Steam-exhaust coagulation heat recovery system of coal-fired power plant

Abstract

The invention discloses a waste steam and condensation heat recovery system of a coal-fired power plant. The recovery system comprises a high-temperature heat pump device for absorbing heat from waste steam of the coal-fired power plant, and the temperature of a working medium of the high-temperature heat pump is improved by the circulation of the heat pump; a carbon dioxide capture device for utilizing the working medium of the high-temperature heat pump for heating an MEA absorbing agent which is used for capturing carbon dioxide in flue gas to complete the desorption process; a trans-critical carbon dioxide heat pump device for absorbing the heat from the waste steam of the coal-fired power plate, and the temperature of the working medium of the carbon dioxide heat pump is improved by the circulation of the heat pump; and a regional heating and heat using device for utilizing the working medium of the carbon dioxide heat pump for heating regional domestic water and regional heating hot water. The use of the system can improve the economics of the MEA method for capturing the carbon dioxide for the coal-fired power plate, reduce the energy consumption for regional heating and greatly reduce the water consumption of the coal-fired power plant and the thermal pollution caused by the waste steam and the condensation waste heat of the power plant.

Description

technical field [0001] The invention relates to the technical field of energy saving, in particular to a waste steam condensation heat recovery system of a coal-fired power plant. Background technique [0002] my country accounts for 72% of primary energy coal, 60% is used for power generation, and coal power accounts for 78%. In 2007, the installed capacity of electric power exceeded 700 million kW. According to 1kW per capita when reaching "well-off society", the installed capacity will reach 1.5 billion kW in 2020; double that. At that time, even if ultra-supercritical technology is adopted, the CO 2 The emissions will also be intolerable to the "Bali Island Roadmap" for the reduction of the world's greenhouse gas emissions. So CO 2 Advanced capture and deposition technologies are urgently needed. In recent years, CO 2 Capture and storage technology (CCS for short) is considered to reduce CO 2 It is a technology with great potential for emissions, and has received ...

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Problems solved by technology

[0010] The problem to be solved by the present invention is to provide a waste steam condensation heat recovery system of a coal-fired power plant to overcome the defect of waste of resources in the prior art due to extraction of steam to heat the absorbent

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