Van filter filter cloth works.
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When the filter press work, all the filter plate is pressed between the movable head plate and the fixed tail plate, so that the adjacent filter plate is formed around the sealed chamber, and the slurry is fed into the feed hole of the fixed tail plate . After all the chambers are filled with pulp, the pressure filtration process begins and the slurry is subjected to solid-liquid separation by feeding the pressure of the feed pump into the slurry. The solid particles remain in the filter chamber due to the blocking of the filter cloth, and the filtrate is discharged through the drainage ditch on the filter plate by the filter cloth. When the filtrate is no longer flowing out, the dehydration process is completed. At this point, you can stop feeding, the head plate back to the original position, the filter plate moving device will be opened in succession. Filter cake off by its own weight. At this point, the pressure filtration process is completed.
(2) Diaphragm filter press working principle
The main difference between the diaphragm filter press and the current common box filter press is that a layer of elastic film is installed between the filter plate and the filter cloth. During operation, when the feed is finished, high-pressure fluid medium can be injected between the filter plate and the diaphragm, and then the entire diaphragm will bulge and pressure the filter cake, thereby achieving further dehydration of the filter cake, that is, squeezing and filtering.
(3) Comparison of two types of filter press process
Usually in the treatment of fine grain size, viscous material, the filter resistance, the filter plate filter ordinary constant pressure feed longer filter. The diaphragm-type filter press, this time may be appropriate to end the constant pressure feed, into the press filter, with a very short press time to replace ordinary filter longer filter pressure constant feed time.
When the filter press feed particle size coarse, non-sticky, the filtration resistance is small, short-term will basically no filtrate and terminate the feed. Ordinary filter press the next job is to open the first board, the filter plate began to discharge, the cake off rate is very low, even if most of the manual poke can not be a whole block, the filter cake moisture, unloading cake is very difficult, even Rinse the cloth after the next cycle, resulting in labor-intensive, unloading a long time. After the end of the membrane filter press into the feed, the filter into a short period of filtration process, so that the diaphragm pressure cake pressed drum further dehydration; membrane drum compaction of the filter cake, the discharge process, the filter cake can basically fall off Clean, thus completing the discharge process in a short time.
The above is the main difference between diaphragm filter press and ordinary filter press work. These differences make the diaphragm type filter press have a remarkable effect on the handling capacity per unit area, reducing the cake moisture and adaptability to the properties of the treated materials, and have been widely used in various fields where there exists solid-liquid separation. Diaphragm type filter presses are now considered as an alternative upgrade for common vat presses
(Addtime：2017-12-17)
