Solar energy and geothermal energy assisted CO2 Rankine cycle assisted decarbonization and denitrification system for coal-fired unit

Abstract

The invention provides a solar energy and geothermal energy assisted CO2 Rankine cycle assisted decarbonization and denitrification system for a coal-fired unit. The decarbonization and denitrification system comprises a coal-fired power generation system, a denitrification and desulfurization system, a monoethanolamine CO2-absorption system and a solar energy and geothermal energy assisted supercritical CO2 Rankine cycle system, wherein the coal-fired power generation system comprises an economizer, a boiler, a steam turbine, a condenser and a condensate pump which are connected sequentially, and the condensate pump is connected with the economizer; the denitrification and desulfurization system comprises a liquid ammonia evaporator, an ammonia and air mixer, ammonia spray grid equipment, a denitrification reactor, an air preheater, an electric precipitator and a desulfurization system which are connected sequentially, and the ammonia spray grid equipment is connected with the economizer. According to the solar energy and geothermal energy assisted CO2 Rankine cycle assisted decarbonization and denitrification system for the coal-fired unit, the liquid ammonia denitrification system, the desulfurization system and a monoethanolamine decarbonization system can remove NOx, SO2 and CO2 in flue gas of the coal-fired unit, and emission reduction of the flue gas of the coal-fired unit is realized.

Description

technical field [0001] The invention relates to a coal-fired unit equipment, especially a solar geothermal energy CO 2 Rankine cycle auxiliary coal-fired unit decarbonization and denitrification system. Background technique [0002] Economic development is regarded as the driving force of environmental change. With the development of the global economy, energy consumption is increasing year by year. Excessive energy consumption has further increased the pressure on energy supply, environmental pollution, and climate deterioration. The "UNEP Emissions Gap Report" issued by the United Nations Environment Program (UNEP) in late 2013 pointed out that the world is not doing well in its efforts to reduce greenhouse gas emissions. That could equate to 8 to 12 gigatonnes of carbon dioxide equivalent, which is more than the recommended level for keeping the world temperature rise below 2°C. In the face of growing environmental crises and changing climate patterns, there have been m...

AI Technical Summary

Problems solved by technology

The absorbent and reducing agent in the post-combustion decarbonization and denitrification system need to consume a lot of heat energy. The traditional method is to use the steam extraction of the unit as the heat source of the decarbonization and denitrification system, which is quite unfavorable to the economical and safe operation of the unit.

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