Hauv kev tsim khoom lag luam, cov khoom pov tseg emulsions yog inevitably generated thaum lub sij hawm machining, hlau tu, thiab txiav lubrication txheej txheem. Ib txwm siv tshuaj demulsification ua raws li kev kho mob biochemical yog dav siv tab sis muaj qhov tsis zoo xws li kev siv tshuaj lom neeg siab, kev ua qias tuaj nruab nrab, thiab cov nqi khiav lag luam siab. Nrog rau kev nce qib ntawm cov txheej txheem sib cais membrane, tshwj xeeb ultrafiltration membranes tau tshwm sim los ua kev daws teeb meem rau kev kho cov khib nyiab emulsion.
1. Kev hloov ntawm "Chemical Demulsification" mus rau "Lub cev sib cais"
Feem ntau cov kev kho mob hauv tsev emulsion tseem cia siab rau tshuaj demulsification los ntawm kev kho pH lossis ntxiv PAC thiab PAM cais cov roj thiab dej. Txawm li cas los xij, txoj hauv kev no ua rau ntau cov tshuaj sludge thiab cov khib nyiab txaus ntshai, thaum ua rau cov nqi reagent siab.
Los ntawm kev siv lub Dutch B&C tshwj xeeb ultrafiltration membrane, tshiab "membrane concentration + lub cev demulsification + puag roj rov qab" txheej txheem ua tiav cov theem sib cais yam tsis muaj tshuaj ntxiv. Cov ntaub ntawv siv tau qhia tias:
- Rau cov khib nyiab emulsions nrog roj cov ntsiab lus ntawm 1-3%, cov kua concentrated tom qab membrane sib cais mus txog 15-20% roj cov ntsiab lus;
- Lub ultrafiltration permeate muaj roj cov ntsiab lus hauv qab 50 mg / L thiab COD ntawm 15,000-20,000 mg / L;
- Tom qab tom qab anaerobic-A/O-MBR lom thiab Fenton oxidation kev kho mob, cov effluent COD tuaj yeem txo qis dua 500 mg / L, ua raws li cov qauv siv rov qab.
Qhov no "hloov cov tshuaj nrog daim nyias nyias" txoj hauv kev tsis yog tsuas yog txo qis cov pov tseg uas muaj kev phom sij tab sis kuj txo qis cov pa roj carbon monoxide tag nrho.
2. Kev sib koom ua ke thiab siab -Kev Tsim Qauv Txheej Txheem
Cov txheej txheem muaj tsib theem: pretreatment, tshwj xeeb ultrafiltration membrane sib cais, anaerobic lom kev kho mob, A / O + MBR lom kev kho mob, thiab advanced oxidation (Fenton).
- Pretreatment: Cov roj sib cais tank thiab grating tshem tawm cov roj ntab thiab cov khib nyiab tshem tawm kom ntseeg tau tias muaj zog ruaj khov rau cov txheej txheem membrane.
- Ultrafiltration theem: Siv cov organic sib xyaw membrane nrog tus tsim flux ntawm 50 L / m²·h, lub kaw lus ua haujlwm hauv cov voj voog kom ua tiav cov concentration thiab demulsification.
- Kev kho mob lom: UASB + MBR ua ke txhim kho biodegradation ntawm siab -COD cov dej khib nyiab.
- Terminal Oxidation: Cov txheej txheem Fenton ntxiv tshem tawm cov organic refractory, ua kom cov dej zoo tsim nyog rau rov siv dua.
Qhov kev sib xyaw ua ke no- sib txuas ua ke membrane ua ntej- kho, txhim kho bioprocessing, thiab sib sib zog nqus oxidation-embodies ib tug pem hauv ntej- saib tsim lub tswv yim rau kev lag luam dej khib nyiab.
3. Kev paub txog kev ua haujlwm thiab kev saib xyuas
Kev paub txog kev ua haujlwm qhia tau hais tias emulsion concentration cuam tshuam rau cov membrane flux. Thaum cov concentration qis dua 5%, qhov flux tseem nyob siab dua 50 L / m²·h, tab sis nws maj mam txo qis thaum concentration nce. Kev tu tshuaj tsis tu ncua (txhua 1-2 lub lis piam) rov ua kom cov dej ntws tawm thiab ua rau lub neej ntev li ntawm 2.5 xyoo.
Txawm li cas los xij, qhov nyuaj ntawm cov emulsifiers tshiab hauv cov txheej txheem machining tau ua rau qee qhov emulsions ruaj khov thiab nyuaj rau tawg. Hauv cov xwm txheej zoo li no, cov khoom siv evaporative siv los txhim kho cov roj rov qab, qhia qhov xav tau rau yav tom ntej daim nyias nyias nrog zoo dua los tiv thaiv -fouling thiab anti- emulsifier zog.
4. Ua tiav Ob qho txiaj ntsig kev lag luam thiab ib puag ncig
Hauv qhov chaw kho cov pov tseg uas muaj kev phom sij tuav 25,000 tons ntawm cov khib nyiab emulsion ib xyoos ib zaug, daim nyias nyias no - raws li cov txheej txheem tau ua kom pom cov nqi qis dua piv nrog cov tshuaj demulsification. Cov roj rov qab thiab cov dej rov qab siv tau ua rau muaj kev kaw - lub voj voog rov ua dua tshiab, txo cov peev txheej tag nrho.
Tsis tas li ntawd, cov txheej txheem tshem tawm kev siv tshuaj lom neeg thiab kev pov tseg sludge, txo qis qis CO₂ emissions thiab ua kom muaj txiaj ntsig ntawm ib puag ncig thiab koom nrog hauv zej zog.
YIME ntseeg hais tias nrog rau thaj chaw ntawm cov ntaub ntawv tshwj xeeb membrane thiab kev nce qib hauv multiphase membrane reactor systems, kev kho cov emulsion pov tseg yuav ua tiav kev siv hluav taws xob tsawg, kev rov zoo siab, thiab ze rau - xoom paug, qhib qhov kev loj hlob tshiab rau kev ua hlau thiab kev lag luam pov tseg pov tseg.
