The biggest advantage for the diaphragm filter press is the treatment of the moisture content of the filter cake. The biggest feature of the membrane filter press is that in each gap cycle, when the middle filter cake reaches the design component, when the feed filtration is stopped, it will not immediately pull the filter plate to discharge, but will expand the filter plate. As a result, secondary pressurization of the filter cake is performed.
Because the filter plate of the membrane filter press adopts a hollow structure composed of two layers and stores two iron plates in the middle, it can withstand high pressure. As long as the expansion medium (usually pressure hydraulic oil) is passed into it, the filter plate will swell. However, since the space of the filter room is fixed, the space occupied by the filter plate increases, the natural filter cake The space will be reduced, which will cause more moisture in the filter cake and unstable water structure to press out, resulting in water loss of the filter cake, that is: the reduced volume of the filter cake is achieved by reducing the moisture . This results in a lower moisture content of the filter cake after filtration by the membrane filter press.
When it comes to moisture content, we can use data to illustrate. The filter cake after the chamber filter press generally has a moisture content of about 18%, while the plate and frame filter press is about 20%. However, the membrane filter press can generally be controlled at 12%, and the filter press can be controlled to a minimum. About 9%. From the above data, we can know that in the filter industry, the moisture content of the filter cake has been reduced by more than 40% through the membrane filter press.
China's filter press industry has a huge market space. According to relevant agencies, the demand will reach 100 to 13 billion yuan by 2015. Diaphragm filter presses have shown remarkable effects in terms of treatment capacity per unit area, reduction of filter cake moisture, and adaptability to the nature of the treated materials, and have been widely used in various fields where solid-liquid separation exists.
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