A device and method for heat treatment and dehydration of municipal sludge with low energy consumption

A dehydration device and sludge technology, which is applied in sludge treatment, water/sludge/sewage treatment, dehydration/drying/concentrated sludge treatment, etc., can solve the problems of high sludge treatment cost and lower water content, and achieve The effect of compact structure, less waste gas treatment, and small footprint

Active Publication Date: 2020-06-09
鸿灌环境技术有限公司
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Problems solved by technology

[0005] The present invention also provides a method for dehydrating sludge by using a sludge heat treatment dehydration device, using thermal wall breaking technology to destroy the structure of sludge, and combining with mechanical dehydration process, most of the water in sludge is mechanically separated Separation, followed by thermal drying to further reduce the moisture content, to solve the problem of high sludge treatment costs

Method used

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  • A device and method for heat treatment and dehydration of municipal sludge with low energy consumption
  • A device and method for heat treatment and dehydration of municipal sludge with low energy consumption

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Embodiment 1

[0023] Such as figure 1 As shown, the sludge heat treatment and dehydration device includes: a preheater 3 , a reaction kettle 4 , a flash tank 5 , a storage tank 6 , a centrifuge 7 , a drying machine 8 , and a deodorizing device 9 . The sludge first enters the preheater 3 through the screw pump 2, and at the same time, the tail gas 11 produced by drying is passed into the preheater 3. The tail gas evenly enters the preheater 3 through the gas distribution device. After the direct heat exchange between the sludge and the tail gas, the temperature of the dried tail gas decreases, the water vapor releases latent heat, and the temperature of the sludge rises. The preheater 3 has a jacket, and inside the jacket is steam condensed water from the reactor. The preheater 3 is equipped with a stirring device, which makes the temperature of the sludge uniform and reduces the viscosity of the sludge at the same time. In the preheater 3, after 20-30 minutes of reaction, the temperature ...

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Abstract

The invention discloses a low-energy-consumption municipal-sludge heat-treatment dewatering device and method and belongs to the technical field of sludge dewatering. The low-energy-consumption municipal-sludge heat-treatment dewatering device and method disclosed by the invention have the beneficial effects that the sludge heat-treatment dewatering device is applied to dewatering sludge, a heat wall-breaking technology is utilized to damage the structure of the sludge, simultaneously by combination of a mechanical dewatering process, a large amount of water in the sludge is removed by adopting a mechanical separation mode, and the water content is further reduced by heat drying in the following step, so that excessively-high cost and potential safety problems in sludge treatment are solved. The low-energy-consumption municipal-sludge heat-treatment dewatering device provided by the invention is compact in structure, small in occupied area, fast in treatment speed, energy-saving and environmentally friendly.

Description

technical field [0001] The invention relates to a low energy consumption municipal sludge heat treatment dehydration device and method, belonging to the technical field of sludge dehydration. Background technique [0002] Sludge is a solid waste produced in the process of sewage treatment. With the development of domestic sewage treatment, the total water treatment volume and treatment degree of sewage plants will continue to expand and improve, and the amount of sludge produced will also increase. In addition to a large amount of organic matter and rich nitrogen, phosphorus and other nutrients, sewage sludge also contains toxic and harmful components such as heavy metals, pathogenic bacteria and parasites. In order to prevent secondary pollution caused by sludge and ensure the normal operation and treatment effect of sewage treatment plants, the treatment and disposal of sewage sludge has become increasingly prominent in my country's sewage treatment. [0003] At present, ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C02F11/13C02F11/127
CPCC02F11/12C02F11/127
Inventor 秦艳涛吴玉清黄晖姚清
Owner 鸿灌环境技术有限公司
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