190 results about "Air liquid interface" patented technology

The invention discloses a gas self-excitation modulation device, an enhanced pollution aeration treatment system and an application method of the enhanced pollution aeration treatment system, through the arrangement of the gas self-excitation modulation device, intermittent modulation airflow matched with an orifice bubble generation process is formed, the instantaneous pulse acting force for upward separation of bubbles is increased, the bubble generation time is shortened, and the aeration bubble size is reduced; and the mass transfer rate of the gas-liquid interface is further improved. According to the invention, the existing laid aerator does not need to be replaced, the aerator material does not need to be modified, and the method is widely applicable to microporous aerators in any form; a water phase does not need to be driven to flow, so that energy consumption is greatly reduced, and adverse disturbance to a target water body is avoided; compared with a gas dissolving method and a jet flow air entraining method, the technology only drives a gas phase to enter a liquid phase, energy is saved, and meanwhile full-amount treatment of target liquid can be achieved. In addition, through sectional arrangement of the oscillation cavity self-excitation unit and the outflow unit, batch application can be carried out.

The invention discloses a space variable gravity fluid storage tank in-orbit motion simulation experiment device in the technical field of space in-orbit fluid management, and the device comprises an experiment storage tank which is used for storing experiment fluid; the experiment storage box is transparent, so that a gas-liquid interface in the storage box can be observed outside the experiment storage box; the rotating mechanism is used for driving the experiment storage box to rotate so as to adjust the included angle between the experiment storage box and the centrifugal acceleration direction of the variable-gravity centrifugal platform and simulate the morphology change of a gas-liquid interface during rotating motion; the vibration mechanism is used for driving the experiment storage tank and the rotating mechanism to simultaneously perform linear reciprocating motion so as to apply translation and low-frequency vibration disturbance to the experiment storage tank and simulate the gas-liquid interface morphology change and instability phenomenon in the process that the gas-liquid interface is disturbed by external force; the experiment storage box, the rotating mechanism and the vibrating mechanism are all installed on the variable-gravity centrifugal platform.

The invention discloses a micropore bubbling aeration two-stage oscillation modulation synergistic system and an application method thereof. The modulation synergistic system comprises a two-stage oscillation device, an air supply unit connected to the upstream of the two-stage oscillation device, and a micropore coil pipe and an aeration tank which are connected to the downstream of the two-stage oscillation device. The two-stage oscillation device comprises a non-feedback oscillation cavity connected with the branch section, a sound wave oscillation cavity sequentially connected with the air inlet section, and a cavity connecting section connected with the non-feedback oscillation cavity and the sound wave oscillation cavity in parallel. Controlled pulsating oscillation airflow is injected into the microporous aeration system through the two-stage oscillation device, and periodic inertia force disturbance is introduced in the bubble generation stage; the pulsating pressure field breaks through gas-liquid interface force balance under traditional steady-state airflow, so that the bubble separation critical size is remarkably reduced, hole opening air film oscillation is accelerated through high-frequency pressure oscillation, necking fracture is promoted, and the bubble separation size is reduced; and meanwhile, transient shear force generated by the pulsating airflow inhibits interaction of adjacent bubble wake flows, and the coalescence probability is reduced.

The invention discloses a sediment type salt cavern gas storage gas-liquid interface depth prediction method. The method comprises the following steps that S1, a change curve of brine discharge flow along with time is obtained through on-site monitoring; s2, determining the mining form of the salt cavern cavity, and obtaining a change curve of the effective cross section area of the cavity brine along with the depth; s3, respectively calculating gas-liquid interface depths when the gas-liquid interface is in the gas injection well and does not enter the salt cavity, when the gas-liquid interface is in the pure brine space at the upper part of the salt cavity and does not enter sediment, and when the gas-liquid interface is in the sediment accumulation space; s4, judging whether the gas-liquid interface depth obtained through calculation in S3 meets a corresponding application interval or not, and obtaining a gas-liquid interface depth value; the gas-liquid interface depth of the pure brine space on the upper portion of the salt cavern can be detected, the gas-liquid interface depth of the sediment accumulation space can also be detected, and gas-liquid interface depth detection of the whole space of the inner cavity of the sediment type salt cavern gas storage is achieved.

The invention discloses an off-axis visual quantitative observation experiment storage tank in the technical field of space on-orbit fluid management, which comprises an upper half storage tank and a lower half storage tank which are fixedly connected, and a sealing ring is arranged between the upper half storage tank and the lower half storage tank; box bodies of the upper half storage box and the lower half storage box are made of transparent materials, so that the gas-liquid interface morphology in the box bodies can be observed outside the box bodies; the volume of the upper half storage tank is larger than that of the lower half storage tank, so that the center of the experimental storage tank is positioned in the upper half storage tank, and the gas-liquid interface morphology at the maximum axial section of the center in the experimental storage tank can be observed from the upper part of the experimental storage tank; a liquid inlet and a liquid outlet of the experiment storage tank are formed in the lower half storage tank, so that observation sight is prevented from being blocked.

The invention provides an ultrasonic gas-liquid interface detection system and method based on frequency tracking, and relates to the technical field of gas-liquid interface detection.The system comprises an ultrasonic transducer, and a probe of the ultrasonic transducer is arranged on a to-be-detected gas-liquid interface; the signal generation module is electrically connected with the ultrasonic transducer; the motor driving module is electrically connected with the motor, and the ultrasonic transducer is fixed on an output shaft of the motor; the signal acquisition module is electrically connected with the ultrasonic transducer and is used for acquiring working current and working voltage of the ultrasonic transducer; a frequency tracking module; a control system module; the signal generation module, the motor driving module, the signal acquisition module and the frequency tracking module are electrically connected with the control system module. The control system module performs phase difference detection according to the working current and the working voltage acquired by the signal acquisition module, and controls whether the resonant frequency emitted by the frequency tracking module is changed or not to judge whether the probe reaches the gas-liquid interface to be detected, so that the liquid level can be efficiently and sensitively detected.

A rapidly constructed three-dimensional model of a microbial film exposed at an air-liquid interface and a preparation method thereof, as well as a hydrogel bead containing microorganisms immobilized at an air-liquid interface in an exposed state and a preparation method thereof. The model includes a hydrogel material containing gradually releasable nutrients, as a core scaffold; a hydrogel film attached to a surface of core and wrapping microorganisms, as a biofilm-like film; and an antimicrobial polyelectrolyte layer between the biofilm-like film structure and the core structure which allows substances in the core to be released into the biofilm-like film structure while preventing the microorganisms on the film from migrating to the core material, ensuring uniform distribution of the microorganisms on the surface of the core and maintaining the microorganisms continuously exposed at the air-liquid interface.

The invention relates to the technical field of compressed air energy storage salt cavern engineering, and provides a compressed air energy storage salt cavern cavity air-tight seal monitoring method and system, and the method comprises the steps: S1, monitoring preparation; s2, sealing and monitoring brine; s3, gas seal monitoring of the injection-production string; s4, open hole section air-tight seal monitoring; when the three kinds of monitoring meet the requirements at the same time, it is judged that the air sealing performance of the compressed air energy storage salt cavern cavity is qualified. The system comprises an injection and production pipe column, a test pipe column, a first pressure gauge, a second pressure gauge, a packer, a salt cavern cavity brine sealing performance monitoring unit, an injection and production pipe column gas sealing performance monitoring unit and a well body open hole section sealing performance monitoring unit. The method is suitable for air-tight seal monitoring of the compressed air energy storage salt cavern gas storage, the mode that a neutron source is used for measuring a gas-liquid interface is not used, the monitoring process is optimized, monitoring indexes are quantified, it is ensured that the salt cavern cavity sealing performance meets the sealing requirement of compressed air energy storage gas storage engineering, and the engineering utilization efficiency is improved.

The invention discloses an in-cylinder oil-gas mixing optimization method based on a liquid drop phase change state in a high-density environment, and belongs to the technical field of in-cylinder oil-gas mixing, and the specific process is as follows: step 1, selecting an alkane component of which the density monotonically changes in a gas-liquid interface in a binary mixture as a reference component; 2, calculating density distribution and influence parameters of reference components in the normal direction of the gas-liquid interface; step 3, according to the density distribution of the reference component in the normal direction of the gas-liquid interface, calculating to obtain the characteristic interface thickness and surface tension of the gas-liquid interface; 4, calculating an average molecular free path and a Knudsen number according to the interface temperature, the equilibrium pressure and the average molecular hard sphere diameter; 5, jointly predicting the evolution of a gas-liquid interface space structure through the interface thickness, the surface tension, the average molecular free path and the Knudsen number; and 6, when the predicted result in the step 5 is that supercritical phase change of the liquid drops occurs, the Reynolds number of airflow in the cylinder is increased, and oil-gas mixing in the cylinder is optimized.

The invention relates to the technical field of micro-nano bubbles, discloses a gas-water double-shearing micro-nano bubble generation method and equipment, and comprises the gas-water double-shearing micro-nano bubble generation equipment. Comprising a water spraying unit for generating high-speed atomized water flow, a gas-water premixing unit for premixing gas and water by adopting gas-water rotary cutting, a gas-water mixing unit for adopting rotary cutting, a gas-water double-shearing mixing unit for gas-water double shearing and a uniform stabilizing unit for stabilizing and discharging micro-nano bubbles. Based on the phenomena of self-excited oscillation, jet mixing and gas-liquid interface in fluid dynamics, by combining various mature fluid dynamics principles of cavitation effect, Venturi effect, shear breaking, impinging stream mixing and static mixing, the design of multiple gas chambers is added, especially the cavitation cavity, the annular gas chamber and the double-shear configuration, gas self-absorption is achieved, and the gas self-absorption effect is achieved. And the generation efficiency and uniformity of the bubbles are effectively improved.

The invention provides a multifunctional experimental system for simulating migration and transformation of micro-plastics in a landfill environment, comprising: a columnar migration device filled with a landfill soil medium, the bottom of which is provided with a liquid inlet interface and a gas-liquid interface, and the top of which is provided with a liquid outlet; the liquid inlet system is connected to the liquid inlet connector through a first peristaltic pump; the temperature control module comprises a flexible heating film arranged around the outer wall of the columnar migration device and a temperature controller, and the flexible heating film is connected with the temperature controller through a temperature control connector, an integrated heating element and a wire; the micro-nano bubble generating device comprises a CH4 gas cylinder, a pressure reducing valve and a micro-nano bubble generator which are connected in sequence, a micro-bubble aeration head is arranged on the micro-nano bubble generator, the micro-bubble aeration head is partially and directly immersed in a preset water body, a high-dispersity bubble water solution is generated under a gas-liquid interface, and the CH4 gas cylinder is used for generating CH4 gas. The gas is quantitatively conveyed to the bottom of the columnar migration device through a second peristaltic pump connected to the downstream, and the dissolution of the landfill gas in the pore water and the gas-liquid interface action are simulated.

The invention relates to the technical field of waste gas treatment equipment, and provides a waste gas treatment device for producing formic acid from carbon dioxide, which comprises a tower body, and the tower body is provided with a gas inlet and a gas outlet; the turbulent flow assembly is horizontally arranged in the tower body, the turbulent flow assembly comprises a mounting plate, the mounting plate is horizontally arranged in the tower body, and a plurality of water passing holes are uniformly distributed in the mounting plate; the spiral flow guide cone is inversely arranged below the mounting plate, and the conical surface of the spiral flow guide cone, the spiral flow guide cone and the mounting plate are connected through a plurality of elastic pieces. According to the technical scheme, the inverted arrangement of the spiral flow guide cone is matched with the spiral flow guide groove, so that gas-liquid two-phase flowing along a straight line originally is converted into gas-liquid two-phase flowing along a spiral path, the contact time of the gas-liquid two-phase in the tower body is prolonged, and meanwhile, the spiral flow guide cone can swing when being impacted by gas and liquid through elastic traction; the contact angle of the gas phase and the liquid phase is continuously changed, a stable liquid film is prevented from being formed on a conical surface, the disturbance of a gas-liquid interface is enhanced, and the mass transfer efficiency is improved.

The invention discloses a method and device for efficiently preparing plasma activated water, and relates to the technical field of preparation of plasma activated water, and the method comprises the following steps: introducing bubbles on the surface of liquid to increase the contact area of a gas-liquid interface; plasma discharge is generated at a gas-liquid interface by adopting a creeping discharge technology, and a plasma activated substance formed during discharge fully reacts with gas in the bubbles; the energy distribution in the activation process is optimized through the guidance of the external magnetic field on the plasma and the synergistic cooperation of the temperature, and the activation and purification of the liquid to be treated are realized by introducing bubbles on the surface of the liquid and combining with the creeping discharge technology. According to the property and the treatment requirement of the liquid, proper liquid to be treated is selected and injected into the liquid container. The distribution and density of the plasmas are controlled through the adjustable magnetic field, so that surface discharge is more uniform and stable, the energy loss is effectively reduced, and the activity of the plasmas is enhanced.

The invention is suitable for the technical field of ultrasonic gas-liquid purification, and provides ultrasonic gas-liquid purification equipment and a working method thereof.The ultrasonic gas-liquid purification equipment comprises a mounting assembly, a gas outlet is formed in the top of the mounting assembly, a gas inlet is formed in the side wall of the mounting assembly, and an absorption assembly is arranged in the mounting assembly; the absorption assembly is communicated with the air inlet, one side of the absorption assembly is provided with a liquid inlet assembly, the bottom of the absorption assembly is provided with a liquid collecting tank, one side of the liquid collecting tank is provided with a liquid outlet assembly, the liquid outlet assembly is communicated with the liquid collecting tank, and the absorption assembly comprises a mixing cavity; three groups of ultrasonic mechanisms are uniformly arranged in the mixing cavity, a flow guide pipe is arranged at the bottom of the mixing cavity, and the ultrasonic mechanisms are arranged, so that the turbulence degree of a gas-liquid interface can be enhanced, the mass transfer resistance can be reduced and the dissolution and diffusion of waste gas in liquid can be promoted under the vibration action of ultrasonic waves, and thus the gas-liquid mass transfer efficiency is improved.

The invention discloses a low-temperature liquid storage tank pressure prediction method based on a non-thermal equilibrium state model, and aims to improve the calculation speed of a pressure evolution law so as to reduce the time required for predicting the pressure of a storage tank. The method comprises the steps that firstly, a pressure sensor, a temperature sensor and a liquid level meter are used for collecting the temperature of a current gas phase and liquid phase area of the low-temperature liquid storage tank, the pressure in the storage tank, the vacuum degree of a heat insulation layer and the real-time liquid level; secondly, transmitting signal data obtained by monitoring of the sensor to a processor, and checking the density, phase change latent heat and thermodynamic energy of gas and liquid phases in the storage tank through REFPROP software; then establishing a three-dimensional model and a heat and mass transfer relationship of the storage tank, and performing heat transfer analysis on gas-phase and liquid-phase media in the storage tank; secondly, performing energy analysis on a gas phase region, a liquid phase region and a gas-liquid interface in the storage tank according to the established three-dimensional model and a heat transfer analysis result, and selecting a proper time step to perform iterative calculation so as to ensure the calculation precision of each step; storing the calculation result of the previous step, and searching and taking thermodynamic parameters of the next time step through REFPROP software according to the parameters obtained through calculation; finally, the safe storage time of the storage tank under the current liquid filling volume and the heat insulation performance is calculated, and safe work of the storage tank is guaranteed.

The invention discloses a space variable-gravity on-orbit fluid experiment system and method in the technical field of space fluid management, and the system comprises a variable-gravity centrifugal platform which is used for manufacturing a variable microgravity environment required by an experiment; the experiment box is mounted on the variable-gravity centrifugal platform, and an experiment storage box and a liquid storage box are arranged in the experiment box; the electric control box is arranged on the variable-gravity centrifugal platform and is connected with an electronic device in the experiment box; a box body of the experiment storage box is made of a transparent material, a gas-liquid interface in the experiment storage box can be observed, and the liquid storage box is used for storing a liquid working medium; the experiment storage box is provided with observation scales, and the observation scales are arranged in the centrifugal acceleration direction of the variable-gravity centrifugal platform so that the filling ratio of liquid in the experiment storage box can be observed through centrifugal force.

The application provides a liquid drop evaporation test bench with known flow field parameters, which comprises an observation column, an air inlet filter pipe, a transverse flow straightener, a ring flow straightener, a vortex chamber, an air outlet valve, an air outlet filter screen, a static drop pipe, an injection capillary tube and an automatic injector; one end of the observation column is fixedly connected with the vortex chamber through the air inlet filter pipe, the transverse flow straightener and the ring flow straightener; the air outlet valve is installed in the air outlet hole of the vortex chamber; the other end of the observation column is fixedly connected with the air outlet filter screen; the static drop pipe is installed in the static hole of the air outlet filter screen; one end of the injection capillary tube is connected with the injection hole of the automatic injector, and the other end is connected with the drop pipe hole of the static drop pipe; a plurality of sensor sealing columns are installed in the sealing through grooves on the observation column; and sensors are installed in the sensor holes of the sensor sealing columns. The application solves the problems of errors and unknowns in research results caused by uncontrollable and unmeasurable weak air flow disturbance determined by the disappearance of liquid surface tension and the increase of gas-liquid interface thickness under the transcritical / supercritical condition.

A durable biomimetic concave lubricating oil wetting surface design method includes the following steps: designing a concave structural surface to ensure stable distribution of lubricating oil within the structure, reducing loss and improving surface durability; establishing a lubricating oil wetting mechanism by decomposing and calculating the forces acting on the gas-liquid interface to allow lubricating oil to wet the interior of the structure; establishing a lubricating oil loss mechanism by comparing the static contact angle and the tilt angle of the top edge of the structure relative to the vertical direction, determining the degree of concavity and oil-locking ability of the concave structural surface, determining the shape coefficient of the concave structural surface, and obtaining a concave structural surface with excellent performance in both lubricating oil wetting and lubricating oil loss.

Provided is a method for estimating the concentration of a gas in a molten resin in an injection device for foam molding, said method being capable of estimating the concentration of the gas dissolved in the molten resin. During the rotation of the screw (18), the rate of change (dC / dt) of the gas concentration, which changes by dissolving into the molten resin (29) from the gas-liquid interface between the gas and the molten resin (29) in the non-filled section (27), is provided by the following formula. Wherein the rate of change of the gas concentration in the molten resin [g / (m3s)] k: constant [ / s] C *: solubility of the gas [g / m3] C: gas concentration in the molten resin [g / m3] is estimated from the equation (c1) and the passage time T, which is the time required for the molten resin (29) to pass through the non-filled section (27).

The invention relates to the technical field of micro-nano bubbles, and discloses a jet flow series connection micro-nano bubble generation method and jet flow series connection micro-nano bubble generation equipment. Comprising a water injection unit for generating high-speed atomized water flow, a gas-water premixing unit for premixing gas and water by adopting gas-water rotary cutting, a gas-water mixing unit for adopting rotary cutting, a gas-water jet series mixing unit and a uniform stabilizing unit for stabilizing and discharging micro-nano bubbles. Based on the phenomena of self-oscillation, jet mixing and gas-liquid interface in fluid dynamics, by combining various mature fluid dynamics principles such as cavitation effect, Venturi effect, shearing and crushing, impinging stream mixing and static mixing, the design of multiple gas chambers is added, particularly, the cavitation cavity, the annular gas chamber and jet series mixing configuration is adopted, gas self-absorption is achieved, and the gas self-absorption effect is achieved. And the generation efficiency and uniformity of the bubbles are effectively improved.

The present invention provides a liquid ejection device and a control method for the liquid ejection device. The problem is that when the head unit is detached from the mounting portion, the gas-liquid interface of the nozzle may collapse, resulting in ink leakage. The liquid ejection device (500) includes: a head unit (200) having a plurality of nozzles (N) for ejecting liquid, and including a filter (16) provided with holes (16H) through which ink can pass, a nozzle row (12a) formed by the plurality of nozzles (N), and a nozzle row (12e) formed by the plurality of nozzles (N); a mounting portion (40) detachably mounting the head unit (200), wherein the nozzles (N) forming the nozzle row (12e) communicate with the nozzles (N) forming the nozzle row (12a) via the filter (16). Before the head unit (200) is detached from the mounting portion (40), a pre-action of forming a gas-liquid interface in the holes (16H) provided in the filter (16) is performed.

The invention relates to the technical field of water treatment equipment multi-dimensional management, and discloses a water treatment equipment multi-dimensional management system based on an intelligent water affair cloud platform, and the system comprises the steps: calculating a dynamic alpha factor in real time through on-site off-gas detection data and a clear water reference mass transfer coefficient, and carrying out the real-time calculation of a dynamic alpha factor based on the monotonous relation between a bubble stagnation cap and mass transfer resistance; and performing inversion to obtain continuous parameters for quantifying the gas-liquid interface state. And further calculating the real-time sensitivity of the parameter to the air volume of the air blower, constructing an air volume and mass transfer nonlinear model, and solving the target air volume with the minimum energy consumption under the condition of meeting the technological oxygen demand constraint condition. And finally, the target air volume serves as a control instruction to be issued, meanwhile, interface recovery time is output according to the time change rate of the gas-liquid interface parameters, and dynamic energy saving and interface state collaborative management of the water treatment aeration system is achieved.

The present application relates to the technical field of oil processing, and discloses a physical refining process for non-chemical refined oil, which comprises the following steps: preheating the oil and forming an extremely thin liquid film on the surface of a centrifugal disc; injecting superheated steam into the bottom layer of a deacidification zone through a microporous air distribution plate; generating a non-continuous micro-bubble array by high-frequency pulse modulation, and making the micro-bubbles migrate and expand upward under vacuum negative pressure; generating a cavitation collapse effect by the micro-bubbles penetrating the gas-liquid interface, generating a shock wave to break the mass transfer boundary layer, and stripping the free fatty acid components in the liquid film to the gas phase. The present application replaces macroscopic fluid sweeping with microcosmic transient stripping, realizes efficient deacidification when the heat exposure temperature of the oil is lower than 230 DEG C, effectively inhibits the generation of trans-fatty acids and glycidyl esters, maintains the mechanical balance of the liquid film surface while ensuring the driving force of deacidification, reduces the loss of neutral oil, and improves the refining yield.

The application discloses a method and device for controlling liquid reciprocating flow based on magnetic force and application. The method provided by the application utilizes the interfacial capillary force generated by the hydrophilic magnet on the gas / liquid / solid three-phase interface formed before the liquid is separated to realize the flow control of the liquid. The method has the advantages of: 1) non-contact flow control, which can avoid the pollution caused by contact control (such as mechanical probe control); 2) the liquid is moved smoothly and quickly, no bubbles and new gas-liquid interfaces are generated, the severe friction and vibration on the gas-liquid interface are avoided, and the aerosol generation probability is reduced; 3) compared with the existing magnetic control mode for moving or disturbing the liquid by pushing force, the aerosol pollution risk is greatly reduced. In addition, the beneficial effects of only 1-2 minutes for one round of antigen-antibody combination and 5-15 minutes for one detection are realized, and the detection speed is much higher than that of the traditional immunodetection method based on a reaction cup or a microhole plate.

The return pump which feeds the ink from the collection tank to the supply tank is provided, and the differential pressure generation assistance to feed the ink from the collection tank to the return pipe by the return liquid feeder is performed concurrently with the execution of the printing differential pressure generation. In the collection tank, the volume of the air layer above the gas-liquid interface is thereby expanded, to thereby decompress the air layer, and in the supply tank, the volume of the air layer above the gas-liquid interface is thereby compressed, to thereby pressurize the air layer. Thus, the generation of the differential pressure between the collection tank and the supply tank is assisted.

Mixing a liquid sample and at least one reagent in microchannel of a microfluidic device includes preparing a segment of the liquid sample in contact with the reagent(s) within the microchannel. The liquid segment has a volume of 2 μL or less and defines a proximal gas-liquid interface and a distal liquid-gas interface. The gas of the proximal gas-liquid interface is in gaseous communication with a distal liquid-gas interface of another amount of liquid disposed proximally to the liquid segment within the microchannel of the microfluidic channel. The gas of the distal liquid-gas interface is disposed distally to the liquid segment within the microfluidic channel. With the liquid of the liquid segment in contact with the reagent(s) within the microchannel, the gas of the distal liquid-gas interface and / or the gas of the proximal gas-liquid interface is / are oscillated at an acoustic frequency to induce mixing of the liquid and the reagent(s).

This application discloses a dual-fluid, dual-channel nozzle specifically designed for large roll and support roll spraying quenching machines. It mainly comprises a nozzle body, spiral guide vanes, a mixing chamber, and a diffusion nozzle. This invention features gas-liquid swirling mixing, filtration, backwashing, and self-cleaning effects. Clean water passes through the filter element and is spirally turbulent by an array of spiral turbulence vanes A, creating a central spiral flow field. The airflow, after being guided through the annular cavity between the nozzle body and the guide chamber, enters the space between the fixed sleeve and the outer wall of the cavity, where it is spirally turbulent by the spiral array of spiral turbulence vanes B, forming a uniformly distributed annular swirling field. The gas and liquid phases ultimately mix and contact inside the diffusion nozzle of the mixing chamber. The gas swirling flow, carrying tangential velocity, surrounds the water flow on its outer edge, while the water swirling flow, carrying circumferential velocity, diffuses from the center outwards, creating a collisional envelopment with the annular airflow. The velocity difference between the two swirling flows generates continuous shear force at the gas-liquid interface, constantly breaking up the water flow.

The utility model discloses a continuous auxiliary feeding device for improving whiteness and fisheye of polyvinyl chloride. A discharge port of a relieving gas-liquid interface agent storage tank is respectively connected with a feed port of the relieving gas-liquid interface agent storage tank and a feed port pipeline of a polymerization kettle; a discharge port of the stabilizer storage tank is respectively connected with a feed port of the stabilizer storage tank and a feed port pipeline of the polymerization kettle; the relieving gas-liquid interface agent regulating valve is arranged on a pipeline between a discharge port of the relieving gas-liquid interface agent storage tank and a feed port of the relieving gas-liquid interface agent storage tank, and the pH regulator regulating valve is arranged on a pipeline between a discharge port of the pH regulator storage tank and a feed port of the pH regulator storage tank; the pH regulator reflux valve is arranged on a pipeline between the discharge port of the pH regulator storage tank and the feed port of the polymerization kettle; and the stabilizer return valve is arranged on a pipeline between the discharge port of the stabilizer storage tank and the feed port of the polymerization kettle. According to the utility model, a gas-liquid interface relieving agent, a pH regulator and a stabilizer can be continuously added into the polymerization kettle, so that the polymerization reaction efficiency is improved.

The current invention relates to the field of in vitro culturing of T cells, more in particular of in vitro production of unconventional T cells expressing specific markers. Indeed, the present invention discloses a method to produce said unconventional T cells comprising the generation of hybrid spheroids out of combining stem cells and adherent cells and further culturing said spheroids at the air liquid interface. The latter T cells can be used to produce CAR-T cells.