nūhou

polyethylene haʻahaʻa haʻahaʻa (LDPE)ʻO ka ethylene polymerized e like me ka polymerization monomer, peroxide e like me ka mea hoʻomaka, ka thermoplastic resin i loaʻa e ka free radical polymerization reaction, ʻo ke kaumaha o ka molekala ma ke ʻano he 100000 ~ 500000, ʻo ka density he 0.91 ~ 0.93g/cm3, ʻo ia ka māmā o ka polyethylene resin. .

Loaʻa iā ia ka palupalu maikaʻi, extensibility, insulation uila, transparency, hana maʻalahi a me kekahi ea permeability.ʻO ke kūpaʻa kemika maikaʻi, ke kūpaʻa alkali, ke kūʻē ʻana i nā mea hoʻoheheʻe kūlohelohe maʻamau, he nui nā mea hoʻohana, e like me ka extrusion coating, blow film, wire and cable coating, injection molding a blow molding hollow molding, etc.

Ma muli o ke ola pōkole o nā radical manuahi i hana ʻia e ka mea hoʻomaka, ua hoʻopiʻi nui ʻia ka ethylene ma ka hoʻonui ʻana i ke kaomi ʻana (110 ~ 350MPa), no laila e hoʻonui ʻia kona density i 0.5g / cm3, e like me ka wai hiki ʻole. e omi hou.I mea e hoʻopōkole ai i ka ethylene molecular spacing a hoʻonui i ka likelika o ka hui ʻana ma waena o nā radical manuahi a i ʻole nā ​​kaulahao ulu ikaika a me nā molekala ethylene, ua lawe ʻia ka hopena polymerization radical manuahi.Hana ʻia ka polyethylene haʻahaʻa haʻahaʻa, no laila ua kapa ʻia ka polyethylene haʻahaʻa haʻahaʻa haʻahaʻa haʻahaʻa haʻahaʻa haʻahaʻa.

ʻO ka hana hana polyethylene haʻahaʻa haʻahaʻa

ʻO ke kaʻina hana o ka polyethylene haʻahaʻa haʻahaʻa e pili ana i ka ethylene ʻelua-pae compression, initiator a me regulator injection, polymerization reaction system, high and low pressure separation and recovery system, extrusion granulation a me post-treatment system, etc.

E like me ke ʻano o ka reactor, hiki ke hoʻokaʻawale ʻia i ʻelua ʻano: kiʻekiʻe-pressure tube method a me autoclave method.

ʻO ke kaʻina hana tubular a me ke kaʻina ipu i kā lākou mau hiʻohiʻona: ʻo ka tubular reactor he hana maʻalahi, hana maʻalahi a mālama ʻia, a hiki ke kū i ke kaomi kiʻekiʻe;He paʻakikī ke ʻano o ka reactor, a paʻakikī ka mālama ʻana a me ka hoʻokomo ʻana.I ka manawa like, liʻiliʻi ka nui o ka reactor ma muli o ka palena o ka hiki ke wehe i ka wela.

Ma ka ʻōlelo maʻamau, hoʻohana ʻia ke ʻano paipu no nā hoʻonohonoho nui, ʻoiai ke hoʻohana ʻia ke ʻano kettle no nā hoʻonohonoho e hana ana i nā huahana kiʻekiʻe e like me ka EVA o ka papa kūikawā a me ka ʻike kiʻekiʻe o ka vinyl acetate.

Ma muli o nā hiʻohiʻona o nā kaʻina hana like ʻole, ʻoi aku ka nui o nā kaulahao lālā a me ka ikaika hopena maikaʻi i ke ʻano o ka ipuhao, kūpono ia no ka extruding coating resin.ʻO ke ʻano o ka paipu he ākea ka hāʻawi ʻana i ke kaumaha molecular, liʻiliʻi i ke kaulahao lālā a me ka waiwai optical maikaʻi, i kūpono no ka hana ʻana i nā kiʻiʻoniʻoni lahilahi.

High pressure paipu ala haʻahaʻa density polyethylene hana 'enehana

ʻO ke anawaena o loko o ka tubular reactor maʻamau he 25 ~ 82mm, ʻo ka lōʻihi he 0.5 ~ 1.5km, ʻoi aku ka nui o ka hiʻohiʻona ma mua o 10000: 1, ʻo ke anawaena o waho a hiki i ke anawaena o loko ka mea maʻamau ʻaʻole i emi iho ma mua o 2mm, a ʻo ka ʻaʻahu wai. hoʻohana ʻia e hoʻoneʻe i ka ʻāpana o ka wela.

I kēia manawa, ua like ka paipu i ke ʻano like e hoʻoponopono ai i ke kahe kumu, ka hoʻohana ʻana i nā wahi hānai reactor ʻē aʻe, ʻokoʻa molecular weight regulator, initiator a me kona wahi injection, a me nā ʻano like ʻole o ka hoʻopili ʻana i ka mea kanu, ka hoʻoili ʻana o ka huahana, ka nui o ka hoʻihoʻi ʻana o ethylene a hoʻouna i ke kūlana, ua hoʻokumu i nā hiʻohiʻona like ʻole o ka hana.

I kēia manawa, ʻo ka ʻenehana kaʻina hana tubular makua ka nui o ka LyondellBasell's Lupotech T kaʻina, ke kaʻina tubular Exxon Mobil a me ke kaʻina CTR o DSM.

Lupotech T kaʻina

Hoʻohana ʻia ke kaʻina hana LyondellBasell Lupotech T ma kahi o 60% o ka hiki ke hana hale o nā mea kanu polyethylene haʻahaʻa haʻahaʻa.ʻO ke kaomi o ka hopena 260 ~ 310MPa, ka mahana hopena 160 ~ 330 ℃, hoʻokahi ala hoʻololi o 35%, ka nui o ka huahana 0.915 ~ 0.935g / cm3, ka helu hoʻoheheʻe 0.15 ~ 50g / 10min, hoʻokahi laina hana mana 45 × 104T / A, ʻElima mau hiʻohiʻona o ke kaʻina hana:

(1) Hoʻohana ʻia ka ʻenehana Pulse reactor e ʻike i ka wehe ʻana o ka valve, ka lōʻihi o ka wehe ʻana a me ka hoʻololi pinepine ʻana i ka hopena o ka reactor.Hiki i ka hana Pulse ke hoʻomaikaʻi i ka hopena hui ʻana i ka reactor, ke kūpaʻa maikaʻi o ka hopena, ke kiʻekiʻe o ka hoʻololi ʻana, e hōʻemi i ka hoʻopili ʻana o ka paia reactor, hoʻomaikaʻi i ka coefficient hoʻoili wela, a ʻoi aku ka maikaʻi o ka hoʻohemo ʻana i ka wela o ka wai ʻaʻahu;

(2) Ua hoʻokomo ʻia nā peroxides i nā wahi like ʻole o ka reactor ma nā wahi ʻehā e hana ai i ʻehā mau ʻāpana o ka wahi pane;

(3) Me ka propylene, propanaldehyde e like me ka molecular weight regulator, i hoʻokomo ʻia e kahi inlet compressor, me ka ethylene i loko o ka reactor, ākea huahana;

(4) Hiki ke hoʻomaopopo i ka hoʻomaʻemaʻe hoʻomaʻemaʻe, hoʻoheheʻe a me ka dewaxing kiʻekiʻe ma o ka mana sequential, e hōʻemi ana i ka hopena i nā hana hana maʻamau;

(5) E hoʻonohonoho i ka ʻōnaehana wai wela e hōʻemi i ka hoʻohana ʻana i ka wai anuanu, a hoʻihoʻi hou i ka wela o ka hopena polymerization a me ka ʻōnaehana kinoea holo kiʻekiʻe no nā mea ʻē aʻe.

ʻO ke kaʻina hana tubular Exxon Mobil

ʻO ke kaʻina hana o Exxon Mobil tube kaʻina he 250 ~ 310MPa, ʻo ka mahana hopena he 215 ~ 310 ℃, ʻo ka helu hoʻololi a hiki i 40%, ʻo ka nui o ka huahana he 0.918 ~ 0.934g / cm3, ʻo ka helu hoʻoheheʻe he 0.2 ~ 50g / (10min), a ʻo ka mana hana laina hoʻokahi he 50 × 104T/A.He ʻeono mau hiʻohiʻona o ke kaʻina hana:

(1) Hoʻohana ʻia ka pahu hoʻoheheʻe hoʻoheheʻe hoʻoneʻe, a hoʻonui ʻia ke anawaena o ka reactor i kēlā me kēia ʻanuʻu ma ke ala axial e hoʻomaikaʻi ai i ka kahe o ke kinoea a me ka hāʻule ʻana o ke kaomi reactor.E hoʻonui i ka paʻa o ka hopena, e hoʻemi i ka hopena decomposition, e hoʻemi i ka pālākiō i loko o ka reactor, e hoʻomaikaʻi i ka hoʻololi wela o ka reactor;

(2) Hoʻokomo ʻia ka mea hoʻomaka ma ka ʻaoʻao axial o ka reactor, hiki ke hana i ka 4 ~ 6 reaction zones, hoʻomaikaʻi i ka helu hoʻololi a me ka hiki ke hana, a me ka laulā huahana;

(3) Hoʻohana maʻamau i ka propylene ma ke ʻano he mea hoʻoponopono e hoʻomalu i ka helu hoʻoheheʻe, ka hana ʻana o nā huahana medium-density me ka hoʻohana ʻana i ka propanaldehyde ma ke ʻano he mea hoʻoponopono, regulator ma o ke kaomi kiʻekiʻe diaphragm pump injected i ka compressor inlet ʻelua, a laila me ka ethylene i loko o ka reactor;

(4) me ka hoʻohana ʻana i ka reactor tubular wela o ka ethylene vinyl i mua i ka hānai a me ke anuanu multipoint hānai hui pū ʻana o ka ʻaoʻao, hoʻokuʻu wela like ʻole a loaʻa paha ka hopena o ka wehe ʻana i ka wela o ka pane ʻana, ua hoʻonui ka reactor i ka ukana hoʻoluʻu jacketed, hoʻemi i ka lōʻihi o ka reactor. , a hana i ka puunaue wela o ka reactor ma ka maalahi, e hoonui i ka hoololi ethylene.I ka manawa like, ma muli o ka nui o nā ʻaoʻao ʻaoʻao, ua hoʻemi ʻia ka nui o ka meaʻai ethylene wela i mua o ka reactor, ua hoʻemi ʻia ka haʻawe wela o ka reactor inlet preheater, a ua hoʻemi ʻia ka ʻai ʻana o ke kaomi kiʻekiʻe a me ka mahu.

(5) Hoʻohana ʻia ka ʻōnaehana wai e hoʻoponopono ai i ka wela e hoʻolako i ka wai i ka ʻaʻahu reactor e wehe i ka wela o ka hopena.Ma ka hoʻonuiʻana i ka mahana o ka waiʻaʻahu, ua hoʻonuiʻia ka maikaʻi o ka hoʻololiʻana i ka wela, ua pōkole ka lōʻihi o ka reactor, a ua hoʻonuiʻia ka hoʻololiʻana;

(6) Hoʻihoʻi a me ka hoʻohana ʻana i ke kaomi kiʻekiʻe a me ka ikehu wai wela wela i hoʻokuʻu ʻia mai luna o ka mea hoʻokaʻawale puʻuwai kiʻekiʻe.

Kaʻina CTR

ʻO ke kaʻina hana DSM CTR ʻo 200 ~ 250MPa, ka mahana o ka hopena he 160 ~ 290 ℃, ka helu hoʻololi ʻana he 28% ~ 33.1%, hiki ke kiʻekiʻe loa i 38%, ʻo ka nui o ka huahana he 0.919 ~ 0.928g/cm3, he 0.3 ~ 65g ka helu hoʻoheheʻe. / (10min), Hiki i ka nui o ka uwea hoʻokahi ke hiki i 40 × 104T / A.ʻElima mau hiʻohiʻona ʻenehana ke kaʻina hana:

(1) Ke hoʻohana nei i ka hana non-pulse, haʻahaʻa ke kaomi hana reactor a hoʻomau mau, kiʻekiʻe ka kahe o ka reactor, he hopena maikaʻi ʻo ia, ʻaʻole hana i ka pā pōhaku, ʻaʻole pono ka reactor i ka hoʻomaʻemaʻe a me ka descaling, a hoemi i ka uku hana;

(2) Hoʻomau mau ʻia ke anawaena paipu reactor, ʻae ʻia ke kumu "hoʻokahi-pass" pololei, ʻaʻohe ʻōnaehana hānai ʻaoʻao paʻakikī, ʻoi aku ka maʻalahi o ka reactor a me ka hoʻolālā kākoʻo, a ʻoi aku ka haʻahaʻa o ke kālā;

(3) hoʻoluʻu ʻia ka lole reactor e ka wai anuanu, hiki ke hana i ka mahu ma ka huahana;

(4) ʻO ka hoʻohana ʻana i ka peroxide initiator, liʻiliʻi ka hui gel huahana, ʻaʻohe koena catalyst, maikaʻi ka hopena palekana o ka nohona;Ua liʻiliʻi nā oligomer, a ua maʻalahi ke kaʻina hana hou o ke kinoea holo.

(5) ʻO nā kūlana hana maikaʻi a ʻaʻohe piʻi o ke kaomi i ka wā polymerization e hana i nā huahana kiʻekiʻe, ʻoi aku ka maikaʻi o nā huahana kiʻiʻoniʻoni, me nā waiwai optical maikaʻi loa a me nā waiwai hoʻoponopono, hiki ke hana i ka mānoanoa kiʻiʻoniʻoni liʻiliʻi o nā huahana kiʻiʻoniʻoni 10μm, akā haiki ka laulā huahana, ʻAʻole hiki ke hana i nā huahana copolymer (EVA) me ka helu hoʻoheheʻe haʻahaʻa.

ʻenehana hana o ka polyethylene haʻahaʻa haʻahaʻa ma ke ʻano autoclave

Ke hoʻohana nei ke kaʻina hana autoclave i kahi reactor tank me kahi ʻōnaehana hoʻoulu ʻana, hiki ke kiʻi ʻia mai 2: 1 a 20: 1, ʻo ka nui o ka pahu reactor he 0.75 ~ 3m3.ʻO ka mahana wela maʻamau he 150 ~ 300 ℃, ʻo ke kaomi ʻana ma ke ʻano he 130 ~ 200MPa, ʻo ka hoʻololi ʻana he 15% ~ 21%.

No ka mea, he ipu pā mānoanoa ka ipu hao, ʻoi aku ka palena o ka hoʻoili ʻana o ka wela ma ka paia o ka reactor ma mua o ka tubular reactor, no laila, he hana adiabatic ka hopena, a ʻaʻohe wela e wehe ʻia mai ka reactor.Hoʻomalu nui ʻia ka wela o ka hopena e ka multi-point injection o ka meaʻai ethylene anuanu e kaulike i ka wela o ka hopena.Hoʻolako ʻia ka reactor me kahi mea hoʻoulu kaʻa e hana i ka hui ʻana i ka ʻaʻahu reactor a pale i nā wahi wela kūloko.ʻO ka mea hoʻomaka he organic peroxide, hiki ke hoʻokomo ʻia ma nā wahi like ʻole ma ke ala axial o ka reactor e hana i nā ʻāpana pane he nui me nā mahana hana like ʻole.ʻAʻohe backmixing ma waena o nā ʻāpana hopena, ka hana maʻalahi a me ka laulā huahana ākea, hiki ke hana i ka EVA copolymerized a hiki i ka 40% vinyl acetate content.

Lupotech He kaʻina hana

Lupotech Ke hoʻohana nei ke kaʻina hana i kahi reactor tank i hoʻoulu ʻia, ʻo ka nui o ka reactor he 1.2m3, hoʻokomo ʻia nā mea maka a me ka mea hoʻomaka i loko o ka reactor e nā helu he nui, ʻo ke kaomi ʻana he 210 ~ 246MPa, ʻo ka mahana wela kiʻekiʻe loa he 285 ℃, propylene a i ʻole. propane, hoʻohui ʻia e ka lua compressor inlet, hiki ke hana i nā ʻano huahana LDPE / EVA, ʻO ka nui o ka huahana he 0.912 ~ 0.951g / cm3, ʻo ka helu hoʻoheheʻe he 0.2 ~ 800g / (10min), hiki ke piʻi aʻe ka ʻike o ka vinyl acetate. i 40%, ka helu hoʻololi hoʻokahi ala o ka reactor he 10% ~ 21%, hiki i ka nui o ka hoʻolālā laina hoʻokahi ke hiki i 12.5 × 104t / a.

ʻAʻole hiki i ke kaʻina Lupotech ke hana wale i ka resin i uhi ʻia me ka kaulahao lālā a ʻoi aku ka maikaʻi o ka hopena, akā hana pū kekahi i nā huahana kiʻiʻoniʻoni lahilahi me ka hāʻawi ʻana i ke kaumaha molecular ākea.Hiki ke hoʻomalu maikaʻi ʻia ka helu hoʻoheheʻe a me ka nui o nā huahana LDPE/EVA e ka ʻōnaehana mana APC, a hiki ke loaʻa nā huahana like ʻole.ʻO ka hoʻokomo home nui o kēia kaʻina hana ʻo Sirbon petrochemical, Yangzi petrochemical, Shanghai petrochemical, a me nā mea ʻē aʻe, ʻo ka mana o ka mīkini he 10 × 104T / a.

ʻO ke kaʻina kīʻaha Exxon Mobil

Hoʻohana ke kaʻina pahu pahu Exxon Mobil i kahi reactor pahu pahu nui 1.5m3 i hoʻolālā ʻia.ʻOi aku ka nui o ka lākiō o ka reactor, ʻoi aku ka lōʻihi o ka mālama ʻana, ʻoi aku ka maikaʻi o ka hoʻomaka ʻana a me ka hāʻawi ʻana i ke kaumaha molekala huahana, kahi kūpono i ka hana ʻana i nā huahana kiʻiʻoniʻoni lahilahi me ka maikaʻi like me ke kaʻina paipu.

He ʻokoʻa ka mea hoʻoponopono mai ke ʻano o ka paipu Exxon Mobil.Hoʻohana ʻia ʻo Isobutene a i ʻole n-butane, i hoʻonui ʻia i ka 25 ~ 30MPa ma o ke kaomi diaphragm kiʻekiʻe, hoʻokomo ʻia ʻelua ma ka inlet compressor, a komo i ka reactor me ka ethylene.

He ākea ka laulā o ka reactor, a he 200MPa ka hopena kiʻekiʻe loa, hiki ke hana i ka homopolymer LDPE me ka helu hoʻoheheʻe haʻahaʻa a me ka copolymer EVA me ka maʻi vinyl acetate kiʻekiʻe.

Hiki i ke kaʻina pahu pahu Exxon Mobil ke hana i nā huahana homopolymer LDPE me ka helu hoʻoheheʻe o 0.2~150g/ (10min) a me ka nui o 0.910~0.935g/cm3.Helu helu helu 0.2 ~ 450g / (10min) vinyl acetate content a hiki i ka 35% ethylene - nā huahana vinyl acetate copolymer (EVA).ʻO ka hoʻokomo nui ʻana o kēia kaʻina hana ʻo Lianhong Group (ʻo Shandong Hauda ma mua), ʻo 10 × 104T / a, TRINA ka mana o ka mīkini, ʻo 12 × 104T /a ka mana, a pēlā aku.