Diaphragm filter press is more convenient to use, but there will be many problems in the process of use, the more common one is the turbidity of the discharge.
The filter cloth is damaged. The diaphragm filter press further dehydrates the filter cake and uses compressed air to fill the diaphragm. The pressure in the 2-dimensional direction due to the deformation of the diaphragm damages the arch bridge formed between the particles and squeezes the filtrate remaining between the particles. Compressed air pressure The maximum can reach 1.0MPa. When the press is performed without the feed and the filter cake not overflowing the filter chamber, the filter plate diaphragm is severely expanded and the filter plate is damaged. When the feed contains large solid particles, the filter chamber diaphragm is pressed Irregular side force causes the diaphragm to rupture. You can carefully check the turbidity of the filtrate flowing out, assuming that it is caused by the turbidity of the filtrate from a single nozzle, and it can be judged that the filter cloth here is damaged at this time. , it is necessary to check and analyze the reasons for the damage of the filter cloth. If it is caused by the improper use of the filter press, you should pay attention to the correct operation method and replace the filter cloth in the subsequent operation process.
Liquid leakage between the filter plate and the diaphragm plate. During the operation of the diaphragm filter press, the leakage between the filter plate and the diaphragm plate is one of the common shortcomings. The main reasons are: high pressure and flow of the material pump; lack of oil pressure; The filter cloth is wrinkled or the filter cloth is broken; the sealing surface of the filter plate and the diaphragm plate is filled with debris, etc. The treatment method is also relatively simple. According to the reasons for the shortcomings, the pump pressure and flow can be adjusted from scratch, and the oil pressure can be increased. Always ensure that the filter cloth is clean and flat, and replace the filter cloth in time if there is a hole in the filter cloth. Use a nylon scraper to clean the sundries between the sealing surfaces of the two plates. After the completion of the last cycle of each shift, each filter cloth should be washed.
Thread opening at the seam of the filter cloth. If the problem caused by the opening at the seam of the filter cloth is found, remove the filter cloth and sew it from the beginning.
The turbidity of the output material has a great influence on the operation efficiency. It is assumed that the turbidity of the output material should be repaired in time, but it is assumed that the diaphragm filter press is only turbid at the beginning of the operation, and then gradually becomes clear, which is a normal phenomenon.
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