1. Kodi cholinga chachikulu cha HPMC ndi chiyani?
Chogulitsachi chimagwiritsidwa ntchito ngati chokhuthala, chosungunula, chomangira, chowonjezera, chophimba chosagwira mafuta, chodzaza, chosakaniza ndi chokhazikika mumakampani opanga nsalu. Chimagwiritsidwanso ntchito kwambiri mu utomoni wopangidwa, petrochemical, ceramic, mapepala, zikopa, mankhwala, chakudya ndi zodzoladzola.
2. Kodi ntchito yaHPMCmu ufa wa putty wamkati mwa khoma?
HPMC ili ndi ntchito zitatu: ufa wa putty wa khoma lamkati, kukhuthala, kutseka madzi ndi kumanga. Kukhuthala: Methyl cellulose imatha kusungunuka pogwiritsa ntchito yankho loyandama kapena lamadzi kuti lisunge ntchito zofanana komanso zogwirizana ndikuletsa kuyenda ndi kutsamira. Madzi otseka: Ufa wa khoma lamkati umauma pang'onopang'ono, ndipo calcium ya laimu yowonjezera imaonekera pogwiritsa ntchito madzi. Kapangidwe ka uinjiniya: Methyl cellulose ili ndi ntchito yonyowetsa, yomwe ingapangitse ufa wa putty wamkati wa khoma kukhala ndi kapangidwe kabwino ka uinjiniya. HPMC sichita nawo kusintha kwa mankhwala onse, koma imangotenga nawo mbali pakubwezeretsanso. Ufa wa putty wamkati wa khoma, womwe uli pakhoma, ndi kusintha kwa mankhwala, chifukwa pali kusintha kwa mankhwala kwatsopano, ufa wa putty wamkati wa khoma umachotsedwa pakhoma, kuphwanyidwa, ndikugwiritsidwanso ntchito, Chifukwa cha mankhwala atsopano (calcium bicarbonate) apangidwa. Zigawo zazikulu za ufa wa calcium wa imvi ndi izi: chisakanizo cha Ca(OH)2, CaO ndi CaCO3 yochepa, CaO+H2O=Ca(OH)2 —Ca(OH)2+CO2=CaCO3↓+H2O calcium wa imvi m'madzi ndi mumlengalenga Pansi pa mphamvu ya CO2, calcium carbonate imapangidwa, pomwe HPMC imasunga madzi okha ndikuthandizira kuti calcium ya imvi igwire bwino ntchito, ndipo sichita nawo chilichonse chomwe chimachitika.
3. Momwe mungaweruzire khalidwe laHPMCmosavuta komanso mwachibadwa?
(1) Kuyera: Ngakhale kuyera sikungathe kudziwa ngati HPMC ndi yosavuta kugwiritsa ntchito, ndipo ngati chowunikira chiwonjezedwa popanga, chidzakhudza ubwino wake. Komabe, zinthu zabwino zimakhala ndi kuyera bwino. (2) Kuyera: Kuyera kwa HPMC nthawi zambiri kumakhala ma mesh 80 ndi ma mesh 100, ma mesh 120 ndi ochepa, ndipo ma HPMC ambiri opangidwa ku Hebei amakhala ma mesh 80. Kuyera bwino kwambiri, kumakhala bwino kwambiri. (3) Kutumiza: Ikani hydroxypropyl methylcellulose (HPMC) m'madzi kuti apange colloid yowonekera, ndikuyang'ana momwe imatumizira. Kutumiza kwakukulu, kumakhala bwino, zomwe zikusonyeza kuti mkati mwake mulibe zinthu zambiri zosasungunuka. Kulowa kwa vertical reactor nthawi zambiri kumakhala bwino, ndipo horizontal reactor imakhala yoipa, koma sizikutanthauza kuti mtundu wa vertical reactor ndi wabwino kuposa wa horizontal reactor. Ubwino wa chinthucho umatsimikiziridwabe ndi zinthu zambiri. (4) Kuchuluka: Kuchuluka kwakukulu, kulemera kwambiri kumakhala bwino. Kuchuluka kwa hydroxypropyl kumachitika chifukwa cha kuchuluka kwa hydroxypropyl m'madzi, ndipo kuchuluka kwa hydroxypropyl m'madzi, kumakhala bwino kwambiri.
4. Kodi ndi chiyani chomwe chiyenera kusamalidwa pogwiritsira ntchito kukhuthala ndi kutentha kwa HPMC?
Kukhuthala kwa HPMC kumagwirizana kwambiri ndi kutentha, ndiko kuti, kukhuthala kumawonjezeka pamene kutentha kukuchepa. Nthawi zambiri timati kukhuthala kwa chinthu kumatanthauza zotsatira za kuyesa yankho lake lamadzi la 2% pa kutentha kwa madigiri 20 Celsius. Mu ntchito zenizeni, m'madera omwe kutentha kwake kuli kosiyana kwambiri pakati pa chilimwe ndi nyengo yozizira, ziyenera kudziwika kuti ndi bwino kugwiritsa ntchito kukhuthala kochepa m'nyengo yozizira, komwe kumakhala kothandiza kwambiri pakupanga. Kupanda kutero, kutentha kukakhala kochepa, kukhuthala kwa cellulose kudzawonjezeka, ndipo dzanja lidzamva kulemera likakwezedwa.
5. Kodi njira zosungunula za HPMC ndi ziti?
Njira yosungunula madzi otentha: Popeza HPMC siisungunuka m'madzi otentha, HPMC imatha kusungunuka mofanana m'madzi otentha poyamba, kenako n’kusungunuka mofulumira ikazizira. Njira ziwiri zodziwika bwino zafotokozedwa motere: 1). Kuchuluka kwa madzi otentha ndikutenthedwa kufika pa 70°C. Pang'onopang'ono onjezerani hydroxypropyl methylcellulose pang'onopang'ono ndikusakaniza pang'onopang'ono, yambani HPMC kuyandama pamwamba pa madzi, kenako pang'onopang'ono pangani slurry, ndikuziziritsa slurry ndikusakaniza. 2). Onjezani 1/3 kapena 2/3 ya madzi ofunikira mu chidebe ndikutenthetsa kufika pa 70°C. Malinga ndi njira ya 1), falitsani HPMC kuti mukonze slurry ya madzi otentha; kenako onjezerani madzi ozizira otsala ku madzi otentha. Mu slurry, ziziritsani chisakanizocho mutatha kusakaniza. Njira yosakanizira ufa: Sakanizani ufa wa HPMC ndi zinthu zina zambiri za ufa, sakanizani bwino ndi blender, kenako onjezerani madzi kuti asungunuke, kenako HPMC ikhoza kusungunuka panthawiyi popanda kusonkhana ndi kusonkhana, chifukwa ngodya iliyonse yaying'ono, pali pang'ono chabe ya HPMC. Ufawo udzasungunuka nthawi yomweyo ukakumana ndi madzi. -Opanga ufa wa Putty ndi matope amagwiritsa ntchito njira iyi. [Hydroxypropyl methyl cellulose (HPMC) imagwiritsidwa ntchito ngati chokhuthala komanso chosungira madzi mu matope a Putty powder.]
6. Kodi mlingo wa HPMC wowonjezeredwa mu ufa wa putty ndi wotani?
Kuchuluka kwaHPMCZomwe zimagwiritsidwa ntchito kwenikweni zimasiyana malinga ndi nyengo, kutentha, mtundu wa calcium wa phulusa, ufa wa putty, ndi "ubwino womwe makasitomala amafunikira". Nthawi zambiri, ndi pakati pa 4 kg ndi 5 kg. Mwachitsanzo, ufa wa putty wokongoletsera ku Beijing nthawi zambiri umakhala 5 kg; ufa wa putty ku Guizhou nthawi zambiri umakhala 5 kg nthawi yachilimwe ndi 4.5 kg nthawi yozizira; kuchuluka kwa zowonjezera ku Yunnan ndi kochepa, nthawi zambiri 3 kg-4 kg ndi zina zotero.
Nthawi yotumizira: Epulo-26-2024