PVC yog ib qho ntawm tsib yam khoom siv resin thoob ntiaj teb, nrog cov yam ntxwv zoo heev xws li acid thiab alkali tsis kam, hnav tsis kam, nplaim taws tsis kam, thiab rwb thaiv tsev. Tam sim no, nws tau dhau los ua cov khoom yas thib ob loj tshaj plaws hauv ntiaj teb tom qab polyethylene.
1. Muaj peev xwm tsim khoom hauv tsev thiab cov zis ntawm PVC
Cov txheej txheem tsim khoom ntawm PVC feem ntau suav nrog ob txoj hauv kev: txoj kev calcium carbide thiab txoj kev ethylene, nrog rau qhov sib txawv tseem ceeb yog txoj kev npaj ntawm vinyl chloride monomer.
Los ntawm qhov kev xav ntawm kev tsim khoom hauv xyoo tas los no, kev tsim khoom PVC tau pom tias muaj kev nce ntxiv txhua xyoo, thiab tag nrho cov peev xwm tsim khoom ntawm kev lag luam tau nkag mus rau theem kev txhim kho zoo. Kev thov ntawm kev ua lag luam tau maj mam rov zoo, thiab kev tsim khoom tau nce ntxiv tas li. Raws li cov ntaub ntawv los ntawm Tuam Tshoj Chloroalkali Network, tag nrho cov nqi ua haujlwm ntawm Tuam Tshoj kev lag luam PVC tau tseem nyob siab dua 50% hauv xyoo tas los no.
2. Kev Txhim Kho ntawm PVC Kev Lag Luam
(1) Txhawb kev tsim kho cov khoom siv sib koom ua ke hauv kev lag luam
Txij li xyoo 2007, lub teb chaws tau tsim cov cai tswjfwm uas muab cov cai tswjfwm ntxaws ntxaws rau kev txhim kho kev lag luam PVC. Tib lub sijhawm, nws txhawb kom muaj kev tsim cov khoom siv txhawb nqa rau cov tuam txhab tsim khoom calcium carbide thiab chlor alkali, thiab txhawb nqa kev tsim cov khoom siv sib koom ua ke hauv kev lag luam. Nyob rau hauv kev taw qhia ntawm cov cai hauv tebchaws tam sim no, kev tsim cov khoom siv sib koom ua ke hauv kev lag luam tau dhau los ua qhov tsis zam hauv thaj chaw nruab nrab thiab sab hnub poob ntawm Suav teb, uas nplua nuj nyob rau hauv thee, cov chaw zeb ntsev, thiab cov peev txheej limestone. Nyob rau hauv lub luag haujlwm ntawm cov khoom siv sib koom ua ke, los ntawm kev vam khom cov txiaj ntsig zoo ntawm cov peev txheej thiab cov txiaj ntsig sib phim, cov nqi tsim khoom tuaj yeem tswj tau zoo thiab ntau yam khoom lag luam tuaj yeem rov ua dua tshiab, Txhim kho kev sib tw ua lag luam thiab kev muaj peev xwm ciaj sia ntawm lub tuam txhab.
(2) Cov txheej txheem tsim khoom sib txawv
Hauv kev txhim kho tam sim no ntawm cov tuam txhab PVC hauv tsev, qhov tseem ceeb ntawm kev sib txawv ntawm cov txheej txheem khoom siv tsim khoom yog nce ntxiv tas li, uas ua rau lawv cov kev xav tau rau theem thev naus laus zis nce siab. Qhov sib txawv ntawm kev sib txawv ntawm cov txheej txheem tsis tuaj yeem nres. Nrog rau kev txhim kho ntxiv ntawm cov txheej txheem tsim khoom PVC hauv tsev, cov tuam txhab lag luam yuav tsum maj mam siv qee cov txheej txheem tsim khoom tshiab thaum khaws cov txheej txheem calcium carbide qub. Tib lub sijhawm, cov thev naus laus zis PVC polymerization kuj tseem yuav raug txhim kho zoo heev, tshwj xeeb tshaj yog nyob rau hauv cov nqe lus ntawm lub peev xwm tsim khoom ntawm cov reactors polymerization. Tsis tas li ntawd, nws tseem yog qhov tsim nyog los qhia cov thev naus laus zis tsim khoom txawv teb chaws thiab maj mam txhawb lawv kom txhim kho kev lag luam zoo ntawm kev lag luam.
Lub sijhawm tshaj tawm: Lub Xya Hli-28-2023
