Method for treatment and comprehensive utilization of sludge based on thermal hydrolysis and application of method

A technology of thermal hydrolysis and sludge, applied in water/sludge/sewage treatment, sludge treatment, sludge treatment, etc., can solve the problems of low treatment efficiency, high equipment cost, and long time consumption, and reduce equipment investment , simple process and reduced steam consumption

Active Publication Date: 2015-04-01
SHENZHEN ECO SOLUTION TECH CORP
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] The technical problem to be solved by the present invention is to provide a sludge treatment method with low energy consumption, short time consumption and high treatment efficiency for the defects of large energy consumption, long time consumption, low treatment efficiency and high equipment cost in the prior art. Comprehensive sludge treatment method based on thermal hydrolysis with high cost and low equipment cost

Method used

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  • Method for treatment and comprehensive utilization of sludge based on thermal hydrolysis and application of method
  • Method for treatment and comprehensive utilization of sludge based on thermal hydrolysis and application of method
  • Method for treatment and comprehensive utilization of sludge based on thermal hydrolysis and application of method

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Effect test

Embodiment 1

[0034] Such as figure 2 As shown, inject the sludge with a moisture content of 75-80% into the reactor, close the feed port of the reactor, and start the stirring device in the reactor; inject 1.5-1.7MPa sludge from the upper part of the reactor from the steam boiler Saturated steam, heat the sludge in the reactor; detect the real-time temperature of the sludge in the lower part of the reactor, when the temperature of the sludge reaches 185°C, stop injecting saturated steam and keep it for 10-15 minutes; then open the pressure relief valve and start to discharge When the pressure in the reactor drops below 0.05MPa, the discharge valve is opened to discharge the mud obtained by thermal hydrolysis; after the mud is cooled, it undergoes anaerobic digestion to generate biogas; the biogas residue generated during biogas production enters the pressure After mechanical dehydration, a dehydrated cake with a moisture content of 40-45% is obtained. At this point, the comprehensive tre...

Embodiment 2

[0036] Such as image 3As shown, inject the sludge with a moisture content of 80-85% into the reactor, close the feed port of the reactor, and start the stirring device in the reactor; inject 1.8- 2.0MPa saturated steam to heat the sludge in the reactor; detect the real-time temperature of the sludge in the middle of the reactor, when the temperature of the sludge reaches 170°C, stop injecting saturated steam and keep it for 15-20 minutes; then open the pressure relief The valve starts to exhaust steam and relieve pressure. When the pressure in the reactor drops below 0.05MPa, open the discharge valve to discharge the mud obtained by thermal hydrolysis treatment; after the mud is cooled, it will undergo anaerobic digestion to generate biogas, and the generated biogas will be used It is used to heat the steam boiler; the biogas residue generated during biogas production enters the filter press, and after mechanical dehydration, a dehydrated cake with a moisture content of 40-45...

Embodiment 3

[0038] Inject the sludge with a water content of 85-90% into the reactor, start the stirring device in the reactor at the same time, close the feed port of the reactor; inject 2.1-2.3MPa saturated steam from the upper part of the reactor into it from the steam boiler, Heat the sludge in the reactor; detect the real-time temperature of the sludge in the lower part of the reactor, and when the temperature of the sludge reaches 165°C, stop injecting saturated steam and keep it for 5-10 minutes; then open the pressure relief valve to start steam and pressure relief , when the pressure in the reactor drops below 0.05MPa, open the discharge valve to discharge the mud obtained by thermal hydrolysis; after the mud is cooled, it undergoes anaerobic digestion to generate biogas; the biogas residue generated during biogas production enters the filter press, After mechanical dehydration, a dehydrated cake with a moisture content of 43-48% is obtained. At this point, the comprehensive trea...

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Abstract

The invention belongs to the technical field of sludge treatment, and discloses a method for treatment and comprehensive utilization of sludge based on thermal hydrolysis and an application of the method. The method comprises the following steps of: injecting sludge with the water content of 75-90% into a reaction kettle, then injecting saturated steam with the pressure of 1.5-2.5MPa into a thermal hydrolysis reactor, stopping injecting the saturated steam when the temperature of the sludge reaches 150-185 DEG C, and maintaining the situation for 0 to 25 minutes, thus obtaining slurry subjected to thermal hydrolysis; and performing anaerobic digestion reaction on the slurry to prepare a marsh gas. According to the method, the thermal hydrolysis treatment temperature is relatively low, so that the time for heating the sludge and the total treatment time by using the treatment method can be significantly shortened, the treatment efficiency can be improved, and the energy consumption is reduced and the cost is reduced. The marsh gas prepared by the method can be reused as a fuel for a steam boiler system or can be sold, and the purchased energy sources required by sludge treatment are reduced when the marsh gas is used as the fuel for steam boilers in the system, so that the treatment cost is reduced, the economic benefit is improved, and the reduction, harmlessness and recycling of the sludge are realized.

Description

technical field [0001] The invention belongs to the technical field of sludge treatment and relates to a sludge treatment method. More specifically, the present invention relates to a thermal hydrolysis-based sludge treatment and comprehensive utilization method and its application. Background technique [0002] Dewatered sludge is the main by-product produced in the sewage treatment process. It not only contains rich water, organic matter and microorganisms, but also contains many harmful substances such as heavy metals that can cause environmental pollution. Therefore, improper treatment of sludge is likely to cause secondary pollution. secondary environmental pollution. In order to avoid the occurrence of the above problems, some sludge treatment methods and devices have been developed successively, in order to reduce the content of harmful substances in the sludge and to recycle it through sludge treatment. Among them, the sludge treatment technology including thermal ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C02F11/00C02F11/10C02F11/04C02F11/12C05F7/00C09K17/40B09B3/00
CPCY02E50/343Y02A40/20Y02E50/30Y02W10/20Y02W30/40
Inventor 黄彤宇
Owner SHENZHEN ECO SOLUTION TECH CORP
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