Ungayithuthukisa kanjani i-Cellulose Ether Production?

I-Kima Chemical Co., Ltd Ungathanda uku yethula ukuthuthukiswa kwenqubo yokukhiqiza i-cellulose ether nezinto zokusebenza eminyakeni eyishumi edlule, futhi ihlaziya izici ezihlukene ze-kneader ne-colter reactor kunqubo yokukhiqiza i-cellulose ether. Ngokuthuthuka okusheshayo kwemboni ye-cellulose ether, amandla okukhiqiza esethi eyodwa yezinto zokusebenza ashintsha kusukela kumakhulu amathani kuya kumathani ayizinkulungwane ezimbalwa. Kuwumkhuba ongagwemeki ukuthi okokusebenza okusha kuthathelwe indawo okokusebenza okudala.

Amagama angukhiye: i-cellulose ether; izinto zokukhiqiza; isixoxo; i-colter reactor

Uma sibheka emuva eminyakeni eyishumi edlule yemboni ye-cellulose ether yaseChina, ishumi leminyaka elikhazimulayo lokuthuthukiswa kwemboni ye-cellulose ether. Umthamo wokukhiqiza we-cellulose ether usufinyelele amathani angaphezu kuka-250,000. Ngo-2007, ukukhishwa kwe-CMC kwaba amathani angu-122,000, kanti ukukhishwa kwe-non-ionic cellulose ether kwaba amathani angu-62,000. amathani ayi-10,000 e-cellulose ether (ngo-1999, eChina'Ingqikithi yokukhishwa kwe-cellulose ether yayingamathani angama-25,660 kuphela), okungaphezu kwengxenye yesine yomhlaba.'s okukhiphayo; isibalo samabhizinisi esingamathani ayinkulungwane angenele ngempumelelo ezinhlwini zamabhizinisi angamathani ayi-10,000; izinhlobo zomkhiqizo ziye zanda kakhulu , Izinga lomkhiqizo liye lathuthukiswa kancane kancane; ngemuva kwakho konke lokhu ukuvuthwa okuqhubekayo kobuchwepheshe benqubo kanye nokuthuthukiswa okuqhubekayo kwezinga lemishini yokukhiqiza. Uma kuqhathaniswa nezinga elithuthukile lakwamanye amazwe, igebe linciphe kakhulu.

Lesi sihloko sethula ukuthuthukiswa kwakamuva kwenqubo yokukhiqiza i-cellulose ether yasekhaya kanye nokuthuthukiswa kwemishini eminyakeni yamuva, futhi sethula umsebenzi owenziwe yi-Zhejiang Chemical Industry Research Institute ekucwaningeni nasekuthuthukiseni imishini yokukhiqiza i-cellulose ether esekelwe embonweni nasekucabangeni kwemboni yamakhemikhali aluhlaza. Umsebenzi wocwaningo ku-cellulose ether alkalization etherification reactor.

1. Ubuchwepheshe bokukhiqiza kanye nemishini ye-cellulose ether CMC yasekhaya ngeminyaka yawo-1990

Kusukela i-Shanghai Celluloid Factory yathuthukisa inqubo yokuhlanganisa amanzi ngo-1958, inqubo yokuncibilikisa amandla aphansi yesisetshenziswa esisodwa kanye nezinye izinqubo zokukhiqiza zisetshenziselwe ukukhiqiza i-CMC. Ekhaya, ama-kneader asetshenziselwa kakhulu ukusabela kwe-etherification. Ngawo-1990, umthamo wonyaka wokukhiqiza wesitshalo esisodwa sokukhiqiza i-CMC yabakhiqizi abaningi wawungamathani angama-200-500, futhi amamodeli ajwayelekile wokusabela kwe-etherification ayengu-1.5m.³ kanye 3m³ abaxovayo. Kodwa-ke, lapho isigxobo sisetshenziswa njengento yokusabela, ngenxa yejubane elincane lengalo exovayo, isikhathi eside sokusabela kwe-etherification, ingxenye ephezulu yokusabela ohlangothini, izinga eliphansi lokusebenzisa i-ejenti yokuxova, kanye nokungafani kahle kwe-etherification. I-etherification reaction substituent ukusatshalaliswa kwe-etherification, izimo zokusabela eziyinhloko Isibonelo, ukulawuleka kwesilinganiso sokugeza, ukugxila kwe-alkali kanye nesivinini sengalo yokuxova akulungile, ngakho-ke kunzima ukuqaphela cishe ukufana kokusabela kwe-etherification, futhi kunzima nakakhulu ukuqhuba ukudluliswa okukhulu. kanye nocwaningo lwe-permeation lokusabela kwe-etherification ejulile. Ngakho-ke, i-kneader inemikhawulo ethile njengemishini yokusabela ye-CMC, futhi iyibhodlela lokuthuthukiswa kwemboni ye-cellulose ether. Ukunganeli kwamamodeli ajwayelekile wokusabela kwe-etherification ngeminyaka yawo-1990s kungafingqwa ngamagama amathathu: okuncane (okuphumayo okuncane kwedivayisi eyodwa), okuphansi (izinga eliphansi lokusetshenziswa kwe-ejenti ye-etherification), kubi (ukusabela kwe-etherification kungena esikhundleni sokufana kokusabalalisa kwesisekelo umpofu). Ngenxa yokukhubazeka esakhiweni se-kneader, kuyadingeka ukuthi kuthuthukiswe imishini yokusabela engasheshisa ukusabela kwe-etherification yento, futhi ukusatshalaliswa kwezinto ezibambekayo ekuphenduleni kwe-etherification kufana kakhulu, ukuze izinga lokusebenzisa. ye-ejenti ye-etherification iphakeme. Ngasekupheleni kwawo-1990, amabhizinisi amaningi asekhaya e-cellulose ether ayenethemba lokuthi i-Zhejiang Research Institute of Chemical Industry izocwaninga futhi ithuthukise imishini yokukhiqiza edingwa ngokushesha yimboni ye-cellulose ether. I-Zhejiang Research Institute of Chemical Industry yaqala ukuzibandakanya ocwaningweni lwenqubo yokuxuba impushana nemishini ngeminyaka yawo-1970, yakha iqembu eliqinile le-R & D, futhi yazuza imiphumela eyanelisayo. Ubuchwepheshe obuningi nemishini kuklonyeliswe nguMnyango Wemboni Yamakhemikhali kanye ne-Zhejiang Science and Technology Progress Award. Ngawo-1980, sabambisana ne-Tianjin Fire Research Institute yoMnyango Wezokuphepha Komphakathi ukuthuthukisa imishini ekhethekile yokukhiqiza impushana eyomile, eyazuza umklomelo wesithathu we-Ministry of Public Security's Science and Technology Progress Award; ngawo-1990, sacwaninga futhi sathuthukisa ubuchwepheshe bokuhlanganisa uketshezi oluqinile kanye nemishini. Beqaphela amathemba okuthuthukiswa kwesikhathi esizayo embonini ye-cellulose ether, abacwaningi be-Zhejiang Provincial Research Institute of Chemical Industry baqala ukucwaninga nokuthuthukisa imishini yokukhiqiza ekhethekile ye-cellulose ether.

2. Inqubo yokuthuthukiswa kwereactor ekhethekile ye-cellulose ether

2.1 Izici ze-colter mixer

Umgomo wokusebenza we-colter mixer ukuthi ngaphansi kwesenzo se-agitator emise okwegeja, impushana emshinini iyanyakaza eduze kodonga lwesilinda endaweni eyindilinga kanye ne-radial ngakolunye uhlangothi, futhi impushana iphonswa emaceleni amabili. wegeja ngakolunye uhlangothi. Ama-trajectories omnyakazo ayaphambana futhi ayangqubuzana, ngaleyo ndlela akhiqize i-vortex enesiphithiphithi futhi yakhe uhla olugcwele lokunyakaza kwendawo enezinhlangothi ezintathu. Ngenxa yokungaqini kahle kwe-fluidity yezinto zokusetshenziswa ze-fibrous reaction, amanye amamodeli awakwazi ukushayela ukunyakaza kwe-circumferential, radial and axial of cellulose kusilinda. Ngocwaningo lwenqubo yokukhiqiza ye-CMC kanye nemishini yemboni ye-cellulose ether ekhaya nakwamanye amazwe, isebenzisa ngokugcwele iminyaka yayo engama-30 yemiphumela yocwaningo, i-colter mixer eyakhiwa ngawo-1980 ekuqaleni yakhethwa njengemodeli eyisisekelo yokuthuthukiswa kwe-cellulose. imishini yokusabela ether.

2.2 Inqubo yokuthuthukiswa kwe-colter reactor

Ngokuhlolwa komshini omncane wokuhlola, ngempela uthole umphumela ongcono kunowoxuba. Kodwa-ke, lapho zisetshenziswa ngokuqondile embonini ye-cellulose ether, kusenezinkinga ezilandelayo: 1) Ekuphenduleni kwe-etherification, uketshezi lwezinto eziluhlaza zokusabela kwe-fibrous kubi kakhulu, ngakho-ke ukwakheka kwe-colter yayo kanye nommese endizayo akuwona. ezanele. Shayela i-cellulose ukuze ihambe ngendlela eyisiyingi, i-radial ne-axial yomphongolo, ukuze ukuxutshwa kwezinto ezisabelayo akwanele, okuholela ekusetshenzisweni okuphansi kwama-reactants kanye nemikhiqizo embalwa uma kuqhathaniswa. I-2) Ngenxa yokuqina okungalungile kwe-shaft eyinhloko esekelwe izimbambo, kulula ukubangela ukungaqondakali ngemva kokusebenza kanye nenkinga yokuvuza kwe-shaft seal; ngakho-ke, umoya wangaphandle uhlasela kalula isilinda ngokusebenzisa uphawu lwe-shaft futhi uthinte ukusebenza kwe-vacuum ku-cylinder, okuholela ekubeni impushana ku-cylinder. Phunyuka. 3) Ama-valve awo okukhipha ama-valve e-flapper noma ama-disc valves. Owokuqala kulula ukuwuhogela ngaphandle komoya ngenxa yokungasebenzi kahle kokuvala, kanti lokhu kwakamuva kulula ukugcina izinto futhi kubangele ukulahleka kwama-reactants. Ngakho-ke, lezi zinkinga kufanele zixazululwe ngayinye ngayinye.

Abacwaningi baye bathuthukisa idizayini ye-colter reactor izikhathi eziningi, futhi bayinikeza amabhizinisi amaningana e-cellulose ether ukuze isetshenziswe isilingo, futhi kancane kancane bathuthukisa umklamo ngokuya ngempendulo. Ngokushintsha ukwakheka kwesakhiwo samakhola kanye nokuhlelwa okuntengantengayo kwamakholatha amabili asondelene nhlangothi zombili ze-shaft eyinhloko, ama-reactants ngaphansi kwesenzo sama-coulter awagcini nje ngokuba nesiphithiphithi eziqondisweni eziyindilinga kanye ne-radial eduze kodonga lwangaphakathi lwesilinda, kodwa Futhi Splash ngendlela evamile yezinhlangothi zombili ze-colter, ukuze ama-reactants axutshwe ngokugcwele, futhi ukusabela kwe-alkalization kanye ne-etherification okuqediwe kunqubo yokuxuba kuphelele, izinga lokusebenzisa ama-reactants liphezulu, isivinini sokuphendula siyashesha futhi ukusetshenziswa kwamandla kuphansi. Ngaphezu kwalokho, izigxivizo ze-shaft kanye nezihlalo ezithwala kuzo zombili iziphetho zesilinda zigxilwe epuleti lokugcina labakaki ngokusebenzisa i-flange ukuze kwandiswe ukuqina kwe-shaft eyinhloko, ngakho-ke ukusebenza kuzinzile. Ngesikhathi esifanayo, umphumela wokuvala uphawu lwe-shaft ungaqinisekiswa ngoba i-shaft eyinhloko ayigobi futhi ikhubazekile, futhi i-powder ku-cylinder ayiphunyuki. Ngokushintsha ukwakheka kwe-valve yokukhipha nokwandisa ububanzi bethangi lokukhipha umoya, akukwazi nje ukuvimbela ngokuphumelelayo ukugcinwa kwezinto ku-valve yokukhipha, kodwa futhi kuvimbele ukulahlekelwa kwe-powder yezinto ngesikhathi sokukhipha, ngaleyo ndlela kunciphise ngempumelelo ukulahlekelwa kokusabela. imikhiqizo. Isakhiwo se-reactor entsha sinengqondo. Ngeke nje inikeze indawo ezinzile futhi enokwethenjelwa yokulungiselela i-cellulose ether CMC, kodwa futhi ivimbele ngokuphumelelayo i-powder ku-cylinder ekuphunyukeni ngokuthuthukisa umoya we-shaft seal kanye ne-valve yokukhipha. Ivumelana nemvelo, iqaphela umbono wokuklama wemboni yamakhemikhali aluhlaza.

2.3 Ukuthuthukiswa kwe-colter reactor

Ngenxa yokukhubazeka kwama-kneader amancane, aphansi, nampofu, i-colter reactor ingene ezindaweni eziningi zokukhiqiza ze-CMC zasekhaya, futhi imikhiqizo ihlanganisa amamodeli ayisithupha angu-4m.³ngi, 6m³ngi ,8m³, 10m³awu ,15m³awu ,26m³. Ngo-2007, i-colter reactor yawina ukugunyazwa kwelungelo lobunikazi lemodeli ye-Utility kazwelonke (inombolo yokushicilela yelungelo lobunikazi: CN200957344). Ngemuva kuka-2007, ireactor ekhethekile yolayini wokukhiqiza we-ether we-non-ionic cellulose (njenge-MC/HPMC) yasungulwa. Njengamanje, ukukhiqizwa kwasekhaya kwe-CMC kusebenzisa indlela yokuncibilikisa.

Ngokwempendulo yamanje evela kubakhiqizi be-cellulose ether, ukusetshenziswa kwama-colter reactors kunganciphisa ukusetshenziswa kwe-solvent ngo-20% kuya ku-30%, futhi ngokwanda kwemishini yokukhiqiza, kunethuba lokwehliswa okuqhubekayo kokusetshenziswa kwe-solvent. Njengoba i-colter reactor ingafinyelela ku-15-26m³, ukufana kokusatshalaliswa kwe-substitute ekuphenduleni kwe-etherification kungcono kakhulu kunokwe-kneader.

3. Ezinye izinto zokukhiqiza ze-cellulose ether

Eminyakeni yakamuva, ngenkathi kwakhiwa i-cellulose ether alkalization kanye namareactor e-etherification, amanye amamodeli ahlukile nawo asathuthukiswa.

Isiphakamisi somoya (inombolo yokushicilela yelungelo lobunikazi: CN200955897). Enqubweni yokukhiqiza ye-CMC ye-solvent, umshini wokomisa i-rake vacuum wawusetshenziswa kakhulukazi ekubuyiseleni isincibilikisi kanye nenqubo yokomisa esikhathini esedlule, kodwa umshini wokomisa i-rake vacuum ungasebenza kuphela ngezikhathi ezithile, kuyilapho isiphakamisi somoya singabona ukusebenza okuqhubekayo. Isiphakamisi somoya sichoboza izinto ze-CMC ngokuzungezisa ngokushesha ama-coulters nemibese endizayo kusilinda ukuze kwandiswe indawo yokudlulisa ukushisa, futhi sifafaze isitimu kusilinda ukuze sivuthulule ngokuphelele i-ethanol entweni ye-CMC futhi yenze lula ukululama, ngaleyo ndlela Yehlisa izindleko zokukhiqiza CMC futhi ulondoloze izinsiza ze-ethanol, futhi uqedele ukusebenza kwenqubo yokomisa i-cellulose ether ngesikhathi esifanayo. Umkhiqizo unamamodeli amabili angu-6.2m³futhi 8m³.

I-Granulator (inombolo yokushicilela yelungelo lobunikazi: CN200957347). Enqubweni yokukhiqiza i-cellulose ether ngendlela ye-solvent, i-twin-screw extrusion granulator yayisetshenziswa kakhulu esikhathini esidlule ukuze kuncishiswe i-sodium carboxymethyl cellulose impahla ngemva kokusabela kwe-etherification, ukuwashwa nokomiswa. I-ZLH yohlobo lwe-cellulose ether granulator ayikwazi nje ukugoqa ngokuqhubekayo njenge-twin-screw extrusion granulator ekhona, kodwa futhi ingasusa ngokuqhubekayo izinto ngokufaka umoya kusilinda kanye namanzi okupholisa ejazini. Iphendula ukushisa kwemfucuza, ngaleyo ndlela ithuthukise ikhwalithi yegranulation, futhi yonge ugesi, futhi ingakhuphula izinga lokuphuma komkhiqizo ngokukhuphula isivinini sokuphotha, futhi ingalungisa ukuphakama kwezinga lempahla ngokuya ngezidingo zenqubo. Umkhiqizo unamamodeli amabili we-3.2m³kanye 4m³.

I-Airflow mixer (inombolo yokushicilela yelungelo lobunikazi: CN200939372). Isihlanganisi sokugeleza komoya sohlobo lwe-MQH sithumela umoya ocindezelwe egumbini lokuxuba ngombhobho osekhanda elixutshwayo, futhi okubalulekile kukhuphuka ngokuzungeza odongeni lwesilinda ngomoya ocindezelwe ukuze kwakheke isimo sokuxutshwa samanzi. Ngemuva kokushaywa kwe-pulse kanye nezikhawu zokumisa isikhashana, Ukuxubana okusheshayo nokufana kwempahla ngevolumu egcwele kungabonakala. Umehluko phakathi kwamaqoqo ahlukene omkhiqizo uhlanganiswa ngokuhlanganisa. Njengamanje, kunezinhlobo ezinhlanu zemikhiqizo: 15m³awu ,30m³awu ,50m³awu ,80m³, futhi 100m³.

Nakuba igebe phakathi kwemishini yokukhiqiza i-cellulose ether yezwe lami kanye namazinga athuthukile angaphandle liyancishiswa nakakhulu, kusadingeka ukuthi kuqhutshekwe kuthuthukiswe izinga lenqubo futhi kwenziwe intuthuko eyengeziwe ukuze kubhekwane nezinkinga ezingahambelani nemishini yokukhiqiza yamanje.

4. I-Outlook

imboni yezwe lami i-cellulose ether ithuthukisa ukwakheka nokucubungula kwemishini emisha, futhi ihlanganisa izici zemishini ukuze ithuthukise inqubo ngokuqhubekayo. Abakhiqizi nabakhiqizi bemishini sebeqalile ukuthuthukisa ngokubambisana nokusebenzisa amathuluzi amasha. Konke lokhu kubonisa inqubekelaphambili yomkhakha wezwe lami we-cellulose ether. , lesi sixhumanisi sizoba nomthelela obalulekile ekuthuthukisweni kwemboni. Eminyakeni yamuva, imboni yezwe lami ye-cellulose ether, esekelwe kubuchwepheshe obunezici zesiShayina, iye yathatha isipiliyoni esithuthukisiwe samazwe ngamazwe, yethula amadivaysi angaphandle, noma yasebenzisa ngokugcwele imishini yasekhaya ukuze iqedele ukuguqulwa koqobo "okungcolile, okungcolile, okumpofu" kanye nokukhiqizwa kweshabhu yokucobelelana ngolwazi edinga abasebenzi abaningi ukuya Uguquko lwemishini kanye nezishintshayo ukuze kuzuzwe ukukhuphuka okukhulu kwamandla okukhiqiza, ikhwalithi nokusebenza kahle embonini ye-cellulose ether sekube yinhloso evamile yabakhiqizi bezwe lami be-cellulose ether.