A gas mixing device

Abstract

This application discloses a gas mixing device, relating to the field of gas mixing, comprising a tubular main body and a mixing pipe. The tubular main body has a hollow cavity, with one end serving as a first gas inlet and the other as a mixed gas outlet. The hollow cavity contains a mixing pipe and an air pipe. One end of the mixing pipe serves as a second gas inlet, and the other end as a first gas distributor. The gas flow direction of the second gas inlet is different from that of the first gas distributor. One end of the air pipe serves as an air inlet, and the other end connects to the mixing pipe. The second gas inlet and the air inlet are located outside the hollow cavity, while the first gas distributor is located inside the hollow cavity. The gas flow direction of the air pipe is different from that of the second gas inlet and the first gas distributor. The mixing pipe has a branch pipe, one end of which connects to the mixing pipe and is located within the hollow cavity. The gas flow direction of the branch pipe is different from that of the first gas distributor. The branch pipe is provided with a first number of second gas distributors. In this application, the gas flow directions are different, and the gas distributors can increase the contact area, reducing the occurrence of uneven gas mixing.

Description

Technical Field

[0001] This application relates to the field of gas blending technology, and more particularly to a gas blending device. Background Technology

[0002] Gas blending technology refers to the technique of mixing other gases (such as air or ammonia) into gas to adjust parameters such as gas concentration and combustion characteristics. Gas blending technology has advantages such as improving gas utilization and ensuring gas combustion safety.

[0003] Currently, gas blending devices are commonly used for gas mixing. These devices have a single inlet for each gas and a single outlet. Gases of different concentrations and other gases are introduced through their respective single inlets and mixed within the hollow cavity of the blending device. Finally, the mixed gas is output from the outlet. However, current gas blending devices often suffer from uneven gas mixing. Utility Model Content

[0004] In view of the above problems, this application provides a gas mixing device to reduce the occurrence of uneven gas mixing. The specific solution is as follows:

[0005] The first aspect of this application provides a gas mixing device, which includes a tubular main body and a mixing pipe.

[0006] The tubular body has a hollow cavity inside, one end of the tubular body is the first gas inlet, and the other end of the tubular body is the mixed gas outlet;

[0007] The hollow cavity is provided with a gas mixing pipe. One end of the gas mixing pipe is a second gas inlet, which is located outside the hollow cavity. The other end of the gas mixing pipe is a first gas distribution hole, which is located inside the hollow cavity. The gas flow direction of the second gas inlet is different from that of the first gas distribution hole.

[0008] An air pipe is also provided in the hollow cavity. One end of the air pipe is an air inlet located outside the hollow cavity. The other end of the air pipe is connected to the mixing pipe. The gas flow direction in the air pipe is different from the gas flow direction of the second gas inlet and different from the gas flow direction of the first gas distribution hole.

[0009] The gas mixing pipe is provided with multiple branch pipes, one end of each branch pipe is connected to the gas mixing pipe, each branch pipe is located in the hollow cavity, and the gas flow direction in the branch pipe is different from the gas flow direction in the first gas distribution hole.

[0010] Each of the branch pipes is provided with a first number of second air distribution holes.

[0011] In one possible implementation, the other end of each branch is an open end.

[0012] In one possible implementation, the air inlet of the air duct is connected to one end of the first branch pipe, and the air inlet of the air duct is connected to one end of the second branch pipe;

[0013] The other end of the first branch pipe is connected to the first fan, and the other end of the second branch pipe is connected to the second fan. The pressure outputs of the first fan and the second fan are different.

[0014] In one possible implementation, both the first fan and the second fan are communicatively connected to the gas mixing control system.

[0015] In one possible implementation, the first branch pipe is sequentially equipped with a check valve, a regulating valve, and a pressure transmitter along the air flow direction of the pipeline, and the second branch pipe is sequentially equipped with the check valve, the regulating valve, and the pressure transmitter along the air flow direction of the pipeline.

[0016] In one possible implementation, the regulating valve is communicatively connected to the gas mixing control system.

[0017] In one possible implementation, the mixed gas outlet of the gas mixing device is connected to the gas utilization system.

[0018] In one possible implementation, a pressure transmitter, a gas concentration meter, and a vent pipe are sequentially arranged along the flow direction of the mixed gas on the connecting pipeline from the outlet of the mixed gas to the gas utilization system.

[0019] In one possible implementation, a pressure transmitter is installed in the gas delivery pipeline connected to the first gas inlet of the gas mixing device.

[0020] In one possible implementation, the pressure transmitter is communicatively connected to the gas mixing control system.

[0021] By means of the above technical solution, this application provides a gas mixing device, which includes a tubular main body and a mixing pipe. The tubular main body has a hollow cavity with a first gas inlet and a mixed gas outlet. The first gas inlet is used to input gas, so that the hollow cavity is filled with gas. A mixing pipe and an air pipe are arranged in the hollow cavity. One end of the air pipe is connected to the mixing pipe, and the gas flow direction in the air pipe is different from the gas flow direction at the second gas inlet of the mixing pipe, allowing for better mixing of the different gas flows and the air. Furthermore, the gas flow direction at the first gas distribution hole at the other end of the mixing pipe is different from both the gas flow direction in the air pipe and the gas flow direction at the second gas inlet, allowing the air and gas to continue mixing as they flow towards the first gas distribution hole. The mixing pipe is further equipped with multiple branch pipes, and the gas flow direction of the branch pipes is different from that of the first gas distribution port. Each branch pipe also has a first number of second gas distribution ports, allowing the mixed gas in the mixing pipe to flow not only from the first gas distribution port to the hollow cavity but also from the second gas distribution ports to the air cavity. Because the gas distribution ports disperse the mixed gas in the mixing pipe into an airflow, increasing the contact area between the gases, the mixed gas in the mixing pipe can mix better with the gas in the hollow cavity, and finally exit from the mixed gas outlet of the hollow cavity. The different gas flow directions in each pipe of this device improve the mixing effect of the gas in the mixing pipe, and the gas distribution ports further enhance the mixing effect by dispersing the gas into an airflow and increasing the contact area between the gases. Therefore, this device can effectively reduce the occurrence of uneven gas mixing. Attached Figure Description

[0022] The above and other features, advantages, and aspects of the embodiments of this disclosure will become more apparent from the accompanying drawings and the following detailed description. Throughout the drawings, the same or similar reference numerals denote the same or similar elements. It should be understood that the drawings are schematic, and the originals and elements are not necessarily drawn to scale.

[0023] Figure 1 This is a top view of a gas mixing device provided in an embodiment of this application;

[0024] Figure 2 This is a right-side structural schematic diagram of a gas mixing device provided in an embodiment of this application;

[0025] Figure 3 This is a schematic diagram of the gas flow direction in a gas mixing device provided in an embodiment of this application;

[0026] Figure 4 A top view of another gas mixing device provided in this application embodiment;

[0027] Figure 5 This is a schematic diagram of the external connection of a gas mixing device provided in an embodiment of this application.

[0028] Figure label:

[0029] 1-Tubular main body; 2-Mixing pipe; 3-First gas inlet; 4-Mixed gas outlet; 5-Second gas inlet; 6-First gas distribution port; 7-Air inlet; 8-Branch pipe; 9-Second gas distribution port; 10-Pressure transmitter; 11-Drain valve; 12-Gas concentration meter; 13-Vent pipe; 14-First blower; 15-Second blower; 16-Check valve; 17-Regulating valve. Detailed Implementation

[0030] The embodiments of this application are described below with reference to the accompanying drawings. The terminology used in the implementation section of this application is for explaining specific embodiments only and is not intended to limit the scope of this application.

[0031] The embodiments of this application will now be described with reference to the accompanying drawings. Those skilled in the art will recognize that, with technological advancements and the emergence of new scenarios, the technical solutions provided in the embodiments of this application are equally applicable to similar technical problems.

[0032] The terms "first," "second," etc., used in the specification and accompanying drawings of this application are used to distinguish similar objects and are not necessarily used to describe a specific order or sequence. It should be understood that such terms can be used interchangeably where appropriate; this is merely a way of distinguishing objects with the same attributes in the embodiments of this application. Furthermore, the terms "comprising" and "having," and any variations thereof, are intended to cover non-exclusive inclusion, so that a process, method, system, product, or apparatus that comprises a series of units is not necessarily limited to those units, but may include other units not explicitly listed or inherent to those processes, methods, products, or apparatuses.

[0033] Methane gas refers to a flammable gas, primarily composed of methane, found in coalbed methane in mines. A methane blending device is a specialized piece of equipment used to adjust the mixing ratio of methane and air. In recent years, methane has gradually begun to be extracted and used as a resource, and methane blending devices have experienced rapid development.

[0034] The current gas mixing method involves centrally inputting different concentrations of methane and other gases into a gas mixing device, mixing them in the hollow cavity of the device, and then directly outputting the mixture. This current method suffers from poor mixing uniformity, leading to localized exceedances of methane concentrations, such as in gas dead zones (areas where gas cannot flow effectively or participate in gas exchange).

[0035] To address the aforementioned problems, this application provides a gas mixing device. This device incorporates a mixing pipe and a gas distribution hole structure within its hollow cavity, increasing the gas contact area and enabling multiple mixing processes. This promotes gas mixing and reduces uneven gas mixing. The gas mixing device of this application embodiment will be described in detail below with reference to the accompanying drawings.

[0036] Reference Figure 1 and Figure 2 , Figure 1 This is a top view schematic diagram of a gas mixing device provided in an embodiment of this application. Figure 2 This is a right-side structural schematic diagram of a gas mixing device provided in an embodiment of this application, as shown below. Figure 1 and Figure 2 As shown in the figure, a gas mixing device provided in this application embodiment may include a tubular body 1 and a mixing pipe 2. These structures will be described in detail below.

[0037] The tubular body 1 has a hollow cavity inside. One end of the tubular body 1 is the first gas inlet 3, and the other end of the tubular body 1 is the mixed gas outlet 4.

[0038] A gas mixing pipe 2 is provided in the hollow cavity. One end of the gas mixing pipe 2 is a second gas inlet 5, which is located outside the hollow cavity. The other end of the gas mixing pipe 2 is a first gas distribution hole 6, which is located inside the hollow cavity. The gas flow direction of the second gas inlet 5 is different from that of the first gas distribution hole 6.

[0039] An air pipe is also provided in the hollow cavity. One end of the air pipe is an air inlet 7, which is located outside the hollow cavity. The other end of the air pipe is connected to the mixing pipe 2. The gas flow direction in the air pipe is different from the gas flow direction of the second gas inlet 5 and the gas flow direction in the air pipe is different from the gas flow direction of the first gas distribution hole 6.

[0040] Multiple branch pipes 8 are provided on the mixing pipe 2. One end of each branch pipe 8 is connected to the mixing pipe 2. Each branch pipe 8 is located in a hollow cavity. The gas flow direction in the branch pipe 8 is different from the gas flow direction in the first gas distribution hole 6.

[0041] Each branch pipe 8 is provided with a first number of second air distribution holes 9.

[0042] The hollow cavity is used to provide a mixing space for gas of different concentrations, and its shape is not limited.

[0043] The first gas inlet can be a larger gas inlet of the hollow cavity, used to input gas into the hollow cavity. Specifically, in this embodiment, the first gas inlet is mainly used to input high-concentration gas into the hollow cavity, and the diameter of the first gas inlet can be 500 mm.

[0044] The mixed gas outlet is used to output the mixed gas. The diameter of the mixed gas outlet can be larger than that of the first gas inlet. Of course, in another optional embodiment, the diameter of the mixed gas outlet can be smaller than that of the first gas inlet or the same as that of the first gas inlet. Specifically, in this embodiment, the diameter of the mixed gas outlet is larger than that of the first gas inlet, and the diameter of the mixed gas outlet can be 800 mm.

[0045] The mixing pipe is used to mix gas and air. Specifically, in this embodiment, one end of the mixing pipe is a second gas inlet, and the other end is a first air distribution port, which is additionally connected to the mixing pipe by an air pipe. Of course, in another optional embodiment, one end of the mixing pipe can be divided into a second gas inlet and an air inlet, and the other end is the first air distribution port.

[0046] The second gas inlet can be a larger gas inlet in the mixing pipe. The gas concentration input through the second gas inlet can be different from the gas concentration input through the first gas inlet. Of course, in another optional embodiment, the gas concentration input through the second gas inlet can be the same as the gas concentration input through the first gas inlet. Furthermore, the size of the second gas inlet can be the same as or different from the first gas inlet. Specifically, in this embodiment, the second gas inlet is used to input low-concentration gas into the mixing pipe, and the size of the second gas inlet is the same as the first gas inlet; the diameter of the second gas inlet can be 500 mm.

[0047] The first gas distributor is used to output the mixed gas from the mixing pipe. The mixed gas output from the first gas distributor can mix with the gas in the hollow cavity. In another optional embodiment, the mixed gas output from the first gas distributor can be directly output from the mixed gas outlet. The size of the first gas distributor can be different from the size of the other end of the mixing pipe. Specifically, in this embodiment, the diameter of the first gas distributor is smaller than the diameter of the other end of the mixing pipe. The diameter of the first gas distributor can be 150 mm. Therefore, when the mixed gas in the mixing pipe is output from the first gas distributor, the first gas distributor can refine the mixed gas into an airflow to increase the contact area of ​​the mixed gas and improve the mixing effect between the mixed gas and the gas in the hollow cavity. Furthermore, the diameter, number, and distribution of the first gas distributor can be optimized according to different actual working conditions.

[0048] The air duct can be a conduit for air circulation, with air entering through the air inlet and passing through the other end into the mixing pipe. The size of the air duct can differ from that of the mixing pipe. Specifically, in this embodiment, the diameter of the air duct is smaller than the diameter of the mixing pipe, making the diameter of the air inlet smaller than the diameter of the second gas inlet. The diameter of the air inlet can be 300 mm.

[0049] Furthermore, in order to avoid the gas in the hollow cavity affecting the gas mixing in the mixing pipe, this embodiment chooses to place the second gas inlet and air inlet outside the hollow cavity.

[0050] Reference Figure 3 , Figure 3 This is a schematic diagram of the gas flow direction in a gas mixing device provided in an embodiment of this application, as shown below. Figure 3 As shown, the gas flow direction in the air duct (air inlet 7) is different from the gas flow direction in the second gas inlet 5. Specifically, in this embodiment, the low-concentration gas flowing in through the second gas inlet and the air flowing in through the air inlet flow in opposite directions (the two gases flow in opposite directions respectively). This relative movement of flow directions can break the concentration boundary layer between the low-concentration gas and the air, prolonging the contact time and enhancing turbulent diffusion, effectively improving the mixing effect of the low-concentration gas and the air. Furthermore, in this embodiment, the diameter of the air inlet is smaller than the diameter of the second gas inlet. Therefore, when the inflow rates of air and low-concentration gas are constant, the air velocity flowing in through the air inlet can be greater than the gas velocity flowing in through the second gas inlet. When air and low-concentration gas meet, due to the velocity difference between the air and the low-concentration gas, vortices can be formed, thereby promoting the mixing of air and low-concentration gas in the mixing pipe. Therefore, the flow direction settings of the low-concentration gas and air, as well as the inlet diameter settings in this embodiment, can effectively improve the gas mixing effect.

[0051] When a low concentration of gas and air mixes at one end of the mixing pipe, it can flow to the other end. For example... Figure 3 As shown, the gas flow direction at the second gas inlet 5 is different from that at the first gas distributor 6, and the gas flow direction inside the air pipe (air inlet 7) is also different from that at the first gas distributor 6. Therefore, when the mixed gas at one end of the mixing pipe flows to the first gas distributor at the other end of the mixing pipe, the gas flow direction can change. At the point of change in gas flow direction, the gas velocity distribution can become uneven, and this uneven velocity can form vortices, promoting further mixing of the mixed gas. Furthermore, the first gas distributor being located at the other end of the mixing pipe and the bend in the mixing pipe lengthen the actual flow path of the mixed gas, effectively increasing the mixing time of the mixed gas.

[0052] The branch pipe is a vent pipe installed on the body of the mixing pipe, used for the flow of the mixed gas in the mixing pipe to the hollow cavity. The other end of each branch pipe can be an open end; in another optional embodiment, the other end of each branch pipe can be a closed end. The mixed gas in the mixing pipe can flow into the hollow cavity from the second vent on the branch pipe. The diameter of the branch pipe can be smaller than the diameter of the mixing pipe; specifically, the diameter of the branch pipe can be 250 mm. The branch pipes can be positioned close to the first vent and can be evenly distributed along the circumference of the mixing pipe. Specifically, as shown... Figure 2 As shown, in this embodiment, three branch pipes 8 are provided on the body of the mixing pipe 2, and the branch pipes 8 are evenly distributed at 120-degree intervals around the circumference of the mixing pipe 2 (one branch pipe 8 is provided every 120 degrees). Of course, in another optional embodiment, the branch pipe distribution can be optimized according to actual operating conditions (such as gas flow rate, pressure, etc.), for example, by increasing the number or diameter of the branch pipes. Figure 3 As shown, since the gas flow direction of the branch pipe 8 is different from that of the first gas distribution hole 6, when the mixed gas flowing to the first gas distribution hole 6 flows to the branch pipe 8, the change in gas flow direction can also promote further mixing of the mixed gas at the point where the gas flow direction changes.

[0053] The second gas distribution orifice is a gas distribution orifice located on the branch pipe, used to refine the mixed gas flowing from the mixing pipe to the hollow cavity. The diameter of the second gas distribution orifice can be different from or the same as the diameter of the first gas distribution orifice, but the diameter of the second gas distribution orifice must be smaller than the diameter of the branch pipe. Specifically, in this embodiment, the diameter of the second gas distribution orifice can be 50 mm. The first quantity refers to the number of second gas distribution orifices set on the branch pipe. The first quantity should not be less than two to avoid partial blockage of the gas distribution orifices, which would affect gas mixing. The second gas distribution orifice can be located on the pipe body of the branch pipe, and its diameter, number, and distribution can be optimized according to different actual working conditions. Specifically, for example... Figure 1 As shown, in this embodiment, the second air distribution holes 9 can be evenly distributed along the circumference of the branch pipe 8 at 120 degrees (one second air distribution hole 9 is set every 120 degrees), so the first quantity is three. The branch pipe disperses the mixed gas into multiple fine airflows through multiple second air distribution holes and then flows into the hollow cavity, which can increase the contact area between the mixed gas and the high-concentration gas in the hollow cavity and promote the mixing of the mixed gas and the high-concentration gas.

[0054] The mixing pipe can first mix low-concentration gas with air, and then mix it with high-concentration gas. This allows the gas mixing device in this embodiment to support the mixing and utilization of gas of all concentrations, thereby reducing the venting rate of low-concentration gas. Furthermore, the gas distribution hole structure (first and second gas distribution holes) on the mixing pipe effectively disperses the flow path of the mixed gas, reducing the risk of sudden pressure changes within the mixing pipe and resulting in a more uniform pressure distribution, thus reducing the impact of the mixed gas on the mixing pipe. The gas distribution hole structure, by dispersing the airflow through multiple paths, can reduce local pressure drop and energy loss, improving energy efficiency. The gas distribution hole structure also prevents high-velocity gas from concentrating and impacting a single point in the mixing pipe, and it allows for thorough mixing at lower gas velocities, preventing wear and tear on the mixing pipe or downstream equipment caused by high-velocity gas.

[0055] In addition, such as Figure 4As shown, the gas blending device in this embodiment can also be equipped with a pressure transmitter 10 and a drain valve 11. A pressure transmitter can refer to a device that converts a pressure signal into a measurable electrical signal. In this embodiment, the pressure transmitter can be installed at the first gas inlet of the gas blending device to monitor the gas pressure at the first gas inlet. Of course, a pressure transmitter can also be installed at the second gas inlet. The drain valve is usually installed at the lowest point of the gas blending device and can be used to remove impurities (such as solid particles, rust, etc.), condensate, or residual gas accumulated in the gas blending device (to vent residual gas during shutdown or maintenance to ensure safe operation). The drain valve can be an electric or pneumatic drain valve and has good sealing performance.

[0056] This application provides a gas mixing device comprising a tubular body and a mixing pipe. The tubular body has a hollow cavity with a first gas inlet and a mixed gas outlet. The first gas inlet is used to input gas, filling the hollow cavity with gas. The hollow cavity contains the mixing pipe and an air pipe. One end of the air pipe is connected to the mixing pipe, and the gas flow direction in the air pipe is different from the gas flow direction at the second gas inlet of the mixing pipe, allowing for better mixing of the different gas flows and the air. Furthermore, the gas flow direction at the first gas distribution hole at the other end of the mixing pipe is different from both the gas flow direction in the air pipe and the gas flow direction at the second gas inlet, allowing the air and gas to continue mixing as they flow towards the first gas distribution hole. The mixing pipe is further equipped with multiple branch pipes, and the gas flow direction of the branch pipes is different from that of the first gas distribution port. Each branch pipe also has a first number of second gas distribution ports, allowing the mixed gas in the mixing pipe to flow not only from the first gas distribution port to the hollow cavity but also from the second gas distribution ports to the air cavity. Because the gas distribution ports disperse the mixed gas in the mixing pipe into an airflow, increasing the contact area between the gases, the mixed gas in the mixing pipe can mix better with the gas in the hollow cavity, and finally exit from the mixed gas outlet of the hollow cavity. The different gas flow directions in each pipe of this device improve the mixing effect of the gas in the mixing pipe, and the gas distribution ports further enhance the mixing effect by dispersing the gas into an airflow and increasing the contact area between the gases. Therefore, this device can effectively reduce the occurrence of uneven gas mixing.

[0057] In another possible implementation, refer to Figure 5 , Figure 5 This is a connection diagram of a gas mixing device provided in an embodiment of this application, as shown below. Figure 5As shown, a pressure transmitter 10 is installed in the gas delivery pipeline connected to the first gas inlet 3 of the gas blending device. The mixed gas outlet 4 of the gas blending device can be connected to the gas utilization system. Along the flow direction of the mixed gas, a pressure transmitter 10, a gas concentration meter 12, and a vent pipe 13 are sequentially arranged on the connecting pipeline from the mixed gas outlet 4 to the gas utilization system. The gas concentration meter can be a device for measuring the concentration of gas in a pipeline. Specifically, in this embodiment, the gas concentration meter used can be a laser methane concentration meter. The laser methane concentration meter utilizes the absorption characteristics of methane molecules at a specific wavelength, emitting a tunable semiconductor laser beam and measuring the light intensity attenuation after it passes through the gas to calculate the methane concentration. The vent pipe can be a device for discharging gas from the pipeline. In this embodiment, the mixed gas from the gas blending device flows out from the mixing port and enters the gas utilization system, while a portion of excess gas can be released from the vent pipe according to control needs, maintaining stable pipeline pressure. A gas utilization system can refer to a system that utilizes a mixture of gas for energy purposes, such as a power generation system or a heating system.

[0058] In another possible implementation, such as Figure 5 As shown, the air inlet 7 of the air duct of the gas mixing device can be connected to one end of the first branch pipe, the air inlet 7 of the air duct can be connected to one end of the second branch pipe, the other end of the first branch pipe can be connected to the first fan 14, and the other end of the second branch pipe can be connected to the second fan 15. The pressure outputs of the first fan 14 and the second fan 15 are different.

[0059] In this embodiment, the first and second blowers can be devices that provide air to the gas mixing device at the required pressure. The pressure outputs of the first and second blowers are different. Specifically, in this embodiment, the first blower can be a Roots blower, and the second blower can be a centrifugal blower. In a Roots blower, two impellers move relative to each other within a cylinder, compressing the gas and creating a continuous airflow. Therefore, Roots blowers are suitable for high-pressure, low-volume applications. In a centrifugal blower, the impeller generates centrifugal force through rotation, accelerating and expelling the gas. Therefore, centrifugal blowers are suitable for low-pressure, high-volume applications. When the pipeline pressure is high, this embodiment can use a Roots blower to provide air to the gas mixing device; when the pipeline pressure is low, this embodiment can use a centrifugal blower to provide air to the gas mixing device.

[0060] The first branch pipe can be a pipe connecting the first fan to the air inlet, and the second branch pipe can be a pipe connecting the second fan to the air inlet, and, if Figure 5As shown, a check valve 16, a regulating valve 17, and a pressure transmitter 10 are sequentially arranged along the air flow direction of the first branch pipe, and the same applies to the second branch pipe. Alternatively, in another optional embodiment, the positions of the check valve 16, regulating valve 17, and pressure transmitter 10 on the first and second branches can be changed. The check valve can be an automatic valve used to prevent backflow of the medium (such as liquid or gas) in the pipeline, ensuring that the medium flows only in one direction. In this embodiment, the check valve is used to prevent backflow of gas in the gas mixing device when the fan stops. The regulating valve can be a valve that controls the flow rate and pressure of the medium. In this embodiment, a regulating butterfly valve is used to control the airflow and pressure of the fan by adjusting the valve opening.

[0061] Furthermore, the aforementioned sensors, such as the pressure transmitter, the first blower, the second blower, the regulating valve, and the gas concentration meter, can all communicate with the gas blending control system. Of course, in addition to the sensors mentioned above, additional sensors can be installed according to actual operating conditions and communicated with the gas blending control system. The gas blending control system obtains sensor data such as pressure and gas concentration, and uses this data to control the frequency converters of the first and second blowers and the opening of the regulating valve, thereby controlling the blower airflow (controlling air volume) to regulate the gas concentration in the pipeline, ensuring that the gas concentration of the mixed gas output by the gas blending device meets the concentration requirements of the gas utilization system. Specifically, the gas blending control system can use PID regulation. The gas blending control system can also monitor parameters such as gas flow, temperature, and pressure in various pipelines in real time, using non-dispersive infrared technology (a gas detection technology based on infrared spectroscopy analysis) to achieve continuous and accurate monitoring of gas concentration.

[0062] It is understood that before using the technical solutions disclosed in the various embodiments of this disclosure, users should be informed of the types, scope of use, and usage scenarios of the personal information involved in this disclosure in an appropriate manner in accordance with relevant laws and regulations, and user authorization should be obtained.

[0063] The above are merely embodiments of this application and are not intended to limit the scope of this application. Various modifications and variations can be made to this application by those skilled in the art. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this application should be included within the protection scope of this application.

Claims

1. A gas mixing device, characterized in that, The gas mixing device includes a tubular main body and a mixing pipe. The tubular body has a hollow cavity inside, one end of the tubular body is the first gas inlet, and the other end of the tubular body is the mixed gas outlet; The hollow cavity is provided with a gas mixing pipe. One end of the gas mixing pipe is a second gas inlet, which is located outside the hollow cavity. The other end of the gas mixing pipe is a first gas distribution hole, which is located inside the hollow cavity. The gas flow direction of the second gas inlet is different from that of the first gas distribution hole. An air pipe is also provided in the hollow cavity. One end of the air pipe is an air inlet located outside the hollow cavity. The other end of the air pipe is connected to the mixing pipe. The gas flow direction in the air pipe is different from the gas flow direction of the second gas inlet and different from the gas flow direction of the first gas distribution hole. The gas mixing pipe is provided with multiple branch pipes, one end of each branch pipe is connected to the gas mixing pipe, each branch pipe is located in the hollow cavity, and the gas flow direction in the branch pipe is different from the gas flow direction in the first gas distribution hole. Each of the branch pipes is provided with a first number of second air distribution holes.

2. The gas blending device according to claim 1, characterized in that, The other end of each of the branch pipes is an open end.

3. The gas blending device according to claim 1, characterized in that, The air inlet of the air duct is connected to one end of the first branch pipe, and the air inlet of the air duct is connected to one end of the second branch pipe; The other end of the first branch pipe is connected to the first fan, and the other end of the second branch pipe is connected to the second fan. The pressure outputs of the first fan and the second fan are different.

4. The gas blending device according to claim 3, characterized in that, Both the first fan and the second fan are communicatively connected to the gas mixing control system.

5. The gas blending device according to claim 3, characterized in that, The first branch pipe is provided with a check valve, a regulating valve and a pressure transmitter in sequence along the air flow direction of the pipeline. The second branch pipe is provided with the check valve, the regulating valve and the pressure transmitter in sequence along the air flow direction of the pipeline.

6. The gas blending device according to claim 5, characterized in that, The regulating valve is communicatively connected to the gas mixing control system.

7. The gas blending device according to claim 1, characterized in that, The mixed gas outlet of the gas mixing device is connected to the gas utilization system.

8. The gas blending device according to claim 7, characterized in that, A pressure transmitter, a gas concentration meter, and a vent pipe are sequentially installed along the gas flow direction on the connecting pipeline from the outlet of the mixed gas to the gas utilization system.

9. The gas blending device according to claim 1, characterized in that, A pressure transmitter is installed in the gas delivery pipeline connected to the first gas inlet of the gas mixing device.

10. The gas blending device according to any one of claims 5, 8 and 9, characterized in that, The pressure transmitter is communicatively connected to the gas mixing control system.

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