Kupanga kwa nayitrogeni kwa mpweya wa Cryogenic ndi njira yachikhalidwe yopanga nayitrogeni yokhala ndi mbiri yazaka makumi angapo. Imagwiritsa ntchito mpweya ngati zinthu zopangira, kukakamiza ndikuyeretsa, kenako imagwiritsa ntchito kusinthana kwa kutentha kuti isungunuke mpweya kukhala mpweya wamadzimadzi. Mpweya wamadzimadzi umakhala wosakanikirana ndi mpweya wamadzimadzi ndi nayitrogeni wamadzimadzi. Pogwiritsa ntchito nsonga zowiritsa zosiyanasiyana za okosijeni wamadzimadzi ndi nayitrogeni wamadzimadzi, nayitrogeni amapezedwa powalekanitsa kudzera mu distillation ya mpweya wamadzimadzi.
Njira yoyenda bwino
Njira yonseyi imakhala ndi kuponderezedwa kwa mpweya ndi kuyeretsa, kupatukana kwa mpweya, ndi mpweya wa nayitrogeni wamadzimadzi.
1. Kuponderezana kwa mpweya ndi kuyeretsa
Mpweya ukatsukidwa ndi fumbi ndi zonyansa zamakina ndi fyuluta ya mpweya, umalowa mu compressor ya mpweya, umakhala ndi mphamvu yofunikira, kenako umatumizidwa ku mpweya wozizira kuti uchepetse kutentha kwa mpweya. Kenako amalowa mu air drying purifier kuchotsa chinyezi, mpweya woipa, acetylene ndi ma hydrocarbon ena mumlengalenga.
2. Kupatukana kwa mpweya
Mpweya woyeretsedwa umalowa m'malo otentha otentha munsanja yolekanitsa mpweya, umakhazikika mpaka kutentha kwa machulukitsidwe ndi mpweya wa reflux (nayitrogeni wazinthu, mpweya wotayirira), ndipo umatumizidwa pansi pa nsanja ya distillation. Nayitrogeni imapezeka pamwamba pa nsanjayo, ndipo mpweya wamadzimadzi umagwedezeka ndikutumizidwa Imalowa mu evaporator ya condensation kuti ikhale nthunzi, ndipo nthawi yomweyo, gawo la nayitrogeni lomwe limatumizidwa kuchokera ku nsanja yokonzanso limafupikitsidwa. Gawo lina la nayitrogeni wamadzimadzi limagwiritsidwa ntchito ngati madzi a reflux a nsanja yokonzanso, ndipo gawo lina limagwiritsidwa ntchito ngati nayitrogeni wamadzimadzi ndikusiya nsanja yolekanitsa mpweya.
Mpweya wotulutsa mpweya wochokera ku evaporator wa condensation umatenthedwanso mpaka pafupifupi 130K ndi chotenthetsera chachikulu ndikulowa mu chowonjezera kuti chiwonjezeke ndi firiji kuti apereke kuziziritsa kwa nsanja yolekanitsa mpweya. Gawo la mpweya wokulitsidwa umagwiritsidwa ntchito kukonzanso ndi kuziziritsa kwa sieve ya maselo, kenako amatulutsidwa kudzera mu silencer. mpweya.
3. Kutentha kwa nayitrogeni wamadzimadzi
Nayitrogeni wamadzimadzi kuchokera ku nsanja yolekanitsa mpweya amasungidwa mu tanki yosungiramo nayitrogeni yamadzimadzi. Chida cholekanitsa mpweya chikawunikiridwa, nayitrogeni wamadzimadzi mu thanki yosungiramo amalowa mu vaporizer ndikutenthedwa asanatumizidwe ku payipi ya nayitrogeni.
Kupanga nayitrogeni wa cryogenic kumatha kutulutsa nayitrogeni ndi chiyero cha ≧99.999%.
chiyero
Kupanga nayitrogeni wa cryogenic kumatha kutulutsa nayitrogeni ndi chiyero cha ≧99.999%. Kuyera kwa nayitrogeni kumachepetsedwa ndi katundu wa nayitrogeni, kuchuluka kwa ma tray, kuyendetsa bwino kwa thireyi ndi kuyera kwa okosijeni mumlengalenga wamadzimadzi, ndi zina zambiri, ndipo zosintha ndizochepa.
Chifukwa chake, pagulu la zida zopangira nayitrogeni za cryogenic, kuyera kwazinthuzo kumakhala kotsimikizika ndipo ndikovuta kusintha.
Zida zazikulu zomwe zikuphatikizidwa mu chipangizo cha jenereta cha nayitrogeni cha cryogenic
1. Kusefera kwa mpweya
Pofuna kuchepetsa kuvala kwa makina osunthira mkati mwa mpweya wa compressor ndikuonetsetsa kuti mpweya uli wabwino, mpweya usanalowe mu mpweya wa mpweya, uyenera kudutsa mu fyuluta ya mpweya kuchotsa fumbi ndi zonyansa zina zomwe zili mmenemo. Kutengera mpweya kwa ma compressor a mpweya nthawi zambiri amagwiritsa ntchito zosefera zolimba kapena zosefera zapakatikati.
2. Air kompresa
Malinga ndi mfundo yogwirira ntchito, ma compressor a mpweya amatha kugawidwa m'magulu awiri: volumetric ndi liwiro. Mpweya wopondereza nthawi zambiri umagwiritsa ntchito ma compressor a mpweya wa piston, ma centrifugal air compressor ndi screw air compressor.
3. Mpweya wozizira
Amagwiritsidwa ntchito kuchepetsa kutentha kwa mpweya woponderezedwa asanalowe mu mpweya wopukuta mpweya ndi nsanja yolekanitsa mpweya, kupewa kusinthasintha kwakukulu kwa kutentha komwe kumalowa munsanja, ndipo kungathe kutulutsa chinyezi chambiri mumlengalenga wopanikizika. Zoziziritsira madzi za nayitrojeni (zopangidwa ndi nsanja zoziziritsira madzi ndi nsanja zoziziritsira mpweya: nsanja yoziziritsira madzi imagwiritsa ntchito mpweya wotayirira kuchokera pansanja yolekanitsa mpweya kuziziritsa madzi ozungulira, ndipo nsanja yoziziritsira mpweya imagwiritsa ntchito madzi ozungulira kuchokera munsanja yoziziritsira madzi kuziziritsa mpweya), Freon air cooler .
4. Chowumitsira mpweya ndi choyeretsa
Mpweya woponderezedwa umakhalabe ndi chinyezi, mpweya woipa, acetylene ndi ma hydrocarbon ena akadutsa mu choziziritsa mpweya. Chinyezi chozizira komanso mpweya woipa womwe umayikidwa munsanja yolekanitsa mpweya udzatsekereza njira, mapaipi ndi ma valve. Acetylene imadziunjikira mu oxygen yamadzimadzi ndipo pamakhala chiopsezo cha kuphulika. Fumbi lidzawononga makina ogwiritsira ntchito. Pofuna kuonetsetsa kuti ntchito yotetezeka kwa nthawi yayitali ya gawo lolekanitsa mpweya, zida zapadera zoyeretsera ziyenera kukhazikitsidwa kuti zichotse zonyansazi. Njira zodziwika bwino zoyeretsera mpweya ndi kutsatsa komanso kuzizira. Molecular sieve adsorption njira imagwiritsidwa ntchito kwambiri m'majenereta ang'onoang'ono komanso apakatikati a nayitrogeni ku China.
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5. Air kupatukana nsanja
The mpweya kupatukana nsanja makamaka zikuphatikizapo waukulu kutentha exchanger, mowa wotsekemera, distillation nsanja, condensing evaporator, etc. waukulu kutentha exchanger, condensing evaporator ndi mowa wotsekemera ndi mbale-mopotozedwa kutentha exchanger. Ndi mtundu watsopano wophatikizira wowotcha wotentha wokhala ndi zitsulo zonse za aluminiyamu. Kusiyanasiyana kwa kutentha kumakhala kochepa kwambiri ndipo kutentha kwa kutentha kumakhala kokwera kwambiri mpaka 98-99%. Nsanja ya distillation ndi chida cholekanitsa mpweya. Mitundu ya zida za nsanja imagawidwa molingana ndi magawo amkati. Nsanja ya sieve plate yokhala ndi sieve plate tower imatchedwa sieve plate tower, bubble cap tower yokhala ndi bubble cap plate imatchedwa bubble cap tower, ndipo nsanja yodzaza ndi zopakidwa zinthu zambiri imatchedwa sieve plate tower. Sieve mbale ili ndi mawonekedwe osavuta, ndi yosavuta kupanga, ndipo imakhala ndi mphamvu zambiri za mbale, motero imagwiritsidwa ntchito kwambiri mu nsanja za air fractionation distillation. Zinsanja zopakidwa zimagwiritsidwa ntchito makamaka ngati nsanja zopangira distillation zokhala ndi mainchesi osakwana 0.8m komanso kutalika osapitilira 7m. Ma Bubble cap towers tsopano sagwiritsidwa ntchito kawirikawiri chifukwa cha zovuta zake komanso zovuta zopanga.
6. Turboexpander
Ndi makina ozungulira ozungulira omwe amagwiritsidwa ntchito ndi majenereta a nayitrogeni kuti apange mphamvu yozizira. Ndi makina opangira gasi omwe amagwiritsidwa ntchito pansi pa kutentha kochepa. Turboexpanders amagawidwa mu mtundu wa axial flow, mtundu wa centripetal radial flow flow ndi mtundu wa centripetal radial otaya molingana ndi kayendedwe ka gasi mu choyikapo; molingana ndi ngati mpweya ukupitirizabe kukulirakulira mu choyikapo, imagawidwa kukhala mtundu wotsutsa ndi mtundu wa zotsatira. Kukula kopitilira ndi mtundu wa antiattack. mtundu, sichimapitiriza kukula ndikukhala mtundu wamtundu. Single-stage radial axial flow impact turbine expanders amagwiritsidwa ntchito kwambiri pazida zolekanitsa mpweya. The cryogenic air kupatukana nayitrogeni jenereta ali ndi zipangizo zovuta, dera lalikulu, mkulu zomangamanga ndalama, mkulu nthawi imodzi ndalama zida, mkulu ntchito ndalama, pang'onopang'ono mpweya kupanga (maola 12 mpaka 24), mkulu unsembe zofunika, ndi mkombero wautali. Kutengera zida, unsembe ndi zomangamanga zinthu, ndalama sikelo ya PSA zida ndi specifications chimodzimodzi kwa zipangizo pansipa 3500Nm3/h ndi 20% mpaka 50% m'munsi kuposa zida cryogenic mpweya kulekana. Chipangizo cha jenereta cha nayitrogeni cha cryogenic n'choyenera kupanga nayitrogeni m'mafakitale akuluakulu, koma kupanga nayitrogeni wapakatikati ndi pang'ono ndi kopanda ndalama.
Nthawi yotumiza: Feb-27-2024
