Isingeniso: Isimo sokuthuthukiswa kobuchwepheshe be-polyurethane spray foam
Ngenxa yokugcinwa kwamandla okwakha emhlabeni jikelele kanye nezidingo zokuvikela imvelo eziqinile, i-polyurethane spray foam njengento yokushisa esebenza kahle, ububanzi bokusetshenziswa kwayo buyanda njalo. Njengamanje, kunezindlela ezimbili zobuchwepheshe eziyinhloko emakethe: izinhlelo zendabuko zokukhipha amagwebu emanzini kanye nezinhlelo zokukhipha amagwebu ze-HFO(hydrofluoroolefin) ezisafufusa. Njengomkhiqizi ochwepheshe wama-catalyst e-polyurethane, sizohlaziya ngokuphelele izici zobuchwepheshe zezinhlelo ezimbili, umehluko wokusebenza, kanye nendlela yokukhetha i-catalyst efanele yokuthuthukisa ukusebenza kwesistimu.
Imininingwane yesistimu ye-foam ye-polyurethane spray foam
Izimiso eziyisisekelo kanye nokusabela kwamakhemikhali
Uhlelo Oluqhunyiswa Ngamanzi (i-WBA) lungenye yezindlela zobuchwepheshe zokukhiqiza amagwebu zendabuko nezivuthiwe embonini ye-polyurethane. Isimiso esiyisisekelo ukusebenzisa amanzi ukuze asabelane ne-isocyanate (-NCO) ukukhiqiza i-carbon dioxide (CO₂) njengegesi ekhipha amagwebu:
R-NCO + H₂O → R-NH₂ + CO₂↑
Lokhu kusabela ngasikhathi sinye kudala isakhiwo se-polyurea esihlinzeka ngokuqina okuyingxenye kwe-foam. Izinzuzo zesistimu yokugoba amanzi zifaka:
- Inzuzo yezindleko: Amanzi ayindlela engabizi kakhulu yokuphefumula
- Ukuvikelwa kwemvelo: Akukho ODP (amandla okuphela kwe-ozone), i-GWP ephansi (amandla okufudumala komhlaba)
- Inqubo yokuvuthwa: amashumi eminyaka omlando wohlelo lokusebenza, amapharamitha enqubo aphelele
Inkambu yohlelo lokusebenza evamile
1. Ukuvikela isakhiwo: ukuvikela izindonga nophahla endaweni okufuthwa kuyo
2. Izinto zokuthutha uchungechunge olubandayo: ukuvimbela ukushisa kwamaloli aqandisiwe kanye nendawo yokugcina ebanda
3. Amapayipi ezimboni: ukulwa nokugqwala kanye nokushisa kwamapayipi e-petrochemical
Izici zokusebenza
- Ububanzi bobuningi: ngokuvamile 30-50kg/m³
- Ukushisa: 0.022-0.028W/(m·K)
- Izinga le-Obturator: 90-95%
- Ukuqina kobukhulu: ≤1.5% (70℃, 48h)
Ukuhlaziywa kohlelo lwe-HFO foam olufutha i-polyurethane spray foam
Isizukulwane esisha sobuchwepheshe be-ejenti yokufutha ebonakalayo
I-HFO(hydrofluoroolefin) blowing agent iyi-ejenti yokufutha ebonakalayo yesizukulwane sesine eyasungulwa eminyakeni yamuva nje, emele imikhiqizo efana ne-HFO-1233ZD (E) kanye ne-HFO-1336MZZ (Z). Uma iqhathaniswa nama-HCFC endabuko kanye nama-HFC blowing agents, i-HFO inalokhu:
- I-GWP ephansi kakhulu: ngokuvamile i-<10, iphansi kakhulu kune-HFC-type blowing agents
- I-ODP Engaphelele: ayilimazi ungqimba lwe-ozone
- Ukushisa okuhle kakhulu: ukuhanjiswa kokushisa kwesigaba segesi kuphansi kune-CO₂
Izici zokusabela kwamakhemikhali
Njenge-ejenti yokufutha ebonakalayo, i-HFO incike kakhulu ekwandiseni kwayo ukuhwamuka ukuze ikhiqize isakhiwo se-foam, kodwa isadinga amanzi ukuze ahlanganyele engxenyeni yokusabela kwamakhemikhali ukuze inikeze amandla engeziwe okukhipha amagwebu:
Impendulo eyinhloko: Ukwandiswa kokuhwamuka kwe-HFO
Ukusabela okuseceleni: H₂O + -NCO → CO₂ + polyurea
Izimo eziyinhloko zohlelo lokusebenza
1. Ukufakwa kwesakhiwo okuphezulu: Amaphrojekthi okwakha aluhlaza anezidingo eziqinile zokuvikela imvelo
2. Ukufakwa kogesi: isiqandisi, isifudumezi samanzi kanye nezinye izinto zasekhaya ezifakwayo
3. Izindiza: Izinhlelo zokusebenza ezikhethekile ezinesisindo esidingayo kanye nezidingo zokusebenza
Izici zokusebenza
- Ububanzi bobuningi: 28-45kg/m³
- Ukushisa: 0.018-0.022W/(m·K)
- Izinga le-Obturator: 92-97%
- Ukuqina kobukhulu: ≤1.2% (70℃, 48h)
Indima ebalulekile yama-catalyst kuzo zombili izinhlelo
Izakhiwo zeIsikhuthazi se-MXC-70
I-MXC-70 iyisikhuthazi se-amine esisebenza kahle kakhulu, esingenaphunga eliningi esakhelwe ngqo i-polyurethane spray foam enezici ezilandelayo:
- Iphunga eliphansi: Thuthukisa indawo yokusebenza futhi uhlangabezane nezindinganiso eziqinile zomsebenzi
- Ijika elibushelelezi le-foam: linikeza ijeli elilinganisiwe kanye nebhalansi ye-foam ukunciphisa amaphutha ebusweni
- Ukunamathela okuthuthukisiwe: Kwenzelwe ngokukhethekile ukunamathela kwezingxenye ezahlukene (insimbi, ukhuni, ukhonkolo, njll.)
- Ukusebenza okubanzi: Iyahambisana nezinhlelo zokufaka amagwebu emanzini kanye nezinhlelo zokufaka amagwebu ze-HFO
Amapharamitha obuchwepheshe:
- Uhlobo lwamakhemikhali: i-tertiary amine complex
- Umsebenzi: Okuphezulu okuphakathi
- Ukusetshenziswa okunconyiwe: 0.3-1.2php
- Uhla lwe-pH olusebenzayo: 7-10
Indlela yokwenza izinto ngendlela yokulungisa amanzi ohlelweni lokukhipha amagwebu
I-MXC-70 ivuselela ukusabela okulandelayo ezinhlelweni zokukhipha amagwebu emanzini:
1. Ukusabela kwamanzi nge-isocyanate (ukusabela okuphuma amagwebu)
2. Ukusabela kwama-polyols ngama-isocyanates (ukusabela kwejeli)
3. Ukusabela kokuxhumanisa (ukwandisa amandla egwebu)
Isakhiwo sayo esiyingqayizivele sama-molecule singagcina umsebenzi olinganiselayo esigabeni sokuqala sokukhipha amagwebu, futhi sinikeze amandla ejeli anele esigabeni sokugcina sokukhipha amagwebu, ukuze kutholakale igwebu elifanayo elinobuso obuyisicaba.
Indima yokwenza ngcono ohlelweni lwe-HFO
Izinhlelo ze-HFO zivame ukubhekana nezinselele ezilandelayo ngenxa yokwehluka kwezakhiwo zomzimba zama-ejenti aqhumayo:
- Kunzima ukulawula ibhalansi ye-foam ne-gel
- Ukupholisa ubuso kancane
- Ukubopha kwe-substrate akuzinzile
I-MXC-70 ithuthukisa ukusebenza kohlelo lwe-HFO ngokuthi:
1. Lungisa ijika lokukhuphuka kwegwebu ukuze lifane nezici zokuhwamuka kwe-HFO
2. Thuthukisa ukuphulukiswa kwangemva kokwelashwa ukuze kuthuthukiswe ikhwalithi yobuso
3. Thuthukisa umsebenzi wokuxhumana futhi uthuthukise ukumanzisa kwe-substrate
Izincomo zokukhetha uhlelo kanye namacala ohlelo lokusebenza
Indlela yokukhetha uhlelo olufanele lokufaka igwebu
1. Cabanga ngezidingo zomthetho wezemvelo
- Imakethe eqinile yaseYurophu nase-United States: uhlelo lwe-HFO olubalulekile
- Amazwe Asathuthuka: Izinhlelo zokufaka amagwebu emanzini zisaqhubeka nokuncintisana
2. Hlola izidingo zokusebenza
- Ukushisa okuphansi kakhulu: Khetha uhlelo lwe-HFO
- Izidingo zamandla aphezulu: Izinhlelo zokufaka amagwebu ngamanzi zingaba ngcono
3. Izindleko okufanele uzicabangele
- Iphrojekthi elinganiselwe ngesabelomali: Uhlelo lokugoqa amanzi
- Amaphrojekthi aphezulu: Izindleko ezengeziwe zezinhlelo ze-HFO zingamukelwa
Icala lesicelo eliphumelelayo
Icala 1: Iphrojekthi yokwakha eluhlaza (Uhlelo lokugoba amanzi)
- Sebenzisa i-MXC-70 catalyst ku-0.8php
- Ukufinyelela ekuqhutshweni kokushisa okungu-0.025W/(m·K)
- Ukusebenza kahle kokwakha kukhuphuke ngo-15%
- Isitifiketi se-LEED
Icala 2: Umugqa Wokukhiqiza Iziqandisi Ezisezingeni Eliphezulu (Uhlelo lwe-HFO)
- I-MXC-70 ixutshwe ne-catalyst ekhethekile
- Ukushisa kwehle kwaba ngu-0.019W/(m·K)
- Ubuningi be-foam buncishiswe ngo-12%
- Ukonga izindleko zamandla ngonyaka okungaba ngu-$80,000
Umkhuba wentuthuko yesikhathi esizayo kanye nombono wezobuchwepheshe
1. Ukuthuthukiswa okuqhubekayo kohlelo lokugoba amanzi
- Ukusebenza okuthuthukisiwe ngama-catalyst amasha
- Nciphisa ukusetshenziswa kwamanzi ukuze unciphise ukuqhekeka
- Ukuthuthukiswa kwezakhi ezivimbela ilangabi kakhulu
2. Intuthuko yobuchwepheshe be-HFO
- Ukuthuthukiswa kwama-ejenti okushaya umoya ashibhile
- Ukuzivumelanisa nezimo kwenqubo okuthuthukisiwe
- Thuthukisa ukuzinza kohlelo
3. Ukuthuthukiswa kwei-catalystubuchwepheshe
- I-catalyst esebenzayo (ukunciphisa i-VOC)
- Uhlelo oluhlakaniphile lwe-catalytic (oluvumelana nezimo ezahlukene)
- I-catalyst enemisebenzi eminingi (i-catalytic + i-flame retardant + izinzile)
Isiphetho kanye nesiphakamiso
Izinhlelo zokufaka igwebu emanzini kanye nezinhlelo zokufaka igwebu ze-HFO ngayinye inezinzuzo, futhi ukukhetha kuncike ezidingweni ezithile zokusetshenziswa, izidingo zemvelo kanye nokucatshangelwa kwezindleko. Kungakhathaliseki ukuthi yiluphi uhlelo olusetshenziswayo, ukukhetha i-catalyst efanele kubalulekile ekuqinisekiseni ikhwalithi yomkhiqizo kanye nokusebenza kahle kokukhiqiza.
I-MXC-70 iyisikhuthazi esisebenza kahle kakhulu, esifakazelwe emakethe ngezinhlelo zokusebenza ezilandelayo:
- Inikeza ibhalansi ye-foam/gel elinganiselayo yezinhlelo zokukhipha amagwebu emanzini
- Xazulula izinselele zokulungisa ubuso kanye nokubopha izinhlelo ze-HFO
- Izici eziphansi zephunga zithuthukisa indawo yokusebenza
- Thuthukisa ukusebenza kahle kokukhiqiza kanye nokungaguquguquki komkhiqizo
Isikhathi sokuthunyelwe: Ephreli-15-2025