36 results about "Mass exchange" patented technology

The embodiment of the invention relates to the field of cooling devices of pressure vessels, in particular to an oxygen control device, a lead-bismuth reactor and a method for adjusting the oxygen content of lead-bismuth alloy in the reactor. According to the oxygen control device provided by the embodiment of the invention, the oxygen content data of the lead-bismuth alloy in the container is measured and obtained in real time by arranging the measuring piece and the control assembly, and then the oxygen content level in the container is adjusted in real time by utilizing the deoxygenation mass exchanger and the oxygen release mass exchanger; therefore, the oxygen concentration in the lead-bismuth alloy is accurately maintained in a preset range, so that stable operation of a cooling system is ensured; the closed space is formed among the container, the oxygen removal mass exchanger and the oxygen release mass exchanger, so that the oxygen content adjustment process of the lead-bismuth alloy is realized in a closed environment, impurities are prevented from being mixed in, and the quality of the lead-bismuth alloy is ensured. According to the lead-bismuth reactor provided with the oxygen control device, the content of oxygen in the lead-bismuth alloy can be actively adjusted, and long-term stable operation of the reactor is achieved.

The present disclosure provides systems and methods for accelerating the aging and / or drying process of making aerogels via the use of an external electric field to induce an electro-osmotic flow inside the pores of an alcogel, rather the relying solely on diffusion-limited mass exchange. To overcome the time and cost of conventional aerogel manufacturing that requires long, involved, and costly processing, the present disclosure provides systems and methods for generating a potential difference across the alcogel to induce advection inside the pores.

The invention relates to a method for coating at least one mass exchange device (1) with an exchange chamber (2) in which at least one material-permeable membrane (3) is arranged and which is divided by the membrane (3) into a first and a second chamber area (2a, 2b), wherein a liquid coating agent (9) is filled into one of the chamber areas (2a, 2b) and deposited on the surface and / or into the pores (3a) of the membrane (3) on the side of the membrane (3) associated with the chamber area (2a, 2b), after which excess coating agent (9) is removed from the chamber area (2a, 2b), wherein a reservoir (7) containing the coating agent (9) is connected to an inlet connection (8a) of one of the chamber areas (2a, 2b), wherein the volume of the coating agent (9) entering the chamber area (2a, 2b) to be coated is smaller than the total fillable volume of the chamber area (2b).to which the reservoir (7) is connected, and by means of an acceleration force exerted on the coating agent (9) the coating agent (9) is driven as a bolus (5) from the inlet connection (8a) to an outlet connection (8b) of the chamber area (2a, 2b) along the at least one membrane (3) through the chamber area (2a, 2b), wherein the volume of the bolus (5) decreases as it passes through the chamber area (2a, 2b) due to the deposition of coating agent (9) on the surface and / or the incorporation of coating agent (9) into the pores (3a) of the membrane (3), and at the outlet connection (8b) the bolus (5) exits the chamber area (2a, 2b) with a residual volume.

The utility model discloses a circular-truncated-cone-shaped bonding point oblique folded wave cross-flow type cooling tower packing sheet which comprises a water inlet unit, a water outlet unit, an air inlet unit, an air outlet unit and a flow channel unit, and the water inlet unit and the water outlet unit are arranged on the upper side and the lower side of the cooling tower packing sheet respectively. The air inlet unit and the air outlet unit are arranged on the left side and the right side of the cooling tower packing piece respectively, the flow channel units are a plurality of oblique folded wave hysteresis wave grooves which are sequentially arranged, the direction of each section of flow channel of each hysteresis wave groove is obliquely downward, and each flow channel unit comprises an oblique folded wave peak flow channel unit and an oblique folded wave valley flow channel unit which are sequentially and transversely arranged in a penetrating mode from top to bottom. The oblique folding wave peak flow channel unit and the oblique folding wave valley flow channel unit are connected with the air inlet unit and the air outlet unit on the two sides; and a circular-truncated-cone-shaped bonding point structure is further arranged on the runner unit. The cooling surface area in unit volume is increased, so that the contact surface area of the water film and the filler is further increased, the water film discharge speed is reduced, the heat and mass transfer time is prolonged, and the cooling effect is improved.

The utility model relates to the technical field of fresh air heat recovery, in particular to a heat and mass transfer core body with gradually-changed air duct spacing. The core comprises a plurality of core units stacked in the same direction, each core unit comprises two single-layer structures arranged in a countercurrent mode and a heat and mass transfer membrane arranged between the two single-layer structures, and each single-layer structure comprises a frame and a plurality of separation ribs arranged in the frame. A plurality of air channels are formed between the frame and the separation ribs and between every two adjacent separation ribs, and the intervals of the air channels are distributed in a gradually changing mode; the air duct with the largest interval is the air duct which is firstly contacted when outdoor fresh air enters the heat and mass transfer core body, the air duct with the smallest interval is the air duct which is finally separated when the outdoor fresh air is discharged out of the heat and mass transfer core body, the gradual change rule from the air duct with the largest interval to the air duct with the smallest interval is that the interval is gradually reduced, and the reduction proportion is gradually increased. According to the technical scheme, efficient heat energy recovery can be achieved, and the air circulation efficiency of the system can be kept.

This invention discloses a 58 Co、 60 The calculation method, system, and medium for Co accumulation in the resin bed are as follows: S1, simplify the operating environment of the ion exchange column; S2, analyze the mass exchange relationship within the ion exchange column to obtain a simplified mathematical model, and approximate the solution of the simplified mathematical model to obtain the ion exchange model; S3, analyze the mass balance and transport relationship within the ion exchange column to obtain a simplified mathematical model, and approximate the solution of the simplified mathematical model to obtain the mass conservation model within the bed; S4, calculate the... 58 Co、 60 The accumulation of Co in the resin bed over time. This invention analyzes the mass exchange relationships, mass balance, and transport relationships to obtain an ion exchange model and a mass conservation model within the bed, enabling calculations of... 58 Co、 60 The accumulation of Co in the resin bed over time provides support for predicting the radiation risks posed by the accumulation of activation corrosion products to equipment and maintenance personnel.

The single-cone evaporator comprises an evaporator shell, a stirring mechanism and a heating mechanism, the evaporator shell is in a single cone shape, a feeding port is formed in the top of the evaporator, a discharging port is formed in the bottom of the evaporator shell, and the stirring mechanism comprises a motor, a speed reducer, a stirring shaft and variable-diameter helical ribbon stirring blades. The motor is connected with the stirring shaft through the speed reducer, the stirring shaft extends into the evaporator shell, and the variable-diameter helical ribbon stirring blade is installed on the stirring shaft and matched with a conical inner cavity in the evaporator shell. The variable-diameter helical ribbon stirring blades matched with the conical inner cavity in the evaporator shell can solve the common stirring problem, residues roll over on the helical ribbon and cannot cake, heat and mass transfer is not affected, gaps between the variable-diameter helical ribbon stirring blades and the inner wall of the evaporator shell are small, the residues cannot be attached to the inner wall of the evaporator shell, and the heat exchange efficiency is not affected.

The present invention relates to a cooling system (1) for immersion cooling of electronic components, wherein the cooling system (1) is - A container (3) that can be filled with a two-phase heat transfer fluid, in which electronic components can be immersed in the liquid phase, and which has a gaseous space on the surface of the liquid heat transfer fluid, -A heat exchanger is provided within the gas space of container (3) and forms a liquid heat transfer fluid. -At least one condenser unit (7), the condenser unit (7) is in contact with the gas space of the container (3) by at least one fluid inlet opening (71) and at least one fluid outlet opening (72) for mass exchange of a gaseous medium to the condenser unit (7) and a liquid medium from the condenser unit (7), and comprises at least one condenser unit (7) having an outlet (79) for discharging the residual gas phase, - The condenser unit (7) is housed in a housing (74) that encloses a bundle of tubes (73) having heat exchanger tubes (731) extending parallel to each other in the axial direction behind at least one fluid inlet opening (71) in the flow direction (S), thereby forming a flow path (75) within the housing (74). - The tube bundle (73) is arranged inside the housing (74) such that the gaseous medium flows in the flow path (75) along the axial direction of the heat exchanger tube (731).

Systems and methods for separating components from a mixed gas stream in an indirect contact heat exchanger by a combination of direct contact heat and mass exchange are disclosed. The contact liquid stream wets an inner surface of a treatment channel that indirectly contacts the heat exchanger, and the mixed gas stream passes through the treatment channel, contacts the contact liquid stream for heat and mass exchange. Refrigerant in the refrigerant channel of the indirect contact heat exchanger is used for heat exchange with contact liquid.

The invention provides a high-speed fuel mixing enhancing device and method based on active jet flow control, and belongs to the technical field of high-speed propulsion. The device comprises an upstream pre-control jet flow unit arranged on the upstream of a fuel injection opening and a downstream distributed enhanced jet flow unit arranged on the downstream of the fuel injection opening. An incoming flow boundary layer is pre-modulated through upstream jet flow, and favorable initial conditions are created for fuel injection; after fuel is jetted, a flow field is continuously and actively intervened through a plurality of downstream jet flow holes, a vortex structure is generated and enhanced, flow layering is broken, and momentum and mass exchange is promoted. According to the invention, active and accurate regulation and control of a high-speed fuel mixing flow field can be realized, and the mixing uniformity and efficiency are obviously improved.

The invention relates to a method and a device for calculating a mass exchange coefficient between bedrock and a fracture in an underground reservoir, and belongs to the technical field of seepage simulation of fracture type underground reservoirs. The method for calculating the mass exchange coefficient between the bedrock and the fracture in the underground reservoir comprises the following steps: performing embedded grid division on a bedrock region and a fracture region in the underground reservoir, and determining a connection pair between a fracture grid and a bedrock grid; based on the permeability of the bedrock grid corresponding to the connection pair, determining a Green element function under a bedrock grid permeability main axis coordinate system; source item coordinates in the Green element function are used as variables, integration is conducted on the Green element function along the fracture grids belonging to the same connection pair, and a pressure response function is determined; and based on the pressure response function, determining the conductivity between the bedrock grid and the fracture grid corresponding to the connection pair. According to the method, the calculation precision of mass exchange between the bedrock and the fracture in seepage simulation of the embedded discrete fracture model can be remarkably improved.

The invention provides a portable soil source water drawing device using a day and night natural condensation method in a semi-arid region and a using method, the portable soil source water drawing device comprises a mass exchange cylinder, a high light transmission ball cap is arranged at the top of the mass exchange cylinder, the lower part of the mass exchange cylinder is embedded in a soil body, a high heat conduction probe is arranged on the outer surface of the high light transmission ball cap, and the high heat conduction probe is embedded in the soil body. Through holes are evenly formed in the mass exchange barrel, a coil pipe is wound on the outer wall of the mass exchange barrel, a hot air inlet valve is arranged at the inlet end of the coil pipe, the outlet end of the coil pipe is connected with an air exhaust pipe, the air exhaust pipe is arranged in the center of the mass exchange barrel and extends out of a high-light-transmittance ball cap, and an exhaust port one-way valve is installed at the top end of the air exhaust pipe. A water condensation and catchment groove is formed in the lower portion in the high-light-transmission ball cap and connected with a water collection device. The device is mainly applied to drawing water from soil in arid and semi-arid environments, the principle that the moisture absorption capacity of air is increased along with temperature rise is utilized, the soil is heated in the daytime, the moisture absorption capacity and moisture content of the air in the regional soil are increased, and the air is used for cooling fast and condensing water drawing at night.

The invention relates to the technical field of food processing, and discloses a marinating pot for stewing marinating soup and a preparation process of spice marinating soup, and the preparation process comprises the following steps: preparing the marinating pot, pretreating spices, preparing a marinating soup basic solution, stewing the marinating soup and post-treating the marinating soup. According to the invention, an electromagnetic induction heating mode adopted by the marinating pot and a high-precision temperature control system cooperate with each other, so that uniform transfer of heat in a boiling process can be realized, and a stable thermodynamic environment is created for sufficient dissolution and conversion of various flavor substances in spices; the special vertical and horizontal combined stirring design is combined, the manual stirring effect is simulated, it is guaranteed that materials in the pot are evenly heated, sufficient heat and mass transfer is achieved, the phenomena of flavor deterioration and charring caused by local overheating are avoided, the flavor purity and taste plumpness of marinated soup are improved, and the market competitiveness of the marinated soup is improved. The layering sense, the harmony and the stability of the flavor of the marinated soup are enhanced by implementing a refined boiling process with staged variable temperature and variable stirring strength.

This application discloses a self-sustaining, low-power, long-endurance unmanned underwater vehicle (UUV). In this technical solution, the UUV propels itself forward by underwater gliding. During underwater gliding, the effective angle of attack is small, and drag is low, making it a low-energy propulsion method; a small altitude difference can achieve a large propulsion distance. There is no mass exchange between the UUV and its surroundings, and its own weight remains essentially constant, reducing the possibility of water leakage. Furthermore, the expansion joint itself is elastic, capable of storing the compressive energy of the surrounding fluid, reducing its own energy consumption. The UUV utilizes different flapping fin positions and angles of attack to achieve forward and backward maneuvers during buoyancy, providing greater flexibility. The UUV only consumes electrical energy when the electric motor is operating; it consumes no energy for most of the gliding process. The electrical energy can be derived from the fluid energy of the surrounding water flow, allowing the UUV to achieve ultra-long endurance.

The invention belongs to the technical field of bran steaming equipment, and particularly relates to a vertical scraper type bran steaming machine which comprises a supporting frame, a spreading and cooling section, a cooking section, a steam collecting cover, a discharging port and a feeding hopper, the spreading and cooling section comprises at least one layer of spreading and cooling area, and the cooking section comprises multiple layers of cooking areas and moisture removal areas arranged between every two adjacent layers of cooking areas. According to the invention, the path and retention time of rice hulls in the single-layer cooking area are prolonged, the cooking sufficiency is improved, meanwhile, the scraper conveying also has a turning effect, the heat and mass exchange uniformity is promoted, the number of layers of the cooking area is reduced, the equipment height, the manufacturing cost and the equipment operation energy consumption are reduced, material blockage is not easy to occur, and the production efficiency is improved. According to the utility model, the production continuity and stability are ensured, and the cooking environment of each layer of cooking area can be effectively controlled, so that heat of steam cannot be quickly lost, the steam consumption is reduced, the situation that waste gas rises to the upper layer of cooking area to interfere the process is avoided, and the cooking uniformity and efficiency are improved.

The utility model discloses a rectification multistage tower which comprises a tower body and a preheater, the tower body comprises a first-stage tower, a second-stage tower, a third-stage tower, a fourth-stage tower and a fifth-stage tower, the first-stage tower, the second-stage tower, the third-stage tower, the fourth-stage tower and the fifth-stage tower are respectively communicated with the preheater through pipelines, the first-stage tower is communicated with the second-stage tower through a pipeline, the second-stage tower is communicated with the third-stage tower through a pipeline, and the third-stage tower is communicated with the fifth-stage tower through a pipeline. The third-stage tower is communicated with the fourth-stage tower through a pipeline, the fourth-stage tower is communicated with the fifth-stage tower through a pipeline, a first-stage pump is arranged at the lower end of the first-stage tower, a second-stage pump is arranged at the lower end of the second-stage tower, a third-stage pump is arranged at the lower end of the third-stage tower, a fourth-stage pump is arranged at the lower end of the fourth-stage tower, and a fifth-stage pump is arranged at the lower end of the fifth-stage pump. The first-stage tower, the second-stage tower, the third-stage tower, the fourth-stage tower and the fifth-stage tower are all of square structures and are arranged side by side. The technical scheme is reasonable in structural design, compact in structure, low in height, high in heat and mass transfer efficiency, easy to maintain and good in practicability.

The present application relates to heat mass exchange equipment detection technical field, disclose a kind of method and device for testing packing performance, method includes the following steps: adjusting system to run to dynamic heat balance state;Utilize air state detection mechanism to carry out physical mixing sampling to cross section air to obtain average dry-wet bulb temperature, and simultaneously collect inlet and outlet water temperature;Air is shaped after passing through flow equalizer, average dynamic pressure is collected through physically connected wind pressure detector and actual air mass flow is calculated;Based on the acquisition parameter, according to heat transfer mass transfer theory, the numerical integral is carried out to calculate packing performance test constant;Finally, through multi-working condition test and curve fitting, general performance characteristic equation is established.The present application effectively solves the measurement error problem caused by airflow distribution uneven by air physical mixing sampling and airflow homogenization pressure measurement, improves the accuracy of thermodynamic parameters and flow calculation, and the characteristic equation generated has higher engineering application value.

The invention provides a gas-liquid heat and mass transfer and separation system, and belongs to the field of gas-liquid separation. An air inlet of the supergravity device and / or a liquid inlet of the supergravity device are / is connected with the feeding pipe group; the air outlet pipe is connected with an air outlet of the supergravity device; a liquid inlet of the gas-liquid separator is connected with a liquid outlet of the supergravity device; and the liquid outlet pipe is connected with a liquid outlet of the gas-liquid separator. The invention aims to solve the problems of large occupied space, high construction cost and the like of the gas-liquid heat and mass transfer and separation system in the prior art. The technical effects that the occupied space is effectively saved, and the construction cost is reduced are achieved.

The invention relates to the technical field of geothermal development, and discloses a U-shaped well heat and mass transfer numerical simulation method. Comprising the following steps: collecting parameters such as formation lithology, porosity and permeability to construct a three-dimensional heterogeneous formation model; establishing an in-well fluid Navier-Stokes equation, a stratum heat conduction equation, a dissolved mass diffusion equation and a coupling model of a heat / mass exchange boundary; starting a discrete heat boundary according to lithologic interface heat conductivity coefficient jump greater than or equal to 50%, and starting a heat flux maintaining boundary according to well inlet temperature change rate greater than or equal to 5 DEG C / h; unstructured grids are adopted, and well periphery grids are compacted to be smaller than or equal to 1 m; initializing a temperature field and well inlet parameters according to the geothermal gradient; iteratively solving by combining a finite volume method with a k-epsilon turbulence model (convergence precision is less than or equal to 10 <-6 >); and comparing actual measurement data optimization parameters, and adjusting the stratum heat conductivity coefficient or the grid density when the deviation is greater than 5%. According to the method, a heterogeneous stratum heat transfer mechanism is accurately described, and the reliability of geothermal engineering design is improved.

The invention discloses a dechlorination reaction device for coal-to-methanol synthesis gas, and relates to the technical field of dechlorination reactors, preliminary dechlorination is realized through multi-stage bed pretreatment of a first-stage dechlorination device, and a bionic wriggle module of a second-stage dechlorination device is combined with rotation driving and periodic extrusion reset actions to realize dechlorination. Uniform contact of gas is ensured through rotation in the circumferential direction, channeling is avoided, micropore-level forced substance exchange is formed through periodic pressing and suction in the depth direction, three-dimensional dynamic contact is achieved, and compared with a static or one-way dynamic contact mode of a static bed or a single rotating bed, the contact efficiency is greatly improved. According to the mode, the contact area and the contact efficiency of the gas and the adsorbent are greatly improved, micropore-level deep dechlorination can be realized, the residual quantity of chloro compounds in the synthesis gas is effectively reduced, and the strict requirement of a subsequent process for preparing methanol from coal on raw material gas is met.

The utility model discloses an internal cooling type solution heat exchanger. The heat exchanger comprises a frame, a plurality of transversely arranged heat exchange tubes are arranged on the frame, the two ends of each heat exchange tube are connected with a liquid inlet tube and a liquid outlet tube respectively, a plurality of filler plates are vertically arranged on the inner side of the frame at intervals, and the heat exchange tubes penetrate through through holes in the filler plates. The packing plate is arranged on the outer side of the heat exchange tube, so that a relatively stable liquid film can be formed on the surfaces of the packing plate and the copper tube while heat and mass exchange with a solution is realized, the contact area between the solution and air is increased, and heat and moisture exchange with the air is facilitated; the formation-disturbance-damage-formation process of the liquid film is repeatedly carried out, so that heat transfer and mass transfer of air and the liquid film are enhanced; no filler needs to be additionally arranged in the solution box, the size of the solution box can be reduced, then the size of the dehumidification unit is reduced, and cost and installation space are reduced.

The utility model relates to the technical field of air purification, in particular to a quality exchange energy-saving ultra-clean fresh air conditioner which comprises an outer shell, an inner shell is arranged in the outer shell, and a plurality of refrigerating coils are arranged between the outer shell and the inner shell. A plurality of air volume adjusting valves are arranged on the outer shell, a draught fan and an HEPA filter are arranged in the inner shell, and the draught fan drives air to pass through the refrigerating coil and the air volume adjusting valves to be exhausted through the HEPA filter. An air outlet is formed in the front side wall of the outer shell, an HEPA filter is fixed in the air outlet, and an opening in the front end of the inner shell is fixedly connected and communicated with the HEPA filter; the utility model has the beneficial effects that the problems that the efficiency is low, total heat exchange cannot be directly carried out, fresh air pollutants cannot be diluted, and then the fresh air pollutants are uniformly treated by the high-efficiency filter to form good air are solved.

This invention relates to an integrated device for enhanced generation and rectification using ultrasonic oscillation atomization coupling, comprising a rectification section and a generation and stripping section. The rectification section, from top to bottom, includes a vapor outlet, a reflux inlet, a trough-type solution distributor, an oscillating atomizing packing ring, and a tray. The generation and stripping section, from top to bottom, includes a concentrated solution inlet, a collector, a perforated solution distributor, an inclined falling film tube, an annular ultrasonic atomizer, an annular ultrasonic oscillator, a perforated plate, a dilute solution outlet, and a heating water inlet. The oscillating atomizing packing ring, through the synergistic effect of high-frequency ultrasonic atomization and medium-to-low-frequency ultrasonic oscillation, increases the mass transfer area and mass transfer driving potential energy of the rectification section, thereby improving its performance. The annular ultrasonic atomizer facilitates heat and mass exchange between the atomized droplets and the rising vapor, whose temperature decreases progressively along the falling film height, replacing the stripping process in the rectification column. The annular ultrasonic oscillator overcomes the problem of reduced mass transfer driving potential of the falling film solution caused by the atomized droplets in the generation and stripping section.

This invention relates to the field of nuclear reactor technology, and more specifically, to an oxygen concentration control device and method. The device includes a mass exchanger, a reactor vessel, a reaction atmosphere pretreatment loop, a liquid level regulation loop, an oxygen sensor, and a heating assembly. The mass exchanger includes a first cylindrical structure and a second cylindrical structure. The method includes controlling the reaction atmosphere pretreatment loop to purge the air from the reactor vessel cavity and fill it with an inert gas; obtaining the oxygen concentration value within the reactor vessel cavity; comparing the oxygen concentration value with an oxygen concentration range; and controlling the periodic change of the liquid level in the mass exchanger through the liquid level regulation loop. This invention improves the safety and stability of the oxygen concentration control device.

The invention relates to a device for mass exchange comprising a housing with at least one exchange chamber with an arrangement of a plurality of material-permeable hollow fibers, in which the outer walls of the hollow fibers are sealed at the spaced-apart end regions of the hollow fibers to each other and at least partially to a wall region of the exchange chamber by means of at least one outer sealing region made of a sealing agent, wherein the exchange chamber is divided into two chamber regions, wherein the hollow fibers in the first chamber region are open to flow around by a first exchange medium on the outside and in the second chamber region are open to flow through by a second exchange medium on the inside, wherein the first chamber region is divided into at least two sub-chambers, each comprising a partial volume of the first chamber region.Between which, in the arrangement of hollow fibers, at least one inner sealing region is formed from a sealing agent that contacts the outer walls of the hollow fibers, wherein at least one pair of two movable switching means is arranged in the first chamber region, between which the arrangement of hollow fibers lies, wherein each switching means can be brought into or out of contact with at least one inner sealing region by movement, wherein, when contact exists, the partial chambers are separated from one another and, when no contact exists, the partial chambers are fluidically connected in parallel. The invention also relates to a method for producing a hollow fiber package.

This invention discloses a rotary kiln with a built-in guide plate based on uniform material roasting, belonging to the field of rotary kiln control technology. It includes a rotary frame and a rotary drum. The rotary frame has guide wheels movably connected to both sides via bearings, and a rolling ring is fixedly fitted in the middle of the rotary drum. This invention, through a built-in, real-time adjustable telescopic baffle and a unique zoned temperature control structure, collaboratively solves the common problems of uneven material heating and process rigidity during rotary kiln roasting. By using a rotary control mechanism to precisely adjust the height of the telescopic baffle, it actively controls the radial throwing and axial movement of the material, greatly enhancing the heat and mass exchange between the material and the hot airflow, significantly improving roasting uniformity and thermal efficiency, and fundamentally improving product consistency. Furthermore, the adjustable baffle and dividing plate divide the drum into two independent temperature zones, and precisely control the transfer of material between zones, realizing the integration and rapid switching of multiple heat treatment processes such as preheating, reaction, and sintering.

The invention relates to the technical field of rare earth oxides, and provides a preparation method of rare earth oxide powder. The preparation method comprises the following steps: by taking oxalic acid as a precipitator, carrying out precipitation reaction by adopting an airflow precipitation reactor to obtain an oxalic acid rare earth precursor, and calcining the oxalic acid rare earth precursor to obtain rare earth oxide powder. According to the method, the airflow precipitation reactor is used for carrying out precipitation reaction, substance exchange and mixing in the precipitation reaction are promoted through the disturbance effect of gas on liquid, the precipitation reaction is more uniform and sufficient, an oxalic acid rare earth precursor with the smaller particle size is obtained, and then the rare earth oxide powder with the large specific surface area can be obtained through calcination. The result of the embodiment shows that the specific surface area of the prepared rare earth oxide powder reaches 20.586-52.499 m < 2 > / g, and the particle size is uniform.

This invention discloses a gas-liquid mixing evaporation device based on cyclone annular atomization, belonging to the field of fluid heat and mass exchange technology. It includes an airflow carrier channel with an axially arranged channel for the main airflow to flow axially. A tangential airflow inlet is provided on the side wall of the airflow carrier channel to introduce external airflow. The direction of the external airflow entering the channel forms an angle with the radial direction of the airflow carrier channel, thereby inducing the formation of an annular rotating cyclone field within the airflow carrier channel. By constructing an annular atomization zone perpendicular to the main airflow, this invention extends the droplet residence time by more than 30% compared to traditional coaxial spray devices. Combined with the secondary breaking effect of the cyclone field, the evaporation efficiency can be improved by 25%-40%. It integrates cyclone generation, secondary atomization, and main flow transport functions into a single channel, eliminating the need for complex multi-channel systems. The device is small in size, has low pressure drop, is easily integrated with existing systems, and can adapt to different flow and pressure conditions.

This application discloses a convective material exchange bioartificial liver system: a plasma separation pathway including a plasma separator, an arterial line, and a venous line; a biological purification pathway including a first bioreactor, a solid-liquid separator, a pre-purification line connecting the first inlet of the first bioreactor to the original plasma outlet of the plasma separator, a post-purification line connecting the purified outlet of the first bioreactor to the separation inlet of the solid-liquid separator, and a return line connecting the net plasma outlet of the solid-liquid separator to the venous line; and a biological regeneration pathway including a second bioreactor, a hepatocyte recovery line connecting the recovery inlet of the second bioreactor to the hepatocyte outlet of the solid-liquid separator, and a biological supply line connecting the regeneration outlet of the second bioreactor to the second inlet of the first bioreactor; the first inlet and the second inlet are opposite each other in the first bioreactor, thereby creating a convective material exchange state inside the first bioreactor.

Title of the invention: Liquid distributor for heat and mass exchange column. A liquid distributor (1) comprises a lower plate (P) provided with orifices through which a liquid leaves the distributor to irrigate a lower element, parallel parallelepiped chimneys (C) dedicated to the passage of the ascending gas, thus delimiting liquid channels above the lower plate, these chimneys being provided with closing means on the upper part allowing the liquid to be diverted, the chimneys are distributed over a central circular section of the lower plate, creating a peripheral channel on the perimeter of the lower plate fluidly connected to the channels, a plurality of plates (R1, R2), each plate having an elongated rectangular shape with two ends, with two plates per channel,the plates being oriented at an acute or zero angle to the horizontal characterized in that the total length of the two plates present in a channel is less than 85% of the length of the channel, so that the plates of each channel are spaced apart from each other. [FIG.2]