Cascade pressurization belt type pressure filter

Abstract

The invention discloses a cascade pressurization belt type pressure filter which comprises an upper filtering belt, a lower filtering belt, filtering belt pressing rollers, an upper filtering belt tension roller, an upper filtering belt adjustment roller, a lower filtering belt tension roller, a lower filtering belt adjustment roller, a metal mesh belt, metal mesh belt pressing rollers, metal mesh belt redirection rollers, a metal mesh belt tension roller and a metal mesh belt offset adjustment roller. The pressure filter can firstly perform pressure filtering through low filtering pressure and then perform the pressure filtering through high filtering pressure and finally perform the pressure filtering through higher filtering pressure; by adopting the method for gradually increasing the filtering pressure, the advanced dewatering on sludge is realized.

Description

technical field [0001] The invention relates to the field of solid-liquid separation equipment, in particular to a stepped pressurized belt filter press. Specifically, it relates to a cascade pressurized belt filter press capable of deep dehydration of paste materials such as sludge. Background technique [0002] The belt filter press is the main equipment for sludge dewatering, but the dehydration rate of sludge is closely related to the pressure of the filter press. The greater the pressure of the filter press, the better the dehydration effect and the greater the dehydration rate. The conventional belt filter press with pure filter cloth currently used has a small pressurization pressure and poor dehydration effect, while the belt filter press with auxiliary pressurization using a metal mesh belt has a high pressurization pressure, but due to the sludge Before dehydration, the water content is relatively high, the shear stress is small, and the holding capacity is poor. ...

AI Technical Summary

Problems solved by technology

The conventional belt filter press with pure filter cloth currently used has a small pressurization pressure and poor dehydration effect, while the belt filter press with auxiliary pressurization using a metal mesh belt has a high pressurization pressure, but due to the sludge Before dehydration, the water content is relatively high, the shear stress is small, and the holding capacity is poor. If the pressure is slightly higher, the sludge will be crushed, and the sludge will flow to both sides and the rear due to extrusion, and it is difficult for the sludge to be filtered to enter. In the filter press area between the upper and lower filter belts, even if a small amount of sludge enters the filter press area between the two filter belts, most of the sludge will be squeezed out from both sides of the filter belt, while the higher pressure Filtration pressure is necessary for the deep dewatering of sludge. Therefore, neither the conventional belt filter press with pure filter cloth nor the belt filter press with steel belt auxiliary pressure is suitable for deep dewatering of sludge alone.

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