SU610543A1 - Pressure-filter for dewatering slurries - Google Patents

Description

(54) FILTER PRESS FOR DECOMPOSITION SUSPENSIONS

one

The invention relates to the field of wastewater treatment, in particular to filter presses with filter belts for dewatering suspensions, such as sewage sludge.

A filter press for slurry dewatering with endless filter belts is known, made in the form of two belt conveyors l installed one above the other.

The prior art filter press does not effectively dewater the slurries due to the lack of regulation of the pressure on the slurry.

A filter press for dewatering suspensions is also known, comprising filter belts made in the form of two endless conveyors, enveloping drums, vacuum chambers with roller drains, and a loading hopper 2.

Said filter press is closest to the invention in its technical essence and the result achieved.

When using such a filter press, it is not possible to regulate the pressure on the suspension, as a result of which effective dewatering of the suspension is impossible

when changing its consistency. In addition, it is not excluded that the suspension is poured over the edges of the filter belts.

The aim of the invention is to increase the efficiency of the dewatering process by regulating the pressure on the slurry and preventing it from pouring over the ribbons.

The goal is achieved by the filter press for slurry dewatering, which contains filter belts made in the form of two endless conveyors, envelopes drums, vases, and chambers with roller drains.

and hopper, equipped with a regulating device, which is located in vacuum chambers, and bumpers of elastic material. The bumpers are fixed on. edge of filter belts with

outside.

In addition, the regulating device is made in the form of pneumatic chambers.

FIG. 1 shows a filter press, a general view; in fig. 2 is an axometric view of the projection of a fragment of the filter belt; in fig. 3 is a section along A-A of FIG. 2; in fig. 4 is a section along b-b of FIG.

Filter press includes boot

Claims (2)

tank 1, conveyors 2 with filtering belts arranged parallely but one against the other, vacuum chambers 3 located on the side of the internal surfaces in the zone of convergence of filter belts, vacuum-chambers made with rows of rollers 4 with rubber pneumatic chambers 5 to bring the filter belts closer to individual compressed air systems. To ensure sealing of the vacuum chambers, rollers with bypass covers are mounted at the entrance and exit slots. The filter tapes are made of a metal mesh 7 connected along the edges with a filter cloth 8 with a metal tape 9 with perforations under the teeth of the driving and driven drum 10. For sealing the gap between the filter belts of conveyors in the proximity zone along the edges of the filter flax, elastic sides 11 are attached. from the rubber U-shaped profile and kinks in the middle of the racks inside the profile. In order to increase the tightness of the gap, it is advisable to make the U-shaped profiles of magnetic rubber. The filter press works as follows: From the loading tank 1, the suspension enters the gap between the filter belts of the conveyors 2. The vacuum of the vacuum chambers 3 is sucked out from both sides and pressed by the filter belts by bringing the rollers together by four pneumatic chambers 5, to which compressed air is supplied in the area of the exit of the suspension, the maximum force is compressed under high pressure into the lower pneumatic chambers. The suspension of the suspension from the gap between the filter belts is prevented by rubber U-shaped profiles, the struts of which are compressed as the filter belts move closer. The regeneration of the filter belt is carried out with water supplied from the silo-shaped nozzles 12 and washing the inner and outer surfaces of the filter belts. The use of the proposed filter press will allow the suspension to dehydrate with less labor and energy, since the pneumatic chambers practically do not consume air to bring the filter belts closer together, and the energy-intensive vacuuming process plays a secondary role in dewatering the suspension. At the same time, the simplicity of the design leads to insignificant material and financial costs in the manufacture and operation, and the ability to control the efforts of squeezing the suspension and sealing the gap between the converging filter belts of conveyors and other design features described in the description will allow you to apply the proposed filter press for various suspensions national households, including dewatering of sewage sludge in the structure. The use of this filter press will make it possible to regulate the force of squeezing the suspension and sealing the gap between the converging filter belts of conveyors due to the specified design features, i.e. dehydrate the suspension with less labor and energy. Claim 1. Filtration press for dewatering suspensions containing filter belts made in the form of two endless conveyors, envelopes drums, vacuum chambers with roller drains and loading hopper, characterized in that in order to increase the efficiency of the dehydration process by adjusting the pressure on suspension and preventing the outflow of the latter over the ribbons; the filter press is equipped with a regulating device located in vacuum chambers and flanges of elastic material fixed along the edge and m filter belts from the outside. 2. Filter press according to claim 1, characterized in that the regulating device is made in the form of pneumatic chambers. Sources of information taken into account in the examination: 1. The author's certificate of the USSR 70926, M. CI 01TE 33/14, 1974. 2. Authors certificate of the USSR 476010, M. KL7 V 01 D 33/14, 1973. w / w eo9 P YU Figg WStWS JsXXXXXX . v; x ib. . -  "I rf.,. Ae- -. t 6 - In Figz 8 FagL