Lightweight Nja Additives | Awọn aṣoju Fọmu Iṣe-giga fun Nja Cellular
What is foam generator?
Foaming machine, also known as foam generator, is a kind of foam equipment that makes foaming agent reach a certain concentration of aqueous solution. The foaming agent itself cannot automatically become a foam, it must pass the mechanical action of the foaming machine to become foam.
What is the principle of the foam generator?
Laiwo ti foomu monomono, Ilana ipilẹ ti foomu ni lati ṣafihan afẹfẹ sinu ojutu oluranlowo foomu. Awọn oriṣiriṣi awọn iyipada yatọ si ni ọna ti n ṣafihan gaasi, nitorina ipa tun yatọ.
Awọn ifosiwewe pataki meji wa fun dida foomu, one is foaming agent solution, ati awọn miiran jẹ afẹfẹ, both of which are indispensable. Laisi ojutu oluranlowo fifun, fiimu olomi ti o yika gaasi naa ko ni dagba ati pe kii yoo jẹ awọn nyoju. Ati laisi gaasi, Ojutu aṣoju foaming nikan ko le ṣe awọn nyoju.
Ni awọn ti nkuta Ibiyi eto, ojutu oluranlowo fifun ni alabọde pipinka, gaasi ni awọn tuka alakoso, ati gaasi ti wa ni tuka sinu omi lati dagba awọn nyoju, ati lẹhinna ọpọlọpọ awọn nyoju dagba foomu. Ni afikun si pataki ifosiwewe ti fifun iṣẹ oluranlowo, ifihan gaasi sinu ojutu oluranlowo fifun jẹ ifosiwewe pataki miiran. Ilana ti monomono foomu ni lati ṣafihan gaasi sinu omi bibajẹ, iyẹn ni, monomono foomu nlo ọna kan lati ṣafihan gaasi sinu omi. Awọn ẹrọ ifomu oriṣiriṣi ni awọn ọna oriṣiriṣi ti iṣafihan gaasi. Ni Gbogbogbo, awọn ọna pupọ lo wa lati ṣafihan gaasi sinu ẹrọ foomu:
(1) Laiyara yiyi abe agbekale gaasi
Eyi jẹ ọna lati ṣafihan gaasi taara sinu amọ-lile (tabi nja slurry) adalu pẹlu simenti foomu oluranlowo. Nigbati awọn aladapo abẹfẹlẹ Titari awọn slurry, afẹfẹ ti nwọ inu slurry pẹlu awọn aladapọ abe. Ni afikun, ti o tobi iye ti air ti wa ni ti a we sinu slurry nigbati awọn slurry ti wa ni titan, ati apakan ti afẹfẹ ti wa ni mu sinu slurry nipasẹ simenti ati apapọ. Apapọ ti awọn mẹta ni lapapọ iye ti air titẹ awọn slurry. Lára wọn, Atẹgun ti a mu wa sinu slurry nipasẹ abẹfẹlẹ ti nru ati afẹfẹ ti a we nipasẹ abẹfẹlẹ titan slurry gba ara akọkọ.
Lẹhin ti afẹfẹ wọ inu slurry, omi ti o ni oluranlowo ifofo surfactant yika afẹfẹ, lara fiimu olomi Layer meji-itanna ni wiwo laarin afẹfẹ ati omi, ati nipari awọn fọọmu awọn nyoju ni slurry ni irisi air-ni-omi.
Nitori iyara yiyi lọra ti awọn abẹfẹlẹ ati gaasi ti o kere si ti a ṣafihan ni ọna yii, iye awọn nyoju ti ipilẹṣẹ jẹ kekere, ipa ifofo ko dara, ati ṣiṣe jẹ kekere.
(2) Awọn abẹfẹ yiyi-giga n ṣafihan gaasi
Eyi jẹ ọna ti iṣafihan gaasi sinu ojutu oluranlowo fifun nipa gbigbekele awọn abẹfẹ yiyi-giga. Awọn ifihan ti gaasi o kun da lori agbara ti yiyi abe. Awọn abẹfẹlẹ ti iru yii ni gbogbogbo nilo yiyi-giga, the speed should be> 700 rpm, gbogbo laarin 700 ati 1400 rpm, and the peripheral speed of the impeller end should be> 20 m/s ni ibere lati gba itelorun esi. Iyara giga kan le fi impeller han si omi bibajẹ, olubasọrọ pẹlu air, ati ṣafihan afẹfẹ. Ti iyara ba kere ju, impeller yoo wa ko le fara si awọn olomi, ati iye afẹfẹ ẹjẹ yoo jẹ kekere pupọ. Awọn to dara iyara yẹ ki o wa kekere ju awọn impeller ti wa ni fara nigbati awọn omi ti wa ni yiyi.
The basic principle of impeller bleed air is as follows:
When the impeller rotates at a high speed, it drives the cement foaming agent solution in the foaming cylinder to rotate, forming a rolling circulation and generating a large vortex. At this time, the gas-liquid two-phase particles located at the gas-liquid interface at the top of the blowing agent solution will accompany them down and descend to the bottom of the vortex in a rapid spiral shape, forming a turbulent flow zone at 2.5-5 cm of the impeller edge. In this area, the gas-liquid two-phase particles are subjected to the strong shear and impact of the impeller, and are dispersed into fine dispersions, which quickly realizes the gas-liquid mixing, makes the gas uniformly dispersed in the liquid, and realizes the gas Introduce. Its introduction efficiency is related to various technical factors such as the speed, the diameter of the impeller, the distance between the impeller and the foaming tube, and the shape of the impeller blades. It is not determined by a single speed. High-speed impellers have air-entraining effects, but the efficiency, ipa, and energy consumption are different.
(3) Use of pressure to introduce gas.
This is currently the most commonly used advanced air-entrained foaming method at home and abroad. O tun jẹ ọna ti o ni imọ-jinlẹ ti afẹfẹ diẹ sii. It is the core of foam concrete high-pressure and medium-pressure foam generator technology.
Awọn ọna meji ti a mẹnuba loke jẹ o lọra ati aiṣedeede, ati iwọn ila opin ti nkuta jẹ nla, paapaa iwọn ila opin ti nkuta ko le ṣakoso. O ti wa ni patapata ti o gbẹkẹle lori awọn ID ti awọn foomu ẹrọ, ati pe ko le ṣe iṣeduro iwọn ila opin ti nkuta kekere ati foomu aṣọ. Awọn itọkasi imọ-ẹrọ to ṣe pataki julọ. Ni akoko kan naa, iye ti foomu jẹ soro lati sakoso.
Lati le yanju awọn iṣoro ti o wa loke daradara, ọna foaming titẹ-entrained wa sinu jije. Regardless of foaming volume, iyara foomu, or foam diameter and foam uniformity, ati be be lo., wọn ti tẹ ipele tuntun kan ati pe wọn ti ni ilọsiwaju nla ti imọ-ẹrọ. Ilana akọkọ rẹ ni lati lo ọpọlọpọ awọn ohun elo ti o le ṣe ina titẹ afẹfẹ lati tẹ afẹfẹ sinu ipele omi lati ṣaṣeyọri idapọ aṣọ ti awọn ipele meji.. Labẹ titẹ deede, o ṣoro fun afẹfẹ lati wọ inu omi, ṣugbọn labẹ awọn titẹ, o di rọrun. Iwọn afẹfẹ yii kii ṣe titẹ gaasi nikan sinu omi, ṣugbọn tun tẹ omi naa sinu gaasi naa. Ni pato, o nigbakanna kan titẹ. Ni ọna yi, dapọ ti awọn ipele meji yoo yara, daradara, aṣọ ile, ati ki o ni itanran nyoju, eyi ti o pàdé awọn bojumu imọ awọn ibeere fun foomu.
There are two main types of pressure equipment used in our country, one is an air compressor and the other is a blower. The air compressor produces high pressure, and the blower produces medium low pressure. Nitorina, the foaming effect of the air compressor is better, and the foaming effect of the blower is slightly worse. Foaming with an air compressor is called a high-pressure foaming machine, and foaming with a blower is called a medium and low pressure foam generator. The foaming quality of the air compressor mainly controls its pressure and displacement, while the foaming of the blower mainly controls its wind pressure and air volume.
Due to the good foaming effect of air compression mechanism, most foaming machines in our country use air compressors. Blower foaming also has many applications in my country, but compared to high-pressure foaming, this foaming method is still rare. The foam produced by high-pressure air foaming has a low water-sucking rate, the bubble diameter is small, dense and uniform, and the quality is high. The foam produced by blast foaming has a slightly larger diameter, and the overall quality is not as good as high-pressure foaming.
(4) High pressure jet introduces gas
This is a foaming method that has been tried in recent years but has not been widely used. The basic principle is to use the strong dispersion force generated by the jet to achieve instantaneous large surface contact between the gas phase and the liquid phase, so that the two are uniformly mixed, and the liquid is entrapped to form a foam. This method does not show any more advantages than high-pressure air foaming, and it needs further exploration and improvement.
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