燃煤电站锅炉空预器高声强声波吹灰器应用效果分析  

Application Analysis of Air-pre-high-sound-wave Soot Blower for Coal-fired Boiler in Power Plant

作　　者：黄雪松 冯美荣 蒋华 李容基 冯泳翔 HUANG Xue-song;FENG Mei-rong;JIANG Hua;LI Rong-ji;FENG Yong-xiang(State Power Investment Corporation Limited,Beijing 100034,China;China Power Shentou Power Generation Co.,Ltd.,Shuozhou 036800,China;Nanjing Changrong Acoustic Inc.,Nanjing 210008,China;Taiyuan University of Technology,Taiyuan 030024,China)

机构地区：[1]国家电力投资集团有限公司,北京100034 [2]中电神头发电有限责任公司,山西朔州036800 [3]南京常荣声学股份有限公司,南京210008 [4]太原理工大学,太原030024

出　　处：《电力学报》2021年第6期548-556,共9页Journal of Electric Power

摘　　要：某电厂600 MW机组燃煤锅炉的空气预热器存在堵灰问题,对其进行改造时,在原有蒸汽吹灰器的基础上增加了一种可调频高声强声波吹灰系统,根据该锅炉空预器实际尺寸和设备情况,确定该系统由4个可调频高声强声波吹灰器组成。具体是在空预器的A/B侧各加装两台,分别安装于烟气侧热端和二次风侧冷端,顺气流方向安装,实现对600 MW火电机组锅炉空预器进行吹灰解垢。在高声强声波吹灰系统投运3个月后,对比分析了600 MW、300 MW负荷工况下,空预器投运前后运行数据。根据2021年DCS数据,负荷600 MW时,两台空预器出入口烟气压差,在未投用声波吹灰时平均为2.6 kPa,投用声波吹灰后平均为2.1 kPa,降低19.2%。负荷300 MW时,两台空预器烟气出入口压差,在未投用声波吹灰时平均为1.2 kPa,投用声波吹灰时平均为0.9 kPa,降低25.0%。负荷600 MW时,在声波吹灰系统投用前与投用后的数据对比中,1#空预器出入口烟气温降减少2.29℃,空气温升增加0.99℃;2#空预器出入口烟气温降减少1.29℃,空气温升增加0.45℃。负荷300 MW时,在声波吹灰系统投用前与投用后的数据对比中,1#空预器出入口烟气温降减少1.51℃,空气温升增加1.23℃;2#空预器出入口烟气温降减少0.81℃,空气温升增加0.31℃。运行效果表明,采用高声强声波吹灰系统明显降低了空预器进出口压差,保证了引、送风机正常出力,节能降耗作用显著。There was ash clogging problem in the air preheater of 600 MW coal-fired boiler in a power plant During the reform,a frequency modulated high sound intensity acoustic soot blower system was added on the ba⁃sis of the original steam soot blower.According to the actual size and equipment of the boiler air preheater,it was determined that the system composed of four frequency modulated high sound intensity acoustic soot blow⁃ers.Specifically,two air preheaters were installed on the A/B side of the air preheater,which were respectively installed at the heat end of the flue gas side and the cold end of the secondary air side,and installed along the air flow direction to realize soot blowing and descaling of the boiler air preheater of 600 MW thermal power unit.The operation data of air preheater under 600 MW and 300 MW load condition were compared and analyzed af⁃ter three months of operation of high sound intensity acoustic soot blowing system.When the load was 600 MW,the pressure difference at the inlet and outlet of the flue gas of the two air preheaters was 2.6 kPa on average when acoustic soot blowing was not put into operation,and 2.1 kPa on average after acoustic soot blowing put into operation,a decrease of 19.2%.When the load was 300 MW,the pressure difference at the inlet and outlet of the flue gas of the two air preheaters was 1.2 kPa when acoustic soot blowing was not put into operation,and 0.9 kPa when acoustic soot blowing was put into operation,reducing by 25.0%.According to the DCS data in 2021,when the load was 600 MW,compared with the data before and after the operation of the acoustic soot blowing system,the temperature drop of flue gas at the inlet and outlet of 1#air preheater decreases by 2.29℃,and the temperature rise of air increases by 0.99℃;The flue gas temperature drop at the inlet and outlet of 2#air preheater decreases by 1.29℃,and the air temperature rise increases by 0.45℃.When the load was 300 MW,compared with the data before and after the operation of the acoustic soot bl

关 键 词：火电厂 空预器 声波吹灰 应用分析 

分 类 号：TK14[动力工程及工程热物理—热能工程]