Plate-and-frame filter press

Abstract

The invention provides a plate-and-frame filter press. The plate-and-frame filter press comprises a rack, a filter plate, filter cloth and a hydraulic system, an annular pipe for feeding and discharging water and gas is arranged in the filter plate; a plurality of inner through pipes are uniformly distributed on the circumference of the inner side of the annular pipe; two outer through pipes communicated with the annular pipe are arranged on the outer side of the annular pipe, the adjacent outer through pipes are communicated through hoses, a center hole is formed in the middle of the filter plate, a center pipe is arranged on the rack, and the center hole is communicated with the center pipe; the plate-and-frame filter press further comprises a backwashing system, a central extrusion system and a hot drying system; the water inlet and outlet flow channels are arranged in the filter plate, so that the filter cloth can be backwashed before sludge enters the filter press, and the water permeation effect of the filter cloth is ensured; through the arrangement of the squeezing piston, secondary pressurization can be carried out after primary pressurization of fed mud; the hot drying system is additionally arranged on the filter press, so that hot dry air can be blown in to heat and dry the sludge after the squeezing piston retreats from the central hole channel, and the water content of the sludge is further reduced.

Description

Technical field [0001] The present invention relates to the field of sewage treatment equipment, in particular to a plate-frame filter press. Background [0002] Sludge dewatering is the flow of the original, concentrated or digested sludge to remove water, into a semi-solid or solid mud block of a sludge treatment method, at present, the sludge dewatering equipment on the market has plate and frame filter press, diaphragm plate and frame filter press, air bag plate and frame filter press, belt filter press, stacked filter press, centrifugal dehydrator and other types. Among them, the plate and frame filter press, the diaphragm plate and frame filter press, the airbag type plate and frame filter press, through the centrifugal pump, piston pump primary pressurization and diaphragm or airbag secondary extrusion to complete the dewatering, reduce the sludge moisture content; Belt filter press, by tightening the filter cloth and drum extrusion to complete the dewatering, reduce the s...

AI Technical Summary

Problems solved by technology

[0004] In view of the above-mentioned shortcomings of the prior art, the purpose of the present invention is to provide a plate and frame filter press, which is used to solve the complex structure, single function, low efficiency and manufacturing cost of the plate and frame sludge dewatering machine in the prior art. high problem

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