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Method and device for rapidly reducing moisture content of sludge

A treatment method and water content technology, which is applied in the directions of dehydration/drying/thickened sludge treatment, pyrolysis treatment sludge, by-product vaporization, etc., can solve the difficulty of large-scale production, high risk of secondary pollution, and effectively kill problems such as extinction, to achieve the effects of easy large-scale treatment, making up for the long disposal cycle, and reducing secondary pollution

Inactive Publication Date: 2011-11-09
安徽合协生态环境科技有限公司
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  • Application Information

AI Technical Summary

Problems solved by technology

[0013] However, the above methods are only for the purpose of unilaterally reducing the moisture content of the sludge, the technical requirements are harsh, the large-scale production is difficult, and the process cannot be effectively guaranteed
Moreover, the above method has a high risk of secondary pollution, high energy consumption, long treatment time, and low disposal guarantee rate. The more prominent deficiency is that each process cannot completely and effectively kill the pathogenic bacteria, microorganisms and roundworm eggs existing in the sludge. Difficult to achieve harmless disposal

Method used

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  • Method and device for rapidly reducing moisture content of sludge
  • Method and device for rapidly reducing moisture content of sludge
  • Method and device for rapidly reducing moisture content of sludge

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Effect test

Embodiment 1

[0040] 1. First, import 2 tons of excess sludge from the sewage treatment plant into the slurry reactor for chemical catalytic hydrolysis, introduce inorganic acid sulfuric acid through the guide pipe, control the pH 5-6, control the reaction temperature (76°C-82°C), flash Steam exhausted steam back-mixing preheating pulping, steam and mechanical co-stirring, chemical catalytic hydrolysis reaction, in the pulping reactor, organic matter is hydrolyzed by atmospheric pressure steam, and a large amount of organic acids, such as oxalic acid and lignin are produced.

[0041] 2. Carry out the hydrolysis and cracking reaction of high temperature and high pressure hydrothermal dehydration, input inorganic acid catalyst (such as sulfuric acid) from the catalyst storage tank and the generated pulped sludge and organic acid into the unreacted hydrolysis tank, from the sub-cylinder to the hydrolysis reaction Steam is input into the kettle for hydrothermal dehydration. The reaction temperat...

Embodiment 2

[0045] A device for rapidly reducing the moisture content of sludge, comprising: a catalyst tank for disposing catalysts, and a slurry reactor connected to the catalyst tank and reacting with imported sludge;

[0046] A high-temperature and high-pressure hydrolysis tank that is connected to the slurry reactor, the catalyst tank and the sub-cylinder respectively to allow the sludge organic matter to undergo a chemical catalytic cracking reaction to generate small molecular carbides and nitrides;

[0047] The high-temperature and high-pressure hydrolysis tank is connected to a pressure relief tank for pressure relief and exhaust; the pressure relief tank is connected to a pair of sedimentation tanks for hydrolyzed sludge for sedimentation and separation to generate solid materials and supernatant.

[0048] The pressure relief tank is also connected to a pulping reactor through a waste heat economizer connected in the middle. In the pulping reactor, organic matter is hydrolyzed wi...

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Abstract

The invention provides a rapid, economic and harmless processing method and device for reducing moisture content of sludge. In the invention, hydrolysis by atmospheric steam, hydrothermal dehydration at high temperature and high pressure and solid-liquid separation on materials are carried out to obtain a solid-liquid slurry, high moisture content of 80% can be reduced to low moisture content of 40%, and a hydrothermal separation process in sludge treatment can be rapidly achieved. The form of an organic matter in the sludge is changed, and phase change of water in the sludge can not be caused; compared with the prior art, the method provided by the invention can be used for overcoming the defects that the processing period is long and the processing energy consumption is high, and is easy for realization of large-scale processing and contributes to reducing secondary pollution to the environment and recycling resources; and a new approach is found for processing the sludge.

Description

technical field [0001] The invention relates to the field of solid waste treatment, in particular to a rapid hydrolysis treatment method and device for reducing the water content of urban sewage sludge and making the sludge harmless. Background technique [0002] Along with the sewage treatment process of the sewage treatment plant, a large amount of sludge is produced. For a long time, my country has tended to focus on sewage treatment and light sludge treatment. At present, my country's sludge treatment process has problems such as single technology, backward equipment level, low disposal guarantee rate, and high risk of secondary pollution. In addition, the existing sludge treatment process still has the disadvantages of high cost and long time. [0003] According to statistics, at present, urban sewage treatment plants in the country produce about 1.8 million tons of dry sludge (equivalent to 9 million tons of sludge with 80% water content) every year, and increase at ...

Claims

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Application Information

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IPC IPC(8): C02F11/10C02F11/12C02F11/14
CPCY02W10/40
Inventor 朱仁发
Owner 安徽合协生态环境科技有限公司
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