SU1650194A1 - Filter-press - Google Patents

Abstract

The invention relates to filter presses and improves productivity by reducing the time for cleaning. The filter press consists of a body 1 with a filter chamber 2 formed between the surfaces of the filter element 3 and the squeezing rigid element 4, made in the form of a truncated bark. At both ends of the filtering and squeezing elements are located the lower 5 and upper 6 sealing elements. The filter press contains nozzles 7 for draining the filtrate, nozzles 8 for supplying compressed air, and nozzle 9 for supplying slurry. 1 il.

Description

The invention relates to filter presses used for dewatering fine dispersible suspensions in the metallurgical, mining and other industries.

The aim of the invention is to improve the performance of the filter press by reducing the time of one cycle.

The drawing shows a General view of the filter press.

The filter press consists of a rigidly mounted on a fixed support of the casing 1. Inside the casing there is a filtering chamber 2 placed between the surfaces of the perforated filtering element 3 and the rigid pressing element 4, made in the form of truncated cones and installed coaxially with the possibility of axial movement relative to each other . The surface of the filter element is covered with filter cloth. The lower sealing element 5 and the upper sealing element b are located at both ends of the filtering and squeezing elements.

The filter press contains a pipe 7 for draining the filtrate, a pipe 8 for supplying compressed air and a pipe 9 for supplying the suspension. The piston is driven by a piston or crank mechanism interlocked with the valve 10 for supplying slurry, valve 11 for discharging filtrate and valve 12 for supplying compressed air.

The operation of the filter press is as follows. In the initial position, the pressing element 4 is at the bottom. Then, by means of a drive mechanism, the pressing element 4 moves upward until the lower sealing element 5 is closed. At this time, the slurry supply valve 10 and the filtrate discharge valve 11 are opened. Valve 12 is closed. Filter chamber

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filled with suspension, after which the valve 10 is closed. Upon further upward movement of the pressing element 4, a mechanical suspension of the suspension takes place in the filter chamber 2. The degree of pressing will be determined by the force developed by the drive mechanism. After pressing the cake, the drive mechanism is switched to moving element 4 down. When the pressing element reaches the lower position, close the valve 11 and open the compressed air supply valve 12. The crushed cake is removed through the annular gap formed between the filtering and squeezing elements at the bottom of the filter press. Then the cycle of operation is repeated.

The execution of the squeezing and filtering elements in the central part in the form of truncated cones, and the squeezing element from hard material makes it possible to eliminate the operation of cleaning the filtering element from the cake residues due to the fact that s of the lower part of the cones are missing

The possibility of material suspension is minimized. Due to the self-centering of the squeezing element, the conditions for sealing the filter bag 5 of measure 2 after unloading the cake are improved and the squeezing element is jammed. As a result, the time taken to clean the filter cloth is reduced, which increases productivity.

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Claims (1)

Claims of the invention: A filter press comprising a housing with a filter chamber placed between the surfaces of the filtering and separating elements arranged coaxially with the possibility of axial movement relative to each other, sealing elements, characterized in that Due to the reduction in the time of one cycle, the filtering and squeezing elements are made in the form of truncated cones, while the squeezing element is made of rigid material. YU