Low water consumption sludge treatment system and method

A technology for sludge treatment and low water consumption, applied in water/sludge/sewage treatment, sludge treatment, dehydration/drying/thickened sludge treatment, etc. Consumption and other problems, to save water resources, save operating costs, reduce the effect of steam generation

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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  • Summary
  • Abstract
  • 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 with low water consumption for the problems of high water consumption, low treatment efficiency and small sludge reduction in sludge treatment

Method used

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  • Low water consumption sludge treatment system and method

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Effect test

Embodiment 1

[0041] The present invention proposes a sludge treatment system with low water consumption. The treatment system includes a pretreatment unit 1, a heat exchange unit 2, an oxidation substrate unit 3, a reactor 4, a separation unit 5, and a regulating tank 6. The reactor 4 are respectively connected with the heat exchange unit 2, the oxidation substrate unit 3 and the separation unit 5, the pretreatment unit 1 is respectively connected with the heat exchange unit 2, the separation unit 5, and the separation unit 5 is connected with the adjustment tank 6.

[0042] The pretreatment unit 1 includes a sludge storage tank 7 for storing sludge, a preprocessor 8 connected to the sludge storage tank 7, 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 7 is injected into the preprocessor 8 with a solid pump, and the liquid phase of the separation unit 5 is returned to the prepro...

Embodiment 2

[0066] The present invention also provides a sludge treatment method with low water consumption, said treatment method comprising the steps of:

[0067] A. The sludge stored in the sludge storage tank 7 is injected into the preprocessor 8 by a solid pump, and mixed with the liquid-phase reflux water of the separation unit 5 in the preprocessor 8 to form a material with a water content of 90%. In the sludge storage tank 7, 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.

[0068] Preferably, in step A, the...

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Abstract

The present invention relates to a low water consumption sludge treatment system and method, an efficient heat exchanger is used for preheating a starting material with a reacted material, a closed heat exchanger structure is used,the low water consumption sludge treatment system can prevent a lot of water vapor from being taken away during direct discharge of a gas, the loss of water is reduced, the generation of vapor is reduced, water phase change heat consumption energy is reduced, energy investment is reduced, and operating cost is saved. Further, by heat transfer of the gas, the loss of water entrained by high temperature is effectively reduced, and defogging arrangement in gas-liquid separation can effectively reduce the loss of the water vapor. At the same time, by adding of a conditioning tank, the water is further treated, and by adding of a base, most of heavy metals form complex precipitates, so that the water can be returned directly to a wastewater treatment plant for reuse, water sources are saved, and the operation cost of the system is reduced.

Description

technical field [0001] The invention relates to the field of sludge treatment, in particular to a sludge treatment system and treatment method with low water consumption. 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 co...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C02F11/00C02F11/06C02F11/12
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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