ozi

Polyethylene dị obere (LDPE)bụ ethylene polymerized dị ka monomer polymerization, peroxide dị ka onye mmalite, resin thermoplastic enwetara site na mmeghachi omume polymerization n'efu, ịdị arọ nke molekụla na-adịkarị na 100000 ~ 500000, njupụta bụ 0.91 ~ 0.93g / cm3, bụ ụdị kachasị dị mfe nke resin polyethylene. .

Ọ nwere ezigbo nro, extensibility, mkpuchi eletriki, nghọta, nhazi dị mfe na ụfọdụ ikuku ikuku.Ezi chemical kwụsie ike, alkali iguzogide, iguzogide n'ozuzu organic solvents, nwere a dịgasị iche iche nke ojiji, gụnyere extrusion mkpuchi, ịfụ film, waya na cable mkpuchi, injection ịkpụzi na ịfụ ịkpụzi oghere ịkpụzi, wdg.

N'ihi ndụ dị mkpirikpi nke free radicals nke onye mmalite na-emepụta, ethylene na-agbakọta nke ọma site n'ịbawanye nrụgide mmeghachi omume (110 ~ 350MPa), nke mere na njupụta ya na-abawanye na 0.5g / cm3, nke yiri mmiri mmiri na-enweghị ike. a ga-akpakọkwa ọzọ.Iji mee ka oghere molekụla ethylene dị mkpụmkpụ ma mee ka ohere nke esemokwu dị n'etiti radicals free ma ọ bụ ụdọ na-eto eto na-arụ ọrụ na ụmụ irighiri ethylene, a na-eme mmeghachi omume polymerization n'efu.A na-emepụta polyethylene dị ala, ya mere, a na-akpọkwa polyethylene njupụta dị ala.

Usoro mmepụta polyethylene dị ala

Usoro mmepụta nke obere njupụta polyethylene na-agụnye mkpakọ abụọ nke ethylene, onye mmalite na nchịkwa nchịkwa, usoro mmeghachi omume polymerization, nkewa dị elu na nke dị ala na usoro mgbake, extrusion granulation na post-treatment system, wdg.

Dị ka ụdị reactor dị iche iche si dị, enwere ike kewaa ya ụzọ abụọ: usoro tube nrụgide na usoro autoclave.

Usoro tubular na usoro kettle nwere njirimara nke ha: onye na-arụ ọrụ tubular nwere usoro dị mfe, nrụpụta na mmezi dị mma, ma nwee ike iguzogide nrụgide dị elu;Ọdịdị nke reactor dị mgbagwoju anya, na mmezi na nrụnye siri ike.N'otu oge ahụ, olu nke reactor na-abụkarị obere n'ihi oke ike iwepụ okpomọkụ.

N'ikwu okwu n'ozuzu, a na-eji usoro tube maka nrụnye buru ibu, ebe a na-eji usoro kettle eme ihe maka nrụnye na-emepụta ngwaahịa dị elu dị ka EVA nke ọkwa pụrụ iche na nnukwu ọdịnaya nke vinyl acetate.

N'ihi njirimara nke usoro dị iche iche, usoro kettle nwere ọtụtụ eriri alaka na ike mmetụta ka mma, nke kwesịrị ekwesị maka extruding mkpuchi resin.The tube usoro nwere obosara molekụla arọ nkesa, obere branched yinye na ezigbo ngwa anya onwunwe, nke kwesịrị ekwesị maka nhazi n'ime mkpa fim.

High mgbali tube usoro obere njupụta polyethylene mmepụta technology

The n'ime dayameta nke tubular reactor bụ n'ozuzu 25 ~ 82mm, ogologo bụ 0.5 ~ 1.5km, akụkụ ruru bụ ukwuu karịa 10000: 1, elu dayameta ka n'ime dayameta ruru bụ n'ozuzu bụghị ihe na-erughị 2mm, na mmiri jaket bụ. eji wepụ akụkụ nke okpomọkụ mmeghachi omume.

Ka ọ dị ugbu a, ọkpọkọ bụ ihe dị ka otu usoro iji hazie ihe bụ isi eruba, nnabata nke dị iche iche reactor ndepụta ebe, dị iche iche molekụla arọ regulator, initiator na ya injection ọnọdụ, na ụzọ dị iche iche nke fatịlaịza injection, ngwaahịa nhazi, ego nke nloghachi. ethylene ma na-ezipụ ọnọdụ ahụ, emepụtawo atụmatụ dị iche iche nke usoro.

Ka ọ dị ugbu a, teknụzụ usoro tubular tozuru oke gụnyere usoro Lupotech T nke LyondellBasell, usoro tubular Exxon Mobil na usoro CTR nke DSM.

Lupotech T usoro

A na-eji usoro LyondellBasell Lupotech T maka ihe dịka 60% nke ikike mmepụta ụlọ nke osisi polyethylene dị ala.The mmeghachi omume nrụgide 260 ~ 310MPa, mmeghachi omume okpomọkụ 160 ~ 330 ℃, otu ụzọ ntụgharị ọnụego nke 35%, ngwaahịa njupụta 0.915 ~ 0.935g / cm3, agbaze index 0.15 ~ 50g / 10min, otu akara mmepụta ikike 45 × 104T / A, usoro ahụ nwere njirimara teknụzụ ise:

(1) A na-anakwere teknụzụ reactor Pulse iji ghọta oghere valvụ, oge oghere valvụ na ntụgharị ugboro na njedebe nke reactor.Ọrụ Pulse nwere ike imeziwanye mmetụta ngwakọta na reactor, nkwụsi ike mmeghachi omume dị mma, ọnụego mgbanwe dị elu, belata nchikota mgbidi reactor, melite ọnụọgụ nnyefe okpomọkụ, na mmetụta dị mma na-ewepụ okpomọkụ nke mmiri jaket;

(2) A na-agbanye peroxides n'ime mpaghara dị iche iche nke reactor na isi anọ iji mepụta akụkụ anọ nke mpaghara mmeghachi omume;

(3) Na propylene, propanaldehyde dị ka molekụla arọ regulator, ewepụtara site a compressor inlet, na ethylene n'ime reactor, obosara ngwaahịa nso;

(4) The elu-nrụgide ikesa gas usoro nwere ike na-aghọta onwe-ihicha, dissolving na dewaxing ọrụ site usoro akara, ibelata mmetụta na nkịtị mmepụta ọrụ;

(5) Hazie usoro ọdụ ụgbọ mmiri na-ekpo ọkụ iji belata oriri nke mmiri jụrụ oyi, ma nwetaghachi okpomọkụ nke mmeghachi omume polymerization na nnukwu nrụgide na-ekesa gas maka ngwaọrụ ndị ọzọ.

Exxon Mobil tubular usoro

The mmeghachi omume nrụgide nke Exxon Mobil tube usoro bụ 250 ~ 310MPa, mmeghachi omume okpomọkụ bụ 215 ~ 310 ℃, mgbanwe ọnụego bụ ruo 40%, ngwaahịa njupụta bụ 0.918 ~ 0.934g / cm3, na-agbaze index bụ 0.2 ~ 50g / (10min), na ikike mmepụta otu ahịrị bụ 50 × 104T / A.Usoro a nwere njirimara teknụzụ isii:

(1) The kehoraizin push eruba tube reactor na-nakweere, na dayameta nke reactor na-agbasawanye nzọụkwụ site nzọụkwụ tinyere axial direction ebuli gas eruba ọnụego na reactor mgbali dobe.Mee ka nkwụsi ike nke mmeghachi omume ahụ dịkwuo elu, belata mmeghachi omume reactor, belata ọnụ ọgụgụ n'ime reactor, melite arụmọrụ ọkụ ọkụ nke reactor;

(2) The initiator na-injected tinyere axial direction nke reactor, nke nwere ike na-etolite 4 ~ 6 mmeghachi omume zones, melite mgbanwe ọnụego na arụmọrụ mgbanwe, na obosara ngwaahịa nso;

(3) N'ozuzu, na-eji propylene dị ka onye na-achịkwa iji chịkwaa index na-agbaze, mmepụta nke ngwaahịa ndị na-ajụ ase na-eji propanaldehyde dị ka onye na-achịkwa, onye na-achịkwa site na nnukwu nrụgide diaphragm mgbapụta ịgbanye na ntinye compressor ugboro abụọ, wee jiri ethylene banye na reactor;

(4) na-eji na-ekpo ọkụ tubular reactor nke ethylene vinyl n'ihu ndepụta na oyi multipoint nri Nchikota mpụta, edo okpomọkụ ntọhapụ na nwekwara ike inwe mmetụta nke iwepu okpomọkụ nke mmeghachi omume, na reactor kachasị jaket jụrụ oyi ibu, belata ogologo nke reactor. , ma mee ka nkesa reactor okpomọkụ dị mma, kwalite ọnụego ntụgharị ethylene.N'otu oge ahụ, n'ihi multi-point n'akụkụ ndepụta, n'ihu na-ekpo ọkụ ethylene ndepụta ibu nke reactor na-ebelata, okpomọkụ ibu nke reactor inlet preheater na-ebelata, na oriri nke elu mgbali na ọkara mgbali uzuoku na-ebelata.

(5) A na-eji usoro mmiri na-achịkwa okpomọkụ mechiri emechi iji nye mmiri na jaket reactor iji wepụ okpomọkụ mmeghachi omume.Site n'ịkwalite okpomọkụ nke mmiri nke jaket mmiri, a na-eme ka ọkụ ọkụ na-eme ka ọ dịkwuo mma, a na-eme ka ogologo reactor dị mkpụmkpụ, na mgbanwe mgbanwe na-abawanye;

(6) Iweghachite na itinye n'ọrụ nke nrụgide dị elu na ike mmiri ọkụ na-ekpo ọkụ na-esi n'elu nke nrụgide nrụgide dị elu.

Usoro CTR

DSM CTR usoro mmeghachi omume nrụgide bụ 200 ~ 250MPa, mmeghachi omume okpomọkụ bụ 160 ~ 290 ℃, ntughari ọnụego bụ 28% ~ 33.1%, kacha nwere ike iru 38%, ngwaahịa njupụta bụ 0.919 ~ 0.928g / cm3, agbaze index bụ 0.3 ~ 65g / (10min), Oke otu ikike waya nwere ike iru 40 × 104T/A.Usoro a nwere njirimara teknụzụ ise:

(1) N'iji arụ ọrụ na-adịghị arụ ọrụ, nrụgide na-arụ ọrụ na-arụ ọrụ dị ala ma na-anọgide na-adịgide adịgide, ọnụego na-erugharị na reactor dị elu, ọ na-enwe mmetụta dị mma nke na-eme ka ọ dị mma, anaghị emepụta ihe na-ejide mgbidi, onye na-arụ ọrụ anaghị achọ nhicha na descaling, ma na-ebelata ụgwọ ọrụ;

(2) The reactor ọkpọkọ dayameta na-nọgidere na-adịgide adịgide, kpọmkwem "otu ngafe" ụkpụrụ na-nakweere, ọ dịghị mgbagwoju n'akụkụ akara nri usoro, reactor na nkwado imewe dị mfe, na ego bụ ala;

(3) a na-eme ka jaket reactor dị jụụ site na mmiri oyi, nke nwere ike ịmepụta uzuoku site na ngwaahịa;

(4) Ojiji nke onye na-ebido peroxide, ihe mejupụtara gel ngwaahịa dị ntakịrị, ọ nweghị ihe fọdụrụ na-akpata, mmetụta nchebe gburugburu ebe obibi dị mma;A na-emepụta oligomer dị ntakịrị, na usoro ịmegharị gas na-ekesa na-adị mfe.

(5) Ọnọdụ ọrụ dị mma na enweghị mgbanwe nrụgide n'oge polymerization na-eme ka ngwaahịa ndị dị elu dị elu, karịsịa ngwaahịa ihe nkiri, nke nwere ezigbo ngwa anya na nhazi nhazi, nwere ike ịmepụta ihe nkiri kacha nta nke 10μm ihe nkiri ngwaahịa, ma ngwaahịa ngwaahịa dị warara, enweghị ike imepụta ngwaahịa copolymer (EVA) nwere ntụzịaka mgbaze dị ala.

Teknụzụ mmepụta nke polyethylene dị ala site na usoro autoclave

The autoclave usoro na-eji a tank reactor na-akpali usoro, akụkụ ruru nwere ike si 2: 1 ka 20: 1, tank reactor olu bụ 0.75 ~ 3m3.The mmeghachi omume okpomọkụ bụ n'ozuzu 150 ~ 300 ℃, mmeghachi omume nrụgide bụ n'ozuzu 130 ~ 200MPa, mgbanwe ọnụego bụ 15% ~ 21%.

Ebe ọ bụ na kettle reactor bụ arịa nwere mgbidi buru ibu, nnyefe ọkụ site na mgbidi reactor na-amachibidoro karịa tubular reactor, ya mere mmeghachi omume bụ isi usoro adiabatic, ọ dịghịkwa ọkụ doro anya na-ewepụ na reactor.Okpomọkụ mmeghachi omume na-achịkwa nke ọma site na ntụtụ ọnụọgụ ọnụọgụ nke nri ethylene oyi iji dozie okpomọkụ mmeghachi omume.The reactor na-onwem na a moto chụpụrụ stirrer na-eme ka ngwakọta na reactor edo na-ezere obodo na-ekpo ọkụ tụrụ.The initiator bụ organic peroxide, nke nwere ike ịgbanye na dị iche iche ebe tinyere axial direction nke reactor na-etolite otutu mmeghachi omume ngalaba na dị iche iche na-arụ ọrụ okpomọkụ.Enweghị nchikota n'etiti ngalaba mmeghachi omume, ọrụ na-agbanwe agbanwe na ụdị ngwaahịa dị iche iche, nke nwere ike ịmepụta copolymerized EVA nwere ihe ruru 40% vinyl acetate ọdịnaya.

Lupotech A usoro

Lupotech A usoro na-eji A kpaliri tank reactor, reactor olu bụ 1.2m3, akụrụngwa na initiator na-injected n'ime reactor site otutu isi, mmeghachi omume nrụgide bụ 210 ~ 246MPa, kasị elu mmeghachi omume okpomọkụ bụ 285 ℃, regulator bụ propylene ma ọ bụ. propane, gbakwunyere site na ntinye ntinye nke abụọ compressor, nwere ike ịmepụta ụdị LDPE / EVA dị iche iche, Njupụta ngwaahịa bụ 0.912 ~ 0.951g / cm3, ntinye agbaze bụ 0.2 ~ 800g / (10min), ọdịnaya nke vinyl acetate nwere ike ịdị elu. na 40%, otu ụzọ ntụgharị ọnụego nke reactor bụ 10% ~ 21%, kacha otu akara imewe ọnụ ọgụgụ nwere ike iru 12.5 × 104t / a.

Usoro LupotechA nwere ike ọ bụghị naanị na-emepụta resin mkpuchi extruded nwere yinye alaka karịa yana mmetụta ka mma, kamakwa mepụta ngwaahịa ihe nkiri dị mkpa na nkesa ịdị arọ molekul.Enwere ike ịchịkwa ndenye agbaze na njupụta nke ngwaahịa LDPE / EVA nke ọma site na sistemụ njikwa APC, enwere ike nweta ngwaahịa edo edo.Isi okwu mmeghe nke usoro a bụ Sirbon petrochemical, Yangzi petrochemical, Shanghai petrochemical, wdg, ikike ngwaọrụ bụ 10 × 104T / a.

Exxon Mobil kettle usoro

Usoro tankị Exxon Mobil na-anakwere ihe nrụpụta 1.5m3 nke nwere ọtụtụ mpaghara.The reactor nwere a ibu akụkụ ruru, ogologo njigide oge, elu initiator arụmọrụ na narrower ngwaahịa molekụla arọ nkesa, nke bụ conducive na mmepụta nke mkpa film ngwaahịa na yiri àgwà ka tube usoro.

Onye na-achịkwa dị iche na usoro tube Exxon Mobil.A na-eji Isobutene ma ọ bụ n-butane, nke a na-ebuli elu na 25 ~ 30MPa site na mgbapụta diaphragm dị elu, na-agbanye ugboro abụọ na ntinye nke compressor, wee banye na reactor na ethylene.

The reactor mgbali nso bụ obosara, na kacha mmeghachi omume mgbali bụ 200MPa, nke nwere ike na-emepụta LDPE homopolymer na ala gbazee index na EVA copolymer na elu vinyl acetate ọdịnaya.

Usoro tankị Exxon Mobil nwere ike ịmepụta ngwaahịa homopolymer LDPE na ntinye agbaze nke 0.2 ~ 150g / (10min) na njupụta nke 0.910 ~ 0.935g / cm3.Agbaze index 0.2 ~ 450g / (10min) vinyl acetate ọdịnaya ruo 35% ethylene - vinyl acetate copolymer (EVA).Isi mmalite ụlọ nke usoro a bụ Lianhong Group (nke bụbu Shandong Hauda), ikike ngwaọrụ bụ 10 × 104T / a, TRINA, ikike ngwaọrụ bụ 12 × 104T / a, wdg.