A multi-nozzle exhaust gas burner

Abstract

This utility model relates to a multi-nozzle exhaust gas burner, including a bottom burner with a first flame injection end and a guide wall. One end of the guide wall is arranged around the first flame injection end, and the guide wall is funnel-shaped. An exhaust gas inlet is provided on the guide wall. A side-mounted burner group is arranged on the outer side of the guide wall, comprising multiple side-mounted burners, each with a second flame injection end. These multiple second flame injection ends are fixedly installed on the guide wall and are evenly spaced along the circumference of the guide wall. With this design, the bottom burner and the evenly distributed side-mounted burners work together to form a radial diffusion flame, expanding the high-temperature zone of the flame, increasing the contact area and mixing efficiency between the exhaust gas and the flame, thereby achieving complete combustion of the exhaust gas and improving thermal energy utilization.

Description

Technical Field

[0001] This utility model relates to the field of exhaust gas burner technology, and in particular to a multi-nozzle exhaust gas burner. Background Technology

[0002] In industrial production processes, especially in industries such as chemical, petroleum, metallurgy, coating, and pharmaceuticals, large quantities of waste gases containing volatile organic compounds (VOCs) or other combustible components are often generated. If these waste gases are directly released into the atmosphere without effective treatment, they will cause serious harm to the environment and human health. Therefore, using combustion methods to treat waste gases and achieve efficient removal of pollutants has become one of the mainstream technical means.

[0003] As a key component of waste gas incineration systems, the burner's structural design directly impacts combustion efficiency, pollutant removal rate, and operational stability. Referring to Chinese invention patent application number 202411413629.9, which is the applicant's prior patent application, a method is employed to directly introduce waste gas into the burner flame, allowing the waste gas to directly contact and burn with the outer flame, thus improving combustion efficiency and reducing energy consumption and treatment costs. However, this method uses a single-nozzle structure. While simple, this structure is prone to incomplete combustion, uneven flame distribution, and low thermal efficiency when treating large flow rates or complex waste gases, affecting the waste gas treatment effect and potentially increasing the generation of harmful emissions. Furthermore, due to the concentrated flame, the combustion range of the waste gas is limited, making it difficult to adapt to different operating conditions and resulting in poor flexibility. Utility Model Content

[0004] The technical problem to be solved by this utility model is to provide a multi-nozzle exhaust gas burner that can form a radial diffusion flame by working in coordination with the bottom burner and the circumferentially evenly distributed side burners, thereby expanding the range of the high-temperature zone of the flame, increasing the contact area and mixing efficiency between the exhaust gas and the flame, and thus achieving complete combustion of the exhaust gas and improving the thermal energy utilization rate.

[0005] To solve the above-mentioned technical problems, the technical solution provided by this utility model is as follows:

[0006] A multi-nozzle exhaust gas burner includes a bottom burner with a first flame injection end and a guide wall. One end of the guide wall is arranged around the first flame injection end. The guide wall is funnel-shaped and has an exhaust gas inlet. A side burner assembly, comprising multiple side burners, is arranged outside the guide wall. Each side burner has a second flame injection end, which is fixedly mounted on the guide wall and evenly spaced along the circumference of the guide wall. Both the bottom burner and the side burners have air inlets, through which air and fuel gas are introduced. The fuel gas is ignited at the flame injection end to form a flame. Exhaust gas enters the combustion zone through the exhaust gas inlet on the guide wall and flows in from behind the flame, where it is instantly combusted upon passing through the high-temperature outer flame.

[0007] This multi-nozzle exhaust gas burner utilizes multiple side-mounted burners arranged on the outer side of the guide wall to form a multi-nozzle synergistic combustion structure, offering significant advantages over traditional single-nozzle burners. First, the multiple second flame injection ends are evenly distributed circumferentially along the funnel-shaped guide wall, causing the flame to spread radially. This not only expands the combustion coverage but also increases the contact area between the exhaust gas and the flame, ensuring complete combustion and reducing the emission of unburned pollutants. Second, the circumferentially evenly distributed flames create a stable and wider high-temperature combustion zone, avoiding localized overheating or uneven combustion and improving thermal efficiency. Furthermore, the exhaust gas inlets on the guide wall, in conjunction with the multi-nozzle flames, ensure thorough mixing of the exhaust gas with flames from multiple directions, further enhancing the combustion effect. This structure is particularly suitable for treating large-flow or complex-composition exhaust gases, improving combustion efficiency while enhancing the reliability and adaptability of the equipment.

[0008] Preferably, the second flame jet end and the guide wall have the same inclination angle and are arranged parallel to each other. This ensures that the flames ejected from the multiple side-mounted burners have a uniform injection direction and angle, avoiding flame interference or uneven localized combustion caused by chaotic injection directions. Furthermore, this structure aligns the flame injection direction with the extension direction of the guide wall, facilitating sufficient contact between the exhaust gas entering through the exhaust inlet and the high-temperature flames ejected from the multiple flame jet ends, extending the residence time of the exhaust gas in the high-temperature combustion zone, and improving exhaust gas treatment efficiency.

[0009] Preferably, the side-mounted burner group is provided in at least one set, with each set of side-mounted burner groups spaced apart axially along the guide wall. Specifically, one or more sets of side-mounted burner groups can be provided. By setting multiple sets of side-mounted burner groups at different axial positions on the guide wall, layered management of the combustion zone can be achieved. Burners at different heights (or axial positions) can be independently started, stopped, or adjusted according to parameters such as exhaust gas flow rate and calorific value, thereby achieving more precise combustion control. Moreover, the axial superposition of multiple sets of burners significantly extends the effective combustion path, allowing large-flow exhaust gas to obtain sufficient residence time, which is particularly suitable for stable operation under high-load conditions.

[0010] Preferably, the angle between the extension direction of the guide wall and its central axis is 15°-45°. Setting the guide wall as a funnel-shaped structure with a certain tilt angle helps guide the flames ejected from multiple flame jets to diffuse orderly along the guide wall direction, avoiding direct flame collisions or turbulent flow, thereby improving the uniformity of airflow organization within the combustion chamber. It should be noted that if the angle is too large, the flame jet direction deviates significantly from the central axis, potentially causing the flame to leave the main combustion zone, or even leading to combustion instability and reduced exhaust gas treatment efficiency; if the angle is too small, the guide wall tends to narrow, easily causing obstructed exhaust gas flow and uneven residence time, affecting the exhaust gas combustion effect. Therefore, after comprehensive consideration, in this application, the preferred angle between the extension direction of the guide wall and its central axis is 15°-45°.

[0011] Preferably, multiple exhaust gas inlets are provided. This design effectively improves the uniformity and flow of exhaust gas into the burner, enhancing combustion efficiency and stability. Simultaneously, the multiple exhaust gas inlets design also reduces airflow resistance and energy consumption.

[0012] Preferably, a flame deflector is provided at the open end of the guide wall. Specifically, the flame deflector is installed inside the guide wall and located at the end furthest from the flame jet end. In this way, the flame deflector can partially block the outer flame, especially when the flame is large, thereby allowing the exhaust gas to make full contact with the outer flame.

[0013] Preferably, the guide wall is made of a high-temperature resistant alloy material. This significantly improves the overall high-temperature resistance and structural strength of the burner, extending the service life of the equipment.

[0014] In summary, this type of multi-nozzle exhaust gas burner can form a radial diffusion flame by working in conjunction with the bottom burner and the circumferentially evenly distributed side burners. This expands the range of the high-temperature zone of the flame, increases the contact area and mixing efficiency between the exhaust gas and the flame, thereby achieving complete combustion of the exhaust gas and improving the thermal energy utilization rate. Attached Figure Description

[0015] The present invention will be further described below with reference to the accompanying drawings and specific embodiments:

[0016] Figure 1 This is a schematic diagram of the structure of the multi-nozzle exhaust gas burner described in this utility model. Figure 1 ;

[0017] Figure 2 This is a schematic diagram of the structure of the multi-nozzle exhaust gas burner described in this utility model. Figure 2 ;

[0018] Figure 3 This is a schematic diagram of the structure of the multi-nozzle exhaust gas burner described in this utility model. Figure 3 ;

[0019] in:

[0020] 1-Bottom burner; 11-First flame injection end;

[0021] 2-Guide wall;

[0022] 3-Exhaust gas inlet;

[0023] 4-Side-mounted burner; 41-Second flame injection end;

[0024] 5-Flame deflector;

[0025] 6-Outer flame. Detailed Implementation

[0026] To make the objectives, technical solutions, and advantages of this utility model clearer, the present utility model will be further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the present utility model and are not intended to limit the present utility model.

[0027] In the description of this utility model, it should be understood that the orientation and positional relationship indicated by terms such as "up", "down", "left", "right", "front", "back", "vertical", "bottom", "inner", and "outer" are based on the orientation or positional relationship shown in the accompanying drawings and are only for the convenience of describing this utility model and simplifying the description. They are not intended to indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this utility model.

[0028] Reference Figures 1-3As shown, a multi-nozzle exhaust gas burner includes a bottom burner 1 with a first flame injection end 11. It also includes a guide wall 2, one end of which is arranged around the first flame injection end 11. The guide wall 2 is funnel-shaped and has an exhaust gas inlet 3. A side-mounted burner assembly is arranged outside the guide wall 2, comprising multiple side-mounted burners 4. Each side-mounted burner 4 has a second flame injection end 41, which is fixedly mounted on the guide wall 2 and evenly spaced along the circumference of the guide wall 2. Both the bottom burner 1 and the side-mounted burners 4 have air inlets, through which air and fuel gas are introduced. The fuel gas is ignited at the flame injection end to form a combustion flame. The exhaust gas enters the combustion zone through the exhaust gas inlet 3 on the guide wall 2 and flows in from the rear of the flame, where it is instantly combusted upon passing through the high-temperature outer flame 6.

[0029] This application's multi-nozzle exhaust gas burner, by arranging multiple side-mounted burners 4 on the outer side of the guide wall 2, forms a multi-nozzle synergistic combustion structure, which has significant advantages over traditional single-nozzle burners. First, multiple second flame injection ends 41 are evenly distributed circumferentially along the funnel-shaped guide wall 2, causing the flame to spread radially. This not only expands the combustion coverage area but also increases the contact area between the exhaust gas and the flame, ensuring complete combustion and reducing the emission of unburned pollutants. Second, the circumferentially evenly distributed flame can form a stable and wider high-temperature combustion zone, avoiding local overheating or uneven combustion, and improving thermal efficiency. Furthermore, the exhaust gas inlet 3 on the guide wall 2, in conjunction with the multi-nozzle flame, ensures thorough mixing of the exhaust gas with flames from multiple directions, further enhancing the combustion effect. This structure is particularly suitable for treating large-flow or complex-composition exhaust gases, improving combustion efficiency while enhancing the reliability and adaptability of the equipment.

[0030] Additionally, refer to Figure 3 As shown, the second flame injection end 41 and the guide wall 2 have the same inclination angle and are arranged parallel to each other. By maintaining the same inclination angle and parallelism between the second flame injection end 41 and the guide wall 2, it ensures that the flames ejected from the multiple side-mounted burners 4 have a uniform injection direction and angle, avoiding flame interference or uneven local combustion caused by chaotic injection directions. Furthermore, this structure aligns the flame injection direction with the extension direction of the guide wall 2, facilitating sufficient contact between the exhaust gas entering from the exhaust gas inlet 3 and the high-temperature flames ejected from the multiple flame injection ends, extending the residence time of the exhaust gas in the high-temperature combustion zone, and improving exhaust gas treatment efficiency.

[0031] Additionally, at least one set of side-mounted burners is provided, with each set spaced axially along the guide wall 2. Specifically, one or more sets of side-mounted burners can be provided. By setting multiple sets of side-mounted burners at different axial positions on the guide wall 2, layered management of the combustion zone can be achieved. Burners at different heights (or axial positions) can be independently started, stopped, or adjusted according to parameters such as exhaust gas flow rate and calorific value, thereby achieving more precise combustion control. Moreover, the axial stacking of multiple sets of burners significantly extends the effective combustion path, allowing large-flow exhaust gas to obtain sufficient residence time, which is particularly suitable for stable operation under high-load conditions.

[0032] Furthermore, the angle between the extension direction of the guide wall 2 and its central axis is 15°-45°. Setting the guide wall 2 as a funnel-shaped structure with a certain angle of inclination helps guide the flames ejected from multiple flame jets to diffuse orderly along the direction of the guide wall 2, avoiding direct flame collisions or turbulent flow, thereby improving the uniformity of airflow organization within the combustion chamber. It should be noted that if the angle is too large, the flame jet direction deviates significantly from the central axis, potentially causing the flame to leave the main combustion zone, or even leading to combustion instability and reduced exhaust gas treatment efficiency; if the angle is too small, the guide wall 2 tends to narrow, easily causing obstructed exhaust gas flow and uneven residence time, affecting the exhaust gas combustion effect. Therefore, after comprehensive consideration, in this application, the preferred angle between the extension direction of the guide wall 2 and its central axis is 15°-45°.

[0033] Additionally, refer to Figure 2 As shown, multiple exhaust gas inlets 3 are provided. This design effectively improves the uniformity and flow of exhaust gas entering the burner, enhancing combustion efficiency and stability. Simultaneously, the multiple exhaust gas inlets 3 also reduce airflow resistance and energy consumption.

[0034] Additionally, refer to Figure 1 As shown, a flame deflector 5 is provided at the open end of the guide wall 2. Specifically, the flame deflector 5 is installed inside the guide wall 2 and located at the end furthest from the flame jet end. In this way, the flame deflector 5 can partially block the outer flame 6, especially when the flame is large, thereby allowing the exhaust gas to fully contact the outer flame 6.

[0035] Furthermore, the guide wall 2 is made of a high-temperature resistant alloy material. This significantly improves the overall high-temperature resistance and structural strength of the burner, extending the service life of the equipment.

[0036] In summary, this multi-nozzle exhaust gas burner, through the coordinated operation of the bottom burner 1 and the circumferentially evenly distributed side burners 4, forms a radially diffused flame, expanding the range of the high-temperature zone of the flame, increasing the contact area and mixing efficiency between the exhaust gas and the flame, thereby achieving complete combustion of the exhaust gas and improving thermal energy utilization.

[0037] In summary, the above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.

Claims

1. A multi-nozzle exhaust gas burner, comprising a bottom burner, wherein a first flame injection end is provided on the bottom burner, characterized in that, It also includes a guide wall, one end of which is arranged around the first flame jet end. The guide wall is funnel-shaped and has an exhaust gas inlet. A side-mounted burner assembly is arranged on the outside of the guide wall. The side-mounted burner assembly includes multiple side-mounted burners. Each side-mounted burner has a second flame jet end. The multiple second flame jet ends are fixedly installed on the guide wall and are evenly spaced along the circumference of the guide wall.

2. The multi-nozzle exhaust gas burner according to claim 1, characterized in that, The second flame jet end and the guide wall are at the same inclination angle and are arranged parallel to each other.

3. The multi-nozzle exhaust gas burner according to claim 2, characterized in that, The side-mounted burner group is provided in at least one group, and each group of side-mounted burner groups is spaced apart along the axial direction of the guide wall.

4. The multi-nozzle exhaust gas burner according to claim 1, characterized in that, The angle between the extension direction of the guide wall and its central axis is 15°-45°.

5. The multi-nozzle exhaust gas burner according to claim 1, characterized in that, The exhaust gas inlet is provided in multiple ways.

6. The multi-nozzle exhaust gas burner according to claim 1, characterized in that, A flame deflector is provided at the open end of the guide wall.

7. The multi-nozzle exhaust gas burner according to claim 1, characterized in that, The guide wall is made of high-temperature resistant alloy material.

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