强化混凝去除循环水溶解性有机物特性研究

doi:10.11930/j.issn.1004-9649.201704111

中国电力 ›› 2018, Vol. 51 ›› Issue (5): 111-117.DOI: 10.11930/j.issn.1004-9649.201704111

强化混凝去除循环水溶解性有机物特性研究

胡大龙¹, 李美珍², 王园园¹, 许臻¹, 姜琪¹

1. 西安热工研究院有限公司, 陕西西安 710054;
2. 淮北国安电力有限公司, 安徽淮北 235025

收稿日期:2017-04-25 修回日期:2017-05-31 出版日期:2018-05-05 发布日期:2018-05-07
作者简介:胡大龙(1988-),男,湖北安陆人,工程师,主要从事火电厂废水处理回用及废水零排放技术研究,E-mail:hudalong@tpri.com.cn;李美珍(1976-),女,江西临川人,工程师,主要从事火电厂化学专业和脱硫专业技术工作,E-mail:315531575@qq.com;王园园(1988-),女,陕西富平人,助理工程师,主要从事火电厂水处理技术及防腐、防垢研究,E-mail:wangyuanyuan@tpri.com.cn
基金资助:
中国华能集团公司科技资助项目（No.HNKJ17-H15）。

Study on the Removal Characteristics of Dissolved Organic Matter in the Circulating Water by Enhanced Coagulation

HU Dalong¹, LI Meizhen², WANG Yuanyuan¹, XU Zhen¹, JIANG Qi¹

1. Xi'an Thermal Power Research Institute Co., Ltd., Xi'an 710054, China;
2. HuaiBei Guoan Power Co., Ltd., Huaibei 235025, China

Received:2017-04-25 Revised:2017-05-31 Online:2018-05-05 Published:2018-05-07
Supported by:
This work is supported by China Huaneng Grop Co., Ltd. Science & Technology Program (No.HNKJ17-H15).

摘要/Abstract

摘要： 循环水中有机物浓度高易引起微生物滋长和膜污堵，提高循环水利用率必须对其加以处理。采用传统化学分析，结合紫外-可见光谱、凝胶色谱和三维荧光等手段，研究了强化混凝对循环水中有机物的去除特性。结果表明：（1）在0~120mg/L内，随FeCl₃投加量增加，混凝对有机物去除率增加；溶解性有机物分子缩合度降低，分子量减小。（2）在FeCl₃质量浓度为120mg/L条件下，混凝对总有机碳（TOC）和溶解性化学需氧量（SCOD）去除率分别为54.06%和33.33%；腐殖质类物质C1、C2和蛋白质类物质C3的荧光强度F_max值分别下降了48.02%、66.38%和22.27%。说明强化混凝可有效降低循环水中有机物浓度，特别是去除难被生物降解的腐殖质类物质效果明显，因而可通过旁流强化混凝处理循环水，提高循环水系统运行稳定性，为循环水进一步进行膜处理奠定良好基础。

关键词: 循环水, 强化混凝, 溶解性有机物(DOM), 分子量, 三维荧光, 腐殖质, 蛋白质

Abstract: The high concentration of organic matter in circulating water may easily cause microbial growth and membrane fouling. Removing organic matter could improve the utilization of circulating water. The removal characteristics of dissolved organic matter in the circulating water by enhanced coagulation were investigated through conventional chemical analysis in combination with UV-visible spectra, gel filtration chromatography (GPC) and three -dimensional fluorescence. The results indicated that with the increase of FeCl₃ dosage within the range of 0-120 mg/L, the DOM removal rate went up with molecules condensation degree reduced and the molecular weight decreased. Under the condition of FeCl₃ dosage of 120 mg/L, the removal rate of TOC and SCOD were 54.06% and 59.71%, respectively; fluorescence intensity Fmax of humic substances C1, C2 and protein materials C3 were down 48.02%, 66.38% and 22.27%, respectively. Enhanced coagulation could effectively reduce the DOM in circulating water. Especially for those humic substances, which was difficult to be biodegradable, the removal effect was significant. Therefore, enhanced coagulation treatment of circulating water could be used to improve the operation stability of circulating water system and lay a good foundation for the further membrane treatment of circulating water.

Key words: circulating water, enhanced coagulation, DOM, molecular weight, three-dimensional fluorescence, humic substances, protein

中图分类号:

X703
TM621.8

胡大龙, 李美珍, 王园园, 许臻, 姜琪. 强化混凝去除循环水溶解性有机物特性研究[J]. 中国电力, 2018, 51(5): 111-117.

HU Dalong, LI Meizhen, WANG Yuanyuan, XU Zhen, JIANG Qi. Study on the Removal Characteristics of Dissolved Organic Matter in the Circulating Water by Enhanced Coagulation[J]. Electric Power, 2018, 51(5): 111-117.

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强化混凝去除循环水溶解性有机物特性研究

Study on the Removal Characteristics of Dissolved Organic Matter in the Circulating Water by Enhanced Coagulation

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Study on the Removal Characteristics of Dissolved Organic Matter in the Circulating Water by Enhanced Coagulation

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