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Filling material duty cycle operation method for auxiliary sludge dewatering

A technology for sludge dehydration and sludge, applied in separation methods, chemical instruments and methods, filtration and separation, etc., to achieve the effects of improving compression resistance, easier guarantee of supply, high economy and practicability

Active Publication Date: 2010-12-29
ZHEJIANG HUAZHANG TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Therefore, there are certain limitations in the popularization and application of the sludge dehydration method in actual production.

Method used

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  • Filling material duty cycle operation method for auxiliary sludge dewatering
  • Filling material duty cycle operation method for auxiliary sludge dewatering
  • Filling material duty cycle operation method for auxiliary sludge dewatering

Examples

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Embodiment Construction

[0020] The present invention will be further described below by means of embodiments in conjunction with the accompanying drawings.

[0021] see figure 1 , Example The process flow of the filler recycling method for assisting sludge dewatering includes filler and sludge mixing step I, pressing dehydration step II and filler recovery step III.

[0022] Filler and sludge mixing step I adopts two mixing methods: external mixing I-1 and internal mixing I-2. After concentration and dehydration, the sludge with a water content of 70-85% is mixed with a sludge weight of 2-2 50% filler, the amount of filler mixed depends on the sludge composition and water content control and adjustment. The filler is a solid material in the form of strips or granules or lumps or rounds, or inelastic or elastic materials that are knotted and bonded together. The inelastic material can be a plastic sheet, and the elastic material can be a knotted filter cloth. Or rubber or sponge. The filler materia...

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Abstract

The invention discloses a method for making a filler be recycling-used, and the filler assists sludge to be dehydrated. The method comprises a procedure of mixing a filler and sludge, a procedure of pressing and dehydrating and a procedure of recovering the filler. Wherein, the filler and the sludge are mixed by the methods of mixing outside the machine and mixing inside the machine. The method of mixing outside the machine means that the concentrated and dehydrated sludge is mixed with the filler before the sludge enters into a pressing and filtering equipment. The method of mixing inside the machine means that when the sludge enters into the pressing and filtering equipment to be pressed and dehydrated, the filler is evenly spread on a filtering medium so that a filler layer, which can increase the friction force of pressing and dehydrating the sludge, is formed between the sludge and the filtering medium. Recovering the filler means that the filler is separated from the sludge which is output from the pressing and filtering equipment and is mixed with the filler, and the filler is sent back to the procedure of mixing the filler and the sludge to be recycling used. The method has the advantages that the filler and the sludge are directly mixed and spread on the filtering medium, so the friction force of the sticky sludge is increased, thereby preventing the sludge from running away and improving the production efficiency of pressing and dehydration; and the filler is recycling used, so the operation cost is reduced. Thus, the method has higher economic and practical value.

Description

technical field [0001] The invention relates to a method for using a filler in a sludge dewatering process, in particular to a method for recycling a filler for assisting sludge dewatering, which is used for dehydrating concentrated and filtered sludge, and is especially suitable for dehydrating and treating viscous sludge. Background technique [0002] Viscous sludge with high organic matter content and high moisture content is prone to mud running and poor feeding during the dehydration process of the belt filter press, which leads to the belt filter press not being able to work continuously and stably, making the press The output of the dehydration equipment is affected and the production efficiency is reduced. The Chinese patent application 200810060562.X "A Sludge Barren Dewatering Method" submitted by the applicant discloses a sludge barren dewatering method suitable for pressing and dewatering sticky sludge. In this barren dehydration method, before the sludge is pre...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B01D33/04
Inventor 唐志超胡杭滨李小整余真德
Owner ZHEJIANG HUAZHANG TECH
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