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Technology about dry desulfurization and semi-dry desulfurization
In this paper,the process principle,reaction process,influencing factors and application range of dry and semi-dry desulfurization technology are introduced,and the advantages and disadvantages of different processes are analyzed.The water consumption of semi-dry desulfurization technology and wet desulfurization technology are compared,and the limitations of the application of dry and semi-dry desulfurization technology are put forward.
Detection methods of hydroxyl radicals
Advanced oxidation Processing(AOP) is a new kind of oxidation process technology.The hydroxyl radical is an important intermedium of this process.The hydroxyl radical is an efficient and environmental friendly oxidant which has great oxidability.It lists some detections of hydroxyl radical,include Electron Spin Resonance(ESR),Higher Performance Liquid Chromatography(HLPC),Spectrophotometry,Fluorescence Spectrophotometry(FD) and so on.These methods will provide a technology assistant for detecting hydroxyl radicals and play an important role in the direction of the future research.
Opportunities and challenges of coal power industry in the achievement of carbon neutrality goal
ZHU Fahua;XU Jingxin;PAN Chao;WANG Sheng;ZHAO Xiuyong;TIAN Wenxin;SUN Xueli;ZHANG Xi;LI Hui;BAI Yuan;DONG Yuehong;Under the goal of carbon neutrality, Chinese coal power industry has encountered unprecedented development pressure, It is urgent to explore a development path that can not only meet the needs of the energy system but also take into account carbon emission reduction policies. This paper first expounded the opportunities of Chinese coal power industry to achieve carbon neutrality goal from three aspects: the position of fossil energy in global energy consumption, the position of coal in Chinese fossil energy, and the position of coal power in Chinese power industry. Then it sorted out the challenges faced by Chinese coal power industry in achieving the carbon neutrality goal from four aspects: clean and low carbonization, in-depth adjustment and flexibility, functional diversification and intelligent energy. The main results show that: 1) Fossil energy accounts for more than 80% of global energy consumption, as is the case in many developed countries, which is still the main energy source. It is predicted that Chinese coal consumption in 2030 and 2050 will account for 45% and no more than 24% of primary energy consumption, respectively, accounting for the highest proportion of a single type of energy. Coal will remain the ballast stone for Chinese energy security and stable supply in a long period of time. It is difficult to change the status of Chinese coal power in the power supply guarantee in the short term. By 2060, it may still need to retain about 500 million kW of coal power installed capacity to ensure energy security. 2) The realization of clean and low carbonization in coal-fired power plants is the primary challenge for China to achieve carbon neutrality. It is necessary to gradually demonstrate and promote the low carbon-zero carbon-negative carbon technology of coal-fired power plants,which is mainly reflected in: I) 50. 5% of the subcritical and below coal-fired power units will achieve low-carbon emission reduction through energy-saving and consumption-reducing upgrades and the elimination and shutdown of outdated units. II) The most advanced coal-fired power units will be mixed with 30% biomass fuel,which can achieve the same carbon emission per unit of power supply as gas-fired power plants,and they will be achieve zero carbon emissions until all biomass fuels are replaced. III) Demonstration application of biomass-carbon capture and storage( BECCS) technology will achieve negative carbon emissions from coal power units. The above approaches can help build a new type of power system with Chinese characteristics with new energy as the main body,supporting the green,low-carbon and high-quality energy development,which ensure national energy security and achieve carbon neutrality successfully.
Present condition and development trend of dam safety monitoring technologies
CHEN Wen-yan,ZHU Lin,WANG Wen-taoThe connotation and further meaning of dam safety are illustrated.The present condition and development trend of the dam safety monitoring are discussed from four aspects: the content,thinking pattern,analytical methods and techniques.It draws a conclusion that the dam safety monitoring will be development towards automatization,digitization,integration and beneficialization.
Review on ammonia flue gas desulfurization
Ammonia scrubbing technology has been developed over the last few years. Wet ammonia flue gas desulfu-rization(FGD) process offers an unique advantage of an attractive ammonium sulfate by-product that can be used as fertilizer.
Discussion on the application of the SCR technology in coal-fired power plants
SCR DeNOx technology is applied widely and successfully in power plants.It is one of the most mature and broad-used DeNOx technologies in the world. SCR process principles is introduced.The constitutions of SCR system are analyzed.Some specific recommendations are put forward.
Review of urban waste disposition
WANG Fengchun,TIAN Xinshan,CAI GuangyuThe ways of waste disposition in China cities at present are discussed,the advantages,disadvantages and appropriateness are analyzed and compared.The emphasis is put on the electricity generation by burning waste and its relevant problems
The progress in pollution control of volatile organic compounds
The source,variety and health impact of volatile organic compounds(VOCS) were summarized.The industrial emission control technologies were sketched.The research status of photocatalysis oxidation in low-level VOC treatment was introduced and the future development of this method in indoor air purification was put forward.