垃圾焚烧发电厂变频给水泵运行改造节能分析  

Energy Saving Analysis of Conversion Feed Pump Operation Transformation in Waste Incineration Power Plant

作　　者：陈海军 许睿 赵景才 龙吉生 CHEN Haijun;XU Rui;ZHAO Jingcai;LONG Jisheng(Shanghai SUS Environment Co.Ltd.,Shanghai 201703)

机构地区：[1]上海康恒环境股份有限公司,上海201703

出　　处：《环境卫生工程》2024年第3期59-63,共5页Environmental Sanitation Engineering

摘　　要：随着变频技术的逐渐成熟,垃圾焚烧发电厂的给水泵大都由定速给水泵替换为变频给水泵,但锅炉给水系统仍采用传统的给水控制逻辑,未能完全挖掘变频给水泵的节能潜力。通过对垃圾焚烧发电厂锅炉给水系统的整体分析,对原有的给水系统控制逻辑进行改造。单炉规模下,由变频给水泵直接控制汽包水位,给水调节阀全开,实现锅炉给水系统平均节电0.28 kWh/t,节电率为7.2%,每月单位给水能耗的方差由0.064下降至0.033,给水系统稳定性大幅增加,年节省电量109.5 MWh,折合碳减排量为62.45 tCO_(2);多炉规模下,变频给水泵母管压力跟随汽包压力变化而变化,实现给水系统平均节电0.29 kWh/t,节电率接近7.2%,平均单位给水方差下降约36%,给水系统稳定性得到大幅提高,年节省电量380.8 MWh,折合碳减排量为217.17 tCO_(2)。With the gradual maturity of frequency conversion technology,most of the feedwater pumps in waste incineration power plants were replaced by constant speed feedwater pumps with variable frequency feedwater pumps,but the boiler feedwater system still adopted traditional feedwater control logic,which failed to fully tap the energy saving potential of variable frequency feedwater pumps.Through the overall analysis of the boiler feed water system of waste incineration power plant,the control logic of the original feed water system was reformed.At a single boiler scale,the drum water level was directly controlled by the frequency conversion feed water pump,and the feed water control valve was fully open.The average power saving of the water supply system was 0.28 kWh/t,the power saving rate was 7.2%.The variance of monthly unit water supply energy consumption was reduced from 0.064 to 0.033,and the stability of the water supply system was greatly increased,annual power saving of 109.5 MWh,equivalent to carbon reduction of 62.45 tCO_(2).Under multiple boiler scales,the pressure of the main pipe of the variable frequency feed pump changed with the pressure of the drum.The average power saving of the water supply system was 0.29 kWh/t,the power saving rate was 7.2%.The average unit feedwater variance was reduced by about 36%,the stability of the water supply system was greatly improved,annual power saving was 380.8 MWh,equivalent to carbon reduction of 217.17 tCO_(2).

关 键 词：垃圾焚烧 变频给水泵 给水系统新逻辑 节能 

分 类 号：X799.3[环境科学与工程—环境工程]