城市中水在火力发电厂的应用  

Application of Urban Reclaimed Water in Thermal Power Plants

作　　者：张瀚升 ZHANG Hansheng(Shangwan Thermal Power Plant,CHN Energy Beijing Guodian Power Co.,Ltd.,Ordos,Inner Mongolia 017209)

机构地区：[1]国家能源集团北京国电电力有限公司上湾热电厂,内蒙古鄂尔多斯017209

出　　处：《能源科技》2024年第6期92-96,共5页Energy Science and Technology

摘　　要：城市中水中含有COD、BOD_(5)、溶解固形物、浊度、氨氮、总磷、难溶盐等复杂成分,细菌含量高、不稳定,易造成水处理系统腐蚀、结垢、滋生微生物黏泥使膜系统污染等问题。为避免产生上述问题,须开展城市中水絮凝小型试验工作,确定最佳絮凝剂浓度。以最佳絮凝剂浓度为基础,进行助凝剂小型试验,确定最佳助凝剂浓度;根据水中细菌总数对杀菌剂用量进行试验调整,选择最优投加比例。各药剂浓度量确定后对机加池运行进行调整,机加池絮凝剂、助凝剂加入,沉降比、出水浊度按照制定的优化调整方案监督指标进行控制,待系统连续出水稳定后,向下一级水处理设备供水,保证水处理系统产水对机组汽水品质无影响。The urban reclaimed water contains complex components including COD,BOD_(5),dissolved solids,turbidity,ammonia nitrogen,total phosphorus,insoluble salts,etc.It has high bacterial content and is not sta⁃ble.Therefore,it is prone to causing corrosion,scaling,mud and microbiological accumulation of water treat⁃ment system,resulting in contamination of the membrane system.In order to avoid the above problems,it’s crucial to carry out small-scale flocculation test of urban reclaimed water to determine the optimal flocculant concentration.Based on the optimal flocculant concentration,the optimal concentration of coagulant aid is de⁃termined by small-scale test,and the dosage of bactericide must be adjusted according to the total number of bacteria in the water,so that the best filling ratio is determined.After the concentration of agents is deter⁃mined,the operation of the machine-added tank is adjusted.The flocculant and coagulant aid are added into the machine-added tank.The settlement ratio and the turbidity of produced water are controlled according to the supervision index of the optimized adjustment plan.When the water flow from the system is continuous and stable,water is supplied to the next level of water treatment equipment to ensure that water from the wa⁃ter treatment system has no influence on the steam-water quality of the unit.

关 键 词：城市中水 水质 中试试验 沉降比 系统优化 

分 类 号：TM621[电气工程—电力系统及自动化]