Gas mixing device and glass thermal equipment

Abstract

The invention relates to the technical field of glass preparation, and discloses a gas mixing device and glass thermal equipment. The gas mixing device is suitable for mixing fossil fuel gas and hydrogen, and comprises: a mixing skid, an air inlet pipe and a mixing grid; a first gas enters the mixing skid through a first air inlet, and a second gas enters the mixing skid through the air inlet pipe. Along the gas flow direction, the mixing grid is located at the rear end of the air inlet pipe, thereby achieving mixing of the first gas and the second gas. The first gas and the second gas flow in the mixing skid, and after being uniformly mixed by the mixing grid, they flow out from the gas outlet, thereby achieving uniform mixing. The gas mixing device achieves uniform mixing of two gas fuels with different densities and pressures, which is beneficial to ensuring the uniformity of the mixed gas, ensuring complete combustion, improving the firing efficiency of the product, and reducing the occurrence of safety accidents.

Description

Technical Field

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

[0002] The flat glass industry is a typical high-energy consumption and high-emission industry, and its carbon emissions have remained high for a long time. As a basic supporting industry for many downstream industries such as construction, decoration, automobiles, photovoltaics, and electronics, its production process consumes huge energy, and its carbon emissions account for a high proportion of the total emissions of the glass industry. It is one of the key areas of emission reduction worldwide. Energy consumption in the production process is one of the main sources of carbon emissions in the flat glass industry, accounting for more than 65%. The manufacture of flat glass requires high-temperature melting of raw materials, and goes through multiple processes such as clarification, homogenization, cooling, forming, and annealing. These processes require a large amount of energy supply. Glass melting furnaces are thermal equipment used to melt glass batch materials in glass manufacturing. They are usually fueled by coal, heavy oil, coal gas or natural gas. The energy consumption of glass melting furnaces accounts for about 95% of the total energy consumption of glass factories. Therefore, using clean energy to replace part or all of fossil energy for glass melting furnace combustion can significantly reduce carbon emissions in the glass industry.

[0003] The product of hydrogen combustion is water, and no carbon dioxide is produced. Hydrogen combustion is of great significance for reducing greenhouse gas emissions and addressing climate change. Hydrogen and other gases (such as natural gas) have different densities and molecular structures, and are prone to stratification when mixed. Uneven gas mixing can easily lead to uneven combustion and safety accidents such as hydrogen explosions. Summary of the invention

[0004] In view of this, the present invention provides a gas mixing device and glass thermal equipment to solve the problem in the prior art that different gas fuels are mixed unevenly, resulting in incomplete combustion and affecting the firing efficiency.

[0005] In order to solve the above technical problems, the technical solution of the present invention is as follows:

[0006] In a first aspect, the present invention provides a gas mixing device suitable for mixing fossil fuel gas and hydrogen, comprising: a mixing skid, an air inlet pipe and a mixing grid; the mixing skid is provided with a mixing channel, and the two ends of the mixing skid are respectively provided with a first air inlet and a first air outlet; one end of the air inlet pipe extends into the mixing channel and is connected to the mixing channel through a second air outlet; the mixing grid is arranged in the mixing channel, and along the gas flow direction, the mixing grid is located at the rear end of the air inlet pipe; the first gas flows out from the air inlet, the second gas flows through the air inlet pipe and flows out from the second air outlet, and after passing through the mixing grid, the first gas and the second gas are mixed in the mixing channel and flow out from the air outlet.

[0007] The invention has the following advantages: the first gas enters the mixing skid through the first air inlet, and the second gas enters the mixing skid through the air inlet pipe. Along the gas flow direction, the mixing grid is located at the rear end of the air inlet pipe, thereby achieving mixing of the first gas and the second gas. The first gas and the second gas flow in the mixing skid, and after being evenly mixed by the mixing grid, they flow out from the gas outlet, thereby achieving even mixing. The gas mixing device achieves even mixing of two gas fuels with different densities and pressures, which is beneficial to ensuring the evenness of the mixed gas, ensuring complete combustion, improving the firing efficiency of the product, and reducing the occurrence of safety accidents.

[0008] According to an embodiment of the first aspect of the present invention, a connecting flange is provided at the other end of the air inlet pipe, and the connecting flange can be fixedly connected to a gas source device of a second gas so as to be suitable for introducing the second gas into the air inlet pipe. The air inlet pipe has a vertical end and a horizontal section connected to each other in the mixing channel, the vertical end is penetrated through the mixing skid and is perpendicular to the axis of the mixing skid, the horizontal section is located in the middle of the mixing channel and is parallel to the axis of the mixing skid, and the second air outlet is located on the horizontal section.

[0009] According to the first aspect of the present invention, the second air outlet includes a main outlet arranged at the end of the horizontal section and / or a diffuser arranged on the side wall of the horizontal section. There are multiple diffusers and they are evenly spaced along the circumference of the horizontal section.

[0010] According to the first aspect of the present invention, the diffuser is provided with multiple circles on the horizontal section. The diffusers are spaced apart along the length direction of the horizontal section, and the diameter of the diffusers gradually increases toward the mixing grid.

[0011] According to an embodiment of the first aspect of the present invention, the intake pressure difference between the first gas and the second gas is less than or equal to 0.2 MPa, and the intake pressure of the first gas is lower than the intake pressure of the second gas.

[0012] According to a first aspect of the present invention, the mixing grid includes a rotating shaft and blades, the blades are transmission-connected to the rotating shaft, the rotating shaft is coaxially arranged with the mixing skid, and the first gas and the second gas flow in the mixing skid to drive the blades to rotate.

[0013] According to the first aspect of the present invention, the hybrid fence further comprises a driving member, the driving member is in driving connection with the rotating shaft, and the driving member drives the rotating shaft to rotate, thereby driving the blades to rotate.

[0014] According to the first aspect of the present invention, the distance between the axis of the rotating shaft and the edge of the blade is 30% to 70% of the radius of the mixing skid.

[0015] According to the first aspect of the present invention, the mixing grid is provided in plurality and is spaced apart along the length direction of the mixing skid, and the spacing between two adjacent mixing grids is 20-50 cm.

[0016] In a second aspect, the present invention further provides a glass thermal equipment used for melting glass batch materials, comprising: a melting furnace, a burner and a gas mixing device, wherein the burner is arranged in the melting furnace, the mixing skid extends to be connected to the burner, and the mixed gas enters the burner through a first outlet for combustion. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] 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.

[0018] Figure 1 It is a schematic structural diagram of a gas mixing device provided in an embodiment of the first aspect of the present invention;

[0019] Figure 2 It is a schematic diagram of the structure of the hybrid gate provided in the embodiment of the first aspect of the present invention.

[0020] Description of reference numerals:

[0021] 1. Mixing skid; 11. First air inlet; 12. First air outlet; 13. Mixing channel; 2. Air inlet pipe; 21. Vertical section; 22. Horizontal section; 23. Diffuser; 24. Main flow outlet; 25. Connecting flange; 3. Mixing grid; 31. Rotating shaft; 32. Blades. DETAILED DESCRIPTION

[0022] 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.

[0023] 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.

[0024] 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.

[0025] 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.

[0026] Reference Figure 1 As shown, in the first aspect, the present invention provides a gas mixing device, which is suitable for mixing fossil fuel gas and hydrogen, including: a mixing skid 1, an air inlet pipe 2 and a mixing grid 3; the mixing skid 1 is provided with a mixing channel 13, and the two ends of the mixing skid 1 are respectively provided with a first air inlet 11 and a first air outlet 12; one end of the air inlet pipe 2 extends into the mixing channel 13, and is connected with the mixing channel 13 through a second air outlet; the mixing grid 3 is arranged in the mixing channel 13, and along the gas flow direction, the mixing grid 3 is located at the rear end of the air inlet pipe 2; the first gas flows out from the air inlet, and the second gas flows through the air inlet pipe 2 and flows out from the second air outlet, and after the first gas and the second gas are mixed in the mixing channel 13 through the mixing grid 3, they flow out from the air outlet.

[0027] Specifically, the first gas enters the mixing skid 1 through the first air inlet 11, and the second gas enters the mixing skid 1 through the air inlet pipe 2. Along the gas flow direction, the mixing grid 3 is located at the rear end of the air inlet pipe 2, thereby achieving mixing of the first gas and the second gas. The first gas and the second gas flow in the mixing skid 1, and flow out from the air outlet after being evenly mixed by the mixing grid 3, thereby achieving uniform mixing. The gas mixing device achieves uniform mixing of two gas fuels with different densities and pressures, which is beneficial to ensuring the uniformity of the mixed gas, ensuring complete combustion, improving the firing efficiency of the product, and reducing the occurrence of safety accidents.

[0028] It is understandable that, by setting the mixing grid 3, two gases of different properties are mixed to ensure that the two gases are mixed evenly, reduce stratification, and ensure controllable combustion process. Specifically, the first gas is fossil fuel gas, and the second gas is hydrogen.

[0029] In the first aspect of the embodiment of the present invention, a connecting flange 25 is provided at the other end of the air inlet pipe 2, and the connecting flange 25 can be fixedly connected to the gas source device of the second gas to be suitable for introducing the second gas into the air inlet pipe 2. The air inlet pipe 2 has a vertical end and a horizontal section 22 connected to each other in the mixing channel 13. The vertical end is penetrated through the mixing skid 1 and is perpendicular to the axis of the mixing skid 1. The horizontal section 22 is located in the middle of the mixing channel 13 and is parallel to the axis of the mixing skid 1. The second air outlet is located on the horizontal section 22.

[0030] Specifically, by fixedly connecting the other end of the air intake pipe 2 with the gas source device of the second gas, specifically, by fixedly connecting through the connecting flange 25, the gas source device of the second gas provides the second gas to the air intake pipe 2, and the second gas flows through the air intake pipe 2 and flows out from the second gas outlet. The air intake pipe 2 has a vertical section 21 and a horizontal section 22 connected to each other in the mixing channel 13, wherein the connection between the horizontal section 22 and the vertical section 21 is an arc section to ensure the smooth flow of the second gas. The second gas outlet is located on the horizontal section 22, so that the flow directions of the first gas and the second gas are consistent.

[0031] In the first embodiment of the present invention, the second air outlet includes a main outlet 24 arranged at the end of the horizontal section 22 and / or a diffuser 23 arranged on the side wall of the horizontal section 22. There are multiple diffusers 23 and they are evenly spaced along the circumference of the horizontal section 22.

[0032] In the first embodiment of the present invention, the diffuser 23 is provided with multiple circles on the horizontal section 22. The multiple circles of diffuser 23 are arranged at intervals along the length direction of the horizontal section 22, and the diameter of the diffuser 23 gradually increases toward the mixing grid 3.

[0033] Specifically, the diffuser 23 is disposed on the side wall of the horizontal section 22 and close to one end of the main flow port 24. A plurality of diffusers 23 are provided and are evenly spaced around the circumference of the horizontal section 22. The second gas flows out through the main flow port 24 and the diffuser 23. The arrangement of the diffuser 23 is conducive to uniform mixing of the first gas and the second gas.

[0034] It can be understood that, along the length of the horizontal section 22, the diffuser 23 is provided with multiple circles, and the diameter of the multiple circles of diffuser 23 gradually increases in the direction of the mixing grid 3, thereby improving the mixing efficiency. The gradual increase in diameter makes the gas pressure of the second gas gradually decrease and the flow rate of the gas slow down as the inlet pipe 2 is closer to one end of the main flow port 24, thereby improving the mixing efficiency of the first gas and the second gas, which is beneficial to the uniformity of mixing.

[0035] In an embodiment of the first aspect of the present invention, the intake pressure difference between the first gas and the second gas is less than or equal to 0.2 MPa, and the intake pressure of the first gas is lower than the intake pressure of the second gas.

[0036] Specifically, when mixing, the pressure difference between the first gas and the second gas must be less than or equal to 0.2MPa, because too large a pressure difference will reduce the uniformity of the mixed gas, causing stratification of the gas during combustion. Specifically, when the second gas is hydrogen, due to the fast combustion speed of hydrogen, when the uniformity of the mixed gas is poor, it will cause inconsistent flame temperature and affect the combustion effect. When the intake pressure of the first gas is greater than the intake pressure of the first gas, since the second gas outlet is located in the mixing channel 13, the pressure of the first gas is high, which will prevent the second gas from flowing out of the second gas outlet, resulting in poor mixing efficiency. Therefore, the intake pressure of the first gas should be less than the intake pressure of the second gas.

[0037] It is understandable that flow valves are provided in the first air inlet 11 and the air inlet pipe 2 to control the flow of the first gas and the second gas before entering the mixing channel 13, thereby controlling the melting temperature of the melting furnace.

[0038] Reference Figure 2 As shown, in the first embodiment of the present invention, the mixing grid 3 includes a rotating shaft 31 and blades 32, the blades 32 are transmission-connected to the rotating shaft 31, the rotating shaft 31 is coaxially arranged with the mixing pry 1, and the first gas and the second gas flow in the mixing pry 1 to drive the blades 32 to rotate.

[0039] Specifically, the first gas and the second gas have an intake pressure, so the mixed gas has a larger aerodynamic force in the mixing channel 13. When the mixed gas flows in the mixing channel 13 toward the first gas outlet 12, it will drive the blades 32 to rotate, thereby further achieving mixing of the first gas and the second gas and improving the uniformity of the mixing.

[0040] In the first embodiment of the present invention, the mixing gate 3 further includes a driving member, which is in transmission connection with the rotating shaft 31 , and the driving member drives the rotating shaft 31 to rotate, thereby driving the blades 32 to rotate.

[0041] Specifically, by providing a driving member, the driving member drives the rotating shaft 31 to rotate, thereby driving the blades 32 to rotate, thereby achieving gas mixing and improving mixing efficiency. Specifically, when the mixed gas flow rate is greater than 1000 Nm 3 / h, the mixed gas drives the blades 32 to rotate freely to mix the gas. When the mixed gas flow rate is ≤1000Nm 3When the speed reaches 0.15 V, the driving member is turned on, and the rotating shaft 31 is adjusted by the speed setting to drive the blades 32 to rotate so that the gas is mixed evenly. It can be understood that the driving member is a motor.

[0042] In the first embodiment of the present invention, the distance between the axis of the rotating shaft 31 and the edge of the blade 32 is 30% to 70% of the radius of the mixing pry 1 .

[0043] Specifically, when the size of the blade 32 is too small, the gas mixing uniformity will be poor; when the size of the blade 32 is too large, it will affect the circulation of the gas, increase the resistance, and reduce the total flow of the pipeline gas, thereby resulting in poor combustion efficiency. Therefore, in some embodiments of the present invention, the distance between the axis of the rotating shaft 31 and the edge of the blade 32 is set to 30% to 70% of the radius of the mixing skid 1, which can improve the mixing efficiency while ensuring the total flow of the mixed gas.

[0044] In the first embodiment of the present invention, a plurality of mixing gates 3 are provided and are spaced apart along the length direction of the mixing skid 1 , and the distance between two adjacent mixing gates 3 is 20-50 cm.

[0045] Specifically, along the length direction of the mixing skid 1, a plurality of mixing grids 3 are arranged at intervals, thereby improving the mixing efficiency.

[0046] In the second aspect, the present invention also provides a glass thermal equipment used for melting glass batch materials, including: a melting furnace, a burner and a gas mixing device, the burner is arranged in the melting furnace, the mixing skid 1 extends to connect with the burner, and the mixed gas enters the burner through the first outlet for combustion.

[0047] Embodiment 1

[0048] The length of the mixing skid is 220 cm, the length of the horizontal section 22 of the air inlet pipe 2 is 30 cm, the diameter of the diffuser 23 increases along the gas flow direction, the number of mixing grids 3 is 5, the interval between two adjacent mixing grids 3 is 35 cm, the rotation speed of the rotating shaft 31 is 800 r / min, and the gas flow rate of the first air inlet 11 is 800 Nm 3 / h, pressure is 0.2MPa, gas flow rate at the second outlet is 200Nm 3 / h, and the pressure was 0.3 MPa. The gas mixing time was 5 min, and the gas entering the mixing channel 13 from the second gas outlet was 20 vol%, and the combustion flame did not show stratification.

[0049] Embodiment 2

[0050] The length of the mixing skid is 190 cm, the length of the horizontal section 22 of the air inlet pipe 2 is 30 cm, the diameter of the diffuser 23 increases from small to large along the gas flow direction, the number of mixing grids 3 is 4, the interval between two adjacent mixing grids 3 is 30 cm, the rotation speed of the rotating shaft 31 is 800 r / min, and the gas flow rate of the first air inlet 11 is 800 Nm 3 / h, pressure is 0.25MPa, gas flow rate of the second outlet is 200Nm 3 / h, pressure 0.3MPa. The gas mixing time is 8min, the gas entering the mixing channel 13 from the second gas outlet is 20vol%, and the combustion flame does not show stratification.

[0051] Embodiment 3

[0052] The length of the mixing skid is 220 cm, the length of the horizontal section 22 of the air inlet pipe 2 is 25 cm, the diameter of the diffuser 23 increases from small to large along the gas flow direction, the number of mixing grids 3 is 4, the interval between two adjacent mixing grids 3 is 40 cm, the rotation speed of the rotating shaft 31 is 800 r / min, and the gas flow rate of the first air inlet 11 is 900 Nm 3 / h, pressure is 0.25MPa, gas flow rate of the second outlet is 180Nm 3 / h, and the pressure was 0.2 MPa. The gas mixing time was 10 min, and the gas entering the mixing channel 13 from the second gas outlet was 16.67 vol%, and the combustion flame did not show stratification.

[0053] Comparative Example 1

[0054] The length of the mixing skid is 200 cm, the length of the horizontal section 22 of the air inlet pipe 2 is 25 cm, the diameter of the diffuser 23 increases from small to large along the gas flow direction, the number of mixing grilles 3 is 2, the interval between two adjacent mixing grilles 3 is 60 cm, the rotation speed of the rotating shaft 31 is 800 r / min, and the gas flow rate of the first air inlet 11 is 800 Nm 3 / h. The pressure is 0.2MPa and the gas flow rate of the second outlet is 200Nm 3 / h, pressure 0.3MPa. The gas mixing time is 5min, the gas entering the mixing channel 13 from the second gas outlet is 15vol%, and the combustion flame shows stratification.

[0055] Comparative Example 2

[0056] The length of the mixing skid is 220 cm, the length of the horizontal section 22 of the air inlet pipe 2 is 30 cm, the diameter of the diffuser 23 increases from small to large along the gas flow direction, the number of mixing grids 3 is 5, the interval between two adjacent mixing grids 3 is 35 cm, the rotation speed of the rotating shaft 31 is 800 r / min, and the gas flow rate of the first air inlet 11 is 800 Nm 3 / h, pressure is 0.3MPa, gas flow rate at the second outlet is 200Nm 3 / h, and the pressure is 0.05MPa. The gas mixing time is 5min, and the gas entering the mixing channel 13 from the second gas outlet is 20vol%, and the combustion flame shows stratification.

[0057] Comparative Example 3:

[0058] The length of the mixing skid is 220 cm, the length of the horizontal section 22 of the air inlet pipe 2 is 30 cm, the diameter of the diffuser 23 is set to be the same along the gas flow direction, the number of mixing grids 3 is 5, and the interval between two adjacent mixing grids 3 is 35 cm. The rotation speed of the rotating shaft 31 is 800 r / min, and the gas flow rate of the first air inlet 11 is 800 Nm 3 / h. The pressure is 0.2MPa and the gas flow rate of the second outlet is 200Nm 3 / h, pressure is 0.3MPa. The gas mixing time is 5min, the gas entering the mixing channel 13 from the second gas outlet is 20vol%, the combustion flame is not stable, and a small range of stratification occurs.

[0059] According to the combined analysis of Example 1 and Comparative Example 1, the uniformity of mixing can be improved by increasing the number of mixing gates 3 .

[0060] According to comparative example 2, it can be seen that when the pressure difference between the first gas and the second gas is greater than 0.2 MPa, the second gas cannot enter the mixing channel 13 and the mixing of the gases cannot be achieved.

[0061] According to the comparison between Examples 1 to 3 and Comparative Example 3, it can be seen that the diameter of the diffuser 23 increases along the gas flow direction, which can effectively improve the mixing efficiency.

[0062] 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 device, suitable for mixing fossil fuel gas and hydrogen, characterized in that: include: A mixing skid (1) is provided with a mixing channel (13), and two ends of the mixing skid (1) are respectively provided with a first air inlet (11) and a first air outlet (12); An air intake pipe (2), one end of the air intake pipe (2) extending into the mixing channel (13) and communicating with the mixing channel (13) via a second air outlet; A mixing grid (3) is arranged in the mixing channel (13), and along the gas flow direction, the mixing grid (3) is located at the rear end of the intake pipe (2); The first gas flows out from the gas inlet, the second gas flows through the gas inlet pipe (2) and flows out from the second gas outlet, passes through the mixing grid (3), and the first gas and the second gas are mixed in the mixing channel (13) before flowing out from the gas outlet.

2. The gas mixing device according to claim 1, characterized in that: The other end of the air inlet pipe (2) is provided with a connecting flange (25), and the connecting flange (25) can be fixedly connected to a gas source device of a second gas so as to be suitable for introducing the second gas into the air inlet pipe (2). The air inlet pipe (2) has a vertical end and a horizontal section (22) connected to each other in the mixing channel (13), the vertical end is passed through the mixing skid (1) and is perpendicular to the axis of the mixing skid (1), the horizontal section (22) is located in the middle of the mixing channel (13) and is parallel to the axis of the mixing skid (1), and the second air outlet is located on the horizontal section (22).

3. The gas mixing device according to claim 2, characterized in that: The second air outlet comprises a main outlet (24) arranged at the end of the horizontal section (22) and / or a diffusion outlet (23) arranged on the side wall of the horizontal section (22); a plurality of the diffusion outlets (23) are provided and are evenly spaced along the circumference of the horizontal section (22).

4. The gas mixing device according to claim 3, characterized in that: The diffusion opening (23) is provided with a plurality of circles on the horizontal section (22). Along the length direction of the horizontal section (22), the plurality of circles of the diffusion opening (23) are arranged at intervals, and the diameter of the diffusion opening (23) gradually increases toward the mixing grid (3).

5. The gas mixing device according to claim 1, characterized in that: The intake pressure difference between the first gas and the second gas is less than or equal to 0.2 MPa, and the intake pressure of the first gas is lower than the intake pressure of the second gas.

6. The gas mixing device according to any one of claims 1 to 5, characterized in that: The mixing grid (3) comprises a rotating shaft (31) and blades (32), wherein the blades (32) are drivingly connected to the rotating shaft (31), the rotating shaft (31) is coaxially arranged with the mixing skid (1), and the first gas and the second gas flow in the mixing skid (1) to drive the blades (32) to rotate.

7. The gas mixing device according to claim 6, characterized in that: The mixing grille (3) further comprises a driving member, the driving member being in driving connection with the rotating shaft (31), and the driving member driving the rotating shaft (31) to rotate, thereby driving the blades (32) to rotate.

8. The gas mixing device according to claim 7, characterized in that: The distance between the axis of the rotating shaft (31) and the edge of the blade (32) is 30% to 70% of the radius of the mixing pry (1).

9. The gas mixing device according to claim 6, characterized in that: The mixing grids (3) are provided in plurality and are arranged at intervals along the length direction of the mixing skid (1), and the distance between two adjacent mixing grids (3) is 20-50 cm.

10. A glass thermal equipment, used for melting glass batch, characterized in that: include: Furnace; A burner is provided in the melting furnace. The gas mixing device according to any one of claims 1 to 9, wherein the mixing skid (1) extends to connect with the burner, and the mixed gas enters the burner through the first outlet for combustion.

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