Lub tshuab ntsuas roj twg yog feem ntau siv hauv kev tsim kho qhov av?
Kev tsim kho qhov av yog qhov tseem ceeb tshaj plaws hauv engineering. Thaum lub sij hawm kev tsim kho ntawm tunnels, ib tug ntau ntawm flammable gases thiab ib co volatile organic tebchaw yuav raug tsim. Cov khoom tseem ceeb ntawm cov pa hluav taws xob yog methane (feem ntau hu ua roj), thiab qhov phom sij tseem ceeb yog kev sib tsoo tawg tshwm sim los ntawm cov roj combustion. Cov muaj pes tsawg leeg ntawm volatile organic tebchaw yog ib tug complex, thiab nws yog tsim nyog rau tib neeg lub cev.
Tam sim no uas peb paub cov roj av uas tsim nyob rau hauv qhov tunnels, nws ua rau kev txiav txim siab xaiv cov khoom siv hluav taws xob zoo.
Cov pa phem thiab cov pa phem hauv qhov av tuaj yeem tsim kev puas tsuaj rau tib neeg lub cev. Raws li cov txheej txheem sib txawv ntawm kev ua ntawm tib neeg lub cev, lawv feem ntau muab faib ua peb pawg: khaus khaus, asphyxiating gases, thiab mob lom lom organic gases.
1. Irritant gases: suav nrog chlorine, sulfur dioxide, ammonia, formaldehyde, ozone, nitrogen oxides, thiab lwm yam. Nws muaj zog stimulating nyhuv ntawm daim tawv nqaij thiab mucous daim nyias nyias ntawm tib neeg lub cev, thiab ib co ntawm lawv kuj muaj ib tug muaj zog corrosive nyhuv ntawm tib lub sijhawm.
2. Asphyxiating gases: xws li carbon monoxide, hydrogen sulfide, carbon dioxide, nitrogen, ethane, methane, hydrogen cyanide, ethylene, thiab lwm yam. Raws li lub npe implies, hom roj no yuav ua rau hypoxia nyob rau hauv cov ntaub so ntswg hlwb, thiab cov methane hais saum toj no yog. kuj yog asphyxiating gas.
3. Cov tshuaj lom neeg lom neeg cov pa phem (VOC): xws li dichloromethane, n-hexane, thiab lwm yam. Hauv kev ua haujlwm hauv qhov av, nws yog ib qho tsim nyog tsis yog tsuas yog txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau ua rau cov pa phem (VOC): xws li dichloromethane, n-hexane, thiab lwm yam. thiab kev tiv thaiv. Vim tias cov pa roj no feem ntau tsis tau mus txog qhov kev txwv qis qis, lawv cov tshuaj lom tau ua rau muaj kev phom sij ntau rau tib neeg lub cev. Yog li no, rau kev kuaj pom ntawm hom organic organic (voc), nws yog ib qho tsim nyog los ua ntej ntes cov tshuaj lom thiab tom qab ntawd qhov tawg txwv.
