Kukula kwa ukadaulo wopanga HPMC ndi njira ya hydroxypropyl methyl cellulose ku China

Kukula kwa ukadaulo wopanga HPMC ndi njira ya hydroxypropyl methyl cellulose ku China

Hydroxypropyl methyl celluloseHPMCKutengera ndi ukadaulo wamakono wa njira yamadzimadzi, ukadaulo uwu ukuimiridwa ndi Wuxi Chemical Industry Research and Design Institute ku China mu 1970s, zomwe zachitika pa kafukufukuyu zimachokera ku kukwezedwa, choyambirira ndi njira ya gasi ya etherification reaction, chifukwa zida sizikugwirizana ndi dziko lathu, kenako zidagwira ntchito njira yamadzimadzi ya etherification reaction, mpaka pano njira yamadzimadzi ya etherification reaction ikadali njira yayikulu yopangira ya opanga ena odziwika bwino a cellulose ether.

Kupanga kwa HPMC m'nyumba nthawi zambiri kumagwiritsa ntchito thonje loyengedwa ngati zopangira (opanga ena adayambanso kuyesa kugwiritsa ntchito zamkati zamatabwa), ndi chopukusira chapakhomo pogaya kapena kugwiritsa ntchito mwachindunji alkaliization ya thonje loyengedwa, etherification pogwiritsa ntchito binary mixed organic solvent, reaction mu vertical reactor. Njira yoyeretsera imagwiritsa ntchito njira yosasinthasintha momwe organic solvent imachotsedwa mu reactor ndipo chinthu chosaphikidwa chimayeretsedwa kudzera mu kutsuka kangapo ndi madzi m'thupi kudzera mu scrubbers ndi centrifuges. Kukonza zinthu komalizidwa ndi granulation yosasinthasintha, pansi pa kutentha (palinso wopanga wopanda granulation), kuumitsa ndi kuphwanya mwanjira yachikhalidwe, njira zambiri zapadera zokonzera zimangochedwetsa nthawi ya hydration ya chinthu (kusungunuka mwachangu) kukonza popanda mildew kupewa ndi kugawa processing, ma CD amagwiritsa ntchito njira yamanja.

Njira ya gawo lamadzimadzi ili ndi ubwino wotsatira: kupanikizika kwamkati kwa zida zogwirira ntchito ndi kochepa, kufunikira kwa mphamvu ya kupanikizika kwa zida kumakhala kochepa, chiopsezo chochepa; Pambuyo poyika mu lye,selulosiikhoza kukulitsidwa mokwanira komanso kusinthidwa kukhala alkali mofanana. Lye ili ndi kulowa bwino kwa cellulose ndi kutupa. Choyatsira etherification ndi chaching'ono, chophatikizidwa ndi kutupa kofanana kwa alkali cellulose, kotero mtundu wa chinthucho ndi wosavuta kuwongolera, mulingo wosinthira ndi kukhuthala kungapezeke zinthu zofanana, mitundu nayonso ndi yosavuta kusintha.

Komabe, njirayi ilinso ndi zovuta izi: choyatsira nthawi zambiri sichikhala chachikulu kwambiri, zolepheretsa ziwerengero zimapangitsa kuti pakhale mphamvu zochepa zopangira, kuti pakhale bwino kutulutsa, ndikofunikira kuwonjezera chiwerengero cha ma reactor; Zinthu zopanda pake zoyeretsedwa zimafunikira zida zambiri, ntchito yovuta, mphamvu ya ogwira ntchito; Chifukwa palibe mankhwala oletsa chimfine ndi mankhwala ophatikizika, zomwe zimapangitsa kuti kukhuthala kwa zinthu kukhale kolimba komanso ndalama zopangira zimakhudzidwa; Kupaka ndi manja, mphamvu ya ogwira ntchito, mtengo wapamwamba wa ogwira ntchito; Mlingo wodziyimira pawokha wa kuwongolera zochita ndi wotsika kuposa wa njira ya gawo la mpweya, kotero kulondola kwa kuwongolera ndi kochepa. Poyerekeza ndi njira ya gawo la mpweya, machitidwe ovuta obwezeretsa zosungunulira amafunika.

Ndi kusintha kwa hydroxypropyl methyl cellulose yakunyumbaHPMCUkadaulo wopanga, mabizinesi ena kudzera mu luso lodziyimira pawokha lopitilira, njira yayikulu ya ketulo yamadzimadzi yapangidwa mwachangu kwambiri, ndipo ili ndi mawonekedwe akeake aukadaulo. Mankhwala a Anxin amagwiritsa ntchito njira yoyambirira yopanga HPMC, sikuti njira yopangira yokha ndi yoyenera, magawo owongolera magwiridwe antchito ndi olondola komanso odalirika, kugwiritsa ntchito kwathunthu komanso koyenera kwa zopangira ndi mawonekedwe ena, ndipo digiri yosinthira zinthu ndi yofanana, momwe zinthu zimachitikira ndi yokwanira, kuwonekera bwino kwa yankho ndikwabwino, komanso nthawi yomweyo kuonetsetsa kuti mtundu wazinthu umakhala wokhazikika. Mzere wopanga wa HPMC wa mabizinesi ena wakhala wosinthika wokha, kuti akwaniritse zofunikira zowongolera za DCS automation, zida kuphatikiza madzi, zopangira zolimba zingagwiritsidwe ntchito kuyeza molondola ndikuwonjezera dongosolo la DCS, kutentha ndi kuwongolera kuthamanga mu njira yochitira zonsezi zimakwaniritsidwa DCS automation control ndi kutali kuyang'anira, Ponena za kuthekera, kudalirika, kukhazikika ndi chitetezo cha kupanga, zikuwoneka kuti zasintha poyerekeza ndi njira yachikhalidwe yopanga, yomwe sikuti imangopulumutsa anthu, imachepetsa mphamvu ya ogwira ntchito, komanso imasintha malo ogwirira ntchito pamalopo.