协同颗粒物脱除和水分回收的电站锅炉烟气余热利用系统  

A FLUE GAS WASTE HEAT UTILIZATION SYSTEM COORDINATE WITH PARTICULATE MATTERS REMOVAL AND WATER RECOVERY

作　　者：李斌[1] 王金平[1,2] 安连锁 LI Bin;WANG Jin-ping;AN Lian-suo(School of Energy,Power and Mechanical Engineering,North China Electric Power University,Baoding 071003,China;National Energy Investment Group Co.,Ltd,Beijing 100034,China)

机构地区：[1]华北电力大学能源动力与机械工程学院,河北保定071003 [2]国家能源投资集团有限公司,北京100034

出　　处：《环境工程》2018年第10期179-183,共5页Environmental Engineering

基　　金：国家科技支撑计划项目“电站锅炉排烟余热及水分回收技术研究”(2010BAA07B01)

摘　　要：应用蒸汽相变技术与氟塑料换热器,设计了协同颗粒物脱除和水分回收的电站锅炉烟气余热利用系统。系统在脱硫塔进、出口设置两级间接传热式烟气冷却器,氟塑料换热器吸收的排烟余热通过闭式循环水和板式换热器传递给凝结水。一级烟气冷却器降低脱硫塔入口烟温以减小脱硫水耗,二级烟气冷却器冷凝烟气中的水蒸气并脱除烟气中的颗粒物。将系统应用于某330 MW燃煤机组,在额定负荷可降低发电煤耗率为3.09 g/(kW·h),回收冷凝水为6.4 t/h,降低颗粒物浓度至8.08 mg/m^3;连续运行9个月,可节约77%的脱硫系统用水。A flue gas waste heat utilization system for particulate matters removal and water recovery for coal-fired power plant was proposed based on the fluoro plastic heat exchanger and vapor condensation technology. The system consisted of two indirect gas coolers which arranged at the inlet and the outlet of the desulphurizing tower respectively. The coupling fluid went through the plastic heat exchanger and recovered the heat from the flue gas, then it flowed into the metallic plate heat exchanger and transfer the heat to the feedwater. The inlet gas temperature of the desulphurizing tower was reduced by the first gas cooler to decline the water consumption of desulphurization. The steam in the flue gas was condensed by the cooling of the second gas cooler and the particulate matters were removed simultaneously. The system was applied to a 330 MW coal fired power plant. For the 330 MW loads, coal consumption was decreased by 3.09 g/（kW·h）, the condensation water was recovered by 6.4 t/h, and the particulate matters were reduced to 8.08 mg/m^3. During operation for nine months, the system saved about 77% water of desulphurization system.

关 键 词：电站锅炉 余热利用 协同脱除 水分回收 颗粒物 氟塑料换热器 

分 类 号：TM621[电气工程—电力系统及自动化] X773[环境科学与工程—环境工程]