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

A power plant, clean technology, applied in steam generation method using heat carrier, lighting and heating equipment, reduction of greenhouse gases, etc., to achieve the effect of reducing pollutant emissions, reducing coal consumption, and reducing investment

Active Publication Date: 2021-02-23
CHNA ENERGY INVESTMENT CORP LTD +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0010] 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

[0071] (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;

[0072] (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;

[0073] (3) dry-cooling the de-miscellaneous coal to obtain clean coal;

[0074] (4) After the first and second raw coal gas are combined, they are fed into the co-firing furnace for combustion, and the hot air obtained is fed into the waste heat boiler to generate steam and tail gas. Steam (temperature 800°C) and tail gas (12000Nm 3 / h, te...

Embodiment 2

[0078] (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;

[0079] (2) 3500Nm 3The 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;

[0080] (3) dry-cooling the de-miscellaneous coal to obtain clean coal;

[0081] (4) After the first and second raw coal gas are combined, they are fed into the co-firing furnace for combustion, and the hot air obtained is fed into the waste heat boiler to generate steam and tail gas. Steam (temperature 900°C) and tail gas (11000Nm 3 / h, temperature ...

Embodiment 3

[0085] (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;

[0086] (2) 4000Nm 3 The 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;

[0087] (3) dry-cooling the de-miscellaneous coal to obtain clean coal;

[0088] (4) After the first and second raw coal gas are combined, they are fed into the co-firing furnace for combustion, and the hot air obtained is fed into the waste heat boiler to generate steam and tail gas. Steam (temperature 750°C) and tail gas (10500Nm 3 / h, temper...

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Abstract

The invention relates to the field of power generation coupling of power plants and clean coal production, and discloses a method and system for power generation coupling production of clean coal in 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 gas and converted coal; (2) directly heat the converted coal with the second flue gas from the power plant boiler at 800-1200°C for coal removal, and the final removal temperature of coal removal is 650-750°C , the impurity removal time is 10-60 minutes, and the second raw gas and the second raw coal are obtained; (3) the first raw gas and the second raw gas are burned, and the hot air obtained is passed into the waste heat boiler to generate steam and tail gas, and returns to the power plant The boiler is used for power generation; (4) dry-cooling the de-miscellaneous coal to obtain clean coal. It realizes the normal power generation production of the power plant and at the same time produces low-rank raw coal into clean coal.

Description

technical field [0001] The invention relates to the coupling field of power generation and clean coal production in power plants, in particular to a method and system for coupling power generation in power plants to produce clean coal. Background technique [0002] In China's energy consumption structure, coal consumption plays a major role. Among them, coal-fired power generation is the main form of coal consumption. However, due to coal-fired pollutant emissions and the impact of coal prices, coal-fired thermal power plants have experienced operating losses in power generation production 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 coal burning process is an important cause of smog. In recent years, the Beijing-Tianjin-Hebei region is the region with the most serious air pollution in my country, and 8 o...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): F22B1/18C10B53/00C10B49/02C10B57/00C10L5/00F23J15/06
CPCY02E20/30Y02P20/129
Inventor 杜万斗次东辉高浩华麻林李君张峰苌亮孙任晖陈薇
Owner CHNA ENERGY INVESTMENT CORP LTD
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