48results about How to "Improve entrainment capacity" patented technology

The invention discloses an ejector device with a movable working nozzle, and belongs to the field of ejectors. The working nozzle is connected with a shrinking pipe of an ejector main body through a connecting piece, so that the working nozzle can move in the central axis direction of the ejector main body. The distance between the exit port of the nozzle and the throat part of the ejector can be changed to reach an optimal value, so that ejection capacity of the ejector for lower pressure gas is improved, the ejection ratio is increased, working performance of the ejector is improved. The ejector device with the movable working nozzle is not affected by kinds of the ejector, the design of the ejector device with the movable working nozzle can be used for all different ejectors, the distance between the exit port of the working nozzle and the throat part of the ejector is adjusted, the ejection ratio is increased, and the ejection performance of the ejector is improved.

The invention relates to a compound jet pump based on the combination of center jet flow and annular jet flow. The compound jet pump comprises a working water pipe, a center nozzle, an annular nozzle,a water suction tube, a suction-in chamber, a throat tube inlet section, a throat tube, a diffusing tube and a water outlet tube. The compound jet pump further comprises a center nozzle control valveand an annular nozzle control valve. The center nozzle is arranged at the center of the annular nozzle. The center jet flow and the annular jet flow are combined. The compound jet pump solves the problems that a single center jet pump or single annular jet pump is low in efficiency, and the properties can be turned to be poor after working condition change. Compared with a traditional center jetpump and annular jet pump which are mostly used at present, the compound jet pump is small in structural change, the required parts are not greatly increased and technological processing can be achieved easily. The working efficiency is high, the problems which cannot be achieved by the traditional single jet pump are solved, and thus the application prospects are broad.

The invention provides a cavity trapped vortex and rectifying support plate combined type integrated afterburner. The ignition stability can be improved effectively, and the swirling intensity of a backflow area and the fuel atomization effect are improved, so that the combustion efficiency and stability are improved. A rectifying support plate flame stabilizer is combined with cavity trapped vortex; on one hand, air flow of inner and outer ducts enters a cavity from different positions, and a trapped vortex area is formed; duty-level flame is generated, so that mixed gas of a main flow area is ignited; on the other hand, a stable main backflow area with a certain gas backflow amount and in an appropriate size is formed downstream; and ignited high-temperature air and air in the outer ductare promoted to mix, and play a role in rectification and stabilization of combustion. The integrated afterburner has the advantages that the structural design of a cavity duty stabilizer is added atthe rear edge of the rectifying support plate flame stabilizer on the original basis of the integrated afterburner, and the ignition ability under the rich oil and high altitude conditions can be improved effectively; and the high combustion stability and efficiency are ensured.

The invention discloses a suction nozzle assembly, and the assembly comprises a suction nozzle body; a shell is arranged on the suction nozzle body, an inclined side wall is arranged on the shell, a dust collection cavity is formed by the suction nozzle body and the shell, an air inlet is formed in the bottom face of the suction nozzle body, and an air outlet is formed in the shell; airflow enters from the air inlet, flows through the dust collection chamber and is discharged from the air outlet, so the airflow flowing through the dust collection chamber is uniformly distributed. The invention further discloses a cleaning robot. The cleaning robot comprises the suction nozzle assembly. According to the suction nozzle assembly, the height from the air outlet to the ground is reduced, the average air speed in the dust collection cavity is increased, vortex airflow can be generated, the entrainment effect is enhanced, and therefore, the suction force to the ground and the negative pressure level are improved, the suction force below the air outlet is enhanced, and the dust particle conveying capacity is enhanced; transition areas from the two sides to the suction nozzle body are enlarged, so the suction force level is more balanced, and dust particle leakage caused by weak suction force is reduced.

The invention relates to a liquid-gas mixer and a gas-liquid recovery device by employing the liquid-gas mixer, the mixer is composed of a power drive chamber and a jet mixing chamber which are mutually connected, several jet pipes are arranged on a separator plate in the power drive chamber, the inlet end of the jet pipe is positioned on in the power drive chamber, the outlet end is positioned in the jet mixing chamber, the jet mixing chamber is composed of a suction chamber, a reducing pipe, a trunnion and a increasing pipe which are connected in order from up to down or from left to right, a pressure liquid inlet is arranged on the power drive chamber, an inlet of gas to be treated is arranged in the jet mixing chamber, the gas-liquid recovery device comprises the liquid-gas mixer and a pressurization circulating system, and a liquid discharge pipe is connected to a liquid return pipe of the pressurization circulating system. The liquid-gas mixer and the gas-liquid recovery device have the advantages of good liquid-gas mixing effect, low energy consumption, large processing amount and low operation cost, and are especially adapted to liquid substance recovery in a certain gaseous substance, such as recovery of waste vapour in flue gas.

The invention relates to a rotary jet flow aerating agitation device for a jet flow type flotation machine. The rotary jet flow aerating agitation device comprises a feeding pipe, a rotary flow device, a conical nozzle, an initial mixing pipe and a throat pipe which are communicated from top to bottom. Due to the special structural design, when ore pulp is jetted from the nozzle, the three-dimensional speed is achieved, a rotary jet flow is formed and enters the initial mixing pipe to suck air, violent mixing is carried out, meanwhile, air constantly enters through an air inlet of the device, and the aerating process and the initial turbulence mineralization are completed. After the rotary jet flow is jetted, expansion of the rotary jet flow in fluid of surrounding is higher than that of a corresponding swirling-free jet flow, and the sucking capacity and the mixing effect of the rotary jet flow are higher than those of a common jet flow. On the basis of the working principle of the jet flow type floatation machine, the rotary jet flow aerating agitation device can improve the aerating performance and enhance bubble mineralization, and the positive effect on further improving the floatation effect is achieved.

The invention relates to the technical field of air purification, in particular to a segmented pulse backflushing air filter core regenerating system and a segmented pulse backflushing air filter coreregenerating method. The segmented pulse backflushing air filter core regenerating system comprises a dedusting box, filter cores mounted inside the dedusting box, and a pulse gas source arranged onthe outer side of the dedusting box, wherein a gas outlet and a gas inlet are formed in the upper side and the lower side of the dedusting box respectively; a partition board for fixing the filter cores is further arranged inside the dedusting box; the partition board is in interference fit with the dedusting box; inner holes are formed in the partition board; mechanical ash-cleaning pipes are arranged on the partition board at the lower ends of the inner holes; the bottoms of the mechanical ash-cleaning pipes are hermetically connected to the upper ends of the filter cores; a blowing pipe isarranged at the upper end of the dedusting box; the blowing pipe is connected with the pulse gas source; nozzles are formed in the lower end of the blowing pipe and in positions corresponding to the vertical positions of the filter cores. By virtue of segmented pulse blowing, through early release of an auxiliary pulse blowing gas flow, the weakening effect of the filtered gas flow inertia on a main pulse gas flow can be reduced and the entrainment effect of the main pulse blowing gas flow can be enhanced.

The invention discloses a device for organized gas removal through a rain-sewage direct connection system. An urban sewage pipe network is divided into a plurality of subsystems, and in each subsystem, gas blocking devices are installed at a sewage inlet of an inspection well at the most upstream position and at a sewage outlet of an inspection well at the most downstream position, a drainage vertical pipe of a nearby high-rise building is connected to the inspection well at the most upstream position, and a rainwater vertical pipe of the nearby high-rise building is connected to the inspection well at the most downstream position. In each subsystem, vent holes on well covers of the rest of inspection wells other than the inspection well at the most downstream position are blocked. The gasblocking devices each comprise a plurality of blocking plates installed in the sewage pipes, the multiple blocking plates are arranged in sequence from top to bottom, and each blocking plate can be independently rotated. The device for organized gas removal through the rain-sewage direct connection system can effectively improve the ventilation effect in the sewage pipes, is low in cost and convenient to install and use, and provides a new idea and a practical and effective method for treating harmful gas in the urban sewage pipe network.

The invention discloses a coal water slurry flame-free oxygen-enriched combustion system. The system comprises a hearth, a high-speed atomization combustor, a slurry supply system, an oxygen supply system, a flue gas circulating system and a flue gas discharging and recycling system. The high-speed atomization combustor comprises a primary air nozzle, a secondary air nozzle and a coal water slurry atomization nozzle; the slurry supply system comprises a slurry storage tank, a slurry conveying pump, a stirring filter and a slurry supply pump; the oxygen supply system comprises an oxygen tank, a gas heater and a gas pressurizing pump; the flue gas circulating system comprises a flue gas heat exchanger, a dust remover, a circulating draught fan and a condenser; and the flue gas discharging and recycling system comprises a CO2 compression and storage device and a chimney. According to a coal water slurry flame-free oxygen-enriched combustion technology provided by the invention, oxygen is pressurized and heated and is mixed with circulating flue gas, and mixed gas is sprayed into a furnace to form volume combustion; coal water slurry is subjected to heat exchange through the flue gas heat exchanger, so that the initial temperature is improved and ignition heat is reduced; and the problems of a current coal water slurry boiler that the combustion efficiency is relatively low, the emission of NOx is high and the capturing cost of CO2 is high and the like can be solved.

The invention provides a handpiece assembly, an air duct system and a fan. The handpiece assembly comprises an air outlet duct and air guide plates; the air outlet duct is divided into a plurality ofair outlet parts by the multiple air guide plates, and each air outlet part is provided with a first air wall and a second air wall which are arranged opposite to each other; each first air wall comprises a first arc-shaped flow guide surface and a first flow outlet surface which is connected to the first arc-shaped flow guide surface in the air flow direction; each second air wall comprises a second arc-shaped flow guide surface and a second flow outlet surface which is connected to the second arc-shaped flow guide surface in the air flow direction; an air outlet gap is formed between each first flow outlet surface and the corresponding second flow outlet surface; and in the air flow direction, the extension surfaces of the first arc-shaped flow guide surfaces intersect at the second flowoutlet surfaces, and the extension surfaces of the second arc-shaped flow guide surfaces intersect at the first flow outlet surfaces. The handpiece assembly is high in air outlet volume and air pressure.

The invention discloses a square fractal nozzle based on a fractal theory, a flow measurement system and a heat transfer measurement system. The square fractal nozzle based on the fractal theory comprises a nozzle mouth and fractal frame structures. The square fractal nozzle is characterized in that the fractal frame structures are arranged in order according to square fractal geometrical characteristics. The flow measurement system adopts a honeycomb steady-flow section having a certain length and a hot-wire anemometer, the heat transfer measurement system adopt a honeycomb steady-flow section having a certain length and a thermocouple collector, and stability of jet itself and accuracy of experiment data can be guaranteed well. Fractal jet formed in the invention has a large jet cone angle, and the turbulent intensity of a fluid and an entrainment ability to surrounding substances are enhanced well. Experiments show that, in an area involved in the fluid, mixing of impact target surface jet can be significantly increased, and a jet heat and mass transfer process is strengthened.

The invention discloses a single regenerative heating furnace system for reducing NOx emissions. The two sides of a furnace wall of a heating furnace are symmetrically provided with a plurality of burners, coal gas spray pipes of the multiple burners in the same side are in communication to one same coal gas pipe, air spraying openings of the multiple burners in the same side are in communicationto one same air and flue gas pipe, the air and flue gas pipe is connected to an air pipe and a flue gas recovery pipe on the side through a reversing valve, and the flue gas recovery pipe is in communication to an auxiliary flue on the side and is led into a flue gas gathering chamber; and the auxiliary flues are arranged on the two sides of the furnace wall of the heating furnace, the flue gas gathering chamber is provided with two circulating flue gas pipes, each circulating flue gas pipe is in communication to a plurality of circulating flue gas spray pipes on the same side, and each coal gas spray pipe is installed at the center of the corresponding circulating flue gas spray pipe. The single regenerative heating furnace system has the advantages that emission reduction of NOx of the heating furnace is effectively achieved, and the intensity of combustion and the stability of flames are improved.

The invention provides a jet flow self-priming system adjustable in opening degree. The jet flow self-priming system adjustable in opening degree comprises a lower air suction chamber, an upper air suction chamber, a first-stage injector, a first-stage graphene ring, a second-stage injector, a second-stage graphene ring, a third-stage injector, a third-stage graphene ring and a fourth-stage injector, wherein the first-stage injector, the first-stage graphene ring, the second-stage injector, the second-stage graphene ring, the third-stage injector, the third-stage graphene ring and the fourth-stage injector communicate in sequence; the bottom of the first-stage graphene ring, the bottom of the second-stage graphene ring and the bottom of the third-stage graphene ring are all provided with through holes which communicate with a cavity inside the upper air suction chamber; the upper air suction chamber is arranged above the lower air suction chamber, the top wall of the lower air suctionchamber is provided with a rear throat part, and a connection rod air blocking plug is arranged in the upper air suction chamber and used for adjusting the opening degree of an air blocking plug bodyand the throat part. According to the jet flow self-priming system adjustable in opening degree, all the injectors and the graphene rings adopt contraction and diffusion inner diameter combination, thus, the entrainment capacity for gas inside the system can be improved, meanwhile, the entrainment airflow emission amount is increased, and the system self-priming capacity is improved.

The invention discloses a particle image velocimetry (PIV) experimental particle mixing device based on a pneumatic lug technology, which comprises a mixing tank and a filtering element disk for containing PIV trace particles; the filtering element disk is arranged in the mixing tank; moreover, the mixing tank is respectively provided with an air-inlet main pipe and an air outlet pipe, the circumferential direction nearby the position of an outlet of the air-inlet main pipe is evenly distributed with pneumatic lugs, the pneumatic lugs comprise the jetting pipes of the pneumatic lugs and flow-jetting control mechanisms for controlling the jetting flow rate of the jetting pipes of the pneumatic lugs, and the jetting ports of the jetting pipes of the pneumatic lugs are arranged in a way of facing to a main flow area of the air-inlet main pipe; furthermore, the air inlets of the jetting pipes of the pneumatic lugs are communicated with bypass airflow; and moreover, the total pressure of airflow jetted by the jetting pipes of the pneumatic lugs is higher than the total pressure of airflow in the air-inlet main pipe. Therefore, flowing vortex is formed at the positions of the outlets of the jetting pipes by arranging the pneumatic lugs on the air-inlet main pipe according to the PIV experimental particle mixing device based on the pneumatic lug technology, so that the mixing effect of PIV particles in a particle mixer is improved.