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

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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Problems solved by technology

[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 generated by methane combustion is the auxiliary heat source of the coal-fired power generation system. Through the energy cascade utilization, the efficient conversion of coal to electricity is promoted, and the comprehensive realization of efficient coal-fired power generation and the realization of sulfur oxides , nitrogen oxides, dust and other pollutants and zero emissions of carbon dioxide greenhouse gases

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