Ivalve yobushushu obuphantsi enentamo ende yesigqubuthelo sezizathu zokhetho lobushushu obuphantsi bemibuzo yokufuna ukuhoywa
Iivalve zobushushu obuphantsi zibandakanya ivalve ephantsi yobushushu obuphantsi, ivalve yokusika ubushushu obuphantsi, ivalve yokukhangela ubushushu obuphantsi, LNG ivalve yobushushu obuphantsi, NG** ivalve yobushushu obuphantsi, njl., isetyenziswa ikakhulu kwiitoni ezingama-300,000 ze-ethylene, igesi yendalo enyibilikisiweyo. kunye nezinye isityalo sekhemikhali. Ulwelo oluphuma kwiqondo lobushushu elisezantsi njenge-ethylene, ioksijini elulwelo, i-hydrogen engamanzi, irhasi yendalo enyibilikisiweyo, iimveliso zepetroleum engamanzi, njl. Xa i-gasification, umthamo uyanda ngamakhulu amaxesha.
Izizathu zokuvala intamo ende yeevalvu zobushushu obuphantsi
Ilungele ubushushu obuphakathi kwe -40 ℃ ~ -196 ℃ ivelufa ibizwa ngokuba ivelufa yobushushu obuphantsi, kwaye olu hlobo lwevalve lusebenzisa isigqubuthelo sevalve yentamo ende.
Ivalve yobushushu obuphantsi ibandakanya ivalve esezantsi yobushushu obuphantsi, ivalve yokusika iqondo eliphantsi lobushushu, ivalve yokujonga ubushushu obuphantsi, LNG ivalve yobushushu obuphantsi, NG ivalve yobushushu obuphantsi, njl., isetyenziswa ikakhulu kwiitoni ezingama-300,000 ze i-ethylene, igesi yendalo enyibilikisiweyo kunye nezinye isityalo sekhemikhali. Ulwelo oluphuma kwiqondo lobushushu elisezantsi njenge-ethylene, ioksijini elulwelo, i-hydrogen engamanzi, irhasi yendalo enyibilikisiweyo, iimveliso zepetroleum engamanzi, njl. Xa i-gasification, umthamo uyanda ngamakhulu amaxesha
Isigqubuthelo sentamo ende sicacisiwe ngenxa yokuba:
(1) Isigqubuthelo sevalve yentamo ende inomsebenzi wokukhusela ibhokisi yokupakisha ivalve yobushushu obuphantsi, kuba ukutywinwa kwebhokisi yokupakisha yenye yesitshixo sevalve yobushushu obuphantsi. Ukuba ibhokisi yokupakisha iyavuza, iya kunciphisa isiphumo sokupholisa kwaye iholele kwi-gasification yegesi enolwelo. Kwiqondo lokushisa eliphantsi, ngokuhla kweqondo lokushisa, i-elasticity yokupakisha iyanyamalala ngokuthe ngcembe, kwaye ukusebenza kobungqina bokuvuza kuyancipha. Ngenxa yokuvuza kweendaba, ukupakishwa kunye ne-valve stem zikhenkcezisiwe, ezichaphazela ukusebenza okuqhelekileyo kwe-valve stem. Kwangaxeshanye, ukupakishwa kwepulp kukukrwempa ngenxa yokushukuma kwesiqu sevalve phezulu nasezantsi, kubangele ukuvuza okukhulu. Ngoko ke, kuyimfuneko ukuqinisekisa ukuba ubushushu besiseko sokuzalisa bungaphezulu kwe-8℃.
(2) Isakhiwo sevalve yentamo ende kulula ukusonga izinto ezigcinayo ezibandayo ukuthintela ukulahleka kwamandla abandayo kwivalve yobushushu obuphantsi.
(3) Ulwakhiwo lwentamo ende yevalve yobushushu obuphantsi buququzelela ukutshintshwa okukhawulezayo kweendawo eziphambili zevalve ngokususa isivalo sevalve. Kuba imibhobho yenkqubo kunye neevalvu kwicandelo elibandayo lesixhobo zihlala zifakwe 'kwibhokisi ebandayo', isigqubuthelo sevalve yentamo ende singandiswa ngodonga 'lwebhokisi ebandayo'. Ukubuyisela i-valve MAIN icandelo, susa ngokulula ngesigqubuthelo sevalve, ngaphandle kokususa umzimba. Umzimba wevalve kunye nombhobho zidityaniswe zibe nye, kangangoko kunokwenzeka ukunciphisa ukuvuza kwebhokisi ebandayo, ukuqinisekisa ukutywinwa kwevalve.
Umgangatho ophantsi wokhetho lwevalvu yombuzo womyalelo wemiba efuna ingqwalasela
Ivalve yobushushu obuphantsi ibhekisa kwivalve enokusetyenziswa phantsi kwemeko yobushushu obuphantsi. Ngokwesiqhelo, ivelufa ebushushu bayo bokusebenza bungaphantsi kwe-40℃ ibizwa ngokuba yivalve yobushushu obuphantsi. Ivalve yobushushu obuphantsi sesinye sezixhobo ezibalulekileyo kwishishini lepetrochemical, ukwahlukana komoya, igesi yendalo kunye namanye amashishini. Umgangatho wayo umisela ukuba ingaveliswa ngokukhuselekileyo, ngokwezoqoqosho nangokuzinzileyo. Ngokuphuhliswa kobuchwepheshe bale mihla, ukusetyenziswa kwevalve yeqondo lokushisa eliphantsi ngakumbi nangakumbi, imfuno nayo iyanda kwaye inkulu.
Kuba amaqondo obushushu aphezulu kuno -50 ℃, ngokuqhelekileyo musa ukusebenzisa isakhiwo intamo ende, ubushushu ngaphantsi -50 ℃ ivelufa ibhola, ubude bentamo T ngokoyilo kunye nokubala Yijie inkampani valve. Ivalve yebhola ephantsi yobushushu isetyenziselwa ukukhutshwa kolwelo olusezantsi lobushushu beendaba njenge-ethylene, ioksijini elulwelo, i-hydrogen engamanzi, igesi yendalo enolwelo, iimveliso zepetroleum ezinolwelo, njl. , ukwandiswa kwevolumu ngamakhulu amaxesha.
Izinto eziphathekayo zevalve yegesi yendalo enyibilikisiweyo ibaluleke kakhulu, izinto eziphathekayo azifanelekanga, ziya kubangela igobolondo kunye nokutywina ukuvuza komphezulu okanye ukuvuza; Iimpawu ezibanzi zoomatshini, amandla kunye nentsimbi yamacandelo akakwazi ukuhlangabezana neemfuno zokusetyenziswa okanye ukuphuka. Isiphumo sokuvuza okuphakathi kwerhasi elulwelo. Ngoko ke, kwinkqubo yokuphuhlisa, ukuyila kunye nokuphuhlisa i-valve yegesi yendalo engamanzi, into yokuqala kunye neyona nto ibalulekileyo. Umzimba wevalve kunye nesigqubuthelo sokwamkela: LCB(-46℃), LC3(-101℃), CF8(304)(-196℃).
Ivalve yeqondo lokushisa eliphantsi kufuneka isebenzise isakhiwo sevalve yentamo ende, usuku lwayo kukunciphisa ubushushu obungenayo bangaphandle kwisixhobo; Qinisekisa ukuba ubushushu bebhokisi yokupakisha bungaphezulu kwe-0℃, ukuze ukupakisha kusebenze ngokuqhelekileyo; Thintela iqabaka okanye ukukhenkceka kwesiqu kunye nenxalenye engaphezulu yebhonethi kwindawo yebhokisi yokugxumeka ngenxa yokuba inxalenye yebhokisi yokugxumeka iphole ngokugqithisileyo.
Uyilo lwesigqubuthelo sevalve yentamo ende ubukhulu becala uyilo lobude bentamo L, L ibhekisa kumgama osuka ezantsi kwebhokisi yokuhlohla ukuya kumphezulu wesihlalo sokutywina, inxulumene ne-thermal conductivity yezinto, indawo ye-thermal conductivity kunye ne-coefficient yokutshatyalaliswa kobushushu bomhlaba, indawo yokutshatyalaliswa kobushushu kunye nezinye izinto, ukubala kunzima kakhulu, ngokuqhelekileyo kufunyenwe ngendlela yokulinga.
Iimeko zokusebenza zevalve ephantsi yobushushu zinzima. Uninzi lwamajelo asebenzayo anokutsha, izinto eziqhumayo kunye nezinto ezinokuvunwa. Ubushushu obuphantsi bokusebenza bunokufikelela ku--269℃ kwaye ubuninzi boxinzelelo lokusebenza bunokufikelela kwi-10MPa. Ngoko ke, ukuyila, ukuveliswa kunye nokuhlolwa kweevalve zeqondo lokushisa eliphantsi zihluke kakhulu kwiivalve zendalo yonke.
Abantu abaninzi, beka nje izinto ivelufa yintsimbi ubushushu obuphantsi ithathwa ngokuthe ngqo iivalvu cryogenic, eneneni ngenye indlela, kuphela iivalvu cryogenic iimveliso semi-ezigqityiweyo, kuba akazange emva unyango cryogenic kubushushu obuphantsi, kunye nobushushu obuphantsi. I-cryogenic treatment yi-nods eyeball pen yeevalvu ze-cryogenic, i-valve ye-cryogenic kunyango lwe-cryogenic ingundoqo, ukuze kuqinisekiswe ukuba zonke iiparamitha ze-valve ze-cryogenic ziyahlangabezana neemfuno, Ngokukodwa i-coefficient yokwandisa, ayiyi kukhokelela kwiintlobo ezahlukeneyo zevalve ebambelele ekusebenziseni. . Ngamanye amaxesha ngokuqwalasela ixabiso lengxaki, kufuneka kwakhona ukuqwalasela umgangatho wevalve. Ivalve yobushushu obuphantsi yivalve ekhethekileyo.
Ngoku zasekhaya ezininzi iivalvu ze-cryogenic azikho emva konyango lwe-cryogenic kwiqondo lokushisa eliphantsi, ixabiso liya kuba yindleko, apha ndingakunika umsebenzi onzima, ukuba isethi yakho yeendleko zezixhobo ze-cryogenic ziphezulu, izixhobo ze-cryogenic ziyabiza, kunye ne-cryogenic liquid nitrogen. ukongeza izinto eziyimfuneko kwaye ugcino embindini, kwaye ivalufa kusetyenziselwe ulwelo nitrogen kakhulu, Kwaye ulwelo nitrogen azitshiphuki. Ivalve yobushushu obuphantsi obuveliswe ngonyango olukhethekileyo lobushushu obuphantsi, iinxalenye zomatshini orhabaxa kwindawo yokupholisa iiyure ezimbalwa (iiyure ezingama-2-8), ukukhulula uxinzelelo, qinisekisa ukusebenza kobushushu obuphantsi bezinto eziphathekayo, ukuqinisekisa ubungakanani bokugqiba, thintela i-valve kwimeko yokushisa ephantsi, ngenxa yokutshintsha kweqondo lokushisa okubangelwa ukuguqulwa okubangelwa ukuvuza kwe-valve yeqondo lokushisa eliphantsi.
Ulungelelwaniso lokhetho lwevalvu yobushushu obuphantsi lufuna ukuqwalaselwa:
Ukuze wenze ivalve ye-cryogenic ibe ngcono ukuhlangabezana neemfuno zokusetyenziswa komthengi, ukuba ufuna ivalve ye-cryogenic, nceda unikeze iparameters ezithile ozaziyo.
1. Igama lobushushu obuphantsi;
2. Ubushushu beqondo eliphantsi lobushushu;
3. Kufuneka wenze ngokwezifiso ubude bentamo ende ye-valve yeqondo lokushisa eliphantsi, elingabonelelwanga ngokuhambelana nomgangatho wevalve;
4. Izinto eziphathekayo zevalve yeqondo lokushisa eliphantsi (inokwenziwa ngokwezifiso ngokweemfuno zabathengi);
5. Uxinzelelo lwevalve yobushushu obuphantsi;
6. Isitywina sevalve yobushushu obuphantsi (isitywina esithambileyo okanye esiqinileyo);
7. Imodi yokudibanisa (uqhagamshelwano lweflange okanye i-welding);
8. Imodi yokuqhuba (i-manual, i-pneumatic, umbane).
Ixesha lokuposa: Oct-21-2022
