A gas mixing system

Abstract

The invention relates to the technical field of glass production equipment, and discloses a gas mixing system, which is applied to the mixing of fossil fuel gas and hydrogen; the system comprises: a controller, a first flow control device, a second flow control device and a static mixing device; a first pipeline structure and a second pipeline structure are both connected to the static mixing device, and the first gas and the second gas are transported to the static mixing device for mixing; the static mixing device is provided with a ratio analyzer which is communicatively connected to the controller; the controller controls the first flow control device and the second flow control device according to the received mixing ratio parameters to control the flow of the first gas and the second gas, thereby realizing the control of the mixing ratio of the first gas and the second gas in the static mixing device, so that the first gas and the second gas are mixed according to a preset ratio, thereby improving the uniformity of the mixing, ensuring the safety of combustion, and reducing the occurrence of safety accidents.

Description

Technical Field

[0001] The invention relates to the technical field of glass production equipment, and in particular to a gas mixing system. Background Art

[0002] The glass industry is a large energy consumer. The main thermal equipment includes melting furnaces, tin baths and annealing furnaces. Among them, glass melting furnaces are key equipment in the glass production process, and their energy consumption accounts for more than 90% of the total production energy consumption. At present, glass melting furnaces usually use fossil fuels such as natural gas or heavy oil as the main energy source. However, with the increasing concern for environmental sustainability and the growing demand for clean energy, the application of hydrogen in glass melting furnaces has gradually received attention as a potential alternative energy source.

[0003] As a clean energy, hydrogen has high calorific value and excellent combustion performance. Its application in glass melting furnaces can significantly reduce carbon emissions and help address global climate change. In addition, in order to improve the output and quality of glass, the existing process often uses a nozzle at the feed port and 1 # Set 0 between small furnaces # Oxygen lance is used to pre-melt glass batch materials. This process not only speeds up the melting rate of the batch materials and improves the clarification effect of the glass liquid, but also reduces the emission of waste gas and dust such as nitrogen oxides.

[0004] Based on the high calorific value of hydrogen, # Adding hydrogen into the oxygen lance combustion gas can further increase the # The melting capacity of the oxygen lance can improve the energy efficiency of glass production. However, there is currently a lack of equipment that can efficiently mix hydrogen and fossil fuel gases. Summary of the invention

[0005] In view of this, the present invention provides a gas blending system to solve the problem in the prior art that when hydrogen and fossil fuel gas are mixed and burned, uneven mixing leads to uneven glass melting and low glass quality.

[0006] In order to solve the above technical problems, the technical solution of the present invention is as follows:

[0007] The present invention provides a gas blending system, which is applied to the mixing of fossil fuel gas and hydrogen; it comprises: a controller, a first flow control device, a second flow control device and a static mixing device; the first flow control device is communicatively connected to the controller, and the first flow control device is provided with a first pipeline structure suitable for conveying a first gas; the second flow control device is communicatively connected to the controller, and the second flow control device is provided with a second pipeline structure suitable for conveying a second gas, the first pipeline structure and the second pipeline structure are both connected to the static mixing device, the first gas and the second gas are suitable for mixing in the static mixing device, a ratio analyzer communicatively connected to the controller is provided in the static mixing device, the ratio analyzer is suitable for detecting a mixing ratio parameter of the first gas and the second gas, and feeding the mixing ratio parameter back to the controller, the controller controls the first flow control device and the second flow control device according to the received mixing ratio parameter to control the conveying flow rate of the first gas and the second gas.

[0008] The invention has the following advantages: the first flow control device is provided with a first pipeline structure for conveying the first gas, the second flow control device is provided with a second pipeline structure for conveying the second gas, the first pipeline structure and the second pipeline structure are both connected with the static mixing device, so that the first gas and the second gas are conveyed to the static mixing device for mixing, the static mixing device is provided with a ratio analyzer which is communicatively connected with the controller, the ratio analyzer is suitable for detecting the mixing ratio parameters of the first gas and the second gas, and feeding back to the controller, the controller controls the first flow control device and the second flow control device according to the received mixing ratio parameters, so as to control the flow rates of the first gas and the second gas, so as to realize the control of the mixing ratio of the first gas and the second gas in the static mixing device, so that the first gas and the second gas are mixed according to the preset ratio, the uniformity of the mixing is improved, the sufficient combustion is ensured, the melting efficiency is improved, and the carbon emission is reduced.

[0009] According to some embodiments of the present invention, the first pipeline structure includes a first gas source interface and a first delivery pipe group, the front end of the first delivery pipe group is connected to the first gas source interface, the rear end of the first delivery pipe group is connected to the static mixing device, and the first delivery pipe group includes a first main delivery pipe and a first spare delivery pipe arranged in parallel;

[0010] The second pipeline structure includes a second gas source interface and a second delivery pipe group, the front end of the second delivery pipe group is connected to the second gas source interface, the rear end of the second delivery pipe group is connected to the static mixing device, and the second delivery pipe group includes a second main delivery pipe and a second spare delivery pipe arranged in parallel.

[0011] According to some embodiments of the present invention, a monitoring component is provided between the rear end of the first conveying pipe group and the static mixing device, and between the rear end of the second conveying pipe group and the static mixing device, and the monitoring component includes a first flow monitoring component and a first pressure monitoring component which are arranged in sequence at intervals, and the first flow monitoring component and the first pressure monitoring component are both communicatively connected to the controller.

[0012] According to some embodiments of the present invention, a check valve group is provided between the first gas source interface and the first delivery pipe group, and between the second gas source interface and the second delivery pipe group, and the check valve group includes a first ball valve and / or a first check valve.

[0013] According to some embodiments of the present invention, a first purge interface is provided between the check valve group and the first delivery pipe group, and between the check valve group and the second delivery pipe group, and a second purge interface is provided between the monitoring component and the static mixing device.

[0014] According to some embodiments of the present invention, a plurality of first gas source interfaces are provided, and the plurality of first gas source interfaces are arranged in parallel.

[0015] According to some embodiments of the present invention, the first main delivery pipe, the first backup delivery pipe, the second main delivery pipe and the second backup delivery pipe are provided with a second ball valve, a gas leakage detection component, a second pressure monitoring component, a flow control valve and a second check valve in sequence from front to back along the gas flow direction, and the gas leakage detection component, the second pressure monitoring component and the flow control valve are all communicatively connected with the controller.

[0016] According to some embodiments of the present invention, the static mixing device includes a mixing skid, an air inlet pipe and a mixing screen, one end of the air inlet pipe is connected to the first pipeline structure, the other end of the air inlet pipe extends into the mixing skid, the mixing skid is provided with an air inlet and an air outlet, the air inlet is connected to the second pipeline structure, the mixing screen is arranged in the mixing skid and is located at the rear side of the other end of the air inlet pipe, and the proportional analyzer is located at the rear end of the mixing screen and is arranged close to the air outlet.

[0017] According to some embodiments of the present invention, the static mixing device is further provided with a second flow monitoring component, which is communicatively connected to the controller and is located at the rear end of the mixing screen and close to the air outlet.

[0018] According to some embodiments of the present invention, the gas mixing system further includes a control cabinet, the controller is disposed in the control cabinet, the control cabinet is provided with a control display panel, and the control display panel is communicatively connected with the controller. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] In order to more clearly illustrate the specific implementation methods of the present invention or the technical solutions in the prior art, the drawings required for use in the specific implementation methods or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are some implementation methods of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0020] Figure 1 A schematic diagram of the structure of a gas mixing system provided in some embodiments of the present invention;

[0021] Figure 2 It is a schematic structural diagram of a first flow control device provided in some embodiments of the present invention;

[0022] Figure 3 It is a schematic structural diagram of a second flow control device provided in some embodiments of the present invention;

[0023] Figure 4 It is a schematic diagram of the structure of a static mixing device provided in some embodiments of the present invention;

[0024] Figure 5 It is a schematic diagram of the structure of the hybrid screen provided in some embodiments of the present invention.

[0025] Description of reference numerals:

[0026] 1. Controller; 2. First flow control device; 201. First delivery pipe group; 202. First gas source interface; 203. Check valve group; 204. Monitoring component; 205. Second ball valve; 206. Gas leakage detection component; 207. Second pressure monitoring component; 208. Flow control valve; 209. Second check valve; 210. First purge interface; 211. Second purge interface; 2011. First main delivery pipe; 2012. First spare delivery pipe; 2031. First ball valve; 2032, first check valve; 2041, first flow monitoring component; 2042, first pressure monitoring component; 3, second flow control device; 301, second delivery pipe group; 302, second gas source interface; 3011, second main delivery pipe; 3012, second spare delivery pipe; 4, static mixing device; 401, mixing skid; 402, air inlet pipe; 403, mixing screen; 404, proportion analyzer; 405, second flow monitoring component; 4011, air inlet; 4012, air outlet. DETAILED DESCRIPTION

[0027] In order to make the purpose, technical solution and advantages of the embodiments of the present invention clearer, the technical solution in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative work are within the scope of protection of the present invention.

[0028] In the description of the present invention, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc., indicating the orientation or positional relationship, are based on the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as limiting the present invention. In addition, the terms "first", "second", and "third" are used for descriptive purposes only, and cannot be understood as indicating or implying relative importance.

[0029] In the description of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "installed", "connected", and "connected" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0030] In addition, the technical features involved in the different embodiments of the present invention described below can be combined with each other as long as they do not conflict with each other.

[0031] Reference Figure 1As shown, in some embodiments of the present invention, a gas blending system is provided, which is applied to the mixing of fossil fuel gas and hydrogen; it includes: a controller 1, a first flow control device 2, a second flow control device 3 and a static mixing device 4; the first flow control device 2 is communicatively connected to the controller 1, and the first flow control device 2 is provided with a first pipeline structure suitable for conveying the first gas; the second flow control device 3 is communicatively connected to the controller 1, and the second flow control device 3 is provided with a second pipeline structure suitable for conveying the second gas, the first pipeline structure and the second pipeline structure are both connected to the static mixing device 4, the first gas and the second gas are suitable for mixing in the static mixing device 4, and the static mixing device 4 is provided with a ratio analyzer 404 communicatively connected to the controller 1, the ratio analyzer 404 is suitable for detecting the mixing ratio parameters of the first gas and the second gas, and feeding back the mixing ratio parameters to the controller 1, and the controller 1 controls the first flow control device 2 and the second flow control device 3 according to the received mixing ratio parameters to control the conveying flow rates of the first gas and the second gas.

[0032] Specifically, the first flow control device 2 is provided with a first pipeline structure for conveying the first gas, and the second flow control device 3 is provided with a second pipeline structure for conveying the second gas. The first pipeline structure and the second pipeline structure are both connected to the static mixing device 4, so that the first gas and the second gas are conveyed to the static mixing device 4 for mixing. The static mixing device 4 is provided with a ratio analyzer 404 which is communicatively connected to the controller 1. The ratio analyzer 404 is suitable for detecting the mixing ratio parameters of the first gas and the second gas, and feeding back to the controller 1. The controller 1 controls the first flow control device 2 and the second flow control device 3 according to the received mixing ratio parameters to control the flow rates of the first gas and the second gas, thereby realizing the control of the mixing ratio of the first gas and the second gas in the static mixing device 4, so that the first gas and the second gas are mixed according to a preset ratio, the uniformity of the mixing is improved, sufficient combustion is ensured, the melting efficiency is improved, and carbon emissions are reduced.

[0033] Reference Figure 2 and Figure 3 As shown, in some embodiments of the present invention, the first pipeline structure includes a first gas source interface 202 and a first delivery pipe group 201, the front end of the first delivery pipe group 201 is connected to the first gas source interface 202, the rear end of the first delivery pipe group 201 is connected to the static mixing device 4, and the first delivery pipe group 201 includes a first main delivery pipe 2011 and a first spare delivery pipe 2012 arranged in parallel;

[0034] The second pipeline structure includes a second gas source interface 302 and a second delivery pipe group 301. The front end of the second delivery pipe group 301 is connected to the second gas source interface 302, and the rear end of the second delivery pipe group 301 is connected to the static mixing device 4. The second delivery pipe group 301 includes a second main delivery pipe 3011 and a second spare delivery pipe 3012 arranged in parallel.

[0035] Specifically, the first gas source interface 202 is connected to the preparation and supply equipment of the first gas, the first delivery pipe group 201 includes the first main delivery pipe 2011 and the first backup delivery pipe 2012, the second gas source interface 302 is connected to the preparation and supply equipment of the second gas, the second delivery pipe group 301 includes the second main delivery pipe 3011 and the second backup delivery pipe 3012, in normal operation, the first gas is delivered through the first main delivery pipe 2011, the first backup delivery pipe 2012 is closed, the second gas is delivered through the second main delivery pipe 3011, and the second backup delivery pipe 3012 is closed. When the first main delivery pipe 2011 and / or the second main delivery pipe 3011 need to be inspected or maintained, the first gas / second gas is delivered through the first backup delivery pipe 2012 and / or the second backup delivery pipe 3012, so as to ensure the normal delivery of the gas and improve the reliability of the system.

[0036] In some embodiments of the present invention, a monitoring component 204 is provided between the rear end of the first delivery pipe group 201 and the static mixing device 4, and between the rear end of the second delivery pipe group 301 and the static mixing device 4. The monitoring component 204 includes a first flow monitoring component 2041 and a first pressure monitoring component 2042 which are arranged in sequence at intervals. The first flow monitoring component 2041 and the first pressure monitoring component 2042 are both communicatively connected to the controller 1.

[0037] Specifically, the flow parameters of the first gas and the second gas are monitored by the first flow monitoring component 2041, and the pressure parameters of the first gas and the second gas are monitored by the first pressure monitoring component 2042. The first flow monitoring component 2041 and the second pressure monitoring component 207 are both communicated with the controller 1, and the pressure parameters and flow parameters are fed back to the controller 1. The controller 1 controls the gas flow parameters and pressure parameters on the first delivery pipe group 201 and the second delivery pipe group 301 according to the received pressure parameters and flow parameters.

[0038] In some embodiments of the present invention, a check valve group 203 is provided between the first gas source interface 202 and the first delivery pipe group 201 and between the second gas source interface 302 and the second delivery pipe group 301, and the check valve group 203 includes a first ball valve 2031 and / or a first check valve 2032.

[0039] Specifically, in order to avoid gas backflow caused by excessive gas pressure at the rear end and pollution of the gas source, a check valve group 203 needs to be set at the rear ends of the first gas source interface 202 and the second gas source interface 302 to achieve unidirectional flow of the first gas and the second gas through the check valve group 203.

[0040] In some embodiments of the present invention, a first purge interface 210 is provided between the check valve group 203 and the first delivery pipe group 201 and between the check valve group 203 and the second delivery pipe group 301, and a second purge interface 211 is provided between the monitoring component 204 and the static mixing device 4.

[0041] In order to avoid the accuracy of the mixing ratio of the first gas and the second gas and reduce the mixing of air with the first gas and the second gas, which affects the safety, before using the device, open the first delivery pipe group 201 and the second delivery pipe group 301, and introduce nitrogen into the first purge interface 210. The nitrogen flows through the first delivery pipe group 201 / the second delivery pipe group 301 and the static mixing device 4 and then flows out. The nitrogen can be connected to the second purge interface 211 to improve the purge efficiency of the air.

[0042] In some embodiments of the present invention, a plurality of first gas source interfaces 202 are provided, and the plurality of first gas source interfaces 202 are arranged in parallel.

[0043] Specifically, by providing a plurality of first gas source interfaces 202 , the reliability of the system is improved.

[0044] In some embodiments of the present invention, the first main delivery pipe 2011, the first backup delivery pipe 2012, the second main delivery pipe 3011 and the second backup delivery pipe 3012 are provided with a second ball valve 205, a gas leakage detection component 206, a second pressure monitoring component 207, a flow control valve 208 and a second check valve 209 from front to back along the gas flow direction, and the gas leakage detection component 206, the second pressure monitoring component 207 and the flow control valve 208 are all communicatively connected with the controller 1.

[0045] Specifically, the gas leakage monitoring component is used to detect the air tightness of the first delivery pipe group 201 / the second delivery pipe group 301, so as to avoid the leakage of the first gas / the second gas and the occurrence of safety accidents. The flow control valve 208 is suitable for controlling the flow of the gas. The flow control valve 208 is connected to the controller 1 in communication. The opening of the flow control valve 208 is controlled by the controller 1. The flow control valve 208 is a pneumatic valve.

[0046] Reference Figure 4As shown, in some embodiments of the present invention, the static mixing device 4 includes a mixing skid 401, an air inlet pipe 402 and a mixing screen 403, one end of the air inlet pipe 402 is connected to the first pipeline structure, and the other end of the air inlet pipe 402 extends into the mixing skid 401, and the mixing skid 401 is provided with an air inlet 4011 and an air outlet 4012, and the air inlet 4011 is connected to the second pipeline structure, the mixing screen 403 is arranged in the mixing skid 401 and is located at the rear side of the other end of the air inlet pipe 402, and the proportional analyzer 404 is located at the rear end of the mixing screen 403 and is arranged close to the air outlet 4012.

[0047] Specifically, the first delivery pipe group 201 is connected to the air inlet end of the air inlet pipe 402, the air outlet end of the air inlet pipe 402 extends into the mixing skid 401, the air inlet 4011 of the mixing skid 401 is connected to the second delivery pipe group 301, the first gas and the second gas are mixed in the mixing skid 401, the mixing screen 403 is arranged in the mixing skid 401 and located at the rear end of the air inlet pipe 402, so as to ensure the uniformity of the mixing of the first gas and the second gas, and the ratio analyzer 404 is located at the rear end of the mixing screen 403 and close to the air outlet 4012, so as to ensure that the ratio parameter of the mixed gas monitored by the ratio analyzer 404 is the ratio parameter after the mixing, thereby improving the adjustment accuracy. The ratio analyzer 404 is provided with an inlet and an outlet both connected to the mixing skid 401, the mixed gas enters through the inlet, and after the first gas content test is performed, it enters the mixing skid 401 again from the air outlet 4012, thereby avoiding gas waste and eliminating the need for gas discharge.

[0048] Reference Figure 4 and Figure 5 As shown, it can be understood that multiple mixing screens 403 can be provided, and the interval between two adjacent mixing screens 403 is 30 to 50 cm. The mixing screen 403 is a circular mesh structure formed by the horizontal and vertical intersecting arrangement, the horizontal is a sheet structure inclined downward, and the vertical is a spiral structure. Since the first gas has a low density, it is easy to occupy the upper space in the mixing skid, causing the gas to be stratified. The horizontal sheet structure inclined downward can make the upper hydrogen flow downward, and mix with the fossil fuel gas under the action of the vertical spiral structure.

[0049] In some embodiments of the present invention, the static mixing device 4 is further provided with a second flow monitoring component 405 , which is in communication with the controller 1 and is located at the rear end of the mixing screen 403 and close to the air outlet 4012 .

[0050] In some embodiments of the present invention, the gas mixing system further includes a control cabinet, the controller 1 is disposed in the control cabinet, the control cabinet is provided with a control display panel, and the control display panel is communicatively connected with the controller 1 .

[0051] Specifically, the control display panel can display the first gas / second gas leakage index, the first gas / second gas pressure, the first gas / second gas flow parameter, and the mixing ratio parameter received by the controller 1, and the valve opening of the flow control valve 208 can be adjusted arbitrarily on the control display panel, and the valve opening can be set to any value between 0 and 100%. By setting the control display panel, the convenience of operation is improved and the difficulty of operation is reduced.

[0052] Although the embodiments of the present invention have been described in conjunction with the accompanying drawings, those skilled in the art may make various modifications and variations without departing from the spirit and scope of the present invention, and such modifications and variations are all within the scope defined by the appended claims.

Claims

1. A gas blending system, used for mixing fossil fuel gas and hydrogen; characterized in that: include: Controller (1); A first flow control device (2), the first flow control device (2) being communicatively connected to the controller (1), the first flow control device (2) being provided with a first pipeline structure suitable for conveying a first gas; A second flow control device (3), the second flow control device (3) being communicatively connected to the controller (1), the second flow control device (3) being provided with a second pipeline structure suitable for conveying a second gas; A static mixing device (4), wherein the first pipeline structure and the second pipeline structure are both connected to the static mixing device (4), the first gas and the second gas are suitable for mixing in the static mixing device (4), and the static mixing device (4) is provided with a ratio analyzer (404) which is communicatively connected to the controller (1), and the ratio analyzer (404) is suitable for detecting a mixing ratio parameter of the first gas and the second gas, and feeding back the mixing ratio parameter to the controller (1), and the controller (1) controls the first flow control device (2) and the second flow control device (3) according to the received mixing ratio parameter, so as to control the delivery flow of the first gas and the second gas.

2. The gas blending system according to claim 1, characterized in that: The first pipeline structure comprises a first gas source interface (202) and a first delivery pipe group (201), the front end of the first delivery pipe group (201) is connected to the first gas source interface (202), the rear end of the first delivery pipe group (201) is connected to the static mixing device (4), and the first delivery pipe group (201) comprises a first main delivery pipe (2011) and a first standby delivery pipe (2012) which are arranged in parallel; The second pipeline structure includes a second gas source interface (302) and a second delivery pipe group (301), the front end of the second delivery pipe group (301) is connected to the second gas source interface (302), the rear end of the second delivery pipe group (301) is connected to the static mixing device (4), and the second delivery pipe group (301) includes a second main delivery pipe (3011) and a second spare delivery pipe (3012) arranged in parallel.

3. The gas blending system according to claim 2, characterized in that: A monitoring component (204) is provided between the rear end of the first conveying pipe group (201) and the static mixing device (4), and between the rear end of the second conveying pipe group (301) and the static mixing device (4). The monitoring component (204) includes a first flow monitoring component (2041) and a first pressure monitoring component (2042) which are arranged in sequence at intervals. The first flow monitoring component (2041) and the first pressure monitoring component (2042) are both communicatively connected to the controller (1).

4. The gas blending system according to claim 3, characterized in that: A check valve group (203) is provided between the first gas source interface (202) and the first delivery pipe group (201), and between the second gas source interface (302) and the second delivery pipe group (301), and the check valve group (203) includes a first ball valve (2031) and / or a first check valve (2032).

5. The gas blending system according to claim 4, characterized in that: A first purge interface (210) is provided between the check valve group (203) and the first delivery pipe group (201), and between the check valve group (203) and the second delivery pipe group (301), and a second purge interface (211) is provided between the monitoring component (204) and the static mixing device (4).

6. The gas blending system according to claim 2, characterized in that: A plurality of the first gas source interfaces (202) are provided, and the plurality of the first gas source interfaces (202) are arranged in parallel.

7. The gas blending system according to claim 2, characterized in that: The first main delivery pipe (2011), the first backup delivery pipe (2012), the second main delivery pipe (3011) and the second backup delivery pipe (3012) are provided with a second ball valve (205), a gas leakage detection component (206), a second pressure monitoring component (207), a flow control valve (208) and a second check valve (209) in sequence from front to back along the gas flow direction. The gas leakage detection component (206), the second pressure monitoring component (207) and the flow control valve (208) are all communicatively connected with the controller (1).

8. The gas blending system according to claim 1, characterized in that: The static mixing device (4) comprises a mixing skid (401), an air inlet pipe (402) and a mixing screen (403), one end of the air inlet pipe (402) is connected to the first pipeline structure, the other end of the air inlet pipe (402) extends into the mixing skid (401), the mixing skid (401) is provided with an air inlet (4011) and an air outlet (4012), the air inlet (4011) is connected to the second pipeline structure, the mixing screen (403) is arranged in the mixing skid (401) and is located at the rear side of the other end of the air inlet pipe (402), and the proportion analyzer (404) is located at the rear end of the mixing screen (403) and is arranged close to the air outlet (4012).

9. The gas blending system according to claim 8, characterized in that: The static mixing device (4) is also provided with a second flow monitoring component (405), which is in communication connection with the controller (1), and the second flow monitoring component (405) is located at the rear end of the mixing screen (403) and is arranged close to the air outlet (4012).

10. The gas blending system according to claim 1, characterized in that: It also comprises a control cabinet, wherein the controller (1) is arranged in the control cabinet, and the control cabinet is provided with a control display panel, and the control display panel is communicatively connected with the controller (1).

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