Power generation system with supercritical water thermal combustion of coal and supercritical carbon dioxide cycle coupled

A supercritical water and carbon dioxide technology, which is applied to machines/engines, steam engines, mechanical equipment, etc., can solve the problems of large pollutant emissions, high energy consumption, high removal costs, and reduce heat loss and capture costs. Low, the effect of improving the overall efficiency

Inactive Publication Date: 2018-12-07
SOUTHEAST UNIV
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[0006] Purpose of the invention: In view of the problems that the current coal-fired thermal power units have high energy consumption, large pollutant discharge, high removal cost, and are one of the main emission sources of greenhouse gases such as carbon dioxide, to provide a recycling process using supercritical carbon dioxide Supercritical hydrothermal combustion of coal is the main heat source, and the heat

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  • Power generation system with supercritical water thermal combustion of coal and supercritical carbon dioxide cycle coupled

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[0026] The present invention will be described in further detail below in conjunction with the accompanying drawings.

[0027] Such as figure 1 As shown, the power generation system of coal supercritical hydrothermal combustion and supercritical carbon dioxide cycle coupling includes a coal supercritical hydrothermal combustion reaction system, a supercritical carbon dioxide cycle power generation system and an auxiliary heating system.

[0028] The coal supercritical hydrothermal combustion system includes a coal water slurry storage tank 1, a high pressure coal water slurry pump 2, a first heat exchanger 3, a second heat exchanger 5, a supercritical hydrothermal combustion reactor 6, and a circulating water pump 7. The third heat exchanger 8, the fourth heat exchanger 9, the carbon dioxide separator 10, the particulate separator 11, the particulate collector 12, the gas turbine 13, the hydraulic turbine 14, the waste liquid treatment device 15, the carbon dioxide capture device 1...

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Abstract

The invention discloses a power generation system with supercritical water thermal combustion of coal and supercritical carbon dioxide cycle coupled. The power generation system comprises a supercritical water thermal combustion reaction device of coal, a supercritical carbon dioxide cycle power generation device and an auxiliary heating device. In the power generation system, heat sources are provided by the supercritical water thermal combustion reaction device of the coal and the auxiliary heating device. Supercritical carbon dioxide in the supercritical carbon dioxide cycle power generation device is adopted as a cycle working medium. According to the power generation system with supercritical water thermal combustion of coal and supercritical carbon dioxide cycle coupled, the supercritical carbon dioxide is adopted as the working medium; supercritical water thermal combustion of the coal serves as the main heat source; heat produced by methane combustion serves as an auxiliary heat source; by means of gradient utilization of energy, efficient transformation of coal power is promoted; and efficient power generation of fire coal is comprehensively achieved, and meanwhile, zero release of pollutants such as sulfur oxides, nitrogen oxides, dusts and the like and greenhouse gases such as carbon dioxide is achieved.

Description

technical field [0001] The invention belongs to the field of coal clean combustion power generation, in particular to a power generation system coupled with coal supercritical hydrothermal combustion and supercritical carbon dioxide circulation. Background technique [0002] Coal is one of the most important fossil fuels in my country and even in the world. Its clean and efficient utilization is the key to realizing the sustainable development strategy of my country's economy and environment, and the clean and efficient power generation of coal is the top priority. In view of the current situation that coal-fired thermal power units have high energy consumption, large pollutant emissions, high removal costs, and are one of the main sources of greenhouse gas emissions such as carbon dioxide, actively explore and develop efficient, clean and low-carbon coal-fired power generation technologies very necessary. [0003] The supercritical hydrothermal combustion of coal is a new ...

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Application Information

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IPC IPC(8): F01K25/10F01K23/06F01K21/04F01K21/00F01K27/00F01K13/00F01D15/10
CPCF01D15/10F01K13/00F01K21/00F01K21/04F01K23/06F01K25/103F01K27/00
Inventor 李照志钟文琪刘雪娇邵应娟
Owner SOUTHEAST UNIV
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