31results about How to "Small bubble diameter" patented technology

The invention discloses foam concrete and a preparation method thereof. The foam concrete comprises a gelling material, light aggregate, water, admixture and foaming agent. The preparation method comprises the following steps: (1) pre-treating raw materials to prevent hard lumps and hard grains in the raw materials from depositing in foam slurry; (2) weighing each component according to a proportion; (3) preparing and adding foaming solution; (4) loading and stirring, namely, adding water into a stirrer, starting the stirrer, and adding cement, coal ash, perlite, waterproof agent, anti-freezing agent, water reducing agent and fiber into the stirrer in turn; (5) foaming, namely, foaming at the same time of stirring the slurry, sealing a valve firstly and then pressurizing the valve by an air compressor; (6) adding foam, namely, after the gelling slurry is well prepared, adding the foam into the gelling slurry under the state of stirring without stopping the stirrer; and (7) casting and molding, namely, when the slurry surface has no floating foam, finishing the preparation of the foam slurry. The foam concrete has the functions of light weight, water proofing, fire resistance, heat insulation, freezing resistance, cracking resistance, shock resistance and the like, and is particularly suitable for engineering insulating layers in cold areas and water-blocking and shock-resistant layers of underground engineering.

The tooth edge float valve includes tabulated valve cover, liquid facing valve leg on one end of the valve cover and in the upstream position, liquid backing valve leg on the other end of the valve cover and in the downstream position, and valve feed fixed separately to the lower ends of the liquid facing valve leg and the liquid backing valve leg. The valve cover has downward bending toothed structures in the sides and the downward bending toothed structures can reduce the bubble diameter, raise the stability of the foam layer and avoid the direct spray of gas and liquid. In addition, the valve cover is provided with wedged slot to avoid the formation of gas flow eddy below the float valve, decrease liquid back mixing and lower the gas resistance of the float valve; and the liquid backing valve leg is provided with liquid guide hole for gas to drive liquid towards the outlet dam so as to reduce the liquid surface fall and decrease liquid back mixing.

The invention provides a circulating method for a cold regenerated catalyst and a catalytic cracking reaction regenerating system. The catalytic cracking reaction regenerating system comprises a hoisting pipe reactor, a pre-hoisting section, a regenerator, a heater and a gas-solid annular flow mixing stripper, wherein the gas-solid annular flow mixing stripper is used for mixing a first solid grain and a second solid grain at different temperatures during a regenerating form fluid catalytic cracking process and stripping the smoke and air taken by the solid grains after being mixed; the first solid grain is a low-temperature catalyst or low-temperature to-be-generated agent; and the second solid grain is a high-temperature catalyst. The circulating method for the cold regenerated catalyst comprises the following steps of: mixing and exchanging heat of the first solid grain from the heater and the second solid grain from the regenerator in the gas-solid annular flow mixing stripper, and meanwhile, stripping the taken smoke and air, forming the mixed catalyst and then entering into the pre-hoisting section.

The invention provides a gas/solid circulation mixing steam stripper and a mixing and steam stripping method of solid particles. The gas/solid circulation mixing steam stripper comprises a cylinder body (7) with an inner cavity, a flow guide cylinder (6), a ring-gap gas distributor (3), a gas distributor (11) of the flow guide cylinder, a gas outlet extending into the inside of the cylinder body (7), a cone (2) connected with the lower end of the cylinder body (7), a mixed solid particle outlet (1) arranged below the cone (2), a loose steam ring (12) which is positioned at the bottom of the cone (2) and is also positioned above the mixed solid particle outlet (1), a first solid particle inlet passage and a second solid particle inlet passage, wherein the first solid particle inlet passage and the second solid particle inlet passage are respectively connected to the inside of the cylinder body. The gas/solid circulation mixing steam stripper is adopted by the mixing and steam stripping method of the solid particles.

The invention provides a compound type concrete foaming agent, a preparation method and an application thereof. The compound type concrete foaming agent is prepared by compounding a component A and acomponent B, wherein the component A comprises 10-20 parts of polyvinyl alcohol, 15-25 parts of colophony, 1.5-2.5 parts of anhydrous sodium carbonate, 3.5-4.5 parts of industrial sodium hydroxide, 3-5 parts of triethanolamine, 0.2-0.5 parts of industrial grade hydrochloric acid and 53.5-55.8 parts of water; and the component B comprises 0.2-0.5 parts of triethanolamine, 8-10 parts of sodium sulfate, 12-15 parts of sodium nitrite, 10-25 parts of calcium chloride and 54.7-64.5 parts of water. The compound type concrete foaming agent not only can increase the doped quantity of the foaming agentbut also can compensate the concrete strength and the solidification time; the compound type concrete foaming agent can be used for manufacturing foam concrete with super-low capacity, also utilize alarge amount of waste residues, such as industrial and architectural rubbish and the like, to produce light foamed concrete.

The invention relates to an external-circulation airlift type reactor adopting membrane tube aeration. The external-circulation airlift type reactor comprises an external-circulation airlift type reactor body, wherein a gas distributor is arranged on the bottom of the external-circulation airlift type reactor body; and a membrane tube with a nanoscale pore diameter is connected on the gas distributor. According to the external-circulation airlift type reactor adopting the membrane tube aeration, the membrane tube is applied to the external-circulation airlift type reactor, and the nanoscale pore diameter of the membrane tube is adopted, so air bubbles escaping from the membrane tube are small in diameter and large in quantity, and therefore, the problem that the air bubbles of a spray nozzle type distributor and a plate pore type distributor are larger is overcome; moreover, the mass transfer performance is greatly improved for facilitating the control of dissolved oxygen in fermentation liquor.

The invention relates to a low-density and aerated foaming gypsum block. The low-density aerated foaming gypsum block mainly comprises gypsum powder, coal ash, cement, limestone, gas forming agent, calcium carbide, retarders and the like. The low-density aerated foaming gypsum block has the characteristics of low volume density, high strength, light weight, good anti-seismic property, thermal insulation, damp proofing and sound insulation, good workability, fire proofing and flame retardance and the like.

The invention relates to a device (100) for nebulizing a liquid, comprising: a vessel (110) that is open at the top portion thereof and configured so as to contain the liquid to be nebulized; at least two ultrasonic-wave generators (120, 130) for emitting at least two ultrasonic-wave fronts (122, 132) into the liquid; and at least two means (134, 124) for focusing the ultrasonic waves, each of which engages with one of said generators (120, 130) in order to concentrate ultrasonic waves at a single point P less than ten millimetres from the free surface of the liquid, wherein the vibration frequencies of the two wave fronts (122, 132) are different.

The invention discloses light weight foam concrete capable of adsorbing mass decoration pollutants. The light weight foam concrete is prepared from a polyhydroxy compound, Portland cement, gypsum powder, aramid hollow staple fibers, a cement foaming agent, a peroxide product with a protective film and water. The light weight foam concrete is prepared in the following steps: firstly, adding the polyhydroxy compound into the water for dissolving; secondly, adding the Portland cement, the gypsum powder and the aramid hollow staple fibers into a solution and continuously stirring until gel is formed; preparing the cement foaming agent into foam, adding the peroxide product with the protective film into the foam for uniformly stirring; adding a foam material into the gel for uniformly mixing, pouring a mixture into a die, molding and curing for 15 to 25 days to obtain a finished product of the light weight foam concrete. The light weight foam concrete prepared by the invention greatly improves the absorption and decomposition capabilities of the decoration pollutants such as formaldehyde and harmful organic matters and is more suitable for serving as a geotechnical building material.

The invention discloses a method for preparing a novel composite concrete air entraining agent. The novel composite concrete air entraining agent is prepared from 5%-15% of dodecyl dimethylamine, 5%-15% of sodium ethoxylated alkyl sulfate, 5%-10% of sodium abietate, 5%-15% of coconut oil diethanolamide and the balance water. According to the method, the materials with different components for airentraining, bubble stabilizing, plastification and the like are compounded to be used for perfecting the application performance of concrete, the novel composite concrete air entraining agent is liquid, can be dissolved in water, and can be diluted into the liquid with the concentration of 1.5%-2.0% in a stirring station to be automatically metered and added. The novel composite concrete air entraining agent can be used when a finished additive is compounded, the compounding performance of the product and other concrete additives is good, the amount of admixture is small, the compounding effect is superior to that of a deltonin air entraining agent, the surface tension of a solution can be effectively reduced, and sealed and independent bubbles are generated. The advantages of being high in foaming rate, small in bubble diameter and bubble stabilizing time are achieved, and the work performance of the concrete and the concrete flowing slump loss resistant performance can be obviously improved.

The invention relates to a silica sand grain graduation non-alkali glass batch which comprises the following ingredients in percentage by mass: 59% of SiO2, 17% of Al2O3, 0.2% of ZrO2, 5% of CaO, 7% of B2O2, 3% of MgO, 6.55% of SrO, 1.8% of P2O5, 0.15% of SnO, 0.15% of MoO3 and 0.15% of WO3. The batch is characterized in that silica sand grains in grain sizes of greater than 0.15 mm, 0.075-0.15 mm, 0.045-0.75 mm and less than 0.045 mm account for 1.0%, 80.0%, 14.0% and 5.0% of the weight of total silica sand respectively. The batch has the benefits that high quality non-alkali glass with a small residual bubble quantity, small bubble diameter and good homogeneity is obtained through silica sand grain graduation and an optimized proportion of the silica sand grain sizes; the cost is effectively reduced through the silica sand grain graduation; a technology is simple.

The invention relates to a power unit of an aeration device. The unit provides power for a vapor-liquid equilibrium chamber. The unit is characterized in comprising a motor 14, a transmission gear set 15, and a change gear set 16. Power is transmitted to a transmission shaft 2 through the change gear set. And an equilibrium plate 24 operates under the driving of the transmission shaft 2.

The invention provides foam concrete. The foam concrete is prepared by the following method: (1) uniformly mixing cement, a water reducing agent, a waterproof agent and part of water to obtain cementpaste, (2) foaming a composite foaming agent and the balance of water in a foaming machine, adding the cement paste in the step (1), uniformly mixing to obtain foamed cement paste, adding ceramsite and a coagulant, and uniformly mixing to obtain the foam concrete paste, and (3) pouring the foam concrete slurry into a mold, molding, and carrying out steam curing to a specified age, wherein the cement is composed of Portland cement and aluminate cement according to a mass ratio of (5-10): 1, and the composite foaming agent is composed of fatty alcohol-polyoxyethylene ether, sodium dodecyl benzene sulfonate and cassava starch according to a mass ratio of (1-2): (0.5-2). The foam concrete disclosed by the invention has the characteristics of good waterproof and anti-seepage performance, high strength and difficulty in cracking, and can be widely applied to building materials.