150 results about "Air liquid interface" patented technology

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 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 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 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.

The utility model discloses a gas-liquid migration experimental device of a gas storage, relates to the technical field of gas storage simulation devices, and aims to provide an experimental device capable of simulating the influence of the gas production efficiency of the gas storage on gas well water invasion. The device comprises a sand-filled gas storage, a gas injection and recovery device, a liquid injection device and a detection device. The detection device can detect the change condition of a gas-liquid interface in the sand-filled gas storage in various operation processes of liquid injection, gas injection and gas production. Therefore, by simulating the gas-liquid migration process under different gas production efficiencies and detecting the gas-liquid interface change, equipment is provided for researching the influence of the gas production efficiency on gas well water invasion.

Provided are: a method for storing a dispersion containing body in which a dispersion containing particles of a tetrafluoroethylene polymer and water is contained in a containing container, in which deterioration of the tetrafluoroethylene polymer and coloring of the dispersion are suppressed; and the dispersion containing body. Provided is a method for storing a dispersion liquid container, a dispersion liquid containing body is formed by containing a dispersion liquid containing tetrafluoroethylene polymer particles, a nonionic surfactant, and water in a container such that the liquid density of the dispersion liquid is in the range of 95.0% or more and less than 99.9% with respect to the theoretical liquid density of the dispersion liquid calculated by formula (1). The product of the volume ratio of the gas phase in the storage container and the gas-liquid interface area of the storage container is maintained in the range of 10,000-60,000, and the temperature is maintained in the range of more than 0 DEG C and 20 DEG C or less. (1) The theoretical liquid density of the dispersion liquid = (density of the dispersoid * volume ratio of the dispersoid) / (density of the dispersoid * volume ratio of the dispersoid + density of the dispersion medium * volume ratio of the dispersion medium).

The present invention relates to a soft robot for realizing three-dimensional motion of a gas-liquid interface and a preparation method thereof. The robot preparation method includes: mixing liquid crystal units and CNTs with high photothermal conversion efficiency, stirring and reacting above the liquid crystal transition temperature to obtain a liquid crystal prepolymer ink, and then obtaining a customizable-oriented soft robot through 3D printing and ultraviolet light curing. The interface soft robot prepared by this method has a series of advantageous features such as programmable orientation, precise spatio-temporal control, and continuous energy supply. And for the first time, three-dimensional motion of a two-phase (gas-liquid) interface is realized by changing the angle of the interface three-phase line (liquid-gas-solid). The method proposed by the present invention will provide a method for the development of a new generation of soft robots at the gas-liquid interface.

The application provides a kind of transient shock self-oscillation type gas storage gas-liquid interface monitoring system and method, which comprises: transmitting an impulse voltage signal to the central tube, the impulse voltage signal passes through the loop formed by the stratum, salt water and the central tube;The loop responds to the self-oscillating AC signal shock with a frequency of f under the impulse voltage signal;Detect the frequency f of the self-oscillating AC current signal on the central tube;According to the self-oscillating AC current signal frequency f and the known gas storage parameters, the height H of the gas-liquid interface distance from the wellhead is calculated.The application uses electrical signal as ranging signal to achieve the purpose of ranging.Compared with low-frequency electrical signal ranging, the position requirement of the measuring device is lower, compared with laser ranging, the obstruction can be effectively avoided, and high-precision real-time measurement can be realized.The application improves the detection accuracy, and the detection process and equipment are simpler.

A scalable and modular bioreactor defines a compact gas-liquid interface area populated with gas consuming microbes in a stacked arrangement for facilitating growth of the microbes in the presence of the greenhouse gases the microbes consume. A biofilm-based interface between liquid and gaseous regions of the reactor positions the microbes at the gas-liquid interface for metabolic exchanges of the gas for conversion into liquid and gaseous output. Microbes are selected for an affinity for a particular gas, such as methane (CH4), and metabolize carbon based outputs such as carbon biopolymers and gases such as carbon dioxide (CO2) and hydrogen (H2) for harvesting or recircling back for further metabolic conversions.

The invention relates to the technical field of micro-nano bubbles, and discloses a disc-type adjustable jet flow micro-nano bubble generation method and equipment, and the disc-type adjustable jet flow micro-nano bubble generation equipment comprises a nozzle for generating high-speed atomized water flow, a static flow guide unit and a Venturi jet flow shear mixing unit. Based on the phenomena of jet mixing and gas-liquid interface in fluid dynamics, in combination with various fluid dynamics principles of cavitation effect, Venturi effect, shearing and crushing, impinging stream mixing and static mixing, gas self-absorption is realized through the annular flow channel and adjustment of the gap of the cavity, bubbles can be more efficiently generated, the uniformity of the bubbles is improved, and the bubble generation efficiency is improved. And the formation and the stability of the microbubbles are optimized. Meanwhile, the disc type structure is compact, is easier to expand compared with a pipe type structure, is suitable for large-flow treatment, is convenient to process, and is suitable for batch production.

The invention discloses a gas-liquid two-phase jet flow condensation flow field reconstruction method and system based on modal decomposition. The method comprises the following steps that a plurality of dominant flow structures with large advantages are selected for flow field reconstruction; respectively constructing an original flow field gray matrix and a reconstructed flow field gray matrix based on the original flow field snapshot-based reconstructed flow field snapshot; gray gradients of vectors of the original flow field gray matrix and the reconstructed flow field gray matrix are calculated, abrupt change points of the gray gradients are extracted, and the position of the gas-liquid interface is recognized according to the abrupt change points of the gray gradients; the gas-liquid interface error between the reconstructed flow field and the original flow field is calculated, and if the gas-liquid interface error is smaller than 5%, reconstruction is completed; if the gas-liquid interface error is larger than 5%, the steps are repeated until the error requirement is met, and then a gas-liquid two-phase jet flow condensation flow field is obtained; unified representation of the vortex structure is achieved, and the modal aliasing limitation of a single decomposition method is broken through through collaborative application of intrinsic orthogonal decomposition and dynamic modal decomposition.

The utility model provides a centrifugal micro -fluidic detection chip belongs to chip field, it is by chip body, sample adds sample groove, sampling mechanism, dilution mechanism, reagent detection mechanism and waste liquid storage mechanism constitute, the sample mixed solution in first reagent tank in this scheme is driven under centrifugal force and further enters first flow passage in, the air in transition area and second reagent tank is sealed at this moment and will receive compression and produce reverse pressure, when reverse pressure and fluid surface tension and centrifugal force reach balance, the stable gas -liquid interface will be formed at the communication of first flow passage and transition area, the setting of chip body not only eliminates the interference problem between reagent hole position in prior art scheme, and can realize two reagents'separate placement, and the sample to be detected first with reagent 1 carries out the reaction, then carries out the reaction with reagent 2, effectively improved the accuracy and stability of detection project.

This invention discloses an online monitoring method and device for the content of gaseous peroxides in ambient air. Based on a wet chemical method of gas diffusion absorption trapping and fluorescence spectroscopy detection technology, this invention uses a multi-turn wound non-metallic tube trap for sampling. The absorbent forms a liquid film on the tube wall, and the gaseous components to be measured diffuse and transfer mass at the gas-liquid interface. After sufficient contact and absorption with the absorbent, gas-liquid separation is achieved at the other end of the trap. Using p-hydroxyphenylacetic acid as a peroxide derivative, a fluorescent dimer is generated under the catalysis of heme chloride. This dimer fluoresces under characteristic wavelength light irradiation. The fluorescence intensity is measured using a flow cuvette and a photomultiplier tube, and the peroxide content of the gaseous components is calculated. The corresponding online monitoring device of this invention uses a multi-channel peristaltic pump for precise control of trace solutions, reducing daily maintenance. It can be applied to the rapid, online, and continuous measurement of gaseous peroxides in various environmental environments.

The present invention relates to a ducted propeller for delaying cavitation based on a super-hydrophobic slip effect and a manufacturing method thereof, comprising: a duct; a stator fixedly disposed in the duct; and a rotor, wherein the rotor comprises a rotating shaft rotatably connected to the stator and a plurality of blades fixedly connected to the rotating shaft, the tip of each blade being provided with a first super-hydrophobic layer; wherein a tip gap is formed between the first super-hydrophobic layer and the inner wall of the duct, and the surface of the first super-hydrophobic layer has a gas-liquid interface slip effect, thereby delaying tip gap vortex cavitation, reducing noise, and weakening cavitation risk without changing the duct wall and rotor blade tip structure of the ducted propeller.