Halojeni yamadzimadzi imakhala ndi zabwino zina pakusungirako ndi kuyendetsa. Poyerekeza ndi haidrojeni, hydrogen yamadzimadzi (LH2) imakhala ndi kachulukidwe kakang'ono kwambiri ndipo imafuna kupanikizika kochepa posungira. Komabe, hydrogen iyenera kukhala -253 ° C kuti ikhale yamadzimadzi, zomwe zikutanthauza kuti ndizovuta. Kutentha kwambiri komanso kuopsa kwa kuyaka kumapangitsa kuti hydrogen yamadzimadzi ikhale yowopsa. Pachifukwa ichi, miyeso yolimba yachitetezo ndi kudalirika kwakukulu ndizofunika mosasunthika popanga ma valve ogwiritsira ntchito.
Wolemba Fadila Khelfaoui, Frédéric Blanquet
Valavu ya Velan (Velan)
Kugwiritsa ntchito madzi wa hydrogen (LH2).
Pakali pano, hydrogen yamadzimadzi imagwiritsidwa ntchito ndipo ikuyesera kugwiritsidwa ntchito pazochitika zosiyanasiyana zapadera. Muzamlengalenga, itha kugwiritsidwa ntchito ngati mafuta opangira roketi komanso imatha kupanga mafunde odabwitsa munjira zamphepo za transonic. Mothandizidwa ndi "sayansi yayikulu," hydrogen yamadzimadzi yakhala chinthu chofunikira kwambiri pamakina opangira ma superconducting, ma particle accelerators, ndi zida zophatikizira zida zanyukiliya. Pamene chikhumbo cha anthu cha chitukuko chokhazikika chikukula, hydrogen yamadzimadzi yakhala ikugwiritsidwa ntchito monga mafuta ndi magalimoto ndi zombo zambiri m'zaka zaposachedwapa. Muzochitika zomwe zili pamwambazi, kufunika kwa ma valve ndi koonekeratu. Kugwira ntchito kotetezeka komanso kodalirika kwa mavavu ndi gawo lofunikira pazachilengedwe zamadzimadzi a haidrojeni (kupanga, kuyendetsa, kusunga ndi kugawa). Ntchito zokhudzana ndi hydrogen yamadzimadzi ndizovuta. Pokhala ndi zaka zoposa 30 zachidziwitso chothandiza komanso ukadaulo wokhudzana ndi ma valve ochita bwino kwambiri mpaka -272 ° C, Velan wakhala akugwira nawo ntchito zosiyanasiyana zatsopano kwa nthawi yayitali, ndipo zikuwonekeratu kuti wapambana zovuta zaukadaulo. utumiki wa haidrojeni wamadzimadzi ndi mphamvu zake.
Zovuta mu gawo la mapangidwe
Kupanikizika, kutentha ndi kuchuluka kwa haidrojeni ndizinthu zazikulu zomwe zimawunikiridwa pakuwunika kwa chiwopsezo cha ma valve. Kuti muwongolere magwiridwe antchito a valve, kapangidwe kake ndi kusankha kwazinthu zimagwira ntchito yofunika kwambiri. Mavavu omwe amagwiritsidwa ntchito mumadzi a haidrojeni amakumana ndi zovuta zina, kuphatikiza zovuta za hydrogen pazitsulo. Pakutentha kwambiri, zida za valve siziyenera kupirira kuukira kwa mamolekyu a haidrojeni (zina zomwe zimawonongeka zimatsutsanabe m'masukulu), komanso ziyenera kukhalabe ndi ntchito yabwino kwa nthawi yayitali pa moyo wawo wonse. Pankhani ya chitukuko chamakono chamakono, makampani ali ndi chidziwitso chochepa cha kugwiritsidwa ntchito kwa zinthu zopanda zitsulo muzogwiritsira ntchito hydrogen. Posankha chinthu chosindikizira, m'pofunika kuganizira izi. Kusindikiza kogwira mtima ndichinthu chofunikira kwambiri pakupanga magwiridwe antchito. Pali kusiyana kwa kutentha kwa pafupifupi 300 ° C pakati pa hydrogen yamadzimadzi ndi kutentha kozungulira (kutentha kwa chipinda), zomwe zimapangitsa kutentha. Chigawo chilichonse cha valve chidzadutsa madigiri osiyanasiyana a kuwonjezereka kwa kutentha ndi kutsika. Kusagwirizana kumeneku kungayambitse kutayikira koopsa kwa malo osindikizira ovuta. Kutsekedwa kotsekera kwa tsinde la valve ndikonso cholinga cha mapangidwe. Kusintha kuchokera ku ozizira kupita ku otentha kumapangitsa kutentha kumayenda. Mbali zotentha za malo a bonnet zimatha kuzizira, zomwe zimatha kusokoneza magwiridwe antchito komanso kusokoneza magwiridwe antchito. Kuonjezera apo, kutentha kochepa kwambiri kwa -253 ° C kumatanthauza kuti teknoloji yabwino kwambiri yotsekemera imayenera kuonetsetsa kuti valavu ikhoza kusunga hydrogen yamadzimadzi pa kutentha uku ndikuchepetsa kutayika chifukwa cha kuwira. Malingana ngati pali kutentha komwe kumasamutsidwa ku hydrogen yamadzimadzi, imasanduka nthunzi ndi kutayikira. Osati zokhazo, mpweya wa okosijeni umapezeka pa malo otsekemera. Oxygen ikakumana ndi haidrojeni kapena zinthu zina zoyaka moto, chiwopsezo cha moto chimawonjezeka. Choncho, poganizira za ngozi ya moto imene mavavu angakumane nayo, mavavu ayenera kupangidwa poganizira za zinthu zimene sizingaphulike m’maganizo, komanso zolumikizira zosagwira moto, zida ndi zingwe, zonse zokhala ndi ziphaso zolimba kwambiri. Izi zimatsimikizira kuti valavu imagwira ntchito bwino pakabuka moto. Kuthamanga kowonjezereka kulinso chiwopsezo chomwe chingapangitse ma valve kusagwira ntchito. Ngati madzi a haidrojeni atsekeredwa m'bowo la valavu ndikutengera kutentha ndi kutuluka kwa hydrogen yamadzimadzi kumachitika nthawi yomweyo, kumayambitsa kupanikizika. Ngati pali kusiyana kwakukulu kwapakati, cavitation (cavitation) / phokoso limapezeka. Zochitika izi zimatha kuyambitsa kutha msanga kwa moyo wautumiki wa valavu, ndipo ngakhale kutayika kwakukulu chifukwa cha zolakwika zamachitidwe. Mosasamala kanthu za zochitika zenizeni zogwirira ntchito, ngati zinthu zomwe zili pamwambazi zikhoza kuganiziridwa bwino ndipo zotsutsana nazo zingatengedwe pakupanga mapangidwe, zikhoza kuonetsetsa kuti valve ikugwira ntchito yotetezeka komanso yodalirika. Kuphatikiza apo, pali zovuta zamapangidwe okhudzana ndi zovuta zachilengedwe, monga kutayikira kothawathawa. Hydrogen ndi yapadera: tinthu tating'onoting'ono, topanda mtundu, topanda fungo, komanso timaphulika. Makhalidwewa amatsimikizira kufunikira kwenikweni kwa zero kutayikira.
Ku North Las Vegas West Coast Hydrogen Liquefaction station,
Mainjiniya a Wieland Valve akupereka ntchito zaukadaulo
Mavavu zothetsera
Mosasamala kanthu za ntchito ndi mtundu wake, mavavu azinthu zonse zamadzimadzi za haidrojeni ayenera kukwaniritsa zofunikira zina. Zofunikira izi zikuphatikizapo: zinthu za gawo lachipangidwe ziyenera kuonetsetsa kuti kukhulupirika kwapangidwe kumasungidwa pa kutentha kwambiri; Zida zonse ziyenera kukhala ndi zinthu zachilengedwe zotetezera moto. Pachifukwa chomwecho, zinthu zosindikizira ndi kulongedza mavavu amadzimadzi a haidrojeni ziyeneranso kukwaniritsa zofunikira zomwe tazitchula pamwambapa. Chitsulo chosapanga dzimbiri cha Austenitic ndi chinthu chabwino pamavavu amadzi a haidrojeni. Imakhala ndi mphamvu zowononga kwambiri, imataya kutentha pang'ono, ndipo imatha kupirira kutentha kwakukulu. Palinso zida zina zomwe zilinso zoyenera pamikhalidwe ya hydrogen yamadzimadzi, koma zimangokhala pazinthu zinazake. Kuphatikiza pa kusankha kwa zipangizo, zina zapangidwe siziyenera kunyalanyazidwa, monga kukulitsa tsinde la valve ndi kugwiritsa ntchito chingwe cha mpweya kuteteza kusindikiza kusindikiza ku kutentha kwambiri. Kuphatikiza apo, kukulitsa kwa tsinde la valavu kumatha kukhala ndi mphete yotsekera kuti mupewe condensation. Kupanga ma valve molingana ndi momwe amagwiritsidwira ntchito kumathandizira kupereka mayankho omveka ku zovuta zosiyanasiyana zaukadaulo. Vellan amapereka mavavu agulugufe mumitundu iwiri yosiyana: ma valve agulugufe okhala ndi eccentric pawiri komanso katatu. Mapangidwe onsewa ali ndi kuthekera koyenda pawiri. Popanga mawonekedwe a disc ndi njira yozungulira, chisindikizo cholimba chikhoza kupezedwa. Mulibe chibowo m'thupi la valve pomwe mulibe sing'anga yotsalira. Pankhani ya Velan double eccentric butterfly valve, imagwiritsa ntchito mawonekedwe ozungulira a disc eccentric, ophatikizidwa ndi makina osindikizira a VELFLEX, kuti akwaniritse ntchito yabwino yosindikiza ma valve. Mapangidwe ovomerezekawa amatha kupirira ngakhale kusinthasintha kwakukulu kwa kutentha kwa valve. The TORQSEAL triple eccentric disc imakhalanso ndi njira yozungulira yopangidwa mwapadera yomwe imathandiza kuonetsetsa kuti malo osindikizira a disc amangokhudza mpando panthawi yomwe akufika pa malo otsekedwa a valve ndipo samakanda. Chifukwa chake, torque yotseka ya valve imatha kuyendetsa diskiyo kuti ikwaniritse malo omvera, ndikupanga mphero yokwanira pamalo otsekeka a valve, ndikupangitsa kuti diskiyo ifanane ndi gawo lonse la mpando wosindikiza. Kutsatiridwa kwa mpando wa valve kumapangitsa kuti thupi la valve ndi disc likhale ndi "kudzisintha" ntchito, motero kupewa kugwidwa kwa diski panthawi ya kusintha kwa kutentha. Chitsulo chokhazikika chachitsulo chosapanga dzimbiri chimatha kuyendetsa maulendo apamwamba ndipo chimagwira ntchito bwino pa kutentha kochepa kwambiri. Mapangidwe a VELFLEX awiri eccentric amalola kuti valve igwiritsidwe ntchito pa intaneti mofulumira komanso mosavuta. Chifukwa cha nyumba zam'mbali, mpando ndi chimbale zimatha kuyang'aniridwa kapena kutumikiridwa mwachindunji, popanda kufunikira kusokoneza makinawo kapena zida zapadera.
Malingaliro a kampani Tianjin Tanggu Water-Seal Valve Co., Ltdamathandizira ma valve okhala ndiukadaulo wapamwamba kwambiri, kuphatikiza okhala pansivalavu ya butterfly, Valavu ya butterfly, Valovu yagulugufe wapawiri wa flange, Double flange eccentric butterfly valve,Y-strainer, valve balancing,Valve yoyang'ana mbale ziwiri za Wafer, ndi zina.
Nthawi yotumiza: Aug-11-2023
