Daim ntawv thov ntawm Gas Detectors nyob rau hauv Underground Pipe Corridors
Nroog underground cov yeeb nkab ua yeeb yam yog qhov chaw siv hluav taws xob hauv nroog tsim hauv av rau cov kav dej hauv nroog, uas siv cov kev npaj sib koom ua ke, tsim, tsim kho, thiab tu. Thaum lub sijhawm tsim kho, cov neeg ua haujlwm tau ua haujlwm hauv qhov chaw kaw lossis qhov chaw kaw, thiab kev tiv thaiv kev nyab xeeb rau kev ua haujlwm hauv qhov chaw kaw yog qhov tseem ceeb tshwj xeeb. Cov organic thiab inorganic cov khoom muaj nyob rau hauv cov dej phwj hauv tsev thiab cov dej khib nyiab thauj los ntawm cov kav dej thiab cov kav dej, nyob rau hauv cov xwm txheej anaerobic hauv cov kav dej kaw, tuaj yeem tsim ntau yam tshuaj lom, teeb meem, flammable, thiab tawg gases, xws li hydrogen sulfide, methane, carbon monoxide, thiab lwm yam. . Thaum cov pa roj mus txog ib qho concentration, nws tuaj yeem ua rau tus kheej raug mob rau cov neeg ua haujlwm thiab tawg thaum ntsib cov nplaim taws, ua rau muaj kev cuam tshuam rau ib puag ncig lossis ua rau neeg nyob ib puag ncig.
Muaj ntau qhov xwm txheej rau kev siv hluav taws xob hauv nroog thiab pej xeem: kev tshuaj ntsuam xyuas kev nyab xeeb ntawm cov pa roj, kev kuaj pom, thiab cov khoom siv hluav taws xob (CH4), hydrogen sulfide (H2S), thiab lwm yam; Cov cuab yeej siv hluav taws xob siv hluav taws xob tuaj yeem tsim nitric oxide (NO), nitrogen dioxide (NO2), thiab lwm yam.
Cov pa phem:
Lub nroog cov kav dej thoob plaws hauv nroog yog nyob hauv av thiab feem ntau yog siv los ua kom haum rau hauv nroog engineering pipelines. Nyob rau hauv qhov cua tsis zoo los yog lub sij hawm ntev ib puag ncig ib puag ncig, cov ntsiab lus oxygen yog thinner dua nyob rau hauv cov huab cua vim muaj kev cuam tshuam ib puag ncig. Vim yog hypoxia, cov khoom hauv cov kav dej thiab cov kav dej yuav ferment los tsim hydrogen sulfide (H2S), ammonia (NH3), methane (CH4), thiab carbon monoxide (CO) gases. Hypoxic ib puag ncig yog qhov txaus ntshai heev rau cov neeg soj ntsuam, xws li kiv taub hau, mob taub hau, tinnitus, kiv taub hau, ceg tawv tsis muaj zog, ua pa nyuaj, mob plawv, thiab txawm tias tuag taus. Hydrogen sulfide (H2S), ammonia (NH3), thiab carbon monoxide (CO) yog cov pa roj carbon monoxide (CO) uas tuaj yeem ua rau tib neeg ua pa ua pa thiab ua rau muaj cov tsos mob xws li kiv taub hau, xeev siab, ntuav, thiab coma. Thaum mob hnyav, lawv tuaj yeem ua rau poob siab lossis tuag taus. Methane (CH4) yog cov roj hluav taws kub hnyiab thiab tawg, nrog rau qhov muaj siab nyob hauv ib puag ncig, uas tuaj yeem tsim cov khoom tawg thiab cuam tshuam ncaj qha rau kev nyab xeeb ntawm cov kav dej hauv qhov chaw nws tus kheej.
