Diaphragm, filter plates, and filter press dehydrator

Abstract

Provided are a diaphragm which has a decreased chance of being damage, filter plates which are easily processed, and a filter press dehydrator upon which a filter chamber is formed by the diaphragm and the filter plates. The filter chamber (8) is formed by: the diaphragm (20) in which a thick section (21) that functions as a filter frame is integrally formed at the periphery of a thin section (22) that compresses an undiluted solution; and the filter plates, on side of which a compression section (31) that compresses the diaphragm (20) between adjacent filter plates is formed, and on the other side of which a rising section (37), into which the diaphragm (20) can be inserted, and the thickness of which is smaller than that of the thick section (21), is formed. By supplying the undiluted solution to the filter chamber (8) and inflating the diaphragm (20), the undiluted solution is compressed and dehydrated, producing a cake. In this case, the thick section (21) of the diaphragm (20) functions as a seal surface.

Description

technical field [0001] The invention relates to a diaphragm assembled in a filter press dehydrator, which supplies and squeezes raw liquid to a filter chamber divided by a filter frame and a filter plate. Background technique [0002] Conventionally, filter press dehydrators have been widely used as dehydrators for solid-liquid separation in product manufacturing processes such as carbon production and titanium production, and sludge treatment processes. [0003] The filter press dehydration mechanism is such that a filter chamber is formed between the side-by-side filter plates and diaphragms, the solid-liquid separation is performed through the filter cloth suspended in front of the filter plates and diaphragms, and the dehydration filter formed in the filter chamber is squeezed by the diaphragm. cake. [0004] Patent Document 1 proposes an example of a filter plate and a diaphragm used in such a filter press dehydrator. Such as Figure 12 As shown in (a), Patent Documen...

AI Technical Summary

Problems solved by technology

[0011] However, in the diaphragm 60 described above, repeated stress is generated in the movable part 65 every time the expansion and contraction of the diaphragm 60 are repeated in the extrusion process.

Since the movable part 65 is in contact with the filter plate 70, a large stress is concentrated, and wear occurs every time the extrusion dehydration operation is performed, so there are problems in that the durability deteriorates and the filter plate 70 is easily damaged.

As a result, there are problems in that the number of components increases and the number of manufacturing processes increases.

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