An ultra-low nitrogen burner for gas staged combustion

Abstract

The present invention relates to the technical field of ultra-low nitrogen burners, and discloses an ultra-low nitrogen burner with staged combustion of gas, comprising a combustion furnace, one side of the combustion furnace is fixedly connected with an air supply mechanism, the other side of the combustion furnace is fixedly connected with an exhaust pipe, the side of the air supply mechanism away from the combustion furnace is fixedly connected with a gas pipe, the top of the air supply mechanism is fixedly connected with an air intake pipe, the side of the exhaust pipe away from the combustion furnace is fixedly connected with a processing mechanism, and one side of the processing mechanism is fixedly connected with a power generation; the gas of the present invention enters into a central partition tube through a gas pipe, part of the gas in the central partition tube enters into an inner partition tube through an exhaust hole, part of the gas enters into a middle partition tube through a second gas pipe, and part of the gas enters into an outer fixed tube through a first gas pipe, and is respectively mixed with air in the intake pipe, so that the gas and air can be fully mixed, so that it can be more thoroughly burned in the oxygen-rich combustion stage.

Description

Technical Field

[0001] The present invention relates to the technical field of ultra-low nitrogen burners, and more specifically to an ultra-low nitrogen burner for staged combustion of gas. Background Art

[0002] Nitrogen oxides are one of the main sources of atmospheric pollution and an important precursor of PM2.5 secondary particles. Environmental pollution is getting worse. With the combustion and utilization of natural gas, liquefied petroleum gas and coal synthesis gas, the pollution problem of gas combustion, especially the reduction of nitrogen oxide emissions, is of great significance to control the generation of nitrogen oxides in the combustion process of natural gas and vigorously develop low-nitrogen clean combustion technology.

[0003] Combustion facilities including burners should have the characteristics of high combustion efficiency and low emission pollution, especially reducing the emission of nitrogen oxides to achieve ultra-low nitrogen clean combustion. Today's low-nitrogen burners are devices that add blowers, induced draft fans, inverters, control valves and multiple circuits to traditional burners to allow clean energy and burner operations to provide more efficient heat energy for boilers. Low-nitrogen burners fully mix gas and air to make them ultra-low nitrogen burners;

[0004] When the traditional ultra-low nitrogen burner is in use, when the gas is sprayed into the furnace, the gas needs to be mixed with air to make it burn. However, in order to reduce nitrogen emissions, it is necessary to control oxygen-poor combustion and oxygen-rich combustion, which is generally achieved by changing the amount of air entering. However, in the oxygen-rich combustion stage, only increasing the amount of air cannot mix the combustion and air evenly, which makes the oxygen-rich combustion incomplete, resulting in increased nitrogen oxide emissions.

[0005] After the fuel gas sprayed by the ultra-low nitrogen burner is burned, the exhaust gas needs to be treated. The traditional method is generally to return part of the exhaust gas to the inside of the furnace and discharge part of it, but the discharge will also cause pollution, and the refluxed exhaust gas contains more other gases, which will affect the normal combustion. When the fuel gas burns, the gas will expand, so its flow rate is relatively high when it is discharged, and the traditional exhaust gas treatment device does not treat it well. Summary of the invention

[0006] In order to overcome the above-mentioned defects of the prior art, the implementation regulations of the present invention provide an ultra-low nitrogen burner for staged combustion of gas to solve the technical problems raised in the background technology.

[0007] To achieve the above-mentioned purpose, the present invention provides the following technical solutions: an ultra-low nitrogen burner for staged combustion of gas, comprising a combustion furnace, an air supply mechanism is fixedly connected to one side of the combustion furnace, an exhaust pipe is fixedly connected to the other side of the combustion furnace, a gas pipe is fixedly connected to the side of the air supply mechanism away from the combustion furnace, an air intake pipe is fixedly connected to the top of the air supply mechanism, a processing mechanism is fixedly connected to the side of the exhaust pipe away from the combustion furnace, a generator is fixedly connected to one side of the processing mechanism, a return pipe is fixedly connected to the top of the other side of the processing mechanism, and the side of the return pipe away from the processing mechanism is fixedly connected to the side of the air supply mechanism;

[0008] The air supply mechanism includes a fixed plate for support, the interior of the fixed plate is fixedly connected to the side of the gas pipe, the side of the gas pipe is fixedly connected with a center partition, the side of the center partition is provided with an exhaust hole, and the side of the center partition is fixedly connected with a second air pipe and a first air pipe, the side of the second air pipe away from the center partition is fixedly connected with an inner partition, the side of the first air pipe away from the center partition is fixedly connected with a middle partition, the side of the center partition away from the gas pipe is movably connected with a swirl fan, the side of the swirl fan is movably connected with an outer fixed cylinder, the outer fixed cylinder is located on the outside of the middle partition, the top of the gas pipe is fixedly connected with an air inlet pipe, the side of the fixed plate is provided with a avoidance groove compatible with the adjustment mechanism, and the side of the air inlet pipe is provided with a gas hole.

[0009] In a preferred embodiment, the gas holes on the side of the air inlet pipe are arranged in three groups, and the three groups of gas holes are respectively located between the outer fixing tube and the middle partition tube, between the middle partition tube and the first air pipe, and between the inner partition tube and the center partition tube from top to bottom.

[0010] In a preferred embodiment, the bottom end of the treatment mechanism away from the generator side is fixedly connected with a downpipe, the downpipe is located inside the purification tank, and the bottom end of the downpipe is located below the water surface of the purification tank, and the return pipe and the downpipe are located at the farthest end of the treatment mechanism away from the generator.

[0011] In a preferred embodiment, the exhaust holes, the second air pipes and the first air pipes are arranged in six groups, and the angles between the six groups of exhaust holes, the second air pipes and the first air pipes are all sixty degrees, and all the exhaust holes, the second air pipes and the first air pipes are distributed at equal angles on the side of the central partition tube.

[0012] In a preferred embodiment, the adjustment mechanism includes a fixed shaft fixed inside the air intake pipe, a rotating plate is movably sleeved on the side of the fixed shaft, a movable plate is provided at the bottom end of the rotating plate, a limiting hole matched with the limiting rod is opened on the side of the movable plate away from the rotating plate, and a spring is provided on the side of the limiting rod.

[0013] In a preferred embodiment, when the movable plate is pushed out by the spring, the bottom end of the rotating plate is located below the gas hole on the side of the intake pipe. When the side of the rotating plate away from the fixed axis contacts the inside of the intake pipe, the rotating plate seals the bottom end of the intake pipe.

[0014] In a preferred embodiment, the return pipe is fixedly connected to an arc-shaped circular tube on the side close to the outer fixed tube, and the arc-shaped circular tube is fixedly connected to a gas branch pipe on the side close to the swirl fan. The outlet of the gas branch pipe is arranged on the outer side of the outer fixed tube, and the number of the gas branch pipes is eight.

[0015] In a preferred embodiment, the processing mechanism includes a diversion box that can accommodate exhaust gas, the bottom end of the inside of the diversion box is fixedly connected to a support plate, the top of the support plate is movably connected to a rotating shaft, one side of the rotating shaft is fixedly connected to a filter plate, the other side of the rotating shaft is fixedly connected to a generator, and the side of the rotating shaft is fixedly connected to a first bevel gear.

[0016] In a preferred embodiment, the side of the first bevel tooth is meshed with a second bevel tooth, the side of the second bevel tooth away from the first bevel tooth is fixedly connected with a blade, the inside of the diverter box is fixedly connected with the first bevel tooth, the side of the filter plate close to the scraper is in contact with the scraper, and the length of the scraper is greater than the diameter of the filter plate.

[0017] Technical effects and advantages of the present invention:

[0018] The gas of the present invention enters the central partition tube through the gas pipe, part of the gas in the central partition tube enters the inner partition tube through the exhaust hole, part of the gas enters the middle partition tube through the second gas pipe, and part of the gas enters the outer fixed tube through the first gas pipe, and is mixed with the air in the intake pipe respectively, so that the gas and the air can be fully mixed, so that it can be burned more thoroughly in the oxygen-enriched combustion stage;

[0019] In the present invention, during oxygen-poor combustion, the flow rate in the gas pipe is greater than the flow rate in the air intake pipe, and the spring supports the movable plate so that the rotating plate seals the air intake pipe. Part of the gas will directly enter the combustion furnace through the central partition tube, and the remaining gas will enter the combustion furnace after mixing with air at the sides of the central partition tube, the inner partition tube and the middle partition tube, thereby ensuring that oxygen-poor combustion can be carried out without excessive combustion.

[0020] The tail gas of the present invention is discharged through an exhaust pipe. When the tail gas flows in the exhaust pipe, the blades are driven to rotate. When the blades rotate, the rotating shaft is rotated through the second bevel gear and the first bevel gear. When the rotating shaft rotates, the generator is operated to generate electricity. The tail gas is filtered by the filter plate and then decelerated in the diversion box. The lighter methane in the tail gas is located in the upper layer and flows back to the air supply mechanism through the reflux pipe for use. The heavier nitrogen oxides in the lower layer enter the purification tank through the lower discharge pipe for filtration. All the tail gas is processed to achieve ultra-low nitrogen combustion emissions. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 It is a schematic diagram of the overall structure of the present invention.

[0022] Figure 2 It is a schematic diagram of the back side of the overall structure of the present invention.

[0023] Figure 3 It is a schematic diagram of the internal structure of the combustion furnace of the present invention.

[0024] Figure 4 It is a schematic diagram of the overall structure of the air supply mechanism of the present invention.

[0025] Figure 5 It is a schematic diagram of the internal structure of the middle partition tube of the present invention.

[0026] Figure 6 It is a schematic diagram of the internal structure of the inner partition tube of the present invention.

[0027] Figure 7 It is a schematic diagram of the internal structure of the central partition tube of the present invention.

[0028] Figure 8 It is a schematic diagram of the structure of the regulating mechanism of the present invention.

[0029] Fig. 9 It is a schematic diagram of the reflux pipe structure of the present invention.

[0030] Fig.10 It is a schematic diagram of the internal structure of the diverter box of the present invention.

[0031] Fig.11 It is a schematic diagram of the explosion structure of the processing mechanism of the present invention.

[0032] The accompanying drawings are marked as follows: 1. combustion furnace; 2. air supply mechanism; 201. fixed plate; 202. outer fixed cylinder; 203. swirl fan; 204. middle partition cylinder; 205. first air pipe; 206. inner partition cylinder; 207. second air pipe; 208. central partition cylinder; 209. exhaust hole; 3. gas pipe; 4. air inlet pipe; 5. exhaust pipe; 6. processing mechanism; 601. diverter box; 602. support plate; 603. rotating shaft; 604. scraper; 605. filter plate; 606. first bevel gear; 607. second bevel gear; 608. blade; 7. return pipe; 701. arc circular pipe; 702. gas branch pipe; 8. lower discharge pipe; 9. purification tank; 10. generator; 11. adjustment mechanism; 111. fixed shaft; 112. rotating plate; 113. movable plate; 114. limit rod; 115. spring. DETAILED DESCRIPTION

[0033] The technical solution of the present invention will be clearly and completely described below in conjunction with the accompanying drawings in the present invention. In addition, the forms of the various structures recorded in the following embodiments are only examples. The ultra-low nitrogen burner for staged combustion of gas involved in the present invention is not limited to the various structures recorded in the following embodiments. All other embodiments obtained by ordinary technicians in this field without making creative work belong to the scope of protection of the present invention.

[0034] Reference Figure 1 , Figure 2 as well as Figure 3 The present invention provides an ultra-low nitrogen burner for staged combustion of gas, comprising a combustion furnace 1, a gas supply mechanism 2 is fixedly connected to one side of the combustion furnace 1, an exhaust pipe 5 is fixedly connected to the other side of the combustion furnace 1, a gas pipe 3 is fixedly connected to the side of the gas supply mechanism 2 away from the combustion furnace 1, an air intake pipe 4 is fixedly connected to the top of the gas supply mechanism 2, a treatment mechanism 6 is fixedly connected to the side of the exhaust pipe 5 away from the combustion furnace 1, a generator 10 is fixedly connected to one side of the treatment mechanism 6, a return pipe 7 is fixedly connected to the top of the other side of the treatment mechanism 6, the return pipe 7 is fixedly connected to the side of the gas supply mechanism 2 away from the treatment mechanism 6, a lower discharge pipe 8 is fixedly connected to the bottom end of the treatment mechanism 6 away from the side of the generator 10, the lower discharge pipe 8 is located inside a purification tank 9, and the bottom end of the lower discharge pipe 8 is located below the water surface of the purification tank 9, and the return pipe 7 and the lower discharge pipe 8 are located at the farthest end of the treatment mechanism 6 away from the generator 10.

[0035] In the embodiment of the present application, when the present application is in use, when the tail gas is discharged, the tail gas will be treated in the treatment mechanism 6. The treated tail gas contains unburned methane and burned nitrogen oxides. The density of methane is less than that of nitrogen oxides, so methane flows back to the combustion furnace 1 at the top for combustion, and the nitrogen oxides are treated in the purification tank 9 and then discharged, so that the final emission process of the present application is pollution-free. The reflux pipe 7 and the lower discharge pipe 8 are located at the farthest end of the treatment mechanism 6 away from the generator 10, so that the gas has enough space for stratification in the treatment mechanism 6. In addition, it should be noted that after the present application performs oxygen-poor combustion and oxygen-rich combustion, the nitrogen oxides generated at this time are less, but some are still contained, so they are treated in the purification tank 9 to ensure that the present application performs ultra-low nitrogen combustion and emission. The absorption liquid in the purification tank 9 can be adjusted according to the specific type of fuel gas, and the present application does not make detailed restrictions on it. In addition, heat exchange mechanisms can be added to the sides of the treatment mechanism 6 and the purification tank 9 to achieve heat recovery.

[0036] Reference Figure 4 , Figure 5 as well as Figure 6 The air supply mechanism 2 includes a fixed plate 201 for support, the interior of the fixed plate 201 is fixedly connected to the side of the gas pipe 3, the side of the gas pipe 3 is fixedly connected with a center partition 208, the side of the center partition 208 is provided with an exhaust hole 209, and the side of the center partition 208 is fixedly connected with a second gas pipe 207 and a first gas pipe 205, the side of the second gas pipe 207 away from the center partition 208 is fixedly connected with an inner partition 206, the side of the first gas pipe 205 away from the center partition 208 is fixedly connected with a middle partition 204, the side of the center partition 208 away from the gas pipe 3 is movably connected with a swirl fan 203, the side of the swirl fan 203 is movably connected with an outer fixed cylinder 202, the outer fixed cylinder 202 is located on the outside of the middle partition 204, the gas The top of the air pipe 3 is fixedly connected to the air intake pipe 4, the side of the fixed plate 201 is provided with a avoidance groove compatible with the adjustment mechanism 11, and the side of the air intake pipe 4 is provided with a gas hole. The gas holes on the side of the air intake pipe 4 are arranged in three groups, and the three groups of gas holes are respectively located between the outer fixed cylinder 202 and the middle partition cylinder 204, between the middle partition cylinder 204 and the first air pipe 205, and between the inner partition cylinder 206 and the center partition cylinder 208 from top to bottom. The exhaust holes 209, the second air pipe 207 and the first air pipe 205 are all arranged in six groups, and the angles between the six groups of exhaust holes 209, the second air pipe 207 and the first air pipe 205 are all sixty degrees, and all the exhaust holes 209, the second air pipe 207 and the first air pipe 205 are distributed at equal angles on the side of the center partition cylinder 208.

[0037] In the embodiment of the present application, when the fuel gas flows in the central partition 208, the air in the intake pipe 4 can directly enter the central partition 208 downward and mix with the fuel gas inside it. After mixing, the fuel gas and air in the central partition 208 will respectively enter the interior of the inner partition 206 through the exhaust holes 209 on the side of the central partition 208, enter the interior of the middle partition 204 through the second air pipe 207 on the side of the central partition 208, and enter the interior of the outer fixed tube 202 through the first air pipe 205 on the side of the central partition 208. At this time, they will intersect with the air on the side of the intake pipe 4 for secondary mixing. Finally, the fuel gas and air mixture that is ejected is a direct current gas directly ejected through the central partition 208 in the center. The gas mixed in the inner partition 206, the middle partition 204 and the outer fixed tube 202 rotates when it is ejected through the swirl fan 203, and thus becomes a swirl state on the side, so that the fuel gas and air are mixed more evenly, thereby reducing the generation of nitrogen oxides.

[0038] Reference Figure 7 and Figure 8 The adjusting mechanism 11 comprises a fixed shaft 111 fixed inside the air intake pipe 4, a rotating plate 112 is movably sleeved on the side of the fixed shaft 111, a movable plate 113 is provided at the bottom end of the rotating plate 112, a limiting hole matched with a limiting rod 114 is provided on the side of the movable plate 113 away from the rotating plate 112, a spring 115 is provided on the side of the limiting rod 114, when the movable plate 113 is pushed out by the spring 115, the bottom end of the rotating plate 112 is located below the gas hole on the side of the air intake pipe 4, when the side of the rotating plate 112 away from the fixed shaft 111 contacts the inside of the air intake pipe 4, the rotating plate 112 seals the bottom end of the air intake pipe 4.

[0039] In the embodiment of the present application, when oxygen-depleted combustion is required, only a small amount of air is needed. At this time, the gas flow rate in the gas pipe 3 is relatively fast, so that the rotating plate 112 moves upward to seal the bottom end of the intake pipe 4. Therefore, the gas is only mixed on the outside of the central partition 208. A small amount of mixing is performed to ensure that the oxygen-depleted process proceeds smoothly and avoid the traditional mixing method. Air is only applied through the intake pipe 4. When the air flow rate is low, stratification occurs between the air and the gas, that is, there is basically no mixing between the two, making it impossible for the gas to burn. When oxygen-rich combustion is performed, the flow rate of the intake pipe 4 is relatively fast, and the rotating plate 112 will rotate downward. At this time, the air in the intake pipe 4 will move downward into the central partition 208 for mixing, thereby improving the mixing effect of the gas and air.

[0040] Reference Fig. 9The side of the return pipe 7 close to the outer fixed tube 202 is fixedly connected with an arc-shaped circular tube 701, and the side of the arc-shaped circular tube 701 close to the swirl fan 203 is fixedly connected with a gas branch pipe 702. The outlet of the gas branch pipe 702 is arranged on the outer side of the outer fixed tube 202, and the number of the gas branch pipes 702 is eight.

[0041] In the embodiment of the present application, eight gas distribution pipes 702 are provided to spray gas on the outer side of the outer fixed cylinder 202. The sprayed gas will be located on the side of the combustion furnace 1 close to the air supply mechanism 2. At this time, the gas in the area is stirred, thereby solving the problem that when the traditional combustion furnace 1 is burning, the gas inlet cannot be directly blown to affect the combustion because of the air.

[0042] Reference Fig.10 and Fig.11 The processing mechanism 6 includes a diversion box 601 that can accommodate exhaust gas, a support plate 602 is fixedly connected to the bottom end of the diversion box 601, a rotating shaft 603 is movably connected to the top of the support plate 602, a filter plate 605 is fixedly connected to one side of the rotating shaft 603, and the other side of the rotating shaft 603 is fixedly connected to the generator 10, a first bevel gear 606 is fixedly connected to the side of the rotating shaft 603, a second bevel gear 607 is meshed on the side of the first bevel gear 606, a blade 608 is fixedly connected to the side of the second bevel gear 607 away from the first bevel gear 606, the first bevel gear 606 is fixedly connected to the inside of the diversion box 601, the side of the filter plate 605 close to the scraper 604 is in contact with the scraper 604, and the length of the scraper 604 is greater than the diameter of the filter plate 605.

[0043] In the embodiment of the present application, the exhaust gas flowing in the exhaust pipe 5 will drive the blades 608 to rotate. When the blades 608 rotate, they will drive the rotating shaft 603 to rotate after transmission. When the rotating shaft 603 rotates, the generator 10 is operated to generate electricity. When the exhaust gas flows in the diversion box 601, it is filtered by the filter plate 605 and then decelerated in the diversion box 601. The lighter methane in the exhaust gas is located in the upper layer and flows back to the air supply mechanism 2 through the reflux pipe 7 for use. The heavier nitrogen oxides in the lower layer enter the purification tank 9 through the lower discharge pipe 8 for filtration. All the exhaust gas is processed to achieve ultra-low nitrogen combustion emissions. When the exhaust gas is filtered through the filter plate 605, the rotating scraper 604 can scrape off the impurities on the filter plate 605.

[0044] Working principle of the present invention: when the gas is burning, it first performs oxygen-poor combustion. During oxygen-poor combustion, the flow rate of the gas pipe 3 is greater than the flow rate of the air inlet pipe 4. The gas in the gas pipe 3 enters the interior of the central partition tube 208, and part of the gas enters the interior of the inner partition tube 206 through the exhaust hole 209 on the side of the central partition tube 208, enters the interior of the middle partition tube 204 through the second gas pipe 207 on the side of the central partition tube 208, and enters the interior of the outer fixed tube 202 through the first gas pipe 205 on the side of the central partition tube 208. Part of the gas directly enters the combustion furnace 1 through the central partition tube 208. At this time, the air in the gas pipe 3 is mixed with the gas in the inner partition tube 206, the middle partition tube 204 and the outer fixed tube 202 through the air holes on its side and then enters the combustion furnace 1. At this time, there is less oxygen in the combustion furnace 1, which is convenient for oxygen-poor combustion.

[0045] When oxygen-rich combustion is performed after oxygen-lean combustion, the flow rate of the intake pipe 4 increases and is greater than the flow rate of the fuel gas pipe 3. When the flow rate of the intake pipe 4 is relatively large, the lower rotating plate 112 of the intake pipe 4 is blown to rotate downward around the fixed axis 111, and the adjustment mechanism 11 is moved and the spring 115 is compressed. At this time, most of the air in the intake pipe 4 will enter the central partition 208 and mix with the fuel gas in the central partition 208. The fuel gas in the inner partition 206, the middle partition 204 and the outer fixed cylinder 202 will also mix with the air normally, thereby improving the mixing effect of the fuel gas and the air.

[0046] When combustion is carried out in the combustion furnace 1, the exhaust gas is discharged through the exhaust pipe 5. The flow of the exhaust gas in the exhaust pipe 5 will drive the blade 608 to rotate. When the blade 608 rotates, the first bevel gear 606 is driven to rotate through the second bevel gear 607. The first bevel gear 606 drives the internal rotating shaft 603 to rotate. When the rotating shaft 603 rotates, the generator 10 is operated to generate electricity. When the exhaust gas flows in the diverter box 601, it is filtered by the filter plate 605 and then decelerated in the diverter box 601. The lighter methane in the exhaust gas is located in the upper layer and refluxes to the air supply mechanism 2 through the reflux pipe 7 for use. The heavier nitrogen oxides in the lower layer enter the purification tank 9 through the lower discharge pipe 8 for filtration. All the exhaust gas is processed to achieve ultra-low nitrogen combustion emissions.

[0047] Finally: The above are only preferred embodiments of the present invention and are not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. An ultra-low nitrogen burner for staged combustion of gas, comprising a combustion furnace (1), characterized in that: An air supply mechanism (2) is fixedly connected to one side of the combustion furnace (1), an exhaust pipe (5) is fixedly connected to the other side of the combustion furnace (1), a gas pipe (3) is fixedly connected to the side of the air supply mechanism (2) away from the combustion furnace (1), an air intake pipe (4) is fixedly connected to the top of the air supply mechanism (2), a processing mechanism (6) is fixedly connected to the side of the exhaust pipe (5) away from the combustion furnace (1), a generator (10) is fixedly connected to one side of the processing mechanism (6), a return pipe (7) is fixedly connected to the top of the other side of the processing mechanism (6), and the return pipe (7) is fixedly connected to the side of the air supply mechanism (2) on the side away from the processing mechanism (6); The air supply mechanism (2) comprises a fixed plate (201) for support, the interior of the fixed plate (201) is fixedly connected to the side of the gas pipe (3), the side of the gas pipe (3) is fixedly connected to a central partition (208), the side of the central partition (208) is provided with an exhaust hole (209), and the side of the central partition (208) is fixedly connected to a second gas pipe (207) and a first gas pipe (205), the side of the second gas pipe (207) away from the central partition (208) is fixedly connected to an inner partition (206), and the first gas pipe (2 05) A middle partition tube (204) is fixedly connected to the side away from the central partition tube (208), a swirl fan (203) is movably connected to the side of the central partition tube (208) away from the gas pipe (3), an outer fixed tube (202) is movably connected to the side of the swirl fan (203), the outer fixed tube (202) is located on the outside of the middle partition tube (204), the top of the gas pipe (3) is fixedly connected to the air intake pipe (4), a side of the fixed plate (201) is provided with a avoidance groove compatible with the adjustment mechanism (11), and a gas hole is provided on the side of the air intake pipe (4); The gas holes on the side of the air inlet pipe (4) are arranged in three groups, and the three groups of gas holes are respectively located between the outer fixed cylinder (202) and the middle partition cylinder (204), between the middle partition cylinder (204) and the first air pipe (205), and between the inner partition cylinder (206) and the central partition cylinder (208) from top to bottom.

2. The ultra-low nitrogen burner for staged combustion of gas according to claim 1, characterized in that: A lower discharge pipe (8) is fixedly connected to the bottom end of the treatment mechanism (6) away from the side of the generator (10); the lower discharge pipe (8) is located inside the purification tank (9), and the bottom end of the lower discharge pipe (8) is located below the water surface of the purification tank (9); the return pipe (7) and the lower discharge pipe (8) are located at the farthest end of the treatment mechanism (6) away from the generator (10).

3. The ultra-low nitrogen burner for staged combustion of gas according to claim 1, characterized in that: The exhaust holes (209), the second air pipe (207) and the first air pipe (205) are all arranged in six groups, and the angles between the six groups of the exhaust holes (209), the second air pipe (207) and the first air pipe (205) are all sixty degrees, and all the exhaust holes (209), the second air pipe (207) and the first air pipe (205) are distributed at equal angles on the side of the central partition tube (208).

4. The ultra-low nitrogen burner for staged combustion of gas according to claim 1, characterized in that: The regulating mechanism (11) comprises a fixed shaft (111) fixed inside the air intake pipe (4); a rotating plate (112) is movably sleeved on the side of the fixed shaft (111); a movable plate (113) is provided at the bottom end of the rotating plate (112); a limiting hole matched with a limiting rod (114) is provided on the side of the movable plate (113) away from the rotating plate (112); and a spring (115) is provided on the side of the limiting rod (114).

5. The ultra-low nitrogen burner for staged combustion of gas according to claim 4, characterized in that: When the movable plate (113) is pushed out by the spring (115), the bottom end of the rotating plate (112) is located below the gas hole on the side of the air intake pipe (4); when the side of the rotating plate (112) is away from the fixed shaft (111) and contacts the inside of the air intake pipe (4), the rotating plate (112) seals the bottom end of the air intake pipe (4).

6. The ultra-low nitrogen burner for staged combustion of gas according to claim 1, characterized in that: The side of the return pipe (7) close to the outer fixed cylinder (202) is fixedly connected to an arc-shaped circular tube (701), and the side of the arc-shaped circular tube (701) close to the swirl fan (203) is fixedly connected to a gas branch pipe (702), the outlet of the gas branch pipe (702) is arranged on the outer side of the outer fixed cylinder (202), and the number of the gas branch pipes (702) is eight.

7. The ultra-low nitrogen burner for staged combustion of gas according to claim 1, characterized in that: The processing mechanism (6) comprises a diversion box (601) capable of accommodating exhaust gas, wherein the bottom end of the diversion box (601) is fixedly connected to a support plate (602), the top end of the support plate (602) is movably connected to a rotating shaft (603), one side of the rotating shaft (603) is fixedly connected to a filter plate (605), the other side of the rotating shaft (603) is fixedly connected to a generator (10), and the side of the rotating shaft (603) is fixedly connected to a first bevel gear (606).

8. The ultra-low nitrogen burner for staged combustion of gas according to claim 7, characterized in that: The side of the first bevel tooth (606) is meshed with a second bevel tooth (607), and the side of the second bevel tooth (607) away from the first bevel tooth (606) is fixedly connected with a blade (608), the interior of the diversion box (601) is fixedly connected with the first bevel tooth (606), the side of the filter plate (605) close to the scraper plate (604) is in contact with the scraper plate (604), and the length of the scraper plate (604) is greater than the diameter of the filter plate (605).

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