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Qhov teeb meem ua npuas dej hauv kev kho dej tau ua rau ntau tus neeg xav tsis thoob. Nyob rau hauv thawj theem ntawm commissioning, ua npuas ncauj, surfactant ua npuas ncauj, cuam tshuam ua npuas ncauj, peroxide ua npuas ncauj, ua npuas ncauj generated los ntawm kev ntxiv uas tsis yog-oxidizing bactericide nyob rau hauv circulating dej kev kho mob, thiab lwm yam. Kab lus no qhia meej txog lub hauv paus ntsiab lus, kev faib tawm, kev xaiv thiab ntau npaum li cas ntawm defoamer!

★ Tshem tawm ua npuas ncauj

1. Cov txheej txheem ntawm lub cev

Los ntawm qhov pom ntawm lub cev, txoj hauv kev los tshem tawm cov npuas dej feem ntau suav nrog kev tso cov baffle lossis lim tshuaj, cov tshuab ua kom muaj zog, hluav taws xob zoo li qub, khov, cua sov, chav dej, hluav taws xob irradiation, high-speed centrifugation, txo qis, siab zaus vibration, instantaneous paug. thiab ultrasonic (acoustic kua tswj). Cov txheej txheem no txhua tus txhawb nqa cov pa xa hluav taws xob ntawm ob qho kawg ntawm cov yeeb yaj kiab ua kua thiab cov kua dej tawm ntawm cov yeeb yaj kiab npuas mus rau qhov sib txawv, ua rau qhov kev ruaj ntseg ntawm cov npuas dej tsawg dua qhov attenuation factor, kom cov npuas maj mam txo. Txawm li cas los xij, qhov tsis zoo ntawm cov txheej txheem no yog tias lawv raug txwv los ntawm ib puag ncig thiab muaj tus nqi defoaming tsawg. Qhov zoo yog kev tiv thaiv ib puag ncig thiab rov siv dua tus nqi siab.

2. Cov txheej txheem tshuaj

Cov txheej txheem tshuaj los tshem tawm ua npuas ncauj feem ntau suav nrog cov tshuaj tiv thaiv kab mob thiab ntxiv defoamer.

Cov tshuaj tiv thaiv kab mob yog hais txog cov tshuaj tiv thaiv ntawm tus neeg sawv cev foaming thiab tus neeg sawv cev foaming los ntawm kev ntxiv qee cov reagents los tsim cov dej insoluble tshuaj, yog li txo cov concentration ntawm surfactant nyob rau hauv cov kua zaj duab xis thiab txhawb lub rupture ntawm ua npuas ncauj. Txawm li cas los xij, txoj kev no muaj qee qhov tsis txaus, xws li qhov tsis paub tseeb ntawm tus neeg sawv cev foaming muaj pes tsawg leeg thiab kev puas tsuaj ntawm cov khoom tsis zoo rau cov khoom siv. Txoj kev siv defoaming ntau tshaj plaws hauv ntau qhov kev lag luam niaj hnub no yog txoj kev ntxiv defoamers. Qhov zoo tshaj plaws ntawm txoj kev no yog nws qhov kev ua haujlwm siab defoaming thiab yooj yim ntawm kev siv. Txawm li cas los xij, nrhiav qhov tsim nyog thiab ua tau zoo defoamer yog qhov tseem ceeb.

★ Lub hauv paus ntsiab lus ntawm defoamer

Defoamers, tseem hu ua defoamers, muaj cov hauv qab no:

1. Lub tshuab ua npuas dej hauv zos qhov nro txo ​​qhov ua rau ua npuas ncauj tawg yog tias cov dej cawv ntau dua lossis cov roj zaub tau nchuav rau ntawm cov npuas dej, thiab thaum yaj ua npuas dej, qhov nro ntawm qhov chaw yuav txo qis. Vim tias cov khoom no feem ntau muaj cov dej solubility tsawg, qhov txo qis ntawm qhov nro yog txwv rau hauv ib cheeb tsam ntawm cov npuas dej, thaum qhov nro ntawm cov npuas dej yuav luag tsis hloov. Ib feem nrog txo qhov nro yog rub tawm thiab txuas ntxiv mus rau txhua qhov kev qhia, thiab thaum kawg tawg.

2. Kev puas tsuaj ntawm daim nyias nyias elasticity ua rau cov npuas tawg defoamer ntxiv rau hauv qhov ua npuas ncauj, uas yuav diffuse rau cov roj-kua interface, ua rau nws nyuaj rau cov surfactant nrog foam stabilizing nyhuv kom rov qab tau cov membrane elasticity.

3. Defoamers uas txhawb cov kua zaj duab xis kua yuav txhawb cov kua zaj duab xis kua, yog li ua npuas ncauj tawg. Cov npuas dej tus nqi tuaj yeem cuam tshuam qhov kev ruaj ntseg ntawm npuas. Ntxiv cov khoom uas ua kom cov npuas dej tuaj yeem ua lub luag haujlwm hauv defoaming.

4. Ntxiv cov khoom siv hydrophobic tuaj yeem ua rau cov npuas tawg rau ntawm cov npuas. Cov khoom siv hydrophobic nyiam qhov kawg ntawm hydrophobic surfactant, ua rau hydrophobic hais hydrophilic thiab nkag mus rau theem dej, yog li ua lub luag haujlwm hauv defoaming.

5. Solubilizing thiab foaming surfactants tuaj yeem ua rau npuas tawg. Qee cov khoom hnyav molecular uas tuaj yeem sib xyaw nrog cov tshuaj tuaj yeem solubilize cov surfactant thiab txo nws cov concentration. Tsawg molecular tshuaj nrog cov nyhuv no, xws li octanol, ethanol, propanol thiab lwm yam cawv, tuaj yeem tsis tsuas yog txo cov surfactant concentration nyob rau hauv txheej txheej, tab sis kuj yaj mus rau hauv cov surfactant adsorption txheej, txo cov compactness ntawm surfactant molecules, yog li tsis muaj zog stability. ntawm ua npuas ncauj.

6.Electrolyte breakdown surfactant ob chav hluav taws xob txheej plays lub luag hauj lwm defoaming nyob rau hauv kev sib cuam tshuam ntawm surfactant ob chav hluav taws xob txheej nrog ua npuas ncauj los ua kom ruaj khov foaming kua. Ntxiv cov electrolyte zoo tib yam tuaj yeem tsoo cov surfactant ob txheej hluav taws xob.

★ Kev faib tawm ntawm defoamers

Feem ntau siv defoamers tuaj yeem muab faib ua silicone (resin), surfactant, alkane, thiab ntxhia roj raws li lawv muaj pes tsawg leeg.

1. Silicone (resin) defoamers, tseem hu ua emulsion defoamers, yog siv los ntawm emulsifying thiab dispersing silicone resin nrog emulsifiers (surfactants) hauv dej ua ntej ntxiv rau cov dej khib nyiab. Silicon dioxide hmoov zoo yog lwm hom silicon-based defoamer nrog cov nyhuv defoaming zoo dua.

2. Surfactants xws li defoamers yog tiag tiag emulsifiers, uas yog, lawv siv cov dispersion ntawm surfactants kom ua npuas ncauj tsim tshuaj nyob rau hauv ib tug ruaj khov emulsified lub xeev nyob rau hauv dej, thiaj li tsis txhob tsim ntawm npuas.

3. Alkane raws li defoamers yog defoamers ua los ntawm emulsifying thiab dispersing paraffin ciab los yog nws derivatives siv emulsifiers. Lawv siv zoo ib yam li cov surfactant raws li emulsifying defoamers.

4.Mineral roj yog lub ntsiab defoaming tivthaiv. Txhawm rau txhim kho cov nyhuv, qee zaum hlau xab npum, silicone roj, silica thiab lwm yam khoom siv sib xyaw ua ke rau kev siv. Tsis tas li ntawd, qee zaum muaj ntau yam surfactants tuaj yeem ntxiv los pab txhawb kev sib txawv ntawm cov roj ntxhia mus rau saum npoo ntawm cov tshuaj foaming lossis kom sib npaug ntawm cov tshuaj soaps thiab lwm yam khoom hauv cov roj ntxhia.
★ Qhov zoo thiab qhov tsis zoo ntawm ntau hom defoamers

Kev tshawb fawb thiab kev siv cov organic defoamers xws li cov roj ntxhia, amides, qis cawv, fatty acids thiab fatty acid esters, phosphate esters, thiab lwm yam yog qhov ntxov thiab muaj nyob rau thawj tiam ntawm defoamers. Lawv muaj qhov zoo ntawm qhov yooj yim ntawm cov khoom siv raw, kev ua haujlwm siab ib puag ncig, thiab cov nqi tsim khoom tsawg; Qhov tsis zoo yog qhov ua haujlwm tsis zoo, muaj zog tshwj xeeb, thiab kev siv hnyav.

Polyether defoamers yog thib ob tiam defoamers, feem ntau suav nrog cov hlua ncaj nraim polyethers, polyethers pib los ntawm cawv los yog ammonia, thiab polyether derivatives nrog kawg pab pawg esterification. Qhov zoo tshaj plaws ntawm polyether defoamers yog lawv lub peev xwm los tiv thaiv foaming. Tsis tas li ntawd, qee qhov polyether defoamers kuj muaj cov khoom zoo heev xws li kub tsis kam, muaj zog acid thiab alkali tsis kam; Qhov tsis zoo yog txwv los ntawm qhov kub thiab txias, qhov chaw siv nqaim, tsis muaj peev xwm defoaming, thiab cov npuas tawg tsawg.

Organic silicone defoamers (tiam thib peb defoamers) muaj zog defoaming kev ua tau zoo, sai defoaming muaj peev xwm, tsis tshua muaj volatility, tsis muaj toxicity rau ib puag ncig, tsis muaj physiological inertia, thiab ntau yam kev siv. Yog li ntawd, lawv muaj kev cia siab rau kev thov dav dav thiab kev ua lag luam loj, tab sis lawv cov kev ua haujlwm tsis zoo.

Polyether hloov kho polysiloxane defoamer muab cov txiaj ntsig zoo ntawm ob qho tib si polyether defoamers thiab organosilicon defoamers, thiab yog txoj kev loj hlob ntawm defoamers. Qee zaum nws tuaj yeem rov qab siv tau raws li nws qhov rov qab solubility, tab sis tam sim no muaj ob peb hom defoamers thiab lawv tseem nyob rau hauv kev tshawb fawb thiab kev loj hlob theem, uas ua rau cov nqi ntau lawm.

★ Xaiv cov defoamers

Kev xaiv ntawm defoamers yuav tsum ua raws li cov hauv qab no:

1. Yog hais tias nws yog insoluble los yog insoluble nyob rau hauv cov tshuaj foaming, nws yuav ua rau cov npuas dej tawg. Lub defoamer yuav tsum tau concentrated rau ntawm daim duab ua npuas ncauj. Rau defoamers, lawv yuav tsum tau concentrated thiab concentrated nyob rau hauv ib qho instant, thaum ua npuas ncauj suppressants, lawv yuav tsum tau khaws cia nyob rau hauv lub xeev no tsis tu ncua. Yog li defoamers nyob rau hauv lub xeev supersaturated nyob rau hauv cov kua foaming, thiab tsuas yog insoluble los yog tsis zoo soluble sawv daws yuav mus cuag supersaturation. Insoluble los yog tsis yooj yim rau yaj, nws yog ib qho yooj yim rau aggregate ntawm cov roj-kua interface, yooj yim rau kev mloog zoo ntawm cov npuas membrane, thiab muaj peev xwm ua hauj lwm ntawm qis concentrations. Lub defoamer siv nyob rau hauv cov dej systems, cov active ingredient molecules, yuav tsum tau muaj zog hydrophobic thiab tsis muaj zog hydrophilic, nrog ib tug HLB tus nqi nyob rau hauv ntau ntawm 1.5-3 rau qhov zoo tshaj plaws nyhuv.

2. Qhov nro saum npoo yog qis dua li ntawm cov kua foaming, thiab tsuas yog thaum lub zog ntawm cov defoamer me me thiab qhov nro ntawm qhov qis qis dua li ntawm cov kua foaming, cov defoamer tuaj yeem nkag mus thiab nthuav dav ntawm cov yeeb yaj kiab ua npuas ncauj. Nws yog tsim nyog sau cia tias qhov nro ntawm cov tshuaj foaming tsis yog qhov nro ntawm cov tshuaj, tab sis qhov nro ntawm cov tshuaj foaming.

3. Muaj qee qhov kev sib raug zoo nrog cov kua foaming. Raws li cov txheej txheem defoaming tiag tiag yog kev sib tw ntawm cov npuas dej nrawm thiab cov npuas tsim ceev, cov defoamer yuav tsum muaj peev xwm tawg sai sai hauv cov kua foaming kom sai ua lub luag haujlwm hauv ntau hom foaming kua. Ua kom lub defoamer diffuse sai sai, cov khoom xyaw nquag ntawm defoamer yuav tsum muaj qee qhov kev sib raug zoo nrog cov tshuaj foaming. Cov khoom xyaw nquag ntawm defoamers yog ze rau cov dej ua npuas dej thiab yuav yaj; sparse heev thiab nyuaj rau disperse. Tsuas yog thaum qhov kev sib raug zoo tsim nyog tuaj yeem ua tau zoo.

4. Defoamers tsis raug tshuaj lom neeg nrog cov kua foaming. Thaum defoamers hnov ​​​​mob nrog cov kua ua npuas dej, lawv poob lawv cov txiaj ntsig thiab tuaj yeem tsim cov khoom tsis zoo uas cuam tshuam rau kev loj hlob ntawm microbial.

5.Low volatility thiab ntev ntawm kev txiav txim. Ua ntej, nws yog ib qho tsim nyog los txiav txim siab seb qhov system uas yuav tsum tau siv cov defoamers yog dej los yog roj. Hauv kev lag luam fermentation, roj-raws li defoamers xws li polyether hloov silicone los yog polyether raws li yuav tsum tau siv. Kev lag luam txheej txheej dej yuav tsum muaj dej-raws li defoamers thiab organic silicon defoamers. Xaiv cov defoamer, sib piv cov nyiaj ntxiv, thiab raws li tus nqi siv, txiav txim siab qhov tsim nyog tshaj plaws thiab kev lag luam defoamer khoom.

★ Yam cuam tshuam rau kev ua tau zoo ntawm kev siv defoamer

1. Lub dispersibility thiab nto thaj chaw ntawm defoamers nyob rau hauv cov tshuaj ho cuam tshuam rau lwm yam defoaming zog. Defoamers yuav tsum muaj qhov tsim nyog ntawm kev tawg, thiab cov khoom uas loj dhau los yog me me dhau los tuaj yeem cuam tshuam rau lawv cov haujlwm defoaming.

2. Compatibility ntawm defoamer nyob rau hauv ua npuas ncauj system Thaum lub surfactant yog kiag li yaj nyob rau hauv aqueous tov, nws yog feem ntau directionally teem rau lub gas-kua interface ntawm ua npuas ncauj kom stabilize ua npuas ncauj. Thaum cov surfactant nyob rau hauv insoluble los yog supersaturated lub xeev, cov hais disperse nyob rau hauv cov tshuaj thiab accumulates nyob rau hauv ua npuas ncauj, thiab ua npuas ncauj ua raws li defoamer.

3. Qhov kub thiab txias ntawm lub tshuab foaming thiab qhov kub ntawm cov kua foaming kuj tuaj yeem cuam tshuam rau kev ua haujlwm ntawm lub defoamer. Thaum qhov kub ntawm cov kua foaming nws tus kheej yog qhov siab, nws raug nquahu kom siv tshwj xeeb kub resistant defoamer, vim hais tias yog siv cov defoamer zoo tib yam, cov nyhuv defoaming yuav raug txo kom tsawg, thiab cov defoamer yuav ncaj qha demulsify cov tshuaj pleev ib ce.

4. Kev ntim khoom, kev cia khoom, thiab kev thauj mus los ntawm defoamers yog tsim rau kev khaws cia ntawm 5-35 ℃, thiab lub txee lub neej feem ntau yog 6 lub hlis. Tsis txhob muab tso rau ntawm qhov chaw tshav kub los yog nthuav tawm rau hnub ci. Raws li kev siv tshuaj khaws cia, xyuas kom sealing tom qab siv kom tsis txhob deterioration.

6.Qhov sib ntxiv ntawm defoamers rau thawj cov tshuaj thiab cov tshuaj diluted muaj qee qhov sib txawv rau qee qhov, thiab qhov piv tsis sib npaug. Vim tias tsis tshua muaj siab ntawm surfactant, diluted defoamer lotion yog qhov tsis ruaj khov thiab yuav tsis delaminate sai. Lub defoaming kev ua tau zoo kuj tsis zoo, uas tsis haum rau kev khaws cia ntev. Nws raug nquahu kom siv tam sim ntawd tom qab dilution. Qhov kev faib ua feem ntawm defoamer ntxiv yuav tsum tau txheeb xyuas los ntawm kev sim ntawm qhov chaw los ntsuas nws cov txiaj ntsig, thiab yuav tsum tsis txhob ntxiv ntau dhau.

★ Qhov ntau npaum ntawm defoamer

Muaj ntau ntau hom defoamers, thiab qhov xav tau ntau npaum li cas rau ntau hom defoamers txawv. Hauv qab no, peb yuav qhia txog qhov ntau npaum li cas ntawm rau hom defoamers:

1. Cawv defoamer: Thaum siv cawv defoamers, qhov ntau npaum li cas ntawm 0.01-0.10%.

2. Cov roj raws li defoamers: Cov roj raws li defoamers ntxiv yog nyob nruab nrab ntawm 0.05-2%, thiab cov roj fatty acid ester defoamers ntxiv yog nyob nruab nrab ntawm 0.002-0.2%.

3. Amide defoamers: Amide defoamers muaj txiaj ntsig zoo dua, thiab qhov sib ntxiv yog feem ntau nyob rau hauv 0.002-0.005%.

4. Phosphoric acid defoamer: Phosphoric acid defoamers feem ntau yog siv nyob rau hauv fibers thiab lubricating roj, nrog ib tug ntxiv ntawm 0.025-0.25%.

5. Amine defoamer: Amine defoamers feem ntau yog siv hauv kev ua fiber ntau, nrog rau qhov ntxiv ntawm 0.02-2%.

7.Ether raws li defoamers: Ether raws li defoamers feem ntau yog siv rau hauv ntawv luam ntawv, dyeing, thiab tu, nrog ib tug raug npaum li cas ntawm 0.025-0.25%.


Post lub sij hawm: Nov-14-2024