This paper analyzes 9 essentials in trial collecting SO2 emission charges based on the relevant legislative policies, summarizes and analyzes the actual practices of collecting and using SO2 emission charges in power ...This paper analyzes 9 essentials in trial collecting SO2 emission charges based on the relevant legislative policies, summarizes and analyzes the actual practices of collecting and using SO2 emission charges in power industry, and combining the status of power system reform, puts forward some recommendations about reasonably collecting and using SO2 emission charges and prompting power plants to take measures of desulfurization.展开更多
A supercritical CO2 gas turbine cycle can produce power at high efficiency and the gas turbine is compact compared with the steam turbine. Therefore, it is very advantageous power cycle for the medium temperature rang...A supercritical CO2 gas turbine cycle can produce power at high efficiency and the gas turbine is compact compared with the steam turbine. Therefore, it is very advantageous power cycle for the medium temperature range less than 650 ℃. The purpose of this paper is to show how it can be effectively applied not only to the nuclear power but also to the fossil fired power plant. A design of 300 MWe plant has been carried out, where thermal energy of flue gas leaving a CO2 heater is utilized effectively by means of economizer and a high cycle thermal efficiency of 43.4 % has been achieved. Since the temperature and the pressure difference of the CO2 heater are very high, the structural design becomes very difficult. It is revealed that this problem can be effectively solved by introducing a double expansion turbine cycle. The component designs of the CO2 heater, the economizer, supercritical CO2 turbines, compressors and the recuperators are given and it is shown that these components have good performances and compact sizes.展开更多
With the rapid development of electricity production, SO 2 from coal fired power stations causes severe air pollution problem. In 1997, the SO 2 emitted from thermal power plants reached 7.0 Mt, accounting for abou...With the rapid development of electricity production, SO 2 from coal fired power stations causes severe air pollution problem. In 1997, the SO 2 emitted from thermal power plants reached 7.0 Mt, accounting for about 33% of the national emissions. At present and in the future, thermal power stations will still be the primary pollution sources. The Chinese government and power departments accord considerable importance to the SO 2 emissions from thermal power plants. New sets of environmentally friendly policies have been formulated. But, enforcement of laws and regulations needs to be further improved and broadened, especially those responding to market conditions. This paper focuses particular attention on the analysis of strategy, policies, and measures that have been or should be taken against SO 2 emissions from thermal power plants so as to achieve the environmental protection targets, on the basis of which the technical options for the future are given.展开更多
文摘This paper analyzes 9 essentials in trial collecting SO2 emission charges based on the relevant legislative policies, summarizes and analyzes the actual practices of collecting and using SO2 emission charges in power industry, and combining the status of power system reform, puts forward some recommendations about reasonably collecting and using SO2 emission charges and prompting power plants to take measures of desulfurization.
文摘A supercritical CO2 gas turbine cycle can produce power at high efficiency and the gas turbine is compact compared with the steam turbine. Therefore, it is very advantageous power cycle for the medium temperature range less than 650 ℃. The purpose of this paper is to show how it can be effectively applied not only to the nuclear power but also to the fossil fired power plant. A design of 300 MWe plant has been carried out, where thermal energy of flue gas leaving a CO2 heater is utilized effectively by means of economizer and a high cycle thermal efficiency of 43.4 % has been achieved. Since the temperature and the pressure difference of the CO2 heater are very high, the structural design becomes very difficult. It is revealed that this problem can be effectively solved by introducing a double expansion turbine cycle. The component designs of the CO2 heater, the economizer, supercritical CO2 turbines, compressors and the recuperators are given and it is shown that these components have good performances and compact sizes.
文摘With the rapid development of electricity production, SO 2 from coal fired power stations causes severe air pollution problem. In 1997, the SO 2 emitted from thermal power plants reached 7.0 Mt, accounting for about 33% of the national emissions. At present and in the future, thermal power stations will still be the primary pollution sources. The Chinese government and power departments accord considerable importance to the SO 2 emissions from thermal power plants. New sets of environmentally friendly policies have been formulated. But, enforcement of laws and regulations needs to be further improved and broadened, especially those responding to market conditions. This paper focuses particular attention on the analysis of strategy, policies, and measures that have been or should be taken against SO 2 emissions from thermal power plants so as to achieve the environmental protection targets, on the basis of which the technical options for the future are given.
