Design And Implementation Of Desulfurization Technology For A 1000MW Coal-fired Unit

Shenhua Guohua Shouguang power generation limited liability company(hereinafter referred to as the "longevity"), according to the state environmental protection department on July 29,2011 release of the thermal power plant air pollutant emission standards GB-13223-2011, implement emission classification.Electric Shou at Yangkou town of Shouguang City, Shandong Province, is the focus of emission area implementation of the coal-fired boiler emission standards, soot is equal to or less than 20 mg / m3, the sulfur dioxide is equal to or less than 50 mg / m3,and less than or equal to 100 mg / m3 of nitrogen oxides emission limit. In order to meet the requirements of the national environmental pollutant emissions requirements, Shou Electrical Engineering 2 * 1000 MW unit flue gas environmental protection equipment, using 1 level of low temperature economizer + 5 field dry electrostatic precipitator(high power) + 2 level low temperature economizer +limestone gypsum wet desulphurization(without GGH) + 1 field wet electric dust collector design, in coal into the furnace sulfur is equal to or less than 1458mg/Nm3 under the condition of, desulfurization efficiency is greater than or equal to 99.32%.Design of flue gas emissions values satisfy, chimney outlet SO2 content is less than or equal to 10 mg / Nm3, smoke less than or equal to 3mg/Nm3 goals.This paper mainly focuses on the analysis of wet desulfurization, desulfurization,semi dry desulfurization technology to carry out their respective comparative advantages and disadvantages, selection of desulfurization technology. According to the selection principle of the desulfurization technology, the advantages outweigh the disadvantages, determine the use of limestone- gypsum wet desulphurization technology, wet flue gas de sulfur dioxide absorption core system and equipment configuration around the same time, with the same type of domestic power plant wet desulfurization of flue gas temperature, the amount of smoke and dust, slurry circulation, flue gas velocity, liquid gas ratio and the influence factors of desulfurization efficiency is discussed in view of the above, the key factors affecting the desulfurization efficiency in optimization design, the realization of SO2 content is less than 10mg/Nm3, the emission performance reached more than 0.16mg/kwh, than the same type of domestic thermal power plant emissions, to achieve efficient desulfurization system in a million the implementation and application of the unit.