Ilana, ohun elo ati ọna igbelewọn ti ifihan defoamer

Ni iṣelọpọ ile-iṣẹ ati igbesi aye ojoojumọ, nitori ọpọlọpọ awọn idi yoo mu nọmba nla ti foomu, awọn ohun-ini ti awọn ohun elo ti o dara ti a mọ ni aṣoju foaming.Some surfactants anionic gẹgẹbi sodium fatty acid, sodium alkyl benzene sulfonate ati sodium alkyl sulfate ni o dara. Awọn ohun-ini foaming.O yẹ ki o ṣe akiyesi pe aṣoju ifofo nikan labẹ awọn ipo kan (safikun, fentilesonu, bbl) lati ni iṣẹ ṣiṣe ti o dara, dida foomu le ma jẹ ti o tọ.Gbogbogbo soro, eyikeyi aṣoju ifofo ti o le dinku ẹdọfu dada ti omi ati ki o mu agbara fiimu naa ni agbara ifofo ti o ga julọ, laibikita boya foomu ti a ti ipilẹṣẹ jẹ iduroṣinṣin tabi rara.Ninu iwe yii, foomu ati ilana imuduro rẹ, ọna imukuro foomu ti wa ni akopọ ni awọn apejuwe, ati ọna ṣiṣe ati ọna igbelewọn iṣẹ. defoaming oluranlowo ti wa ni a ṣe.

aworan 12-17

1 Foam stability principleThe study of foam can be traced back to Plato’s time, but the definition of foam has not been unified for hundreds of years.American colloidal chemists l.i.ossipow and r.f.smith of dow corning defined foam in terms of its density;In Japan, koichi ITO defined foam from the perspective of foam structure, but ignored the interrelation between bubbles.The surface of the famous physicist professor zhao of foam is defined as: bubble is dispersed in the liquid gas dispersion system, gas is dispersed phase (discontinuous phase), liquid is dispersive medium (continuous phase), bubbles rise to the level of the liquid, separated with liquid membrane formation consisting of a small amount of liquid gas bubbles aggregates.At present, scholars at home and abroad agree that foam itself is a thermodynamic unstable system. When the gas enters the solution containing surfactant, the foam system will be stable for a long time.

1.1 Awọn attenuation siseto ti

Labẹ iṣẹ apapọ ti walẹ ati iyatọ titẹ, fiimu olomi foomu yoo ṣan ni aiṣedeede lati fa omi naa, ati gaasi ti o ti nkuta yoo tan kaakiri nigbagbogbo ati permeate nitori iyatọ titẹ laarin awọn ẹgbẹ mejeeji ti fiimu ti nkuta. Awọn aisedeede ti foomu wa ni o kun reflected lati irisi ti dynamics.The attenuation siseto o kun pẹlu meji ise: gaasi itankale nipasẹ omi fiimu ati omi bibajẹ film idominugere. Awọn ohun-ini meji wọnyi jẹ awọn ohun-ini inherent ti foomu funrararẹ ati pe ko ni nkankan lati ṣe pẹlu wiwa tabi isansa ti awọn surfactants.Itan kaakiri Gas nipasẹ fiimu omi ati ṣiṣan omi ṣiṣan omi nikan ni ipa ti o han gbangba ni ipele ibẹrẹ ti iṣeto ti eto foomu. Pẹlu idinku ti eto foomu, awọn iṣẹ meji wọnyi di irẹwẹsi, ṣiṣe iwọn ibajẹ foomu maa fa fifalẹ.

1.2 Idurosinsin ifosiwewe

Bubble jẹ idi taara ti nitori surfactant lati dinku ẹdọfu dada ti ojutu, iduroṣinṣin ti eto foomu oriṣiriṣi fihan iyatọ, awọn ifosiwewe ipa akọkọ pẹlu: iki foaming ojutu, ẹdọfu dada, iki oju oju oju foam, ẹdọfu dada ti atunṣe ara ẹni. iṣẹ (ie, Gibbs dada elasticity ati Ma – rangoni ipa), omi awo membran dada ina ė Layer repulsion repulsion ati entropy, surfactant hydrophobic be, aaye steric ipa ati be be lo.The akọkọ ifosiwewe ti o ni ipa awọn iduroṣinṣin ti foomu ti o yatọ si ni orisirisi awọn foomu awọn ọna šiše. .Ni afikun si awọn okunfa ti o wa loke, iwọn foomu, iwọn otutu, pH, oṣuwọn evaporation epo, iwọn ikolu ti foomu ati oṣuwọn adsorption surfactant yoo tun ni ipa lori iduroṣinṣin foomu.

2 Foam elimination method

2.1 Awọn ọna ti ara

Awọn ọna ti ara ni akọkọ pẹlu baffle ti a gbe tabi apapo, gbigbọn darí, elekitirotatiki, firiji, alapapo, ti o npese nya si, itankalẹ, centrifugal iyara giga, iderun titẹ, gbigbọn igbohunsafẹfẹ giga, itusilẹ lẹsẹkẹsẹ ati olutirasandi (iṣakoso olomi akositiki) ati bẹbẹ lọ, awọn ọna wọnyi si yatọ si iye igbega awọn omi fiimu lori mejeji opin ti awọn nipasẹ oṣuwọn ati ti awọn gaasi o ti nkuta film idominugere, awọn foomu iduroṣinṣin ifosiwewe jẹ kere ju awọn attenuation ifosiwewe, ki awọn nọmba maa dinku.The alailanfani ti awọn wọnyi ọna ni wipe ti won ba wa ni strongly ni ihamọ nipasẹ awọn ifosiwewe ayika ati pe oṣuwọn defoaming ko ga.

2.2 Kemikali awọn ọna

Kemikali ọna o kun pẹlu kemikali lenu ọna ati fifi defoaming oluranlowo method.Chemical lenu ọna tumo si wipe nipa fifi reagents lati ṣe awọn ti o ati ki o foaming oluranlowo kemikali lenu, awọn Ibiyi ti omi insoluble oludoti, bayi atehinwa awọn fojusi ti surfactant ninu omi film, igbelaruge foomu. burst.Nitori pe akopọ ti oluranlowo foaming ko ni idaniloju, ọna ifasẹ kemikali yoo gbe awọn nkan ti ko ṣee ṣe, awọn alailanfani wa gẹgẹbi ipalara si ẹrọ. ga ṣiṣe ti defoaming, rọrun lati lo, ṣugbọn awọn bọtini ni lati wa awọn yẹ, daradara defoaming oluranlowo.

3 Type and application of defoaming agent

3.1 eya

Awọn aṣoju defoaming le pin si iru patiku to lagbara, iru emulsion, iru pipinka, iru epo ati iru awọn ẹka 5; Ni ibamu si ohun elo ni oriṣiriṣi iṣelọpọ ile-iṣẹ le pin si aṣoju defoaming ile-iṣẹ asọ, aṣoju defoaming ile-iṣẹ iwe, aṣoju defoaming ile-iṣẹ ti a bo , Onje ile ise defoaming oluranlowo ati epo ile ise defoaming oluranlowo; Ni ibamu si kemikali be ati tiwqn, o le wa ni pin si awọn erupe epo, oti, ọra acid ati ọra acid ester, amide, fosifeti ester, Organic silicon, polyether, polyether títúnṣe polysiloxane defoaming oluranlowo .

3.2 ohun elo

Awọn epo ti o wa ni erupe ile, amides, awọn oti kekere, awọn acids fatty ati awọn esters fatty acid, awọn esters fosifeti ati awọn aṣoju defoaming Organic miiran ni a ti lo ni iṣaaju, eyiti o jẹ ti iran akọkọ ti awọn aṣoju defoaming, eyiti o ni awọn anfani ti iraye si irọrun si awọn ohun elo aise, giga ayika. išẹ, kekere gbóògì iye owo ati be be lo.Polyether defoaming òjíṣẹ ni o wa keji iran ti defoaming òjíṣẹ, o kun pẹlu gbooro pq polyether, polyether ti o bere pẹlu oti tabi amonia, polyether awọn itọsẹ pẹlu opin-group esterification.Polyether defoaming òjíṣẹ wa ni o gbajumo ni lilo ninu ninu, sise iwe, bakteria ati awọn miiran ise. Awọn anfani ni o lagbara egboogi-foaming agbara, ati diẹ ninu awọn polyether defoaming òjíṣẹ ni o wa sooro si ga otutu, lagbara acid ati ki o lagbara alkali, ati be be lo. rate.Silicone defoaming agent (iran kẹta ti oluranlowo defoaming) jẹ ti girisi silikoni, emulsifier, thickener, bbl pẹlu iye ti o yẹ fun omi nipasẹ emulsification ẹrọ, awọn abuda ti o jẹ: kekere ẹdọfu, iṣẹ-ṣiṣe ti o ga, ti o lagbara. defoaming agbara, kekere doseji, kekere iye owo, julọ nkuta media le defoaming; O ni o ni o dara gbona iduroṣinṣin ati ki o le ṣee lo ni kan jakejado otutu range.Good kemikali iduroṣinṣin, le ṣee lo ni acid, alkali, iyọ ojutu.Organosilicon defoaming oluranlowo ni o ni awọn mejeeji. egboogi-foaming ati defoaming awọn iṣẹ lori gbogbo o ti nkuta awọn ọna šiše, ati ki o je ti awọn gbooro-julọ.Oniranran defoaming oluranlowo.O ti wa ni o gbajumo ni lilo ninu awọn Epo ile ise fun. desulfurization ti gaasi adayeba, isare ti epo ati gaasi Iyapa, gbigbe ti ethylene glycol, isediwon ti aromatic hydrocarbons, processing ti idapọmọra, dewaxing ti lubricating epo ati awọn ẹrọ miiran lati sakoso tabi dojuti nyoju.Used ninu textile ile ise fun defoaming ni dyeing, refining, titobi ati awọn ilana miiran; Ni ile-iṣẹ kemikali fun resini sintetiki, latex, kikun, inki ati awọn miiran defoaming; Ni ile-iṣẹ onjẹ fun orisirisi awọn ifọkansi, bakteria, ilana distillation ti defoaming.O yatọ si awọn aaye elo, silikoni emulsion defoaming oluranlowo tabi idojukọ. lori defoaming tabi idojukọ lori foam bomole tabi idojukọ lori compatibility.Non-silicon defoaming òjíṣẹ wa ni o kun kq ọra amides, irin soaps, ọra alcohols, ọra acid esters ati awọn miiran Organic agbo, eyi ti o ni awọn anfani ti o tobi tan kaakiri olùsọdipúpọ ati ki o lagbara agbara lati fọ nyoju, ṣugbọn awọn alailanfani ni o wa ko dara agbara lati dojuti nyoju.Fun awọn lilo ti silikoni defoaming oluranlowo jẹ seese lati le ipolowo si awọn aaye silikoni, idinku, ipa lori didara ọja ti ile-iṣẹ naa yoo lo igbagbogbo ti kii-silicon defoaming. , Emulsification ti ara ẹni ti o dara, iṣeduro kemikali ti o ga ati imuduro igbona giga, eyiti o jẹ itọnisọna idagbasoke ti oluranlowo defoaming.Ni gbogbogbo, ni apakan polyether pq apa, ilosoke ti polyoxyethylene pq apa yoo mu awọn hydrophobicity ti awọn copolymer, nigba ti ilosoke ti polyoxyethylene. pq apa yoo mu awọn oniwe-omi solubility.Ti o ba ti awọn ipin ti polysiloxane pq apa ati polyether pq apa ti wa ni ti o wa titi, ati awọn ti o yẹ ti polyoxy propylene ni polyether pq ti wa ni pọ, awọn solubility ti awọn copolymer ninu omi yoo dinku, awọn aaye turbidity yoo jẹ. dinku, ati iṣẹ-ṣiṣe defoaming yoo ni ilọsiwaju.Polyether títúnṣe polysiloxane oluranlowo defoaming ti wa ni lilo pupọ ni polyester fabric ti o ga ilana kikun dyeing ati ilana bakteria defoaming, ni afikun, o tun le ṣee lo ni diethanolamine desulfurization eto defoaming ati awọn orisirisi epo òjíṣẹ, gige ito, ti kii-didi omi, omi-orisun inki eto defoaming ati titẹ sita ile ise photosensitive resini awo lẹhin fifọ awọn defoaming ti uncured resin.At bayi, nibẹ ni o wa diẹ iru ti yi ni irú ti defoaming oluranlowo ti , eyi ti o jẹ si tun ni awọn iwadi ati idagbasoke ipele, ati awọn gbóògì iye owo jẹ jo ga.

 

 

 


Akoko ifiweranṣẹ: Oṣu kejila-17-2019