Hauv tshuaj lom neeg, txheeb xyuas roj ntsha, thiab tshuaj siv tshuaj, tusfume hood yog ib qho tseem ceeb tshaj plaws ntawm cov khoom siv kev nyab xeeb. Nws siv tau zoo txaus phom, plua plav, thiab cov vapors, kom muaj kev nyab xeeb thiab huv chaw ua haujlwm.
Dab tsi yog fume hood?
A fume hoodyog aChaw Cua Chaw Ua Si Hauv ZosTsim los muaj thiab tso cov teeb meem ua kom muaj teeb meem tsim los thaum sim. Nws pabcuam ua tusThawj kab ntawm kev tiv thaivHauv kev ruaj ntseg kev nyab xeeb, siv tshuaj schthesis, kev npaj khoom siv tshuaj, thiab kev tshawb fawb muaj roj ntsha.
Fums hoodskhiav haujlwm raws liAerodynamicsthiabKev Tswj Xyuas Qhov Tsis Zoo, nrog cov txheej txheem tseem ceeb hauv qab no:
-
Cov Khoom Tsis Zoo
Tusfume hood'sua - hauvblower systemtsim cov chaw tsis zoo nyob sab hauv lub txee, tiv thaiv cov pa luam yeeb los ntawm kev khiav tawm mus rau hauv lub lab. Thaum lubSash (pem hauv ntej qhov rai)yog qhib, huab cua sab nraud ntws hauv kev tswj hwmNtsej muag nrawm(feem ntau0.3–0.5 m/s), tsim ibcua teeb meem.
-
Airflow Kev Taw Qhia & Kev Tso Tawm
Ducted fums hoods: Ncaj qha ntiab tawm cov cua tawm sab nraud ntawm ib Lab Lab lub qhov hluav taws xob hauv qhov system.
Ductless (recirculating) fume hoods: SivPab tsawglossisACTIVATED CARBON LIMkom lim kom ua ntej tso nws rov qab rau hauv ib txwm siv.
-
Ntsej Muag Velocity Tswj
TusNtsej muag nrawm(airflow ceev ntawm hood qhib) yog qhov tseem ceeb rau kev ua tau:
Tsawg heev (<0.3 m/s): Kev phom sij ntawm cov roj to.
Too high (>0.8 m/s): Muaj kev kub ntxhov yuav cuam tshuam kev sim.
Niaj hnubFums hoodsyam zoosensorsthiabAuto - tshuab kho tshuabTxhawm rau kom tswj tau airflow.
Hom fume hoods
| Ntaus | Cov Nta Tseem Ceeb | Zoo tshaj plaws rau |
|---|---|---|
| Ducted fume hood | Kev nyab xeeb siab, expels tawm sab nraud | Corrosive / Toxic Tshuaj |
| DTLless Fume hood | Lim -} Raws li, tsis muaj ductwork uas xav tau | Kev sim me me lossis ib ntus teeb tsa |
| Cov pa cua hood | Txo kev siv hluav taws xob los ntawm kev sib xyaw huab cua sab nraud | High -}} cua chaw lab |
| Tawg - ein proof proof e food | Anti {- zoo li qub, corrosion -} Cov ntaub ntawv resistant | Flammable / cov tshuaj yeeb yaj kiab tawg |
Yuav ua li cas xaiv cov ntsej muag zoo hood?
Hla - bergder cov neeg yuav khoom yuav tsum xav txog:
- Daim ntawv thov: Koj puas kam ua cov kua qaub, cov kuab tshuaj, lossis cov ntaub ntawv xov xwm hluav taws xob?
- Qhov cua tshuab: Puas yog ib qho kev kuaj mob muaj lub tso pa tawm? Yog tias tsis yog, xaiv rau ductless.
- Ntawv muaj: SaibEN 14175, 110, lossisOsha ua raws.
- Zog Efficiency: Sib txawv - nrawm tshuab hluav taws xob txo kev siv hluav taws xob.
Txij Nkawm & Cov Lus Qhia Kev Nyab Xeeb
Tsis tu ncua kuajairflow velocitythiabKev lim dej.
Zam kev swb hauv lub hood los tswj kom muaj airflow kom zoo.
Khaws lub sash ntawm cov kev pom zoo qhov siab (feem ntau khij nrog txoj kab kev nyab xeeb).
Tag
Fums hoods yog lubUnsung cov phab ejNtawm kev sim ua tsis muaj kev nyab xeeb, sib txuas ua ntej engineering nrog kev tiv thaiv tseem ceeb.