| Global warming has become the most massive environmental problem of the21st century which human beings are facing with. CO2is the main greenhouse gas resulting in greenhouse effect. It is imperative to reduce emissions of CO2. Coal-fired power plant is the main emission source in our country. Reducing CO2emission of power plant is the key to slow down greenhouse effect. Decarburization of power plant has many ways, in which decarburization after burning is the most effective and potential way. Using CaO as adsorbent has a bright future because of its wide distribution, low price and large adsorption capacity.This paper utilized Aspen plus software to model boiler and turbine of600MW power plant, and proved the accuracy of the model in different conditions. It is the basis of the heat integration research in the following chapters. Established the CaO-based decarburization model and CO2compression model and analyzed energy consumption characteristics of CaO-based decarburization and its influence on plant performance.. The high-grade heat distributions which generated in the process of decarbonization were revealed. Heat sources with the high level mainly include carbonization heating, clean flue gas flow and rich CO2flue gas flow. Using these heat sources to replace boiler load, the research results showed that the efficiency was reduced to35.2%. And if using these heat sources for establishing the new HRSG and steam turbine system, the net system efficiency will be35.27%. Integrated two new technologies which are CaO-based decarburization and SOFC system. The SOFC system was modeled and verified. After integrating the waste heat sources from the CaO-based decarburization process with SOFC system, the results showed that the efficiency was about42.4%. At the last introduced the experimental platform of CaO-based decarburization..The research results of this paper will provide a useful reference for the CO2removel of CaO-based. |
