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Present status of industrialization development of wind-power generation in China, its problems and countermeasures
DENG Xiao-lingThe wind-power generation in China has been grown up. Reviewing its industrialization policy and strategy, the authors bring some constructive suggestions and solutions to solve the problems in its development
Review on carbon dioxide capture of coal-fired power plants in China
JING Qiang;YANG Chengyu;SONG Jianke;WU Ruocheng;HU Liming;LU Shijian;HUANG Zhigang;China's share of sustainable energy sources is rising rapidly, but coal-based thermal power generation remains the“ ballast” of the power system and the main source of CO2 emissions. Thermal power generation accounts for 40% of the national total carbon emissions, and is one of the largest sources of carbon emissions. Therefore, CO_2capture technology is crucial to the net-zero emission target of the power industry. In this paper, we discuss the progress of CO2 capture technology in China's coal-fired power plants in the context of realizing the carbon peaking and carbon neutrality goal, and the organic amine chemical absorption method is currently the most mature and feasible CO_2capture technology. Typical organic amine absorbents include monoethanolamine(MEA), diethanolamine(DEA), methyl diethanolamine(MDEA). The development history of various organic amine chemical absorption methods was discussed. The solubility, heat of reaction, and advantages and disadvantages of common organic amines were compared. Typical carbon capture, utilization and storage projects in China are listed. The number of coal-fired power plants applying CCUS is increasing, and the cost of the technology is decreasing, but the scale of the demonstration projects is still relatively small, However, the scale of demonstration projects is still small. In order to realize the change from“ dual control” of energy consumption to“ dual control” of carbon emission, it is necessary to give full play to the role of CCUS and reduce CO2 emission. Although the carbon capture technology is relatively mature, the commercial application still faces great challenges due to the high cost, small scale and lack of policy. The future development can start from cost reduction(strengthening the research and development of capture technology, lowering the regeneration temperature of organic amine solution), expanding the scale of commercial application(good utilisation of CO2 products in the CCUS industry chain), and formulating relevant policies, etc., and formulating to provide technical support for the wide application of CCUS.
Discussion on process of desulfurization waste water's zero-draining disposal
At present,the most widely used desulfurization method in China is limestone-gypsum wet flue gas desulfurization technology.In coal-fired power plants,the biggest difficulty of achieving Zero-draining is how to recycle the desulphurization wastewater and other salt water.A precipitation+depth treatment process for advanced treatment is adopted,the dissolved solids in desulfurization wastewater are removed in the form of solid crystalline salt.Treated wastewater achieve the requirements of Indirect Open Recirculating Cooling Water System in Industrial Circulating Cooling Water Treatment Design Specification and can be used for supplementary water to power plant cooling water.The crystallization salt can be used as industrial salt after drying and packaging.The process can lead to desulfurization waste water Zero-draining.
Research on simultaneous desulfurization and denitrification technology for sintering flue gas in iron and steel industry
SHI Shao-jun,YE Zhao-lianOn the basis of the characteristic of sintering flue gas in iron and steel industry as well as development trend of desulphurization and denitrification,the technology for simultaneous desulphurization and d denitrification of sintering flue gas were presented,named as "double alkali method" liquid state oxidation technology.The feasibility with respect to technical properties and mechanism were demonstrated.
Application and comparison of SCR,SNCR and SNCR/SCR flue gas denitration technology
WANG Jihua;China's economic strength is increasing,power consumption is gradually increasing. And then leads to combustion of coal-fired generating units of nitrogen oxides and other harmful substances will be more and more. The selective catalytic reduction( SCR),selective non catalytic reduction( SNCR),Hybrid SNCR-SCR denitrification principle for coal-fired power plant and its influencing factors and the engineering application have been briefly presented. Detailed comparison process of the three kinds of denitration technology.
Analysis of research status of supercritical carbon dioxide cycle power generation technology at home and abroad
LI Shuguo;AN Weizheng;LI Pengcheng;CHEN Xiaoying;SONG Yifu;The supercritical carbon dioxide(S-CO2) cycle power generation technology uses CO2 as the working fluid.Compared with the Rankine cycle using water vapor as the working fluid, the S-CO2 cycle has high power generation efficiency, good flexibility, and small equipment and system size. Firstly, this paper introduced the S-CO2 cycle power generation technology from the aspects of technical principle, technical characteristics and overall research progress at home and abroad. Then, the research status of supercritical CO2 cycle power generation technology at home and abroad was mainly introduced from three aspects : working fluid characteristics, circulation system construction and key equipment.(1) In the research field of working fluid characteristics, there is no general or special physical property database of CO2 pure substance for power generation technology in China, which needs to break through the limitations of foreign counterparts.(2) In the field of closed cycle technology, the 5 MWe S-CO2 cycle power generation test unit has been built in China, which has the largest capacity and the highest parameters in the world. In the field of semi-closed cycle technology, the 25 MWe Allam cycle test unit built in the United States is currently the world 's largest unit.(3) In the key equipment of S-CO2 cycle, the aerodynamic design problem of S-CO2 turbine, the accurate design problem of near critical point of S-CO2 compressor and the high cost problem of S-CO2 printed circuit plate heat exchanger are the key directions to be overcome. In general, China has become a leading country in the research of S-CO2 cycle power generation technology in the world, but its commercial application conditions need to be further improved.
The major environmental problems and countermeasures of refuse incinerating power generation project
WEI Yong-jun,ZHU Geng-fuThe major environmental problems of refuse incinerating power generation project are studied from these aspects which include location selection of project,refuse storage,refuse incinerating and disposal of ash and slag,etc.Then the relevant control measures and suggestions are put forward.
Present situation and prospect of flue gas desulfurization techniques for coalfired power plants in China
HAO Hai-ling,ZHANG Rui-sheng,LI Ming-juThe paper gives a brief introduction on the present conditions of the emission and pollution of sulfur dioxide in China.The status of the coal desulfurization technology,low pollution burning technology and flue gas desulfurization(FGD) technology is explored from three stages of pre-burning,on-burning and post-burning.