Filter press dehydration system and method

Abstract

The invention discloses a filter press dehydration system and method, the filter press dehydration system comprises a filter press, the filter press comprises a plurality of filter plates and filter cloth, a first chamber for accommodating a solid medium to form a filter cake can be formed between adjacent filter plates, and each filter plate is provided with a liquid inlet hole for allowing a suspension to enter the first chamber and a liquid outlet hole for allowing a filtrate to flow out of the first chamber; the filter plate comprises a core plate and two membranes located on the two sides of the core plate respectively, a second chamber is formed between the core plate and the membranes, and a first channel and a second channel which are communicated with the second chamber are formed in the core plate; an extrusion dehydration assembly is used for physically extruding the filter cake in the first chamber; and a negative pressure dehydration assembly is used for forming negative pressure in the first chamber, and the negative pressure dehydration assembly is communicated with the liquid outlet hole. According to the arrangement, after preliminary filtration is carried out through the filter cloth of the filter press, the extrusion dehydration assembly and the negative pressure dehydration assembly are comprehensively utilized to further discharge water, so that the water content is reduced, and the dehydration effect is enhanced.

Description

technical field [0001] The invention relates to the technical field of dehydration, in particular to a filter press dehydration system and a dehydration method. Background technique [0002] Filter press is an industrial equipment used for solid-liquid separation. It is the main dehydration equipment in the field of environmental protection applications, and it is also an important filtration equipment in industries such as minerals and processing, chemical industry, food and biomedicine. The filter press consists of multiple filter plates arranged side by side, which can form several interpenetrating closed chambers through external force compression. When using a filter press for filtration and dehydration, a positive pressure (generally 0.3-2Mpa) is formed in the chamber through the feed pump to make the water discharge after passing through the filter plate and filter cloth, and the material that has lost a certain amount of water forms a filter cake in the chamber, and ...

AI Technical Summary

Problems solved by technology

The above process is mainly realized by the filtering effect of the filter plate, the water content of the filter cake is still high, and the effect of dehydration by the filter press is poor

[0003] Therefore, how to solve the problem of high moisture content in the filter cake and poor dehydration effect in the prior art when using a filter press for dehydration has become an important technical problem to be solved by those skilled in the art.

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