汽轮机旁路Application应用.doc

《汽轮机旁路Application应用.doc》由会员上传分享，免费在线阅读，更多相关内容在教育资源-天天文库。

1、HORATurbineBypassSystem汽轮机旁路095e555f2b782523b1f0a33f954b0d03.docSeite15von15HORATurbineBypassSystemApplication应用Aturbinebypasssystempermitsoperationoftheboilerindependentlyfromthesteamturbineduringstart-up,commissioning,turbinetrip(shutdown)andloadalternations.Itgivesahigherpl

2、antavailabilityandoperationalflexibilityoveralldifferentoperatingconditions.Thestart-uptimeundercold,warmandhotconditionssuperhotisreduced.Keepingthethermaltransientintheboilertoaminimumcontinuousflowthroughsuperheaterandreheater(maintainedtubecooling)mustbeprovidedandthepress

3、ureduringtheentirestart-uphastobecontrolled.Aturbinebypasssystemisinoperationuntildesiredsteamconditionsfrommetaltemperaturesofrotorandcasingoftheturbinearematched.Thismethodreducesthesolidparticleerosiontotheturbinealso,sincethelossofmaterialfromtheboilerinternalsmostlikelyoc

4、cursduringstart-up.Afteraloadrejectionoftheturbinethebypassvalvesoperatetheboileratanoptimalstandbyloadandavoidaboilertrip.Theyequalthedifferencebetweenthesteamgeneratorandtheturbineflow.Itisabigadvantagethatcommissioningoftheboilercanbecarriedouttotallyindependentoftheturbine

5、.Boilertrialsthatareusualwhencommissioningthefiringsystemareperformedwithoutstressingtheturbineunnecessarily.汽轮机在启动，试运行，运行和调峰运行阶段，旁路系统能够使锅炉独立于汽轮机单独运行。在不同的工艺条件下，它显示了更高的实用性和运转时的灵活及适应性。在冷态，温态,热态和极热的状态下，缩短了系统启动的时间。维持最小的流量的持续通过过热器和再热器，防止再热器的干烧及冷却其管路,使他们不过热，在整个启动过程中,通过控制压力和温度顺利启动系统。

6、汽轮机旁路系统的另外一个目的是匹配汽轮机缸体及转子等金属材料与相应的蒸气温度相互适应和匹配.同时减少在启动阶段锅炉中的金属颗粒对汽轮机的侵蚀与破坏作用.在甩负荷的情况下,实现停机不停炉的目的.以下待查当汽轮机出现抑制负载时，旁路的阀门控制锅炉处在一个最理想的备用负载，同样也避免了锅炉跳闸。它们平衡了蒸汽发电机和汽轮机流动之间的差异。这是一个大的优点对于汽轮机中的锅炉试运行时能够完全的独立运转。锅炉的试用在运行不对汽轮机产生不必要的应力的点火系统的试运转中是很平常的。095e555f2b782523b1f0a33f954b0d03.docSeite1

7、5von15HORATurbineBypassSystemTheHP-bypassvalveissizedfor100%steamcapacityoftheboilertoreducethepressure旁路阀门适用于锅炉里100％蒸汽流量。integratedwithdesuperheating(PRDS)tocoldreheatconditions.Ithastoprotectthelive它保护了正常状况下的蒸汽管道系统。steampipingsystem.Ifthereisnoreheaterthesteamhastobeconditio

8、neddownto如果没有再热器，蒸汽可以通过旁路阀降低到冷凝器可以接受的状态。acceptablecondenserle