Combustion nozzle for mixing various waste gases and use method of combustion nozzle

Abstract

The invention provides a combustion nozzle for mixing various waste gases and a use method of the combustion nozzle, and belongs to the field of industrial waste gas emission. And the problem of insufficient combustion caused by non-uniform mixing of various waste gases is solved. The multi-hole nozzle comprises a nozzle shell, a multi-hole outer pipe, a multi-hole inner pipe, a fan blade pipe, a vacuum generator and a combustion air gun. An air inlet is formed in the side wall of the nozzle shell; a porous outer pipe and a porous inner pipe are arranged in the nozzle shell, the porous outer pipe is arranged on the outer side of the porous inner pipe, and the top of the porous outer pipe and the top of the porous inner pipe are both connected with the shell cover plate; a spraying opening is formed in the bottom of the nozzle shell; the nozzle shell is connected with a furnace end through a spraying opening, and a negative pressure chamber and a waste gas mixing chamber are sequentially arranged in the furnace end in the gas circulation direction. An air gun connector is arranged outside the furnace end; a fan blade pipe is arranged on the outer side of the porous inner pipe, and a plurality of inclined partition plates are arranged in the fan blade pipe in the circumferential direction at equal intervals. The waste gas mixing device is mainly used for fully mixing various waste gases.

Description

Technical Field

[0001] The present invention belongs to the technical field of industrial waste gas emission, and in particular relates to a combustion nozzle for mixing multiple waste gases and a method of using the same. Background Art

[0002] Industrial waste gas primarily originates from fuels, chemical reactions, volatilization of chemicals, and biological processes. Its composition is complex and contains harmful substances such as sulfur dioxide, nitrogen oxides, and volatile organic compounds that are harmful to the environment and human health. Direct discharge of these gases can cause severe pollution to the atmosphere, water bodies, and soil, disrupting the ecological balance and even threatening human health. Traditional waste gas treatment equipment cannot evenly mix waste gas due to the pressure and temperature differences between the various waste gases, resulting in incomplete combustion. The waste gas generated by incomplete combustion produces secondary pollutants. Low-pressure waste gas is difficult to stably deliver to the combustion system due to the lack of effective air entrainment technology, creating a treatment blind spot. Furthermore, high-temperature combustion requires excess fuel gas, which not only consumes a lot of energy but also increases nitrogen oxide production, exacerbating environmental pollution. Existing combustion nozzles often use a single-channel structure, making it impossible to achieve multi-stage mixing and pressure regulation of waste gas, making it difficult to meet the purification needs of complex industrial scenarios. Summary of the Invention

[0003] In view of this, the present invention aims to provide a combustion nozzle for mixing multiple exhaust gases and a method of using the same, so as to solve the problem of incomplete combustion caused by uneven mixing of multiple exhaust gases.

[0004] To achieve the above object, the present invention adopts the following technical solution: a combustion nozzle for mixing multiple exhaust gases, comprising a nozzle housing, a porous outer tube, a porous inner tube, a fan tube, a vacuum generator and a combustion air gun;

[0005] The side wall of the nozzle housing is provided with an air inlet;

[0006] A shell cover is provided on the top of the nozzle shell, and a porous outer tube and a porous inner tube are provided inside the nozzle shell. The porous outer tube is provided on the outside of the porous inner tube, and the tops of the porous outer tube and the porous inner tube are both connected to the shell cover;

[0007] A spray outlet is provided at the bottom of the nozzle housing;

[0008] The nozzle housing is connected to the burner head through the ejection port, and a negative pressure chamber and an exhaust gas mixing chamber are sequentially arranged in the burner head along the gas flow direction;

[0009] The negative pressure chamber includes a cylindrical cavity and a variable diameter cavity. The diameter of the cylindrical cavity is equal to the diameter of the ejection port. The top of the cylindrical cavity is connected to the ejection port, and the bottom is connected to the exhaust gas mixing chamber through the variable diameter cavity. The diameter of the variable diameter cavity gradually increases from the cylindrical cavity to the exhaust gas mixing chamber.

[0010] An air gun interface is provided on the outside of the burner;

[0011] The bottom of the porous inner tube is located on the same horizontal line as the ejection port, a fan tube is provided on the outside of the porous inner tube, and a plurality of oblique partitions are provided in the fan tube at equal intervals along the circumferential direction;

[0012] The vacuum generator and the combustion air gun penetrate the shell cover and extend into the cylindrical cavity of the negative pressure chamber through the interior of the porous inner tube.

[0013] Furthermore, a pipe port cover plate is provided on the shell cover plate, and a plurality of pipe ports are provided on the pipe port cover plate, and the vacuum generator and the combustion air gun extend into the negative pressure chamber through the corresponding pipe ports.

[0014] Furthermore, an inner tube baffle plate is provided on the outside of the porous inner tube, the fan blade tube is arranged on the outside of the inner tube baffle plate, an inner tube baffle plate adjustment rod is provided on the inner tube baffle plate, and the top of the inner tube baffle plate adjustment rod is screwed to the shell cover plate.

[0015] Furthermore, a blade tube adjusting rod is provided on the blade tube, the top of the blade tube adjusting rod is screwed to the shell cover plate, and adjusting rod protective covers are respectively provided on the top of the inner tube baffle plate adjusting rod and the blade tube adjusting rod.

[0016] Furthermore, there are four combustion air guns, and the four combustion air guns are connected to the fuel gas tank through a connecting pipe.

[0017] Furthermore, there are a plurality of air gun interfaces, and the plurality of air gun interfaces are all arranged to be tilted downward.

[0018] Furthermore, a waste acid gun is provided on the side wall of the furnace head, the waste acid gun is communicated with the interior of the furnace head, and the waste acid gun is arranged to be tilted downward.

[0019] Furthermore, a flame detector and a pilot light are provided on the burner, and both the flame detector and the pilot light are connected to the interior of the burner.

[0020] Furthermore, a condensate drain valve and a sampling hand valve are provided at the bottom of the exhaust gas mixing chamber.

[0021] A method for using a combustion nozzle for mixing multiple exhaust gases comprises the following steps:

[0022] S1: Compressed gas is introduced into the vacuum generator, and the compressed gas is ejected through the vacuum generator nozzle and enters the negative pressure chamber. At the same time, positive pressure combustion air is introduced into the air inlet. After the positive pressure combustion air is reduced in pressure by the porous outer tube, part of the positive pressure combustion air enters the porous inner tube, and the other part enters the fan blade tube, generating a rotating airflow through the oblique partition set inside the fan blade tube;

[0023] S2: Exhaust gases of different pressures are injected into the exhaust gas mixing chamber through air gun interfaces of different sizes. The low-pressure environment of the negative pressure chamber sucks the various exhaust gases entering the exhaust gas mixing chamber, while the rotating airflow generated by the fan blade tube mixes the exhaust gases in the exhaust gas mixing chamber.

[0024] S3: The exhaust gas fully combusted in the exhaust gas mixing chamber is burned at low temperature through a combustion air gun.

[0025] Compared with the prior art, the present invention has the following beneficial effects:

[0026] 1. The vacuum generator of the present invention directly extends into the negative pressure chamber, so that a stable negative pressure environment is formed in the negative pressure chamber. The negative pressure environment in the negative pressure chamber sucks the various exhaust gases in the exhaust gas mixing chamber. Even low-pressure exhaust gas can be sucked up by the negative pressure and fully mixed with other exhaust gases, thereby preventing the escape of low-pressure exhaust gas. In combination with the variable diameter cavity design, the problem of uneven mixing of exhaust gases due to pressure differences is avoided, thereby achieving mixing of various gases in the exhaust gas mixing chamber. At the same time, the combustion-supporting airflow is transformed into a rotating airflow by the oblique partition provided in the fan blade tube, thereby achieving mixing of various exhaust gases in the exhaust gas mixing chamber, further improving the mixing effect of the exhaust gases, thereby solving the problem of uneven exhaust gas mixing due to exhaust gas pressure differences in traditional nozzles, thereby affecting combustion.

[0027] 2. The present invention uses the porous structure of the porous outer tube to initially reduce the pressure of the positive-pressure combustion-supporting air entering from the air inlet. A portion of the positive-pressure combustion-supporting air passes through the fan blade tube, rotates, and flows downward, so that the exhaust gas in the exhaust gas mixing chamber is fully mixed. A portion of the positive-pressure combustion-supporting air is decelerated through the porous inner tube, and the air volume of the positive-pressure combustion-supporting air is adjusted by the cooperation of the inner tube baffle plate and the inner tube baffle plate adjustment rod, thereby adapting to different exhaust gas flow rates and combustion conditions and avoiding incomplete combustion caused by excessive or insufficient oxygen.

[0028] 3. The combustion air gun of the present invention extends into the negative pressure chamber, and the oxygen entering through the air inlet is burned at low temperature in the exhaust gas mixing chamber. The heat loss generated by low temperature combustion is low, the fuel quality utilization rate is high, and the generation of nitrogen oxides is effectively suppressed. It can achieve a comprehensive effect of high efficiency and environmental protection during the combustion process, thereby reducing secondary pollution;

[0029] 4. The present invention is equipped with multiple air gun interfaces on the furnace head and a waste acid gun on the side wall, which can realize the treatment of a variety of waste gases and waste acids, thereby improving the compatibility and operation stability of the device, and is also applicable to complex waste gas treatment scenarios. BRIEF DESCRIPTION OF THE DRAWINGS

[0030] The accompanying drawings, which constitute part of the present invention, are provided to provide a further understanding of the present invention. The exemplary embodiments of the present invention and their descriptions are provided to explain the present invention and do not constitute an undue limitation of the present invention. In the accompanying drawings:

[0031] Figure 1 This is a schematic cross-sectional structural diagram of the installation of a combustion nozzle for mixing multiple exhaust gases and a burner head according to the present invention;

[0032] Figure 2 This is a schematic diagram of the axial structure of the combustion nozzle for mixing multiple exhaust gases and the burner head installed according to the present invention;

[0033] Figure 3 This is an exploded view of a combustion nozzle for mixing multiple exhaust gases according to the present invention;

[0034] Figure 4 This is a schematic cross-sectional view of a combustion nozzle for mixing multiple exhaust gases according to the present invention;

[0035] Figure 5 This is a schematic side structural diagram of a combustion nozzle for mixing multiple exhaust gases according to the present invention;

[0036] Figure 6 This is a front structural schematic diagram of a shell of a combustion nozzle for mixing multiple exhaust gases according to the present invention;

[0037] Figure 7 This is a schematic cross-sectional view of the outer shell of a combustion nozzle for mixing multiple exhaust gases according to the present invention;

[0038] Figure 8 This is a schematic side structural diagram of a shell of a combustion nozzle for mixing multiple exhaust gases according to the present invention;

[0039] Figure 9 This is a schematic diagram of the axial structure of a fan blade tube of a combustion nozzle for mixing multiple exhaust gases according to the present invention;

[0040] Figure 10 This is a front structural schematic diagram of a fan blade tube of a combustion nozzle for mixing multiple exhaust gases according to the present invention;

[0041] Figure 11 This is a schematic diagram of the top structure of a fan blade tube of a combustion nozzle for mixing multiple exhaust gases according to the present invention;

[0042] Figure 12 This is a partial front structural schematic diagram of a combustion nozzle for mixing multiple exhaust gases according to the present invention;

[0043] Figure 13This is a schematic structural diagram of a partial side view of a combustion nozzle for mixing multiple exhaust gases according to the present invention;

[0044] Figure 14 This is a partial cross-sectional structural schematic diagram of a combustion nozzle for mixing multiple exhaust gases according to the present invention.

[0045] In the picture:

[0046] 1. Nozzle housing; 2. Air inlet; 3. Spout; 4. Multi-porous outer tube; 5. Multi-porous inner tube; 6. Inner tube baffle plate; 7. Inner tube baffle plate adjustment rod; 8. Blade tube; 9. Blade tube adjustment rod; 10. Housing cover; 11. Pipe connection cover; 12. Adjustment rod protection cover; 13. Vacuum generator; 14. Combustion gas pipe; 15. Burner head; 16. Waste gas mixing chamber; 17. Air gun interface; 18. Pipe connection; 19. Fuel gas collection chamber; 20. Flame detector; 21. Waste acid gun; 22. Ever-burning lamp. DETAILED DESCRIPTION

[0047] The following will be combined with the accompanying drawings in the embodiments of the present invention to clearly and completely explain the technical solutions in the embodiments of the present invention. It should be noted that the embodiments of the present invention and the features therein can be combined with each other in the absence of conflict, and the embodiments described are only part of the embodiments of the present invention, not all of the embodiments.

[0048] Specific implementation method: see Figure 1-14 To illustrate this embodiment, a combustion nozzle for mixing multiple exhaust gases includes a nozzle housing 1, a porous outer tube 4, a porous inner tube 5, a fan tube 8, a vacuum generator 13, and a combustion air gun 14;

[0049] The side wall of the nozzle housing 1 is provided with an air inlet 2, and the air inlet 2 is used to introduce positive pressure combustion air into the nozzle housing 1;

[0050] A shell cover 10 is provided on the top of the nozzle shell 1. A porous outer tube 4 and a porous inner tube 5 are provided inside the nozzle shell 1. The porous outer tube 4 is provided on the outside of the porous inner tube 5. The porous outer shell 4 is used to reduce the pressure of the positive-pressure combustion-supporting air. The porous inner tube 5 is used to introduce a portion of the positive-pressure combustion-supporting air into the exhaust gas mixing chamber 16. The tops of the porous outer tube 4 and the porous inner tube 5 are both connected to the shell cover 10. The shell cover 10 is used to close the top of the nozzle shell 1 and to fix the porous outer tube 4 and the porous inner tube 5.

[0051] The nozzle housing 1 is provided with a nozzle outlet 3 at the bottom thereof, and the nozzle outlet 3 is used to introduce the gas inside the nozzle housing 1 into the burner head 15;

[0052] The nozzle housing 1 is connected to the burner head 15 through the ejection port 3. The burner head 15 is made of high-temperature resistant and corrosion-resistant materials, so that the exhaust gas can be fully mixed and burned in the exhaust gas mixing chamber 16 inside the burner head 15. The negative pressure chamber 23 and the exhaust gas mixing chamber 16 are sequentially arranged in the burner head 15 along the gas flow direction.

[0053] The negative pressure chamber 23 includes a cylindrical cavity and a variable diameter cavity. The diameter of the cylindrical cavity is equal to the diameter of the ejection port 3. The top of the cylindrical cavity is connected to the ejection port 3, and the bottom is connected to the exhaust gas mixing chamber 16 through the variable diameter cavity. Negative pressure is achieved in the cylindrical cavity, which can suck the exhaust gas in the exhaust gas mixing chamber 16 to achieve mixing. Low-pressure exhaust gas can also be sucked by the negative pressure chamber 23, thereby preventing low-pressure exhaust gas from escaping. The diameter of the variable diameter cavity gradually expands from the cylindrical cavity to the exhaust gas mixing chamber 16, forming a tapered structure.

[0054] The vacuum generator 13 and the combustion gas gun 14 penetrate the shell cover 10 and extend into the cylindrical cavity of the negative pressure chamber 23 through the interior of the porous inner tube 5. The vacuum generator 13 sprays compressed gas into the cylindrical cavity of the negative pressure chamber 23, so that a negative pressure area is formed in the cylindrical cavity. The diameter of the variable diameter cavity gradually expands, thereby gradually restoring the negative pressure to a positive pressure. Although the pressure in the variable diameter cavity can be restored, the expansion structure of the variable diameter cavity still transmits the negative pressure effect of the cylindrical cavity to the inlet of the exhaust gas mixing chamber 16, maintaining continuous suction of the exhaust gas in the mixing chamber, thereby achieving exhaust gas intake suction in the exhaust gas mixing chamber 16;

[0055] The burner head 15 is provided with an air gun interface 17 on the outside, through which exhaust gases of different sources or pressures are introduced into the burner head 15 and mixed and burned in the exhaust gas mixing chamber 16;

[0056] The bottom of the porous inner tube 5 is located on the same horizontal line as the ejection port 3, ensuring that the positive-pressure combustion-supporting air directly enters the burner head 15. A fan blade tube 8 is provided on the outside of the porous inner tube 5. A plurality of oblique partitions are arranged at equal intervals along the circumferential direction in the fan blade tube 8. After the positive-pressure combustion-supporting air passes through the oblique partition, it is forced to turn, thereby generating a vortex. The positive-pressure combustion-supporting air generating the vortex mixes the exhaust gas in the exhaust gas mixing chamber 16.

[0057] Working principle of the present invention:

[0058] The compressed gas enters the cylindrical cavity of the negative pressure chamber 23 through the vacuum generator 13, forming a negative pressure in the cylindrical cavity. At the same time, the positive pressure combustion-supporting air enters the nozzle housing 1 from the air inlet 2, and is decompressed through the porous outer tube 4. Part of the positive pressure combustion-supporting air after decompression enters the porous inner tube 5 to provide oxygen for subsequent combustion, and part enters the fan tube 8, and is converted into a rotating airflow through the oblique partition in the fan tube 8. The exhaust gas is then introduced into the exhaust gas mixing chamber 16 through the air gun interface 17. The negative pressure environment in the negative pressure chamber 23 sucks the gas in the exhaust gas mixing chamber 16, thereby mixing the gas in the exhaust gas mixing chamber 16. The rotating airflow stirs the gas in the exhaust gas mixing chamber 16, so that the gas in the exhaust gas mixing chamber 16 is further mixed, thereby solving the problem of uneven exhaust gas mixing in the existing nozzle affecting subsequent combustion.

[0059] A pipe port cover 11 is provided on the shell cover 10, and a plurality of pipe ports are provided on the pipe port cover 11. The vacuum generator 13 and the combustion air gun 14 extend into the negative pressure chamber 23 through the corresponding pipe ports. The pipe ports are used to provide installation interfaces for the vacuum generator 13 and the combustion air gun 14. The combustion air gun 14 is used to provide the fuel required for combustion into the exhaust gas mixing chamber 16.

[0060] An inner tube baffle plate 6 is also provided on the outside of the porous inner tube 5, and the fan blade tube 8 is arranged on the outside of the inner tube baffle plate 6. An inner tube baffle plate adjusting rod 7 is provided on the inner tube baffle plate 6, and the top of the inner tube baffle plate adjusting rod 7 is screwed to the shell cover 10. By adjusting the inner tube baffle plate adjusting rod 7 up and down, the opening area of the inner tube baffle plate 6 covering the porous inner tube 5 is changed, thereby changing the gas flow entering the porous inner tube 5.

[0061] A blade tube adjusting rod 9 is provided on the blade tube 8, and the top of the blade tube adjusting rod 9 is screwed to the shell cover 10. By rotating the adjusting rod 9, the blade tube 8 is driven to move up and down along the axial direction, and the relative position of the blade tube 8 and the porous inner tube 5 and the inner tube baffle plate 6 is changed. When the blade tube 8 moves up, the cyclone intensity generated is small, and when the blade tube 8 moves down, the cyclone intensity generated is large. Adjustment rod protective covers 12 are respectively provided on the tops of the inner tube baffle plate adjusting rod 7 and the blade tube adjusting rod 9 to prevent external foreign matter from entering the threaded connection between the inner tube baffle plate adjusting rod 7 and the blade tube adjusting rod 9 and the shell cover 10, thereby avoiding thread jamming or corrosion and ensuring the reliability of the adjustment function.

[0062] There are four combustion air guns 14, and the four combustion air guns 14 are connected to the fuel gas tank 19 through a connecting pipe 18. Each combustion air gun 14 is connected to the fuel gas tank 19 through an independent connecting pipe 18 to form a branch fuel delivery channel. The fuel gas tank 19 is used to store multiple fuels. The four fuel air guns 14 respectively inject different types of fuels into the exhaust gas mixing chamber 16 to adapt to the combustion requirements of complex component exhaust gas.

[0063] There are several air gun interfaces 17, and the several air gun interfaces 17 are all set to be tilted downward. Exhaust gases of different pressures are decompressed through air gun interfaces 17 of different sizes and enter the exhaust gas mixing chamber 16. The air gun interfaces 17 set to be tilted downward prevent liquid or particulate matter from being retained.

[0064] A waste acid gun 21 is provided on the side wall of the burner head 15. The waste acid gun 21 is connected to the interior of the burner head 15 and is tilted downward. External acidic waste gas or waste liquid is introduced into the waste gas mixing chamber 16 inside the burner head 15 through the waste acid gun 21 to participate in mixed combustion. The downward tilted structure avoids the accumulation of acidic substances in the pipeline and reduces the risk of crystallization or corrosion.

[0065] A flame detector 20 and a permanent lamp 22 are provided on the burner head. Both the flame detector 20 and the permanent lamp 22 are connected to the interior of the burner head 15. The flame detector 20 is used to monitor the internal combustion state of the burner head 15 in real time. The permanent lamp 22 is used to provide a stable ignition source to ensure that the main combustion flame can be immediately reignited when it is accidentally extinguished to maintain combustion continuity.

[0066] A condensate drain valve and a sampling hand valve are provided at the bottom of the exhaust gas mixing chamber 16. The condensate drain valve is used to regularly discharge condensed liquid or unburned particulate matter deposited in the mixing chamber to prevent the accumulated liquid from corroding the equipment or blocking the air flow channel. The sampling hand valve is used to extract gas samples from the inside of the mixing chamber for laboratory testing and analysis of the post-combustion gas composition.

[0067] A method for using a combustion nozzle for mixing multiple exhaust gases comprises the following steps:

[0068] S1: The compressed gas is introduced into the vacuum generator 13, and the compressed gas is ejected through the nozzle of the vacuum generator 13 and enters the cylindrical cavity of the negative pressure chamber 23. According to the Bernoulli principle, a negative pressure area is formed in the cylindrical cavity. The negative pressure area in the cylindrical cavity can suck the gas in the exhaust gas mixing chamber 16. The diameter of the variable diameter cavity gradually expands, thereby gradually restoring the negative pressure to positive pressure. Although the pressure in the variable diameter cavity can be restored, the expansion structure of the variable diameter cavity still transmits the negative pressure effect of the cylindrical cavity to the inlet of the exhaust gas mixing chamber 16, maintaining the continuous suction of the gas in the exhaust gas mixing chamber 16, and at the same time, positive pressure combustion air is introduced into the air inlet 2. The positive pressure After the combustion-supporting air is decompressed by the porous outer tube 4, a part of the positive-pressure combustion-supporting air enters the porous inner tube 5, and the other part of the positive-pressure combustion-supporting air enters the fan blade tube 8. A rotating airflow is generated by the oblique partition arranged inside the fan blade tube 8. The rotating airflow can stir the exhaust gas in the exhaust gas mixing chamber 16, so that the exhaust gas is further mixed. The compressed gas is introduced through the vacuum generator 13 to form a negative pressure area to suck the gas in the exhaust gas mixing chamber. The synergistic effect of the rotating airflow formed by the fan blade tube 8 is to fully mix the exhaust gas in the exhaust gas mixing chamber 16, which is convenient for subsequent low-temperature combustion and avoids the problem of uneven exhaust gas mixing affecting the combustion effect.

[0069] S2: Exhaust gases of different pressures are injected into the exhaust gas mixing chamber 16 through air gun interfaces 17 of different sizes, and waste acid is injected into the exhaust gas mixing chamber 16 through the waste acid gun 21. The negative pressure environment of the negative pressure chamber 23 sucks the various exhaust gases entering the exhaust gas mixing chamber 16. At the same time, the rotating airflow generated by the fan tube 8 mixes the exhaust gas in the exhaust gas mixing chamber 16. The positive pressure combustion-supporting gas entering the porous inner tube 5 is changed by adjusting the inner tube baffle adjustment rod 7. The intensity of the rotating airflow is adjusted by adjusting the fan tube adjustment rod 9, so that the exhaust gases in the exhaust gas mixing chamber 16 can be fully mixed.

[0070] S3: The combustion air gun 14 obtains fuel from the fuel gas tank 19 through the connecting pipe 18, injects the fuel into the exhaust gas mixing chamber 16, and starts the eternal lamp 22 to provide a basic fire source, thereby performing low-temperature combustion on the exhaust gas that is fully burned in the exhaust gas mixing chamber 16. Low-temperature combustion can reduce the component content of nitrogen oxides, thereby reducing pollution to the environment.

[0071] The specific embodiments of the present invention disclosed above are intended only to help illustrate the present invention. The specific embodiments do not describe all details in detail, nor do they limit the invention to the specific embodiments described. Numerous modifications and variations are possible based on the contents of this specification. These embodiments are selected and described in detail in this specification to better explain the principles and practical applications of the present invention, thereby enabling those skilled in the art to better understand and utilize the present invention.

Claims

1. A combustion nozzle for mixing multiple exhaust gases, characterized by: It comprises a nozzle housing (1), a porous outer tube (4), a porous inner tube (5), a fan tube (8), a vacuum generator (13) and a combustion air gun (14); The side wall of the nozzle housing (1) is provided with an air inlet (2); A housing cover plate (10) is provided on the top of the nozzle housing (1); a porous outer tube (4) and a porous inner tube (5) are provided inside the nozzle housing (1); the porous outer tube (4) is provided outside the porous inner tube (5); and the tops of the porous outer tube (4) and the porous inner tube (5) are both connected to the housing cover plate (10); A spray outlet (3) is provided at the bottom of the nozzle housing (1); The nozzle housing (1) is connected to the burner head (15) via the ejection port (3), and a negative pressure chamber (23) and an exhaust gas mixing chamber (16) are sequentially arranged in the burner head (15) along the gas flow direction; The negative pressure chamber (23) includes a cylindrical cavity and a variable diameter cavity, the diameter of the cylindrical cavity is equal to the diameter of the ejection port (3), the top of the cylindrical cavity is connected to the ejection port (3), and the bottom is connected to the exhaust gas mixing chamber (16) through the variable diameter cavity, and the diameter of the variable diameter cavity gradually increases from the cylindrical cavity to the exhaust gas mixing chamber (16); The vacuum generator (13) and the combustion air gun (14) penetrate the housing cover (10) and extend through the interior of the porous inner tube (5) into the cylindrical cavity of the negative pressure chamber (23); An air gun interface (17) is provided on the outside of the furnace head (15); The bottom of the porous inner tube (5) and the ejection port (3) are located on the same horizontal line. A fan tube (8) is provided on the outside of the porous inner tube (5). A plurality of oblique partitions are provided in the fan tube (8) at equal intervals along the circumferential direction.

2. A combustion nozzle for mixing multiple exhaust gases according to claim 1, characterized in that: A pipe port cover plate (11) is provided on the shell cover plate (10), and a plurality of pipe ports are provided on the pipe port cover plate (11). The vacuum generator (13) and the combustion air gun (14) extend into the negative pressure chamber (23) through the corresponding pipe ports.

3. The combustion nozzle for mixing multiple exhaust gases according to claim 1, characterized in that: An inner tube orifice plate (6) is further provided on the outer side of the porous inner tube (5), the fan blade tube (8) is arranged on the outer side of the inner tube orifice plate (6), an inner tube orifice plate adjusting rod (7) is provided on the inner tube orifice plate (6), and the top of the inner tube orifice plate adjusting rod (7) is screwed to the shell cover (10).

4. A combustion nozzle for mixing multiple exhaust gases according to claim 3, characterized in that: A blade tube regulating rod (9) is provided on the blade tube (8), the top of the blade tube regulating rod (9) is screwed to the shell cover (10), and regulating rod protective covers (12) are respectively provided on the tops of the inner tube baffle plate regulating rod (7) and the blade tube regulating rod (9).

5. The combustion nozzle for mixing multiple exhaust gases according to claim 1, characterized in that: There are four combustion air guns (14), and the four combustion air guns (14) are connected to the fuel gas bin (19) through a connecting pipe (18).

6. The combustion nozzle for mixing multiple exhaust gases according to claim 1, characterized in that: There are a plurality of air gun interfaces (17), and the plurality of air gun interfaces (17) are all arranged to be tilted downward.

7. The combustion nozzle for mixing multiple exhaust gases according to claim 1, characterized in that: A waste acid gun (21) is provided on the side wall of the furnace head (15), the waste acid gun (21) is communicated with the interior of the furnace head (15), and the waste acid gun (21) is arranged to be tilted downward.

8. The combustion nozzle for mixing multiple exhaust gases according to claim 1, characterized in that: A flame detector (20) and a continuous lamp (22) are provided on the burner head, and both the flame detector (20) and the continuous lamp (22) are communicated with the interior of the burner head (15).

9. The combustion nozzle for mixing multiple exhaust gases according to claim 1, characterized in that: A condensate drain valve and a sampling hand valve are provided at the bottom of the exhaust gas mixing chamber (16).

10. A method for using the combustion nozzle for mixing multiple exhaust gases according to claim 1, characterized in that: The following steps are involved: S1: Compressed gas is introduced into the vacuum generator (13), and the compressed gas is ejected through the nozzle of the vacuum generator (13) and enters the negative pressure chamber (23). At the same time, positive pressure combustion-supporting air is introduced into the air inlet (2). After the positive pressure combustion-supporting air passes through the porous outer tube (4) and is decompressed, a portion of the positive pressure combustion-supporting air enters the porous inner tube (5), and the other portion of the positive pressure combustion-supporting air enters the fan blade tube (8), and a rotating airflow is generated through the oblique partition provided inside the fan blade tube (8); S2: Exhaust gases of different pressures are injected into the exhaust gas mixing chamber (16) through air gun interfaces (17) of different sizes. The low-pressure environment of the negative pressure chamber (23) sucks the various exhaust gases entering the exhaust gas mixing chamber (16). At the same time, the rotating airflow generated by the fan tube (8) mixes the exhaust gases in the exhaust gas mixing chamber (16); S3: The exhaust gas fully combusted in the exhaust gas mixing chamber (16) is subjected to low-temperature combustion through the combustion air gun (14).

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