Waste gas heat value self-adaptive combined burner

Abstract

The invention relates to the field of chemical incineration, in particular to a waste gas heat value self-adaptive combined combustor which comprises an ignition device, a flame detector, a sight glass, a hearth, a waste gas pipeline, a waste gas combustion-supporting pipeline, a main gas pipeline and a main gas combustion-supporting pipeline. Different types of waste gas can enter the hearth through the waste gas pipeline, the waste gas can effectively flow to the hearth under the action of the waste gas combustion-supporting pipeline, main gas can be better and fully combusted through the arrangement of the main gas pipeline and the main gas combustion-supporting pipeline, meanwhile, the ignition device, the flame detector and the sight glass are matched, and the combustion efficiency is improved. The high-concentration waste gas combustion-supporting device has the advantages that in the chemical incineration process, when the heat value of the waste gas is low, the waste gas can be sprayed into the hearth, when the heat value of the waste gas is high, combustion-supporting air and the high-concentration waste gas can be rapidly mixed, and meanwhile the effect of stabilizing waste gas flames can be achieved.

Description

Technical Field

[0001] The present application relates to the field of chemical incineration, and in particular to a waste gas calorific value adaptive combined burner. Background Art

[0002] During the incineration of chemical waste gas, due to the change of parameters of the front-end production process, the composition of the waste gas generated at the production end will also change, which will cause the calorific value of the waste gas to fluctuate accordingly. The traditional practice is to transport the waste gas through a straight pipe on the furnace, control the angle of the waste gas to spray toward the root of the burner, and do not distribute air separately. When the calorific value of the waste gas is less than 500Kcal, because there are fewer combustible components in the waste gas, the waste gas can be directly sprayed into the furnace for high-temperature cracking, and the redox reaction is carried out in a flameless state. However, once the calorific value fluctuates by ≥500Kcal, or even reaches more than 1250Kcal, the amount of oxygen required for this waste gas will increase due to the increase in the content of combustible components, and an open flame will be formed in the furnace. Because it is impossible to distribute air separately for this waste gas, incomplete combustion will occur when the waste gas concentration is too high, resulting in substandard waste gas treatment or excessive carbon monoxide. If you choose to distribute air to this exhaust gas separately in the furnace, too much air will be directed to the root of the flame, which will affect the stability of the main flame. At the same time, it is impossible to set up a complex air distribution structure in the furnace. Even if you choose to distribute air separately, the mixing effect of high-concentration exhaust gas and combustion-supporting air is not ideal.

[0003] In the related technology, the way to treat chemical waste gas is to transport it through a straight pipe on the furnace, control the angle of the waste gas to spray toward the root of the main flame of the burner, and do not distribute air separately. However, there is no problem when the calorific value is low, but when the calorific value is high, there is no air distribution, the waste gas treatment does not meet the standard, and the carbon monoxide exceeds the standard.

[0004] Therefore, a stable air distribution structure is needed, which can spray the exhaust gas into the furnace when the exhaust gas calorific value is low, and can quickly mix the combustion-supporting air with the high-concentration exhaust gas when the exhaust gas calorific value is high, while stabilizing the exhaust gas flame. Summary of the invention

[0005] In order to spray the exhaust gas into the furnace when the exhaust gas calorific value is low during the chemical incineration process, and to quickly mix the combustion-supporting air with the high-concentration exhaust gas when the exhaust gas calorific value is high, while stabilizing the exhaust gas flame, the present application provides an exhaust gas calorific value adaptive combined burner.

[0006] The present application provides an exhaust gas calorific value adaptive combined burner adopting the following technical solution: An exhaust gas calorific value adaptive combined burner includes an ignition device, a flame detector, a sight glass, and also includes: A furnace, wherein a gas collecting chamber is arranged on the furnace, a delivery pipe is arranged in the furnace, a plurality of the delivery pipes are arranged, and the plurality of the delivery pipes are connected to the gas collecting chamber; An exhaust gas pipeline is arranged on the furnace, and the exhaust gas pipeline is communicated with the furnace; An exhaust gas combustion-supporting pipeline is arranged on the furnace, and the exhaust gas combustion-supporting pipeline is communicated with the furnace; A main gas pipeline is arranged at one end of the furnace away from the gas collecting chamber, and the central axis of the main gas pipeline is parallel to the central axis of the main gas pipeline. The ignition device, the flame detector, and the sight glass are all arranged on the main gas pipeline. A delivery pipe is also arranged in the main gas pipeline, and the main gas pipeline is connected to the delivery pipeline; The main gas combustion-supporting pipeline is arranged on the main gas pipeline, and the main gas combustion-supporting pipeline is communicated with the delivery pipeline.

[0007] By adopting the above-mentioned technical scheme, the burner of the present application is configured as a combination of an ignition device, a flame detector, a sight glass, a furnace, an exhaust gas pipe, an exhaust gas combustion-supporting pipe, a main gas pipe, and a main gas combustion-supporting pipe, so that when the burner of the present application is used for exhaust gas treatment, the main fuel and the exhaust gas can be effectively integrated on the same burner to form a unique combined burner structure. Due to the unique structural setting of the burner of the present application itself, the exhaust gas treatment can be more thorough, and the present application can effectively treat multiple exhaust gases. At the same time, the setting of the exhaust gas combustion-supporting pipe and the main gas combustion-supporting pipe can effectively promote the mixing of the exhaust gas and the combustion-supporting air and the mixing of the main gas and the combustion-supporting air, thereby improving the scope of the exhaust gas that the burner of the present application is suitable for treating. To a certain extent, the present application has the ability to spray the exhaust gas into the furnace when the calorific value of the exhaust gas is low during the chemical incineration process, and to quickly mix the combustion-supporting air with the high-concentration exhaust gas when the calorific value of the exhaust gas is high, while stabilizing the exhaust gas flame.

[0008] Optionally, an interlayer is provided in the furnace, and the plurality of conveying pipes are located in the interlayer and are arranged in parallel.

[0009] By adopting the above technical solution and setting of the interlayer, the waste gas, the waste gas combustion-supporting air, the main gas, and the main gas combustion-supporting air can be effectively separated for treatment.

[0010] Optionally, a partition plate is further provided in the interlayer, the axis of the delivery pipe is perpendicular to the plane of the partition plate, and there are multiple partition plates, which divide the interlayer into multiple annular channels for different types of gases to flow.

[0011] By adopting the above technical solution, the role of the partition plate is to enable different types of exhaust gases to have independent flow paths, thereby avoiding the situation where the combustion efficiency becomes low due to the mixing of different exhaust gases.

[0012] Optionally, the delivery pipe is arranged in a multi-stage casing.

[0013] By adopting the above technical solution, the multi-stage sleeve structure is conducive to the staged transportation and mixing of gases, thereby improving the efficiency of the combustion reaction.

[0014] Optionally, a conical blunt-body guide is further provided at one end of the delivery pipe connected to the main gas duct close to the gas collecting chamber, and the angle between the central axis of the conical blunt-body guide and the central axis of the delivery pipe where it is located is 60°, 75° or 90°.

[0015] By adopting the above technical solution, the conical blunt body guide can effectively optimize the flow direction and adapt to different types of exhaust gas treatment requirements.

[0016] Optionally, a swirl blade is provided at one end of the main air duct close to the air collecting chamber.

[0017] By adopting the above technical solution, the design of the swirl blades increases the turbulence intensity of the combustion, helps to completely burn the exhaust gas, and reduces pollutant emissions.

[0018] Optionally, a plurality of the exhaust gas pipes are provided, and a plurality of the exhaust gas combustion-supporting pipes are provided, and the plurality of the exhaust gas pipes correspond one-to-one to the plurality of the exhaust gas combustion-supporting pipes.

[0019] By adopting the above technical solution and multiple arrangements of the exhaust gas pipes and the exhaust gas combustion-supporting pipes, the burner of the present application is further improved.

[0020] Optionally, the flow velocity of the exhaust gas pipe is not less than 20 m / s, and the flow velocity of the exhaust gas combustion-supporting pipe is not less than 15 m / s.

[0021] By adopting the above technical solution, the limitation of flow rate ensures the sufficiency of combustion and avoids incomplete combustion caused by too low flow rate.

[0022] Optionally, the gas collecting chamber is integrally cast by refractory material.

[0023] By adopting the above technical solution, the integrated casting of refractory materials enhances the overall strength of the gas collecting chamber and reduces the risk of cracks caused by thermal stress.

[0024] Optionally, refractory bricks are also provided, and a plurality of refractory bricks are provided, and the plurality of refractory bricks are laid together in the gas collecting chamber.

[0025] By adopting the above technical solution, the block-by-block laying of refractory bricks is convenient for repair and replacement, thus reducing maintenance costs.

[0026] In summary, the present application includes at least one of the following beneficial technical effects: 1. By configuring the burner of the present application as a combination of an ignition device, a flame detector, a sight glass, a furnace, an exhaust gas pipe, an exhaust gas combustion-supporting pipe, a main gas pipe, and a main gas combustion-supporting pipe, the exhaust gas treatment can be made more thorough, and the present application can effectively treat multiple exhaust gases. At the same time, the configuration of the exhaust gas combustion-supporting pipe and the main gas combustion-supporting pipe can effectively promote the mixing of the exhaust gas and the combustion-supporting air, as well as the mixing of the main gas and the combustion-supporting air, thereby increasing the scope of the exhaust gas that the burner of the present application is applicable to treat. The present application has the effect of spraying the exhaust gas into the furnace to a certain extent during the chemical incineration process when the exhaust gas calorific value is low, and can quickly mix the combustion-supporting air with the high-concentration exhaust gas when the exhaust gas calorific value is high, while stabilizing the exhaust gas flame; 2. The arrangement of interlayers and partitions can effectively separate the waste gas, waste gas combustion-supporting air, main gas, and main gas combustion-supporting air for treatment, thus avoiding the situation where the combustion efficiency becomes low due to the mixing of different waste gases; 3. The multi-stage casing structure helps to transport and mix the gas in stages, thus improving the efficiency of the combustion reaction. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] Figure 1 It is a schematic diagram of the overall structure of an exhaust gas calorific value adaptive combined burner according to an embodiment of the present application.

[0028] Figure 2 yes Figure 1 Front view of .

[0029] Figure 3 yes Figure 2 AA cross-section diagram.

[0030] Figure 4 yes Figure 3 Magnified view of area A.

[0031] Description of reference numerals: 1. Ignition device; 2. Flame detector; 3. Sight glass; 4. Furnace; 41. Gas collecting chamber; 42. Delivery pipe; 5. Exhaust gas pipeline; 6. Exhaust gas combustion-supporting pipeline; 7. Main gas pipeline; 8. Main gas combustion-supporting pipeline; 9. Interlayer; 10. Partition plate; 11. Conical blunt body guide; 12. Swirl blade; 13. Refractory brick. DETAILED DESCRIPTION

[0032] The following combination Figures 1 to 4 This application is described in further detail.

[0033] The embodiment of the present application discloses a combined burner with adaptive exhaust gas calorific value.

[0034] It should be noted that, in the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside" and the like indicating orientations or positional relationships are based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the present invention.

[0035] Reference Figure 1 , a waste gas calorific value adaptive combined burner includes an ignition device 1, a flame detector 2, a sight glass 3, a furnace 4, an exhaust gas pipe 5, an exhaust gas combustion-supporting pipe 6, a main gas pipe 7, and a main gas combustion-supporting pipe 8. The burner composed of the above structures can allow different types of exhaust gases to enter the furnace 4 through the exhaust gas pipe 5 when treating chemical exhaust gas, and under the action of the exhaust gas combustion-supporting pipe 6, the exhaust gas can effectively flow to the furnace 4. The arrangement of the main gas pipe 7 and the main gas combustion-supporting pipe 8 can make the main gas burn better and more fully, and at the same time, cooperate with the ignition device 1, the flame detector 2 and the sight glass 3 to keep the entire burner running stably and efficiently. The present application has the effect of spraying the exhaust gas into the furnace 4 to a certain extent during the chemical incineration process when the exhaust gas calorific value is low, and can quickly mix the combustion-supporting wind with the high-concentration exhaust gas when the exhaust gas calorific value is high, while stabilizing the exhaust gas flame.

[0036] It should be noted that the ignition device 1, flame detector 2, and sight glass 3 in the embodiments of the present application are all relatively well known in the art, and those skilled in the art can understand their functions and usages. Therefore, the ignition device 1, flame detector 2, and sight glass 3 are not described in detail in the embodiments of the present application.

[0037] Specifically, refer to Figure 2 and Figure 3 In the embodiment of the present application, the furnace 4 is configured to be cylindrical. In other embodiments, the furnace 4 may also be configured to be cuboid, which is also a preferred embodiment of the present application. A gas collecting chamber 41 is provided on the furnace 4, and a delivery pipe 42 is provided in the furnace 4. A plurality of delivery pipes 42 are provided, and the plurality of delivery pipes 42 are connected to the gas collecting chamber 41. That is to say, the furnace 4 realizes the function of transferring the exhaust gas and the main gas through the delivery pipe 42, wherein the main gas will be collected at the gas collecting chamber 41, and the exhaust gas will be transferred to one end of the gas collecting chamber 41.

[0038] Furthermore, an interlayer 9 is provided in the furnace 4, and a plurality of conveying pipes 42 are all located in the interlayer 9 and are arranged in parallel. In the embodiment of the present application, the interlayer 9 is provided with one layer along the inner wall of the furnace 4. In other embodiments, the interlayer 9 can also be provided with two layers, three layers or other numbers of multiple layers according to the situation, which is also a preferred embodiment of the present application.

[0039] The interlayer 9 can effectively separate the waste gas, waste gas combustion-supporting air, main gas, and main gas combustion-supporting air for processing. The delivery pipe 42 is arranged in the interlayer 9 to provide better heat exchange conditions and improve combustion efficiency. The parallel delivery pipes 42 reduce gas flow resistance and ensure smooth gas flow.

[0040] Furthermore, a partition plate 10 is further provided in the interlayer 9, the axis of the delivery pipe 42 is perpendicular to the plane of the partition plate 10, and multiple partition plates 10 are provided, and the multiple partition plates 10 divide the interlayer 9 into multiple annular channels for different types of gas to flow. In the embodiment of the present application, two partition plates 10 are provided in the interlayer 9, dividing the interlayer 9 into three annular channels. In other embodiments, the partition plates 10 can also be provided in three, four, or other numbers, which is also a preferred embodiment of the present application.

[0041] The partition plate 10 divides the interlayer 9 into a plurality of annular channels, making the flow paths of different types of gases independent and avoiding gas mixing that causes a decrease in combustion efficiency. The design of the vertical delivery pipe 42 helps to achieve uniform gas supply and improve the uniformity and stability of combustion.

[0042] At the same time, the interlayer 9 is matched with the partition plate 10 to form a delivery pipe 42 in a multi-stage sleeve arrangement. That is, in order to separate different types of gases, the delivery pipe 42 in the present application is made in the form of a sleeve so that the gases in different annular channels will not mix. The multi-stage sleeve structure helps to transport and mix the gases in stages and improve the efficiency of the combustion reaction. Through the sleeve type of transportation, the higher the calorific value of the exhaust gas is, the closer it is to the center.

[0043] At the same time, the delivery pipe 42 located outside the interlayer 9, that is, the delivery pipe 42 used to deliver the main gas, is connected to the main gas pipeline 7. The delivery pipe 42 connected to the main gas pipeline 7 is also provided with a tapered blunt body guide 11 at one end close to the gas collecting chamber 41, and the angle between the central axis of the tapered blunt body guide 11 and the central axis of the delivery pipe 42 where it is located is 60°, 75° or 90°.

[0044] The conical blunt-body guide 11 can effectively optimize the flow direction and adapt to different types of exhaust gas treatment requirements. The setting at different angles can effectively improve flexibility. At the same time, it can evenly distribute a large amount of exhaust gas into multiple streams, thereby forming a circularly uniform distribution pattern after entering the furnace 4, so as to evenly distribute the temperature field of the furnace 4. The guide cone controls the exhaust gas injection direction and promotes the mixing of combustion air and exhaust gas.

[0045] Specifically, refer to Figure 1 and Figure 3 The exhaust gas pipe 5 is arranged on the furnace 4, and the exhaust gas pipe 5 is connected with the furnace 4, and the exhaust gas pipe 5 is used to input the exhaust gas. The exhaust gas combustion-supporting pipe 6 is arranged on the furnace 4, and the exhaust gas combustion-supporting pipe 6 is connected with the furnace 4.

[0046] Furthermore, in the embodiment of the present application, a plurality of exhaust gas pipes 5 are provided, and a plurality of exhaust gas combustion-supporting pipes 6 are provided, and the plurality of exhaust gas pipes 5 correspond one to one to the plurality of exhaust gas combustion-supporting pipes 6 .

[0047] The provision of multiple exhaust gas pipes 5 and multiple exhaust gas combustion-supporting pipes 6 further improves the performance of the burner of the present application.

[0048] At the same time, the flow rate of the exhaust gas pipeline 5 is not less than 20m / s, and the flow rate of the exhaust gas combustion-supporting pipeline 6 is not less than 15m / s.

[0049] Limiting the flow rate ensures sufficient combustion and avoids incomplete combustion caused by too low a flow rate.

[0050] Specifically, refer to Figure 3 and Figure 4 The main gas pipeline 7 is arranged at one end of the furnace 4 away from the gas collecting chamber 41, and the central axis direction of the main gas pipeline 7 is parallel to the central axis of the main gas pipeline 7. The ignition device 1, the flame detector 2, and the sight glass 3 are all arranged on the main gas pipeline 7. A delivery pipe 42 is also arranged in the main gas pipeline 7, and the main gas pipeline 7 is connected to the delivery pipe 42.

[0051] The main gas combustion-supporting pipeline 8 is arranged on the main gas pipeline 7 , and the main gas combustion-supporting pipeline 8 and the delivery pipe 42 are interconnected.

[0052] Furthermore, a swirl blade 12 is provided at one end of the main gas duct 7 near the gas collecting chamber 41. In the embodiment of the present application, the swirl angle of the swirl blade 12 is set to 30° to 60° depending on the situation, and the 45° blade is conventionally used as a reference. When the exhaust gas flow is large and the flame length needs to be shortened, the swirl angle is increased, and vice versa, the swirl angle is reduced. The setting of the swirl blade 12 enables the combustion-supporting wind to form a local swirl flow field.

[0053] The design of the swirl blades 12 increases the turbulence intensity of the combustion, helps complete combustion of the exhaust gas, and reduces pollutant emissions.

[0054] Specifically, the gas collecting chamber 41 is integrally cast by refractory materials.

[0055] The integrated casting of refractory materials enhances the overall strength of the gas collecting chamber 41 and reduces the risk of cracks caused by thermal stress.

[0056] Furthermore, a refractory brick 13 is provided. A plurality of refractory bricks 13 are provided, and the plurality of refractory bricks 13 are laid together in the gas collecting chamber 41 .

[0057] The block-by-block laying of the refractory bricks 13 facilitates maintenance and replacement, reduces maintenance costs, and can additionally improve the heat resistance and energy efficiency of the burner.

[0058] In combination with the above content, the beneficial effects of the burner of the present application are explained in detail. 1: The exhaust gas delivery is integrated on the burner, avoiding the production of a complex structure inside the furnace 4 and simplifying the furnace 4; 2: The exhaust gas can be separately distributed on the burner, and the distribution volume is preferably recommended to remain unchanged (it can also be adjusted), avoiding complex control logic. When the calorific value of the exhaust gas is high, the exhaust gas can be mixed with the combustion-supporting air under the action of the cyclone flow field of the combustion-supporting air at the first time. The center of the cyclone flow field is a low-pressure area, which can help the high calorific value exhaust gas to establish a stable flame, thereby improving the cracking efficiency of the exhaust gas; when the calorific value of the exhaust gas is low, the exhaust gas can also be combined with oxygen at the first time to advance the oxidation-reduction reaction of the exhaust gas and extend the effective residence time of the exhaust gas in the furnace; in actual operation, the characteristic of the fluctuation of the calorific value of the exhaust gas can be ignored, and the present invention can automatically adapt to the incoming gas with high or low calorific value, highlighting its adaptability; 3: It can realize the integration of various exhaust gases with calorific value fluctuation characteristics, simplify on-site piping and structure, and highlight integration; 4: The setting of the front-end castable lining can separate the central stable fuel flame from the peripheral fluctuation factors, and the peripheral exhaust gas enters the furnace after the central stable fuel flame is established, that is, no matter how the calorific value or flow of the exhaust gas in the periphery fluctuates, it will not affect the stability of the central main flame. In actual operation, within the treatment range of the incinerator, the exhaust gas can be directly introduced into the furnace 4 without any adjustment means. The furnace temperature of the incinerator or the steam production demand of the rear waste heat boiler is only adjusted by the flow rate of the central main fuel gas, which also simplifies the control logic.

[0059] The implementation principle of the exhaust gas calorific value adaptive combined burner of the embodiment of the present application is: the burner of the present application is set as a combination of an ignition device 1, a flame detector 2, a sight glass 3, a furnace 4, an exhaust gas pipe 5, an exhaust gas combustion-supporting pipe 6, a main gas pipe 7, and a main gas combustion-supporting pipe 8, so that when the burner of the present application is used for exhaust gas treatment, the main fuel and the exhaust gas can be effectively integrated on the same burner to form a unique combined burner structure. Due to the unique structural setting of the burner of the present application itself, the exhaust gas The treatment is more thorough, and the present application can effectively treat multiple exhaust gases. At the same time, the arrangement of the exhaust gas combustion-supporting pipe 6 and the main gas combustion-supporting pipe 8 can effectively promote the mixing of the exhaust gas and the combustion-supporting air and the mixing of the main gas and the combustion-supporting air, thereby improving the scope of exhaust gases that can be treated by the burner of the present application. The present application has the ability to spray the exhaust gas into the furnace 4 to a certain extent during the chemical incineration process when the exhaust gas calorific value is low, and can quickly mix the combustion-supporting air with the high-concentration exhaust gas when the exhaust gas calorific value is high, while stabilizing the exhaust gas flame.

[0060] The above are all preferred embodiments of the present application, and the protection scope of the present application is not limited thereto. Therefore, any equivalent changes made according to the structure, shape, and principle of the present application should be included in the protection scope of the present application.

Claims

1. An exhaust gas calorific value adaptive combined burner, comprising an ignition device (1), a flame detector (2), and a sight glass (3), characterized in that: Also includes: A furnace (4), wherein a gas collecting chamber (41) is provided on the furnace (4), a delivery pipe (42) is provided in the furnace (4), a plurality of the delivery pipes (42) are provided, and the plurality of the delivery pipes (42) are in communication with the gas collecting chamber (41); An exhaust gas pipe (5) is arranged on the furnace (4), and the exhaust gas pipe (5) and the furnace (4) are in communication with each other; An exhaust gas combustion-supporting pipeline (6) is arranged on the furnace (4), and the exhaust gas combustion-supporting pipeline (6) and the furnace (4) are in communication with each other; A main gas pipeline (7) is arranged at one end of the furnace (4) away from the gas collecting chamber (41), and the central axis direction of the main gas pipeline (7) is parallel to the central axis of the main gas pipeline (7). The ignition device (1), the flame detector (2), and the sight glass (3) are all arranged on the main gas pipeline (7). A delivery pipe (42) is also arranged in the main gas pipeline (7), and the main gas pipeline (7) is connected to the delivery pipe (42). The main gas combustion-supporting pipeline (8) is arranged on the main gas pipeline (7), and the main gas combustion-supporting pipeline (8) and the delivery pipe (42) are interconnected.

2. The exhaust gas calorific value adaptive combined burner according to claim 1 is characterized in that: An interlayer (9) is provided in the furnace (4), and the plurality of conveying pipes (42) are all located in the interlayer (9) and are arranged in parallel.

3. The exhaust gas calorific value adaptive combined burner according to claim 2 is characterized in that: A partition plate (10) is also provided in the interlayer (9), the axis of the delivery pipe (42) is perpendicular to the plane of the partition plate (10), a plurality of the partition plates (10) are provided, and the plurality of the partition plates (10) divide the interlayer (9) into a plurality of annular channels for the circulation of different types of gases.

4. The exhaust gas calorific value adaptive combined burner according to claim 1, characterized in that: The delivery pipe (42) is arranged in a multi-stage casing.

5. The exhaust gas calorific value adaptive combined burner according to claim 1, characterized in that: A conical blunt-body guide (11) is also provided at one end of the delivery pipe (42) connected to the main gas pipeline (7) and close to the gas collecting chamber (41), and the angle between the central axis of the conical blunt-body guide (11) and the central axis of the delivery pipe (42) where it is located is 60°, 75° or 90°.

6. The exhaust gas calorific value adaptive combined burner according to claim 1, characterized in that: A swirl blade (12) is provided at one end of the main gas pipeline (7) close to the gas collecting chamber (41).

7. The exhaust gas calorific value adaptive combined burner according to claim 1, characterized in that: A plurality of the exhaust gas pipes (5) are provided, and a plurality of the exhaust gas combustion-supporting pipes (6) are provided, and the plurality of the exhaust gas pipes (5) correspond one to one with the plurality of the exhaust gas combustion-supporting pipes (6).

8. The exhaust gas calorific value adaptive combined burner according to claim 7, characterized in that: The flow rate of the exhaust gas pipeline (5) is not less than 20 m / s, and the flow rate of the exhaust gas combustion-supporting pipeline (6) is not less than 15 m / s.

9. The exhaust gas calorific value adaptive combined burner according to claim 1, characterized in that: The gas collecting chamber (41) is integrally cast from refractory material.

10. The exhaust gas calorific value adaptive combined burner according to claim 9, characterized in that: Refractory bricks (13) are also provided. A plurality of refractory bricks (13) are provided, and the plurality of refractory bricks (13) are laid together in the gas collecting chamber (41).

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