31results about How to "Increase velocity gradient" patented technology

Belonging to the technical field of sewage recycling treatment, the invention relates to an integrated device and method for efficient magnesium ammonium phosphate crystallization and solid-liquid separation. A mixed reaction crystallization zone is connected to water intake pumps; a solid-liquid separation zone is disposed between an inner cylinder and an outer cylinder; a buffer zone is under the mixed reaction crystallization zone; an MAP sludge zone is disposed in a cone at the bottom of a reactor, and the bottom is connected to a large aperture valve; a water outlet zone is arranged at the top of the reactor, and employs an overflow water discharge way. The reactor operation includes crystallization reaction and solid-liquid separation processes. The reactor device adopts rapid mechanical stirring way to accelerate crystallization reaction, thus improving the reactor treatment capacity; at the same time, a baffled continuous flow treatment way with the same inflow and outlet waterdirection is employed to prolong the flow path of materials in the reactor, so that the crystallization reaction and solid-liquid separation process can be more complete; by setting an inclined platein the solid-liquid separation zone, efficient solid-liquid separation can be achieved, and MAP loss and secondary pollution can be avoided during water discharge.

The invention provides a high-pressure rotational flow mixing device. The main mixing chamber of the high-pressure rotational flow mixing device is formed by connecting and combining a cylindrical mixing chamber and a conical mixing chamber in series; a liquid inlet pipe is connected with the cylindrical mixing chamber; the liquid inlet pipe is internally provided with a nozzle which can resist a pressure of larger than 10MPa; a solid phase charging opening is formed above the cylindrical mixing chamber; the axis of the solid phase charging opening is perpendicular to that of the nozzle; the outlet of the conical mixing chamber is provided with a mixing baffle plate; the baffle plate consists of 2-6 blades which are distributed at the outlet and have the angle from 20 degrees to 60 degrees relative to the horizontal plane; and the outlet of the conical mixing chamber is connected with the inlet of a constant-current elbow pipe; the elbow pipe is of a diameter-changing structure, wherein the elbow pipe inlet diameter D1/the elbow pipe outlet diameter D2=1.5-1.8, and the curvature radius of the central axis of the elbow pipe R/D=3.0-3.5. The inner wall of the mixing chamber is sprayed with a wear-resistant material mixed with solid particles, so that the abrasive resistance of a chamber body can be improved, the concavity of the spraying surface can be increased, the turbulent condition in the mixing chamber can be enhanced, and the mixing efficiency can be improved.

A secondary flow mixing method for the coagulation procedure features that after the coagulant is added to raw water, the raw water is flowing in the pipeline able to generate secondary flow for mixing under the action of secondary flow. Its apparatus is composed of a coagulant adding tube and a secondary flow pipe which may be a spirally coiled hard tube or a flexible tube wound on a cylindrical body.

Provided is a pulsation swirler with an internally arranged screw rod. The main purpose is to provide swirling separation equipment which is high in separation efficiency, small in equipment size andconvenient to operate and maintain. The pulsation swirler is characterized in that the interrupted screw rod is arranged in the center of a cyclone separator, the interrupted screw rod is of a hollowstructure and is composed of spiral sections and open hole sections in an interval distribution manner, and the spiral rotation direction of the spiral sections is opposite to the rotational flow direction after liquid enters the swirler; a backwash round tube is nested in the interrupted screw rod, open hole sections on the backwash round tube correspond to those of the interrupted screw rod, a top end opening of a hollow part of the interrupted screw rod and the backwash round tube is connected with an overflow port of the swirler, the liquid can enter the internal hollow part through the open hole sections of the screw rod and the backwash round tube, moves upwards and is discharged from the swirler through the overflow port. The swirler can effectively solve the technical problems of small density differences of two-phase media, high viscosity of separation media, low separation accuracy and the like.

The invention discloses a powder particle sorting device and a sorting method. The powder particle sorting device comprises a storage silo and N groups of sorting units (N is larger than or equal to 1). Each group of sorting unit comprises one inclined plate and two material receiving bins connected in parallel; the storage silo is used for storing powder particles to be sorted; in each group of sorting unit, the inclined plate is used for enabling the powder particles flown out from the storage silo to form a stacking layer on the surface of the inclined plate, and enabling continuously flown-out powder particles to form a flowing layer above the stacking layer when the stacking angle reaches to an angle of repose; each two material receiving bins are used for receiving the powder particles flown out from the flowing layer of the corresponding inclined plate at different flow speed ranges; and the vertical interval between a discharge hole of the storage silo and each inclined plate is not lower than the sum of the maximum thickness of each stacking layer and the thickness of each flowing layer. The sorting method is carried out by utilizing the sorting device. The device and themethod provided by the invention can be used for effectively sorting and collecting the powder particles, and have the advantages of simple structure, good separation effect, multiple functions, portability, high efficiency, durability and the like.

The invention belongs to the field of unexploded ammunition destruction and particularly discloses a combined unexploded ammunition energy-gathered destruction device. The combined unexploded ammunition energy-gathered destruction device comprises an end cover, a shell, a main charge, a metal liner and a detachable head jet energy regulator. The end cover is located at the top of the shell and connected with the shell, the metal liner is arranged on the lower portion in the shell, the shell is loaded with the main charge, and the bottom of the main charge makes contact with the top of the metal liner. When an impact induced explosion mode is adopted to destroy unexploded ammunition, the head jet energy regulator is not arranged at the bottom of the shell, and when a deflagration disintegrating or ignition overburning mode is adopted to destroy the unexploded ammunition, the bottom of the shell is connected with the head jet energy regulator. The combined unexploded ammunition energy-gathered destruction device destroys the unexploded ammunition in situ in a contactless mode and can be used in a combined mode according to the type of the unexploded ammunition and the destruction environment conditions, and the disposal effect of impact induced explosion, deflagration disintegrating or ignition overburning on the exploded ammunition is achieved.

The invention discloses a method for preventing an ice-slurry preparing device adopting a super-cooling method from generating ice blockage and a device thereof. An ice-making fluid firstly flows through a fluid pulsation generating device before entering a super cooler, so that flow and pressure of the ice-making fluid generate pulsation; then, the fluid is cooled and super-cooled in the super cooler, and velocity gradient near the wall surface of the super cooler is increased by virtue of the fluid pulsation, so that fluid shearing force is increased, and ice crystal particles are prevented from being adhered on the surface of the super cooler, thereby preventing ice blockage. The device comprises a pulsation generating device, a flow meter, an ice slurry generating device, an ice storage slot, an ice crystal filter device and a related valve. According to the device, the pulsation generating device is mounted in front of the super cooler, so that on one hand, pulsation of the fluid in the super cooler is reinforced, a heat exchange coefficient is increased, formation of an ice layer is avoided, heat exchange thermal resistance is reduced and heat exchange efficiency of the super cooler is integrally improved; and on the other hand, the problem that an ice slurry generating process adopting the super-cooling method is liable to generate ice blockage is solved.

The invention discloses a mixing device for various microbeads, and belongs to the technical field of highway road marking. According to the adopted technical scheme, the mixing device for the variousmicrobeads comprises a pre-mixer, distributing nozzle openings and a scattering device, the pre-mixer is of a tubular structure and is internally provided with spiral sheets, the upper end of the pre-mixer serves as a glass microbead inlet, the lower end of the pre-mixer communicates with the upper ends of the multiple distributing nozzle openings, and the lower ends of the distributing nozzle openings communicate with an inlet of the scattering device; and the scattering device comprises a stirring cavity, a scattering cavity, blade wheels, a scattering shaft, a speed adjusting motor, a first transmission wheel and a second transmission wheel, each of the stirring cavity and the scattering cavity is a cavity body with the open upper end, the open lower end and the sealed periphery, and the lower end of the stirring cavity communicates with the upper end of the scattering cavity. The mixing device for the various microbeads is widely applied to the field of road marking.

The invention discloses an oxygen supply device for aquaculture, and belongs to the technical field of aquaculture. The oxygen supply device comprises a culture tank. The top of the culture tank is provided with an inwardly recessed sliding chute. A water collecting tank is movably connected in the sliding chute. A separator plate is disposed in the culture tank. The surface of the separator plateis provided with a plurality of meshes. An oxygenation device is installed on the upper surface of the separator plate. An air compressor and a circulating pump are respectively disposed at left andright sides of the culture tank and located on supporting frames. Layered oxygen supply is achieved, oxygen requirements of different aquatic products are satisfied, oxygen concentration in culture water can be increased, and impurities in the water can also be filtered to recycle the culture water.

The invention relates to an agglomeration device for heterogeneous condensation and turbulent agglomeration coupling and application thereof. The agglomeration device is generally in a rectangular parallelepiped shape and generally of an axially symmetric structure in the direction of incoming flue gas, the left end of an agglomeration device body is a flue gas inlet and is connected with a desulfurization device, and the right end of the agglomeration device body is a flue gas outlet and is connected with a wet electrostatic precipitator; a plurality of semi-elliptical cylindrical protrusionsare symmetrically arranged on the upper and lower side walls of the rectangular parallelepiped along a central axis of the device body, the upper and lower opposite semi-elliptical cylindrical protrusions serve as a group, there are altogether n groups, and n is greater than or equal to 2; the lowest point of each semi-elliptical cylindrical protrusion faces toward the interior of the device body; a rectangular parallelepiped pin fin is arranged between the first group of semi-elliptical cylindrical protrusions and the flue gas inlet, the center line of the rectangular parallelepiped pin fincoincides with the central axis of the device body, the rectangular parallelepiped pin fin is of a hollow cavity structure, and the upper and lower surfaces of the rectangular parallelepiped pin fin are both provided with a steam nozzle. According to the device, the particle size of ultrafine particles is increased by means of a heterogeneous condensation and turbulent agglomeration coupling mode,and the structure is simple.

The invention belongs to the technical field of aerosol enrichment, and discloses a micron or nano aerosol particle enrichment device which comprises an aerosol particle sample adding micro-channel, an aerosol particle enrichment micro-channel and a sheath airflow micro-channel. The airflow outlet side of the aerosol particle sample adding micro-channel is connected with the airflow inlet side of the aerosol particle enrichment micro-channel; a through hole is formed in the side wall of the aerosol particle enrichment micro-channel and is connected with the airflow outlet side of the sheath airflow micro-channel; a preset included angle is formed between the sheath airflow micro-channel and the aerosol particle enrichment micro-channel, the preset included angle is an acute angle, and the airflow inlet side of the sheath airflow micro-channel extends in the direction from the aerosol particle sample adding micro-channel to the aerosol particle enrichment micro-channel. By arranging the reverse sheath airflow micro-channel, micron or nano aerosol particles quickly move to the center position of the aerosol particle enrichment micro-channel, efficient enrichment is achieved, and great significance is achieved for improving the 3D printing precision and improving the performance of micro-nano components.

The invention relates to a fluid mixer, which comprises a mixer shell. The mixer shell comprises a front wall, a rear wall and a peripheral wall; the front wall and the rear wall are arranged oppositely and are connected through the peripheral wall so as to form a mixing chamber; a fluid input end is arranged on the front wall; a fluid output end is arranged on the peripheral wall; the fluid inputend is perpendicular to the fluid output end. A flow guiding device comprises a flow guiding converter and the fluid mixer. The fluid output end is connected with an input end of the flow guiding converter in a matching way; the fluid mixer is used for uniformly mixing a fluid so as to obtain a mixed fluid; the flow guiding converter is used for lowing the turbulivity of the mixed fluid to a preset range. According to the fluid mixer and the flow guiding device provided by the invention, the fluid can be uniformly mixed so as to be fully mixed, uniform in composition and ideal in turbulivity,the occurrence of the phenomenon of diffused flying of pollutants is reduced, and the sintering processing efficiency is ensured.

The invention discloses a primary air rich-lean separation multi-stage turbulent burner and a working method thereof, and belongs to the technical field of pulverized coal burners. The primary air rich-lean separation multi-stage turbulent burner comprises a central air pipe, a primary air channel, an inner secondary air channel and an outer secondary air channel which are sequentially arranged from inside to outside; a pulverized coal dense-thin separation device and a primary air channel partition plate are arranged in the primary air channel; inner primary air rotational flow blades are arranged in the inner primary air channel, outer primary air rotational flow blades are arranged in the outer primary air channel, and the rotational flow strength of the outer primary air rotational flow blades is larger than that of the inner primary air rotational flow blades; secondary air rotational flow blades are arranged in the inner secondary air channel; and an outlet of the outer primary air channel is provided with an outer primary air flaring, an outlet of the inner secondary air channel is provided with an inner secondary air flaring, and an outlet of the outer secondary air channel is provided with an outer secondary air flaring. The problems that an existing pulverized coal boiler is low in pulverized coal burn-off rate, difficult to adapt to inferior coal, poor in combustion stability and high in NOx emission amount are solved through dense-thin separation and a multi-stage rotational flow structure.