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1、凝结水过冷度产生的原因分析摘要:本文从各个方面分析了凝结水过冷度产生的原因及其对机组运行经济性、安全性的影响,从凝汽器的设计、改造、检修以及运行维护几个方面,提出了减小凝结水过冷度的对策,从而提高机组运行的经济性和安全性。Abstract:thispaperanalyzedfromvariousaspectsthecausesofthecondensatesupercoolingdegreeanditsimpactonunitoperationefficiency,safety,fromthedesignofthecondenser,mo
2、dification,overhaulandoperationmaintenanceaspects,andputsforwardthemeasurestoreducethecondensatesupercoolingdegree,soastoimprovetheeconomicbenefitofunitoperationandsafety.关键词:凝汽器;过冷度;经济性;安全性Keywords:thecondenser;Supercoolingdegree;Economy;security 1、引言1,theintroduction
3、 凝汽器是凝汽式汽轮机的主要辅助设备,是汽轮机组系统的重要组成部分,它工作性能的好坏直接影响着整个机组的热经济性和安全性。而凝汽器运行状态的优劣集中表现在以下三个方面:是否保持在最佳真空、凝结水的过冷度是否最小以及凝结水的品质是否合格。其中凝结水的过冷度越大,说明被冷却水带走损失的热量越多,而这部分热损失要靠锅炉多燃烧燃料来弥补,从而导致整个热力系统热经济性降低。而且过冷度越大,凝结水中的含氧量也越多,从而加速了相关管道、设备的腐蚀速度。因此需从各个方面对凝汽水过冷度加以重视并采取措施使其减到最小,以此来提高机组运行的经济性和安全性
4、。Condenserisamainauxiliaryequipmentofcondensingsteamturbine,steamturbineunitsystemisanimportantpartofitsworkperformanceisgoodorbaddirectlyaffectsthethermalefficiencyoftheentireunit,andsecurity.Andadvantagesanddisadvantagesofthecondenserrunningstatusinthefollowingthreeaspe
5、cts:whethertomaintainthebestvacuum,minimumofcondensatesupercoolingdegreeandwaterqualityisqualified.Ofcondensatesupercoolingdegree,thegreatertheinstructionswastakenawaybycoolingwaterthemoreheatloss,andthispartoftheheatlosswilldependontheboilerburningmorefueltomakeupfor,res
6、ultinginreducedthewholethermalsystemthermalefficiency.Andthegreaterthedegreeofsupercooling,is,themoreoxygenincondensate,whichacceleratedthecorrosionrateofrelatedpipingandequipment.Thereforeneedfromallaspectsonthesodasupercoolingdegreeofattentionandtakemeasurestominimizeth
7、emakeit,inordertoimprovetheeconomicbenefitofunitoperationandsafety. 2、凝结水过冷度的定义和表示方法2,thedefinitionofcondensatesupercoolingdegreeandthesaidmethod 2.1定义2.1definitions 凝结水过冷度表征了凝汽器热水井中凝结水的过度冷却程度,凝汽器热水井出口凝结水温度与凝汽器在排汽压力下对应的饱和温度之差即称为过冷度。Condensatesupercoolingdegreeofcha
8、racterizationoftheovercoolingofthecondensateinthecondenserhotwell,thecondenserhotwellexportwater
