Method and system for coupling power plant power generation and clean coal production

A power plant, clean technology, applied in steam generation method using heat carrier, lighting and heating equipment, fuel, etc., to achieve the effect of reducing pollutant emission, simplifying production process and stabilizing furnace temperature

Active Publication Date: 2019-06-25
CHNA ENERGY INVESTMENT CORP LTD +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0010] The purpose of the present invention is to solve the problem of how to achieve the combination of power plant power generation and clean coal production, and to balance the stable production of the two, and to provide a system and method for power plant coupled production of clean coal

Method used

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  • Method and system for coupling power plant power generation and clean coal production
  • Method and system for coupling power plant power generation and clean coal production
  • Method and system for coupling power plant power generation and clean coal production

Examples

Experimental program
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Effect test

Embodiment 1

[0063] (1) put 5000Nm 3 / h of the first flue gas (900°C) indirectly heats 4,500kg of raw coal (lignite, with a particle size of 20mm) in the rotary kiln for 45 minutes of coal conversion, and the final conversion temperature is 600°C to obtain the first flue gas, the first pyrolysis gas and converted coal;

[0064] (2) put 5000Nm 3 / h of the second flue gas (900°C) indirectly heats the converted coal in the rotary kiln to remove impurities for 35 minutes. ;

[0065] (3) dry-cooling the de-miscellaneous coal to obtain clean coal;

[0066] (4) The first and second pyrolysis gases are merged into return air (temperature 450°C), and returned to the burner of the power plant boiler through the induced draft device for power generation; the first and second flue gas are merged into return flue gas ( 800℃) into the power plant boiler for power generation; the total flow of return air and return flue gas is 12000Nm 3 / h;

[0067] The total flow rate of the first flue gas and the...

Embodiment 2

[0070] (1) Use 6500Nm 3 / h of the first flue gas (1000°C) indirectly heats 4000kg of raw coal (non-caking coal, particle size: 30mm) in the tower moving bed to carry out coal conversion for 30min, and the final conversion temperature is 500°C to obtain the first flue gas, first pyrolysis gas and converted coal;

[0071] (2) Use 3500Nm 3 / h of the second flue gas (1000°C) indirectly heats the converted coal in the rotary kiln to remove impurities for 30 minutes, and the final removal temperature is 700°C to obtain the second flue gas, the second pyrolysis gas and the coal;

[0072] (3) dry-cooling the de-miscellaneous coal to obtain clean coal;

[0073] (4) The first and second pyrolysis gases are merged into return air (temperature 350°C), and returned to the burner of the power plant boiler through the induced draft device for power generation; the first and second flue gas are merged into return flue gas ( 900℃) into the power plant boiler for power generation; the total...

Embodiment 3

[0077] (1) Use 6000Nm 3 / h of the first flue gas (950°C) indirectly heats 5000kg of raw coal (long-flame coal, particle size: 3mm) in the tower-type moving bed, and carries out coal conversion for 40min, and the final conversion temperature is 550°C, and the first flue gas, first pyrolysis gas and converted coal;

[0078] (2) with 4000Nm 3 The first flue gas (950°C) in the rotary kiln indirectly heats the converted coal in the rotary kiln for 30 minutes of coal removal, and the final removal temperature is 650°C to obtain the second flue gas, the second pyrolysis gas and the removal of impurities coal;

[0079] (3) dry-cooling the de-miscellaneous coal to obtain clean coal;

[0080] (4) The first and second pyrolysis gases are merged into return air (temperature 400°C), and returned to the burner of the power plant boiler through the induced draft device for power generation; the first and second flue gas are merged into return flue gas ( 750℃) into the power plant boiler fo...

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Abstract

The invention relates to the field of coupling of power plant power generation and clean production of fired coal, and discloses a method and a system for coupling power plant power generation and clean coal production. The method comprises: (1) indirectly heating raw coal by using first flue channel gas with a temperature of 800-1200 DEG C from a power plant boiler, and carrying out coal conversion to obtain first flue gas, first pyrolysis gas and converted coal, wherein the final conversion temperature of the coal conversion is 500-640 DEG C, and the conversion time is 10-60 min; (2) indirectly heating the converted coal by using second flue channel gas with a temperature of 800-1200 DEG C from the power plant boiler, and carrying out coal impurity removing to obtain second flue gas, second pyrolysis gas and impurity removed coal, wherein the final impurity removing temperature of the coal impurity removing is 650-750 DEG C, and the impurity removing time is 10-60 min; (3) merging the first pyrolysis gas and the second pyrolysis gas into return air, and returning to the power plant boiler; and (4) carrying out dry cooling on the impurity removed coal to obtain clean coal. With the method and the system of the present invention, the normal power generation of the power plant is achieved while the low-grade raw coal is produced into the clean coal.

Description

technical field [0001] The invention relates to the field of coupling power generation and coal-fired clean production in power plants, in particular to a system and method for coupling 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 of the top 10 m...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C10B53/00C10B47/00C10B57/00C10L5/00F22B1/18F23J15/06
Inventor 杜万斗高浩华次东辉苌亮麻林李君张峰孙任晖陈薇
Owner CHNA ENERGY INVESTMENT CORP LTD
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