Compound tension filter press

Abstract

The invention provides a combined tensioning type filter press. The combined tensioning type filter press comprises a rack, a filtering unit, a pressing plate, a movable ejection device and a tensioning device, wherein the rack is composed of a thrust plate, two top beams, two bottom beams and an end bracket; the rack is of a framework structure rack composed of the thrust plate, the two top beams, the two bottom beams and the end bracket; the two top beams on the two sides of the thrust plate in the rack are sequentially provided with the filtering unit, the pressing plate and the movable ejection device; the movable ejection device is composed of an ejection bracket and an ejection hydraulic cylinder; the tensioning device is composed of two or four tensioning hydraulic cylinders; the filtering unit is pressed by adopting a manner of combing tensioning and ejection; and the problems that the weight of the whole machine is heavy, the operation pressure of a hydraulic system is high, the reliability is poor and the like, caused by the fact that traditional pressing type and tensioning type filter presses have inherent defects in the aspect of structural design are solved.

Description

technical field [0001] The invention relates to a solid-liquid separation device, in particular to a composite tension filter press for filtering suspension. Background technique [0002] At present, the traditional filter press is a frame composed of a thrust plate, a main beam, a pressing or tensioning device, a pressing plate placed on the main beam of the frame, several filter plates and filter plates laid on its surface. The filter unit composed of cloth. When the filter press is working, the compression or tension device first pushes or pulls the compression plate to compress the filter unit between the compression plate and the thrust plate, so that the filter unit forms several well-sealed filter chambers, and then the matching The feeding pump presses the suspension to be filtered into the filter chamber through the pipeline connected to the inlet of the thrust plate, and the liquid phase in the suspension passes through the filter cloth to form filtrate, which is ...

AI Technical Summary

Problems solved by technology

[0004] (1) The sealing of the filter unit adopts the compression method. The main beam in the frame not only bears the gravity generated by the filter unit’s own weight and the weight of the filter cake, but also bears the huge tensile force generated when the filter unit is compressed. It is very easy to lose stability and deform under stress; to meet the rigidity and strength requirements of the main beam and improve the reliability of the whole machine, it is necessary to increase the cross-sectional size of the main beam, which directly leads to an increase in the weight and manufacturing cost of the whole machine

[0005] (2) The sealing of the filter unit adopts the tensioning method. Although the main beam in the frame does not bear the composite stress, the stress condition of the frame is improved in essence, but the force-bearing area of ​​the piston in the rod chamber of the tensioning hydraulic cylinder Small, to produce the same pressing force as the pressing method, it is necessary to increase the bore of the hydraulic cylinder or increase the operating pressure of the hydraulic system. Increasing the bore of the hydraulic cylinder will lead to an increase in the weight and manufacturing cost of the whole machine, and improve the hydraulic system. Operating pressure not only increases the manufacturing cost but also reduces the reliability of the whole machine

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