Chiyambi: Kukula kwa ukadaulo wa thovu la polyurethane spray thovu
Ponena za kufunika kosunga mphamvu zomangira padziko lonse lapansi komanso kuteteza chilengedwe, thovu la polyurethane spray ngati chinthu choteteza kutentha bwino, kuchuluka kwa ntchito yake kukukulirakulira. Pakadali pano, pali njira ziwiri zazikulu zaukadaulo pamsika: makina achikhalidwe opangira thovu m'madzi ndi makina atsopano opangira thovu a HFO(hydrofluoroolefin). Monga wopanga akatswiri opanga ma catalyst a polyurethane, tidzasanthula bwino mawonekedwe aukadaulo a makina awiriwa, kusiyana kwa magwiridwe antchito, ndi momwe tingasankhire chothandizira choyenera kuti chigwire bwino ntchito.
Tsatanetsatane wa dongosolo la thovu la polyurethane lopopera madzi
Mfundo zoyambira ndi zochita za mankhwala
Dongosolo Lopopera Madzi (WBA) ndi imodzi mwa njira zamakono zopopera thovu zomwe zimagwiritsidwa ntchito kwambiri mumakampani opanga polyurethane. Mfundo yaikulu ndikugwiritsa ntchito madzi kuti agwirizane ndi isocyanate (-NCO) kuti apange carbon dioxide (CO₂) ngati mpweya wopopera thovu:
R-NCO + H₂O → R-NH₂ + CO₂↑
Izi nthawi yomweyo zimapangitsa kuti thovu likhale lolimba pang'ono ndipo limapangitsa kuti thovu likhale lolimba pang'ono. Ubwino wa njira yothira thovu m'madzi ndi monga:
- Ubwino wa mtengo: Madzi ndiye chinthu chotsika mtengo kwambiri chopukutira
- Kuteteza chilengedwe: Kulephera kwa ODP (kuchepa kwa ozoni), GWP yochepa (kutentha kwa dziko)
- Njira yokhwima: zaka zambiri za mbiri ya ntchito, magawo angwiro a njira
Munda wamba wogwiritsira ntchito
1. Chotetezera nyumba: chotenthetsera makoma ndi madenga pamalopo
2. Zinthu zozizira: zotetezera kutentha kwa magalimoto oziziritsa ndi zosungiramo zozizira
3. Mapaipi a mafakitale: oletsa dzimbiri ndi kutchinjiriza mapaipi a petrochemical
Makhalidwe a magwiridwe antchito
- Kuchuluka kwa kachulukidwe: nthawi zambiri 30-50kg/m³
- Kutentha kwa mpweya: 0.022-0.028W/(m·K)
- Chiŵerengero cha obturator: 90-95%
- Kukhazikika kwa miyeso: ≤1.5% (70℃, 48h)
Kusanthula kwa dongosolo la thovu la polyurethane lopopera la HFO
Mbadwo watsopano wa ukadaulo wa zida zopumira
Chopangira mpweya wa HFO(hydrofluoroolefin) ndi chopangira mpweya wa m'badwo wachinayi chomwe chapangidwa m'zaka zaposachedwa, chomwe chikuyimira zinthu monga HFO-1233ZD (E) ndi HFO-1336MZZ (Z). Poyerekeza ndi zopangira mpweya wa HCFCS ndi HFC, HFO ili ndi:
- GWP yotsika kwambiri: nthawi zambiri <10, yotsika kwambiri kuposa zinthu zopukutira zamtundu wa HFC
- Zero ODP: sichiwononga ozoni wosanjikiza
- Kuteteza kutentha kwabwino kwambiri: kutentha kwa gawo la mpweya kumakhala kotsika kuposa CO₂
Makhalidwe a mankhwala
Monga chopukutira chakuthupi, HFO imadalira kwambiri kukulitsa kwake kwa nthunzi kuti ipange kapangidwe ka thovu, koma imafunabe madzi kuti agwire nawo gawo la mankhwala kuti apereke mphamvu yowonjezera ya thovu:
Yankho lalikulu: Kuwonjezeka kwa nthunzi ya HFO
Zomwe zimachitika kumbali: H₂O + -NCO → CO₂ + polyurea
Zochitika zazikulu zogwiritsira ntchito
1. Kuteteza nyumba zapamwamba: Ntchito zomanga nyumba zobiriwira zomwe zimafuna chitetezo cha chilengedwe
2. Chotenthetsera chamagetsi: firiji, chotenthetsera madzi ndi zida zina zapakhomo
3. Zamlengalenga: Mapulogalamu apadera okhala ndi kulemera kofunikira komanso magwiridwe antchito
Makhalidwe a magwiridwe antchito
- Kuchuluka kwa kachulukidwe: 28-45kg/m³
- Kutentha kwa mpweya: 0.018-0.022W/(m·K)
- Chiŵerengero cha obturator: 92-97%
- Kukhazikika kwa miyeso: ≤1.2% (70℃, 48h)
Udindo wofunikira wa ma catalyst m'machitidwe onse awiri
Katundu waChothandizira cha MXC-70
MXC-70 ndi chothandizira cha amine chogwira ntchito bwino kwambiri komanso chopanda fungo loipa chomwe chapangidwira makamaka thovu lopopera la polyurethane lokhala ndi makhalidwe otsatirawa:
- Fungo lochepa: Konzani malo ogwirira ntchito ndikukwaniritsa miyezo yokhwima ya malo antchito
- Mzere wosalala wa thovu: umapereka jeli yolinganizika bwino komanso yolinganizika bwino ya thovu kuti muchepetse zolakwika pamwamba
- Kumangirira bwino: Kumakonzedwa bwino kwambiri kuti kumangirire zinthu zosiyanasiyana (chitsulo, matabwa, konkire, ndi zina zotero)
- Kugwiritsa ntchito kwakukulu: Kugwirizana ndi makina opangira thovu lamadzi ndi makina opangira thovu la HFO
Magawo aukadaulo:
- Mtundu wa mankhwala: tertiary amine complex
- Ntchito: Yapakatikati
- Kugwiritsa ntchito koyenera: 0.3-1.2php
- pH yogwiritsidwa ntchito: 7-10
Njira yothandizira mu dongosolo lotulutsa thovu m'madzi
MXC-70 imayambitsa zotsatirazi mu makina opangira thovu m'madzi:
1. Kuyankha kwa madzi ndi isocyanate (kuchita thovu)
2. Kuyankha kwa polyols ndi isocyanates (kuyankha kwa gel)
3. Kulumikizana kwa crosslinking (kuwonjezera mphamvu ya thovu)
Kapangidwe kake kapadera ka mamolekyulu kangathe kukhala ndi ntchito yochepa pagawo loyamba la thovu, ndikupereka mphamvu yokwanira ya gel pagawo lotsatira la thovu, kuti apange thovu lofanana ndi pamwamba pa thovu.
Udindo wokonza bwino dongosolo la HFO
Makina a HFO nthawi zambiri amakumana ndi mavuto otsatirawa chifukwa cha kusiyana kwa mawonekedwe a zinthu zopumira:
- Kulinganiza kwa thovu ndi gel n'kovuta kulamulira
- Kukonza pang'onopang'ono pamwamba
- Kugwirizana kwa substrate sikukhazikika
MXC-70 imakonza magwiridwe antchito a HFO system pochita izi:
1. Sinthani mkombero wokwera wa thovu kuti ugwirizane ndi mawonekedwe a nthunzi ya HFO
2. Limbikitsani kuuma pambuyo poyeretsa kuti muwongolere mawonekedwe a pamwamba
3. Kuwongolera magwiridwe antchito a mawonekedwe ndikuwongolera kunyowa kwa substrate
Malangizo osankha dongosolo ndi milandu yogwiritsira ntchito
Momwe mungasankhire njira yoyenera yopangira thovu
1. Ganizirani zofunikira pa malamulo okhudza chilengedwe
- Msika wokhwima ku Europe ndi ku United States: dongosolo la HFO lofunika kwambiri
- Mayiko Osatukuka: Makina opangira thovu la madzi akadali opikisana
2. Unikani zofunikira pakuchita bwino
- Kutentha kochepa kwambiri: Sankhani dongosolo la HFO
- Zofunikira kwambiri pa mphamvu: Makina opangira thovu la madzi angagwiritsidwe ntchito bwino
3. Kuganizira za mtengo
- Pulojekiti yotsika mtengo: Njira yothira thovu la madzi
- Mapulojekiti apamwamba: Mtengo wowonjezera wa machitidwe a HFO ukhoza kulandiridwa
Nkhani yofunsira bwino
Nkhani 1: Ntchito yomanga nyumba yobiriwira (Njira yopangira thovu la madzi)
- Gwiritsani ntchito MXC-70 catalyst mu 0.8php
- Kukwanitsa kuyendetsa bwino kutentha kwa 0.025W/(m·K)
- Kugwiritsa ntchito bwino ntchito yomanga kwawonjezeka ndi 15%
- Satifiketi ya LEED
Mlandu 2: Mzere Wopangira Firiji Wapamwamba (HFO System)
- MXC-70 yosakanikirana ndi chothandizira chapadera
- Kuthamanga kwa kutentha kwatsika kufika pa 0.019W/(m·K)
- Kuchuluka kwa thovu kwachepetsedwa ndi 12%
- Kusunga ndalama zamagetsi pachaka pafupifupi $80,000
Zochitika zamtsogolo pa chitukuko ndi tsogolo la ukadaulo
1. Kupititsa patsogolo kosalekeza kwa makina opangira thovu la madzi
- Kugwira ntchito bwino ndi ma catalyst atsopano
- Chepetsani kugwiritsa ntchito madzi kuti muchepetse kusweka
- Kupanga mankhwala oletsa moto kwambiri
2. Kupita patsogolo kwa ukadaulo wa HFO
- Kupanga zinthu zotsika mtengo zopukutira mpweya wa HFO
- Kusinthasintha kwa njira zogwirira ntchito bwino
- Kulimbitsa kukhazikika kwa dongosolo
3. Kukula kwachothandiziraukadaulo
- Chothandizira chothandizira (kuchepetsa VOC)
- Dongosolo lanzeru lothandizira (losinthika ku mikhalidwe yosiyanasiyana)
- Chothandizira cha ntchito zambiri (chothandizira + choletsa moto + chokhazikika)
Mapeto ndi malingaliro
Makina opangira thovu m'madzi ndi makina opangira thovu a HFO ali ndi ubwino wake, ndipo kusankha kumadalira zosowa za makinawo, zofunikira pa chilengedwe, komanso mtengo wake. Kaya ndi makina ati omwe akugwiritsidwa ntchito, kusankha chothandizira choyenera ndikofunikira kwambiri kuti zinthu ziyende bwino komanso kuti zinthu ziyende bwino.
MXC-70 ndi chothandizira chogwira mtima kwambiri komanso chodziwika bwino pamsika chomwe chili ndi ntchito zotsatirazi:
- Kumapereka kulinganiza bwino kwa thovu/gel pamakina opangira thovu m'madzi
- Konzani mavuto othana ndi kuchiritsa ndi kulumikiza pamwamba pa makina a HFO
- Zinthu zopanda fungo labwino zimathandiza malo ogwirira ntchito
- Kupititsa patsogolo ntchito yopangira zinthu komanso kusinthasintha kwa zinthu
Nthawi yotumizira: Epulo-15-2025