An integrated system and method for solar-assisted carbon dioxide capture and heating

Abstract

The invention discloses an auxiliary solar energy carbon-dioxide-capturing and heating integrated system and method thereof. The integrated system is mainly composed of a coal-fired power generation subsystem, a steam extraction pressure reduction temperature reduction circulation subsystem, a carbon dioxide capturing subsystem, a solar energy heat collection subsystem and a heat supplying subsystem. The subsystems are connected with a valve mainly through a heat exchanger and related pipelines to form the integrated system. To meet the heat supply requirements of the coal-fired power generation subsystem, the carbon dioxide capturing subsystem and the heat supplying subsystem at different times in different seasons, the solar energy heat collection quantity is supplied for different subsystems through an output end valve control mode. The system can maintain dual effects of power plant power output and carbon dioxide emission reduction in summer, and the heat supplying area is increased on the basis of achieving carbon dioxide emission reduction of a coal-fired power plant in winter. The integrated system can achieve renewable energy utilization and power plant carbon dioxide capturing at the same time, and large-scale application of the domestic solar energy utilizing and carbon dioxide capturing technology is strongly promoted.

Description

technical field [0001] The invention relates to a method and system for the integration of solar energy-assisted carbon dioxide capture and heat supply, in particular to the integration of a carbon dioxide capture power plant and a solar heat collection and heat supply system. Different operating modes are set for different seasons and at different times to achieve Comprehensive utilization of carbon dioxide capture power plant heat. Background technique [0002] CO 2 considered to be the cause of the greenhouse effect. From the beginning of the industrial revolution in 1850 to the present, atmospheric CO 2 The average concentration rose from 280ppm to 370ppm, and at the same time the global average temperature rose by 0.6 to 1°C. The Intergovernmental Panel on Climate Change (IPCC) predicts that by 2100, atmospheric CO 2 The content will climb to 570ppm, causing the global average temperature to rise by 1.9℃. According to the latest research data from the Global Carbon...

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Problems solved by technology

[0004] For CO with low concentration and large flow in the flue gas of coal-fired power plants 2 , the most promising approach is to use 2 solvents for chemical absorption, among which ethanolamine (MEA) solution has been applied to CO in coal-fired power plants due to its fast absorption rate, high absorption efficiency and mature technology. 2 However, the high energy consumption of the absorption liquid regeneration and high operating costs are the main factors that limit the wide application of the MEA solution absorption method

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