Vim muaj cov ntsiab lus dej siab ntawm cov sludge tom qab cov txheej txheem sludge thickening hauv cov dej phwj tuaj kho, nws tseem nyob hauv cov kua dej. Yog li ntawd, sludge dewatering thiab qhuav chemical txheej txheem yuav tsum tau kho. Qhov no tsis yog tsuas yog txo qhov ntim tab sis kuj muaj txiaj ntsig zoo rau qhov nyuaj thiab tus nqi ntawm kev pov tseg tom ntej. Txawm li cas los xij, vim yog kev ua ntawm cov kab mob thiab cov kab mob hauv cov sludge thaum lub sij hawm sludge dewatering txheej txheem, kuj muaj ib tug loj tus naj npawb ntawm txaus ntshai gases ntawm qhov chaw. Yog li, dab tsi yog qhov txaus ntshai thiab teeb meem gases hauv cov txheej txheem sludge dewatering? Feem ntau, nws feem ntau suav nrog hydrogen sulfide, biogas (methane), ammonia, thiab lwm yam. Kev teeb tsa thiab kev siv tshuaj lom.gas tswj vaj huam sib luagthiabtsau multi gas detectornyob rau hauv sludge dewatering cheeb tsam ntawm qhov chaw kuj yog los xyuas qhov concentration qhov tseem ceeb ntawm cov teeb meem gases nyob rau hauv cov huab cua ambient kom tsis txhob muaj xwm txheej txaus ntshai.
Sludge dewatering yog hais txog kev tshem tawm cov dej ntau dhau ntawm cov sludge uas tsim thaum lub sij hawm kho dej khib nyiab, txo qhov ntim ntawm cov sludge thiab txhim kho nws txoj kev ruaj ntseg rau kev nyab xeeb thiab rov ua dua tshiab. Feem ntau sludge dewatering txoj kev muaj xws li ntuj dewatering, lim xovxwm, centrifugal dewatering, siv lim xovxwm, phaj thiab ncej lim xovxwm, ntsia hlau dewatering, thiab cua ntws dewatering, thiab lwm yam. Siab pom, ntawm qhov tod tes, yog ib txoj hauv kev zoo dua thiab siv dav, haum rau sludge nrog compressibility zoo. Nws tuaj yeem ua tiav qhov dewatering ntawm ntau cov sludge ntawm tus nqi qis. Centrifugal dewatering tuaj yeem ua haujlwm siab -sludge sludge thiab muaj kev ua haujlwm ceev ceev. Siv lim xovxwm yog tsim nyog rau dewatering tshwj xeeb tuab sludge los yog sludge nrog ib tug loj npaum li cas ntawm tsawg -concentration particulate teeb meem.
Lub ntsiab teeb meem thiab teeb meem gases nyob rau hauv lub sludge dewatering cheeb tsam ntawm ib tug dej phwj kho nroj tsuag yog raws li nram no:
1. Hydrogen sulfide
Nyob rau hauv ib txwm kub thiab siab, nws yog ib tug tsis muaj kob roj nrog ib tug tsis hnov tsw ntawm cov qe lwj. Nws yog tshuaj lom heev thiab muaj zog neurotoxin uas muaj qhov ua rau muaj zog ntawm cov mucous membranes. Hydrogen sulfide yog ib qho tshuaj lom neeg mob. Kev nqus tau me me ntawm qhov siab - concentration hydrogen sulfide tuaj yeem ua rau tuag nyob rau lub sijhawm luv luv. Tsawg concentrations ntawm hydrogen sulfide muaj feem xyuam rau lub qhov muag, ua pa system thiab hauv nruab nrab paj hlwb.
2. Methane
Methane yog ib qho hluav taws kub thiab tawg. Thaum sib xyaw nrog huab cua, nws tuaj yeem tsim qhov sib xyaw tawg nrog qhov txwv tsis pub tawg ntawm 5.0% txog 15.4% VOL. Thaum lub concentration ntawm methane nyob rau hauv lub ambient huab cua nyob rau hauv lub cheeb tsam no, qhov tawg yuav tshwm sim thaum ntsib qhib nplaim taws, hluav taws xob arcs, sparks, kub kub, thiab lwm yam. Methane muaj tsawg heev toxicity. "Methane lom" tshwm sim los ntawm kev raug rau siab concentration ntawm methane yog tiag tiag asphyxiation vim oxygen deficiency tshwm sim los ntawm ib tug kuj txo oxygen cov ntsiab lus nyob rau hauv cov huab cua. Nws muaj cov nyhuv asphyxiating yooj yim thiab tuaj yeem ua rau muaj tshuaj lom vim asphyxiation tshwm sim los ntawm hypoxia ntawm qhov siab. kiv taub hau, ua pa nrawm nrawm thiab kev txav tsis zoo tshwm sim thaum huab cua concentration nce mus txog 25 txog 30 feem pua.
3. Ammonia
Nws yog tshuaj lom. Cov concentrations tsawg tuaj yeem ua rau lub qhov muag thiab ua pa ua pa, thaum lub siab siab tuaj yeem ua rau lub ntsws edema thiab txawm tuag. Flammable thiab tawg. Nws yuav tawg thaum sib xyaw nrog huab cua ntawm qhov concentration ntawm 15.5% mus rau 27% thiab raug rau cov nplaim taws qhib. Qhov siab tshaj plaws tso cai ntawm ammonia hauv huab cua yog 30mg / m³ (kwv yees li 39.5ppm).
Cov khoom siv hluav taws xob ruaj khov hauv online muaj tshuaj lom thiab teeb meem roj tshawb nrhiav thiab lub tswb ntsuas tsim los ntawm peb lub tuam txhab tuaj yeem tshawb pom thiab nthuav tawm cov txiaj ntsig ntawm hydrogen sulfide thiab biogas (methane), thiab yuav suab thiab lub teeb ceeb toom thaum cov pa roj concentration ntau tshaj li tus qauv. Lub relay tso zis teeb liab ntawm cov roj tswj txee yog interlocked kom tswj tau qhov pib thiab nres ntawm lub kiv cua, kom muaj kev ruaj ntseg ntawm cov neeg ua hauj lwm thiab cov khoom.