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Sludge treatment system and method

A sludge treatment and treatment system technology, applied in the direction of sludge treatment, water/sludge/sewage treatment, oxidation treatment of sludge, etc., can solve the problem of large equipment footprint, small sludge reduction, large resource consumption, etc. problems, to achieve the effect of saving operating costs, reducing energy, and reducing energy input

Active Publication Date: 2016-06-08
北京首创大气环境科技股份有限公司
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  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0014] The purpose of the present invention is to propose a sludge treatment system and treatment method to solve the problems of large resource consumption, low treatment efficiency, small sludge reduction, and large equipment footprint in the existing sludge treatment process

Method used

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  • Sludge treatment system and method

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Embodiment 1

[0041] The present invention proposes a sludge treatment system, which includes a pretreatment unit 1, a heat exchange unit 2, an oxidation matrix unit 3, a reactor 4 and a separation unit 5, and the reactor 4 is connected to the heat exchange unit 2, The oxidation matrix unit 3 and the separation unit 5 are connected, and the pretreatment unit 1 is connected with the heat exchange unit 2 and the separation unit 5 respectively.

[0042] The pretreatment unit 1 includes a sludge storage tank 6 for storing sludge, a preprocessor 7 connected to the sludge storage tank 6, a solid pump for transporting sludge, and a mixer.

[0043]In the pretreatment unit 1, the sludge with a water content of 75% to 85% in the sludge storage tank 6 is injected into the preprocessor 7 with a solid pump, and is mixed with the liquid phase of the separation unit 5 in the preprocessor 7. Mix backflow water to make a material with a moisture content of 90%. The liquid-phase circulating water is acidic...

Embodiment 2

[0064] Another object of the present invention is to provide a kind of sludge treatment method, described treatment method comprises the steps:

[0065] A. The sludge stored in the sludge storage tank 6 is injected into the preprocessor 7 by a solid pump, and mixed with the liquid-phase return water of the separation unit 5 in the preprocessor 7 to form a material with a water content of 90%. In the sludge storage tank 6, the sludge with a water content of 75% to 85% is mixed with the liquid-phase backflow water to form a material with a water content of 90%. The liquid-phase circulating water is acidic with a pH of 4 to 5. Under the action of acid, the sludge will break down, causing some cells to dissolve and free water to increase. Moreover, due to the high temperature of the return water, the original sludge will be preheated. . Under the synergy of these aspects, the fluidity of the mixed sludge in the pretreatment unit 1 is enhanced.

[0066] Preferably, in step A, the...

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Abstract

The invention relates to a sludge treatment system and method, cell wall of cells in sludge is broken by high temperature and pressure, and cell water in the cells is removed, so that subsequent solid-liquid separation is easier. More importantly, by use of the principle of hydrothermal oxidation, organic matters in the sludge are oxidized in a liquid phase, high temperature and high pressure environment needed for the reaction is maintained by released heat, an efficient heat exchanger is used for preheating a starting material with a reacted material, a closed heat exchanger structure is used, heat loss, caused for the reason that a lot of water vapor is taken away by direct discharge of a gas, can be avoided, the generation of vapor is reduced, water phase change heat consumption energy is reduced, energy investment is reduced, and operating cost is saved.

Description

technical field [0001] The invention relates to the field of sludge treatment, in particular to a sludge treatment system and treatment method. Background technique [0002] Since entering the "Eleventh Five-Year Plan", my country's sewage treatment industry has developed rapidly, and the sewage treatment capacity and treatment rate have increased rapidly, which has brought about a rapid increase in sludge production. According to the data of the Ministry of Housing and Urban-Rural Development, by the end of 2009, the national urban sewage treatment volume reached 28 billion cubic meters, and the production of wet sludge (with a moisture content of 80%) exceeded 20 million tons. According to the survey results, 80% of the sludge produced by my country's sewage treatment plants has not been properly treated, and the random accumulation of sludge and the pollution and re-pollution problems caused by it have become prominent and have aroused social concern. [0003] There are ...

Claims

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Application Information

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IPC IPC(8): C02F11/00C02F11/06
Inventor 郑向军武晓剑王薇张平敏朱贵徽薛峰李婷
Owner 北京首创大气环境科技股份有限公司
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