減溫減壓器介紹

減溫減壓器GettheValveDoctor?solution2024/2/17?2006.CCI–ControlComponentsInc.CCIistheValveDoctor?.Allrightsreserved.P8422內(nèi)容基本概念減溫的定義減溫原理影響減溫效果的因素產(chǎn)品分類及應(yīng)用應(yīng)用中出現(xiàn)的問題BTG減溫減壓器2024/2/17?2006.CCI–ControlComponentsInc.CCIistheValveDoctor?.Allrightsreserved.P8423什么是減溫?又稱–過熱蒸汽調(diào)節(jié)，溫度控制定義:往過熱蒸汽里注入一定量的水，使得過熱蒸汽溫度降低到某一設(shè)定值。2024/2/17?2006.CCI–ControlComponentsInc.CCIistheValveDoctor?.Allrightsreserved.P8424

減溫基本原理減溫水經(jīng)過噴嘴后噴出分散成不同尺寸的水滴（初級(jí)霧化）水滴在蒸汽中，因蒸汽流動(dòng)產(chǎn)生的空氣動(dòng)力大于水分子的表面張力，水滴被擊碎，形成水霧（二級(jí)霧化）水霧懸浮分散在過熱蒸汽中，吸收熱量，達(dá)到沸點(diǎn),經(jīng)過一段時(shí)間，水霧蒸發(fā)，從而蒸汽溫度降低

（三級(jí)霧化）2024/2/17?2006.CCI–ControlComponentsInc.CCIistheValveDoctor?.Allrightsreserved.P8425水滴霧化過程由噴嘴噴出水滴水滴懸浮在蒸汽中被加熱到沸點(diǎn)水滴吸收熱量完全霧化

水加熱沸點(diǎn)汽化2024/2/17?2006.CCI–ControlComponentsInc.CCIistheValveDoctor?.Allrightsreserved.P8426影響減溫效果的因素水滴的大小與溫度蒸汽的流速減溫水與減溫后蒸汽的壓差水霧與過熱蒸汽的接觸面積蒸汽管道的尺寸減溫前后的直管段的長(zhǎng)度2024/2/17?2006.CCI–ControlComponentsInc.CCIistheValveDoctor?.Allrightsreserved.P84271mm–20mm塵霧20mm–250mm薄霧250mm–500mm毛毛雨>500mm雨水滴尺寸試驗(yàn)證明要蒸發(fā)20μ的水滴大約需要0.01秒，而要蒸發(fā)相同溫度下200μ的水滴則需要1秒。水滴尺寸與蒸發(fā)時(shí)間大約成平方關(guān)系。2024/2/17?2006.CCI–ControlComponentsInc.CCIistheValveDoctor?.Allrightsreserved.P8428韋伯?dāng)?shù)(We)d=水滴直徑 ρ=蒸汽密度v=水滴與蒸汽的相對(duì)速度ρv2=蒸汽的速度頭τ=表面張力2024/2/17?2006.CCI–ControlComponentsInc.CCIistheValveDoctor?.Allrightsreserved.P8429

不同的水滴形狀在不同的相對(duì)速度下被擊碎的水滴

形狀(噴嘴直徑0.5mm)

2024/2/17?2006.CCI–ControlComponentsInc.CCIistheValveDoctor?.Allrightsreserved.P84210Secondaryatomization韋伯?dāng)?shù)大于12,蒸汽的動(dòng)力才能克服水分子的表面張力將水滴擊碎布袋狀蘑菇云狀2024/2/17?2006.CCI–ControlComponentsInc.CCIistheValveDoctor?.Allrightsreserved.P84211不同結(jié)構(gòu)減溫器韋伯?dāng)?shù)假設(shè)水與蒸汽的壓差為10bar水的速度為45m/s如果蒸汽的速度為45米每秒,則相對(duì)速度=02024/2/17?2006.CCI–ControlComponentsInc.CCIistheValveDoctor?.Allrightsreserved.P84212環(huán)形多噴嘴減溫器韋伯?dāng)?shù)水滴的速度在蒸汽運(yùn)動(dòng)方向上為

0如果蒸汽速度=45m/s(150ft/s)

則相對(duì)速度=45m/s(150ft/s)用彈簧背壓噴嘴,‘d’值基本保持在最小值表面張力只受溫度影響同樣的壓力下,相對(duì)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之間時(shí)，最有利于水滴的蒸發(fā)。最大不要超過100m/s（管道允許速度）。蒸汽速度要足夠高，以保證水滴能夠懸浮在其中，不會(huì)落到蒸汽管道內(nèi)壁，損壞管道。最小不小于8m/s。減壓后的蒸汽速度2024/2/17?2006.CCI–ControlComponentsInc.CCIistheValveDoctor?.Allrightsreserved.P84214流動(dòng)范圍（蒸汽管道直徑）2024/2/17?2006.CCI–ControlComponentsInc.CCIistheValveDoctor?.Allrightsreserved.P84215差的減溫效果圖像(水霧與過熱蒸汽的接觸面積)熱成像效果圖蒸汽管道紅顏色區(qū)域—溫度高綠顏色區(qū)域---水和蒸汽混合很差的溫度控制效果2024/2/17?2006.CCI–ControlComponentsInc.CCIistheValveDoctor?.Allrightsreserved.P84216熱成像蒸汽管道內(nèi)溫度均勻霧化均勻溫度控制很好好的減溫效果圖像(水霧與過熱蒸汽的接觸面積)2024/2/17?2006.CCI–ControlComponentsInc.CCIistheValveDoctor?.Allrightsreserved.P84217水霧在下游管道不同距離處的狀態(tài)

4”downstream6”downstream

15”downstream2024/2/17?2006.CCI–ControlComponentsInc.CCIistheValveDoctor?.Allrightsreserved.P84218總結(jié)水滴有沒有被擊碎(We>12?)水滴尺寸是否太大水滴會(huì)不會(huì)碰到管壁是否有足夠的距離去測(cè)量溫度CCI減溫器產(chǎn)品介紹

Desuperheater2024/2/17?2006.CCI–ControlComponentsInc.CCIistheValveDoctor?.Allrightsreserved.P84220文丘里管減溫器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可變截流孔減溫器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固定多噴嘴減溫器Appliedinmediumtosmallmassflowsystems,butmultiplevalvescanbeusedforlargesystemsPrimaryatomization:variesdependingonflowthroweachnozzleSecondaryatomization:bad,waterissprayedwiththesteamflowNozzlescantakehigherpressurethansprayringRangeabiltiyclaims>50:1.but…2024/2/17?2006.CCI–ControlComponentsInc.CCIistheValveDoctor?.Allrightsreserved.P84231輔助蒸汽減溫器Steamjetshearswateratinjectionpoint–ExcellentAtomizationoutofthenozzleHighdesuperheatingrangeability,50:1–SpraywatervalveeslimitingfactorRequiresexternalwaterspray&steamvalves2024/2/17?2006.CCI–ControlComponentsInc.CCIistheValveDoctor?.Allrightsreserved.P84232輔助蒸汽減溫器Steamjetatomizeswaterintofinedropletsforquickerevaporation-ExcellentAtomizationoutofthenozzleHighdesuperheatingrangeability,50:1–SpraywatervalveeslimitingfactorRequiresexternalwaterspray&steamvalves2024/2/17?2006.CCI–ControlComponentsInc.CCIistheValveDoctor?.Allrightsreserved.P84233一體式螺旋固定噴嘴減溫器2024/2/17?2006.CCI–ControlComponentsInc.CCIistheValveDoctor?.Allrightsreserved.P84234一體化插入式減溫器2024/2/17?2006.CCI–ControlComponentsInc.CCIistheValveDoctor?.Allrightsreserved.P84235一體化插入式減溫器彈簧背壓噴嘴2024/2/17?2006.CCI–ControlComponentsInc.CCIistheValveDoctor?.Allrightsreserved.P84236彈簧背壓噴嘴特點(diǎn)固定噴嘴彈簧被壓噴嘴固定螺旋噴嘴2024/2/17?2006.CCI–ControlComponentsInc.CCIistheValveDoctor?.Allrightsreserved.P84237彈簧背壓式噴嘴特點(diǎn)分析可調(diào)比高,達(dá)到200:1彈簧材料:INCONEL填料:石墨壓力可調(diào):可調(diào)范圍:1.5-8kg/cm2不會(huì)出現(xiàn)水滴.霧化范圍寬:成扇形面散開水滴大小均勻,水滴尺寸:20-250um,薄霧狀防止氣蝕,有背壓五級(jí)密封防堵,自清潔設(shè)計(jì)不需要單向截止閥維護(hù)簡(jiǎn)單2024/2/17?2006.CCI–ControlComponentsInc.CCIistheValveDoctor?.Allrightsreserved.P84238分體式減溫器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減溫減壓器

ConditioningValve2024/2/17?2006.CCI–ControlComponentsInc.CCIistheValveDoctor?.Allrightsreserved.P84241BTG/CCI2024/2/17?2006.CCI–ControlComponentsInc.CCIistheValveDoctor?.Allrightsreserved.P84242精確的溫度控制精確的壓力控制低噪音低振動(dòng)高可靠性低維修成本可調(diào)范圍廣嚴(yán)密關(guān)斷控制簡(jiǎn)單良好的蒸汽調(diào)節(jié)系統(tǒng)?ConditioningValve霧化效果熱應(yīng)力噪音/振動(dòng)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減溫減壓器型號(hào):VLB延長(zhǎng)導(dǎo)向閥桿,帶隔離帽壓力自密封式上閥蓋閥芯閥桿連接無(wú)銷釘一體鍛造流線型閥體彈性閥座(兩片)浮動(dòng)減壓套筒只有兩個(gè)區(qū)域需要填料密盡可能薄的壁厚2024/2/17?2006.CCI–ControlComponentsInc.CCIistheValveDoctor?.Allrightsreserved.P84250壓力密封上閥蓋內(nèi)嵌式上閥蓋,間隙配合,同軸度,穩(wěn)定性高,避免閥桿彎曲壓力自密設(shè)計(jì),不受溫度的影響超長(zhǎng)延伸灌沙空心鋼支架并配合熱隔離帽防止熱輻射,減少振動(dòng)閥內(nèi)件更容易拆卸不需要大力矩扳手2024/2/17?2006.CCI–ControlComponentsInc.CCIistheValveDoctor?.Allrightsreserved.P84251獨(dú)特閥內(nèi)件設(shè)計(jì)流線型閥體兩片式閥座設(shè)計(jì),不會(huì)受溫度急速變化而變形,隨著溫度變化而進(jìn)行補(bǔ)償,保護(hù)了閥座,并保證長(zhǎng)期密封延伸型導(dǎo)向熱應(yīng)力在一個(gè)平面閥芯閥桿無(wú)銷釘無(wú)螺紋連接2024/2/17?2006.CCI–ControlComponentsInc.CCIistheValveDoctor?.Allrightsreserved.P84252初級(jí)霧化---彈簧背壓式噴嘴2024/2/17?2006.CCI–ControlComponentsInc.CCIistheValveDoctor?.Allrightsreserved.P84253熱基膜保護(hù)熱隔離保護(hù)2024/2/17?2006.CCI–ControlComponentsInc.CCIistheValveDoctor?.Allrightsreserved.P84254VLB早期產(chǎn)品螺栓螺母式閥蓋閥桿閥芯通過螺紋連接閥座靠套筒壓緊在閥體上，直接受到高速蒸汽的沖刷調(diào)節(jié)套筒通過墊圈上下固定，高溫下沒有收縮的余地多處填料密封，增加泄漏點(diǎn)SeatControlsleeve選型依據(jù)一：直管段長(zhǎng)度及安裝選型依據(jù)：流速及其它1.正常蒸汽速度控制在20～80m/s之間，保證水滴能夠懸浮在其中有利于水滴的蒸發(fā),最小不要低于8米/秒,最大不要超過100米/秒.噪音要求低于85分貝執(zhí)行機(jī)構(gòu)帶手輪.泄漏等級(jí):ANSIV級(jí)盡量不變徑給水閥非常重要,要求金屬密封5級(jí).VST系列減溫減壓器2024/2/17?2006.CCI–ControlComponentsInc.CCIistheValveDoctor?.Allrightsreserved.P84258VSTfamily–40yearsofsteamconditioningserviceSteamconVST-100/VST-110VSTVST-SE2024/2/17?2006.CCI–ControlComponentsInc.CCIistheValveDoctor?.Allrightsreserved.P84259壓力密封上閥蓋一體鍛造閥體兩片式閥座超長(zhǎng)閥座導(dǎo)向可以在低流速霧化

可調(diào)比大于50:1保護(hù)閥座的設(shè)計(jì)輔助蒸汽強(qiáng)制霧化熱隔離措施型號(hào):VST-SE2024/2/17?2006.CCI–ControlComponentsInc.CCIistheValveDoctor?.Allrightsreserved.P84260VST-SE2024/2/17?2006.CCI–ControlComponentsInc.CCIistheValveDoctor?.Allrightsreserved.P84261VST-SE15%開度小開度時(shí)避免閥座受到?jīng)_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恒溫噴水閥非常關(guān)鍵至少V級(jí)密封2.金屬密封3.承受高壓差避免在開車工況或小流量時(shí)介質(zhì)不穩(wěn)定時(shí)對(duì)閥座的損壞帶手輪2024/2/17?2006.CCI–ControlComponentsInc.CCIistheValveDoctor?.Allrightsreserved.P84266恒溫噴水閥要求根據(jù)控制電路的要求，在任何負(fù)荷下，提供準(zhǔn)確的噴水量。2.可以在高壓降下操作（達(dá)3500psi或240bar），不會(huì)破壞閥內(nèi)件。3.可靠、一致的運(yùn)行。關(guān)閉嚴(yán)密，可以防止對(duì)閥門或下游設(shè)備（例如汽機(jī)、高旁管道）的破壞。

2024/2/17?2006.CCI–ControlComponentsInc.CCIistheValveDoctor?.Allrightsreserved.P84267恒溫噴水閥出現(xiàn)故障后帶來的后果熱效率損失。噴水閥泄漏將會(huì)使節(jié)流蒸汽溫度下降。低溫會(huì)明顯影響熱效率。此時(shí)需要增加鍋爐的熱輸入，以便使節(jié)流蒸汽溫度保持在設(shè)定值。

2.溫度控制問題。蒸汽溫度控制不準(zhǔn)確將會(huì)影響到高旁蒸汽管道和汽機(jī)。壓力超過1800psi(124bar)時(shí)，34-40F（19－22C）的溫度變化將會(huì)造成約1％的熱效率變化。3.維護(hù)費(fèi)用高。閥內(nèi)件腐蝕損壞后，需要經(jīng)常更換閥內(nèi)件或進(jìn)行維修。2024/2/17?2006.CCI–ControlComponentsInc.CCIistheValveDoctor?.Allrightsreserved.P84268ISA/IEC手冊(cè)該手冊(cè)規(guī)定了調(diào)節(jié)閥設(shè)計(jì)，尺寸及選型必須達(dá)到的最低要求并提供了控制閥的基本規(guī)范及標(biāo)準(zhǔn)該手冊(cè)闡述了流速對(duì)閥門的破壞,及對(duì)流速的控制要求2024/2/17?2006.CCI–ControlComponentsInc.CCIistheValveDoctor?.Allrightsreserved.P84269ISA手冊(cè):閥芯處的速度控制要求

嚴(yán)酷工況氣體/蒸汽的速度頭液體的流速kPam/s連續(xù)的單項(xiàng)流體48030氣蝕或多項(xiàng)流體27523振動(dòng)非常敏感的地方7512間歇工況1030-KE=

V22gc2024/2/17?2006.CCI–ControlComponentsInc.CCIistheValveDoctor?.Allrightsreserved.P84270對(duì)于管道的速度(能量)要求可接受的能量限制氣體/蒸汽可接受的速度限制液體/水kPa米/秒主管線53閥芯480302024/2/17?2006.CCI–ControlComponentsInc.CCIistheValveDoctor?.Allrightsreserved.P84271嚴(yán)酷工況伴隨的特征高溫/高壓氣蝕閃蒸噪音間隙流熱應(yīng)力維護(hù)成本高定期維護(hù)2024/2/17?2006.CCI–ControlComponentsInc.CCIistheValveDoctor?.Allrightsreserved.P84272速度控制閥原理-能量守恒P2P1VVP1P2縮流處流向2024/2/17?2006.CCI–ControlComponentsInc.CCIistheValveDoctor?.Allrightsreserved.P84273速度控制原理單級(jí)壓降DP=P1-P22024/2/17?2006.CCI–ControlComponentsInc.CCIistheValveDoctor?.Allrightsreserved.P84274速度控制原理多級(jí)壓降2024/2/17?2006.CCI–ControlComponentsInc.CCIistheValveDoctor?.Allrightsreserved.P84275CCI在1961年首先發(fā)明了第一臺(tái)迷宮閥并注冊(cè)商標(biāo)DRAG

DRAG速度控制原理單級(jí)減壓

Singlestagepressurereduction多級(jí)減壓

Multistagepressurereduction多通道多級(jí)盤片

MultipathmultistagediskDRAG盤片組合

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