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68results about How to "Stable atomization" patented technology

Control unit and control method for reductant supply device

There are provided a reductant supply device and a control method for the reductant supply device, which can prevent heat damage of a reductant injection valve, and also prevent crystallization of urea solution due to excessive cooling of the solution reductant.The reductant supply device which is used in an exhaust gas purification device that injects and supplies, as a reductant, a urea solution to an exhaust gas upstream side of a reduction catalyst disposed in an exhaust gas passage of an internal combustion engine, and that reduces and purifies nitrogen oxides contained in exhaust gas using the reduction catalyst, the reductant supply device having a reductant injection valve that is fixed to an exhaust pipe on the exhaust gas upstream side of the reduction catalyst, includes: a cooling water circulation passage that circulates at least part of cooling water of the internal combustion engine to cool the reductant injection valve; flow rate control means for adjusting a flow rate of cooling water flowing through the cooling water circulation passage; temperature detection means for detecting a temperature of the reductant injection valve; and control means for controlling the flow rate control means based on the temperature of the reductant injection valve.
Owner:BOSCH CORP

Adjustable ultra-fine atomizing nozzle for titanium and titanium alloy melt

The invention discloses an adjustable ultra-fine atomizing nozzle for titanium and titanium alloy melt. A titanium melt passage penetrates a titanium melt flow guide pipe along the axis, a nozzle sleeve is fixed at one end of the titanium melt flow guide pipe through positioning bolts, high-pressure gas source chambers provided with high-pressure gas source inlets are formed among the outer wall of the titanium melt flow guide pipe and the inner walls of the nozzle sleeve which are partitioned by the positioning bolts, the other end of the titanium melt flow guide pipe is contracted gradually, the inner walls of the nozzle sleeve, opposite to corresponding gradually contracted surfaces, respectively comprise two slope surfaces so that a Laval nozzle is formed among the slope surfaces and the gradually contracted outer wall of the titanium melt flow guide pipe, and the positioning bolts adjust the section size of the Laval nozzle. The size of a throat of the Laval nozzle can be adjusted by the nozzle sleeve, Mach number sprayed by high-pressure gas flow is determined by the throat size, and accordingly, the size of round powder particles formed after atomization of titanium and titanium alloy is determined. By the aid of the adjustable ultra-fine atomizing nozzle for the titanium and titanium alloy melt, powder in different particle sizes can be obtained according to needs, so that equipment flexibility is improved, and an atomizing process is stable and easy to control.
Owner:NANJING LEIRUI NEW MATERIAL SCI & TECH

Bubble breaking and target type impact combined reinforced throat pipe type nozzle

ActiveCN112452577AExit speed adjustableImproved nebulizationCatalytic crackingLiquid spraying apparatusParticle flowPtru catalyst
The invention relates to the field of catalytic cracking productive chemicals, in particular to an efficient atomizing nozzle technology for crude oil. Provided is a bubble breaking and target type impact combined reinforced throat pipe type nozzle. According to the nozzle, first-stage bubble breaking, second-stage impact breaking, third-stage throat pipe type breaking and fourth-stage throat pipetype re-breaking are included. Finally, crude oil enters a spray head (24) through an expansion buffer chamber (18) and is sprayed out from a nozzle spout (19). Due to the fact that the nozzle spoutis inclined, thin fan-shaped spraying mist flow is finally formed, and the mist flow can be fully mixed with catalyst particle flow from the pre-lifting section. According to the novel nozzle, the principle of instant bubble blasting is fully utilized, the advantages and characteristics of a target type nozzle and a throat pipe type nozzle are integrated, the atomization performance of high-viscosity crude oil is greatly improved, fog drops with small particle sizes and narrow particle size distribution are effectively generated, and the nozzle has the characteristics of adjustable droplet ejection speed, low gas-liquid ratio, stable atomization process, high operation elasticity, simple structure, impact wear resistance, reduction of coking in the cracking process and the like.
Owner:INST OF PROCESS ENG CHINESE ACAD OF SCI

Silicon-titanium alloy film coat of air preheater tube and electrostatic spraying process thereof

The invention relates to a silicon-titanium alloy film coat of an air preheater tube and an electrostatic spraying process thereof, and belongs to the electrostatic spraying technology of an environment-friendly, energy-saving and efficient silicon-titanium alloy film air preheater tube. Main components of the coat comprise SiO2, NiO, B2O3, TiO2, Pb2O3, NaO2 and K2O. A preparation method for the coat comprises the following steps: mixing and crushing common silicon-titanium alloy power and K2O to charge the powder, spraying the mixture to an air preheater steel tube under the high pressure of 30 to 120KV by using a positioning gun, heating and cooling the steel tube, and cushioning a high-temperature pad to obtain the coat. The process can realize automatic powder spraying, does not need manpower, obtains workpieces with unlimited lengths, and has the characteristics of environmental protection, energy conservation and high efficiency; due to the addition of K2O, the atomization is stable, the film is coated uniformly, the mass density is high and the thickness is controllable; the manpower and spraying cost are saved, and the service life is prolonged; and the prepared coat is superior to that in a common enamel process and a plastic powder electrostatic spraying process on the aspects of mechanical strength, adhesive force, high temperature resistance, abrasion resistance, acid and alkali corrosion resistance, ageing resistance and the like.
Owner:济南屹林科技有限公司

Atomized acid shaft flow simulation platform for gas injection development of fracture-cavity type oil reservoir and working method thereof

The invention discloses an atomized acid shaft flow simulation platform for gas injection development of a fracture-cavity type oil reservoir. The atomized acid shaft flow simulation platform mainly comprises a double-flow venturi atomization generation device, a shaft flow simulation device and an atomization evaluation device. The atomization generation device comprises an air path system, a liquid path system and an atomization generator; the airpath system comprises an air compressor, an air throttle valve and an air pressure gauge; the liquid path system comprises a high-pressure acid-proof pump, a liquid throttle valve and a liquid pressure gauge; the simulation wellbore is used for being connected with the double-flow venturi atomization generation device and comprises a vertical wellbore, a horizontal simulation stratum and an effusion collecting device. The observation system comprises a nano laser particle size analyzer. The invention also discloses a working method of the atomized acid shaft flow simulation platform for gas injection development of the fracture-cavity type oil reservoir. The simulation platform can be applied to an oil field site, the injection displacement is controlled through the air path system and the liquid path system, the high acid liquor atomization rate is kept according to site construction requirements, the acidification effect of the fracture-cavity type oil reservoir is improved and effective communication of the fracture-cavity type storage and collection unit bodies can be realized.
Owner:CHINA UNIV OF PETROLEUM (EAST CHINA)

Acid liquid atomization device for deep acidification of fractured-vuggy reservoir and atomization method thereof

The invention discloses an acid liquid atomization device for deep acidification of a fractured-vuggy reservoir. The acid liquid atomization device for deep acidification of the fractured-vuggy reservoir comprises a gas path system, a liquid path system and an atomization nozzle; the gas path system comprises a gas inlet and an air compressor; the liquid path system comprises acid liquid inlets, ahigh-pressure acid-proof pump and a double-flow type Venturi tube; air is pressurized by the air compressor and then enters the gas inlet; and acid liquid is pressurized by the high-pressure acid-proof pump and then enters an annular cavity, the annular cavity is used for accumulating the acid liquid, the acid liquid in the annular cavity enters a cylindrical cavity through the acid liquid inletsformed in the wall, acid mist is formed in the cylindrical cavity as the hydrodynamic cavitation effect, the acid mist is constrained by the cylindrical cavity to form acid mist columnar fluid, the acid mist columnar fluid moves at high speed in an atomization generator and is finally sprayed out from the atomization nozzle of the atomization generator, and the atomization nozzle is directly connected with a shaft. The acid liquid atomization device for deep acidification of the fractured-vuggy reservoir has the good high temperature resistance, high pressure resistance and acid resistance, the injection displacement can be controlled through the gas path system and the liquid path system, the high acid liquid atomization rate is kept, and the acidification effect of the fractured-vuggy reservoir is improved.
Owner:CHINA UNIV OF PETROLEUM (EAST CHINA)

Flame stabilizing device for TBCC subsonic combustion ramjet engine combustion chamber

The invention provides a flame stabilizing device for a TBCC subsonic combustion ramjet engine combustion chamber. The flame stabilizing device for the TBCC subsonic combustion ramjet engine combustion chamber comprises a supporting plate, a cover hood and an on-duty fuel injector bar. The supporting plate and the cover hood are connected together to form a cavity, the on-duty fuel injector bar is arranged in the cavity, the supporting plate has an upper surface and a lower surface, the lower surface has a concave cavity while the upper surface has a convex cavity, the supporting plate has a front cavity and a back cavity, the front cavity is located between the cavity and the back cavity, the front cavity is used for introducing cooling gas, a primary oil way fuel injector bar is arranged in the back cavity, a cooling gas round channel communicating the front cavity with the back cavity is formed between the front cavity and the back cavity, and a cooling gas round channel communicating the front cavity with the cavity is formed between the front cavity and the cavity. By reasonably arranging the fuel supply positions of the on-duty fuel injector bar and the primary oil way and improving the atomizing effect by way of various modes such as pressure atomization, pneumatic atomization and colliding atomization, the ignition property of the TBCC subsonic combustion ramjet engine combustion chamber is improved, the combustion property in a wide range is considered, and the integral property of the TBCC subsonic combustion ramjet engine combustion chamber is improved.
Owner:中航空天发动机研究院有限公司

Multi-stage free-style gas atomization spray disc with gas self-circulation function

The invention relates to a multilevel free-type gas atomization spraying tray with the gas self-circulation function. The multilevel free-type gas atomization spraying tray comprises an auxiliary nozzle, a main nozzle and a recycling gas flow guide part. The auxiliary nozzle is connected with the upper end of the recycling gas flow guide part, and the lower end of the recycling gas flow guide partis connected with the main nozzle. A melt channel of the auxiliary nozzle, a melt channel of the recycling gas flow guide part and a melt channel of the main nozzle communicate with one another up and down. A recycling flow guide channel is formed between the recycling gas flow guide part and the main nozzle. The recycling flow guide channel communicates with the melt channel of the main nozzle,and when the main nozzle is installed on a partition plate between a smelting chamber and an atomizing chamber, the recycling flow guide channel can communicate with the atomizing chamber. Compared with the prior art, auxiliary nozzle airflow is used for draining molten steel and further lowering negative pressure of a main nozzle atomization area, main nozzle jacket holes and the recycling gas flow guide part are used for achieving atomizing gas self-circulation, and therefore gas balancing of the main nozzle atomization area is realized, and stable and smooth execution of the atomizing process is guaranteed.
Owner:SHANGHAI RES INST OF MATERIALS CO LTD

Ultrasonic atomization device

InactiveCN103223391AExtended service lifeInternal and external pressure regulationLiquid spraying apparatusUltrasonic atomizationMaterials science
The invention discloses an ultrasonic atomization device which comprises an atomized liquid storage chamber for storing atomized liquid, and an atomization chamber communicated with the atomized liquid storage chamber by a first through hole (54), wherein a piezoelectric ceramic atomization sheet (4) is arranged on an external wall of the atomization chamber; a power supply device (518) supplies power to the piezoelectric ceramic atomization sheet (4); the ultrasonic atomization device further comprises a pressure regulation chamber; and a pressure regulation component (5) is arranged between the pressure regulation chamber and the atomized liquid storage chamber. The ultrasonic atomization device adopting a special structure decreases ionic compounds physically deposited in atomization micropores in the liquid, prevents an atomization element from long-term contact with the liquid, and prevents salt plasma compounds from being naturally deposited in the atomization micropores, the service life of the atomization device is prolonged, and the leakage of the atomized liquid is avoided. The atomization device integrates atomization, humidification and external charging, and is convenient and simple, and convenient to carry, and the practical value of the atomization device is improved.
Owner:张建辉

Multilevel free-type gas atomization spraying tray with gas self-circulation function

The invention relates to a multilevel free-type gas atomization spraying tray with the gas self-circulation function. The multilevel free-type gas atomization spraying tray comprises an auxiliary nozzle, a main nozzle and a recycling gas flow guide part. The auxiliary nozzle is connected with the upper end of the recycling gas flow guide part, and the lower end of the recycling gas flow guide partis connected with the main nozzle. A melt channel of the auxiliary nozzle, a melt channel of the recycling gas flow guide part and a melt channel of the main nozzle communicate with one another up and down. A recycling flow guide channel is formed between the recycling gas flow guide part and the main nozzle. The recycling flow guide channel communicates with the melt channel of the main nozzle,and when the main nozzle is installed on a partition plate between a smelting chamber and an atomizing chamber, the recycling flow guide channel can communicate with the atomizing chamber. Compared with the prior art, auxiliary nozzle airflow is used for draining molten steel and further lowering negative pressure of a main nozzle atomization area, main nozzle jacket holes and the recycling gas flow guide part are used for achieving atomizing gas self-circulation, and therefore gas balancing of the main nozzle atomization area is realized, and stable and smooth execution of the atomizing process is guaranteed.
Owner:SHANGHAI RES INST OF MATERIALS CO LTD
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