Yog lawm, mono ethylene glycol (MEG) yog suav tias yog ib qho tshuaj lom neeg muaj kev phom sij vim nws qhov ncauj toxicity, muaj peev xwm ua rau lub raum puas tsuaj, thiab muaj teeb meem tshwm sim tom qab raug tsis zoo los yog noj.
Mob toxicity thiab Health Risks
MEG ua rau muaj kev phom sij tshwj xeeb tom qab noj vim lub cev metabolizes nws mus rau hauv glycolic acid thiab oxalic acid, cov tebchaw uas tuaj yeem ua rau lub raum, lub paj hlwb, thiab cov hlab plawv. Cov tshuaj toxicity tau raug tshaj tawm nyob rau ntawm qhov raug tsawg li 1-1.5 mL / kg lub cev qhov hnyav, thiab tsis kho tshuaj lom yuav ua rau metabolic acidosis, raum tsis ua haujlwm, qaug dab peg, lossis tuag. Piv nrog rau propylene glycol, uas yog feem ntau siv hauv cov khoom noj thiab tshuaj tshuaj, MEG tau muaj kev phom sij ntau dua rau tib neeg txawm tias lawv cov tsos zoo sib xws thiab viscosity.
Raws li Txoj Cai Ntiaj Teb Kev Sib Raug Zoo (GHS), monoethylene glycol feem ntau raug cais raws li Cov Tshuaj Tiv Thaiv Kab Mob 4 (qhov ncauj). Cov tsos mob lom thaum ntxov tuaj yeem muaj xws li mob taub hau, kiv taub hau, xeev siab, ntuav, hais lus tsis txaus ntseeg, thiab kev sib koom tes tsis zoo, feem ntau ua rau lub raum tsis ua haujlwm hauv 24-72 teev yog tias tsis kho sai.
Kev Ua Haujlwm Raug Mob
Hauv kev lag luam ib puag ncig,Mono ethylene glycol (cas no 107-21-1)nthuav tawm cov teeb meem nruab nrab los ntawm kev sib cuag ntawm daim tawv nqaij, qhov muag pom, thiab nqus tau cov pa cua sov lossis aerosolized pos huab. Txawm hais tias MEG muaj qhov tsis sib haum xeeb nyob rau hauv chav tsev kub, glycol pos huab tsim nyob rau hauv siab - qhov kub thiab txias tuaj yeem ua rau khaus khaus thiab qhov muag. Raws li NFPA 704, MEG nqa qhov Kev Nyab Xeeb Kev Nyab Xeeb ntawm 2, qhia tias kev raug mob ib ntus lossis seem yuav tshwm sim thaum muaj mob hnyav lossis ntev ntev.
OSHA kev taw qhia kev nyab xeeb feem ntau pom zoo kom siv tshuaj lom neeg- hnab looj tes tiv thaiv, tsom iav tsom iav, hnav khaub ncaws tiv thaiv, thiab muaj cua txaus thaum tuav MEG hauv cov txheej txheem kaw. Piv nrog rau cov kuab tshuaj tsis haum xeeb xws li acetone lossis methanol, MEG ua rau qis qis qis hauv cov huab cua puag ncig, txo qis kev pheej hmoo ntawm kev nqus pa thaum lub sijhawm khaws cia thiab hloov chaw.
Environmental and Disposal Concerns
Kev tso tawm tsis raug ntawm monoethylene glycol rau hauv av lossis dej hauv lub cev tuaj yeem tsim kev phom sij rau ib puag ncig, tshwj xeeb tshaj yog nyob rau hauv loj - ntim cov khoom nchuav. Thaum lub sij hawm biodegradation,meg mono ethylene glycoltuaj yeem txo qis cov pa oxygen hauv cov dej, ua rau muaj kev ntxhov siab rau cov dej ecosystems thiab cov dej khib nyiab. Vim li no, cov kua siv glycol feem ntau tswj tau raws li kev tswj cov khoom pov tseg uas yuav tsum tau muaj ntawv tso cai pov tseg, rov ua dua tshiab, lossis rov ua kom sov.
Ntau qhov chaw muaj kev lag luam tam sim no siv glycol reclamation systems uas rov siv cov kab mob MEG rov qab los ua kom rov qab siv tau los yog cov cua sov- hloov cov kua, pab txo cov nqi pov tseg thiab kev cuam tshuam ib puag ncig. Piv nrog rau cov txheej txheem pov tseg tsis muaj kev tswj hwm, kaw- lub voj glycol rov ua haujlwm tuaj yeem txo qis kev tsim cov khib nyiab pov tseg hauv tsheb, HVAC, thiab kev tsim tshuaj lom neeg.
Kev khaws cia, kev thauj mus los, thiab kev faib kev nyab xeeb
Txawm hais tias nws muaj toxicity, MEG tseem siv dav vim tias nws cov thermal ua tau zoo heev thiab khov -cov khoom tiv thaiv. Dej-MEG coolant sib tov tuaj yeem ua haujlwm qis dua −35 degree, ua rau lawv muaj nyob rau hauv tsheb txias tshuab, muaj chillers, thiab cua sov- hloov daim ntawv thov. Txawm li cas los xij, MEG qhov tsis muaj xim tsis muaj xim thiab saj qab zib me ntsis txuas ntxiv ua rau muaj qhov xwm txheej lom lom uas cuam tshuam nrog menyuam yaus thiab tsiaj txhu thoob ntiaj teb.
Kev lag luam SDS kev taw qhia feem ntau pom zoo kom khaws MEG hauv cov thawv kaw nruj nreem qis dua 40 degree, kom deb ntawm cov khoom muaj zog oxidizing thiab zaub mov -cov ntaub ntawv sib cuag. Thaum MEG muaj qhov pheej hmoo tsis tshua muaj hluav taws xob piv nrog cov kuab tshuaj tsis hloov pauv, nws tseem raug cais raws li cov kua hluav taws xob hauv qee yam kev lag luam. Daim ntawv qhia txog kev phom sij meej, kev cob qhia kev nyab xeeb rau cov neeg ua haujlwm, cov txheej txheem tiv thaiv kev sib tsoo, thiab tag nrho SDS / GHS ua raws li tseem ceeb hauv kev thauj mus los, khaws cia, thiab kev ua haujlwm.
Xaus
Mono Ethylene Glycol (MEG)yog dav suav hais tias yog ib qho nruab nrab - mus rau - muaj tshuaj lom neeg muaj tshuaj lom neeg uas yuav tsum tau tswj tuav, khaws cia kom raug, thiab cov txheej txheem kev nyab xeeb nruj. Txawm hais tias nws tsis tshua muaj volatile thiab tsawg duanplaim tawsdua li ntau cov kuab tshuaj, nws cov tshuaj lom neeg rau tib neeg, tsiaj txhu, thiab cov dej hauv dej ua rau kev tswj hwm tshuaj tseem ceeb hauv txhua daim ntawv thov kev lag luam thiab kev lag luam.
