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Sludge grading drying gasification coupled coal-fired power generation system and process method thereof

A sludge gasification and power generation system technology, applied in gasification process, pyrolysis sludge, granular/powdered fuel gasification, etc., can solve feeding equipment failure, reduce boiler efficiency, and reduce coal burnout performance and other issues, to achieve the effect of reasonable structure, convenient use and energy saving

Pending Publication Date: 2019-11-12
ZHEJIANG UNIVERSITY OF SCIENCE AND TECHNOLOGY +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The present invention mainly solves the problems in the prior art that the water content of the sludge raw material is too high, which leads to failure of the feeding equipment when mixing the sludge with coal powder, which affects the normal operation of the system, and the water content of the feed is too high to reduce the To solve the technical problems of coal burnout performance and boiler efficiency reduction, a sludge staged drying gasification coupled coal-fired power generation system and its process method are provided to reduce the water content of sludge through cycle staged drying

Method used

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  • Sludge grading drying gasification coupled coal-fired power generation system and process method thereof
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  • Sludge grading drying gasification coupled coal-fired power generation system and process method thereof

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Embodiment 1

[0032] according to figure 1 , image 3 , Figure 4 The shown sludge classification drying gasification coupled coal-fired power generation system includes a sludge drying unit that uses steam to dry the sludge raw material stored in the sludge storage bin 2, and is used to dry and dehydrate the sludge The sludge gasification and combustion unit is used to transport and gasify the sludge to produce combustible gas, which is used to send the combustible gas and exhaust gas produced by the sludge gasification and combustion unit to the gas incineration unit for combustion in the coal-fired boiler 29. The sludge drying unit, the sludge gasification combustion unit and the gas incineration unit are connected in sequence, the sludge drying unit includes a drum type sludge drying box 1, and the sludge storage bin 2 It is connected to the sludge inlet of the drum type sludge drying box 1 via a sludge conveyor 3, and the sludge gasification combustion unit includes a dry sludge conv...

Embodiment 2

[0036] according to figure 1 , image 3 The difference between the present embodiment shown and Embodiment 1 is that: the gas separation outlet 13 of the cyclone separator 6 is connected to the two heat exchangers, and the two heat exchangers are respectively the first dry The drying heat exchanger 21 and the circulating drying heat exchanger 22, the steam temperature limit value of the fluid outlet 23 of the first drying heat exchanger 21 in the control unit 9 is 180°C-220°C , the steam pressure limit value is 1.5MPa-2MPa; the steam temperature limit value of the fluid outlet 23 of the circulating drying heat exchanger 22 in the control unit 9 is 120°C-160°C, and the steam pressure limit The value is 1.2MPa-1.7MPa.

[0037] Compared with Embodiment 1, this embodiment further restricts the heat exchanger, and measures the temperature of the fluid outlet through the temperature detection device 18 provided for the fluid outlet 23 of the first drying heat exchanger 21 and the ...

Embodiment 3

[0039] according to figure 1 , figure 2 The difference between the present embodiment shown and Embodiment 1 is that: the left and right branches of the discharge port are divided into the gasification discharge port 11 and the sludge circulation discharge port 12, and the gasification The discharge port 11 and the sludge circulation discharge port 12 are connected to form a herringbone structure, and the gasification discharge port 11 and the sludge circulation discharge port 12 are connected by a flap 25, The turning plate 25 is connected to the discharge box provided with the gasification discharge port 11 and the sludge circulation discharge port 12 through the rotating shaft 26, and the turning plate 25 is connected to the The gasification discharge port 11 and the sludge circulation discharge port 12 are adapted to rotate left and right, the rotating shaft 26 is connected to the rotating motor 27, and the rotating motor 27 is connected to the control unit 9, the gasif...

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Abstract

The invention relates to a sludge grading drying gasification coupled coal-fired power generation system, which is characterized in that a sludge weighing device is arranged in a drum type sludge drying box, and is connected to a control unit set with a sludge water content threshold, a dry sludge conveying device comprises a gasification conveying branch line connected to a circulation fluidizedbed sludge gasification furnace and a sludge circulation drying branch line connected to a sludge conveyor, the material outlet of the drum type sludge drying box comprises a gasification material outlet and a circulation sludge outlet closed or opened by the control unit, the gasification material outlet is connected to the gasification conveying branch line, and the circulation sludge outlet isconnected to the sludge circulation drying branch line. According to the present invention, the sludge grading drying gasification coupled coal-fired power generation system for reducing the sludge water content through circulation grading drying, and the process method thereof are provided.

Description

technical field [0001] The invention relates to a sludge classification drying gasification coupled coal-fired power generation system and a process method thereof, belonging to the technical field of solid waste treatment. Background technique [0002] According to the statistical data of the "China Sludge Treatment and Disposal In-depth Research and Investment Strategic Planning Analysis Report" released by the Qianzhan Industry Research Institute, it is estimated that my country's sludge production will reach 63.25 million tons in 2019, and my country's sludge production will exceed 7,000 tons in 2020. tons. In 2021, my country's sludge production will exceed 80 million tons. In the next five years (2019-2023), the average annual compound growth rate will be about 11.49%, and it is predicted that my country's sludge production will reach 97.72 million tons in 2023. [0003] For a long time in the past, most sewage treatment plants in my country paid more attention to sew...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C02F11/13C02F11/10C10J3/56C10J3/72C10J3/84
CPCC02F11/13C02F11/10C10J3/56C10J3/72C10J3/84C10J2300/0923C10J2300/0909C10J2300/1671C10J2300/1807
Inventor 叶超郑友取许友生李国能董聪
Owner ZHEJIANG UNIVERSITY OF SCIENCE AND TECHNOLOGY
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