IGCC电厂水分级利用与零排放方案研究
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摘要
针对国内首家IGCC电厂运行过程中存在的用排水流程不尽合理、煤气化与含硫废水处理难度大等问题,开展了水分级利用与零排放方案研究。通过系统分析诊断IGCC电厂用排水现状,尤其是废水处理系统的运行状况,提出了具体改造方案,主要内容有:(1)做好废水分类收集、分级使用工作,分别回收低盐和高盐废水;(2)根据不同废水水质特点,分别提出了生活污水、煤气化与含硫废水、化学制水系统反渗透浓水、末端废水处理工程改造方案,尤其是针对IGCC电厂特有的煤气化与含硫废水,提出了全新的处理工艺路线。按上述水分级利用与零排放方案改造,可使IGCC电厂实现废水零排放,单位发电量取水量由原来的1.51 m~3/(MW·h)降低到1.01 m~3/(MW·h)。
In the first IGCC power plant in China, there are some problems in the operation process such as the water drainage process is not reasonable and the coal gasification and sulfur containing wastewater is difficult to deal with. In view of these problems, this study proposes the water gradient utilization and zero emission scheme. Through the systematic analysis and diagnosis of the current situation of IGCC power plant's water utilization and drainage, especially the operation of the wastewater treatment system, a detailed update plan is proposed. The main contents are as follows:(1) Low-salt waste-water and high-salt wastewater should be collected and reused separately;(2) The update schemes of domestic sewage, coal gasification wastewater, chemical desalted water, and terminal waste water treatment are proposed separately. Especially for the special gasification and sulfur containing wastewater of the IGCC power plant, a new treatment process is proposed. Through the upgrade of the above water gradient utilization and zero emission scheme, the zero emission of the whole plant wastewater can be realized, and the water intake for unit power generation is reduced from 1.51 m~3/(MW h) to 1.01 m~3/(MW h).
In the first IGCC power plant in China, there are some problems in the operation process such as the water drainage process is not reasonable and the coal gasification and sulfur containing wastewater is difficult to deal with. In view of these problems, this study proposes the water gradient utilization and zero emission scheme. Through the systematic analysis and diagnosis of the current situation of IGCC power plant's water utilization and drainage, especially the operation of the wastewater treatment system, a detailed update plan is proposed. The main contents are as follows:(1) Low-salt waste-water and high-salt wastewater should be collected and reused separately;(2) The update schemes of domestic sewage, coal gasification wastewater, chemical desalted water, and terminal waste water treatment are proposed separately. Especially for the special gasification and sulfur containing wastewater of the IGCC power plant, a new treatment process is proposed. Through the upgrade of the above water gradient utilization and zero emission scheme, the zero emission of the whole plant wastewater can be realized, and the water intake for unit power generation is reduced from 1.51 m~3/(MW h) to 1.01 m~3/(MW h).
引文
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[15]王奕阳,杜圣羽,薛立波,等.超滤-反渗透处理染整废水并回用工程实例[J].水处理技术,2015(5):132-135.WANG Yiyang,DU Shengyu,XUE Libo,et al.Engineering project of dyeing wastewater treatment and reuse by ultrafiltration-reverse osmosis[J].Technology of Water Treatment,2015(5):132-135.
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[17]王郑,程星星,黄雷,等.催化臭氧化技术在水处理中的应用研究进展[J].应用化工,2017,46(6):1214-1217.WANG Zheng,CHENG Xingxing,HUANG Lei,et al.Research application progress of catalytic ozonation technology in water treatment[J].Applied Chemical Industry,2017,46(6):1214-1217.
[18]郭军.臭氧催化氧化-超滤-反渗透深度处理焦化废水的工程实例[J].工业用水与废水,2015(4):60-62.GUO Jun.Project example of coking wastewater advanced treatment by ozone catalytic oxidation-ultrafiltration-reverse osmosis[J].Industrial Water&Wastewater,2015(4):60-62.
[19]叶正芳,李彦锋,李贤真,等.曝气生物流化床(ABFB)处理煤气化废水的研究[J].中国环境科学,2002,22(1):32-35.YE Zhengfang,LI Yanfeng,LI Xianzhen,et al.Study on coal gasification wastewater treatment with aerated biological fluidized bed(ABFB)[J].China Environmental Science,2002,22(1):32-35.
[20]吴志坚,宋旭,胡大锵,等.高难度化工废水处理工程实例[J].污染防治技术,2012(4):35-40.WU Zhijian,SONG Xu,HU Daqiang,et al.A case study on chemical wastewater treatment project with high difficulty[J].Pollution Control Technology,2012(4):35-40.
[21]刘立,张继军,刘燕,等.机械蒸汽再压缩技术在蒸发领域的应用[J].化学工程,2014,42(11):1-5.LIU Li,ZHANG Jijun,LIU Yan,et al.Application of mechanical vapor recompression technology in evaporation[J].Chemical Engineering,2014,42(11):1-5.
[22]李伟,朱曼利,洪厚胜.机械蒸汽再压缩技术(MVR)研究现状[J].现代化工,2016(11):28-31.LI Wei,ZHU Manli,HONG Housheng.Research status of mechanical vapor recompression technology(MVR)[J].Modern Chemical Industry,2016(11):28-31.
[2]黄雪丽,陈鸿伟,孙永斌.400 MW整体煤气化联合循环机组脱硝方案比较[J].电力建设,2014,35(2):80-85.HUANG Xueli,CHEN Hongwei,SUN Yongbin.Comparison of denitration schemes in 400 MW IGCC plant[J].Electric Power Construction,2014,35(2):80-85.
[3]李波.1 000 MW湿冷机组火电厂水平衡优化分析[J].给水排水,2013,39(10):64-69.LI Bo.Analysis on the optimization of the water consumption balance in the coal power plant with 1 000 MW water-cool power generating unit[J].Water&Wastewater Engineering,2013,39(10):64-69.
[4]朱伟,陶逢春.大型超临界水冷机组废水零排放工程设计研究[J].给水排水,2013,39(5):56-60.ZHU Wei,TAO Fengchun.Design of wastewater zero-discharge of huge super-critical water-cooling units[J].Water&Wastewater Engineering,2013,39(5):56-60.
[5]汪岚,孙灏,张利权,等.火电厂循环水零排放工艺路线及可行性分析[J].水处理技术,2015(6):125-128.WANG Lan,SUN Hao,ZHANG Liquan,et al.The technical route and practicability analysis for zero-emission of circulating water in thermal power plant[J].Technology of Water Treatment,2015(6):125-128.
[6]吴伟,丁峰,赵兴辉.华能沁北电厂废水零排放的探讨[J].电力科技与环保,2017,33(1):37-39.WU Wei,DING Feng,ZHAO Xinghui.Operation and analysis of zero emissions in Huaneng Qinbei Power Plant wastewater[J].Electric Power Technology and Environmental Protection,2017,33(1):37-39.
[7]张建斌.空冷机组水平衡试验及废水“零排放”[J].清洗世界,2016,32(8):44-47.ZHANG Jianbin.Water balance test and waste water zero emissions of air cooling unit[J].Cleaning World,2016,32(8):44-47.
[8]张利,康卫东,张怀军.空冷机组水平衡试验及节水策略[J].山东电力技术,2017,44(5):62-68.ZHANG Li,KANG Weidong,ZHANG Huaijun.Air cooling unit water balance test and water saving strategy[J].Shandong Electric Power,2017,44(5):62-68.
[9]贺旺民,张利民,高明,等.1 000 MW超超临界空冷机组废水零排放工程应用[C]//2017火电厂脱硫废水零排放技术交流研讨会论文集.2017.
[10]胡大龙,于学斌,余耀宏,等.直流冷却型火电厂深度节水方案[J].热力发电,2016,45(9):134-139.HU Dalong,YU Xuebin,YU Yaohong,et al.Depth water conservation technology in coal-fired power plant with once-through cooling system[J].Thermal Power Generation,2016,45(9):134-139.
[11]张志国,胡大龙,王璟,等.燃气电厂深度节水及废水零排放方案[J].中国电力,2017,50(7):127-132.ZHANG Zhiguo,HU Dalong,WANG Jing,et al.The in-depth water conservation and zero discharge technology for gas turbine power plants[J].Electric Power,2017,50(7):127-132.
[12]张江涛,曹红梅,董娟,等.火电厂废水零排放技术路线比较及影响因素分析[J].中国电力,2017,50(6):120-124.ZHANG Jiangtao,CAO Hongmei,DONG Juan,et al.Comparison on the technical routes of zero liquid discharge of fossil-fired power plants and analysis on the influencing factors[J].Electric Power,2017,50(6):120-124.
[13]张磊,郎建峰,牛姗姗.生物膜法在污水处理中的研究进展[J].水科学与工程技术,2010(5):38-41.ZHANG Lei,LANG Jianfeng,NIU Shanshan.Performance biofilm research progress in wastewater treatment[J].Water Sciences and Engineering Technology,2010(5):38-41.
[14]李红,吴志荣.超滤/反渗透工艺深度处理化工废水[J].中国给水排水,2014(8):80-82.LI Hong,WU Zhirong.Advanced treatment of chemical industry wastewater by UF/RO process[J].China Water&Wastewater,2014(8):80-82.
[15]王奕阳,杜圣羽,薛立波,等.超滤-反渗透处理染整废水并回用工程实例[J].水处理技术,2015(5):132-135.WANG Yiyang,DU Shengyu,XUE Libo,et al.Engineering project of dyeing wastewater treatment and reuse by ultrafiltration-reverse osmosis[J].Technology of Water Treatment,2015(5):132-135.
[16]程晓东,禚青倩,余正齐,等.非均相催化臭氧化污水处理技术研究进展[J].工业用水与废水,2017,48(1):6-9.CHENG Xiaodong,ZHUO Qingqian,YU Zhengqi,et al.Research progress of sewage treatment by heterogeneous catalytic ozonation[J].Industrial Water&Wastewater,2017,48(1):6-9.
[17]王郑,程星星,黄雷,等.催化臭氧化技术在水处理中的应用研究进展[J].应用化工,2017,46(6):1214-1217.WANG Zheng,CHENG Xingxing,HUANG Lei,et al.Research application progress of catalytic ozonation technology in water treatment[J].Applied Chemical Industry,2017,46(6):1214-1217.
[18]郭军.臭氧催化氧化-超滤-反渗透深度处理焦化废水的工程实例[J].工业用水与废水,2015(4):60-62.GUO Jun.Project example of coking wastewater advanced treatment by ozone catalytic oxidation-ultrafiltration-reverse osmosis[J].Industrial Water&Wastewater,2015(4):60-62.
[19]叶正芳,李彦锋,李贤真,等.曝气生物流化床(ABFB)处理煤气化废水的研究[J].中国环境科学,2002,22(1):32-35.YE Zhengfang,LI Yanfeng,LI Xianzhen,et al.Study on coal gasification wastewater treatment with aerated biological fluidized bed(ABFB)[J].China Environmental Science,2002,22(1):32-35.
[20]吴志坚,宋旭,胡大锵,等.高难度化工废水处理工程实例[J].污染防治技术,2012(4):35-40.WU Zhijian,SONG Xu,HU Daqiang,et al.A case study on chemical wastewater treatment project with high difficulty[J].Pollution Control Technology,2012(4):35-40.
[21]刘立,张继军,刘燕,等.机械蒸汽再压缩技术在蒸发领域的应用[J].化学工程,2014,42(11):1-5.LIU Li,ZHANG Jijun,LIU Yan,et al.Application of mechanical vapor recompression technology in evaporation[J].Chemical Engineering,2014,42(11):1-5.
[22]李伟,朱曼利,洪厚胜.机械蒸汽再压缩技术(MVR)研究现状[J].现代化工,2016(11):28-31.LI Wei,ZHU Manli,HONG Housheng.Research status of mechanical vapor recompression technology(MVR)[J].Modern Chemical Industry,2016(11):28-31.
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