Ukuza kuthi ga ngoku, iimeko zesicelo se-cryogenic ezifuna ukutywinwa kwevalve yeendlela-mbini zisebenzise ubukhulu becala iindidi ezimbini zeevalvu, ezizezi, iivalvu zeglowubhu kunye neevalvu zebhola ezisisigxina/iivalvu zebhola ezigxilwe phezulu.Nangona kunjalo, ngophuhliso oluyimpumelelo lwevalve yebhola ye-cryogenic yeendlela ezimbini, abaqulunqi benkqubo baye bafumana ukhetho olunomtsalane ngakumbi kuneevalve zebhola zemveli-iivalve zebhola ezidadayo.Inomlinganiselo ophezulu wokuhamba, awunamthintelo kwindlela yokuhamba kunye nokutywinwa kwendlela ephakathi, kwaye inokusebenza ngokukhuselekileyo kwiimeko ze-cryogenic.Kwaye ubungakanani buncinci, ubunzima bulula, kwaye isakhiwo silula.
Iimeko zesicelo seCryogenic ezifuna iivalvu zibandakanya ukungena / ukuphuma kwamatanki okugcina ukugcwalisa kunye nokukhupha, ukucinezela imibhobho evaliweyo engenanto, i-gasification kunye ne-liquefaction, imibhobho yeenjongo ezininzi kwiinkqubo ezahlukeneyo kwizikhululo ze-LNG, iinkqubo zokuthumela, kunye neetanki , Iinkqubo zokusasaza, ukupompa. izikhululo kunye nezikhululo zokuzalisa amafutha e-LNG, kunye neeseti zevalvu yegesi yendalo (GVUs) ezinxulumene neenjini ezimbini zamafutha kwiinqanawa.
Kwiimeko zesicelo ezikhankanywe ngasentla, iivalve zokuvala iindlela ezimbini zisetyenziselwa ukulawula nokuvala umbane ophakathi.Xa kuthelekiswa nezinye iintlobo ezifanaiivalve zebhola, baneengxaki ezininzi:
I-flow coefficient (Cv) iphantsi-oku kuya kuchaphazela ukukhethwa kwazo zonke iisayizi zemibhobho efanelekileyo kwaye iya kuba ngumqobo onokuthi uthintele umthamo wenkqubo.
· Kufuneka kuqulunqwe ii-actuator ze-linear ukwenza imisebenzi yokuvala kunye nokulawula- xa kuthelekiswa ne-actuator ye-rotary ye-rectangular esetyenziselwa ukulawula kunye nokusebenza kweevalve zebhola kunye nezinye iivalve ezijikelezayo ezijikelezayo, olu hlobo lwezixhobo lunolwakhiwo olunzima kwaye luyabiza.Iindleko kunye nobunzima besakhiwo seseti epheleleyo yevalve kunye nesixhobo se-actuator zivelele kakhulu.
· Ukuba ivalve yokuvala isetyenziselwa ukuqaphela umsebenzi wokuvala unxunguphalo olufunwa ziinkqubo ezininzi ze-LNG, ubunzima buya kuba phezulu nangakumbi.
Kwizibonelelo ezincinci ze-LNG (i-SSLNG), iingxaki ezingentla ziya kubonakala ngakumbi, kuba ezi nkqubo kufuneka zibe zincinci, zingabizi kakhulu, kwaye zibe nomthamo omkhulu wokuhamba ukuze unciphise umjikelo wokulayisha kunye nokukhulula.
I-coefficient yokuhamba kwevalve yebhola iphezulu kunelo yevalve yeglowubhu yobukhulu obufanayo.Ngamanye amazwi, zincinci ngobukhulu ngaphandle kokuchaphazela izinga lokuhamba.Oku kuthetha ukuba ubukhulu, ubunzima kunye neendleko zenkqubo yonke yemibhobho kunye nenkqubo yonke iyancipha kakhulu.Kwangaxeshanye, inokunyusa kakhulu imbuyekezo kutyalo-mali (ROI) yeenkqubo ezinxulumeneyo.
Ngokuqinisekileyo, i-valve yebhola ye-cryogenic yebhola ye-float yindlela enye, engafanelekanga kwezi meko zikhankanywe ngasentla ezifuna ukutywinwa kwevalve yeendlela ezimbini.
Indlela enye Vs Indlela ezimbini
Njengoko kubonisiwe kuMfanekiso 1, ivalve yebhola edadayo esemgangathweni yeemeko ze-cryogenic inomngxuma wokunciphisa uxinzelelo kwicala elingasentla lebhola yevalve ukukhusela uxinzelelo ekuqokeleleni nasekuphakameni xa i-medium yenza utshintsho lwesigaba.Xa ivalve ikwindawo evaliweyo, igesi yendalo enyibilikisiweyo evalelwe kwicango lomzimba wevalve iya kuqalisa ukuphuphuma kwaye yandise, kwaye umthamo unokufikelela kumaxesha angama-600 kumthamo wokuqala emva kokwandiswa ngokupheleleyo, okunokubangela ukuba ivalve iqhume. .Ukuthintela le meko, uninzi lweevalvu zebhola edadayo ezisemgangathweni ziye zasebenzisa indlela yokukhulula uxinzelelo lokuvula.Ngenxa yoko, iivalve zebhola zendabuko azikwazi ukusetyenziswa kwiimeko ezifuna ukutywinwa kweendlela ezimbini.
Kwaye eli linqanaba apho ivalve yebhola ye-cryogenic float yeendlela ezimbini ingabonisa iitalente zayo.Umahluko phakathi kwesi sivalo kunye nevalve yendlela enye ye-cryogenic yile:
· Akukho kuvuleka kwibhola yevalve ukuthomalalisa uxinzelelo
• Inokutywina ulwelo macala omabini
· Akukho kuvuleka kwibhola yevalve ukuthomalalisa uxinzelelo
• Inokutywina ulwelo macala omabini
Kwindlela ezimbini zevalve yebhola edadayo ye-cryogenic, isitulo sevalvu egcwele indlela ezimbini sithatha indawo yendlela yokukhulula uxinzelelo lokuvula.Isitulo sevalvu elayishwe entwasahlobo sinokukhulula uxinzelelo olugqithisileyo oluveliswa yirhasi yendalo enyibilikisiweyo evalelwe kumngxuma womzimba wevalvu, ngaloo ndlela ithintela ivalve ekugqabhukeni, njengoko kubonisiwe kuMfanekiso 2.
Ukongezelela, isihlalo se-valve esilayishwe entwasahlobo sinceda ukugcina i-valve kwi-torque ephantsi kwaye ifezekise ukusebenza kakuhle kwiimeko ze-cryogenic.
I-valve yebhola ye-cryogenic yebhola ye-cryogenic ifakwe kwinqanaba lesibini lokutywina i-graphite, ukwenzela ukuba i-valve inomsebenzi wokhuseleko lomlilo.Ngaphandle kokuba ingozi eyingozi ibangela ukuba iindawo ze-polymer zevalve zitshise, itywina lesibini aliyi kudibana nendawo.Xa kwenzeka ingozi, uphawu lwesibini lwesibini luya kufezekisa umsebenzi wokukhusela ukhuseleko lomlilo.
Izinto eziluncedo kwiivalvu ezimbini
Xa kuthelekiswa nevalve yeglowubhu, ivalve yebhola esisigxina esisigxina kunye nephezulu, indlela ezimbini i-cryogenic float ball valve inazo zonke iingenelo zevalve yebhola ye-coefficient ephezulu, kwaye akukho sithintelo kwindlela yolwelo kunye nokutywinwa.Ingasetyenziselwa ngokukhuselekileyo kwiimeko ze-cryogenic;ubungakanani buncinci kwaye isakhiwo silula.I-actuator ehambelana nayo ilula kakhulu (i-right-angle rotation) kunye ne-miniaturized.Ezi zibonelelo zithetha ukuba yonke inkqubo incinci, ilula, kwaye ibiza kakhulu.
Xa kuthelekiswa nevalve yeglowubhu, ivalve yebhola esisigxina esisigxina kunye nephezulu, indlela ezimbini i-cryogenic float ball valve inazo zonke iingenelo zevalve yebhola ye-coefficient ephezulu, kwaye akukho sithintelo kwindlela yolwelo kunye nokutywinwa.Ingasetyenziselwa ngokukhuselekileyo kwiimeko ze-cryogenic;ubungakanani buncinci kwaye isakhiwo silula.I-actuator ehambelana nayo ilula kakhulu (i-right-angle rotation) kunye ne-miniaturized.Ezi zibonelelo zithetha ukuba yonke inkqubo incinci, ilula, kwaye ibiza kakhulu.
Itheyibhile ye-1 ithelekisa i-valve ye-cryogenic yebhola ejikelezayo yeendlela ezimbini kunye nezinye iivalve ezinemisebenzi efanayo kwiimbono zokugcinwa, ubukhulu, ubunzima, inqanaba le-torque, ubunzima bokulawula, kunye neendleko ezipheleleyo, kwaye ishwankathela ngokubanzi izibonelelo kunye nokungalunganga.
Ukuba isibonelelo esincinci se-LNG saphula isivumelwano kwaye samkele ivalve yebhola ye-cryogenic eneendlela ezimbini, inokunika umdlalo opheleleyo kwiingenelo ezizodwa zevalve yebhola, oko kukuthi, idiameter epheleleyo, isantya sokuhamba okuphezulu kunye nesantya sokukhutshwa kwemibhobho ephezulu.Ukuthetha ngokuthelekisayo, inokuxhasa imibhobho yobungakanani obuncinci ngelixa igcina isantya sokuhamba okufanayo, ngoko inokunciphisa umthamo opheleleyo, ubunzima, kunye nobunzima benkqubo, kwaye inokunciphisa iindleko zenkqubo yemibhobho.
Inqaku elandulelayo lazisa iingenelo zokusetyenziswa njengevalve yokuvala.Ukuba isetyenziswe njengevalve yokulawula, inzuzo iya kubonakala ngakumbi.Ukuba i-valve ye-rotary ye-right-angle isetyenzisiweyo, ubunzima bekiti ye-automation kit iya kuncitshiswa kakhulu, ngoko ibe yinto ekhethiweyo yenkqubo ye-cryogenic.
Owona mxholo usisiseko wekhithi yokuzenzekela ekhankanywe ngasentla yindlela elula nesebenzayo yevalve yebhola ye-cryogenic yebhola edadayo, kunye ne-rectangular rotary actuator enesakhiwo esilula kunye nokusebenza kakuhle kweendleko eziphezulu.
Ngamafutshane, ivalve yebhola ye-cryogenic edadayo enendlela ezimbini inokubaluleka “kokubhukuqa” kwinkqubo yemibhobho ye-cryogenic.Kwiindawo ezincinci ze-LNG, inokunika ukudlala ngokupheleleyo kwiinzuzo zayo.
Kwiminyaka embalwa edlulileyo, le mveliso entsha iye yaqinisekiswa kwizicelo eziphathekayo, ebonisa ukuba ibaluleke kakhulu kwiindleko zeprojekthi kunye nokusebenza okuthembekileyo kwexesha elide lenkqubo.
Ixesha lokuposa: Jun-17-2021