氨法脱硫在锅炉烟气净化中的应用
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摘要
采用一定浓度氨水为脱硫剂的氨法湿式烟气脱硫技术,是控制锅炉尾气排放中SO_2浓度的有效方法。介绍了氨法脱硫处理锅炉尾气的原理、工艺改造流程、主要设备及副产品等,简述了工艺改造后烟气脱硫系统、硫酸铵结晶脱水系统及工艺水系统的运行及能耗情况。结果表明:氨法脱硫技术具有反应速度快、脱硫效率高、副产品价值高等一系列优点;脱硫后锅炉装置尾气排放的SO_2和烟尘浓度均达到国家环保标准,系统SO_2脱除率达到95%,烟尘脱除率达到90%;每年还可副产硫酸铵约8 320 t;具有较好的环境效益、经济效益和社会效益。
Ammonia wet flue gas desulfurization technology with a certain concentration of ammonia as desulfurizer is an effective method to control the SO_2 concentration in boiler exhaust emissions. The principle,technological transformation process,main equipments and by-products of ammonia desulfurization for treating boiler exhaust emissions are introduced. The operation and energy consumption of flue gas desulfurization system,ammonium sulfate crystallization dehydration system and process water system are also briefly expounded. The results show that ammonia desulfurization technology has a series of advantages such as high reaction rate,high desulfurization efficiency and high by-product value. Concentration of SO_2 and dust in the boiler exhaust after desulfurization can meet the national environmental standard,with the removal rate of SO295% and dust 90%. The output of by-product ammonium sulfate is about 8 320 t per year. The ammonia desulfurization technology possesses good environmental benefit,economic benefit and social benefit.
Ammonia wet flue gas desulfurization technology with a certain concentration of ammonia as desulfurizer is an effective method to control the SO_2 concentration in boiler exhaust emissions. The principle,technological transformation process,main equipments and by-products of ammonia desulfurization for treating boiler exhaust emissions are introduced. The operation and energy consumption of flue gas desulfurization system,ammonium sulfate crystallization dehydration system and process water system are also briefly expounded. The results show that ammonia desulfurization technology has a series of advantages such as high reaction rate,high desulfurization efficiency and high by-product value. Concentration of SO_2 and dust in the boiler exhaust after desulfurization can meet the national environmental standard,with the removal rate of SO295% and dust 90%. The output of by-product ammonium sulfate is about 8 320 t per year. The ammonia desulfurization technology possesses good environmental benefit,economic benefit and social benefit.
引文
[1]钟秦.燃煤烟气脱硫脱硝技术及工程实例[M].北京:化学工业出版社,2002.
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[3]冯玲,杨景玲.烟气脱硫技术的发展及应用现状[J].环境工程,2007(2):19-24.
[4]涂晋林,吴志泉.化学工业中的吸收操作:气体吸收工艺与工程[M].上海:华东理工大学出版社,1994.
[5]BAI H,BISWAS P,KEENER T C.SO2removal by NH3gas injection:effects of temperature and moisture content[J].Ind Eng Chem Res,1994,33(5):1231-1236.
[6]TOCK R W,HOOVER K C,FAUST G J.SO2removal by transformation to solid crystals of ammonia complexes[J].AICh E Symp Ser,1979,75(188):62-82.
[7]郝吉明,王书肖,陆永琪.燃煤二氧化硫污染控制技术手册[M].北京:化学工业出版社,2001.
[8]王志轩,朱法华,刘思湄,等.火电二氧化硫环境影响与控制对策[M].北京:中国环境科学出版社,2002.
[9]孙克勤,钟秦.火电厂烟气脱硫系统设计、建造及运行[M].北京:化学工业出版社,2005.
[10]肖文德,袁渭康.洁净煤技术的新发展:一种火电厂SO2的资源化技术[J].中国工程科学,2000,2(5):77-83.
[11]程启生.某油田锅炉腐蚀结垢原因分析及防护对策研究[J].腐蚀科学与防护技术,2008,5(3):227.
[12]陈匡民.过程装备腐蚀与防护[M].北京:化学工业出版社,2002.
[2]闫晓光,熊理想,马宏金,等.FCL氨法烟气脱硫技术特点及应用[J].电力环境保护,2008,24(2):11-12.
[3]冯玲,杨景玲.烟气脱硫技术的发展及应用现状[J].环境工程,2007(2):19-24.
[4]涂晋林,吴志泉.化学工业中的吸收操作:气体吸收工艺与工程[M].上海:华东理工大学出版社,1994.
[5]BAI H,BISWAS P,KEENER T C.SO2removal by NH3gas injection:effects of temperature and moisture content[J].Ind Eng Chem Res,1994,33(5):1231-1236.
[6]TOCK R W,HOOVER K C,FAUST G J.SO2removal by transformation to solid crystals of ammonia complexes[J].AICh E Symp Ser,1979,75(188):62-82.
[7]郝吉明,王书肖,陆永琪.燃煤二氧化硫污染控制技术手册[M].北京:化学工业出版社,2001.
[8]王志轩,朱法华,刘思湄,等.火电二氧化硫环境影响与控制对策[M].北京:中国环境科学出版社,2002.
[9]孙克勤,钟秦.火电厂烟气脱硫系统设计、建造及运行[M].北京:化学工业出版社,2005.
[10]肖文德,袁渭康.洁净煤技术的新发展:一种火电厂SO2的资源化技术[J].中国工程科学,2000,2(5):77-83.
[11]程启生.某油田锅炉腐蚀结垢原因分析及防护对策研究[J].腐蚀科学与防护技术,2008,5(3):227.
[12]陈匡民.过程装备腐蚀与防护[M].北京:化学工业出版社,2002.