燃煤电厂脱硫废水预处理装置设计与中试研究  

Pretreatment Device Design and Pilot Application of Desulfurization Wastewater in Coal-Fired Power Plants

作　　者：连坤宙[1] 胡特立 王永前[2] 焦绪常 王璟[1] 曹红梅[3] 毛进[1] 樊开远 LIAN Kunzhou;HU Teli;WANG Yongqian;JIAO Xuchang;WANG Jing;CAO Hongmei;MAO Jin;FAN Kaiyuan(Xi’an Thermal Power Research Institute Co.,Ltd.,Xi’an 710054,China;Jining Yunhe Power Generation Ltd.,Huaneng Group,Jining272057,China;Huaneng Shandong Power Generation Co.,Ltd.,Jinan 250014,China)

机构地区：[1]西安热工研究院有限公司,陕西西安710054 [2]华能济宁运河发电有限公司,山东济宁272057 [3]华能山东发电有限公司,山东济南250014

出　　处：《中国电力》2018年第6期166-171,共6页Electric Power

基　　金：华能山东发电有限公司科技项目(TL-CA-128-2016A)~~

摘　　要：针对火电厂脱硫废水的水质特点,提出"一体式软化澄清-超滤"预处理工艺并在山东某火力发电厂进行了中试研究,研究内容包括一体式软化澄清装置对Ca^(2+)、Mg^(2+)、浊度去除效果,超滤系统运行压力、产水流量、产水浊度及预处理工艺化学药剂费用等。结果表明:利用一体式软化澄清装置处理脱硫废水,出水Ca^(2+)、Mg^(2+)质量浓度可分别由400~660 mg/L和5 310~15 689 mg/L降至25 mg/L和10 mg/L,浊度小于或等于2.0 NTU;超滤系统运行稳定,产水浊度小于或等于0.1 NTU,SDI值小于3.0,可稳定达到后续反渗透系统进水水质要求。该一体式软化澄清-超滤预处理工艺中试研究成果可为火电厂废水零排放技术研究提供重要的基础数据。According to the characteristics of desulfurization wastewater in the coal-fired power plant, the desulfurization wastewater pretreatment method of the integrated softening and clarifying-ultrafiltration is proposed in this paper. The pilot project testing is completed in a coal-fired power plant in Shandong province. The study includes the removal efficiency of integrated softening and clarifying on Ca2＋, Mg2＋ and the turbidity, the operating pressure of the ultrafiltration system, the flow and turbidity of the product water, and the chemical cost of the pretreatment process. The results show that the content of Ca2＋ decreases from 400-660 mg/L to 25 mg/L and the content of Mg2＋ decreases from 5 310~15 689 mg/L to 10 mg/L after the treatment of desulphurization wastewaterby integrated softening and clarifying-ultrafiltration, respectively, with the turbidity being no more than 2.0 NTU. The ultrafiltration system operates stably and the turbidity of product water is no more than 0.1 NTU, SDI value is less than 3.0, which can meet the required water quality conditions of the reverse osmosis system. The study results of the integrated softening and clarifying-ultrafiltration can provided important data for the research on the zero wastewater discharge technology in the power plant.

关 键 词：火电厂 脱硫废水 处理 一体式软化澄清 超滤 废水零排放 

分 类 号：TM621.8[电气工程—电力系统及自动化] X77[环境科学与工程—环境工程]