Kubudirira kwetekinoroji yekugadzira HPMC uye maitiro ehydroxypropyl methyl cellulose muChina

Kubudirira kwetekinoroji yekugadzira HPMC uye maitiro ehydroxypropyl methyl cellulose muChina

Hydroxypropyl methyl celluloseHPMCKuburitswa kwemuno kuri kupihwa pekutanga nehunyanzvi hwekugadzira nzira yemvura, tekinoroji iyi inomiririrwa neWuxi Chemical Industry Research and Design Institute muChina Research Unit muma1970s, tsvakiridzo yakabudirira zvichibva pakusimudzirwa, yekutanga ndiyo gas phase method etherification reaction, nekuti michina haina kuenderana nenyika yedu, saka yakashanda nenzira yemvura etherification reaction, Kusvika parizvino nzira ye high bath ratio liquid phase etherification reaction ichiri nzira huru yekugadzira yevamwe vagadziri ve cellulose ether vanozivikanwa.

Kugadzirwa kweHPMC mudzimba kunowanzo shandisa donje rakanatswa sezvinhu zvakabikwa (vamwe vagadziri vakatangawo kuedza kushandisa pulp yehuni), uye grinder yemumba vachikuya kana kushandisa zvakananga alkalization yedonje rakanatswa, etherification vachishandisa binary mixed organic solvent, reaction mu vertical reactor. Maitiro ekuchenesa anoshandisa maitiro epakati nepakati umo organic solvent inobviswa mu reactor uye chigadzirwa chisina kuchena chinocheneswa kuburikidza nekushambidzwa kwakawanda uye kupera mvura kuburikidza ne scrubbers uye centrifuges. Kugadziriswa kwechigadzirwa kwakapedzwa ne intermittent granulation, pasi pemamiriro ekupisa (kunewo mugadziri asina granulation), kuomesa nekupwanya nenzira yetsika, processing yakawanda inongononoka nguva ye hydration yechigadzirwa (kukurumidza kunyungudutsa) processing pasina mildew kudzivirira uye kugovera processing, kurongedza kushandisa manual way.

Nzira yechikamu chemvura ine zvakanakira zvinotevera: kumanikidzwa kwemukati kwemidziyo ye reaction process kudiki, zvinodiwa pakukwanisa kumanikidzwa kwemidziyo zvakaderera, njodzi diki; Mushure mekuiswa mumushonga weLye,seluloseinogona kuwedzerwa zvizere uye kusanganiswa nealkali zvakaenzana. Lye ine kupinda uye kuzvimba zviri nani kwecellulose. Iyo etherification reactor idiki, pamwe chete nekuzvimba kwakafanana kwealkali cellulose, saka mhando yechigadzirwa iri nyore kudzora, mwero wekutsiva uye viscosity zvinogona kuwanikwa zvigadzirwa zvakafanana, mhando dziri nyorewo kutsiva.

Zvisinei, maitiro aya anewo matambudziko anotevera: reactor kazhinji haisi yakakura zvakanyanya, zvipingamupinyi zvehuwandu zvinotungamira kune kugona kudiki kwekugadzira, kuti zvivandudze kubuda, zvakakosha kuwedzera huwandu hwereactors; Zvigadzirwa zvisina kucheneswa uye zvakacheneswa zvinoda michina yakawanda, kushanda kwakaoma, simba revashandi; Nekuti hapana mushonga unodzivirira ganda uye mishonga yemakemikari, zvichikonzera kugadzikana kwe viscosity yechigadzirwa uye mari yekugadzira inokanganiswa; Kurongedza nemaoko, simba revashandi, mutengo wakakwira wevashandi; Dhigirii re automation re reaction control rakaderera pane remagasi phase process, saka kurongeka kwekutonga kwakaderera. Zvichienzaniswa negasi phase process, masisitimu akaomarara ekudzoreredza solvent anodiwa.

Nekuvandudzwa kwehydroxypropyl methyl cellulose yemumbaHPMCTekinoroji yekugadzira, mamwe mabhizinesi kuburikidza nekuvandudza kwakazvimirira kunoramba kuripo, nzira yechikamu chikuru chemvura mukettle yakagadzirwa nekukurumidza, uye ine hunhu hwayo hwehunyanzvi. Anxin chemistry inoshandisa maitiro ekutanga ekugadzira HPMC, kwete chete maitiro ekugadzira ane musoro, maparamita ekudzora mashandiro akarurama uye akavimbika, kushandiswa kwakazara uye kwakanaka kwezvinhu zvakagadziriswa nezvimwe hunhu, uye dhigirii rekutsiva chigadzirwa rakafanana, reaction yakakwana, kujeka kwemhinduro kwakanaka, uye panguva imwe chete kuve nechokwadi chekugadzikana kwemhando yechigadzirwa. Mutsetse wekugadzira HPMC wemamwe mabhizinesi wave uchichinja otomatiki, kuti uwane zvinodiwa zveDCS automation control zvechishandiso, zvinhu zvinosanganisira mvura, zvinhu zvakasimba zvinogona kushandiswa kuyera nekuwedzera DCS system nemazvo, tembiricha nekudzora kumanikidzwa mukuita kwe reaction zvese zvinoonekwa DCS otomatiki kudzora uye kutarisa kure, Panyaya yekugoneka, kuvimbika, kugadzikana uye kuchengetedzeka kwekugadzira, zviri pachena kuti zvakavandudzwa zvichienzaniswa nemaitiro ekugadzira echinyakare, ayo asingangochengetedze vashandi chete, anoderedza simba revashandi, asiwo anovandudza nharaunda yekushanda panzvimbo.