. Therefore, in the work, the effluent of the outlet should be observed at any time, and in the process of unloading, the filter cloth should be carefully checked and replaced immediately when it is found to be damaged, otherwise it will lead to serious consequences. 

3. Damage caused by excessive feed pressure: in practical work, the feed pressure seriously exceeds the allowable feed pressure of the filter press, resulting in high loss of material and filter cloth between the filter plates. The problem lies in the control of the inlet pump outlet valve. The operating instructions of the filter press require that the feed pressure should be gradually increased when feeding. In this regard, the measures are taken to fully open the outlet valve of the feed pump and install the unloading pipe on the feed pipe of the filter press. At the beginning of feeding, the pressure relief pipe valve is opened wide, and with the increase of the amount of solid particles in the pressure filter chamber, the pressure relief pipe valve is gradually closed, so that the feed pressure rises slowly to 0.6MPa, and enters the pressure filtration process. After keeping the pressure for a period of time, observe that when the outlet water decreases or drips, turn off the feed pump. After taking these measures, the feeding pressure can be gradually increased, the problem of excessive working pressure of filter press can be solved, the damage of filter cloth can be reduced, and the problem of material running between filter plates can be eliminated. 

To sum up, as long as we grasp the three key links of controlling the feed pressure, changing the damaged filter cloth in time, and keeping the outlet unblocked, the damage of the filter plate of the press filter can be completely avoided. it is of great significance to reduce the production cost, improve the operating rate and maintain the normal production order.