Alkali adding catalytic thermal hydrolysis treatment method for sludge

A treatment method and alkali catalysis technology are applied in the field of sludge addition alkali catalytic thermal hydrolysis treatment, which can solve the problems of difficult sludge increase, difficult separation and hydrolysis of organic matter and bound water, etc., so as to improve the sludge hydrolysis efficiency, steam The effect of lower usage and lower investment

Inactive Publication Date: 2012-10-10
SHENZHEN ECO SOLUTION TECH CORP
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Problems solved by technology

At present, the vast majority of sewage treatment plants use the activated sludge process to treat sewage. The activated sludge metabolized becomes sludge after sewage treatment. Therefore, municipal sludge is composed of a large number of cellular o

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  • Alkali adding catalytic thermal hydrolysis treatment method for sludge

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Embodiment Construction

[0020] Such as figure 1 As shown, the present invention discloses a method for treating sludge with alkali-catalyzed thermal hydrolysis. In step S1, the sludge and alkaline substances are injected into the reaction kettle, and the pH value of the sludge in the reaction kettle is controlled to be 10 to 14 ; In step S2, inject saturated steam of 0.5 Mpa to 1.6 Mpa into the reactor, and obtain hydrolyzed sludge after 15 to 60 minutes of reaction.

[0021] In step S1, the water content of the sludge injected into the reactor may be 70% to 90%, or the water content of the sludge injected into the reactor is 75% to 85%.

[0022] As an embodiment of the present invention, in step S2, saturated steam of 1.0 Mpa to 1.5 Mpa is injected into the reactor, or saturated steam of 1.2 Mpa to 1.4 Mpa is injected into the reactor.

[0023] As another embodiment of the present invention, in the step S2, the temperature of the sludge in the reactor reaches 150 to 190 degrees Celsius; in the step...

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Abstract

The invention provides an alkali adding catalytic thermal hydrolysis treatment method for sludge. The method comprises the following steps of: A, injecting the sludge and an alkali substance into a reaction kettle, and controlling the pH value of the sludge in the reaction kettle to be 10-14; and B, injecting saturated steam of 0.5 to 1.6MPa into the reaction kettle, and reacting for 15 to 60 minutes to obtain hydrolyzed sludge. The method has the advantages that the hydrolysis efficiency of the sludge is improved by adopting a method of adding the alkali substance into the sludge, and quick crushing of sludge cells and quick hydrolysis of organic substances are facilitated in an alkali environment and under a heating condition. Because the hydrolysis efficiency of the sludge is improved by adding the alkali substance into the sludge, the saturated steam of 0.5 to 1.6MPa can be injected into the reaction kettle; the pressure of the saturated steam declines, so that the design pressure of the reaction kettle declines, and the investment cost is greatly reduced; because the pressure of the saturated steam declines, the investment for matched equipment such as a boiler is greatly reduced; and the consumption of the steam declines, so that the energy consumption is reduced, and the operating cost for treating the sludge is greatly reduces.

Description

technical field [0001] The invention relates to a sludge treatment method, in particular to a sludge addition alkali-catalyzed thermal hydrolysis treatment method. Background technique [0002] Now with the development of urbanization, a large amount of municipal sludge is produced every day, which puts great pressure on the environment and sustainable development. To achieve the reduction, harmlessness and resource utilization of sludge, new processes and new technologies must be adopted to solve the problem. . At present, the vast majority of sewage treatment plants use the activated sludge process to treat sewage. The activated sludge metabolized becomes sludge after sewage treatment. Therefore, municipal sludge is composed of a large number of cellular organic matter. These cells are Protected by the cell walls of sugar components such as cellulose and peptidoglycan, the organic matter and bound water in the cells are not easily separated and hydrolyzed, which makes it ...

Claims

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Application Information

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IPC IPC(8): C02F11/10
Inventor 陈剑波陈佳彬
Owner SHENZHEN ECO SOLUTION TECH CORP
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