高速混床双层多孔板式布水装置的研制
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摘要
现有凝结水精处理系统高速混床穹形挡板加多孔板拧水帽式布水装置常出现偏流,使高速混床周期制水量远低于设计要求。分析产生问题的原因为设备本身结构不当引发多孔板变形或损坏所致。为此,研究并提出采用穹形挡板加双层多孔板式布水装置的设计方案,利用流体力学计算机模拟技术优化了双层多孔板的设计参数,并将优化设计方案应用于某680 MW超超临界机组的高速混床布水装置的技改工程中。3个月的运行效果表明,双层多孔板式布水装置运行阻力小,布水均匀,且高速混床出水水质稳定。改造后的高速混床周期制水量由原来的6.6万m~3增加到10.9万m~3,节水减排效果十分显著。
The water distribution device with vaulted baffle-perforated plates and strainers always introduces bias flow in high-flowrate mixed bed(HFMB) polisher.This paper analyzes the issue and figures out the root cause as the deform and damage of the perforated plates.Then the design scheme of water distribution device with vaulted baffle–double perforated plates is proposed,in which the design parameters are optimized through computer simulation technology of fluid mechanics.The new scheme has been applied in technical renovation engineering project of water distribution device in HFMB polisher of a 680 MW ultra-supercritical unit.The result after three months of operation shows that by applying this water distribution device with double perforated plates there were very little differential pressure during operation while the water distribution is uniform with stable water quality in HFMB polisher.The volume of periodic water production has increased from66,000 m3 to 109,000 m3,which is of great significance for water saving and emission reduction.
The water distribution device with vaulted baffle-perforated plates and strainers always introduces bias flow in high-flowrate mixed bed(HFMB) polisher.This paper analyzes the issue and figures out the root cause as the deform and damage of the perforated plates.Then the design scheme of water distribution device with vaulted baffle–double perforated plates is proposed,in which the design parameters are optimized through computer simulation technology of fluid mechanics.The new scheme has been applied in technical renovation engineering project of water distribution device in HFMB polisher of a 680 MW ultra-supercritical unit.The result after three months of operation shows that by applying this water distribution device with double perforated plates there were very little differential pressure during operation while the water distribution is uniform with stable water quality in HFMB polisher.The volume of periodic water production has increased from66,000 m3 to 109,000 m3,which is of great significance for water saving and emission reduction.
引文
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[17]张萍,丁桓如,陈孝和.某电厂凝结水处理混床阻力大原因的研究[J].华北电力技术,2000(4):21-24.ZHANG Ping,DING Huanru,CHEN Xiaohe.Cause of high resistance in mixed bed in condensate water treatment for a certain power plant[J].North China Electric Power,2000(4):21-24.
[18]王福军.计算流体动力学分析[M].北京:清华大学出版社,2004.
[19]王福军.计算流体动力学分析--CFD软件原理与应用[M].北京:清华大学出版社,2004.
[20]赵兴艳,苏莫明,张楚华,等.CFD方法在流体机械设计中的应用[J].流体机械,2000,28(3):22-25.ZHAO Xingyan,SU Moming,ZHANG Chuhua,et al.CFDtechniques for design of fluid machinery[J].Fluid Machinery,2000,28(3):22-25.
[21]张萍,丁桓如,吴春华.水处理设备的水力学均匀性问题探讨[C]//中国电机工程学会电厂化学2013年年会长沙,2013.
[22]李坦,靳世平,黄素逸,等.流场速度分布均匀性评价指标比较与应用研究[J].热力发电,2013,42(11):60-63.LI Tan,JIN Shiping,HUANG Suyi,et al.Evaluation indices of flow velocity distribution uniformity:Comparison and application[J].Thermal Power Generation,2013,42(11):60-63.
[23]周建,阎维平,石丽国,等.SCR反应器入口段流场均匀性的数值模拟研究[J].热力发电,2009,38(4):22-25.ZHOU Jian,YAN Weiping,SHI Liguo,et al.Study on numerical simulation of flow field uniformity in inlet section of SCR reactor[J].Thermal Power Generation,2009,38(4):22-25.
[2]张霆.900 MW机组凝结水精处理系统混床设备运行优化[J].中国电力,2014,47(4):44-47.ZHANG Ting.Operation optimization for condensate polishing mixed bed of 900-MW units[J].Electric Power,2014,47(4):44-47.
[3]韩隶传,汪德良.热力发电厂凝结水处理[M].北京:中国电力出版社,2010.
[4]薛益鸣,徐秀萍,李达然,等.凝结水精处理高速混床2种进水装置布水性能比较[J].水处理技术,2016,42(11):110-112.XUE Yiming,XU Xiuping,LI Daran,et al.Water distribution performance comparative for two devices of condensate polishing high speed mixed bed inlet water[J].Technology of Water Treatment,2016,42(11):110-112.
[5]徐秀萍,仲卫东,刘一操.凝结水精处理DN3600柱形高速混床进水配水装置优化[J].热力发电,2014,43(11):64-68.XU Xiuping,ZHONG Weidong,LIU Yicao.Optimization on inlet water distribution device for DN3600 column type high speed mixed bed[J].Thermal Power Generation,2014,43(11):64-68.
[6]李达然,徐秀萍,刘一操,等.大直径凝结水精处理高速混床水力学性能实验研究[J].水处理技术,2014,40(10):120-122.LI Daran,XU Xiuping,LIU Yicao,et al.The hydraulics performance research of large diameter condensate water on treatment of high speed mixed bed[J].Technology of Water Treatment,2014,40(10):120-122.
[7]徐鹏,史宇涛,陆春建,等.一种穹形布水大型高速混床进水装置:201320307595.9[P].2013-07-24.
[8]王辉新,张磊.用于高速混床的布水装置和高速混床:201420538345.8[P].2014-09-18.
[9]耿卫众,郝相俊.凝结水精处理混床运行周期短的原因分析[J].华电技术,2012,34(10):52-54.GENG Weizhong,HAO Xiangjun.Analysis on reason of short operation cycle of mixed bed for condensed water fine treatment[J].Huadian Technology,2012,34(10):52-54.
[10]唐转江.高速混床制水效率低树脂频繁失效分析与改进[J].贵州电力技术,2015,18(6):15-17.TANG Zhuanjiang.The ananlysis and improvement of the low efficiency of processing of condensed water and the frequent invalidation of resins in high-speed mixed-bed[J].Guizhou Electric Power Technology,2015,18(6):15-17.
[11]周晓湘.凝结水处理混床出水氢电导率偏高的原因综述[J].广东化工,2007,34(2):43-45.ZHOU Xiaoxiang.The summarize on the reasons for the high cation conductivity of the effluent of the condensate polishing mixed beds[J].Guangdong Chemical Industry,2007,34(2):43-45.
[12]杨彦科.凝结水精处理混床泄漏氯离子的原因分析及预防措施[J].水处理技术,2012,38(5):112-114.YANG Yanke.Analyzing and preventive measures of the polishing treatment mixed bed of condensate water leaking chloride ions[J].Technology of Water Treatment,2012,38(5):112-114.
[13]韩隶传,李志刚.凝结水精处理混床机理和应用研究[J].中国电力,2007,40(12):90-93.HAN Lichuan,LI Zhigang.Mechanism and application of condensate polishing mixed bed[J].Electric Power,2007,40(12):90-93.
[14]沈鹏飞,王红武,马鲁铭,等.计算流体力学模拟技术在污水处理构筑物中的应用[J].中国给水排水,2011,27(22):36-41.SHEN Pengfei,WANG Hongwu,MA Luming,et al.Application of computational fluid dynamics simulation in wastewater treatment structures[J].China Water&Wastewater,2011,27(22):36-41.
[15]李小军,和慧勇,叶茂,等.中压凝结水精处理系统高速混床偏流原因分析及防范[J].中国电力,2014,47(8):113-115.LI Xiaojun,HE Huiyong,YE Mao,et al.Analysis and precautions for high-speed mixed bed flow leaning of condensate polishing treatment system[J].Electric Power,2014,47(8):113-115.
[16]涂孝飞,杨彦科.某凝结水精处理高速混床树脂扰动原因分析及处理[J].工业水处理,2017,37(1):102-104.TU Xiaofei,YANG Yanke.Reason analysis and treatment of the high-speed mixed bed resin disturbance of a condensate polishing treatment system[J].Industrial Water Treatment,2017,37(1):102-104.
[17]张萍,丁桓如,陈孝和.某电厂凝结水处理混床阻力大原因的研究[J].华北电力技术,2000(4):21-24.ZHANG Ping,DING Huanru,CHEN Xiaohe.Cause of high resistance in mixed bed in condensate water treatment for a certain power plant[J].North China Electric Power,2000(4):21-24.
[18]王福军.计算流体动力学分析[M].北京:清华大学出版社,2004.
[19]王福军.计算流体动力学分析--CFD软件原理与应用[M].北京:清华大学出版社,2004.
[20]赵兴艳,苏莫明,张楚华,等.CFD方法在流体机械设计中的应用[J].流体机械,2000,28(3):22-25.ZHAO Xingyan,SU Moming,ZHANG Chuhua,et al.CFDtechniques for design of fluid machinery[J].Fluid Machinery,2000,28(3):22-25.
[21]张萍,丁桓如,吴春华.水处理设备的水力学均匀性问题探讨[C]//中国电机工程学会电厂化学2013年年会长沙,2013.
[22]李坦,靳世平,黄素逸,等.流场速度分布均匀性评价指标比较与应用研究[J].热力发电,2013,42(11):60-63.LI Tan,JIN Shiping,HUANG Suyi,et al.Evaluation indices of flow velocity distribution uniformity:Comparison and application[J].Thermal Power Generation,2013,42(11):60-63.
[23]周建,阎维平,石丽国,等.SCR反应器入口段流场均匀性的数值模拟研究[J].热力发电,2009,38(4):22-25.ZHOU Jian,YAN Weiping,SHI Liguo,et al.Study on numerical simulation of flow field uniformity in inlet section of SCR reactor[J].Thermal Power Generation,2009,38(4):22-25.