Troubleshooting of plate and frame filter press

Failure analysis of plate and frame filter plate loosening or even oil leakage: the hydraulic system of plate and frame filter mainly provides pressure When the oil injection in cavity a increases, the piston moves to the left, pressing the filter plate to make it closed When the oil filling in chamber B increases, the piston moves to the right and the filter plate of the filter is loosened Due to the precise manufacturing, the hydraulic system of the filter has less faults, so long as attention is paid to the daily maintenance Due to wear, oil leakage will occur every year or so At this time, the O-ring shall be repaired and replaced Solution: the common hydraulic failure of the filter also includes the pressure can not be maintained and the hydraulic cylinder is not suitable for propulsion The main reasons for the failure to maintain pressure are oil leakage, O-ring wear and abnormal operation of the solenoid valve The common treatment methods are to remove and check the valve, replace the O-ring, clean and check the solenoid valve or replace the solenoid valve It is obvious that the air is sealed inside the unsuitable hydraulic cylinder of the filter At this time, as long as the system extracts air, it can be solved quickly 2、 Fault analysis: sometimes, too much oil and dirt on the guide rod will cause the filter plate of the plate and frame filter to walk slowly or even fall off Solution: at this time, it is necessary to clean the guide rod in time and apply grease to ensure its lubricity It should be noted that it is strictly prohibited to apply thin oil on the guide rod, because the thin oil is easy to fall, making the lower side very slippery, and personnel are easy to fall during operation and maintenance here, causing personal injury accidents 3、 Failure analysis of groove mark on filter plate of plate and frame filter: after several years of use, some groove marks are washed out at the corners due to some reasons Once the groove mark appears, it will expand rapidly until it affects the formation of filter cake At first, the filter cake becomes soft and then becomes semi slimy After Zui, the filter cake cannot be formed Due to the special material of filter plate, which is difficult to repair, it can only be replaced with new ones, so it causes high cost of spare parts During this period, we tried some repairing agents, but the effect was not good all the time When Zui recently changed to oil surface repairing agent, the situation finally turned The trial effect was very good, and the sealing effect was achieved Solution: 1 Clean the groove and leak out the fresh surface, which can be cleaned with a small saw blade; 2 Mix the black and white repair agents according to the ratio of 1:1; 3 Apply the prepared repair agent on the groove, which is slightly higher; 4 Quickly Quickly cover the filter cloth of the filter, squeeze the filter plate together, make the repair agent and filter cloth stick together, and at the same time flatten the groove; 5 After extrusion for a period of time, the adhesive will form naturally, no longer change, and then it can be used normally 4、 Failure analysis of the formation of the filter cake of the plate and frame filter: there are many reasons for the formation of the filter cake of the plate and frame filter, such as insufficient or too thin feed, or blockage In order to find out the causes of these faults in detail, Zui finally found the exact problem, and then treated the problem Solutions: the main solutions are: increasing the supply, adjusting the process, improving the supply, cleaning the filter cloth or replacing the filter cloth, cleaning the blockage, cleaning the supply hole, cleaning the drain hole, cleaning or replacing the filter cloth, increasing the pressure or pump power, starting at low pressure, increasing the pressure, etc 5、 Failure analysis of the plate and frame of the plate and frame filter: the causes of the damage of the filter plate are as follows: 1 When the filter plate of the filter is not cleaned clean, sometimes it will cause the media to leak out Once it leaks out, the edge of the plate and frame will be washed out one by one A large number of media leaks out, resulting in the pressure can not be increased and the mud cake can not be formed 2 If the outlet is blocked by solid or the feeding valve or outlet valve is closed when starting, there is no leakage of pressure, so as to cause damage 3 When the material is not enough or the material contains unsuitable solid particles, it will also cause the plate frame itself to suffer too much stress and damage 4 When the sludge is too thick or dry, the feeding port will be blocked At this time, there is no medium between the filter plates, only the pressure of the hydraulic system itself At this time, the plate itself is easily damaged due to long-term pressure Solutions: 1 Use nylon cleaning Gua knife to remove the mud from the feed inlet; 2 Complete this cycle to reduce the volume of filter plate; 3 Check filter cloth, clean the drain outlet, check the outlet, open the corresponding valve and release the pressure; 4 Carefully clean the filter plate and repair the filter plate