1021 results about "Static mixer" patented technology

The invention discloses a static mixer for oil-water emulsification, and relates to the technical field of oil-water emulsification, the static mixer comprises an oil-water mixing pipe, a dosing pipe is fixed on one side of the top end of the oil-water mixing pipe close to a feed port, support rings are symmetrically fixed in the oil-water mixing pipe, and a DNA-imitated double-helix channel is fixed between the two groups of support rings; the DNA-imitating double-helix channel is fixed between the two groups of supporting rings on the inner side of the oil-water mixing pipe, the shark-imitating placoid scale ribs which are distributed in an array manner are fixed on the inner wall of the DNA-imitating double-helix channel, a unique bionics principle is utilized, an efficient mixing phenomenon in nature is simulated, efficient and uniform mixing of fluid in a steady-state environment is realized, and the oil-water mixing effect is improved. According to the device, fluid can be guided to generate micro vortexes, full contact and collision of oil drops and water drops can be promoted, the emulsification efficiency and stability are remarkably improved, an external power source is not needed, efficient mixing can be achieved by means of energy of the fluid, and the device is compact in overall structure, easy and convenient to install and suitable for various-scale emulsification processes.

The invention provides a static mixer with a bionic starfish type inlet structure and a mixing method thereof. The static mixer comprises a shell, a cavity is formed in the shell, one end of the shell is provided with an air inlet communicating with one end of the cavity, and the other end of the shell is provided with an air outlet communicating with the other end of the cavity; an air inlet pipe set is arranged at the end, close to the air inlet, of the shell and comprises a center air inlet pipe extending in the axial direction and five peripheral air inlet pipes evenly distributed in the circumferential direction of the center air inlet pipe. The central air inlet pipe and the peripheral air inlet pipe form a bionic starfish type inlet structure for simulating a central disc and a radiation wrist structure of starfish; a plurality of spiral pieces arranged in the axial direction of the cavity are arranged in the cavity, and the arrangement angles of the adjacent spiral pieces are different. By means of the bionic starfish type inlet structure design, hydrogen is evenly dispersed to the whole mixing area, the mixing uniformity of natural gas and hydrogen is effectively improved, and meanwhile the risk of hydrogen embrittlement is delayed.

The utility model discloses a multi-element gas automatic mixing device which comprises a plurality of gas branches, all the gas branches are jointly connected with a gas main path, the gas main path is connected with a mixing tank, the gas main path is provided with a static mixer, the mixing tank is provided with a dynamic mixer, and the static mixer is connected with the dynamic mixer. A gas outlet of the mixing tank is sequentially provided with a first-stage buffer tank, a second-stage buffer tank, a third-stage buffer tank and a first gas storage chamber in the gas conveying direction, and efficient mixing of gas is achieved through a static mixer and a dynamic mixer. The static mixer utilizes a spiral structure to generate rotation and turbulent flow to promote uniform mixing of gas; under the condition that the gas flow speed is lower or the gas types are more, the dynamic mixer is provided with an electric stirring blade, the mixing uniformity is further improved through mechanical stirring, the gas enters the buffer tank after being mixed through the arrangement of the multi-stage buffer tank, the pressure fluctuation is reduced, and the flow speed is homogenized. And the repeated diffusion and distribution process in the buffer tank improves the mixing uniformity of the gas.

A static mixer includes a mixer housing, a mixing element including mixing bodies arranged one after another along a longitudinal axis so as to be capable of repeated separation and recombination of components, each of the mixing bodies including a first and second inlets, first and second lateral outlets and an intermediate outlet disposed between the first and the second lateral outlet, an input wall separating the first and second inlets, a deflection element arranged downstream of and adjacent to the input wall, first and second output walls arranged downstream of and adjacent to the deflection element, the first output wall separating the first lateral outlet and the intermediate outlet and the second output wall separating the intermediate outlet and the second lateral outlet.

The invention discloses a polyurethane foam preparation process and device based on liquid carbon dioxide foaming, and belongs to the field of polyurethane production. The preparation process comprises the following steps: S1, conveying polyether polyol, polymer polyol and a liquid carbon dioxide foaming agent into a front static mixer, uniformly mixing under a certain pressure state, and conveying into a main mixer; s2, inputting isocyanate into a main mixer in a high-pressure state, and uniformly mixing and stirring the isocyanate and other uniformly mixed raw materials in the main mixer; s3, conveying the water, the silicone oil surfactant, the foaming catalyst and the gel catalyst into a main mixer, stirring and mixing with the raw materials, and conveying into an emulsifier; s4, the mixed raw materials and auxiliary materials are subjected to step-by-step pressure release through a multi-layer screen structure of the emulsifier, so that the liquid carbon dioxide is gradually converted into a gas state from a liquid state in the emulsification and pressure release process and is gradually gasified and foamed, and finally the soft polyurethane foam is prepared through pouring.

The invention relates to the technical field of micro-channel reaction, and discloses a micro-channel polymerization reaction process which comprises the following steps: 1, mixing a monomer, an initiator, a solvent and other additives according to a required ratio, ensuring uniform distribution, uniformly mixing by using a static mixer or an oscillator, and preparing to enter a reactor; 2, feeding the mixed raw materials into a micro-channel reactor through an accurately controlled pump; by arranging the medium inlet, uniformly mixed raw materials are fed into the vertical channels, and a medium sequentially passes through the vertical channels and the connecting channels to complete polymerization reaction. The position of the sliding pipe is adjusted through the adjusting component, the volume of the vertical channel can be dynamically increased, the requirements of fluids with different viscosities are met, meanwhile, the angle of the connecting channel is changed, the fluid path is shortened, the flowability is improved, and the retention time is optimized.

The utility model discloses a polyester reverse esterification kettle on-line adding device which comprises a first esterification kettle and a second esterification kettle, a batching pipeline is arranged between the first esterification kettle and the second esterification kettle, and a three-monomer on-line injection system is arranged on one side of the batching pipeline. A second static mixer, a dynamic mixer and a pneumatic valve are sequentially arranged on the batching pipeline between the three-monomer on-line injection system and the second esterification kettle, and materials prepared by the three-monomer preparation system are injected into a connecting pipeline through the three-monomer on-line injection system; and then the mixture enters the second static mixer and the dynamic mixer to be mixed and then is injected into the second esterification kettle through the pneumatic valve. The transformation from production of extinction products to production of cationic products can be quickly realized in the five-kettle process, so that the productivity and the quality of the products are ensured, and benefits are created for enterprises to be maximized.

The invention provides a containment suppression, filtration and discharge system for a floating nuclear power platform. Comprising a containment, a first discharge valve, a first discharge pipeline, a first spray pipe, a first-stage pressure suppression water tank, a second-stage pressure suppression water tank, an expansion cabin, a second discharge valve, a filter cabin, a second spray pipe, an air cooler, a radioactivity monitor, a passive residual heat discharge water tank, a first stop valve and a second stop valve. By arranging a plurality of radioactive removal means which are connected in series, including two-stage bubbling washing, static mixer bubble cutting, efficient metal fiber filtering, silver zeolite filtering and the like, efficient removal of airborne radioactive substances (aerosol, inorganic iodine and organic iodine) can be realized; and the radioactive influence of overpressure discharge of the containment on the environment under the condition of serious accidents is reduced. The air cooler is arranged on the filtering and discharging pipeline to condense discharged steam, condensate returns to the filtering cabin by means of the gravity difference, and long-term passive effective operation of the water scrubber can be achieved.

The invention relates to the technical field of sewage treatment, in particular to a CCRO high-efficiency water treatment system and a working method thereof. Comprising a sewage tank, a water supply pump, a scale inhibitor injection module, a sodium hydrogen sulfite injection module, a bactericide injection module, a security filter, a static mixer, a high-pressure pump, a reverse osmosis membrane assembly, a reaction tank, a circulating pump, a cleaning pump, a water production tank and a concentration device which are connected through pipelines, the sewage tank, the water supply pump, the security filter, the static mixer, the high-pressure pump, the reverse osmosis membrane assembly, the reaction tank, the circulating pump, the cleaning pump and the water production tank are all provided with an outlet and an inlet, and the reverse osmosis membrane assembly is also provided with a drain outlet; the sewage pool, the water supply pump, the static mixer, the security filter, the high-pressure pump, the reverse osmosis membrane assembly and the water producing pool are sequentially connected through the outlet and the inlet through pipelines; the problem that an existing CCRO water treatment system is insufficient in automation degree can be effectively solved, the sewage treatment efficiency and quality are improved, the operation and maintenance cost is reduced, and wide application prospects are achieved.

The present application provides a hazardous gas detection system to determine hazardous gas concentrations and / or temperatures within a flow of exhaust air in an exhaust duct of a gas turbine compartment. The hazardous gas detection system may include one or more sensors positioned within or in communication with the exhaust duct and a static mixer positioned upstream of the one or more sensors to promote mixing of the flow of exhaust air.

The utility model relates to a system for reducing the acid value of hydrolysate in the separation and washing process of dimethyl dichlorosilane hydrolysate. Comprising three stages of coalescers, dimethyl dichlorosilane acidic hydrolysate enters the system from the first stage of coalescer, process water enters the system from the third stage of coalescer, the acidic hydrolysate and diluted hydrochloric acid or process water are mixed in each stage of coalescer, oil-water two-phase separation is completed through multiple times of washing and coalescence, and meanwhile the acid value of the hydrolysate is reduced; each stage of coalescer comprises two static mixers connected in series, a group of prefilters and a large coalescer, the coalescer is Z-shaped, and four stages of filter elements are arranged in each stage of coalescer. Through repeated tests, a modified polyvinylidene fluoride filter element of Pall Company is finally selected, and after continuous three-stage coalescer treatment, the acid value of dimethyldichlorosilane hydrolysate can be reduced to 10 PPM or below.

The invention discloses a water-doped methanol fuel static mixer and a blending flow control module thereof, the static mixer realizes efficient mixing of methanol and water through a flow guide structure specially designed in the static mixer, and temperature, pressure and flow sensors are combined to monitor and adjust the concentration and supply quantity of fuel in real time. The mixer comprises a feed port, a discharge port, an internal multi-stage mixing structure, a flow control device and a monitoring instrument, through optimized geometric design and the multi-stage mixing structure, the stability of fuel concentration and the reliability of supply are ensured, the module can effectively solve the problems that methanol and water are not mixed uniformly, the concentration fluctuates, and the supply amount is not stable, and the mixing efficiency is improved. And stable supply of fuel is ensured, and the efficiency and safety of the fuel engine are improved. The system is suitable for the actual demand of ship fuel supply and has high automation and reliability.

The utility model provides a grate-fired furnace SCR denitration catalytic device which comprises a vertical flue, an inclined flue, a transverse flue, an ammonia spraying grid, a static mixer, a guide plate and a catalyst layer, the vertical flue, the inclined flue and the transverse flue are sequentially communicated end to end, a flue gas inlet is formed in the side wall of the vertical flue, and an outlet of the transverse flue is a flue gas outlet; the ammonia spraying grid is fixed on the inner wall of the vertical flue and is connected with an ammonia source, and an air spraying opening of the ammonia spraying grid is arranged upwards; an input port of the static mixer corresponds to the upper part of the air nozzle and is fixed on the inner wall of the vertical flue; the plurality of flow guide plates are arc-shaped plates, are arranged in parallel and are fixed at the joint of the vertical flue and the inclined flue; the SCR denitration catalytic device of the grate-fired furnace belongs to the technical field of SCR denitration, enables flue gas and ammonia gas to be fully mixed, enables a flow field to be uniform, and improves the effect of reducing nitric oxide gas.

The utility model discloses an SK type static mixer device, and belongs to the technical field of mixer devices. The device comprises an inner cylinder body, a cross-shaped separation frame is arranged in the inner cylinder body, a cavity separation cylinder is arranged in a separation cavity between the cross-shaped separation frame and the inner cylinder body, a right-handed rotation frame is arranged in the cavity separation cylinder, and a left-handed rotation frame is connected to the bottom of the right-handed rotation frame in an electric welding mode; according to the utility model, multi-strand shunting initial disturbance mixing of fluid can be realized, preliminary mixing and fine treatment of the fluid can be promoted, reverse pressurizing pushing can be carried out on the fluid, and the fluid is subjected to backwashing conveying mixing by combining the self weight of the fluid, limited extrusion of a cavity space and continuous injection pressure of the fluid; the flow state of the fluid is effectively changed, the flow distance is increased in a small space, the mass and heat transfer effect of the fluid is improved, the mixing treatment efficiency of the fluid is improved, liquid drops can be dispersed to the particle size larger than or equal to 5 micrometers in the emulsification process, operation stability is good, and the problem that multiple kinds of liquid are difficult to evenly mix is solved.

The invention provides a dynamic cross-linked polyolefin elastomer and a preparation method thereof. According to the method, a double-kettle serial solution polymerization process is adopted, a reaction material is generated through a polymerization reaction in a first reaction kettle, the reaction material is transferred into a second reaction kettle added with a dynamic cross-linking agent and an initiator for continuous reaction and then enters a devolatilization system, a quenching agent is added through a static mixer, then granulation is performed through a screw extruder, and the dynamic cross-linked polyolefin elastomer is obtained. According to the preparation method, dynamic chemical crosslinking is carried out in the production process of the polyolefin elastomer, and the mechanical property and thermal stability of the obtained polyolefin elastomer product can be improved on the premise of ensuring the processability.

The invention discloses a supercritical fluid assisted polymer devolatilization distributor. The supercritical fluid assisted polymer devolatilization distributor comprises a gradually-shrinking channel, a throttling channel and a gradually-expanding channel which are connected in sequence. A static mixer is arranged in the throttling channel, the upstream pressure is maintained to be above a supercritical state by increasing fluid resistance, meanwhile, the mixing effect of supercritical fluid and polymer melt is enhanced, stable and uniform foam flow is formed, and pressure fluctuation is avoided; an automatic pressure relief valve assembly is arranged on the upper portion of the divergent channel and composed of a valve opening, a valve cover plate, a spring, an adjusting knob and the like, when the system pressure exceeds a set value, exhaust is automatically started, and controllable pressure relief is achieved. A plurality of rows of flow distribution holes are formed in the lower part of the distributor to ensure that the melt uniformly flows out to form stable melt strips; the problems that traditional equipment is difficult to pressurize and not timely in pressure relief are solved, the supercritical state maintenance, gas-liquid separation and melt forming processes are optimized, the volatile component removal efficiency is improved, the phenomenon that melt strips are broken or accumulated is effectively prevented, and continuous and stable operation of the devolatilization process is guaranteed.

To provide a stationary type mixer for a fluid, that more efficiently mixes and activates a fluid, such as flammable gas and air, used in a pressure-welding torch or the like.SOLUTION: A stationary type mixer A3 for a fluid comprises: a pipe body 1 provided with a straight internal space 4 having a supply pipe 90a and a discharge pipe 90b of a fluid at both ends in a length direction; and a guide body 3 which is accommodated in the internal space 4 of the pipe body 1b, is provided with spiral blades 30a, 30b from the supply pipe 90a toward the discharge pipe 90b on an outer peripheral surface 39, and further, which is provided with clearances 400 of a predetermined size in between a tip of the spiral blades 30a, 30b and an internal peripheral surface 19 forming the internal space 4 of the pipe body 1b.SELECTED DRAWING: Figure 5

The embodiment of the specification provides an astaxanthin extraction device, the device comprises a mixing tank, a cavitator, a static mixer, a three-phase centrifuge and a precision filter, the mixing tank is configured to mix haematococcus pluvialis, water and phospholipase to form uniform algae slurry; the cavitator is configured to receive the algae slurry and perform wall breaking on the algae slurry by utilizing hydrodynamic cavitation to obtain wall-broken algae slurry; the static mixer is configured to mix the wall-broken algae slurry and an extraction agent to form mixed algae slurry; the three-phase centrifugal machine is configured to receive the mixed algae slurry and perform three-phase separation on the mixed algae slurry to obtain an astaxanthin oil phase, a water phase and algae residues; the precision filter is configured to filter the astaxanthin oil phase so as to remove residual algae residues, and the astaxanthin oleoresin is obtained.

According to the meta-aramid continuous polymerization process and the innovative structure of the first reactor and the second reactor, the technological process of a newly-designed meta-aramid continuous polymerization device is introduced, a fixed tube plate type heat exchanger and the first reactor are combined into an efficient axial flow type polymerization reactor, and a static mixer is directly inserted into the lower part of a stirrer; reactants are quickly scattered and uniformly distributed when entering the reactor, the temperature of the reactor is effectively controlled, reaction heat is removed, and the flowing state in the reaction kettle is changed. A guide cylinder is additionally arranged at the lower part of a tube bundle, and an asymmetric and helical-surface paddle push-type stirrer is selected to push materials to circularly flow upwards in an inner tube nest and downwards in an outer tube nest, so that vertical circulation is formed. The second reaction kettle adopts a stirrer without a through shaft in the center, inner and outer double helical ribbons and a scraper, so that a flowing dead zone is eliminated, and the mixing of high-viscosity materials is solved. The added three-way ball valve and return line are used for cooling during starting and cleaning of the two reactors during stopping.

The invention discloses a powder multidirectional pneumatic conveying channel structure based on mixed material processing, and relates to the technical field of pneumatic conveying, the powder multidirectional pneumatic conveying channel structure specifically comprises a buffer mixing cylinder, the bottom of the buffer mixing cylinder is provided with a sealing ball valve, the bottom of the sealing ball valve is fixedly communicated with a first flow channel through a flange, and one end of the first flow channel is fixedly connected with a material distributing cylinder; a runner II is fixedly communicated with one side of the material distributing barrel, and a feeding pipe is also communicated with one side of the material distributing barrel; through two core designs of mechanical linkage self-adaptive regulation and intelligent on-demand energy supply, the energy efficiency ratio and the operation flexibility of the system are remarkably improved while the problem of powder conveying layering is solved, an efficient and reliable solution is provided for long-distance and multi-component powder pneumatic conveying, and compared with a static mixer, the energy efficiency of the system is greatly improved. The problem of separation caused by material characteristic difference is solved, and energy consumption increase caused by a multi-section mixer is avoided.

A burner (3) according to one embodiment is for generating a flame by burning an air / gas fuel mixture gas, and the burner comprises a cylindrical body (4A) that surrounds a premixing zone (40) including a plurality of mixing flow paths (8) disposed in the circumferential direction. The cylindrical body (4A) forms a nozzle (41) that injects the mixture gas. Further, the burner (3) comprises a plurality of static mixers (9) that mix the gas fuel and the air and that are disposed in the respective mixture flow paths (8).

The utility model discloses a diphenylmethane series amine reaction device, and belongs to the technical field of integrated condensation reactors, the diphenylmethane series amine reaction device comprises a salifying-condensation reactor, a plug flow reactor is arranged on one side of the salifying-condensation reactor, the salifying-condensation reactor comprises a reaction kettle, a double-layer hollow stirring shaft is arranged in the reaction kettle, and the double-layer hollow stirring shaft is connected with the plug flow reactor. A static mixer is arranged on one side of the reaction kettle; the multi-nozzle static mixer with the built-in condensation assembly can strengthen the mixing effect, the static mixer is directly connected with the reaction kettle, salt forming reaction liquid can be effectively prevented from staying in a pipeline and reducing the color of a system, and the hollow stirring shaft is beneficial to rapid mixing and timely removal of reaction heat; according to the device, aniline and hydrochloric acid as well as aniline hydrochloride and formaldehyde are rapidly and uniformly mixed, reaction heat is removed, local overheating and hot spots are avoided, generation of by-products can be reduced, colors of products and downstream products are effectively improved, the quality of the downstream products is improved, and the device is suitable for large-scale industrial production and high in synthesis efficiency.

To provide a static mixing apparatus for producing long-term sustainable ozone water that can be easily downsized and can sustain an ozone density for a long term even when inflow pressure of liquid is low.SOLUTION: A static mixing apparatus (40) produces long-term sustainable ozone water having ozone gas sustained for a long term, from liquid mixed with ozone including ozone gas. The static mixing apparatus comprises a static swirl flow generating part (41), arranged in a first tube (TU), which makes the liquid mixed with ozone conveyed from the first tube generate swirl flow, and a cavitation generating part (44), arranged in the first tube, which makes the liquid mixed with ozone swirled in the swirl flow generating part generate cavitation. The cavitation generating part (44) includes a shaft part, a first unit (441) in which a predetermined number of fins are arranged at a first angle around the shaft with respect to a direction of the first tube, and a second unit (442) in which a predetermined number of fins are arranged at the first angle around the shaft part.SELECTED DRAWING: Figure 2

A system for reducing blood loss during removal of material from a body lumen includes an elongate shaft, an aspiration lumen, and a flow resistance assembly. The elongate shaft can be placed within a blood vessel and has a distal end with an opening at the distal end. The aspiration lumen extends along the shaft and has a proximal end and a distal opening. The flow resistance assembly is associated with the aspiration lumen and is configured to resist blood flow through the aspiration lumen in a free-flow condition without operating a valve in fluid communication with the aspiration lumen. The flow resistance assembly may include a coiled section of tubing, a static mixer, or flow resistance structures.

The utility model discloses a urea solution dilution and mixing device, which relates to the technical field of solution dilution. The utility model comprises a first input pipe, a first control mechanism is arranged on the first input pipe near the right side, a second input pipe is arranged on the lower side of the first input pipe, a second control mechanism is arranged on the second input pipe near the right side, the right ends of the first input pipe and the second input pipe are both connected with the left side wall of a filter cartridge, a filter mesh sleeve is fixedly installed on the inner wall of the filter cartridge near the middle position, a mixing mechanism is arranged on the lower surface of a sealing cover, a connecting pipe is fixedly installed on the right side surface of the filter cartridge, and a static mixer is installed on the right side surface of the connecting pipe. The utility model has a double mixing and dilution function, so that the mixing is uniform, and the dilution and mixing efficiency is higher, so that the large-scale production needs can be met, and the dilution ratio can be more accurately controlled, so that the impurities in the urea solution can be filtered and purified, so that the urea solution can be processed and used later.

The invention discloses an automatic ammonia preparation device for adding ammonia water into condensed water at multiple points, and belongs to the technical field of industrial water treatment. Comprising an ammonia preparation unit, a multi-path adding unit and a control unit, the ammonia preparation unit comprises an ammonia water storage tank, a desalted water tank, a mixing and diluting tank, a first metering pump, a second metering pump and an online conductivity meter; the ammonia preparation unit is used for mixing ammonia water and desalted water in proportion; the multi-path adding unit comprises a main distribution pipeline and at least three parallel adding branches, each adding branch is communicated with a regulating valve, a flow meter and a static mixer, and the multi-path adding unit is used for adding mixed ammonia water to a plurality of adding points of the condensed water system; the control unit comprises a PLC (Programmable Logic Controller) and a pH sensor, the pH sensor is used for monitoring the pH value of condensed water at each feeding point, the PLC is in signal connection with the pH sensor, the online conductivity meter, the regulating valve and the flow meter, and the control unit is used for realizing dynamic flow distribution.

Formulation delivery systems, formulation delivery devices, and formulation cartridges for the same are provided. Formulation delivery systems include a reusable handle, a formulation dispensing assembly, and a controller. The formulation dispensing assembly includes a reciprocating nozzle assembly and a pump. The reciprocating nozzle assembly is fluidically-coupleable to the formulation cartridge or the cleaning cartridge received within the reusable handle. Formulation delivery devices include a reusable handle configured to receive a formulation cartridge therein, and a formulation dispensing assembly disposed in the reusable handle. The formulation dispensing assembly includes fluid conduits, a pump fluidically connected to the fluid conduits, a reciprocating nozzle assembly, and a controller. Formulation cartridges include a reusable cartridge body and a formulation cartridge refill unit.

The article is a static mixer used in a bioprocessing system used for mixing fluids.

The utility model discloses a novel static mixer, which belongs to the technical field of mixers, and comprises an inlet flange, a mixer shell is fixedly mounted at the top of the inlet flange, a wave-shaped long blade rod is arranged in the mixer shell, a rotating seat is rotatably mounted at the bottom of the wave-shaped long blade rod, and the rotating seat is fixedly mounted on the top of the inlet flange. A connecting ring is fixedly mounted at the bottom of the rotating seat, two groups of inserting grooves are formed in the connecting ring, mounting assemblies are arranged in the two groups of placing grooves, and two groups of placing grooves are formed in the inlet flange, so that an operator can more conveniently and quickly maintain equipment; compared with the prior art, potential safety risks in the maintenance process are reduced, the working safety is improved, the downtime of a production line is shortened, the working efficiency is improved, the wave-shaped long blade rod can be adjusted or replaced at any time according to needs so as to meet the requirements of different production processes or products, and the practicability of the device is greatly improved.

The utility model provides a natural gas hydrogen-doped static mixer which comprises a natural gas conveying pipeline and a hydrogen conveying pipeline which is vertically arranged on the side wall of the natural gas conveying pipeline. A plurality of first mixing structures and second mixing structures are sequentially arranged on the downstream of the communicating position of the hydrogen conveying pipeline and the natural gas conveying pipeline at intervals, each first mixing structure comprises a plurality of waved plates, and the waved plates are sequentially distributed left and right at intervals. The second mixing structure comprises a plurality of groups of first mixing sub-groups and second mixing sub-groups which are sequentially distributed at intervals from top to bottom; each of the first mixing sub-groups and the second mixing sub-groups comprises a plurality of strip-shaped partition plates. Natural gas and hydrogen are fully cut and mixed through the first mixing structure and the second mixing structure in the mixer, the mixing uniformity of the natural gas and the hydrogen is improved, and then the use safety of gas equipment is improved.