Anhydration system for sludge by using remaining heat of flue gas from steam power plant

A technology of sludge drying and flue gas waste heat, which is applied in the direction of sludge treatment through temperature control, dehydration/drying/thickened sludge treatment, etc., which can solve the problems of large energy consumption, high cost of sludge drying, and high cost

Active Publication Date: 2005-10-26
ZHEJIANG UNIV
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Problems solved by technology

Practice shows that sludge drying is a necessary process to realize the harmless, reduction and resourceful treatment of sludge in sewage treatment plants. The sludge generated from sewage treatment plants is dehydrated mechanically, and the moisture content is generally 75%-85% %, through the drying process, if the moisture content of the sludge is reduced to below 20%, it will consume a lot of energy, making the cost of sludge drying higher, so that the sludge is harmless, reduced and Resource processing is difficult to implement
We have reduced the cost of sludge drying to the lowest level by establishing a sludge drying system that utilizes the waste heat of flue gas from thermal power plants, thus overcoming the high cost of traditional sludge drying and the difficulty in implementing sludge harmless and reducing sludge. Bottlenecks in Quantization and Resource Processing

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  • Anhydration system for sludge by using remaining heat of flue gas from steam power plant

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Embodiment Construction

[0010] The sludge drying system using the waste heat of flue gas in thermal power plants has a heating system, a sludge pretreatment system, a feeding system, a sludge drying and granulation system, and a dust removal and gas removal system. The heating system has a first induced draft fan 1, which sends the flue gas that passes through the electrostatic precipitator at 100-150°C through the flue 2, and the flue gas volume is controlled by the damper 3, and is sent to the first rotary drying kiln 11 and the second rotary drying kiln respectively. Drying kiln 12; The sludge pretreatment system has a trough-type sludge dump 27, and a mixer 28 is provided on the trough-type sludge dump; the feeding system has a mobile pressure pump 4, which is sequentially connected with the homogenizer machine 5, fixed pressure pump 6, extruder 7, powder coating machine 8, the first bucket belt elevator 9 and the first feed port 10 are connected; the sludge drying and granulation system has the f...

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Abstract

The present invention discloses a sludge anhydration system by utilizing waste heat of steam power plant smoke. Said sludge anhydration system includes heat supply system, sludge pretreatment system, feeding system, sludge, anhydration and granulation system and dust-removing and gas-removing system.

Description

technical field [0001] The invention relates to a sludge drying system utilizing the waste heat of flue gas in a thermal power plant. Background technique [0002] In order to protect the living environment of human beings, urban domestic sewage and industrial wastewater must be treated by sewage treatment plants and discharged only after meeting the national sewage discharge standards. This will not only prevent the water environment from being polluted, but also enable water resources to be recycled. [0003] The urban sewage treatment system includes two parts: sewage treatment and sludge treatment. my country's treatment technology for urban domestic sewage and industrial wastewater mainly adopts imported technology from abroad. Most of the pollutants are transferred to the sludge, which determines that the sludge produced by the sewage treatment plant has a large amount and is enriched with high concentrations of pollutants and heavy metals. However, since there is no e...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C02F11/12
Inventor 翁焕新苏闽华
Owner ZHEJIANG UNIV
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