Kev tiv thaiv ib puag ncig hauv kev tsim cov naphthalene superplasticizer project
Dec 19, 2023
Kev tiv thaiv ib puag ncig hauv kev tsim cov naphthalene superplasticizer project
Naphthalene series high-efficiency dej txo tus neeg sawv cev; kev tiv thaiv ib puag ncig; xoom tawm
Naphthalene series high-efficiency dej txo tus neeg sawv cev [1] yog ib hom kev sib xyaw ua ke. Nws lub npe tshuaj yog naphthalene sulfonate formaldehyde condensate. Nws muaj zog dispersion nyhuv ntawm cov cement hais. Nws muaj lub zog thaum ntxov thiab siab zog rau kev npaj cov pob zeb loj loj. Qhov yuav tsum tau cam khwb cia-nyob rau hauv-qhov chaw pob zeb thiab prefabricated Cheebtsam muaj kev siv tau zoo thiab tuaj yeem txhim kho thiab txhim kho ntau yam khoom ntawm pob zeb. Lawv tau dav siv nyob rau hauv txoj kev loj, txuas hniav, dams, ports, tunnels, hluav taws xob fais fab, kev txuag dej thiab kev lag luam thiab kev tsim kho vaj tse. , steam-kho thiab natural cured prefabricated Cheebtsam [2], uas tau txais kev saib xyuas thoob plaws vim lawv kov yeej cov kev tsis txaus ntawm cov dej-txo cov neeg ua haujlwm uas yooj yim ua rau cov pob zeb poob qis [3]. Ntawm cov pob zeb dej-txo cov neeg ua haujlwm hauv kuv lub teb chaws Cov khoom siv dav dav thiab ntau tshaj plaws [4]. Cov khoom siv raw rau kev tsim cov naphthalene-based high-efficiency superplasticizers feem ntau yog 95% muaj naphthalene, 98% concentrated sulfuric acid, 37% formaldehyde, thiab 30% mus rau 45% caustic soda (tsawg chloride ion ntsiab lus). (tsawg dua 2%) [3] thiab kais dej, thiab lwm yam. Tam sim no, muaj ntau lub tuam txhab hauv tsev tsim cov tshuaj naphthalene-based high-efficiency dej txo cov neeg ua haujlwm. Vim muaj qhov sib txawv ntawm cov txheej txheem tsim khoom thiab kev tsim khoom, ntau lub tuam txhab yuav tsim qee cov pa khib nyiab, dej khib nyiab thiab lwm yam kuab paug. Yog tias tsis kho kom raug, nws yuav ua rau muaj kev hem thawj rau ib puag ncig.
2 Kev soj ntsuam cov pa phem emissions thiab kev ntsuas kev kho mob
2.1 Exhaust gas ntau lawm thiab emission
Cov pa khib nyiab feem ntau yog ua cov pa tso pa thiab me me ntawm cov pa khib nyiab tsis sib haum thaum tsim khoom, khaws cia thiab thauj mus los. Cov txheej txheem tso pa muaj xws li naphthalene melting thiab sulfonation txheej txheem khib nyiab, cov txheej txheem condensation pov tseg thiab neutralization txheej txheem khib nyiab.
(1) Cov pa khib nyiab los ntawm cov txheej txheem molten naphthalene thiab sulfonation. Cov pa phem tseem ceeb ntawm molten naphthalene khib nyiab thiab sulfonation khib nyiab yog naphthalene vapor thiab sulfuric acid pos huab. Naphthalene tau zoo los ntawm kev ua kom txias thiab crystallization nyob rau hauv rau-theem sedimentation chamber, thiab tom qab ntawd ntxuav los ntawm ob-theem alkali tshuaj tsuag voj voog. Capture naphthalene vapor thiab nqus sulfuric acid pos huab. Kev tsim kho kev ua tau zoo ntawm naphthalene vapor thiab sulfuric acid pos huab yog ntau dua 90% thiab 98% feem. Tom qab kev kho cov pa khib nyiab mus txog tus qauv, nws yuav raug tso tawm rau hauv qhov chaw los ntawm 15 m siab tso pa yeeb nkab.
Thaum lub sij hawm molten naphthalene thiab sulfonation txheej txheem, naphthalene thiab sulfuric acid yuav sublimate (evaporate) thaum lub reactor heats li. Lub naphthalene vapor dhau los ntawm 6-theem kev teeb tsa chamber, uas yog rau qhov sib txuas ntawm cov chav txias txias, thiab cov chav txias txias yog qhov kub thiab txias; Txhua Qhov Kev faib phab ntsa yog teem rau hauv chav txias kom txo qhov ceev ntawm naphthalene vapor ntws los ntawm chav nyob thiab ncua sij hawm nyob kom lub naphthalene vapor tuaj yeem ua kom txias hauv chav txias txias. Lub boiling point ntawm naphthalene yog 217.9 degree, thiab qhov kub ntawm lub settling chamber yog tsawg tshaj li lub boiling point ntawm naphthalene. , cov naphthalene vapor tuaj yeem txias thiab crystallized tom qab dhau los ntawm rau-theem teeb tsa chamber. Qhov txias thiab crystallization efficiency ntawm ib-theem teeb tsa chamber yog ntau dua 50%. Raws li cov ntaub ntawv tsim tawm ntawm Guangdong Jianhua Pipe Pile Co., Ltd., lub tuam txhab siv rau 6-theem settling chamber kom condensate thiab rov qab naphthalene 50 t / a; Sulfuric acid pos huab tuaj yeem nqus tau los tsim sodium sulfate tom qab tau txau nrog ob-theem alkali kua. Cov kua alkali muaj qhov nqus tau zoo thiab kev kho mob zoo rau sulfuric acid pos huab, thiab ib-theem kev nqus tau zoo tshaj 90%. Tsis tas li ntawd, alkali tshuaj txau muaj qhov nqus thiab ua haujlwm zoo rau naphthalene. Chav muaj qee qhov kev ua kom zoo ntawm kev ntes, thiab kev ntes tau ntau dua 50%.
Condensation txheej txheem pov tseg roj. Lub ntsiab pa phem ntawm condensation khib nyiab yog sulfuric acid pos huab thiab formaldehyde. Lub condensation khib nyiab yog txau los ntawm lub twj tso kua mis alkaline kom ntes thiab nqus sulfuric acid pos huab thiab formaldehyde. Kev tshem tawm sulfuric acid yog ntau dua 98%, thiab kev kho formaldehyde efficiency yog ntau dua 96%. .Tom qab kev kho cov pa roj condensation mus txog tus qauv, nws yuav raug tso tawm mus rau hauv qhov chaw los ntawm 15 m siab tso cov yeeb nkab.
Phau ntawv Journal ntawm Shenyang University (Natural Science Edition) Subscription 2011 Issue 4
naphthalene superplasticizer; kev tiv thaiv ib puag ncig; xoom dej phwj tawm
TU 528.042; X 322
A
1008-9225(2011)04-0007-03
2011-03-15
Fang Zhifang (1975-), txiv neej, los ntawm Hanchuan, Hubei Xeev, yog ib tug kws tshaj lij ntawm Zhongshan Institute of Environmental Protection Sciences thiab tus neeg sib tw kawm tiav qib siab.
[Editor in charge: Liu Naiyi]
