Filter press dehydrator

Abstract

Provided is a filter press dehydrator which enables a dehydrated cake to be attached to only a filter cloth on either a filter plate side or a diaphragm side, and which enables the dehydrated cake to be easily separated from the filter cloth. The filter press dehydrator is configured in such a manner that the gap size of a drainage channel (25) formed on a diaphragm (20) is larger than the gap size of a drainage channel (32a) formed on a filter plate (30). The filter press dehydrator is further configured in such a manner that, with the filter plates (20) and diaphragms (20) separated, among filter cloths (9a, 9b) that are capable of moving either upward or downward, the filter cloth (9a) on the diaphragm (20) side moves downward, and the other filter cloth (9b) moves upward. Thus, a cake (19) easily attaches to the filter cloth (9a) on the diaphragm (20) side, and the attachment of the cake (19) to the other filter cloth (9b) can easily be suppressed, and when the filter cloth (9a) on the side on which the cake (19) is attached is made to move in a downward direction, the filter cloth (9a) folds back due to the bottom rollers (8), enabling the cake (19) to easily be separated and to fall.

Description

technical field [0001] The present invention relates to a filter press dehydrator in which a filter plate and a diaphragm are oppositely arranged with a pair of filter cloths interposed therebetween, and raw liquid is supplied to and squeezed into a filter chamber formed between the pair of filter cloths. Background technique [0002] In the past, it was used as the treatment process of various sludge generated in washing plants, excrement treatment plants, urban sewage treatment plants, industrial wastewater treatment plants, etc., and in various manufacturing processes of carbon products and titanium products in production equipment. The dehydrator used for solid-liquid separation is widely used filter press dehydrator. [0003] Such as Figure 13 As shown, a filter press dehydrator is proposed in Patent Document 1: a plurality of filter chambers 85 with a pair of filter cloths 83, 84 arranged between filter plates 81, 82 are arranged in parallel, and the stock solution is...

AI Technical Summary

Problems solved by technology

[0008] However, the above-mentioned conventional filter press dehydrator has the following problems: after solid-liquid separation, the dehydrated filter cake adheres to the filter cloth on the filter plate side and the filter cloth on both sides of the diaphragm side, and after the filter plate is separated, the dehydrated filter cake cannot be easily removed from the filter cloth. If the cloth peels off and the residue of the dehydrated filter cake remains on the surface of the filter cloth, the filter cloth will be clogged prematurely, and the filter cloth should be replaced frequently

[0009] In order to eliminate clogging of the filter holes of such a filter cloth, it is conceivable to provide a vibration mechanism that vibrates the filter cloth, and the dehydrated filter cake falls from the filter cloth by vibration, but the manufacturing cost of the filter press dehydrator becomes high due to the installation of the vibration mechanism.

[0010] In addition, it is conceivable that the operator manually peels and drops the dehydrated filter cake attached to the filter cloth, but this is very troublesome.

[0011] Therefore, it is conceivable that the scraper is arranged on the surface of the filter cloth, and the dehydrated filter cake attached to the surface of the filter cloth is peeled off and dropped by moving the filter cloth. Which side, so if there is no scraper for the filter cloth on both sides of the filter plate side and the diaphragm side, the dehydrated filter cake attached to the surface of the filter cloth cannot be peeled off and dropped

In addition, in order to reliably peel off the dehydrated filter cake, the scraper must be brought into contact with the surface of the filter cloth, which may damage the surface of the filter cloth.

Images