The operating principle of the belt filter press is to use two permeable filter belts in a set of compression shaft rolling, the sludge pressure in the middle of the two filter cloth, Filter Press the filter cloth pressure filter. The following is the process of sludge dewatering:
The use of two drum pre-dehydration machine for pre-dehydration work in the pre-dehydration machine and flocculant mixed sludge particles remain in the machine, the water through the filter cloth out of the machine, until the sludge accumulated to a certain amount, from the The outlet of the pre-dewatering machine fell to the belt filter press.
The pre-dewatering procedure is very important, Filter Press it can improve the solid concentration of sludge into the pressure, so that the dehydration efficiency of the press.
After the dewatering of the sludge into the belt filter press, the first procedure is gravity drainage, Filter Press this procedure is again
Improve the solidification rate of sludge, and prepare for the next working procedure.
After gravity drainage, the sludge is again drained, Filter Press and the average distribution in the filter cloth, and gradually began to pressurize. The thickness of the sludge on the cloth will depend on the nature of the sludge and the speed of the filter cloth.
The sludge began to filter, the sewage in the middle of two filter cloth, Filter Press after a set of pressure shaft, the sludge is the pressure generated by the filter cloth dry, and filter cloth pressure can be adjusted according to the effect of dehydration.
Filter press generally by the head board, tail plate, Filter Press filter plate, hydraulic cylinder, the main beam, drive and pull the device and other components. Filter Press The hydraulic cylinder piston pushes the head plate so that the filter plate presses the adjacent filter plate to form the filter chamber. The mud is fed into the filter chamber by the mud pump, and the water is discharged through the drain through the filter cloth. Filter Press The solid mud forms the filter cake in the filter chamber. When the mud is filled with the filter chamber, use the high pressure pump to continue the pressure filtration of the mud, so that the solid solution in the filter chamber separation.
Operate the hydraulic system so that the tail plate moves toward the head plate and press the entire filter plate between the head plate and the tail plate. Thus, a hollow sealed filter chamber is formed between adjacent filter plates.
The feed pump feeds the mud from the feed port of the tail plate into the filter chamber. When the filter chamber is filled with mud, the filtration process begins and the mud is solid-liquid separated by the pressure of the feed pump.
In the early stage of the filter press, the thickness of the filter cake in the filter chamber is small, the resistance of the filter cake is small, the dehydration speed is fast, Filter Press usually at this time with low head, large flow pump. As the cake thickness increases, the resistance increases, the filter press rate decreases, at this time the application of high-lift small flow of the pump. The time required for the filtration process is determined according to the filtration characteristics and process requirements of the slurry. Filter Press When the specified filter press time is reached, the feeding is stopped and the filtration process is completed.
The main factor that affects the filter effect of the filter press is the control of the pressure. It is well known that the main working principle of the filter press is to realize the filtering function through the control and regulation of the pressure. Therefore, whether the pressure system is directly related to the filtering effect Good or bad.
Another factor that affects the performance of the filter press is the speed of filtration, and now many manufacturers are blindly pursuing the speed of product filtration and ignore the essence of filtration, Filter Press in fact, according to the liquid concentration and resistance and other factors to consider and appropriate Allocate the speed of use of the machine, which is designed before the designer needs to design their own good.
The factors that affect the filter effect of the filter are also the area of the filter. Filter Press As we all know, the larger the area of the filter, the faster the flow through the object will be, and the more the residue will be taken, the worse the filtering effect will be, Of course, Filter Press the same kind of density between the specifications is a large area as a small area of the filter, but for the mesh area of different products above this comparison method is not applicable.