火电厂辅机变频改造可行性研究
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摘要
随着我国国民经济的发展,科学发展观、可持续发展、建设集约型社会得到了党中央、国务院的高度关注和大力提倡,并把节约优先、效率为本作为我国能源政策的首要任务。电网迅速发展,对机组的调峰能力要求越来越高,调节辅机以适应电力安全、经济运行,直接影响到电厂的安全性和发电成本,许多国内发电厂采用了变频技术进行技术改造,并取得了很好的效果。
本论文根据电厂的现有运行情况,参照国内类似300MW机组的节能技术改造情况,对某电厂内部的部分主要辅机设备(包括氧化风机、增压风机、引风机、一次风机和凝结水泵等)的变频改造进行可行性研究,以达到降低电厂发电标煤耗、减轻环境污染、节约用水、节约厂用电的目的,以改造换节能、以节能换效益,不仅技术上先进可行,而且将带来良好的社会效益和节约效益。
从投资估算和财务评价可知,该改造项目总投资为3928万元,技术改造项目完成后,每年可产生的总节能收益为2439.251万元,电厂的发电标煤耗将由原来的325.6g/kW·h降低为322.33g/kW·h,预计每年将节约标煤量约2.5481万吨,可减少SO_2排放量约22.4542吨,可减少烟尘排放量约2.8064吨,减少灰渣排放量约0.6033万吨。
因此,该改造项目采用先进可行的节能技术改造技术,其节能技术改造效益显著,经济可行且具有良好的抗风险能力。
Along with the development of our National Economic, the scientific outlook on development. Sustainable development and building the intensive society have been paid high attention and sparkplug vigorously by the Party's Central Committee and the State Department. And the priority to saving and putting efficient as the root are the principal task of the policy of our energy sources. With the development of the power network, the ability of peak load regulation of the units is required higher and higher. To regulate the auxiliary machine to adapt for the safe and economical operation of the power plant will effect directly the safety and the generation cost of the power plant. The frequency conversion transformation technology is been adopted in many power plants in domestic, and gain good effect.
In this paper, according to the condition of the power plant and refer to the technology transformation condition of the similar 300MW units in domestic, I took the feasibility study of frequency conversion transformation for the auxiliary equipment, including precipitator, oxidation fan, pressure fan, draft fan, primary air fan and condensate pump, to gain the goal of decreasing the standard coal consumption rate for generation, lightening the environment pollution, saving water and service power. That, to gain energy saving from reconstruction and gain benefit from energy saving, is not only advanced and feasible on technique, but also will bring upstanding social benefits and saving benefits.
From the investment estimation and the financial evaluation, the total investment is 39280 thousand RMB, and after the compliment of the reconstruction, the standard coal consumption rate for generation will be reduced to 322.33g/kWh from 325.6 g/kWh, and 25.481 thousand tons of standard coal will be saved. Furthermore, the discharge amount of SO_2, soot and slag will be decreased to 22.4542 tons, 2.8064 tons and 6033 tons for each.
Therefore, The feasible economically advanced technology is been adopted in this renovation project, and it will bring remarkable benefit with good anti-risk ability.
本论文根据电厂的现有运行情况,参照国内类似300MW机组的节能技术改造情况,对某电厂内部的部分主要辅机设备(包括氧化风机、增压风机、引风机、一次风机和凝结水泵等)的变频改造进行可行性研究,以达到降低电厂发电标煤耗、减轻环境污染、节约用水、节约厂用电的目的,以改造换节能、以节能换效益,不仅技术上先进可行,而且将带来良好的社会效益和节约效益。
从投资估算和财务评价可知,该改造项目总投资为3928万元,技术改造项目完成后,每年可产生的总节能收益为2439.251万元,电厂的发电标煤耗将由原来的325.6g/kW·h降低为322.33g/kW·h,预计每年将节约标煤量约2.5481万吨,可减少SO_2排放量约22.4542吨,可减少烟尘排放量约2.8064吨,减少灰渣排放量约0.6033万吨。
因此,该改造项目采用先进可行的节能技术改造技术,其节能技术改造效益显著,经济可行且具有良好的抗风险能力。
Along with the development of our National Economic, the scientific outlook on development. Sustainable development and building the intensive society have been paid high attention and sparkplug vigorously by the Party's Central Committee and the State Department. And the priority to saving and putting efficient as the root are the principal task of the policy of our energy sources. With the development of the power network, the ability of peak load regulation of the units is required higher and higher. To regulate the auxiliary machine to adapt for the safe and economical operation of the power plant will effect directly the safety and the generation cost of the power plant. The frequency conversion transformation technology is been adopted in many power plants in domestic, and gain good effect.
In this paper, according to the condition of the power plant and refer to the technology transformation condition of the similar 300MW units in domestic, I took the feasibility study of frequency conversion transformation for the auxiliary equipment, including precipitator, oxidation fan, pressure fan, draft fan, primary air fan and condensate pump, to gain the goal of decreasing the standard coal consumption rate for generation, lightening the environment pollution, saving water and service power. That, to gain energy saving from reconstruction and gain benefit from energy saving, is not only advanced and feasible on technique, but also will bring upstanding social benefits and saving benefits.
From the investment estimation and the financial evaluation, the total investment is 39280 thousand RMB, and after the compliment of the reconstruction, the standard coal consumption rate for generation will be reduced to 322.33g/kWh from 325.6 g/kWh, and 25.481 thousand tons of standard coal will be saved. Furthermore, the discharge amount of SO_2, soot and slag will be decreased to 22.4542 tons, 2.8064 tons and 6033 tons for each.
Therefore, The feasible economically advanced technology is been adopted in this renovation project, and it will bring remarkable benefit with good anti-risk ability.
引文
[1]于屹,何未茹.变频调速装置在电力系统中的应用调查.国际电力,2002,6(1):28-30.
[2]汪洋.浅谈火电厂的变频调速技术及其市场前景.电力需求侧管理,2004,6(4):35-36.
[3]蒋涛.高压交流异步电动机调速方式的技术经济性分折.山东电力技术,2000,(6):38-39.
[4]陈振华.变频调速在容克式空气预热器上的应用.发电设备,2000,(6):20-21.
[5]李庆.变频技术在火电厂辅机上的应用.上海电力,2006,(2):130-133.
[6]车长源.锅炉风机节能技术.北京:中国电力出版社.1999,28-35.
[7]徐甫容.发电厂风机水泵变频调速节能改造路在何方.变频器世界,2004,(4):25.
[8]米子德.发电机组变频一次风机的经济性及可靠性分析.华北电力技术,2002,(9):38
[9]郭庆华.风机变频改造节能技术的应用.风机技术,2005,2:70-73.
[10]李明,黄玉维,朱光明,焦庆丰.火电厂泵与风机变频改造技术及应用.华电技术,2008,8:47-48.
[11]蒋多晖.火电厂大功率辅机电动机变频技术研究与应用.[硕士学何论文],合肥工业大学:电气工程学,2007:4-5,26-29.
[12]王卫宏等.风机高压变频改造的节能预算方法与实践.中国电力.2006,9:71-73.
[13]吴民强.泵与风机节能技术问答[M].北京:中国电力出版社.1998,55-63.
[14]杨诗成,王喜魁.泵与风机(第2版)[M].北京:中国电力出版社.2004,22-25.
[15]郭立君,何川.泵与风机(第3版)[M].北京:中国电力出版社.2004,12-14.
[16]熊康军.华豫电厂凝结水泵变频改造.热力发电,2008,08:57-61.
[17]徐志强.火电厂300MW机组引风机变频改造.能源研究与利用,2008,1:47-48.
[18]陈立功,胡庆伟.高压变频器在电厂引风机上应用应注意的问题.华中电力,2004,04:49-51.
[19]丁仰春,孙艳荣等.HARSVERT-A高压变频器在电厂引风机上的应用.工业控制计算机,2008,21卷第8期:86-87.
[20]吴忠智、吴加林.中(高)压大功率变频器应用手册.北京,机械工业出版社.2003年,78-79.
[21]吴加林.IGBT直接串联高压变频器.电工技术杂志.2003(2),85-88.
[24]韩安荣.通用变频器及其应用[M].2版.北京:机械工业出版社.2003,45-46.
[25]郭程.给水泵变频调速改造一例[J].热力发电,2007,(7):44-46
[26]田建旭,谢国强.高压变频技术在锅炉送风机上的应用[J].风机技术,2003,(3):38-40.
[27]徐甫荣、崔力.发电厂辅机电动机变频调速节能方案探讨.变频器世界,2001,32-34.
[28]王贺芩,邹文华,等.风机变频改造节能技术在火电厂的应用[J].中国电力,2002,(2):12.
[29]丁娘藤.变频技术在锅炉引风机上的应用及节能分析[J].广东电力,2007,20(7):25-29.
[30]张振阳.高压变频技术在火电厂吸风机中的应用与研究[J].热能动力工程,2002,17(2):191-194.
[31]姚锡禄.变频器控制技术与应用(?).福州:福建科学技术出版社.2005,35-38.
[32]黄元培,张学.变频器应用技术及电动机调速.北京:人民邮电出版社.1998,68-70.
[32]Jih-Sheng Lai,Fang Zheng Peng." Multilevel converters--A new breed of powerconverters".IEEE Trans.on Industry Applications,VOL.32,NO.3,May/Jun,1996:87-91.
[33]Kawata.F.Ueda.Application of parallel connected NPC.PWM inverters withmultilevel modulation for AC motor drive.IEEE Transactions on Power Electronics,2000.15(5):901-907.
[34]Matsui.Y.Kawata.T.Yamaguchi,et al.Multilevel modulations for parallelconnected NPC-PWMinverters.Proceedings of 1997 International Conference on PowerElectronics and DriveSystems,1997,VOl.2:876-881.
[2]汪洋.浅谈火电厂的变频调速技术及其市场前景.电力需求侧管理,2004,6(4):35-36.
[3]蒋涛.高压交流异步电动机调速方式的技术经济性分折.山东电力技术,2000,(6):38-39.
[4]陈振华.变频调速在容克式空气预热器上的应用.发电设备,2000,(6):20-21.
[5]李庆.变频技术在火电厂辅机上的应用.上海电力,2006,(2):130-133.
[6]车长源.锅炉风机节能技术.北京:中国电力出版社.1999,28-35.
[7]徐甫容.发电厂风机水泵变频调速节能改造路在何方.变频器世界,2004,(4):25.
[8]米子德.发电机组变频一次风机的经济性及可靠性分析.华北电力技术,2002,(9):38
[9]郭庆华.风机变频改造节能技术的应用.风机技术,2005,2:70-73.
[10]李明,黄玉维,朱光明,焦庆丰.火电厂泵与风机变频改造技术及应用.华电技术,2008,8:47-48.
[11]蒋多晖.火电厂大功率辅机电动机变频技术研究与应用.[硕士学何论文],合肥工业大学:电气工程学,2007:4-5,26-29.
[12]王卫宏等.风机高压变频改造的节能预算方法与实践.中国电力.2006,9:71-73.
[13]吴民强.泵与风机节能技术问答[M].北京:中国电力出版社.1998,55-63.
[14]杨诗成,王喜魁.泵与风机(第2版)[M].北京:中国电力出版社.2004,22-25.
[15]郭立君,何川.泵与风机(第3版)[M].北京:中国电力出版社.2004,12-14.
[16]熊康军.华豫电厂凝结水泵变频改造.热力发电,2008,08:57-61.
[17]徐志强.火电厂300MW机组引风机变频改造.能源研究与利用,2008,1:47-48.
[18]陈立功,胡庆伟.高压变频器在电厂引风机上应用应注意的问题.华中电力,2004,04:49-51.
[19]丁仰春,孙艳荣等.HARSVERT-A高压变频器在电厂引风机上的应用.工业控制计算机,2008,21卷第8期:86-87.
[20]吴忠智、吴加林.中(高)压大功率变频器应用手册.北京,机械工业出版社.2003年,78-79.
[21]吴加林.IGBT直接串联高压变频器.电工技术杂志.2003(2),85-88.
[24]韩安荣.通用变频器及其应用[M].2版.北京:机械工业出版社.2003,45-46.
[25]郭程.给水泵变频调速改造一例[J].热力发电,2007,(7):44-46
[26]田建旭,谢国强.高压变频技术在锅炉送风机上的应用[J].风机技术,2003,(3):38-40.
[27]徐甫荣、崔力.发电厂辅机电动机变频调速节能方案探讨.变频器世界,2001,32-34.
[28]王贺芩,邹文华,等.风机变频改造节能技术在火电厂的应用[J].中国电力,2002,(2):12.
[29]丁娘藤.变频技术在锅炉引风机上的应用及节能分析[J].广东电力,2007,20(7):25-29.
[30]张振阳.高压变频技术在火电厂吸风机中的应用与研究[J].热能动力工程,2002,17(2):191-194.
[31]姚锡禄.变频器控制技术与应用(?).福州:福建科学技术出版社.2005,35-38.
[32]黄元培,张学.变频器应用技术及电动机调速.北京:人民邮电出版社.1998,68-70.
[32]Jih-Sheng Lai,Fang Zheng Peng." Multilevel converters--A new breed of powerconverters".IEEE Trans.on Industry Applications,VOL.32,NO.3,May/Jun,1996:87-91.
[33]Kawata.F.Ueda.Application of parallel connected NPC.PWM inverters withmultilevel modulation for AC motor drive.IEEE Transactions on Power Electronics,2000.15(5):901-907.
[34]Matsui.Y.Kawata.T.Yamaguchi,et al.Multilevel modulations for parallelconnected NPC-PWMinverters.Proceedings of 1997 International Conference on PowerElectronics and DriveSystems,1997,VOl.2:876-881.