A sludge drying and incineration system relying on thermal power plants

A technology for sludge drying and thermal power plants, applied in dewatering/drying/concentrating sludge treatment, incinerators, combustion methods, etc., which can solve problems such as high cost, inability to meet the moisture content requirements of sludge incineration, and achieve low initial investment. , The effect of saving exhaust steam treatment investment and cost

Active Publication Date: 2017-02-22
ELECTRIC POWER RES INST OF GUANGDONG POWER GRID
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  • Application Information

AI Technical Summary

Problems solved by technology

At present, the sludge in the sewage treatment plant is mechanically dehydrated, and the moisture content is generally about 70%, which is far from meeting the moisture content requirements of sludge incineration.
If the traditional sludge drying and granulation system is used, although the moisture content can reach below 20%, the cost is often high

Method used

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  • A sludge drying and incineration system relying on thermal power plants
  • A sludge drying and incineration system relying on thermal power plants

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Embodiment Construction

[0036] Below in conjunction with accompanying drawing and specific embodiment the present invention is described in further detail:

[0037] see figure 1 , is an embodiment of the sludge drying and incineration system relying on a thermal power plant of the present invention. The thermal power plant includes a start-up boiler and a power plant boiler 1. The superheated steam generated by the power plant boiler 1 is connected to the steam turbine 2, the auxiliary steam pipeline of the start-up boiler and a steam connection in sequence through pipelines. Box 3, (starting boiler auxiliary steam pipeline is not drawn).

[0038] The system includes a paddle-type sludge dryer 4, an auger-type feeder for feeding it, and a finished sludge collection device 6 for collecting its finished sludge.

[0039]Paddle type sludge dryer 4 is a model with no direct contact between steam and sludge, and the moisture content of dried sludge after drying is about 50%. There are steam inlet, exhaust...

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Abstract

The invention discloses a sludge drying incineration system based on a thermal power plant. The system comprises a sludge drying system and a sludge mixing incineration system, wherein the sludge drying system comprises a heat supply system, a feeding system, a paddle type sludge dryer, a dead steam treating system, a dead steam recycling system and a dried sludge collecting and handling system; and the sludge mixing incineration system comprises a dried sludge mixing system and a dried sludge incineration system. According to the sludge drying incineration system based on the thermal power plant, sludge is dried through high-temperature steam produced by a boiler of the thermal power plant; the dried sludge is incinerated and the resulting heat is used for producing steam; the whole process is free of pollutant; therefore, an effective way is actually developed for recycling the wastes and treating wastes with the wastes, the social and environmental benefits are obvious, and a feasible way is provided for harmless handling, reducing handling and recycling of sludge.

Description

technical field [0001] The invention relates to a sludge treatment system in the field of environmental protection, in particular to a sludge drying and incineration system utilizing steam from a thermal power plant and a boiler of the power plant. Background technique [0002] In recent years, with the development of my country's social economy and urbanization, urban sewage has been increasing, and how to deal with sludge as a by-product of sewage treatment has become a major problem facing society today. According to statistics, by 2010, there were 2,840 urban sewage treatment plants across the country, and the statistics in 2013 show that there are currently 3,600. The annual sewage treatment capacity of these sewage treatment plants can reach 34.4 billion cubic meters. And every 10,000 tons of sewage will produce 5 tons of sludge, that is, 34.4 billion cubic meters of sewage can produce about 20 million tons of sludge, but as of 2010, the harmless treatment rate of slu...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C02F11/12F23G7/00B01D50/00F23G7/06
CPCY02E20/12
Inventor 殷立宝曹通徐齐胜方立军刘洪锟张晗
Owner ELECTRIC POWER RES INST OF GUANGDONG POWER GRID
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