北京热电公司1号机组脱硫系统GGH换热元件改造  

Heat exchange component transformation for GGH in desulfurization system of a thermal power plant

作　　者：胡秀丽[1] 刘丽梅[1] 傅文玲[2] 

机构地区：[1]神华北京国华电力有限责任公司,北京100025 [2]巴威公司北京代表处,北京100004

出　　处：《热力发电》2013年第8期153-155,共3页Thermal Power Generation

摘　　要：分析了北京热电分公司1号机组脱硫系统烟气-烟气换热器运行阻力过高的原因,认为其主要原因是脱硫系统烟气流量超过设计值,GGH换热元件板形选择不合理,烟气中灰的粘性增大,脱硫增压风机进、出口压力选择偏低。将1号机组脱硫系统GGH换热元件DNF薄钢波纹板改为L型大通道波纹板后,机组在各负荷工况下,均能保证净烟气温度达到设计值(>80℃),GGH运行阻力、增压风机电流均维持在较低水平;与改造前相比,锅炉满负荷运行时,净烟气出口温度为89℃,GGH单侧阻力为270Pa(设计<500Pa)条件下,GGH运行阻力下降了1.23kPa(单侧),增压风机电流下降了61A,运行电耗下降了550(kW·h)/h,日节电可达13 200kW·h。The running resistance in gas-gas heat(GGH)exchanger of desulfurization system of the No.1unit in Beijing Thermal Power Plant was too high.Several factors were considered as the main reasons,such as the excess gas flow in desulfurization system(compared with the design value),unreasonable strip shape selection for heat exchange component in GGH,increasing viscosity of ash in flue gas,and relatively low pressure at inlet and outlet of the desulfurization booster fan.Thus,transformation of heat exchange component in GGH was conducted.The DNF thin steel corrugated plate was changed into L type large channel corrugated plate.For the improved unit,the net gas temperature can reach the design value(>80℃),and the running resistance of the GGH and the booster fan current were both kept at a relatively low level,under various loads conditions.When the boiler ran with full load,under the condition that the net gas outlet temperature was 89℃and the resistance at one side of the GGH was 270Pa(design value <500Pa),the running resistance in GGH decreased by 1.23kPa(at one side);the booster fan current dropped by 61A;and the electricity consumption decreased by 550(kW.h)/ h.The daily saved electricity reached up to 13 200kW.h.

关 键 词：烟气脱硫 GGH压差 换热元件 GGH运行阻力 增压风机进、出口压力 

分 类 号：TK223[动力工程及工程热物理—动力机械及工程]