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Method and system for producing clean coal by coupling power generation in a power plant

A power plant, clean technology, used in steam generation, steam generation devices, lighting and heating equipment, etc., to simplify the production process, reduce investment, and stabilize the furnace temperature.

Active Publication Date: 2021-04-30
CHNA ENERGY INVESTMENT CORP LTD +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0009] The purpose of the present invention is to solve the problem of how to realize the combination of power plant power generation and clean coal production, and how to balance the stable production of the two. It provides a method and system for power plant power generation coupled production of clean coal, which can realize the use of hot flue gas from the power plant. Production of clean coal without compromising power plant production

Method used

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  • Method and system for producing clean coal by coupling power generation in a power plant
  • Method and system for producing clean coal by coupling power generation in a power plant
  • Method and system for producing clean coal by coupling power generation in a power plant

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0067] (1) put 5000Nm 3 / h of the first flue gas (900°C) and 4500kg of raw coal (lignite, particle size 20mm) are directly contacted in a countercurrent manner in the rotary kiln, and the coal conversion is carried out for 45min, and the final conversion temperature is 600°C, and the first raw coal is obtained. gas and converted coal;

[0068] (2) put 5000Nm 3 The second flue gas (900°C) per hour is in direct contact with the converted coal in a countercurrent manner in the rotary kiln, and the coal is decontaminated for 35 minutes. The final decontamination temperature is 650°C to obtain the second raw coal gas and decontaminated coal;

[0069] (3) dry-cooling the de-miscellaneous coal to obtain clean coal;

[0070] (4) Merge the first and second raw gas into return air (12000Nm 3 / h, temperature 450°C), and return to the burner of the power plant boiler through the induced draft device for power generation.

[0071] The total flow of the first flue gas and the second flu...

Embodiment 2

[0074] (1) Will 6500Nm 3 / h of the first flue gas (1000°C) and 4000kg of raw coal (non-caking coal, particle size of 1mm) are directly contacted in a fluidized bed in a countercurrent manner, and the coal conversion is carried out for 30 minutes, and the final conversion temperature is 500°C. The first raw gas and converted coal;

[0075] (2) 3500Nm 3 The second flue gas (1000°C) per hour is in direct contact with the converted coal in a countercurrent manner in the rotary kiln, and the coal is decontaminated for 30 minutes, and the final decontamination temperature is 700°C to obtain the second raw gas and decontaminated coal;

[0076] (3) dry-cooling the de-miscellaneous coal to obtain clean coal;

[0077] (4) Merge the first and second raw gas into return air (11000Nm 3 / h, temperature 350°C), and return to the burner of the power plant boiler through the induced draft device for power generation.

[0078] The total flow of the first flue gas and the second flue gas is ...

Embodiment 3

[0081] (1) Will 6000Nm 3 / h of the first flue gas (950°C) and 5000kg of raw coal (long-flame coal, particle size 3mm) are directly contacted in a countercurrent manner in the moving bed, and the coal conversion is carried out for 40 minutes, and the final conversion temperature is 550°C, and the first - raw gas and converted coal;

[0082] (2) 4000Nm 3The second flue gas (950°C) per hour is in direct contact with the converted coal in a countercurrent manner in the rotary kiln, and the coal is decontaminated for 30 minutes, and the final decontamination temperature is 650°C to obtain the second raw coal gas and decontaminated coal;

[0083] (3) dry-cooling the de-miscellaneous coal to obtain clean coal;

[0084] (4) Put the first and second raw gas as figure 2 As shown, each returns to the boiler and burner of the power plant through the induced air device for power generation, and the total return air flow is 10500Nm 3 / h, temperature 400°C.

[0085] The total flow rate...

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Abstract

The invention relates to the field of coupling power generation of power plants and clean coal-fired production, and discloses a method and a system for producing clean coal through power generation coupling of power plants. The method comprises: (1) directly heating the raw coal with the first flue gas from the power plant boiler at 800-1200°C to carry out coal conversion, the final conversion temperature of the coal conversion is 500-640°C, and the conversion time is 10-60 minutes, Obtain the first raw coal gas and converted coal; (2) directly heat the converted coal with the second flue gas of 800-1200° C. from the power plant boiler to remove impurities from the coal, and the final removal temperature of the coal to remove impurities is 650~750℃, the time for removing impurities is 10~60min, to obtain the second raw coal gas and the removed impurities; (3) return the first raw coal gas and the second raw coal gas to the power plant in the form of return air for power generation; (4) Clean coal is obtained by dry cooling the de-miscellaneous coal. While ensuring the normal power generation and production of the power plant, it can also produce low-rank raw coal into clean coal, reducing pollutant emissions in the process of clean coal production and subsequent utilization.

Description

technical field [0001] The invention relates to the field of coupling power generation of power plants and clean coal-fired production, in particular to a method and system for coupling power generation of power plants to produce clean coal. Background technique [0002] In China's energy consumption structure, coal consumption plays a major role. The power generation production of coal-fired thermal power plants has experienced operating losses in recent years, and the overall load rate of coal-fired power plants is low, which restricts the sustainable development of the power generation industry. [0003] In addition, the flue gas emission produced by the civil scattered coal combustion process is an important cause of smog. In order to deal with the increasingly severe air pollution problem, the state has successively issued policy documents and carried out actions to control the atmospheric environment. Compared with coal-fired power plants, about 300 million tons of c...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C10B53/00C10B49/04C10B57/00C10L5/00F22B33/18
Inventor 杜万斗高浩华次东辉麻林苌亮李君张峰陈薇
Owner CHNA ENERGY INVESTMENT CORP LTD
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