Flocculation
Hauv kev teb cov txheej txheem Chemistry, yog cov txheej txheem los ntawm cov khoom colloidal uas los ntawm ib nag lossis flake daim ntawv los ntawm kev ncua lossis los ntawm kev sib ntxiv ntawm ib qho kev sib txuas. Tus txheej txheem no txawv ntawm nag lossis daus tsuas yog ncua hauv cov kua uas yog cov dispersion ruaj khov ua ntej flocculation thiab tsis yog tiag tiag yaj nyob rau hauv kev daws.
Coagulation thiab flocculation yog cov txheej txheem tseem ceeb hauv kev kho dej. Qhov kev txiav txim siab sib nqus yog txoj sia ntawm cov khoom siv sib xyaw los ntawm kev sib cuam tshuam ntawm kev sib xyaw ua ke ntawm cov sib xyaw ua ke thiab khov thiab ua pa tawm ntawm cov nplais uas tsis khov los ntawm cov coagulating los ntawm coagulating lawv nyob rau hauv flocculation.
Lub Sij Hawm Txhais
Raws li Iupac, flocculation yog "tus txheej txheem ntawm kev sib cuag thiab kev sib cuag uas hais ntawm daim ntawv dispersion ntawm qhov loj me me".
Yeej, flocculation yog tus txheej txheem ntawm kev ntxiv cov flocculant rau txoj kev ua kom cov khoom siv tsis tau zoo. Nyob rau tib lub sijhawm, flocculation yog cov txheej txheem sib xyaw uas txhawb agglomeration thiab pab txhawb rau kev sib hais haum rau particle. Cov feem ntau cov coagulant yog Al2 (so4) 3 • 14h2o.
Daim Ntawv Thov Teb
Dej Kho Tshuab
Flocculation thiab nag lossis daus tau siv nyob rau hauv kev huv huv ntawm cov dej haus thiab hauv kev kho mob ntawm dej phwj tuaj thiab dej daj cua nab. Cov txheej txheem kho cov txheej txheem suav nrog cov gratings, coagulation, flocculation, nag lossis daus, particle particle.
Nto Chemistry
Nyob rau hauv chemoroidal chemistry, flocculation yog tus txheej txheem los ntawm cov khoom zoo yog clumped ua ke. Cov floc yuav ces ntab rau sab saum toj ntawm cov kua (opalescent), khom rau hauv qab cov kua (precipalate) lossis yooj yim lim tawm ntawm cov kua. Lub flocculation kev coj ntawm cov av colloid yog ze rau cov khoom noj tshiab. Lub siab dispersion ntawm cov av colloid tsis tsuas yog ua rau cov dej khov ntawm cov dej hiav txwv vim tias cov as-ham hauv dej ntws, pas dej thiab txawm tias submarine hull.
Chemistry
Rau emulsions piav qhia txog kev sib sau sib sau ntawm ib leeg displaste dropaste kom cov mob ib leeg tsis poob lawv cov khoom. Yog li, flocculation yog thawj kauj ruam (operet coalescence thiab kawg theem sib cais) uas ua rau kev laus ntxiv ntawm emulsion. Flocculants siv hauv cov ntxhia tau txais txiaj ntsig, tab sis kuj tseem siv tau rau hauv cov khoom siv lub cev ntawm cov zaub mov thiab tshuaj.
Deflocculate
Thim rov qab flocculation yog qhov sib txawv ntawm flocculation thiab qee zaum hu ua gelling. Sodium silicate (na2sio3) yog ib qho piv txwv. Cov colloidal yog feem ntau dispersed nyob rau ntau dua yuav tsum muaj lub zog ntau dua, tshwj tsis yog rau cov kev daws teeb meem thiab kev daws teeb meem ntawm cov tsiaj roj av monovalent. Cov tshuaj ntxiv uas tiv thaiv kev sib xyaw los ntawm kev tsim cov flocculent yog hu ua antiflocculants. Rau thim rov qab los ntawm electrostatic teeb meem, cov nyhuv ntawm kev thim rov qab flocculant tuaj yeem ntsuas los ntawm Zeta Peev Xwm. Raws li phau ntawv txhais lus encyclopedia ntawm polymers, antiflocculation yog "ib lub xeev lossis lub xeev ntawm cov khoom nyob hauv uas txhua tus neeg nyob sib ze (ntau zoo li emulsifier). Tsis-flocculating kev ncua ntawv muaj xoom lossis tsawg heev cov txiaj ntsig tseem ceeb ".
Thim rov qab flocculation tuaj yeem muaj teeb meem hauv cov ntoo dej phwj tuaj raws li nws feem ntau ua rau sludge daws teeb meem kev teeb meem thiab detheration ntawm effluent zoo.
Lub sij hawm ncua: Mar-03-2023