Mokhoa oa ho ntlafatsa tlhahiso ea ether ea cellulose?

Kima Chemical Co., Ltd nka rata ho hlahisa ntlafatso ea ts'ebetso ea tlhahiso ea cellulose ether le lisebelisoa lilemong tse leshome tse fetileng, le ho sekaseka litšobotsi tse fapaneng tsa kneader le coulter reactor ts'ebetsong ea tlhahiso ea cellulose ether. Ka tsoelo-pele e potlakileng ea indasteri ea ether ea cellulose, matla a tlhahiso ea sete e le 'ngoe ea thepa e fetoha ho tloha ho lithane tse makholo ho ea ho lithane tse likete tse' maloa. Ke mokhoa o ke keng oa qojoa hore lisebelisoa tse ncha li nkele thepa ea khale sebaka.

Mantsoe a bohlokoa: cellulose ether; thepa ea tlhahiso; kneader; coulter reactor

Ha re hetla morao lilemong tse leshome tse fetileng tsa indasteri ea cellulose ether ea China, ke lilemo tse leshome tse ntle bakeng sa nts'etsopele ea indasteri ea cellulose ether. Matla a tlhahiso ea cellulose ether e fihlile ho feta lithane tse 250,000. Ka 2007, tlhahiso ea CMC e ne e le lithane tse 122,000, 'me tlhahiso ea ether e se nang ionic cellulose e ne e le lithane tse 62,000. Lithane tse 10 000 tsa cellulose ether (ka 1999, Chaena'kakaretso ea tlhahiso ea cellulose ether e ne e le lithane tse 25,660 feela), e leng karolo e fetang kotara ea lefats'e.'s tlhahiso; dikgwebo tse ngatanyana tsa boima ba dithane tse sekete di kene maemong a dikgwebo tsa boemo ba ditone tse 10,000 ka katleho; mefuta ea lihlahisoa e eketsehile haholo , Boleng ba sehlahisoa bo 'nile ba ntlafatsoa butle-butle; ka mor'a sena sohle ke kholo e eketsehileng ea theknoloji ea ts'ebetso le ntlafatso e tsoelang pele ea boemo ba lisebelisoa tsa tlhahiso. Ha ho bapisoa le boemo bo tsoetseng pele ba kantle ho naha, lekhalo le fokotsehile haholo.

Sehlooho sena se hlahisa tsoelo-pele ea morao-rao ea ts'ebetso ea tlhahiso ea cellulose ether le ntlafatso ea lisebelisoa lilemong tsa morao tjena, 'me e hlahisa mosebetsi o entsoeng ke Zhejiang Chemical Industry Research Institute ka ho etsa lipatlisiso le ho ntlafatsa thepa ea tlhahiso ea cellulose ether e thehiloeng khopolong le monahanong oa indasteri ea lik'hemik'hale tse tala. Mosebetsi oa lipatlisiso ka cellulose ether alkalization etherification reactor.

1. Theknoloji ea tlhahiso le thepa ea malapeng cellulose ether CMC lilemong tsa bo-1990

Ho tloha ha fektheri ea Shanghai Celluloid e ntlafalitse ts'ebetso ea metsi a mahareng ka 1958, ts'ebetso ea sesebelisoa se le seng sa motlakase o tlase le lits'ebetso tse ling tsa tlhahiso li se li sebelisitsoe ho hlahisa CMC. Ka lapeng, li-kneader li sebelisoa haholo bakeng sa karabelo ea etherification. Lilemong tsa bo-1990, matla a tlhahiso ea selemo le selemo a feme e le 'ngoe ea tlhahiso ea CMC ea bahlahisi ba bangata e ne e le lithane tse 200-500,' me mefuta e ka sehloohong ea karabelo ea etherification e ne e le 1.5m.³ le 3m³ baludi. Leha ho le joalo, ha kneader e sebelisoa e le thepa ea ho arabela, ka lebaka la lebelo le liehang la letsoho le lubang, nako e telele ea ho arabela ka etherification, karolo e phahameng ea maikutlo a mahlakoreng, tekanyo e tlaase ea tšebeliso ea etherification agent, le ho se tšoane hantle ha motsoako. etherification reaction substituent distribution, the main reaction conditions Mohlala, the controllability of bath ratio, alkali concentration and kneading arm speed ha a sebetse hantle, ka hona ho thata ho elelloa homogeneity ea etherification reaction, mme ho thata le ho feta ho tsamaisa phetiso ea bongata. le lipatlisiso tsa permeation tsa karabelo e tebileng ea etherification. Ka hona, kneader e na le mefokolo e itseng joalo ka lisebelisoa tsa karabelo tsa CMC, 'me ke tšitiso ea nts'etsopele ea indasteri ea cellulose ether. Ho se lekane ha mefuta e tloaelehileng ea karabelo ea etherification lilemong tsa bo-1990 ho ka akaretsoa ka mantsoe a mararo: e nyane (e nyane e hlahisoang ke sesebelisoa se le seng), e tlase (sekhahla se tlase sa ts'ebeliso ea etherification agent), e futsanehileng (etherification reaction e nka sebaka sa The uniformity of the base distribution). mofutsana). Ka lebaka la mefokolo ea sebopeho sa kneader, hoa hlokahala ho nts'etsapele lisebelisoa tsa karabelo tse ka potlakisang karabelo ea etherification ea lintho tse bonahalang, 'me kabo ea li-substituents ka karabelo ea etherification e tšoana haholo, e le hore sekhahla sa ts'ebeliso. ea etherification agent e phahame. Qetellong ea lilemo tsa bo-1990, likhoebo tse ngata tsa malapeng tsa cellulose ether li ne li tšepile hore Setsi sa Lipatlisiso sa Zhejiang sa Indasteri ea Lik'hemik'hale se tla etsa lipatlisiso le ho hlahisa lisebelisoa tsa tlhahiso tse hlokoang ka potlako ke indasteri ea cellulose ether. Setsi sa Lipatlisiso sa Zhejiang sa Indasteri ea Lik'hemik'hale se ile sa qala ho kenya letsoho lipatlisisong tsa ts'ebetso ea ho kopanya phofo le lisebelisoa lilemong tsa bo-1970, sa theha sehlopha se matla sa R ​​& D, 'me sa fumana liphello tse khotsofatsang. Litheknoloji le lisebelisoa tse ngata li fanoe ke Lekala la Indasteri ea Lik'hemik'hale le Khau ea Tsoelo-pele ea Saense ea Zhejiang. Lilemong tsa bo-1980, re ile ra sebelisana le Setsi sa Lipatlisiso sa Mollo sa Tianjin sa Lekala la Tšireletso ea Sechaba ho hlahisa lisebelisoa tse khethehileng bakeng sa tlhahiso ea phofo e omileng, e ileng ea hapa moputso oa boraro oa Moputso oa Tsoelo-pele oa Lekala la Tšireletso ea Sechaba sa Saense le Theknoloji; lilemong tsa bo-1990, re ile ra etsa lipatlisiso le ho hlahisa theknoloji le lisebelisoa tsa ho kopanya metsi a tiileng. Ka ho tseba ka bokamoso ba tsoelo-pele ea indasteri ea cellulose ether, bafuputsi ba Zhejiang Provincial Research Institute of Chemical Industry ba ile ba qala ho etsa lipatlisiso le ho hlahisa lisebelisoa tse khethehileng tsa tlhahiso ea cellulose ether.

2. Ts'ebetso ea nts'etsopele ea reactor e khethehileng bakeng sa cellulose ether

2.1 Likarolo tsa motsoako oa coulter

Molao-motheo o sebetsang oa motsoako oa coulter ke hore tlas'a ts'ebetso ea moferefere o bōpehileng joaloka mohoma, phofo e ka mochineng e ferekanngoa haufi le lerako la silinda ka litsela tse pota-potileng le tsa radial ka lehlakoreng le leng, 'me phofo e lahleloa ka mahlakoreng a mabeli. ya mohoma ka nqa e nngwe. Litsela tsa motsamao li fapanyetsana 'me li thulana, kahoo li hlahisa moferefere o nang le moferefere' me li etsa sebaka se feletseng sa motsamao oa sebaka sa mahlakore a mararo. Ka lebaka la mokelikeli o fokolang oa thepa e tala ea li-fibrous reaction, mefuta e meng ha e khone ho tsamaisa metsamao e potolohileng, radial le axial ea selulose ka silindara. Ka lipatlisiso mabapi le ts'ebetso ea tlhahiso ea CMC le lisebelisoa tsa indasteri ea cellulose ether lapeng le kantle ho naha, ho sebelisa ka botlalo lilemo tsa eona tse 30 tsa sephetho sa lipatlisiso, motsoako oa coulter o ntlafalitsoeng ka bo-1980 o ile oa khethoa qalong e le mohlala oa mantlha oa nts'etsopele ea selulose. lisebelisoa tsa ether reaction.

2.2 Ts'ebetso ea nts'etsopele ea mochini o kopanyang motlakase

Ka teko ea mochine o monyenyane oa liteko, ka sebele o fumane phello e molemo ho feta kneader. Leha ho le joalo, ha li sebelisoa ka ho toba indastering ea cellulose ether, ho ntse ho e-na le mathata a latelang: 1) Karabelo ea etherification, fluidity ea fibrous reaction raw material e batla e futsanehile, kahoo sebopeho sa thipa ea sona le thipa e fofang ha se joalo. lekaneng. Khanna selulose hore e tsamaee ho pota-potile, radial le axial directions ea barrel, kahoo ho kopanya ha reactants ha hoa lekana, ho fella ka tšebeliso e fokolang ea li-reactants le lihlahisoa tse fokolang haholo. 2) Ka lebaka la ho thatafala ho futsanehileng ha shaft e kholo e tšehetsoeng ke likhopo, ho bonolo ho baka eccentricity ka mor'a ts'ebetso le bothata ba ho tsoa ha shaft seal; ka hona, moea o ka ntle o kena habonolo ka har'a sekontiri ka sekontiri 'me o ama ts'ebetso ea vacuum ka cylinder, e leng se hlahisang phofo ka har'a silinda. Phonyoha. 3) Li-valve tsa bona tsa ho qhala ke li-valve tsa flapper kapa li-valve tsa disc. Ea pele e bonolo ho hema moea o ka ntle ka lebaka la ts'ebetso e mpe ea ho tiisa, ha e qetellang e le bonolo ho boloka lisebelisoa le ho baka tahlehelo ea li-reactants. Ka hona, mathata ana a tlameha ho rarolloa ka bonngoe.

Bafuputsi ba ntlafalitse moralo oa mochini oa motlakase hangata, mme ba o fa likhoebo tse 'maloa tsa cellulose ether bakeng sa tšebeliso ea liteko, mme butle-butle ba ntlafatsa moralo ho latela maikutlo. Ka ho fetola sebopeho sa sebopeho sa li-coulters le tlhophiso e sisinyehileng ea li-coulters tse peli tse haufi mahlakoreng ka bobeli a moqomo o ka sehloohong, li-reactants tlas'a ketso ea li-coulters ha li na moferefere ka litsela tsa circumferential le radial hammoho le lebota le ka hare la silinda, empa. Hape Splash ka tsela e tloaelehileng ea mahlakoreng a mabeli a coulter, kahoo li-reactants li tsoakane ka ho feletseng, 'me liketso tsa alkalization le etherification li phethiloe ka mokhoa oa ho kopanya li nepahetse, tekanyo ea tšebeliso ea li-reactants e phahame, lebelo la ho arabela le potlakile. tšebeliso ea matla e tlase. Ho feta moo, litiiso tsa shaft le litulo tse jereng lipheletsong tse peli tsa silinda li behiloe poleiti ea ho qetela ea bracket ka flange ho eketsa ho tiea ha sefate se seholo, kahoo ts'ebetso e tsitsitse. Ka nako e ts'oanang, phello ea ho tiisa ha shaft seal e ka tiisetsoa hobane sefate se seholo ha se kobehe le ho senyeha, 'me phofo e ka har'a cylinder ha e balehe. Ka ho fetola sebopeho sa valve ea ho ntša metsi le ho atolosa bophara ba tanka ea ho tima, e ke ke ea thibela feela ho boloka thepa ka har'a valve ea ho ntša metsi, empa hape e thibela ho lahleheloa ke phofo ea thepa nakong ea ho qeta, kahoo e fokotsa ka katleho tahlehelo ea karabelo. lihlahisoa. Sebopeho sa reactor e ncha sea utloahala. E ke ke ea fana feela ka tikoloho e tsitsitseng le e ka tšeptjoang ea ho itokisa bakeng sa cellulose ether CMC, empa hape e thibela ka katleho phofshoana e ka har'a silinda hore e se ke ea phonyoha ka ho ntlafatsa moea oa setiiso sa shaft le valve ea ho ntša metsi. Motsoalle oa tikoloho, ho hlokomela mohopolo oa moralo oa indasteri ea lik'hemik'hale tse tala.

2.3 Ntlafatso ea mochini o kopanyang motlakase

Ka lebaka la bofokoli ba li-kneader tse nyane, tse tlase le tse futsanehileng, mochini oa coulter o kentse limela tse ngata tsa tlhahiso ea lehae tsa CMC, 'me lihlahisoa li kenyelletsa mefuta e tšeletseng ea 4m.³ke, 6m³,8m³,10m³,15m³le 26m³. Ka 2007, mochine oa coulter reactor o ile oa hapa tumello ea naha ea Utility model patent (nomoro ea khatiso ea patent: CN200957344). Ka mor'a 2007, mochine o khethehileng oa mochine oa tlhahiso ea "non-ionic cellulose ether" (joaloka MC/HPMC) o ile oa hlahisoa. Hona joale, tlhahiso ea malapeng ea CMC haholo-holo e amohela mokhoa oa solvent.

Ho ea ka maikutlo a hona joale a tsoang ho bahlahisi ba ether ea cellulose, tšebeliso ea li-coultractors e ka fokotsa tšebeliso ea solvent ka 20% ho ea ho 30%, 'me ka ho eketseha ha thepa ea tlhahiso, ho na le monyetla oa ho fokotsa ho sebelisoa ha solvent. Ho tloha ha coulter reactor e ka fihla 15-26m³, ho tšoana ha kabo ea substituent karabelo ea etherification e ntle haholo ho feta ea kneader.

3. Lisebelisoa tse ling tsa tlhahiso ea cellulose ether

Lilemong tsa morao tjena, ha ho ntse ho etsoa cellulose ether alkalization le etherification reactor, mefuta e meng e meng le eona e ntse e ntlafatsoa.

Motho ea phahamisang moea (nomoro ea khatiso ea patent: CN200955897). Ts'ebetsong ea tlhahiso ea solvent ea CMC, mochini o omisang mochini oa rake o ne o sebelisoa haholo ts'ebetsong ea ho hlabolla le ho omisa nakong e fetileng, empa mochini o omisang mochini o ka sebetsoa butle butle, athe mochini o phahamisang moea o khona ho tseba ts'ebetso e tsoelang pele. Sehlahisoa sa moea se silakanya thepa ea CMC ka ho potoloha ka potlako ha li-coulters le lithipa tse fofang ka har'a silinda ho eketsa sebaka sa phetisetso ea mocheso, 'me se fafatsa mouoane ka har'a silinda ho senya ethanol ka botlalo ho tsoa linthong tsa CMC le ho thusa ho fola, ka hona Ho fokotsa litšenyehelo tsa tlhahiso. CMC le ho boloka mehloli ea ethanol, 'me u phethe ts'ebetso ea mokhoa oa ho omisa selulose ether ka nako e le' ngoe. Sehlahisoa se na le mefuta e 'meli ea 6.2m³le 8m³.

Granulator (nomoro ea khatiso ea patent: CN200957347). Ts'ebetsong ea ho hlahisa cellulose ether ka mokhoa oa solvent, twin-screw extrusion granulator e ne e sebelisoa haholo nakong e fetileng ho granulate the sodium carboxymethyl cellulose material after etherification reaction, ho hlatsoa le ho omisa. Mofuta oa ZLH oa mofuta oa cellulose ether granulator o ke ke oa granulate feela ka mokhoa o tsoelang pele joalo ka "mafahla-screw extrusion granulator" e teng, empa hape o ka tsoela pele ho tlosa lisebelisoa ka ho fepa moea ka har'a silinda le metsi a pholileng ka har'a baki. Fetola mocheso oa litšila, ka tsela eo, ho ntlafatsa boleng ba granulation, le ho boloka motlakase, 'me e ka eketsa sekhahla sa tlhahiso ea sehlahisoa ka ho eketsa lebelo la spindle,' me e ka fetola bophahamo ba boemo ba thepa ho latela litlhoko tsa ts'ebetso. Sehlahisoa se na le mefuta e 'meli ea 3.2m³le 4m³.

Motsoako oa moea (nomoro ea khatiso ea patent: CN200939372). Motsoako oa moea oa mofuta oa MQH o romela moea o hatelitsoeng ka phaposing e kopanyang ka molomo oa hlooho e kopanyang, 'me thepa hang-hang e nyoloha ka spiral leboteng la cylinder ka moea o hatelitsoeng ho theha boemo ba ho kopanya metsi. Ka mor'a makhetlo a 'maloa a ho otla le ho emisa nako, Ho kopanya ka potlako le ho ts'oanang ha thepa ka molumo o feletseng ho ka phethahala. Liphapang pakeng tsa lihlopha tse fapaneng tsa lihlahisoa li bokelloa hammoho ka ho kopanya. Hona joale, ho na le mefuta e mehlano ea lihlahisoa: 15m³,30m³,50m³,80m³le 100m³.

Le hoja lekhalo pakeng tsa thepa ea tlhahiso ea cellulose ether ea naha ea heso le maemo a tsoetseng pele a tsoang linaheng tse ling le ntse le fokotseha, ho ntse ho hlokahala hore ho ntlafatsoe boemo ba ts'ebetso le ho etsa lintlafatso tse ling ho rarolla mathata a sa lumellaneng le thepa ea hona joale ea tlhahiso.

4. Maikutlo

indasteri ea naha ea heso ea cellulose ether e nts'etsapele ka mafolofolo moralo le ts'ebetso ea lisebelisoa tse ncha, 'me e kopanya litšobotsi tsa lisebelisoa ho tsoela pele ho ntlafatsa ts'ebetso. Baetsi le baetsi ba lisebelisoa ba se ba qalile ho theha le ho sebelisa lisebelisoa tse ncha ka kopanelo. Tsena kaofela di bontsha kgatelopele ya indasteri ya naha ya heso ya cellulose ether. , sehokelo sena se tla ba le tšusumetso ea bohlokoa ho nts'etsopele ea indasteri. Lilemong tsa morao tjena, indasteri ea naha ea heso ea cellulose ether, e thehiloeng ho thekenoloji e nang le litšobotsi tsa Sechaena, e na le phihlelo e tsoetseng pele ea machaba, e hlahisitse lisebelisoa tsa linaheng tse ling, kapa e sebelisa lisebelisoa tsa malapeng ka botlalo ho phethahatsa phetoho ea "litšila, tse litšila, tse futsanehileng" le tlhahiso ea workshop e matla haholo ho fihlela Phetoho ea ho sebetsa ka mechine le ho iketsetsa ho fihlela katleho e kholo ea bokhoni ba tlhahiso, boleng le bokhoni ba indasteri ea cellulose ether e fetohile sepheo se tloaelehileng sa bahlahisi ba selulose ba ether naheng ea heso.