I-valve yokushisa ephansi ene-valve yentamo ende izizathu zokukhetha ukukhetha kwe-valve yokushisa okuphansi okudinga ukunakwa

I-valve yokushisa ephansi ene-valve yentamo ende izizathu zokukhetha ukukhetha kwe-valve yokushisa okuphansi okudinga ukunakwa

Ama-valve okushisa aphansi ahlanganisa i-valve yokunqanyulwa kwezimo eziphuthumayo eziphuthumayo, i-valve yokusika izinga lokushisa eliphansi, i-valve yokuhlola izinga lokushisa eliphansi, i-LNG i-valve yokushisa ephansi, i-NG** i-valve yokushisa ephansi, njll., ikakhulukazi esetshenziswa amathani angu-300,000 e-ethylene, igesi yemvelo ewuketshezi. nezinye izitshalo zamakhemikhali. Uketshezi oluphumayo olunezinga lokushisa eliphansi njenge-ethylene, umoya-mpilo owuketshezi, i-hydrogen enguketshezi, igesi yemvelo ewuketshezi, imikhiqizo ye-petroleum ewuketshezi, njll., ayigcini nje ngokuvutha futhi iyaqhuma, kodwa futhi ifaka igesi lapho kushisa. Lapho i-gasification, umthamo uyanda izikhathi ezingamakhulu.
Izizathu zekhava yentamo ende yamavalvu okushisa aphansi
Ifanele izinga lokushisa eliphakathi nendawo elingu -40 ℃ ~ -196 ℃ ivalve ibizwa nge-valve yokushisa ephansi, futhi lolu hlobo lwevalvu ngokuvamile lisebenzisa isembozo se-valve yentamo ende.
I-valve yezinga lokushisa eliphansi ihlanganisa i-valve yokusika emazingeni okushisa aphansi, i-valve yokusika izinga lokushisa eliphansi, i-valve yokuhlola izinga lokushisa eliphansi, i-LNG ye-low-temperature valve, i-NG ye-low-temperature valve, njll, esetshenziswa kakhulu kumathani angu-300,000 i-ethylene, igesi yemvelo ewuketshezi nezinye izitshalo zamakhemikhali. Uketshezi oluphumayo olunezinga lokushisa eliphansi njenge-ethylene, umoya-mpilo owuketshezi, i-hydrogen enguketshezi, igesi yemvelo ewuketshezi, imikhiqizo ye-petroleum ewuketshezi, njll., ayigcini nje ngokuvutha futhi iyaqhuma, kodwa futhi ifaka igesi lapho kushisa. Lapho i-gasification, umthamo uyanda izikhathi ezingamakhulu
Ikhava yentamo ende icacisiwe ngoba:
(1) Isembozo sevalvu yentamo ende sinomsebenzi wokuvikela ibhokisi lokupakisha i-valve lokushisa eliphansi, ngoba ukuvala ibhokisi lokupakisha kungenye yezihluthulelo zevalvu ephansi yokushisa. Uma ibhokisi lokugxusha livuza, lizonciphisa umphumela wokupholisa futhi liholele ekufakweni kwegesi kwegesi eliwuketshezi. Emazingeni okushisa aphansi, ngokuncipha kwezinga lokushisa, ukuqina kokupakisha kuyanyamalala kancane kancane, futhi ukusebenza kobufakazi bokuvuza kuyehla. Ngenxa yokuvuza kwemidiya, ukupakisha kanye nesiqu se-valve kufriziwe, okuthinta ukusebenza okuvamile kwesiqu se-valve. Ngesikhathi esifanayo, ukupakishwa kwe-pulp kuyaklwebha ngenxa yokunyakaza kwesiqu se-valve phezulu naphansi, okubangela ukuvuza okukhulu. Ngakho-ke, kuyadingeka ukuqinisekisa ukuthi izinga lokushisa lesisekelo sokugcwalisa lingaphezulu kuka-8 ℃.
(2) Isakhiwo sesembozo se-valve yentamo ende kulula ukusonga okokugcina okubandayo ukuvimbela ukulahleka kwamandla abandayo wevalvu ephansi yokushisa.
(3) Isakhiwo sentamo ende yevalvu yokushisa ephansi kusiza ukushintshwa ngokushesha kwezingxenye zevalvu eziyinhloko ngokususa ikhava yevalvu. Njengoba amapayipi enqubo kanye nama-valve esigabeni esibandayo sempahla evame ukufakwa 'ebhokisini elibandayo', ikhava yevalvu yentamo ende inganwetshwa ngodonga 'lwebhokisi elibandayo'. Ukubuyisela ingxenye ye-valve MAIN, vele ususe ngesembozo se-valve, ngaphandle kokukhipha umzimba. Umzimba we-valve kanye nepayipi kushiselwe kube yinto eyodwa, ngangokunokwenzeka ukuze kuncishiswe ukuvuza kwebhokisi elibandayo, ukuqinisekisa ukuvaleka kwevalvu.
I-oda lokukhethwa kwe-valve lokushisa eliphansi libalulekile elidinga ukunakwa
I-valve yokushisa ephansi ibhekisela ku-valve engasetshenziswa ngaphansi kwesimo sokushisa esiphansi. Ngokuvamile, i-valve okushisa kwayo okusebenzayo kungaphansi kuka -40 ℃ ibizwa ngokuthi i-valve yokushisa ephansi. I-valve yokushisa ephansi ingenye yemishini ebalulekile embonini ye-petrochemical, ukuhlukaniswa komoya, igesi yemvelo nezinye izimboni. Izinga layo linquma ukuthi ingakhiqizwa ngokuphepha, ngokonga nangokuqhubekayo. Ngokuthuthukiswa kobuchwepheshe besimanje, ukusetshenziswa kwe-valve yokushisa okuphansi kuya ngokuya kubanzi, isidingo siphinde sibe sikhulu kakhulu.
Ezingeni lokushisa elingaphezu kuka -50 ℃, ngokuvamile ungasebenzisi isakhiwo sentamo ende, izinga lokushisa elingaphansi kuka -50 ℃ ivalve yebhola, ubude bentamo T ngokusho komklamo nokubala kwenkampani ye-Yijie valve. I-valve yebhola yokushisa ephansi isetshenziselwa ikakhulukazi ukukhishwa kwemidiya yokushisa ephansi ye-liquid efana ne-ethylene, i-oxygen ewuketshezi, i-liquid hydrogen, i-liquefied igesi yemvelo, imikhiqizo ye-petroleum e-liquefied, njll., hhayi nje kuphela okuvuthayo nokuqhuma, kodwa futhi ekushiseni kuya ku-gasification, i-gasification. , ukunwetshwa kwevolumu izikhathi ezingamakhulu.
Impahla ye-valve yegesi yemvelo ewuketshezi ibaluleke kakhulu, impahla ayifaneleki, izobangela ukuvuza kwegobolondo nokuvala indawo noma ukuvuza; Izakhiwo ezibanzi zemishini, amandla kanye nensimbi yezingxenye azikwazi ukuhlangabezana nezidingo zokusetshenziswa noma ukuphuka. Okuholela ekuvuzeni kwegesi yemvelo ewuketshezi. Ngakho-ke, ohlelweni lokuthuthukisa, ukuklama kanye nokuthuthukisa ama-valve egesi yemvelo e-liquefied, impahla iyinkinga yokuqala nebalulekile. Umzimba wevalvu nekhava okutholwayo: LCB(-46℃), LC3(-101℃), CF8(304)(-196℃).
I-valve yokushisa ephansi idinga ukusebenzisa isakhiwo sekhava ye-valve yentamo ende, usuku lwayo ukunciphisa ukushisa okungenayo kwangaphandle kudivayisi; Qinisekisa ukuthi izinga lokushisa lebhokisi lokupakisha lingaphezulu kuka-0℃, ukuze ukupakisha kusebenze ngokujwayelekile; Vimbela ukuqanda noma ukuqhwaza kwesiqu kanye nengxenye engenhla yebhonethi engxenyeni yebhokisi lokugxusha ngenxa yengxenye yebhokisi lokugxusha eliphole kakhulu.
Ukwakhiwa kwesembozo se-valve yentamo ende ikakhulukazi ukuklama kobude bentamo L, L ibhekisela ebangeni elisuka phansi kwebhokisi lokugxusha liye endaweni engaphezulu yesihlalo sokuvala, kuhlobene nokuhamba okushisayo kwempahla, indawo ye-thermal conductivity kanye ne-coefficient yokushisa kokushisa okungaphezulu, indawo yokushisa ukushisa nezinye izici, ukubala kuyinkimbinkimbi kakhulu, ngokuvamile etholakala ngendlela yokuhlola.
Izimo zokusebenza ze-valve yezinga lokushisa eliphansi zinzima. Iningi lemithombo yezindaba esebenzayo iyizinto ezivuthayo, eziqhumayo nezikwazi ukungena ngaphakathi. Izinga lokushisa eliphansi lokusebenza lingafinyelela -269 ℃ futhi ingcindezi yokusebenza ephezulu ingafinyelela ku-10MPa. Ngakho-ke, ukuklama, ukukhiqizwa nokuhlolwa kwama-valve okushisa aphansi kuhluke kakhulu kuma-valve wendawo yonke.
Abantu abaningi, vele ubeke impahla ye-valve insimbi ephansi yokushisa ibhekwa ngokuqondile njengama-valve e-cryogenic, empeleni ngaphandle kwalokho, i-valve ye-cryogenic yemikhiqizo eqediwe kuphela, ngoba ayizange emva kokwelashwa kwe-cryogenic ekushiseni okuphansi, nokushisa okuphansi. Ukwelashwa kwe-cryogenic kuyi-nods eyeball pen yama-valve e-cryogenic, ama-valve e-cryogenic ekwelapheni i-cryogenic kuyisihluthulelo, ukuze kuqinisekiswe ukuthi yonke imingcele yama-valve e-cryogenic ihlangabezana nezidingo, Ikakhulukazi i-coefficient yokwandisa, ngeke iholele ekusetshenzisweni kwe-valve ehlukahlukene. . Ngezinye izikhathi kucatshangelwa intengo inkinga, futhi kudingeka ucabangele izinga valve. I-valve yokushisa ephansi i-valve ekhethekile.
Manje ama-valve amaningi e-cryogenic afuywayo empeleni awakho ngemva kokwelashwa kwe-cryogenic ekushiseni okuphansi, izindleko zizobiza, lapha ngingakunikeza umsebenzi onzima, uma isethi yakho yezindleko zemishini ye-cryogenic iphezulu, imishini ye-cryogenic iyabiza, kanye ne-cryogenic liquid nitrogen. ngaphezu impahla edingekayo futhi isitoreji medium embi, futhi kudliwe valve in the processing nitrogen liquid kakhulu, Futhi liquid nitrogen akuzona ezishibhile. I-valve yokushisa ephansi ekhiqizwa ukwelashwa okukhethekile okushisa okuphansi, izingxenye zomshini onzima endaweni yokupholisa amahora ambalwa (amahora angu-2-8), ukukhulula ukucindezeleka, ukuqinisekisa ukusebenza okuphansi kwezinga lokushisa kwezinto, ukuqinisekisa usayizi wokuqeda, vimbela i-valve esimweni sokushisa esiphansi, ngenxa yezinguquko zokushisa ezibangelwa ukuguqulwa okubangelwa ukuvuza kwe-valve yokushisa ephansi.
I-oda lokukhethwa kwe-valve lokushisa eliphansi libalulekile elidinga ukunakwa:
Ukuze wenze i-valve ye-cryogenic ihlangabezane kangcono nezidingo zokusetshenziswa kwekhasimende, uma udinga i-valve ye-cryogenic, sicela unikeze imingcele ethile oyaziyo.
1. Igama lezinga lokushisa eliphansi;
2. Izinga lokushisa eliphansi lokushisa medium;
3. Udinga ukwenza ngokwezifiso ubude bentamo ende ye-valve yokushisa ephansi, enganikezwa ngokuvumelana nezinga le-valve;
4. Impahla ye-valve yokushisa ephansi (ingenziwa ngokwezifiso ngokuvumelana nezidingo zamakhasimende);
5. Ingcindezi ye-valve yokushisa ephansi;
6. Ukushisa okuphansi kwe-valve seal (uphawu oluthambile noma uphawu oluqinile);
7. Imodi yokuxhuma (uxhumano lwe-flange noma i-welding);
8. Imodi yokushayela (i-manual, i-pneumatic, kagesi).