The selection of
Membrane Filter Press is critical to the economic indicators of large-scale production. The general selection method is as follows.
(1) Calculate the filtration area according to the production capacity and production scheduling requirements. Here you can select a small-type testing machine for testing to obtain the production data of the unit flow area of the corresponding material. Generally, it is doubled in an equal proportion or a certain safety output factor is taken.
(2) Select the position of the feed port according to the pressing pressure. If the pressure is above 15 bar, it is recommended to choose angular feeding. The angular feeding method avoids stress concentration on the diaphragm filter plate and avoids damage to the diaphragm filter plate under high pressure. At the same time, it can improve Membrane filter plate life.
(3) Select the cloth hanging method according to the frequency of filter cloth disassembly and assembly. The disassembly of the filter cloth requires production to be stopped, which has a greater impact on production. Filter cloths are available in sleeve type and hanging cloth type. The applicable method also needs to be selected in combination with the size of corner feed, middle feed and filter plate.
(4) The washing and selection of filter cloth is the key to the success or failure of filter cloth. The key to selecting the filter cloth is the amount of air induced and the weaving method. The permeability and amount must match the material. The type can be washed through a testing machine. The filter cloth weave There are twill and satin weaves. Satin weave has a faster slag discharge speed due to its special texture. Satin weave filter cloth needs to be thick and elastic enough to avoid slag leakage between the filter plates.
(5) The choice of feed pump generally includes screw pumps, plunger pumps, etc. It can be considered based on the characteristics of the material, the traveling area of the
Filter Press, whether pre-coating of filter aids is needed, etc. The feed pump needs to be frequency converted. Control and realize stepped feeding to ensure that the material is kept in the fastest filtration efficiency range, thereby shortening the feeding time.
(6) Other auxiliary functions, such as the automatic filter cloth cleaning system, automatic plate pulling system, backflush, side blowing and side washing system of the membrane filter press, should be selected according to the specific needs of the site and process.
With the rapid growth of urban population, urban water environment pollution is facing severe challenges. In order to quickly solve this problem, urban sewage treatment plants have been constructed on a large scale in recent years. The sludge produced during the treatment of sewage has also become a new source of environmental pollution. If it is not treated in time, it will cause secondary pollution. These sludges have High moisture content, odor and other problems will cause deep dehydration of these sludges.
One of the key processing objects
Research has found that after the sewage plant sludge is fully mixed and conditioned by adding polyacrylamide, and then using a membrane filter press to deeply dehydrate the sludge, a sludge filter cake with a moisture content of 60% can be achieved to achieve sludge reduction. Quantitative harmlessness: Moreover, the membrane filter press has mature technology, low moisture content, and low energy consumption.
Strengthen the training of operators and managers, strengthen the operation and maintenance of equipment, keep in mind and master the difficult and complicated problems that may arise in membrane filter presses, analyze and deal with the problems as soon as possible, and ensure the normal operation of the sludge dewatering system. And when used properly, the membrane filter press can give full play to its role. The filter cake moisture content is 60%, which can respond to sludge reduction and also lay a solid foundation for enterprises to achieve energy conservation and environmental protection goals.
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