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Generating set for large-proportion blending combustion of dried sludge

A technology for generating sets and drying sludge, which is applied in the combustion method, control combustion, combustion equipment and other directions, can solve the problem of not being able to mix and dry sludge in a large proportion, and achieve the effect of multi-sludge harmless treatment

Inactive Publication Date: 2021-01-05
烟台清泉实业有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] The purpose of the present invention is to overcome the technical problem of not being able to burn dry sludge in a large proportion in the prior art by technically transforming the peripheral equipment without changing the original scale of the active generator set, and to provide a large-scale blending The generator set that burns dry sludge can realize more harmless treatment of sludge

Method used

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  • Generating set for large-proportion blending combustion of dried sludge
  • Generating set for large-proportion blending combustion of dried sludge

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0021] Example 1, such as figure 1 The shown large-scale power generation unit mixed with dried sludge includes a boiler 100, a conveying device for transporting mixed dried sludge and coal to the boiler 100, and a dust removal device for removing dust from the flue gas generated by the boiler , the dust removal device includes three dust collectors 201, and the first fly ash outlet 203 of each dust collector 201 communicates with the fly ash discharge pipeline 202; between the boiler 100 and the dust removal device 200, a fly Ash recycling device 300, the fly ash recycling device 300 includes a Roots blower 301, the air outlet of the Roots blower 301 is connected to a fly ash return pipe 302, and the fly ash return pipe 302 is divided into two branches and passed through The furnace walls on both sides of the boiler 100 are opened in the furnace; second fly ash outlets 305 are opened in bypasses of the ash bins of the two dust collectors 201, and each of the second fly ash ou...

Embodiment 2

[0024] Embodiment 2, the others are the same as Embodiment 1, the difference is that the dust collector 201 is a pulse-jet cloth bag dust collector, the total number of cloth bags is more than 1056, and the cloth bags adopt PPS surface layer and 30 layers of superfine fiber / PTFE base Cloth, PTFE coating on the surface, silicone coating on the needle holes, the compressed air pipelines of the steam drums are connected in parallel, and a stop valve is installed on each steam drum inlet pipeline to facilitate single-group isolation maintenance.

[0025] The dust collectors of #1~#4 furnaces of the applicant’s power plant were originally designed as a combination of electrostatic precipitator + 2 bag dust collectors. After passing through the precipitator, the flue gas enters the desulfurization system and the wet electrostatic precipitator system, and then is discharged through the chimney to meet the standard. A large proportion of mixed firing and drying After the sludge, becaus...

Embodiment 3

[0028] Embodiment 3, other is identical with embodiment 1 or 2, and difference is:

[0029] see figure 2, the conveying device includes a dried sludge conveying belt 403 arranged between the sludge dehydration workshop 401 and the dried sludge storage room 402, the dried sludge storage room is fully sealed except for the entrance and exit of the conveyor belt, and the inside is in In the state of slight negative pressure, the exhaust gas is pumped to the exhaust gas treatment device for treatment; the dried sludge conveying belt 403 is equipped with a coal plow at one end of the dried sludge storage room, and the dried sludge drop point is located above the storage hopper 404 Center, the discharge port 408 of the storage hopper 404 is facing the center of the coal conveying belt 405, the upper end of the discharge port 408 is provided with multiple conjoined screw feeders 407, the lower end is provided with a measuring belt scale 406, and the dry The sludge is mixed into the...

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Abstract

The invention relates to a generating set for large-proportion blending combustion of dried sludge. Compared with the prior art, the generating set is characterized in that a fly ash recirculation device is additionally arranged between a boiler and a dust removal device, the fly ash recirculation device comprises a Roots blower, an air outlet of the Roots blower is connected with a fly ash returnpipe, and the fly ash return pipe is divided into two branches which respectively penetrate through furnace walls on both sides of the boiler to be opened in a hearth; and second fly ash outlets areformed in ash bin bypasses of two or all dust removers, each second fly ash outlet is connected with a thin manual overhaul gate valve, a pneumatic feed valve, a flexible pipe connector and a powder inlet of a three-way jet feeder through pipelines in sequence, and an air inlet and an air outlet of each three-way jet feeder are connected to the fly ash return pipe. According to the generating set,the doping proportion can reach up to 8% to 15%, and more sludge innocent treatment is realized.

Description

technical field [0001] The invention relates to the technical field of power generation, in particular to a power generation unit for burning dry sludge mixed with a large proportion. Background technique [0002] Municipal domestic sludge is a sedimentary substance produced during the sewage treatment and purification process of urban sewage treatment plants. It is an extremely complex heterogeneous body composed of organic debris, bacterial cells, inorganic particles, and colloids. Sludge contains a large number of pathogenic bacteria, parasites, pathogenic microorganisms, heavy metals such as arsenic, copper, chromium, mercury, toxic and harmful substances, and a large amount of water. Sludge also contains a large amount of N, P, K, Ca and organic matter, and N and P are mainly in organic state and have long-term effect. Therefore, municipal sludge is a kind of solid waste containing harmful substances. [0003] At present, the sludge treatment methods in my country mai...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): F23B70/00F23K3/00F23N1/00B01D46/02
CPCF23B70/00F23K3/00F23N1/005B01D46/023
Inventor 张源斌邹强姜海明陈兆旭盛书强
Owner 烟台清泉实业有限公司