Variable-chamber-containing box filter plate of box filter press

Abstract

The invention relates to a variable-chamber-containing box filter plate of a box filter press. The filter plate comprises a bearing plate and a press plate. The bearing plate and the press plate have corresponding shapes and sizes, and are equipped with a positioning pin, which makes the bearing plate and press plate move relatively but not rotate relatively. The inner and outer side surfaces of the bearing plate are provided thereon with a concave chamber and a convex chamber, respectively, an inner water permeable plate is arranged in the concave chamber, an elastic member is arranged between the inner water permeable plate and the press plate, and an outer water permeable plate is arranged in the convex chamber. Each of the outer water permeable plate, the bearing plate, the inner water permeable plate and the press plate is provided with a round via-hole at the center. The variable-chamber-containing box filter plate is improved upon a common filter plate in the invention. By adopting the press plate and bearing plate made of steel material, and mounting a high-strength elastic member between the press plate and bearing plate for holding the size of the chamber, the inventive filter plate can withstand high-pressure filtration, pressure difference at two sides of the filter plate and high-pressure pressing, meanwhile, the filtration performance of the filter plate is ensured by mounting the water permeable plates on the bearing plate.

Description

technical field [0001] The invention relates to a filter plate structure on a box-type filter press, in particular to a variable-chamber box-type filter plate. Background technique [0002] The filter press is a typical batch operation pressurized filtration equipment, which is suitable for solid-liquid separation of various suspensions. Widely used in chemical, petroleum, pharmaceutical, food, light, coal washing, fuel and metallurgy industries, and also suitable for textile, printing and dyeing, leather, paper and other environmental sewage treatment processes. It is an ideal solid-liquid two-phase separation equipment. There are three types of filter presses: plate and frame filter press, box filter press and vertical filter press. The box filter press is suitable for slurry that needs to be filtered under higher pressure and the filter residue does not need to be washed. [0003] The structure of the existing box filter press is generally as follows figure 1 , figur...

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Problems solved by technology

[0004] But in some occasions, the filtration pressure of the existing box filter press is not high enough, the filter plate 4 cannot withstand high pressure filtration, and the pressure difference between the two sides of the filter plate 4 cannot be too high, and the purpose of further reducing the moisture content cannot be achieved.

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