Research On Operation Economy Of Carbon Capture System For Coal-fired Power Plant

It is a promising technology to deal with climate change and reducing greenhouse gases emissions that casue of global warming called carbon dioxide capture and sequestration in coal-fired power plant and this system based on amido absorption which is almost fit to all of the coal-fired plant has potential to reduce discharge of the carbon dioxide. However, there ate many difficulties during popularizing such as high woking costs and investment costs. So the really maters for this technology are energy consumption and costs of carbon capture system.On the basis of the principle of equivalent enthalpy drop, the coal-fired power plant which has carbon capture system is chosen as research object and Aspen is used. In the first place, the procedure of absorption and regeneracy in carbon capture system is simulated to find the factors which influence the power consumption. Then, analyse and computing models of heat economy and operational costs are created by the principle of equivalent enthalpy drop which are applied in300MW and600MW plants, and the change of different carbon caprue rate and operating mode is come to. The result shows that deduce degree of units cycle thermal efficiency increases with the carbon caprue rate, and9percentage points down when the carbon rate tops90percent. The thermo cost is the highest rates in operation cost which increases with capture rate, and chemistry costs, power consumption, worker wages, maintenance and management costs are next. It will point out the direction of energy conservation and cost reduction in carbon capture system to make a reference for reducing discharge of the carbon dioxide.