高效澄清技术在火电厂含煤废水处理系统中的应用  

Application of efficient clarifying technology in coal-containing wastewater treatment system of power plant

作　　者：康少鑫 杨杰 胡明睿 吴有兵 邢文斌 KANG Shaoxin;YANG Jie;HU Mingrui;WU Youbing;XING Wenbin(Xi’an TPRI Water Treatment&Environmental Protection Co.,Ltd.,Xi’an 710032,China;China Huaneng Group Co.,Ltd.,Beijing 100031,China;Zhengning Power Plant,Huaneng Longdong Energy Co.,Ltd.,Qingyang 745306,China)

机构地区：[1]西安西热水务环保有限公司,陕西西安710032 [2]中国华能集团有限公司,北京100031 [3]华能陇东能源有限责任公司正宁电厂,甘肃庆阳745306

出　　处：《工业水处理》2022年第11期194-199,共6页Industrial Water Treatment

基　　金：华能集团总部科技项目(HNKJ21-HF57)。

摘　　要：为提升火电厂含煤废水处理效果,提高系统运行稳定性,提出了一种基于化学混凝工艺的高效澄清技术,并在某火电厂进行了工程应用。通过烧杯试验和工程调试,考察了混凝药剂投加量、活性污泥回流比、排泥周期对系统运行效果的影响。研究结果表明,处理量为40 m^(3)/h,凝聚剂PAC投加质量浓度为22 mg/L,助凝剂PAM投加质量浓度为1.6 mg/L,污泥回流比为4%~6%,排泥频率为累计进水35 m^(3)排泥1次,单次排泥时间为18 min条件下,系统产水浊度可稳定保持在2.5 NTU以下,产水悬浮物小于10 mg/L,满足厂内冲洗水回用要求。运行成本分析表明,该技术单位水处理成本约为1.79元/m^(3),具有较好的经济性。In order to improve the treatment effect of coal-containing wastewater in thermal power plant and the sta⁃bility of system operation,a high-efficiency clarification technology based on chemical coagulation process was pro⁃posed and applied in a thermal power plant.On the basis of beaker test and engineering commissioning,the effects of coagulant dosage,activated sludge reflux ratio and sludge discharge period on the system operation were investi⁃gated.The research results showed that,the turbidity of the produced water of the system could be stably maintained below 2.5 NTU and the suspended matter was less than 10 mg/L under the conditions of 40 m^(3)/h treatment capacity,22 mg/L coagulant PAC dosing mass concentration,2.0 mg/L coagulant aid(PAM)dosing mass concentration,4%-6%sludge return ratio,discharge sludge once every 35 m^(3)of accumulated water inflow and 18 min single sludge dis⁃charge time.It could met the requirements for the reuse of flushing water in the plant.The operation cost analysis showed that the unit water treatment cost was about 1.79 yuan/m^(3),which indicated that the technology had good eco⁃nomic efficiency.

关 键 词：含煤废水 混凝澄清 加药量 排泥周期 

分 类 号：X703[环境科学与工程—环境工程] TM621[电气工程—电力系统及自动化]