Nā Pākuʻi Paʻa Māmā | Nā ʻĀpana Hoʻohuʻi Kiʻekiʻe no ka Kelepona Kelepona
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?
Me ka nānā ʻole i ka mea hoʻoheheʻe pahu, ʻO ke kumu kumu o ka huʻa ʻana, ʻo ia ka hoʻokomo ʻana i ka ea i loko o ka solution agent foaming. ʻOkoʻa nā ʻano hoʻololi like ʻole i ke ʻano o ka hoʻokomo ʻana i ke kinoea, no laila ʻokoʻa ka hopena.
ʻElua mau kumu e pono ai no ka hoʻokumu ʻana i ka pua, one is foaming agent solution, a o ka ea kekahi, both of which are indispensable. Me ka ʻole o ka hoʻonā ʻana i ka mea puhi, ʻaʻole e hana ʻia ka kiʻiʻoniʻoni wai e hoʻopuni ana i ke kinoea a ʻaʻohe ʻōhū. A me ke kinoea ʻole, ʻAʻole hiki i ka mea hoʻohāhā wale nō ke hana i nā ʻōhū.
I ka ʻōnaehana hoʻoheheʻe ʻia, ʻO ka hoʻoheheʻe ʻana i ka mea puhi ʻo ia ka mea hoʻopuehu, ʻo ke kinoea ka māhele hoʻopuehu, a hoʻopuehu ʻia ke kinoea i loko o ka wai e lilo i ʻōhū, a laila nui nā ʻōhū i hana ʻia i ka huʻa. Ma waho aʻe o ka mea koʻikoʻi o ka hoʻokō ʻana i ka mea hana, ʻo ka hoʻokomo ʻana o ke kinoea i loko o ka ʻenehana puhi ʻana he mea nui ʻē aʻe. ʻO ke kumumanaʻo o ka mea hoʻoheheʻe pahu e hoʻokomo i ke kinoea i loko o ka wai, ʻo ia, hoʻohana ka mea hoʻoheheʻe pahu i kekahi ala e hoʻokomo i ke kinoea i loko o ka wai. Loaʻa nā ʻano hana like ʻole o ka hoʻokomo ʻana i ke kinoea i nā mīkini huʻa. Laulaha, nui nā ala e hoʻokomo ai i ke kinoea i loko o ka mīkini huʻa:
(1) Hoʻokomo ʻia nā lau e hoʻololi mālie i ke kinoea
He ala kēia e hoʻokomo pono ai i ke kinoea i loko o ka pahū (a i ʻole ka slurry koneki) hui pū ʻia me ka mea hoʻohāhā sima. I ka wā e hoʻokuʻu ai ka mea huila i ka slurry, komo ka ea i loko o ka slurry me nā lau hui. Kahi mea hou aʻe, wahī ʻia ka nui o ka ea i loko o ka slurry ke hoʻohuli ʻia ka slurry, a lawe ʻia kekahi hapa o ka ea i loko o ka slurry e ka sima a me ka hui. ʻO ka huina o nā ʻekolu, ʻo ia ka nui o ka ea e komo ana i loko o ka slurry. Iwaena o lakou, ka ea i lawe ʻia i loko o ka slurry e ka ʻili hoʻoulu a me ka ea i ʻōwili ʻia e ka ʻili e hoʻohuli ana i ka slurry e noho i ke kino nui..
Ma hope o ke komo ʻana o ka ea i ka slurry, ʻo ka wai i loaʻa i ka mea hoʻohāhā e hoʻopuni ana i ka ea, ka hana ʻana i kahi kiʻi ʻoniʻoni wai papalua-electron ma ke kikowaena ma waena o ka ea a me ka wai, a hoʻokumu i nā ʻōhū i loko o ka slurry ma ke ʻano o ka ea-in-wai.
Ma muli o ka wikiwiki o ka hoʻololi ʻana o nā lau a me ka liʻiliʻi o ke kinoea i hoʻokomo ʻia ma kēia ʻano, liʻiliʻi ka nui o nā ʻōhū i hana ʻia, ʻaʻole maikaʻi ka hopena huʻa, a ua emi ka pono.
(2) Hoʻokomo ʻia nā lāʻau hoʻololi kiʻekiʻe i ke kinoea
He ala kēia o ka hoʻokomo ʻana i ke kinoea i loko o ka solution agent blowing ma o ka hilinaʻi ʻana i nā ʻāpana kiʻekiʻe.. ʻO ka hoʻokomo ʻana o ke kinoea e hilinaʻi nui ʻia i ka ikaika o nā lau ʻōwili. Pono nā ʻili o kēia ʻano i ka hoʻololi kiʻekiʻe, the speed should be> 700 rpm, maʻamau ma waena 700 a 1400 rpm, and the peripheral speed of the impeller end should be> 20 m/s no ka loaʻa ʻana o nā hopena ʻoluʻolu. Hiki i kekahi wikiwiki kiʻekiʻe ke hōʻike i ka impeller i ka wai, pili me ka ea, a hookomo i ka ea. Inā haʻahaʻa loa ka māmā holo, ʻaʻole e ʻike ʻia ka impeller i ka wai, a e emi loa ka nui o ke ea koko. Pono e haʻahaʻa ka wikiwiki kūpono ma mua o ka hōʻike ʻana o ka impeller i ka wā e ʻōwili ai ka wai.
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. I keia manawa, 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, hopena, 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. ʻO ia hoʻi kahi ʻano ʻepekema ʻoi aku ka ea. It is the core of foam concrete high-pressure and medium-pressure foam generator technology.
ʻO nā ala ʻelua i ʻōlelo ʻia ma luna nei he lohi a ʻaʻole like, a nui ke anawaena ohu, ʻaʻole hiki ke hoʻomalu ʻia ke anawaena ʻōhū. Pili loa ia i ka randomness o ka mīkini hū, ʻaʻole hiki ke hōʻoiaʻiʻo i ke anawaena o ka huʻihuʻi liʻiliʻi a me ka huʻa like. ʻO nā hōʻailona ʻenehana koʻikoʻi loa. I ka manawa like, paʻakikī ka nui o ka huʻa ʻana.
I mea e hoopau pono ai i na pilikia maluna, ua hoʻokumu ʻia ke ʻano o ka huʻa ʻana i ke kaomi. Regardless of foaming volume, hūa māmā, or foam diameter and foam uniformity, etc., ua pae lākou i kahi pae hou a ua holomua ka ʻenehana nui. ʻO kāna kumu nui ka hoʻohana ʻana i nā mea hana like ʻole e hiki ai ke hoʻoulu i ke ea e kaomi i ka ea i loko o ka pae wai e hoʻokō i ka hui like ʻana o nā ʻāpana ʻelua.. Ma lalo o ke kaomi maʻamau, paʻakikī ke komo ʻana o ka ea i ka wai, aka, malalo o kekahi pilikia, lilo i mea maʻalahi. ʻAʻole kaomi wale kēia ea i ke kinoea i loko o ka wai, akā, kaomi pū i ka wai i loko o ke kinoea. I ka ʻoiaʻiʻo, ia manawa hoʻohana kaomi. Ma keia ano, e wikiwiki ana ka hui ʻana o nā pae ʻelua, pono, ʻaʻahu, a loaʻa nā ʻōhū maikaʻi, i kūpono i nā koi ʻenehana kūpono no ka foam.
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. No laila, 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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