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Cufnaanta hoose ee polyetylen (LDPE)waa ethylene polymerized sida monomer polymerization, peroxide sida bilawga, resin thermoplastic oo laga helay falcelinta polymerization ee bilaashka ah, miisaanka kelli guud ahaan waa 100000 ~ 500000, cufnaanta waa 0.91 ~ 0.93g / cm3, waa noocyada ugu fudud ee resin polyetylen. .

Waxay leedahay jilicsanaan wanaagsan, koronto, dahaarka korantada, daah-furnaanta, habaynta sahlan iyo xajinta hawada qaarkood.Degganaanshiyaha kiimikada wanaagsan, caabbinta alkali, iska caabinta dareerayaasha guud ee organic, waxay leedahay adeegsiyo badan oo kala duwan, oo ay ku jiraan daahan extrusion, filim afuufaya, daahan xadhig iyo fiilada, qaabaynta irbado iyo dharbaaxo qaabaynta qaabaynta godan, iwm.

Sababtoo ah nolosha gaaban ee xagjirnimada xorta ah ee uu soo saaro bilawga, ethylene si weyn ayaa loo cadaadiyaa iyada oo la kordhinayo cadaadiska falcelinta (110 ~ 350MPa), si cufnaanta loo kordhiyo 0.5g / cm3, taas oo la mid ah dareeraha aan awoodin. mar kale la cadaadiyo.Si loo gaabiyo molecular ethylene oo loo kordhiyo ixtimaalka isku dhaca u dhexeeya xagjirka xorta ah ama silsiladaha firfircoon ee koraya iyo molecules ethylene, falcelinta polymerization-ka bilaashka ah ayaa la sameeyaa.Polyethylene cufnaanta hoose ayaa la soo saaraa, sidaas darteed cufnaanta hoose ee polyetylen waxaa sidoo kale loo yaqaannaa cadaadiska sare ee cufnaanta hoose ee polyetylen.

Cufnaanta hoose ee polyetylen habka wax soo saarka

Habka wax soo saarka ee cufnaanta hoose ee polyetylen inta badan waxaa ka mid ah ethylene laba-marxalad cadaadis, initiator iyo regulator duritaanka, nidaamka falcelinta polymerization, sare iyo hooseeyo cadaadis kala soocidda iyo nidaamka soo kabashada, granulation extrusion iyo nidaamka daaweynta ka dib, iwm.

Marka loo eego noocyada kala duwan ee reactor, waxa loo qaybin karaa laba nooc: Habka tuubada cadaadiska sare iyo habka autoclave.

Habka tubbada iyo geeddi-socodka kettle waxay leeyihiin sifooyin iyaga u gaar ah: reactor tubular wuxuu leeyahay qaab-dhismeed fudud, soo-saar ku habboon iyo dayactir, wuxuuna u adkeysan karaa cadaadis sare;Qaab dhismeedka reactor-ku wuu adag yahay, dayactirka iyo rakibiddana waa ay adag tahay.Isla mar ahaantaana, mugga reactor caadi ahaan waa yar yahay sababtoo ah awoodda saarista kuleylka xaddidan.

Guud ahaan, habka tuubada waxaa loo isticmaalaa rakibaadyo baaxad leh, halka habka kiliga loo isticmaalo rakibaadda soo saarista alaabada qiimaha sare leh sida EVA ee darajada gaarka ah iyo content sare ee vinyl acetate.

Sababtoo ah sifooyinka hababka kala duwan, habka kettle wuxuu leeyahay silsilado badan oo laamo ah iyo xoog saameyn wanaagsan leh, kaas oo ku habboon soo saarista resin dahaarka.Habka tubbada ayaa leh qaybinta miisaanka kellika ah ee ballaaran, silsilad yar oo laamood ah iyo hanti muuqaal ah oo wanaagsan, taas oo ku habboon in lagu farsameeyo filimada khafiifka ah.

Habka tuubada cadaadiska sare ee cufnaanta hoose ee tignoolajiyada wax soo saarka ee polyetylen

Dhexroorka gudaha ee reactor tubular guud ahaan waa 25 ~ 82mm, dhererka waa 0.5 ~ 1.5km, saamiga dhinaca waa ka weyn yahay 10000: 1, dhexroor dibadda in ratio dhexroor gudaha guud ahaan waa wax aan ka yarayn 2mm, iyo jaakada biyaha waa loo isticmaalo in lagu saaro qayb ka mid ah kulaylka falcelinta.

Ilaa hadda, biibiile waa qiyaastii hab la mid ah si loo farsameeyo socodka aasaasiga ah, korsashada ee dhibic feed reactor kala duwan, kala duwan ee miisaanka kelli, initiator iyo meesha ay duritaanka, iyo siyaabo kala duwan oo irbado bacriminta, processing alaabta, qadarka soo celinta ethylene oo soo dirtaa booska, waxay samaysay qaababka kala duwan ee habka.

Waqtigan xaadirka ah, tignoolajiyada geeddi-socodka tubbada qaan-gaarka ah inta badan waxaa ka mid ah habka LyondellBasell ee Lupotech T, geeddi-socodka tubbada ee Exxon Mobil iyo habka CTR ee DSM.

Nidaamka Lupotech T

Habka LyondellBasell Lupotech T waxaa loo isticmaalaa qiyaastii 60% awoodda wax soo saarka gudaha ee dhirta polyetylen cufnaanta hoose.Cadaadiska falcelinta 260 ~ 310MPa, heerkulka falcelinta 160 ~ 330 ℃, heerka beddelka hal-hab ee 35%, cufnaanta alaabta 0.915 ~ 0.935g / cm3, index dhalaalka 0.15 ~ 50g / 10min, awoodda wax soo saarka hal line 45 × 104T / A, geeddi-socodku wuxuu leeyahay shan astaamood oo farsamo:

(1) Farsamada reactor-ka garaaca wadnaha ayaa la qaatay si loo xaqiijiyo furitaanka waalka, mudada furitaanka waalka iyo inta jeer ee beddelka dhamaadka reactor-ka.Hawlgalka garaaca wadnaha ayaa hagaajin kara saamaynta isku-dhafka ah ee reactor-ka, xasilloonida falcelinta wanaagsan, heerka beddelka sare, hoos u dhigista darbiga reactor, hagaajinta isku-dhafka kulaylka, iyo saameynta kuleylka wanaagsan ee biyaha jaakada;

(2) Peroxides ayaa lagu duray meelo kala duwan oo reactor ah afar dhibcood si ay u sameeyaan afar qaybood oo aagga falcelinta;

(3) Iyada oo leh propylene, propanaldehyde sida xakamaynta miisaanka molecular, oo ay soo bandhigtay gudaha kombaresarada, oo leh ethylene galay reactor, kala duwanaansho alaabooyin ballaaran;

(4) Nidaamka gaaska wareega ee cadaadiska sarreeya wuxuu ogaan karaa is-nadiifinta, kala dirida iyo qalliinka ka saarista iyada oo loo marayo xakamaynta isdaba-joogga ah, yaraynta saameynta hawlaha caadiga ah ee wax soo saarka;

(5) Deji nidaamka saldhigga biyaha kulul si loo yareeyo isticmaalka biyaha qaboojinta, iyo soo kabashada kulaylka falcelinta polymerization iyo nidaamka gaaska wareega wareegga cadaadiska sare ee qalabka kale.

Habka tubular ee Exxon Mobil

Cadaadiska falcelinta ee habka tube Exxon Mobil waa 250 ~ 310MPa, heerkulka falcelinta waa 215 ~ 310 ℃, heerka beddelka waa ilaa 40%, cufnaanta wax soo saarka waa 0.918 ~ 0.934g / cm3, index dhalaali waa 0.2 ~ 50g / (10min), iyo awoodda wax soo saarka hal xariiqa waa 50 × 104T/A.Nidaamku wuxuu leeyahay lix astaamood oo farsamo:

(1) Reactor tubbada qulqulka qulqulka tooska ah ayaa la qaatay, dhexroorka reactor-ka ayaa la ballaariyay tallaabo tallaabo iyadoo la raacayo jihada axial si loo wanaajiyo heerka socodka gaaska iyo hoos u dhaca cadaadiska reactor.Kordhi xasiloonida falcelinta, yarayso falcelinta burburka, hoos u dhig miisaanka gudaha reactor-ka, hagaajinta waxtarka wareejinta kulaylka ee reactor;

(2) Bilawga waxaa lagu duraa jihada axial ee reactor, kaas oo samayn kara 4 ~ 6 aagagga falcelinta, hagaajinta heerka beddelka iyo dabacsanaanta hawlgalka, iyo kala duwanaanta alaabta ballaaran;

(3) Guud ahaan u isticmaal propylene sidii nidaamiye si aad u xakamayso tusmada dhalaalka, soosaarka alaabada cufnaanta dhexdhexaadka ah iyadoo la isticmaalayo propanaldehyde sida nidaamiye, nidaamiye iyada oo loo marayo bamka cadaadiska sare ee diaphragm lagu muday gudaha kombaresarada laba jeer, ka dibna leh ethylene galay reactor;

(4) iyadoo la isticmaalayo reactor tube kulul ee ethylene vinyl hore feed iyo qabow multipoint quudinta isku darka lateral, sii daayo kulaylka uniform iyo sidoo kale laga yaabaa in ay saameyn ka saarida kulaylka ee falcelinta, reactor optimized load qaboojinta jacketed, yareeyo dhererka reactor. , oo ka dhig qaybinta heerkulka reactor si siman, hagaajin heerka beddelka ethylene.Isla mar ahaantaana, ay sabab u tahay feed lateral multi-dhibcood, tirada feed ethylene kulul hore ee reactor waa la dhimay, culayska kulaylka ee preheater inlet reactor waa la dhimay, iyo isticmaalka cadaadiska sare iyo uumiga cadaadis dhexdhexaad ah waa la dhimay.

(5) Nidaamka biyaha ee habeeya heerkulka xiran waxaa loo isticmaalaa in lagu siiyo biyaha jaakada reactor si meesha looga saaro kulaylka falcelinta.Iyada oo la hagaajinayo heerkulka sahayda biyaha ee biyaha jaakada, waxtarka wareejinta kulaylka ayaa la wanaajiyay, dhererka reactor waa la gaabiyey, heerka beddelka ayaa kordhay;

(6) Soo kabashada iyo ka faa'iidaysiga cadaadiska sare iyo tamarta dareeraha kulaylka sarreeya ee laga soo saaro dusha sare ee kala-soocida cadaadiska sare.

Habka CTR

Cadaadiska habka DSM CTR waa 200 ~ 250MPa, heerkulka falcelinta waa 160 ~ 290 ℃, heerka beddelka waa 28% ~ 33.1%, ugu badnaan wuxuu gaari karaa 38%, cufnaanta alaabta waa 0.919 ~ 0.928g / cm3, index dhalaalid waa 0.3 ~ 65g / (10min), ugu badnaan awoodda hal siligu waxay gaari kartaa 40 × 104T/A.Nidaamku wuxuu leeyahay shan astaamood oo farsamo:

(1) Isticmaalka qalliinka aan garaaca wadnaha ahayn, cadaadiska hawlgalka reactor waa hooseeyaa oo si joogta ah u socda, heerka qulqulka reactor waa sarreeyaa, wuxuu leeyahay saameyn wanaagsan oo xoqid ah, ma soo saaro ifafaale derbi ku dheggan, reactor uma baahna nadiifinta iyo descaling. waxayna yaraynaysaa kharashka hawlgalka;

(2) Dhexroorka tuubada reactor ayaa si joogto ah loo hayaa, mabda'a tooska ah ee "hal-pass" ayaa la qaatay, ma jiro nidaam quudin dhinaca khadka ah, reactor iyo naqshadeynta taageerada ayaa fudud, maalgashiguna waa hooseeyaa;

(3) jaakadda reactor waxaa lagu qaboojiyaa biyo qabow, kuwaas oo soo saari kara uumiga badeecada;

(4) Isticmaalka bilawga peroxide, halabuurka jel alaabtu waa yar yahay, ma jiro hadhaaga kicinta, saamaynta ilaalinta deegaanka ayaa wanaagsan;Oligomers yar ayaa la sameeyay, iyo habka dib-u-warshadaynta ee gaaska wareega waa la fududeeyay.

(5) Xaalado shaqo oo wanaagsan oo aan lahayn isbeddel cadaadis ah inta lagu jiro polymerization ayaa ka dhigaya alaabta tayada sare leh, gaar ahaan alaabta filimka, oo leh sifooyin muuqaal ah oo aad u fiican iyo guryaha wax lagu farsameeyo, waxay soo saari karaan dhumucda filimka ugu yar ee 10μm alaabta filimka, laakiin kala duwanaanta alaabtu waa cidhiidhi. ma soo saari karo alaabada kopolymer (EVA) ee leh index dhalaal hooseeya.

Farsamada wax soo saarka ee cufnaanta hoose ee polyetylen iyadoo loo marayo habka autoclave

Habka autoclave wuxuu isticmaalaa reactor taangiga oo leh nidaam walaaqaya, saamiga dhinaca wuxuu noqon karaa 2: 1 ilaa 20: 1, mugga reactor taangiga waa 0.75 ~ 3m3.Heerkulka falcelinta guud ahaan waa 150 ~ 300 ℃, cadaadiska falcelinta guud ahaan waa 130 ~ 200MPa, heerka beddelka waa 15% ~ 21%.

Mar haddii reactor-ku uu yahay weel gidaar qaro weyn leh, kulaylka ku wareejinta darbiga reactor-ku wuu ka xaddidan yahay reactor-ka tubbada, markaa falcelintu asal ahaan waa habraac adiabatic ah, kulayl cadna lagama saaro reactor-ka.Heerkulka falcelinta waxaa inta badan gacanta ku haya duritaanka dhibco badan ee quudinta ethylene qabow si loo dheellitiro kulaylka falcelinta.Reactor-ku waxa uu ku qalabaysan yahay kicinta matoorka si uu isku dhafka ugu sameeyo labiska reactor loogana fogaado meelaha kulul ee deegaanka.Bilawiyuhu waa peroxide organic, kaas oo lagu duri karo meelo kala duwan oo ay weheliyaan jihada axial ee reactor si loo sameeyo qaybo badan oo falcelin ah oo leh heerkul hawlgal oo kala duwan.Ma jiraan wax dib-u-dhaqaajin ah oo u dhexeeya qaybaha falcelinta, hawlgal dabacsan iyo kala duwanaansho badeecadeed, taas oo soo saari karta kobolymerized EVA oo leh ilaa 40% vinyl acetate content.

Nidaamka Lupotech A

Nidaamka Lupotech A wuxuu isticmaalaa reactor taangiga walaaqay, mugga reactor waa 1.2m3, alaabta ceeriin iyo bilawga ayaa lagu duraa reactor-ka dhibco badan, cadaadiska falcelinta waa 210 ~ 246MPa, heerkulka falcelinta ugu sarreeya waa 285 ℃, nidaamiyaha waa propylene ama propane, oo lagu daray kombaresarada sare, waxay soo saari kartaa noocyo kala duwan oo LDPE / EVA ah, cufnaanta alaabadu waa 0.912 ~ 0.951g / cm3, index dhalaalid waa 0.2 ~ 800g / (10min), content of vinyl acetate wuxuu noqon karaa kor. ilaa 40%, heerka beddelka hal-jidka ee reactor waa 10% ~ 21%, ugu badnaan hal cabbir naqshadeynta hal xariiqa waxay gaari kartaa 12.5 × 104t / a.

Nidaamka LupotechA kaliya ma soo saari karo xabagta dahaarka leh ee silsilado badan oo saameyn wanaagsan leh, laakiin sidoo kale waxay soo saartaa alaabada filim khafiif ah oo leh qaybinta miisaanka kelli ee ballaaran.Tusmada dhalaalka iyo cufnaanta alaabta LDPE/EVA waxaa si fiican u xakameyn kara nidaamka xakamaynta APC, iyo alaabada labbiska ah ayaa la heli karaa.Soo bandhigida ugu weyn ee gudaha ee nidaamkan waa Sirbon petrochemical, Yangzi petrochemical, Shanghai petrochemical, iwm., awoodda qalabku waa 10 × 104T / a.

Habka Kettle Exxon Mobil

Habka taangiga ee Exxon Mobil waxa uu qaadanayaa reactor taangiga aag badan oo dhan 1.5m3 iskiis loo qorsheeyay.Reactor-ku wuxuu leeyahay saami weyn oo dhinac ah, waqti haynta dheer, hufnaanta bilawga sare iyo qaybinta miisaanka kelli ee alaabta cidhiidhi ah, kaas oo ku habboon soo saarista alaabada filim khafiif ah oo leh tayada la mid ah habka tuubada.

Nidaamiyaha ayaa ka duwan habka tuubada Exxon Mobil.Isobutene ama n-butane ayaa la isticmaalaa, kaas oo kor loogu qaaday 25 ~ 30MPa iyada oo loo marayo bamka cadaadiska sare ee diaphragm, oo lagu duray laba jeer gudaha kombaresarada, oo gasha reactor leh ethylene.

Kala duwanaanshaha cadaadiska reactor waa ballaaran, cadaadiska falcelinta ugu badanna waa 200MPa, kaas oo soo saari kara LDPE homopolymer oo leh index dhalaal hooseeya iyo EVA copolymer oo leh maaddo sare oo vinyl acetate ah.

Habka taangiga Exxon Mobil wuxuu soo saari karaa alaabada homopolymer ee LDPE oo leh index dhalaalid 0.2 ~ 150g / (10min) iyo cufnaanta 0.910 ~ 0.935g / cm3.Tusmada dhalaalaysa 0.2 ~ 450g/ (10min) vinyl acetate content ilaa 35% ethylene - vinyl acetate copolymer (EVA).Soo bandhigida ugu weyn ee gudaha ee nidaamkani waa kooxda Lianhong (oo hore u ahaan jirtay Shandong Hauda), awoodda qalabku waa 10 × 104T / a, TRINA, awoodda qalabku waa 12 × 104T / a, iwm.