Filter cake blowing apparatus of filter press

Abstract

The invention discloses a filter cake blowing apparatus of a filter press. A feeding flange is welded on a filter press thrust plate; the filter press thrust plate is connected with a filter plate feed opening through a pipeline; a flange is arranged on a feeding pipeline and connected with the thrust plate feeding flange; a check valve and a feeding control valve are mounted on the feeding pipeline; a blowing pipeline is welded at the opening of the feeding pipeline; a check valve and a blowing control valve are mounted on the blowing pipeline; a safety valve and a pressure gauge are arranged at the upper end of a gas storage tank; a sewage drainage opening is formed in the lower end of the gas storage tank; a flange is arranged at the gas storage tank and connected with the blowing pipeline; the gas storage tank is connected with an air compressor or other gas sources; the blowing pressure of the gas storage tank is greater than the feeding pressure of a filter chamber; the gas volume of the gas storage tank is two times more than that of the volume of the filter chamber. With adoption of the filter cake blowing apparatus disclosed by the invention, the slurry in the feeding hole of the filter press filter plate and the slurry in the filter cake can be quickly discharged completely through high pressure blowing, so that the water content of the filtered filter cake can be reduced to be lowest, the filter cake can reach the purity after being filtered, and the filtrate recovery rate can be increased; the apparatus is simple in structure, convenient to mount and maintain and capable of improving the filter efficiency.

Description

technical field [0001] The invention belongs to the field of filter presses of filter equipment, and more specifically relates to a filter cake blowing device of a filter press. Background technique [0002] The filter press is the main filtration equipment in the solid-liquid separation industry. The filter press belongs to intermittent circulation filtration equipment. When filtering, the material is injected into the filter chamber of the filter plate through the pressure of the feed pump, and the filter cloth in each filter chamber intercepts the material in the filter chamber. The particles form a filter cake, and the filtrate is discharged from the four corners of the filter plate. After the feeding is completed, the filter plate is pulled apart by the plate puller to remove the filter cake. One cycle is completed to achieve the purpose of solid-liquid separation. [0003] In the field use of the filter press, it is found that there are deficiencies when the filter cak...

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Problems solved by technology

[0003] In the field use of the filter press, it is found that there are deficiencies when the filter cake is unloaded after the filtration is completed. Because the feed hole in the center of the filter plate contains unfiltered materials, the original slurry contained in the materials cannot be discharged, and it is filtered at the same time. The filter cake still contains residual filtrate that cannot be removed. When the filter press pulls the filter plate to remove the filter cake, the filtrate contained in the feed hole of the filter plate falls with the filter cake at the same time, which adds moisture to the filtered filter cake. The unloaded filter cake does not reach the designed purity, and at the same time reduces the recovery rate of the filtrate, thus affecting the filtration efficiency

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