Estimation of Soot and Airborne Radionuclide Emission Factors from Coal-Fired Power Plants in China
会议名称：《The Second Asian and Oceanic Congress for Radiation Protection》
会议日期：2006年
学科分类：083002[工学-环境工程] 0830[工学-环境科学与工程（可授工学、理学、农学学位）] 08[工学]
关 键 词：soot radionuclide emission factor coal-fired power plant
摘 要：As main energy resource in China, coal-fired power is one of the major causes of atmosphere pollution. Comparison of environment impacts for coal, nuclear and other energy provides important information for energy sustainable development decision-making. Study on soot and airborne radionuclide emission factors for coal-fired power plants is important part as atmosphere environment impacts of coal energy. Based on the data that effect soot emission, such as installed capacity, dust removal technique, boiler and combustion conditions of coal-fired power plant at present in China, three type emission levels （high, middle and low） of coal-fired plants are analyzed and the general soot emission factor is estimated with the result: 4.4g/kWh. It is much higher in China than foreign advanced countries’ level and the main reasons are: high energy consumption of electricity production, various levels of dust precipitation and low efficiency in whole, and some high pollution, low parameters and small capacity coal-fired plants still taking certain proportion. With soot some natural radionuclide and their descendant （U series, Th series and 40K） in coal emit to atmosphere. Based on collection and analysis of survey data and experiment results on radionuclide content in coal and coal-fired ashes, the airborne radionuclide emission factors are estimated with the results: 226Ra is 0.68Bq/kWh, 232Th is 0.56Bq/kWh, 238U is 0.74Bq/kWh, 210Pb is 3.54Bq/kWh, 210Po is 2.79Bq/kWh and 40K is 1.34Bq/kWh, which perform the practical emission level for coal-fired power plant in China.