rongo

polyethylene kiato iti (LDPE)he polymerized ethylene rite te monomer polymerization, peroxide rite te initiator, te kapia thermoplastic whiwhi i te tauhohenga polymerization radical free, te taimaha rāpoi te tikanga i roto i 100000~500000, te kiato ko 0.91~0.93g/cm3, ko te momo mama o te polyethylene resin .

He pai te ngawari, te whakaroa, te whakamaarama hiko, te maamaatanga, te ngawari o te tukatuka me etahi waahanga hau.He pai te matū matū, te ātete alkali, te ātete ki ngā whakarewa pararopi whānui, he maha ngā whakamahinga, tae atu ki te paninga extrusion, te kiriata pupuhi, te waea me te whakakikorua taura, te werohanga me te pupuhi mo te hanga hollow, etc.

Na te poto o te ora o nga rauropi kore utu e hangaia ana e te kaitaunaki, ka tino whakakopahia te ethylene ma te whakanui ake i te pehanga tauhohenga (110 ~ 350MPa), kia piki ake ai tona kiato ki te 0.5g/cm3, he rite ki te wai e kore e taea. kia kōpeketia ano.Hei whakapoto i te mokowhiti ngota ethylene me te whakanui ake i te tukinga i waenga i nga rauropi kore utu me nga mekameka tipu kaha me nga ngota ngota ethylene, ka mahia te tauhohenga polymerization tuwhena koreutu.Ka hangaia te polyethylene iti kiato, no reira ka kiia hoki te polyethylene kiato iti te pehanga teitei te polyethylene iti.

Te tukanga whakaputa polyethylene iti

Ko te tukanga whakaputa o te polyethylene kiato iti te nuinga kei roto ethylene rua-wahanga kōpeketanga, initiator me regulator werohia, pūnaha tauhohenga polymerization, teitei me te iti pēhanga wehenga me te pūnaha whakaora, granulation Tangohanga me te pūnaha pou-maimoatanga, etc.

E ai ki nga momo momo reactor, ka taea te wehewehe ki nga momo e rua: te tikanga ngongo pehanga teitei me te tikanga autoclave.

Ko te tukanga tubular me te tukanga kettle he o ratou ake ahuatanga: he hanganga ngawari te hangahanga tubular, he watea te hanga me te tiaki, a ka kaha ki te tu atu i te pehanga teitei;He uaua te hanganga o te reactor, he uaua te tiaki me te whakaurunga.I te wa ano, he iti te rahi o te reactor na te iti o te kaha ki te tango wera.

I te nuinga o te korero, ka whakamahia te tikanga ngongo mo nga whakaurunga nui-nui, ka whakamahia te tikanga kettle mo nga whakaurunga e whakaputa ana i nga hua taapiri-nui penei i te EVA o te karaehe motuhake me te ihirangi teitei o te vinyl acetate.

Na nga ahuatanga o nga tikanga rereke, he maha ake nga mekameka o te tikanga kettle me te pai ake o te kaha o te paanga, e tika ana mo te whakakore i te kapia paninga.Ko te tikanga ngongo he whanui te tohatoha o te taumaha ngota, he iti iho te mekameka me te taonga whatu pai, he pai mo te tukatuka ki nga kiriata kikokore.

Tikanga ngongo pehanga teitei te hangarau hanga polyethylene iti kiato

Ko te diameter o roto o te reactor tubular ko te tikanga 25 ~ 82mm, ko te roa ko te 0.5 ~ 1.5km, he nui ake te waahanga o te 10000:1, ko te diameter o waho ki te diameter o roto ko te tikanga kaore i te iti iho i te 2mm, me te koti wai he whakamahia hei tango i tetahi wahanga o te wera tauhohenga.

I tenei wa, ko te putorino he rite tonu te tikanga ki te tukatuka i te rere taketake, te tangohanga o nga momo kai reactor rereke, rereke rereke te taumaha o te ngota, te kaiwhakarewa me tona waahi werohanga, me nga huarahi rereke mo te werohanga tongi, te tukatuka hua, te nui o te hokinga mai ethylene me te tuku i te tuunga, kua hanga i nga ahuatanga rereke o te tukanga.

I tenei wa, kei roto i te hangarau tukanga tubular pakeke te tukanga Lupotech T a LyondellBasell, te tukanga tubular a Exxon Mobil me te tukanga CTR a DSM.

Lupotech T tukanga

Ko te tukanga LyondellBasell Lupotech T e whakamahia ana mo te 60% o te kaha hanga whare o nga tipu polyethylene iti.Ko te pēhanga tauhohenga 260 ~ 310MPa, tauhohenga pāmahana 160 ~ 330 ℃, kotahi-ara auau faafariuraa o 35%, kiato hua 0.915 ~ 0.935g / cm3, taupū rewa 0.15 ~ 50g / 10min, raina kotahi kaha production 45× 104T / A, Ko te tukanga e rima nga ahuatanga hangarau:

(1) Ka whakamahia te hangarau reactor Pulse ki te mohio ki te whakatuwheratanga o te reactor, te roanga o te whakatuwheratanga o te reactor me te huringa huringa i te mutunga o te reactor.Ka taea e te mahi Pulse te whakapai ake i te paanga o te whakaranu i roto i te reactor, te pai o te tauhohenga o te tauhohenga, te tere o te huringa, te whakaiti i te taapiri o te pakitara reactor, te whakapai ake i te whakarea o te wera, me te pai ake o te tango i te wera o te wai koti;

(2) I werohia nga peroxides ki nga waahi rereke o te reactor i nga waahi e wha hei hanga i nga waahanga e wha o te rohe tauhohenga;

(3) Me te propylene, te propanaldehyde hei kaiwhakahaere taumaha molecular, i whakauruhia e te kokoru compressor, me te ethylene ki roto i te reactor, te whānuitanga o nga hua;

(4) Ka taea e te punaha hau tohanga teitei te mahi horoi-whaiaro, te whakakore me te atuaxing na roto i te whakahaere raupapa, te whakaiti i te paanga ki nga mahi whakaputa noa;

(5) Whakaritehia te punaha teihana wai wera ki te whakaiti i te kai o te wai whakamatao, me te whakaora i te wera o te tauhohenga polymerization me te punaha hau tohanga teitei mo etahi atu taputapu.

He tukanga tubular Exxon Mobil

Ko te pehanga tauhohenga o te tukanga ngongo Exxon Mobil ko 250 ~ 310MPa, ko te pāmahana tauhohenga ko 215 ~ 310 ℃, ko te tere o te huringa ki te 40%, ko te kiato hua ko 0.918 ~ 0.934g / cm3, ko te taupae rewa ko 0.2 ~ 50g / (10min), me te kaha whakaputa raina kotahi ko 50 × 104T / A.Ko te tukanga e ono nga ahuatanga hangarau:

(1) Ka tangohia te reactor ngongo rere pana whakapae, a ka whakawhānuihia te diameter o te reactor i te taahiraa i runga i te ahunga axial ki te arotau i te tere o te rere hau me te heke o te pehanga reactor.Whakanuia te pumau o te tauhohenga, whakaitihia te tauhohenga pirau, whakaitihia te tauine i roto i te reactor, whakapai ake i te pai o te whakawhiti wera o te reactor;

(2) Ka werohia te kaitaunaki i te taha o te axial o te reactor, ka taea te hanga i te 4 ~ 6 nga waahanga tauhohenga, te whakapai ake i te tere o te huringa me te ngawari o te whakahaere, me te whānuitanga o nga hua;

(3) Ko te tikanga whakamahi propylene hei kaiwhakahaere ki te whakahaere i te taupae rewa, te hanga o nga hua reo-kiato ma te whakamahi i te propanaldehyde hei kaiwhakahaere, te kaiwhakahaere na roto i te papu diaphragm pehanga teitei ka werohia ki te kokoru compressor rua, katahi me te ethylene ki roto i te reactor;

(4) te whakamahi i te reactor tubular wera o te ethylene vinyl kai whakamua me te whakakotahitanga whangai multipoint makariri o te taha taha, te tuku wera rite, a ka whai hua ano pea ki te tango i te wera o te tauhohenga, ko te reactor te whakapai ake i te kawenga whakamahana koti, whakaitihia te roa o te reactor. , me te hanga i te tohatoha pāmahana reactor i roto i te maeneene, te whakapai ake i te tere hurihanga ethylene.I te wa ano, na te maha o nga kai taha taha, ka whakahekehia te nui o te kai ethylene wera whakamua o te reactor, ka whakahekehia te kawenga wera o te reactor inlet preheater, ka whakahekehia te kai o te pehanga teitei me te pehanga reo.

(5) Ka whakamahia te punaha wai whakahaere i te pāmahana kati hei tuku wai ki te koti reactor hei tango i te wera tauhohenga.Na roto i te arotau i te pāmahana tuku wai o te wai koti, ka pai ake te pai o te whakawhiti wera, ka poto te roa o te reactor, ka piki ake te tere o te huringa;

(6) Te whakaora me te whakamahi i te pehanga teitei me te kaha o te wera wera nui i tukuna mai i te tihi o te wehenga teitei.

Te tukanga CTR

DSM CTR tukanga pēhanga tauhohenga ko 200 ~ 250MPa, tauhohenga pāmahana ko 160 ~ 290 ℃, auau faafariuraa ko 28% ~ 33.1%, te mōrahi taea tae 38%, kiato hua ko 0.919 ~ 0.928g / cm3, taupū rewa ko 0.3 ~ 65g / (10min), Ko te nui o te kaha waea kotahi ka tae ki te 40 × 104T / A.E rima nga ahuatanga hangarau o te tukanga:

(1) Ma te whakamahi i nga mahi kore-pure, he iti te pehanga whakahaere reactor me te mau tonu, he nui te rere o te rere i roto i te reactor, he pai te whiu, kaore e puta te ahua o te pakitara, kaore e hiahiatia e te reactor te horoi me te whakaheke, me te whakaiti i te utu mahi;

(2) Ko te diameter o te putorino reactor e mau tonu ana, ko te kaupapa tika "kotahi-paahi" ka tangohia, kaore he punaha whangai raina taha uaua, he maamaa te reactor me te hoahoa tautoko, he iti ake te haumi;

(3) ka whakamataohia te koti reactor e te wai matao, ka taea te whakaputa mamaoa ma te hua;

(4) Ko te whakamahi o te peroxide initiator, he iti te hanganga o te ra, kaore he toenga whakakorikori, he pai te painga o te tiaki taiao;He iti ake nga oligomer i hangaia, a ka ngawari te mahi hangarua o te hau tohanga.

(5) Ko nga tikanga whakahaere pai me te kore he rereke o te pehanga i te wa o te polymerization ka hanga i nga hua o te kounga teitei, ina koa ko nga hua kiriata, me nga taonga whakaata pai me nga taonga tukatuka, ka taea te whakaputa i te matotoru kiriata iti o nga hua kiriata 10μm, engari he whaiti te awhe hua, e kore e taea te whakaputa hua copolymer (EVA) he iti te taupū rewa.

Hangarau hanga o te polyethylene iti kiato ma te tikanga autoclave

Ko te tukanga autoclave e whakamahi ana i te reactor tank me te punaha whakaoho, ka taea te ahua o te waahanga mai i te 2: 1 ki te 20: 1, ko te 0.75 ~ 3m3 te rahinga reactor tank.Ko te tikanga te pāmahana tauhohenga 150 ~ 300 ℃, te pēhanga tauhohenga ko te tikanga 130 ~ 200MPa, te auau faafariuraa ko 15% ~ 21%.

I te mea he oko taiapa matotoru te ketere, ko te whakawhiti wera i roto i te pakitara reactor he iti ake i te reactor ngongo, no reira he tukanga adiabatic te tauhohenga, a kaore he wera e kitea mai i te reactor.Ko te pāmahana tauhohenga te nuinga e whakahaerehia ana e te werohanga ira-maha o te kai ethylene matao hei taurite i te wera tauhohenga.Ko te reactor he mea whakakorikori motika hei hanga i te ranunga ki te kakahu reactor me te karo i nga waahi wera o te rohe.Ko te kaitakawaenga he peroxide waro, ka taea te werohia ki nga waahi rereke i te taha o te ahunga axial o te reactor ki te hanga i nga waahanga tauhohenga maha me nga pāmahana whakahaere rereke.Karekau he whakakotahitanga i waenga i nga waahanga tauhohenga, mahi ngawari me te whānuitanga o nga hua hua, ka taea te whakaputa i te EVA copolymerized tae atu ki te 40% te ihirangi vinyl acetate.

Lupotech He tukanga

Lupotech He tukanga whakamahi He reactor tank whakaohooho, ko te rōrahi reactor he 1.2m3, ka werohia nga rauemi mata me te kaitakawaenga ki roto i te reactor e nga tohu maha, ko te pehanga tauhohenga ko 210 ~ 246MPa, ko te teitei o te tauhohenga tauhohenga ko te 285 ℃, te kaiwhakahaere he propylene ranei propane, tāpirihia e te kōkuhu kōpeke tuarua, ka taea te whakaputa He momo momo hua LDPE / EVA, Ko te kiato hua ko 0.912 ~ 0.951g / cm3, ko te taupae whakarewa ko 0.2 ~ 800g / (10min), ka taea te piki ake te ihirangi o te vinyl acetate. ki te 40%, ko te 10% ~ 21% te tere o te hurihanga kotahi-ara, ka taea e te tauine hoahoa raina kotahi te eke ki te 12.5x104t/a.

Kaore e taea e te tukanga LupotechA te whakaputa noa i te kapia whakakikoruatia me te mekameka nui ake me te pai ake o te paanga, engari ka whakaputa ano hoki i nga hua kiriata angiangi me te tohatoha taumaha irapoi.Ko te tohu rewa me te kiato o nga hua LDPE / EVA ka taea te whakahaere pai e te punaha whakahaere APC, a ka taea te whiwhi hua rite.Ko te whakaurunga matua o tenei mahi ko te Sirbon petrochemical, Yangzi petrochemical, Shanghai petrochemical, me etahi atu, ko te kaha o te taputapu ko 10 × 104T / a.

Te tukanga kettle Exxon Mobil

Ko te tukanga taika Exxon Mobil he tango i tetahi reactor taika 1.5m3 i hangaia e ia ano.He nui ake te ahua o te reactor, he roa te wa pupuri, teitei ake te pai o te kaikokiri me te whaiti o te tohatoha ira rapoi hua, e pai ana ki te hanga hua kiriata angiangi he rite te kounga ki te tukanga ngongo.

He rereke te kaiwhakahaere i te tikanga ngongo Exxon Mobil.Ka whakamahia te Isobutene, te n-butane ranei, ka whakanuia ki te 25~30MPa na roto i te papu diaphragm pehanga teitei, ka werohia kia rua nga wa i te kokoru compressor, ka uru ki te reactor me te ethylene.

He whanui te awhe pehanga reactor, a ko te 200MPa te pehanga tauhohenga teitei, ka taea te whakaputa i te homopolymer LDPE me te tohu whakarewa iti me te EVA copolymer me te ihirangi vinyl acetate teitei.

Ka taea e te tukanga tank Exxon Mobil te whakaputa i nga hua homopolymer LDPE me te tohu rewa o 0.2 ~ 150g / (10min) me te kiato o 0.910 ~ 0.935g / cm3.Ko te tohu rewa 0.2 ~ 450g / (10min) te ihirangi vinyl acetate ki runga ki te 35% ethylene - hua vinyl acetate copolymer (EVA).Ko te whakaurunga matua o tenei mahi ko Lianhong Group (ko Shandong Hauda i mua), ko te kaha o te taputapu ko 10× 104T /a, TRINA, ko te kaha o te taputapu ko 12× 104T /a, etc.