Regulation method for high-dryness dehydration of sludge

A sludge and high dry technology, applied in the field of environmental engineering, can solve the problems of poor dewatering performance, uneven stirring affecting conditioning effect and dewatering effect, etc., and achieve the effects of prolonging service life, good stirring effect and simple addition process.

Active Publication Date: 2014-07-02
江苏道科环境科技有限公司
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Problems solved by technology

[0005] The present invention aims at the problems of direct mechanical dehydration of sludge in the prior art, poor dehydration performance, uneven stirring after adding conditioner, affecting conditioning effect and dehydration effect, etc., and provides a method that can mix sludge and conditioner evenly and significantly Conditioning System for Improving Sludge Mechanical Dewatering Performance

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  • Regulation method for high-dryness dehydration of sludge

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Embodiment Construction

[0013] The technical solutions of the present invention will be further described through specific embodiments below in conjunction with the accompanying drawings.

[0014] like figure 1 as shown, figure 1 It is a flow chart of the conditioning system of the present invention.

[0015] This embodiment takes a conditioning pool as an example. The sludge in the sludge digestion tank is fed into the conditioning tank by gravity or a sludge pump. The sludge feeding time is about 30 minutes. The initial liquid level of the conditioning tank is 0m. When the sludge is fed to the liquid level of 1m, the mixer starts to stir. Then continue to feed the mud, and when the liquid level reaches 3.2m, stop feeding the mud, and the mixer is always in the stirring state. Then ferric chloride dosing pump is opened, and starts to add ferric chloride solution, and ferric chloride content is 38% in the solution, and optimum addition is 4% of sludge absolute dry weight, stirs 15min after adding,...

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Abstract

The invention discloses a regulation method for high-dryness dehydration of sludge. The method comprises the following steps: sludge in a sludge digestion tank is conveyed to a sludge regulation pool through the gravity action or by a conveying pump, then a ferric chloride solution and quick lime are added into the regulation pool by virtue of a chemicals feeding pump, a mixer is used for mixing through sensing the liquid level, and sludge is fed into a plate and frame filter press from the regulation pool after the regulation is over. The method is a regulation method, based on which sludge and conditioners are mixed uniformly and the sludge mechanical dehydration performance is remarkably improved.

Description

technical field [0001] The invention relates to a conditioning agent and a conditioning system for high-dry dehydration of urban sludge, belonging to the field of environmental engineering. Background technique [0002] By the end of 2011, a total of 3,135 urban sewage treatment plants had been built in cities and counties in my country, with a sewage treatment capacity of 136 million m 3 d －1 , produces nearly 22 million tons of dewatered sludge (80% water content) annually. Since the urban sludge in our country is mainly the residual sludge discharged from the secondary biochemical treatment of the sewage treatment plant or the mixed sludge mixed with the primary sedimentation tank, it has high organic matter content, strong hydrophilicity, and uneven particle size distribution. Therefore, the mechanical dehydration is performed directly, and its dehydration performance is very poor, which brings many problems to its handling and operation. [0003] At present, there ar...

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C02F11/14
Inventor 陶先兵赵金君钱金汤伟江姝瑶程花
Owner 江苏道科环境科技有限公司
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