减温减压器介绍

减温减压器GettheValveDoctor®solution2024/2/17©2006.CCI–ControlComponentsInc.CCIistheValveDoctor®.Allrightsreserved.P8422内容基本概念减温的定义减温原理影响减温效果的因素产品分类及应用应用中出现的问题BTG减温减压器2024/2/17©2006.CCI–ControlComponentsInc.CCIistheValveDoctor®.Allrightsreserved.P8423什么是减温?又称–过热蒸汽调节，温度控制定义:往过热蒸汽里注入一定量的水，使得过热蒸汽温度降低到某一设定值。2024/2/17©2006.CCI–ControlComponentsInc.CCIistheValveDoctor®.Allrightsreserved.P8424

减温基本原理减温水经过喷嘴后喷出分散成不同尺寸的水滴（初级雾化）水滴在蒸汽中，因蒸汽流动产生的空气动力大于水分子的表面张力，水滴被击碎，形成水雾（二级雾化）水雾悬浮分散在过热蒸汽中，吸收热量，达到沸点,经过一段时间，水雾蒸发，从而蒸汽温度降低

（三级雾化）2024/2/17©2006.CCI–ControlComponentsInc.CCIistheValveDoctor®.Allrightsreserved.P8425水滴雾化过程由喷嘴喷出水滴水滴悬浮在蒸汽中被加热到沸点水滴吸收热量完全雾化

水加热沸点汽化2024/2/17©2006.CCI–ControlComponentsInc.CCIistheValveDoctor®.Allrightsreserved.P8426影响减温效果的因素水滴的大小与温度蒸汽的流速减温水与减温后蒸汽的压差水雾与过热蒸汽的接触面积蒸汽管道的尺寸减温前后的直管段的长度2024/2/17©2006.CCI–ControlComponentsInc.CCIistheValveDoctor®.Allrightsreserved.P84271mm–20mm尘雾20mm–250mm薄雾250mm–500mm毛毛雨>500mm雨水滴尺寸试验证明要蒸发20µ的水滴大约需要0.01秒，而要蒸发相同温度下200µ的水滴则需要1秒。水滴尺寸与蒸发时间大约成平方关系。2024/2/17©2006.CCI–ControlComponentsInc.CCIistheValveDoctor®.Allrightsreserved.P8428韦伯数(We)d=水滴直径 ρ=蒸汽密度v=水滴与蒸汽的相对速度ρv2=蒸汽的速度头τ=表面张力2024/2/17©2006.CCI–ControlComponentsInc.CCIistheValveDoctor®.Allrightsreserved.P8429

不同的水滴形状在不同的相对速度下被击碎的水滴

形状(喷嘴直径0.5mm)

2024/2/17©2006.CCI–ControlComponentsInc.CCIistheValveDoctor®.Allrightsreserved.P84210Secondaryatomization韦伯数大于12,蒸汽的动力才能克服水分子的表面张力将水滴击碎布袋状蘑菇云状2024/2/17©2006.CCI–ControlComponentsInc.CCIistheValveDoctor®.Allrightsreserved.P84211不同结构减温器韦伯数假设水与蒸汽的压差为10bar水的速度为45m/s如果蒸汽的速度为45米每秒,则相对速度=02024/2/17©2006.CCI–ControlComponentsInc.CCIistheValveDoctor®.Allrightsreserved.P84212环形多喷嘴减温器韦伯数水滴的速度在蒸汽运动方向上为

0如果蒸汽速度=45m/s(150ft/s)

则相对速度=45m/s(150ft/s)用弹簧背压喷嘴,‘d’值基本保持在最小值表面张力只受温度影响同样的压力下,相对速度值要比插入式的高2024/2/17©2006.CCI–ControlComponentsInc.CCIistheValveDoctor®.Allrightsreserved.P84213蒸汽速度在20～80m/s之间时，最有利于水滴的蒸发。最大不要超过100m/s（管道允许速度）。蒸汽速度要足够高，以保证水滴能够悬浮在其中，不会落到蒸汽管道内壁，损坏管道。最小不小于8m/s。减压后的蒸汽速度2024/2/17©2006.CCI–ControlComponentsInc.CCIistheValveDoctor®.Allrightsreserved.P84214流动范围（蒸汽管道直径）2024/2/17©2006.CCI–ControlComponentsInc.CCIistheValveDoctor®.Allrightsreserved.P84215差的减温效果图像(水雾与过热蒸汽的接触面积)热成像效果图蒸汽管道红颜色区域—温度高绿颜色区域---水和蒸汽混合很差的温度控制效果2024/2/17©2006.CCI–ControlComponentsInc.CCIistheValveDoctor®.Allrightsreserved.P84216热成像蒸汽管道内温度均匀雾化均匀温度控制很好好的减温效果图像(水雾与过热蒸汽的接触面积)2024/2/17©2006.CCI–ControlComponentsInc.CCIistheValveDoctor®.Allrightsreserved.P84217水雾在下游管道不同距离处的状态

4”downstream6”downstream

15”downstream2024/2/17©2006.CCI–ControlComponentsInc.CCIistheValveDoctor®.Allrightsreserved.P84218总结水滴有没有被击碎(We>12?)水滴尺寸是否太大水滴会不会碰到管壁是否有足够的距离去测量温度CCI减温器产品介绍

Desuperheater2024/2/17©2006.CCI–ControlComponentsInc.CCIistheValveDoctor®.Allrightsreserved.P84220文丘里管减温器2024/2/17©2006.CCI–ControlComponentsInc.CCIistheValveDoctor®.Allrightsreserved.P84221TypesofDesuperheaters:SprayringdesuperheatersNormallyappliedinlargemassflowsystemsAtomizationFixedorifice:PrimaryatomizationonlygoodathighflowratesPerpendicularspray:goodSecondaryatomizationbutmaynotebadprimaryatomizationatlowflowsFlowCoverage:GoodLinersareoftenusedwhensteamisdesuperheatedclosetosaturationRangeabiltiyislimitedtobetween3:1&5:12024/2/17©2006.CCI–ControlComponentsInc.CCIistheValveDoctor®.Allrightsreserved.P84222DesuperheaterMDA-VDesuperheaterforsmallpipingsystemsFixedorifice:Primaryatomizationisnotgreat,butwaterflowratesareoftenlowTypicallyusedinconjunctionwithhighsteamvelocitiessoSecondaryatomizationisalwaysgoodFlowcoverage:good,smallpipeiseasytocoverRangeabilityonlylimitedbywatervalve2024/2/17©2006.CCI–ControlComponentsInc.CCIistheValveDoctor®.Allrightsreserved.P84223可变截流孔减温器Appliedinlarge&smallmassflowsystemsHighvelocityflowgeneratedaroundplugWaterispulledthroughchannelsbylocalpressurechangeAtomization:SecondaryatomizationdominatestheprocessandisgoodatallflowratesFlowcoverage:goodTHERMALSTRESSES:largeamountofmetalinsteamflow2024/2/17©2006.CCI–ControlComponentsInc.CCIistheValveDoctor®.Allrightsreserved.P84224Construction

AB5600MixingChamberFlowplugHousing2024/2/17©2006.CCI–ControlComponentsInc.CCIistheValveDoctor®.Allrightsreserved.P84225PrincipleofAB5600Ifnosteam,theplugisseatedontheseatring.WhensteamcometoDSH,itpushuptheflowplugforspacetoflow.Whensteampassseatring,itsuckcoolingwaterfromdistributionplate.GoodpointofAB5600isthatitcankeepsteamvelocityatcoolingwatersuckingpointfastenoughtogenerategoodatomizing.Abigturbulenceiscreatedinsideofmixingchamberandithelpstoevaporatecoolingwaterquickly.2024/2/17©2006.CCI–ControlComponentsInc.CCIistheValveDoctor®.Allrightsreserved.P84226PrincipleAB5600NoLoadPhase2024/2/17©2006.CCI–ControlComponentsInc.CCIistheValveDoctor®.Allrightsreserved.P84227PrincipleAB5600HeavyLoadPhaseLoadPhase2024/2/17©2006.CCI–ControlComponentsInc.CCIistheValveDoctor®.Allrightsreserved.P84228DifferenceAB5600andAB5800

MixingChamberAB5600:

AB5600includessteammixingchamberwithsteamreturndevicewhichenhancequickevaporationofcoolingwater.AB5600:

Thermalsleevecanbeinstalledatflowplugtoreducecrackcausedbythermalshock.2024/2/17©2006.CCI–ControlComponentsInc.CCIistheValveDoctor®.Allrightsreserved.P84229DifferenceAB5600andAB5800

DistributionPlateAB5600:Coolingwaterisdistributedevenlycircumferenceofflowplugbydistributionplate.Wedesignnumberandsizeofinjectionholeonthedistributionplateonebyoneforevendistributionofcoolingwater.WaterHoleFixedBolt2024/2/17©2006.CCI–ControlComponentsInc.CCIistheValveDoctor®.Allrightsreserved.P84230固定多喷嘴减温器Appliedinmediumtosmallmassflowsystems,butmultiplevalvescanbeusedforlargesystemsPrimaryatomization:variesdependingonflowthroweachnozzleSecondaryatomization:bad,waterissprayedwiththesteamflowNozzlescantakehigherpressurethansprayringRangeabiltiyclaims>50:1.but…2024/2/17©2006.CCI–ControlComponentsInc.CCIistheValveDoctor®.Allrightsreserved.P84231辅助蒸汽减温器Steamjetshearswateratinjectionpoint–ExcellentAtomizationoutofthenozzleHighdesuperheatingrangeability,50:1–SpraywatervalveeslimitingfactorRequiresexternalwaterspray&steamvalves2024/2/17©2006.CCI–ControlComponentsInc.CCIistheValveDoctor®.Allrightsreserved.P84232辅助蒸汽减温器Steamjetatomizeswaterintofinedropletsforquickerevaporation-ExcellentAtomizationoutofthenozzleHighdesuperheatingrangeability,50:1–SpraywatervalveeslimitingfactorRequiresexternalwaterspray&steamvalves2024/2/17©2006.CCI–ControlComponentsInc.CCIistheValveDoctor®.Allrightsreserved.P84233一体式螺旋固定喷嘴减温器2024/2/17©2006.CCI–ControlComponentsInc.CCIistheValveDoctor®.Allrightsreserved.P84234一体化插入式减温器2024/2/17©2006.CCI–ControlComponentsInc.CCIistheValveDoctor®.Allrightsreserved.P84235一体化插入式减温器弹簧背压喷嘴2024/2/17©2006.CCI–ControlComponentsInc.CCIistheValveDoctor®.Allrightsreserved.P84236弹簧背压喷嘴特点固定喷嘴弹簧被压喷嘴固定螺旋喷嘴2024/2/17©2006.CCI–ControlComponentsInc.CCIistheValveDoctor®.Allrightsreserved.P84237弹簧背压式喷嘴特点分析可调比高,达到200:1弹簧材料:INCONEL填料:石墨压力可调:可调范围:1.5-8kg/cm2不会出现水滴.雾化范围宽:成扇形面散开水滴大小均匀,水滴尺寸:20-250um,薄雾状防止气蚀,有背压五级密封防堵,自清洁设计不需要单向截止阀维护简单2024/2/17©2006.CCI–ControlComponentsInc.CCIistheValveDoctor®.Allrightsreserved.P84238分体式减温器DA-OVariableorificenozzleforbestPrimaryatomizationthroughallflowratesSprayswiththeflowsolittleaddedbySecondaryatomizationEasyinstallationintosteamlinesSpraynozzlescreatebackpressuretospraywatervalveOver-travelnozzlesforpassingcontaminationHighRangeabilitybetween30:1and50:1–SpraywaterValveeslimitingfactor2024/2/17©2006.CCI–ControlComponentsInc.CCIistheValveDoctor®.Allrightsreserved.P84239ManifoldSLSNassemblyDA-MVariableorificenozzleforbestPrimaryatomizationthroughallflowratesSpraysperpendiculartotheflowsogoodSecondaryatomizationEasyinstallationintosteamlinesOver-travelnozzlesforpassingcontaminationFlowcoverage:PenetrationshouldbecloselyconsideredHighRangeabilitybetween30:1and50:1–SpraywaterValveeslimitingfactor2024/2/17©2006.CCI–ControlComponentsInc.CCIistheValveDoctor®.Allrightsreserved.P84240

CCI减温减压器

ConditioningValve2024/2/17©2006.CCI–ControlComponentsInc.CCIistheValveDoctor®.Allrightsreserved.P84241BTG/CCI2024/2/17©2006.CCI–ControlComponentsInc.CCIistheValveDoctor®.Allrightsreserved.P84242精确的温度控制精确的压力控制低噪音低振动高可靠性低维修成本可调范围广严密关断控制简单良好的蒸汽调节系统?ConditioningValve雾化效果热应力噪音/振动2024/2/17©2006.CCI–ControlComponentsInc.CCIistheValveDoctor®.Allrightsreserved.P842462024/2/17©2006.CCI–ControlComponentsInc.CCIistheValveDoctor®.Allrightsreserved.P84247VLB2024/2/17©2006.CCI–ControlComponentsInc.CCIistheValveDoctor®.Allrightsreserved.P84249减温减压器型号:VLB延长导向阀杆,带隔离帽压力自密封式上阀盖阀芯阀杆连接无销钉一体锻造流线型阀体弹性阀座(两片)浮动减压套筒只有两个区域需要填料密尽可能薄的壁厚2024/2/17©2006.CCI–ControlComponentsInc.CCIistheValveDoctor®.Allrightsreserved.P84250压力密封上阀盖内嵌式上阀盖,间隙配合,同轴度,稳定性高,避免阀杆弯曲压力自密设计,不受温度的影响超长延伸灌沙空心钢支架并配合热隔离帽防止热辐射,减少振动阀内件更容易拆卸不需要大力矩扳手2024/2/17©2006.CCI–ControlComponentsInc.CCIistheValveDoctor®.Allrightsreserved.P84251独特阀内件设计流线型阀体两片式阀座设计,不会受温度急速变化而变形,随着温度变化而进行补偿,保护了阀座,并保证长期密封延伸型导向热应力在一个平面阀芯阀杆无销钉无螺纹连接2024/2/17©2006.CCI–ControlComponentsInc.CCIistheValveDoctor®.Allrightsreserved.P84252初级雾化---弹簧背压式喷嘴2024/2/17©2006.CCI–ControlComponentsInc.CCIistheValveDoctor®.Allrightsreserved.P84253热基膜保护热隔离保护2024/2/17©2006.CCI–ControlComponentsInc.CCIistheValveDoctor®.Allrightsreserved.P84254VLB早期产品螺栓螺母式阀盖阀杆阀芯通过螺纹连接阀座靠套筒压紧在阀体上，直接受到高速蒸汽的冲刷调节套筒通过垫圈上下固定，高温下没有收缩的余地多处填料密封，增加泄漏点SeatControlsleeve选型依据一：直管段长度及安装选型依据：流速及其它1.正常蒸汽速度控制在20～80m/s之间，保证水滴能够悬浮在其中有利于水滴的蒸发,最小不要低于8米/秒,最大不要超过100米/秒.噪音要求低于85分贝执行机构带手轮.泄漏等级:ANSIV级尽量不变径给水阀非常重要,要求金属密封5级.VST系列减温减压器2024/2/17©2006.CCI–ControlComponentsInc.CCIistheValveDoctor®.Allrightsreserved.P84258VSTfamily–40yearsofsteamconditioningserviceSteamconVST-100/VST-110VSTVST-SE2024/2/17©2006.CCI–ControlComponentsInc.CCIistheValveDoctor®.Allrightsreserved.P84259压力密封上阀盖一体锻造阀体两片式阀座超长阀座导向可以在低流速雾化

可调比大于50:1保护阀座的设计辅助蒸汽强制雾化热隔离措施型号:VST-SE2024/2/17©2006.CCI–ControlComponentsInc.CCIistheValveDoctor®.Allrightsreserved.P84260VST-SE2024/2/17©2006.CCI–ControlComponentsInc.CCIistheValveDoctor®.Allrightsreserved.P84261VST-SE15%开度小开度时避免阀座受到冲刷2024/2/17©2006.CCI–ControlComponentsInc.CCIistheValveDoctor®.Allrightsreserved.P84262VST-SE

50%open2024/2/17©2006.CCI–ControlComponentsInc.CCIistheValveDoctor®.Allrightsreserved.P84263VST-SE

100%open2024/2/17©2006.CCI–ControlComponentsInc.CCIistheValveDoctor®.Allrightsreserved.P84264StemandPlug–VST-SE2024/2/17©2006.CCI–ControlComponentsInc.CCIistheValveDoctor®.Allrightsreserved.P84265恒温喷水阀非常关键至少V级密封2.金属密封3.承受高压差避免在开车工况或小流量时介质不稳定时对阀座的损坏带手轮2024/2/17©2006.CCI–ControlComponentsInc.CCIistheValveDoctor®.Allrightsreserved.P84266恒温喷水阀要求根据控制电路的要求，在任何负荷下，提供准确的喷水量。2.可以在高压降下操作（达3500psi或240bar），不会破坏阀内件。3.可靠、一致的运行。关闭严密，可以防止对阀门或下游设备（例如汽机、高旁管道）的破坏。

2024/2/17©2006.CCI–ControlComponentsInc.CCIistheValveDoctor®.Allrightsreserved.P84267恒温喷水阀出现故障后带来的后果热效率损失。喷水阀泄漏将会使节流蒸汽温度下降。低温会明显影响热效率。此时需要增加锅炉的热输入，以便使节流蒸汽温度保持在设定值。

2.温度控制问题。蒸汽温度控制不准确将会影响到高旁蒸汽管道和汽机。压力超过1800psi(124bar)时，34-40F（19－22C）的温度变化将会造成约1％的热效率变化。3.维护费用高。阀内件腐蚀损坏后，需要经常更换阀内件或进行维修。2024/2/17©2006.CCI–ControlComponentsInc.CCIistheValveDoctor®.Allrightsreserved.P84268ISA/IEC手册该手册规定了调节阀设计，尺寸及选型必须达到的最低要求并提供了控制阀的基本规范及标准该手册阐述了流速对阀门的破坏,及对流速的控制要求2024/2/17©2006.CCI–ControlComponentsInc.CCIistheValveDoctor®.Allrightsreserved.P84269ISA手册:阀芯处的速度控制要求

严酷工况气体/蒸汽的速度头液体的流速kPam/s连续的单项流体48030气蚀或多项流体27523振动非常敏感的地方7512间歇工况1030-KE=

V22gc2024/2/17©2006.CCI–ControlComponentsInc.CCIistheValveDoctor®.Allrightsreserved.P84270对于管道的速度(能量)要求可接受的能量限制气体/蒸汽可接受的速度限制液体/水kPa米/秒主管线53阀芯480302024/2/17©2006.CCI–ControlComponentsInc.CCIistheValveDoctor®.Allrightsreserved.P84271严酷工况伴随的特征高温/高压气蚀闪蒸噪音间隙流热应力维护成本高定期维护2024/2/17©2006.CCI–ControlComponentsInc.CCIistheValveDoctor®.Allrightsreserved.P84272速度控制阀原理-能量守恒P2P1VVP1P2缩流处流向2024/2/17©2006.CCI–ControlComponentsInc.CCIistheValveDoctor®.Allrightsreserved.P84273速度控制原理单级压降DP=P1-P22024/2/17©2006.CCI–ControlComponentsInc.CCIistheValveDoctor®.Allrightsreserved.P84274速度控制原理多级压降2024/2/17©2006.CCI–ControlComponentsInc.CCIistheValveDoctor®.Allrightsreserved.P84275CCI在1961年首先发明了第一台迷宫阀并注册商标DRAG

DRAG速度控制原理单级减压

Singlestagepressurereduction多级减压

Multistagepressurereduction多通道多级盘片

MultipathmultistagediskDRAG盘片组合

DRAG®diskstack2024/2/17©2006.CCI–ControlComponentsInc.CCIistheValveDoctor®.Allrightsreserved.P8427