脱硫废水蒸发系统对燃煤电厂水平衡及氯平衡的影响  

Effect of Desulfurization Wastewater Evaporation System on Water and Chlorine Balance of Power Plant

作　　者：于航 梁达扬 余子炎[1] 陈恒 林理量 赵宁 孙宗康 杨林军[3] YU Hang;LIANG Dayang;YU Ziyan;CHEN Heng;LIN Liliang;ZHAO Ning;SUN Zongkang;YANG Linjun(Guangdong Honghaiwan Power Generation Co.,Ltd.,Shanwei 516623,Guangdong Province,China;Ningbo Tech University,Ningbo 315000,Zhejiang Province,China;Key Laboratory of Energy Thermal Conversion and Control of Ministry of Education,Southeast University,Nanjing 210096,China;China Southern Power Grid Electric Power Technology Co.,Ltd.,Guangzhou 510080,China;Guangdong Energy Group Co.,Ltd.,Guangzhou 525000,China)

机构地区：[1]广东红海湾发电有限公司,广东汕尾516623 [2]浙大宁波理工学院,浙江宁波315000 [3]东南大学能源热转换及其过程测控教育部重点实验室,南京210096 [4]南方电网电力科技股份有限公司,广州510080 [5]广东电力发展股份有限公司,广州525000

出　　处：《动力工程学报》2024年第12期1935-1940,1947,共7页Journal of Chinese Society of Power Engineering

基　　金：广东电力发展股份有限公司科技资助项目(YDL-PY-22002)。

摘　　要：以某电厂脱硫废水旁路蒸发系统作为研究对象,全面分析了该系统对全厂水平衡及氯平衡的影响。结果表明:废水蒸发造成脱硫塔入口烟气温度降低2~5 K,且可在一定程度上降低工艺水的用量;旁路蒸发系统投运后,约有3%氯离子再释放为气态HCl,造成干燥塔出口氯质量浓度提升至75.6 mg/m^(3);剩余的氯引入飞灰中,造成主烟道飞灰中氯质量分数上升至1 mg/g;虽然飞灰中氯含量有所增加,但对电厂粉煤灰综合利用的影响十分有限。Using the desulfurization wastewater bypass evaporation system of a power plant as the study object,the effect of the system on water and chlorine balance of the whole plant was comprehensively analyzed.Results show that wastewater evaporation causes a temperature drop of 2-5 K in the flue gas at inlet of desulfurization tower,and reduces the usage of process water to a certain degree.After the commissioning of the bypass evaporation system,about 3%of the chloride ions are released as gaseous HCl,causing the increase of mass concentration of chlorine to 75.6 mg/m^(3)at outlet of the dry tower.The residual chlorine is introduced into the fly ash,resulting in the increase of mass fraction of chlorine in fly ash of main flue to 1 mg/g.Although the chlorine content in fly ash is increased,the effect on the comprehensive utilization of fly ash in power plant is very limited.

关 键 词：脱硫废水 蒸发 水平衡 氯平衡 

分 类 号：X773[环境科学与工程—环境工程]