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Sludge pyrohydrolysis method and sludge pyrohydrolysis system

A thermal hydrolysis and sludge technology, applied in water/sludge/sewage treatment, sludge treatment, pyrolysis treatment of sludge, etc., can solve problems such as the utilization of difficult microorganisms, reduce digestion time and improve sludge treatment. The effect of efficiency

Inactive Publication Date: 2015-02-18
XIAN HUALU ENVIRONMENTAL PROTECTION EQUIP
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Problems solved by technology

However, most of the organic matter in sludge is cellular matter, which is difficult to be utilized by microorganisms.

Method used

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specific Embodiment

[0013] Specific embodiments: the sludge slurrying process is mainly carried out in the sludge slurrying tank, which is used to recover waste heat gas in the process of thermal hydrolysis and flash evaporation, preheat slurrying of raw sludge, and enhance the fluidity of sludge , to reduce the energy consumption of the thermal hydrolysis process, the pump stirring method is adopted, the temperature in the slurry tank is about 97 ℃, after the sludge from the slurry tank enters the thermal hydrolysis tank, saturated hot steam is introduced to make the sludge temperature Rapidly rise to 165 ~ 190 ℃. The thermal hydrolysis reaction of sludge occurs, and the macromolecules and large particles of organic matter are decomposed into small molecular organic matter. The tank adopts the intermittent method of sludge feeding, and the whole treatment process lasts for about 90 minutes. 15 minutes, the thermal hydrolysis reaction is about 30 minutes, and the exhaust is 15 minutes. By setting...

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Abstract

The invention relates to a sludge pyrohydrolysis method and a sludge pyrohydrolysis system, belongs to the field of treatment of a sewage plant, and particularly relates to the field of treatment of sludge of a sewage treatment product. To solve the problem that most of organic matters are not removed with an existing method, the invention provides the sludge pyrohydrolysis method and the sludge pyrohydrolysis system. The method comprises the processes of sludge slurrying, sludge pyrohydrolysis, sludge decompressed flash, sludge digestion, and centrifugal dewatering, wherein the process of sludge slurrying adopts a pump stirring mode, the temperature in a slurrying tank is kept at 97 DEG C; saturated steam heats a pyrohydrolysis tank to rapidly rise the temperature to be 165-190 DEG C in the process of sludge pyrohydrolysis, the pyrohydrolysis process lasts for 90 min, wherein the time for sludge charge is 15 min, the time for sludge discharge is 15 min, the steam is introduced for about 15 min, the pyrohydrolysis reaction is about 30 min, and the air is exhausted for 15 min; in the flash process, the pressure of a flash tank is kept at 0.1-0.3 MPa and the balance temperature is 102 DEG C; the time for sludge digestion is 15 days. The method and the system use the modes of pyrohydrolysis and flash, the organic matters in the sludge are effectively removed, meanwhile, the time for sludge digestion is shortened, and the sludge treatment efficiency is improved.

Description

technical field [0001] The invention belongs to the field of sewage treatment, in particular to the field of sludge treatment of sewage treatment products. Background technique [0002] With the continuous improvement of the level of urbanization in our country and the rapid development of sewage treatment facilities, a large amount of excess sludge will be produced in the process of urban sewage treatment. The situation of sludge treatment is very severe. To achieve the reduction, harmlessness and recycling of sludge economically and effectively has become an important issue for me. [0003] At present, the common treatment method is mesophilic anaerobic digestion. On the one hand, it can reduce the weight and volume of sludge, and on the other hand, it can recover the biomass energy in the sludge in the form of biogas. However, most of the organic matter in sludge is cellular matter, which is difficult to be utilized by microorganisms. Contents of the invention [0004...

Claims

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Application Information

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IPC IPC(8): C02F11/00C02F11/10
CPCC02F11/00C02F11/10C02F2303/06
Inventor 陆强
Owner XIAN HUALU ENVIRONMENTAL PROTECTION EQUIP
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