Efficient gas mixing system based on turbulent injection and control method

Abstract

The invention discloses an efficient gas mixing system based on turbulent jet and a control method.The system comprises an outer cylinder, a heat insulation layer is arranged between the outer cylinder and an inner cylinder, a flow guide plate, a heating grid, an annular pipeline and three perforated plates are sequentially arranged in the inner cylinder from top to bottom, and a mixed gas outlet is formed in the bottom of the inner cylinder; a nozzle of the first ejector and a nozzle of the second ejector are both arranged in the inner cylinder, a first electromagnetic valve is arranged at the end, located outside the outer cylinder, of the first ejector, a second electromagnetic valve is arranged at the end, located outside the outer cylinder, of the second ejector, one end of the water vapor input pipe is connected with a water vapor input device, and the other end of the water vapor input pipe is inserted into the inner cylinder and communicated with the annular pipeline. A mounting opening is formed in the outer wall of the inner cylinder, the temperature and pressure sensor is connected with the mounting opening, the mounting opening is formed below the bottommost perforated plate, and a plurality of spraying holes are formed in the periphery of the annular pipeline. By applying the scheme provided by the invention, the gas mixing uniformity can be improved, the mixing efficiency is improved, the equipment energy consumption is reduced, and the mixing stability is improved.

Description

Technical Field

[0001] The present invention relates to the field of gas mixing technology, and in particular to a high-efficiency gas mixing system based on turbulent injection and a control method thereof. Background Art

[0002] Gas mixing is a common operation in industrial production and energy conversion processes, widely used in chemical synthesis, fuel cells, syngas production, catalytic reactions, combustion systems, and other fields. Efficient gas mixing is crucial for increasing reaction rates, optimizing system performance, and reducing energy consumption.

[0003] At present, gas mixing methods mainly include three categories: static mixing, dynamic mixing, and jet mixing. Each method has certain advantages in different application scenarios, but also has obvious shortcomings.

[0004] 1. Static mixing method

[0005] Static mixing typically uses a static mixer, a mixing device with no moving parts. Baffles, spiral blades, or a mesh structure are typically installed inside the pipe to disturb and disperse the airflow as it passes through the static mixer, achieving a mixing effect. Typical static mixers include the Kenics mixer and the SMX mixer.

[0006] shortcoming:

[0007] Static mixers have low mixing efficiency for mixing gases at high flow rates and high density ratios, making it difficult to achieve a uniform gas phase distribution. Due to the lack of an active perturbation mechanism, the mixing process relies on the natural diffusion of the gas flow, resulting in long mixing times and slow response speeds. This also results in a large pressure drop, which increases system energy consumption at high flow rates.

[0008] 2. Dynamic mixing method

[0009] Dynamic mixing typically uses a dynamic mixer, which typically employs a mechanical impeller or rotating component to drive the mixing of airflows through external power. This method is suitable for gas-liquid and gas-solid mixing, as exemplified by common mechanically stirred reactors and turbine mixers.

[0010] shortcoming:

[0011] Due to its reliance on mechanical components, the equipment is complex, subject to wear and tear, and high maintenance costs. It also consumes significant energy, making it unsuitable for low-energy systems requiring long-term, stable operation. In high-speed airflow environments, mechanical mixing can create additional resistance, compromising mixing effectiveness.

[0012] 3. Jet mixing method

[0013] Jet mixing typically uses a jet mixer, which leverages the kinetic energy of a high-speed jet to create intense entrainment, collision, and shearing between gases, achieving mixing. This method is suitable for applications such as burners, syngas production, and fuel cell gas supply systems. Common types include single-nozzle and multi-nozzle jet mixers.

[0014] shortcoming:

[0015] Traditional single-nozzle spraying methods offer limited mixing uniformity, especially when mixing gases of varying densities, where weak shearing can lead to inadequate mixing. Relying solely on high-speed spraying may not effectively control mixing time and area, leading to localized gas distribution issues. In some applications, turbulence is not strong enough to achieve efficient mixing, especially when uniform mixing is required within a short period of time.

[0016] It can be seen that the existing gas mixing methods have poor gas mixing uniformity, low mixing efficiency, high equipment energy consumption and poor mixing stability. Summary of the Invention

[0017] The present invention provides a high-efficiency gas mixing system and control method based on turbulent injection, which can improve gas mixing uniformity, increase mixing efficiency, reduce equipment energy consumption, and improve mixing stability. The specific technical solution is as follows.

[0018] In a first aspect, the present invention provides a high-efficiency gas mixing system based on turbulent injection, comprising: an outer cylinder, an inner cylinder, a first ejector, a second ejector, a guide plate, a heating grid, a water vapor input pipe, an annular pipe, three porous plates, a temperature and pressure sensor, and a controller;

[0019] The inner cylinder is provided in the outer cylinder, a heat insulation layer is provided between the outer cylinder and the inner cylinder, the guide plate, the heating grid, the annular pipe and the three porous plates are provided in the inner cylinder from top to bottom, and a mixed gas outlet is provided at the bottom of the inner cylinder;

[0020] The nozzles of the first injector and the second injector are both sequentially passed through the top surface of the outer tube and the top surface of the inner tube and are arranged in the inner tube. A first solenoid valve is provided at one end of the first injector located outside the outer tube, and a second solenoid valve is provided at one end of the second injector located outside the outer tube.

[0021] One end of the water vapor input pipe is connected to the water vapor input device, and the other end is inserted into the inner cylinder and communicates with the annular pipe. The outer wall of the inner cylinder is provided with a mounting port, and the temperature and pressure sensor is connected to the mounting port, wherein the mounting port is provided below the lowest porous plate, and the outer periphery of the annular pipe is provided with a plurality of spray holes;

[0022] The first solenoid valve, the second solenoid valve, the heating grid, the water vapor input device and the temperature and pressure sensor are all electrically connected to the controller.

[0023] Optionally, the above-mentioned efficient gas mixing system based on turbulent injection further includes a support;

[0024] The support includes a support base plate and four brackets arranged above the support base plate;

[0025] The support base plate is provided with a first through hole opposite to the mixed gas outlet, and the four brackets are symmetrically distributed around the center point of the first through hole. The inner sides of the four brackets support the bottom of the inner tube, and the outer sides of the four brackets support the bottom of the outer tube.

[0026] Optionally, the inner cylinder includes an inner cylinder body, a first flat bottom seal head and a second flat bottom seal head;

[0027] The first flat bottom seal head and the second flat bottom seal head are fixedly connected to the upper and lower ends of the inner cylinder body respectively, and the second flat bottom seal head is provided with the mixed gas outlet.

[0028] Optionally, the outer cylinder includes an outer cylinder body, a first cover plate and a second cover plate;

[0029] The first cover plate and the second cover plate are fixedly connected to the upper and lower ends of the outer cylinder body respectively. The first cover plate is provided with a through hole for the first injector and a through hole for the second injector, and the second cover plate is provided with a second through hole corresponding to the mixer outlet.

[0030] In a second aspect, the present invention provides a control method for a high-efficiency gas mixing system based on turbulent injection, characterized in that the method is applied to the controller of the high-efficiency gas mixing system based on turbulent injection according to any one of the first aspects and includes:

[0031] Calculating a first flow rate when the first solenoid valve is opened according to the pressure and temperature of the first gas injected by the first injector and a preset gas flow calculation formula;

[0032] Calculating a second flow rate when the second solenoid valve is opened according to the pressure and temperature of the second gas injected by the second injector and a preset gas flow calculation formula;

[0033] Calculating a first power-on duration of the first solenoid valve based on the first flow rate, a first target flow rate to be reached by the first gas, and a control period of the first solenoid valve;

[0034] calculating a second power-on duration of the second solenoid valve based on the second flow rate, a second target flow rate to be reached by the second gas, and a control period of the second solenoid valve;

[0035] Controlling the first solenoid valve to be powered on for the first power-on duration, controlling the second solenoid valve to be powered on for the second power-on duration, controlling the first ejector to eject the first gas into the inner tube at the speed of sound, and controlling the second ejector to eject the second gas into the inner tube at the speed of sound;

[0036] The water vapor input device is controlled to input water vapor into the water vapor input pipe, and the heating grid is controlled to perform heating at a target heating power.

[0037] Optionally, the step of calculating the first flow rate when the first solenoid valve is opened according to the pressure and temperature of the first gas injected by the first injector and a preset gas flow calculation formula includes:

[0038] calculating a first product between a gas constant of the first gas and a temperature of the first gas;

[0039] calculating a first quotient between the first product and a gas molecular weight of the first gas;

[0040] calculating the square root of the first quotient;

[0041] The product of a flow coefficient of the nozzle of the first injector, an outlet cross-sectional area of the nozzle of the first injector, a pressure of the first gas, and the square root is calculated as the first flow rate.

[0042] Optionally, the step of controlling the power-on duration of the first solenoid valve to be the first power-on duration and controlling the power-on duration of the second solenoid valve to be the second power-on duration includes:

[0043] When the first target flow rate is the same as the second target flow rate, the opening time and the closing time of the first solenoid valve and the second solenoid valve are controlled to be the same;

[0044] When the first target flow rate is greater than the second target flow rate, the opening time of the second solenoid valve is delayed, and when the closing time of the first solenoid valve and the closing time of the second solenoid valve are reached, the first solenoid valve and the second solenoid valve are controlled to close respectively;

[0045] When the first target flow rate is less than the second target flow rate, the opening time of the first solenoid valve is delayed. When the closing time of the first solenoid valve and the closing time of the second solenoid valve are reached, the first solenoid valve and the second solenoid valve are controlled to close respectively.

[0046] Optionally, the delay duration of the opening time of the second solenoid valve is half of the difference between the first power-on duration and the second power-on duration;

[0047] The delay duration of the opening time of the first solenoid valve is half of the difference between the second power-on duration and the first power-on duration.

[0048] Optionally, the step of calculating a first power-on duration of the first solenoid valve based on the first flow rate, a first target flow rate to be reached by the first gas, and a control period of the first solenoid valve includes:

[0049] calculating a second quotient between the first target flow rate and the first flow rate;

[0050] The product of the second quotient and the control period of the first solenoid valve is calculated as the first power-on duration of the first solenoid valve.

[0051] Optionally, the target heating power is determined as follows:

[0052] calculating a difference between an outlet temperature of the mixed gas outlet detected by the temperature and pressure sensor and an initial temperature of the mixed gas, wherein the mixed gas is a gas formed by mixing the first gas, the second gas, and the water vapor;

[0053] The product of the total mass flow rate of the mixed gas, the specific heat capacity of the mixed gas, and the difference is calculated as the target heating power.

[0054] From the above content, it can be seen that an embodiment of the present invention provides an efficient gas mixing system based on turbulent injection and a control method. The efficient gas mixing system based on turbulent injection includes: an outer cylinder, an inner cylinder, a first injector, a second injector, a guide plate, a heating grid, a water vapor input pipe, an annular pipe, three porous plates, a temperature and pressure sensor and a controller. The outer cylinder is provided with an inner cylinder, and an insulation layer is provided between the outer cylinder and the inner cylinder. The inner cylinder is provided with a guide plate, a heating grid, an annular pipe and three porous plates from top to bottom. The bottom of the inner cylinder is provided with a mixed gas outlet, the nozzle of the first injector and the nozzle of the second injector are provided. The nozzles are sequentially positioned within the inner tube, passing through the top surfaces of the outer tube and the inner tube. A first solenoid valve is provided at one end of the first injector located outside the outer tube, and a second solenoid valve is provided at one end of the second injector located outside the outer tube. One end of a water vapor inlet pipe is connected to the water vapor inlet device, and the other end is inserted into the inner tube and communicates with the annular conduit. A mounting port is provided on the outer wall of the inner tube, and a temperature and pressure sensor is connected to the mounting port. The mounting port is located below the lowest perforated plate. The outer circumference of the annular conduit is provided with multiple nozzle holes. The first solenoid valve, the second solenoid valve, the heating grid, the water vapor inlet device, and the temperature and pressure sensor are all electrically connected to a controller. Thus, multiple types of gases are injected from the top through the first and second injectors. Water vapor is uniformly injected from the center of the mixing chamber through the water vapor inlet pipe and the annular conduit, merging with the airflow at the top. The annular conduit with multiple nozzle holes ensures uniform water vapor injection from multiple directions in the annular conduit, ensuring that water vapor enters the mixing chamber evenly rather than being concentrated in a single area. This optimizes airflow distribution, reduces temperature and concentration gradients between different gases, and improves mixing uniformity. A built-in heating grid simultaneously raises gas temperature, prevents water vapor condensation, optimizes the Reynolds number, and enhances mixing uniformity. The structure of two high-speed nozzles, a porous plate, and a guide plate enhances the shear effect, prevents gas stratification, and improves mixing efficiency. This eliminates the need for additional mechanical agitation or rotating parts, reducing maintenance requirements, lowering pressure loss, and reducing energy consumption while improving mixing stability.

[0055] The innovative features of the embodiments of the present invention include:

[0056] 1. Various types of gases are ejected from the top through the first and second ejectors. Water vapor is evenly injected from the middle of the mixing chamber through the water vapor inlet pipe and the annular pipe, merging with the top airflow. The annular pipe with multiple nozzles can ensure that water vapor is evenly injected from multiple directions in the annular ring, ensuring that water vapor can enter the mixing chamber evenly instead of being concentrated in a certain area, optimizing airflow distribution, reducing temperature and concentration gradients between different gases, and improving mixing uniformity. At the same time, the built-in heating grid is used to increase the gas temperature, prevent water vapor condensation, optimize the Reynolds number, and enhance mixing uniformity. The structure of two nozzles with high-speed injection + porous plate + guide plate can enhance the shear effect, prevent gas stratification, and improve mixing efficiency. No additional mechanical stirring or rotating parts are required, reducing maintenance requirements, reducing pressure loss, reducing equipment energy consumption, and improving mixing stability.

[0057] 2. By setting the upper two layers of porous plates in the three layers of porous plates to form an angle of + / -45 degrees with the central axis and the last layer of porous plates to form an angle of 0 degrees with the central axis, turbulent disturbance is enhanced, the gas shear effect is improved, and the mixing effect is improved.

[0058] 3. By setting four brackets in a symmetrical distribution with the center point of the first through hole as the center, the supporting force of the four brackets is improved. The inner sides of the four brackets support the bottom of the inner tube, and the outer sides of the four brackets support the bottom of the outer tube, so as to achieve the purpose of stably supporting the inner tube and the outer tube.

[0059] 4. By setting the first flat bottom head and the second flat bottom head to be fixedly connected to the upper and lower ends of the inner tube body respectively, installation is convenient, and the flat bottom structure can make the top and bottom of the inner tube flat, which is convenient for placing equipment, supporting structures or performing cleaning, maintenance and other operations.

[0060] 5. The first cover plate and the second cover plate are respectively fixedly connected to the upper and lower ends of the outer cylinder body, so as to facilitate disassembly and installation.

[0061] 6. The control method for a high-efficiency gas mixing system based on turbulent injection provided by an embodiment of the present invention ensures that the gas in the mixing chamber is always in a high-efficiency mixing state by controlling the power-on duration of the first solenoid valve to a first power-on duration, controlling the power-on duration of the second solenoid valve to a second power-on duration, controlling the first ejector to eject the first gas into the inner cylinder at the speed of sound, controlling the second ejector to eject the second gas into the inner cylinder at the speed of sound, controlling the water vapor input device to input water vapor into the water vapor input pipe, and controlling the heating grid to heat at a target heating power, thereby improving mixing efficiency. Furthermore, the structure of two high-speed nozzles + a porous plate + a guide plate can enhance the shear effect, prevent gas stratification, and improve mixing efficiency. Furthermore, controlling the heating grid to heat at a target heating power can prevent water vapor condensation, optimize the Reynolds number, and enhance mixing uniformity. The annular pipe with multiple nozzles ensures uniform water vapor injection from multiple directions in the annular ring, ensuring that water vapor enters the mixing chamber evenly rather than being concentrated in a single area. This optimizes airflow distribution, reduces temperature and concentration gradients between different gases, and improves mixing uniformity. No additional mechanical stirring or rotating parts are required, which reduces maintenance requirements, reduces pressure loss, reduces equipment energy consumption and improves mixing stability.

[0062] 7. When the first target flow rate is the same as the second target flow rate, the opening time and closing time of the first solenoid valve and the second solenoid valve are controlled to be the same; when the first target flow rate is greater than the second target flow rate, the opening time of the second solenoid valve is delayed, and when the closing time of the first solenoid valve and the closing time of the second solenoid valve are reached, the first solenoid valve and the second solenoid valve are controlled to be closed respectively; when the first target flow rate is less than the second target flow rate, the opening time of the first solenoid valve is delayed, and when the closing time of the first solenoid valve and the closing time of the second solenoid valve are reached, the first solenoid valve and the second solenoid valve are controlled to be closed respectively. By controlling the delay of the solenoid valves, the opening time of the gas with a smaller target flow rate can be in the middle section of the opening time of the gas with a larger target flow rate, thereby minimizing the duration of the separate injection and further enhancing the turbulent mixing effect.

[0063] 8. By setting the delay duration of the opening time of the second solenoid valve to half of the difference between the first power-on time and the second power-on time, the opening time of the second solenoid valve can be in the middle section of the opening time of the first solenoid valve, thereby reducing the duration of the second solenoid valve's single injection, which can further enhance the turbulent mixing effect; similarly, by setting the delay duration of the opening time of the first solenoid valve to half of the difference between the second power-on time and the first power-on time, the opening time of the first solenoid valve can be in the middle section of the opening time of the second solenoid valve, thereby reducing the duration of the first solenoid valve's single injection, which can further enhance the turbulent mixing effect.

[0064] 9. Through each solenoid valve, each nozzle is controlled to switch on and off at high speed and spray synchronously to achieve precise control of flow rate and better uniform effect.

[0065] 10. The integrated temperature and pressure sensor can calculate the difference between the outlet temperature of the mixed gas outlet and the initial temperature of the mixed gas. The total mass flow rate of the mixed gas, the specific heat capacity of the mixed gas and the product of the difference can be calculated as the target heating power, thereby accurately controlling the heating grid to heat at the target heating power, achieving precise feedback regulation, and improving system stability and adaptability.

[0066] Of course, it is not necessary to achieve all of the advantages described above simultaneously in order to implement any product or method of the present invention. BRIEF DESCRIPTION OF THE DRAWINGS

[0067] To more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the following briefly introduces the drawings required for use in the embodiments or the description of the prior art. Obviously, the drawings described below are merely some embodiments of the present invention. Those skilled in the art can derive other drawings based on these drawings without inventive effort.

[0068] Figure 1 A schematic diagram of the explosion structure of a high-efficiency gas mixing system based on turbulent injection provided by an embodiment of the present invention;

[0069] Figure 2 A schematic diagram of the assembly structure of a high-efficiency gas mixing system based on turbulent injection provided in an embodiment of the invention;

[0070] Figure 3 A schematic flow chart of a control method for a high-efficiency gas mixing system based on turbulent injection provided by an embodiment of the present invention;

[0071] Figure 4 Control diagram of the controller provided by the embodiment of the present invention

[0072] Figure 5 A first schematic diagram of the relationship between power-on time and gas flow rate;

[0073] Figure 6 This is a second schematic diagram showing the relationship between power-on time and gas flow rate.

[0074] Figure 1-Figure 2Among them, 1 outer tube, 11 outer tube body, 2 inner tube, 21 inner tube body, 22 first flat bottom head, 23 second flat bottom head, 3 first ejector, 4 second ejector, 5 guide plate, 6 heating grid, 7 steam input pipe, 8 annular pipe, 9 porous plate, 10 temperature and pressure sensor, 11 thermal insulation layer, 12 mixed gas outlet, 13 installation port, 14 support, 141 support bottom plate, 142 bracket, 143 first through hole, 15 first cover plate, 16 second cover plate, 17 second through hole. DETAILED DESCRIPTION

[0075] The following will provide a clear and complete description of the technical solutions in the embodiments of the present invention in conjunction with the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of them. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0076] It should be noted that the terms "including" and "having" and any variations thereof in the embodiments of the present invention and the accompanying drawings are intended to cover non-exclusive inclusions. For example, a process, method, system, product, or apparatus comprising a series of steps or units is not limited to the listed steps or units, but may optionally include steps or units not listed, or may optionally include other steps or units inherent to the process, method, product, or apparatus.

[0077] The embodiments of the present invention disclose a high-efficiency gas mixing system and control method based on turbulent injection, which can improve gas mixing uniformity, increase mixing efficiency, reduce equipment energy consumption, and improve mixing stability. The embodiments of the present invention are described in detail below.

[0078] Example 1

[0079] Figure 1 Schematic diagram of the explosion structure of the efficient gas mixing system based on turbulent injection provided by an embodiment of the present invention, Figure 2 Schematic diagram of the assembly structure of the efficient gas mixing system based on turbulent injection provided by the embodiment of the invention, see Figure 1 and Figure 2 The high-efficiency gas mixing system based on turbulent injection provided by an embodiment of the present invention includes: an outer cylinder 1, an inner cylinder 2, a first ejector 3, a second ejector 4, a guide plate 5, a heating grid 6, a water vapor input pipe 7, an annular pipe 8, three porous plates 9, a temperature and pressure sensor 10 and a controller.

[0080] An inner cylinder 2 is provided inside the outer cylinder 1, and an insulating layer 11 is provided between the outer cylinder 1 and the inner cylinder 2. That is to say, from the outside to the inside, there are the outer cylinder 1, the insulating layer 11 and the inner cylinder 2. A mixing chamber is formed inside the inner cylinder 2. The mixing chamber serves as the main space for gas mixing, providing sufficient volume to allow different gases to be fully mixed. At the same time, the mixing efficiency is enhanced through turbulence, and gas stratification or unmixed areas are reduced.

[0081] The thermal insulation layer 11 disposed between the outer tube 1 and the inner tube 2 can reduce heat loss, improve heating efficiency, ensure that the gas maintains a suitable temperature during the mixing process, and protect external equipment from high temperatures affecting other components or creating safety hazards. Exemplary materials for the thermal insulation layer 11 include mullite, quartz wool, or quartz sand.

[0082] Continue to see Figure 1 The inner tube 2 is provided with a guide plate 5, a heating grille 6, an annular pipe 8 and three porous plates 9 from top to bottom. The bottom of the inner tube 2 is provided with a mixed gas outlet 12, wherein the guide plate 5, the heating grille 6, the annular pipe 8 and the three porous plates 9 can be fixedly connected to the inner wall of the inner tube 2.

[0083] The guide plate 5 can be a spiral guide vane or a swirl blade. The guide plate 5 causes the straight high-speed flow gas in the inner tube 2 to form a rotational or tangential velocity component, destroying the flow field symmetry, enhancing the multi-directional stirring and turbulent energy distribution in the mixing chamber, and expanding the effective mixing area.

[0084] In addition, the guide plate 5 can control the direction of the airflow and guide the gas to flow along the specific path formed by the guide plate 5, avoiding problems such as backflow, dead zones or insufficient mixing; improve the turbulent structure, increase the disturbance of the gas during the flow process, and improve the mixing efficiency; reduce local pressure drop, optimize fluid dynamics characteristics, and avoid unnecessary energy loss.

[0085] The heating grid 6 can be heated by powering on, and heat is provided by electric heating, thereby increasing the gas temperature in the mixing chamber, improving the mixing effect, preventing gas condensation in the mixing chamber, especially water vapor condensation, thereby ensuring uniform mixing, and increasing the gas kinetic energy and Reynolds number, promoting the transition from laminar flow to turbulent flow, and the heating power can also be adjusted to optimize the mixing effect, as will be described later.

[0086] The holes on each porous plate 9 are angled to the axial direction to enhance gas mixing, diverting, disturbing, and remixing the gas. The three porous plates 9 are located downstream of the heating grid 6. Their high-density flow resistance enhances localized turbulence and shearing, resulting in more precise mixing.

[0087] The apertures of the porous plates 9 are uniform, or the apertures of the porous plates 9 become smaller or larger layer by layer from top to bottom. The apertures of the porous plates 9 become smaller layer by layer to prevent gas backflow, and the apertures of the porous plates 9 become larger layer by layer to evenly distribute the gas.

[0088] Furthermore, by setting the upper two layers of porous plates 9 in the three layers of porous plates 9 to form an angle of + / - 45 degrees with the central axis, and the last layer of porous plates 9 to form an angle of 0 degrees with the central axis, turbulent disturbance is enhanced, the gas shear effect is improved, and the mixing effect is improved.

[0089] In addition, the porous plate 9 can increase gas shear and turbulence, improve the gas mixing effect; reduce the unevenness of large-scale flow, and make the gas mixing more uniform; and multiple porous plates 9 can gradually refine the gas mixing, gradedly adjust the mixing degree, and avoid local enrichment or turbulent loss.

[0090] Continue to see Figure 1 The nozzle of the first injector 3 and the nozzle of the second injector 4 are successively passed through the top surface of the outer tube 1 and the top surface of the inner tube 2 and are arranged in the inner tube 2. The first injector 3 is located outside the outer tube 1 and is provided with a first solenoid valve at one end. The second injector 4 is located outside the outer tube 1 and is provided with a second solenoid valve at one end.

[0091] Among them, multiple gases, such as CO2, H2 and CO, can be sprayed into the mixing chamber at high speed through the nozzle of the first injector 3 and the nozzle of the second injector 4 at the top. The nozzle of the first injector 3 is controlled by the first solenoid valve for on-off and flow rate, and the nozzle of the second injector 4 is controlled by the second solenoid valve for on-off and flow rate, to ensure that the injected gas enters the mixing chamber at the speed of sound, thereby increasing the turbulence intensity and forming a strong impact mainstream. Then, water vapor is evenly injected from the middle of the mixing chamber through the annular pipe 8, and merges with the top airflow to form a strong opposite turbulence zone.

[0092] In other words, the high-speed main airflow at the top meets the water vapor jet, generating intense shear disturbances that quickly break down the gas interface structure and allow the components to initially mix. The high-speed jet causes the Reynolds number in the mixing chamber to rise rapidly, creating conditions for turbulent development.

[0093] The first solenoid valve and the second solenoid valve can also be linked with the temperature and pressure sensor 10 to optimize the intake state and improve the system control accuracy, as described below.

[0094] Continue to see Figure 1 The first injector 3 and the second injector 4 inject at least one type of gas, which may be CO2, H2 or CO.

[0095] One end of the water vapor input pipe 7 is connected to the water vapor input device, and the other end is inserted into the inner tube 2 and communicated with the annular pipe 8. A plurality of spray holes are provided on the outer periphery of the annular pipe 8.

[0096] The annular pipe 8 is used to inject the water vapor input by the water vapor input device into the mixing chamber through the annular pipe 8. The annular pipe 8 with multiple nozzles can ensure that the water vapor is evenly injected from multiple directions in the ring, ensuring that the water vapor can enter the mixing chamber evenly instead of concentrating in a certain area, optimizing the airflow distribution, reducing the temperature and concentration gradients between different gases, and improving the mixing uniformity.

[0097] An outer wall of the inner tube 2 is provided with a mounting port 13, and the temperature and pressure sensor 10 is connected to the mounting port 13, wherein the mounting port 13 is provided below the lowest porous plate 9, and the first solenoid valve, the second solenoid valve, the heating grid 6, the water vapor input device and the temperature and pressure sensor 10 are all electrically connected to the controller.

[0098] The sensing port of the temperature and pressure sensor 10 is directly plugged into the mounting port 13 to monitor the temperature and pressure of the mixed gas and feed the results back to the controller.

[0099] The controller can control the heating power of the first solenoid valve, the second solenoid valve and the heating grid 6 to ensure that the gas in the mixing chamber is always in a high mixing efficiency working state, see below for details.

[0100] Continue to see Figure 1 and Figure 2 The high-efficiency gas mixing system based on turbulent injection provided by the embodiment of the present invention further includes a support 14.

[0101] The support 14 includes a support base plate 141 and four brackets 142 arranged above the support base plate 141. The support base plate 141 is provided with a first through hole 143 opposite to the mixed gas outlet 12. The four brackets 142 are symmetrically distributed around the center point of the first through hole 143. The inner sides of the four brackets 142 support the bottom of the inner tube 2, and the outer sides of the four brackets 142 support the bottom of the outer tube 1.

[0102] Among them, the inner side of the bracket 142 is provided with an arc-shaped support notch that matches the bottom of the inner tube 2, and the outer side of the bracket 142 is provided with a right-angle support notch that matches the bottom of the outer tube 1. The diameter of the first through hole 143 is larger than the diameter of the mixed gas outlet 12.

[0103] Therefore, by arranging four brackets 142 symmetrically distributed with the center point of the first through hole 143 as the center, the supporting force of the four brackets 142 is improved, and the purpose of stably supporting the inner tube 2 and the outer tube 1 is achieved by supporting the bottom of the inner tube 2 with the inner sides of the four brackets 142 and supporting the bottom of the outer tube 1 with the outer sides of the four brackets 142.

[0104] Continue to see Figure 1 The inner tube 2 includes an inner tube body 21, a first flat bottom head 22 and a second flat bottom head 23.

[0105] The first flat bottom end 22 and the second flat bottom end 23 are fixedly connected to the upper and lower ends of the inner barrel body 21, respectively. The first flat bottom end 22 is provided with a hole for the first ejector 3 and a hole for the second ejector 4. The second flat bottom end 23 is provided with a mixed gas outlet 12. The inner barrel body 21 is provided with a hole for the steam input pipe 7. The fixed connection method can be welding.

[0106] Therefore, by setting the first flat bottom head 22 and the second flat bottom head 23 to be fixedly connected to the upper and lower ends of the inner tube body 21 respectively, installation is convenient, and the flat bottom structure can make the top and bottom of the inner tube 2 flat, which is convenient for placing equipment, supporting structures or performing cleaning, maintenance and other operations.

[0107] Continue to see Figure 1 The outer cylinder 1 includes an outer cylinder body 11 , a first cover plate 15 and a second cover plate 16 .

[0108] The first cover plate 15 and the second cover plate 16 are fixedly connected to the upper and lower ends of the outer cylinder body 11 respectively. Specifically, the upper and lower ends of the outer cylinder body 11 are provided with flanges, which are connected to the first cover plate 15 and the second cover plate 16 respectively through the flanges, which are convenient to install and easy to disassemble.

[0109] The first cover plate 15 is provided with a through hole for the first ejector 3 and a through hole for the second ejector 4. The outer cylinder body 11 is provided with a through hole for the water vapor input pipe 7 and a through hole for the temperature and pressure sensor 10. The second cover plate 16 is provided with a second through hole 17 corresponding to the mixed gas outlet 12. The diameter of the second through hole 17 is larger than the diameter of the mixed gas outlet 12.

[0110] Therefore, by providing the first cover plate 15 and the second cover plate 16 to be fixedly connected to the upper and lower ends of the outer cylinder body 11 respectively, disassembly and assembly are facilitated.

[0111] For ease of understanding, the following describes the workflow of an efficient gas mixing system based on turbulent injection provided by an embodiment of the present invention:

[0112] 1. Gas feeding and injection

[0113] The nozzle of the first ejector 3 and the nozzle of the second ejector 4 each eject multiple types of gases into the mixing chamber at the speed of sound, forming a strong turbulence to improve the mixing effect.

[0114] Water vapor is injected from the middle of the mixing chamber through the annular pipe 8 to ensure uniform distribution and avoid local enrichment or condensation.

[0115] The first solenoid valve and the second solenoid valve can dynamically adjust the flow rate of each nozzle according to the working conditions, ensuring that different gas types enter the mixing chamber in a set proportion.

[0116] 2. Turbulent mixing and heating

[0117] The gas entering the mixing chamber is quickly mixed under the action of turbulence, and the three porous plates 9 further increase shear and disturbance to optimize mixing uniformity.

[0118] The heating grid 6 provides heat to increase the gas temperature, prevent water vapor condensation, and optimize the gas diffusion rate, thereby improving the overall mixing effect.

[0119] The heat insulation layer 11 reduces heat loss, ensures a stable temperature in the mixing chamber, and improves heating efficiency.

[0120] 3. Flow control and optimization

[0121] The guide plate 5 guides the air flow along the set path formed by the guide plate 5 to prevent backflow or dead zones and ensure that all gases are fully mixed.

[0122] The multi-layer porous plates 9 can optimize the mixing step by step, reduce the unevenness of large-scale flow, enhance small-scale turbulence, and make the mixing more delicate.

[0123] 4. Temperature and pressure monitoring and feedback control

[0124] The temperature and pressure sensor 10 monitors the temperature and pressure in the mixing chamber in real time and provides data feedback to the controller.

[0125] The temperature and pressure sensor 10 realizes an optimal mixing state and a stable output through linkage control with the first injector 3, the second injector 4, and the heating grid 6.

[0126] The entire process ensures that various types of gases and water vapor are fully mixed in a short period of time, while optimizing temperature and fluid dynamics so that the mixed gas meets subsequent usage requirements.

[0127] 5. Uniform mixed gas output

[0128] After the above-mentioned multi-stage treatments of injection, turbulence, heating, refinement and real-time regulation, the mixed gas is basically evenly mixed at the mixed gas outlet 12 and can be directly transported to the subsequent reactor or treatment system to ensure the stability and reliability of the downstream process.

[0129] The high-efficiency gas mixing system based on turbulent injection provided by the embodiments of the present invention can achieve the following effects:

[0130] 1. Improve gas mixing uniformity:

[0131] The traditional mixer does not mix sufficiently. The present invention improves the shearing effect by combining two nozzles for spraying + two nozzles for spraying at different positions + porous plate 9 for turbulence + guide plate 5, so as to make the gas mix quickly and evenly.

[0132] 2. Enhance turbulent shear and improve mixing efficiency:

[0133] The structure of high-speed jet + porous plate 9 + guide plate 5 can enhance the shear effect, prevent gas stratification, and improve mixing efficiency.

[0134] 3. Shorten mixing time and improve response speed:

[0135] Both nozzles use sonic jet gas + two nozzles are arranged on both sides of the top to speed up the gas mixing process and improve the response speed.

[0136] 4. Reduce energy consumption and improve stability:

[0137] No additional mechanical stirring or rotating parts are required, which reduces maintenance needs, reduces pressure loss, reduces energy consumption and improves stability.

[0138] 5. Optimize flow matching and improve mixing stability:

[0139] The annular pipe 8 with the spray holes can ensure that water vapor is uniformly injected from multiple directions in the annular shape, thereby optimizing airflow matching, improving mixing effect, and enhancing mixing stability.

[0140] In summary, the high-efficiency gas mixing system based on turbulent injection provided by the embodiment of the present invention includes: an outer cylinder 1, an inner cylinder 2, a first ejector 3, a second ejector 4, a guide plate 5, a heating grid 6, a water vapor input pipe 7, an annular pipe 8, three porous plates 9, a temperature and pressure sensor 10 and a controller. The outer cylinder 1 is provided with an inner cylinder 2, and an insulating layer 11 is provided between the outer cylinder 1 and the inner cylinder 2. The inner cylinder 2 is provided with a guide plate 5, a heating grid 6, an annular pipe 8 and three porous plates 9 from top to bottom. The bottom of the inner cylinder 2 is provided with a mixed gas outlet 12, and the nozzle of the first ejector 3 and the nozzle of the second ejector 4 both pass through the top surface of the outer cylinder 1 in sequence. The top surface of the inner tube 2 is arranged in the inner tube 2, the first ejector 3 is located outside the outer tube 1 and is provided with a first solenoid valve at one end, the second ejector 4 is located outside the outer tube 1 and is provided with a second solenoid valve at one end, one end of the water vapor input pipe 7 is connected to the water vapor input device, and the other end is inserted into the inner tube 2 and communicated with the annular pipe 8, the outer wall of the inner tube 2 is provided with a mounting port 13, and the temperature and pressure sensor 10 is connected to the mounting port 13, wherein the mounting port 13 is provided below the lowest porous plate 9, and the outer periphery of the annular pipe 8 is provided with a plurality of spray holes, the first solenoid valve, the second solenoid valve, the heating grid 6, the water vapor input device and the temperature and pressure sensor 10 are all electrically connected to the controller. Thus, various types of gases are ejected from the top through the first ejector 3 and the second ejector 3, and water vapor is evenly injected from the middle of the mixing chamber through the water vapor input pipe 7 through the annular pipe 8 and merged with the top airflow. The annular pipe 8 with multiple nozzles can ensure that water vapor is evenly injected from multiple directions of the ring, ensuring that water vapor can evenly enter the mixing chamber instead of being concentrated in a certain area, optimizing the airflow distribution, reducing the temperature and concentration gradients between different gases, and improving the mixing uniformity. At the same time, the gas temperature is increased by the built-in heating grid 6 to prevent water vapor condensation, optimize the Reynolds number, and enhance the mixing uniformity. The structure of two nozzles for high-speed injection + porous plate 9 + guide plate 5 can enhance the shear effect, prevent gas stratification, and improve mixing efficiency. No additional mechanical stirring or rotating parts are required, which reduces maintenance requirements, reduces pressure loss, reduces equipment energy consumption, and improves mixing stability.

[0141] Example 2

[0142] Figure 3 This is a flow chart of a control method for a high-efficiency gas mixing system based on turbulent injection provided in an embodiment of the present invention, which is executed on the controller of the high-efficiency gas mixing system based on turbulent injection provided in Example 1. The method specifically includes the following steps.

[0143] S110: Calculating a first flow rate when the first solenoid valve is opened according to the pressure and temperature of the first gas injected by the first injector and a preset gas flow rate calculation formula.

[0144] Figure 4For a control diagram of a controller provided in an embodiment of the present invention, see Figure 4 Before injection, the controller may obtain the pressure and temperature of the first gas injected by the first injector. The specific acquisition method may be any method in the prior art, and the embodiment of the present invention does not impose any limitation thereto.

[0145] That is, the controller can obtain the pressure and temperature of the first gas injected by the first injector in real time, thereby calculating the gas flow rate of the first gas to be injected into the mixing chamber, that is, the first flow rate, and drive the first solenoid valve to perform the injection action.

[0146] In this embodiment of the present invention, a high-speed switching first solenoid valve and nozzle are used to precisely control the gas entering the mixing chamber. Based on the fluid dynamics and structural design, when the nozzle is in critical flow (i.e., reaching the speed of sound at the outlet), the flow rate depends solely on the upstream pressure and temperature and is independent of the downstream pressure, achieving relatively stable metering. Therefore, the first flow rate when the first solenoid valve is open can be calculated based on the pressure and temperature of the first gas injected by the first injector and a preset gas flow calculation formula.

[0147] Step S110 may include:

[0148] calculating a first product between a gas constant of the first gas and a temperature of the first gas;

[0149] calculating a first quotient between the first product and a gas molecular weight of the first gas;

[0150] Calculate the square root of the first quotient;

[0151] The product of the flow coefficient of the nozzle of the first ejector, the outlet cross-sectional area of the nozzle of the first ejector, the pressure of the first gas and the square root is calculated as the first flow rate.

[0152] Specifically, when the nozzle outlet flow velocity reaches the speed of sound, the preset gas flow calculation formula is as follows:

[0153]

[0154] Among them, P0, T0——pressure and temperature of the first gas

[0155] R——gas constant

[0156] M——gas molecular weight

[0157] A——Exit cross-sectional area of the nozzle of the first injector

[0158] C——Flow coefficient of the nozzle of the first ejector, generally around 1

[0159] Q——First traffic

[0160] When the first gas is a mixed gas of multiple types, P0, T0, R and M in the above formula are the pressure, temperature, gas constant and gas molecular weight of the mixed gas of multiple types.

[0161] S120: Calculating a second flow rate when the second solenoid valve is opened according to the pressure and temperature of the second gas injected by the second injector and a preset gas flow rate calculation formula.

[0162] Before injection, the controller may obtain the pressure and temperature of the second gas injected by the second injector. The specific acquisition method may be any method in the prior art, and the embodiment of the present invention does not impose any limitation thereto.

[0163] That is, the controller can obtain the pressure and temperature of the second gas injected by the second injector in real time, thereby calculating the gas flow rate of the second gas to be injected into the mixing chamber, that is, the second flow rate, and drive the second solenoid valve to perform the injection action.

[0164] In this embodiment of the present invention, a high-speed switching second solenoid valve and nozzle are used to precisely control the gas entering the mixing chamber. Based on the fluid dynamics and structural design, when the nozzle is in critical flow (i.e., reaching the speed of sound at the outlet), the flow rate depends solely on the upstream pressure and temperature, and is independent of the downstream pressure, achieving relatively stable metering. Therefore, the second flow rate when the second solenoid valve is open can be calculated based on the pressure and temperature of the second gas injected by the second injector and a preset gas flow calculation formula.

[0165] The calculation method of the second flow is the same as the calculation method of the first flow. For details, please refer to the relevant description in step S110, which will not be repeated here.

[0166] S130: Calculate a first power-on duration of the first solenoid valve based on the first flow rate, a first target flow rate to be reached by the first gas, and a control period of the first solenoid valve.

[0167] Since the diameter of the solenoid valve is fixed, when the upstream air pressure is maintained at a relatively stable point, the flow rate when the solenoid valve is opened is fixed. Therefore, the amount of air entering the mixing chamber each time can be adjusted by changing the power-on time of the solenoid valve. Figure 4 shown.

[0168] Figure 5 The first diagram of the relationship between power-on time and gas flow rate is shown in Figure 5, the horizontal axis is time, the vertical axis is the target gas volume, q1 is the first target flow rate, q2 is the second target flow rate, the nozzle state refers to the switch state of the first nozzle and the second nozzle, ON refers to the open state, OFF refers to the closed state, and T is the control period of the first solenoid valve.

[0169] Depend on Figure 5 It can be seen that the amount of gas entering the mixing chamber per unit time can be adjusted by changing the length of the power-on time within a fixed control cycle of the solenoid valve. Therefore, it is necessary to calculate the first power-on time of the first solenoid valve based on the first flow rate, the first target flow rate to be achieved by the first gas, and the control cycle of the first solenoid valve, wherein the first target flow rate to be achieved by the first gas is calculated in advance and sent to the controller.

[0170] Step S130 may include:

[0171] calculating a second quotient between the first target flow rate and the first flow rate;

[0172] The product of the second quotient and the control period of the first solenoid valve is calculated as the first power-on time length of the first solenoid valve.

[0173] Specifically, the first power-on duration is calculated using the following formula:

[0174] t1=q1 / Q1×T

[0175] in:

[0176] t1——The first power-on duration of the first solenoid valve

[0177] q1——first target traffic

[0178] Q1 - the first flow, is the continuous flow when the nozzle of the first injector is fully open

[0179] T——Control cycle of the first solenoid valve, generally 10ms~100ms

[0180] S140: Calculate a second power-on duration of the second solenoid valve based on the second flow rate, a second target flow rate to be reached by the second gas, and a control period of the second solenoid valve.

[0181] The second power-on duration of the second solenoid valve is calculated in the same manner as the first power-on duration. For details, refer to step S130 and are omitted here. The second target flow rate of the second gas is precalculated and sent to the controller. The control period of the second solenoid valve is the same as that of the first solenoid valve.

[0182] S150: Control the power-on duration of the first solenoid valve to be the first power-on duration, control the power-on duration of the second solenoid valve to be the second power-on duration, control the first ejector to eject the first gas into the inner tube at the speed of sound, and control the second ejector to eject the second gas into the inner tube at the speed of sound.

[0183] After determining the first power-on duration and the second power-on duration, the power-on duration of the first solenoid valve can be controlled to be the first power-on duration, the power-on duration of the second solenoid valve can be controlled to be the second power-on duration, the first injector can be controlled to inject the first gas into the inner cylinder at the speed of sound, and the second injector can be controlled to inject the second gas into the inner cylinder at the speed of sound.

[0184] In order to achieve a better mixing effect, different gases in the embodiment of the present invention are individually controlled using their own nozzles to accurately control the amount of gas entering the mixing chamber. However, when multiple nozzles are involved, collaborative work becomes particularly important. In order to achieve a better turbulent mixing effect, each solenoid valve needs to be coordinated and controlled.

[0185] Specifically, the step of controlling the power-on duration of the first solenoid valve to be the first power-on duration and controlling the power-on duration of the second solenoid valve to be the second power-on duration includes:

[0186] When the first target flow rate is the same as the second target flow rate, the opening time and the closing time of the first solenoid valve and the second solenoid valve are controlled to be the same;

[0187] When the first target flow rate is greater than the second target flow rate, the opening time of the second solenoid valve is delayed, and when the closing time of the first solenoid valve and the closing time of the second solenoid valve are reached, the first solenoid valve and the second solenoid valve are controlled to close respectively;

[0188] When the first target flow rate is less than the second target flow rate, the opening time of the first solenoid valve is delayed. When the closing time of the first solenoid valve and the closing time of the second solenoid valve are reached, the first solenoid valve and the second solenoid valve are controlled to close respectively.

[0189] Figure 6 For the second diagram of the relationship between power-on time and gas flow rate, see Figure 6 , the horizontal axis is time, the vertical axis is target gas volume, q1 is the first target flow rate, q2 is the second target flow rate, the nozzle 1 state is only the state of the nozzle of the first injector, the nozzle 2 state refers to the state of the nozzle of the second injector, t1 is the first power-on time, and t2 is the second power-on time.

[0190] See also Figure 6 ,The collaborative control method is mainly to control the delayed opening of the solenoid valve, that is, when the first target flow rate and the second target flow rate are the same, the opening time and closing time of the first and second solenoid valves are controlled to be the same;

[0191] When the first target flow rate is greater than the second target flow rate, the opening time of the second solenoid valve is delayed, and when the closing time of the first solenoid valve and the closing time of the second solenoid valve are reached, the first solenoid valve and the second solenoid valve are controlled to close respectively;

[0192] When the first target flow rate is less than the second target flow rate, the opening time of the first solenoid valve is delayed. When the closing time of the first solenoid valve and the closing time of the second solenoid valve are reached, the first solenoid valve and the second solenoid valve are controlled to close respectively.

[0193] The purpose of controlling the delayed opening of the solenoid valve is to make the opening time of the gas with a smaller target flow rate be in the middle of the opening time of the gas with a larger target flow rate, thereby minimizing the duration of the separate injection and further enhancing the turbulent mixing effect.

[0194] Specifically, the delay duration of the opening time of the second solenoid valve is half of the difference between the first power-on time and the second power-on time (t1-t2) / 2, and the delay duration of the opening time of the first solenoid valve is half of the difference between the second power-on time and the first power-on time (t2-t1) / 2.

[0195] Therefore, by setting the delay duration of the opening time of the second solenoid valve to half of the difference between the first power-on time and the second power-on time, the opening time of the second solenoid valve can be in the middle section of the opening time of the first solenoid valve, thereby reducing the duration period of the second solenoid valve's single injection, which can further enhance the turbulent mixing effect; similarly, by setting the delay duration of the opening time of the first solenoid valve to half of the difference between the second power-on time and the first power-on time, the opening time of the first solenoid valve can be in the middle section of the opening time of the second solenoid valve, thereby reducing the duration period of the first solenoid valve's single injection, which can further enhance the turbulent mixing effect.

[0196] Therefore, when the first target flow rate is the same as the second target flow rate, the opening time and closing time of the first solenoid valve and the second solenoid valve are controlled to be the same; when the first target flow rate is greater than the second target flow rate, the opening time of the second solenoid valve is delayed, and when the closing time of the first solenoid valve and the closing time of the second solenoid valve are reached, the first solenoid valve and the second solenoid valve are controlled to be closed respectively; when the first target flow rate is less than the second target flow rate, the opening time of the first solenoid valve is delayed, and when the closing time of the first solenoid valve and the closing time of the second solenoid valve are reached, the first solenoid valve and the second solenoid valve are controlled to be closed respectively. By controlling the delay of the solenoid valves, the opening time of the gas with a smaller target flow rate can be in the middle section of the opening time of the gas with a larger target flow rate, thereby minimizing the duration of the separate injection and further enhancing the turbulent mixing effect.

[0197] At the same time, each solenoid valve controls the high-speed on-off and injection synchronization of each nozzle to achieve precise control of flow and better uniformity.

[0198] S160: Control the water vapor input device to input water vapor into the water vapor input pipe, and control the heating grid to heat at the target heating power.

[0199] After controlling the first ejector to eject the first gas into the inner tube at the speed of sound and controlling the second ejector to eject the second gas into the inner tube at the speed of sound, it is also necessary to control the water vapor input device to input water vapor into the water vapor input pipe.

[0200] To prevent condensation when the water vapor mixes with the remaining injected gases, when the water vapor temperature is low, the heating grid in the mixing chamber needs to be controlled in real time to heat at a target heating power to maintain a stable high temperature for the mixed gas in the mixing chamber. The water vapor temperature can be obtained in advance and sent to the controller when the water vapor input device inputs water vapor into the water vapor input pipe.

[0201] Specifically, the target heating power is determined as follows:

[0202] Calculating a difference between an outlet temperature of a mixed gas outlet detected by a temperature and pressure sensor and an initial temperature of the mixed gas, wherein the mixed gas is a gas formed by mixing the first gas, the second gas, and water vapor;

[0203] The product of the total mass flow rate of the mixed gas, the specific heat capacity of the mixed gas and the difference is calculated as the target heating power.

[0204] Specifically, the target heating power is calculated using the following formula:

[0205]

[0206] in:

[0207] Q——Target heating power (W or kW)

[0208] ——Total mass flow rate of mixed gas (kg / s)

[0209] c p,混合 ——Specific heat capacity of the gas mixture (J / kg·K)

[0210] T f ——Outlet temperature of the mixed gas outlet (K)

[0211] T 混合初始 ——The initial temperature of the mixed gas (K), calculated by the following formula:

[0212]

[0213] in,

[0214] n i ——Number of moles of gas i

[0215] C vi ——The constant volume heat capacity of the i-th gas (J / mol·K)

[0216] T i ——initial temperature of the i-th gas (K)

[0217] The total mass flow rate of the mixed gas and the specific heat capacity of the mixed gas can be calculated by the existing total mass flow rate calculation method and the specific heat capacity calculation method and sent to the controller. The outlet temperature of the mixed gas outlet is Figure 4 The temperature of the mixed gas in .

[0218] Therefore, the difference between the outlet temperature of the mixed gas outlet and the initial temperature of the mixed gas can be calculated through the integrated temperature and pressure sensor, and the total mass flow rate of the mixed gas, the specific heat capacity of the mixed gas and the product of the difference can be calculated as the target heating power, so as to accurately control the heating grid to heat with the target heating power, realize precise feedback regulation, and improve the stability and adaptability of the system.

[0219] As can be seen from the above content, the control method for a high-efficiency gas mixing system based on turbulent injection provided in an embodiment of the present invention can calculate a first flow rate when the first solenoid valve is opened based on the pressure and temperature of the first gas injected by the first injector and a preset gas flow calculation formula; calculate a second flow rate when the second solenoid valve is opened based on the pressure and temperature of the second gas injected by the second injector and a preset gas flow calculation formula; calculate a first power-on duration of the first solenoid valve based on the first flow rate, a first target flow rate to be achieved by the first gas, and a control period of the first solenoid valve; calculate a second power-on duration of the second solenoid valve based on the second flow rate, a second target flow rate to be achieved by the second gas, and a control period of the second solenoid valve; control the power-on duration of the first solenoid valve to be the first power-on duration, and control the power-on duration of the second solenoid valve to be the second power-on duration; control the first injector to inject the first gas into the inner cylinder at the speed of sound; control the second injector to inject the second gas into the inner cylinder at the speed of sound; control the water vapor input device to input water vapor into the water vapor input pipe; and control the heating grid to heat at a target heating power. Thus, the controller controls the energization duration of the first solenoid valve to a first energization duration, the energization duration of the second solenoid valve to a second energization duration, controls the first ejector to eject the first gas into the inner cylinder at the speed of sound, controls the second ejector to eject the second gas into the inner cylinder at the speed of sound, controls the water vapor input device to input water vapor into the water vapor input pipe, and controls the heating grid to heat at a target heating power. This ensures that the gases in the mixing chamber are always in a high mixing efficiency state, thereby improving mixing efficiency. Furthermore, the structure of two high-speed nozzles + a porous plate + a guide plate enhances the shear effect, prevents gas stratification, and improves mixing efficiency. Furthermore, controlling the heating grid to heat at a target heating power prevents water vapor condensation, optimizes the Reynolds number, and enhances mixing uniformity. The annular pipe with multiple nozzles ensures uniform water vapor injection from multiple directions around the annular ring, ensuring that water vapor enters the mixing chamber evenly rather than being concentrated in a single area. This optimizes airflow distribution, reduces temperature and concentration gradients between different gases, and improves mixing uniformity. No additional mechanical stirring or rotating parts are required, which reduces maintenance requirements, reduces pressure loss, reduces equipment energy consumption and improves mixing stability.

[0220] Those skilled in the art will appreciate that the accompanying drawings are merely schematic diagrams of an embodiment, and the modules or processes in the accompanying drawings are not necessarily required to implement the present invention.

[0221] Those skilled in the art will appreciate that the modules in the apparatuses of the embodiments may be distributed in the apparatuses of the embodiments as described in the embodiments, or may be located in one or more apparatuses different from the embodiments with corresponding changes. The modules in the above embodiments may be combined into one module or further divided into multiple sub-modules.

[0222] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit it. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or make equivalent replacements for some of the technical features therein. However, these modifications or replacements do not deviate the essence of the corresponding technical solutions from the spirit and scope of the technical solutions of the embodiments of the present invention.

Claims

1. An efficient gas mixing system based on turbulent injection, characterized in that: include: Outer cylinder, inner cylinder, first ejector, second ejector, guide plate, heating grid, steam input pipe, annular pipe, three porous plates, temperature and pressure sensors and controller; The inner cylinder is provided in the outer cylinder, a heat insulation layer is provided between the outer cylinder and the inner cylinder, the guide plate, the heating grid, the annular pipe and the three porous plates are provided in the inner cylinder from top to bottom, and a mixed gas outlet is provided at the bottom of the inner cylinder; The nozzles of the first injector and the second injector are both sequentially passed through the top surface of the outer tube and the top surface of the inner tube and are arranged in the inner tube. A first solenoid valve is provided at one end of the first injector located outside the outer tube, and a second solenoid valve is provided at one end of the second injector located outside the outer tube. One end of the water vapor input pipe is connected to the water vapor input device, and the other end is inserted into the inner cylinder and communicates with the annular pipe. The outer wall of the inner cylinder is provided with a mounting port, and the temperature and pressure sensor is connected to the mounting port, wherein the mounting port is provided below the lowest porous plate, and the outer periphery of the annular pipe is provided with a plurality of spray holes; The first solenoid valve, the second solenoid valve, the heating grid, the water vapor input device and the temperature and pressure sensor are all electrically connected to the controller.

2. The high-efficiency gas mixing system based on turbulent injection according to claim 1, characterized in that: Also includes a support; The support includes a support base plate and four brackets arranged above the support base plate; The support base plate is provided with a first through hole opposite to the mixed gas outlet, and the four brackets are symmetrically distributed around the center point of the first through hole. The inner sides of the four brackets support the bottom of the inner tube, and the outer sides of the four brackets support the bottom of the outer tube.

3. The high-efficiency gas mixing system based on turbulent injection according to claim 1, characterized in that: The inner cylinder comprises an inner cylinder body, a first flat bottom seal head and a second flat bottom seal head; The first flat bottom seal head and the second flat bottom seal head are fixedly connected to the upper and lower ends of the inner cylinder body respectively, and the second flat bottom seal head is provided with the mixed gas outlet.

4. The high-efficiency gas mixing system based on turbulent injection according to claim 1, characterized in that: The outer cylinder comprises an outer cylinder body, a first cover plate and a second cover plate; The first cover plate and the second cover plate are fixedly connected to the upper and lower ends of the outer cylinder body respectively. The first cover plate is provided with a through hole for the first injector and a through hole for the second injector, and the second cover plate is provided with a second through hole corresponding to the mixer outlet.

5. A control method for an efficient gas mixing system based on turbulent injection, characterized in that: The method is applied to the controller of the efficient gas mixing system based on turbulent injection according to any one of claims 1 to 4 and includes: Calculating a first flow rate when the first solenoid valve is opened according to the pressure and temperature of the first gas injected by the first injector and a preset gas flow calculation formula; Calculating a second flow rate when the second solenoid valve is opened according to the pressure and temperature of the second gas injected by the second injector and a preset gas flow calculation formula; Calculating a first power-on duration of the first solenoid valve based on the first flow rate, a first target flow rate to be reached by the first gas, and a control period of the first solenoid valve; calculating a second power-on duration of the second solenoid valve based on the second flow rate, a second target flow rate to be reached by the second gas, and a control period of the second solenoid valve; Controlling the first solenoid valve to be powered on for the first power-on duration, controlling the second solenoid valve to be powered on for the second power-on duration, controlling the first ejector to eject the first gas into the inner tube at the speed of sound, and controlling the second ejector to eject the second gas into the inner tube at the speed of sound; The water vapor input device is controlled to input water vapor into the water vapor input pipe, and the heating grid is controlled to perform heating at a target heating power.

6. The control method of the efficient gas mixing system based on turbulent injection according to claim 5, characterized in that: The step of calculating the first flow rate when the first solenoid valve is opened according to the pressure and temperature of the first gas injected by the first injector and a preset gas flow calculation formula includes: calculating a first product between a gas constant of the first gas and a temperature of the first gas; calculating a first quotient between the first product and a gas molecular weight of the first gas; calculating the square root of the first quotient; The product of a flow coefficient of the nozzle of the first injector, an outlet cross-sectional area of the nozzle of the first injector, a pressure of the first gas, and the square root is calculated as the first flow rate.

7. The control method of the efficient gas mixing system based on turbulent injection according to claim 5, characterized in that: The step of controlling the power-on duration of the first solenoid valve to be the first power-on duration and controlling the power-on duration of the second solenoid valve to be the second power-on duration includes: When the first target flow rate is the same as the second target flow rate, the opening time and the closing time of the first solenoid valve and the second solenoid valve are controlled to be the same; When the first target flow rate is greater than the second target flow rate, the opening time of the second solenoid valve is delayed, and when the closing time of the first solenoid valve and the closing time of the second solenoid valve are reached, the first solenoid valve and the second solenoid valve are controlled to close respectively; When the first target flow rate is less than the second target flow rate, the opening time of the first solenoid valve is delayed. When the closing time of the first solenoid valve and the closing time of the second solenoid valve are reached, the first solenoid valve and the second solenoid valve are controlled to close respectively.

8. The control method of the efficient gas mixing system based on turbulent injection according to claim 7, characterized in that: The delay duration of the opening time of the second solenoid valve is half of the difference between the first power-on duration and the second power-on duration; The delay duration of the opening time of the first solenoid valve is half of the difference between the second power-on duration and the first power-on duration.

9. The control method of the efficient gas mixing system based on turbulent injection according to claim 5, characterized in that: The step of calculating a first power-on duration of the first solenoid valve based on the first flow rate, a first target flow rate to be reached by the first gas, and a control period of the first solenoid valve includes: calculating a second quotient between the first target flow rate and the first flow rate; The product of the second quotient and the control period of the first solenoid valve is calculated as the first power-on duration of the first solenoid valve.

10. The control method of the efficient gas mixing system based on turbulent injection according to claim 5, characterized in that: The target heating power is determined as follows: calculating a difference between an outlet temperature of the mixed gas outlet detected by the temperature and pressure sensor and an initial temperature of the mixed gas, wherein the mixed gas is a gas formed by mixing the first gas, the second gas, and the water vapor; The product of the total mass flow rate of the mixed gas, the specific heat capacity of the mixed gas, and the difference is calculated as the target heating power.

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