Self-decoking biomass gas multi-channel burner

Abstract

The present invention relates to the technical field of burners, and more specifically, to a self-decoking biomass gas multi-channel burner. It includes a decoking pipe, and a decoking mechanism is connected to one end of the gas chamber body away from the air conveying mechanism. During the operation of the burner, the decoking mechanism is used to push the decoking pipe to slide inside the biomass gas injection pipe for decoking, and at the same time, it is also used to balance the internal pressure of the gas bin. The present invention controls the piston rod and the connecting rod through the telescopic cylinder body to push the decoking pipe to slide inside the biomass gas injection pipe for scraping and decoking. During the decoking process, the porous structure of the decoking pipe can concentrate the tar attached to the inner wall of the biomass gas injection pipe. At the same time, the piston rod and the connecting rod slide inside the gas bin, which can balance the pressure inside the gas bin without affecting the normal conveying work of other gas injection pipes.

Description

Technical Field

[0001] The invention relates to the technical field of burners, in particular to a self-decoking biomass gas multi-channel burner. Background Art

[0002] With the rapid consumption of material energy, the increasing demand and its limited nature, coupled with the large amount of , (sulfur oxides), (Nitrogen oxides) and other gases cause environmental problems such as atmospheric smoke, acid rain, global warming, and ozone layer depletion. People began to think deeply, and the search for efficient and clean energy once again became the focus of attention;

[0003] Biomass gas is rich in resources, cheap, renewable, and clean. Biomass gas needs to be generated by mixing gas and air with a biomass burner. In the biomass burner, a multi-channel gas injection pipe is often used to transport the gas, which is then mixed with the air at the front air distribution plate of the wind chamber through a swirl vane. The mixed gas then enters the combustion chamber for combustion.

[0004] However, the overall temperature of the biomass burner is relatively high. In the section of the gas injection pipe about 30 cm close to the gas chamber, tar is accumulated and attached to the inner wall of the injection pipe. If it is not cleaned in time, it will seriously affect the gas output and combustion conditions, and even block the gas and force the gas to stop, resulting in the biomass gas burner being unable to operate continuously and stably.

[0005] In view of this, a self-decoking biomass gas multi-channel burner is proposed. Summary of the invention

[0006] The object of the present invention is to provide a self-decoking biomass gas multi-channel burner to solve the problems raised in the above background technology.

[0007] To achieve the above object, the present invention provides a self-decoking biomass gas multi-channel burner, comprising a gas chamber body, the top of the gas chamber body is connected to a gas inlet pipe, the gas inlet pipe is used to transport the gas to the inside of the gas chamber body, the inside of the gas chamber body forms a gas bunker, one side of the gas bunker is provided with an air delivery mechanism;

[0008] The air delivery mechanism comprises an air distribution plate at the front end of the air chamber and a sealing plate at the rear end of the air chamber, the air distribution plate at the front end of the air chamber and the sealing plate at the rear end of the air chamber are fixedly connected through a pipeline, the sealing plate at the rear end of the air chamber is fixedly connected to the inner wall of the gas bunker, an air chamber is formed between the air distribution plate at the front end of the air chamber, the sealing plate at the rear end of the air chamber and the pipeline, a biomass gas injection pipe is fixedly connected to the inside of the air chamber, sixteen biomass gas injection pipes are provided, sixteen injection holes are opened on the surface of the sealing plate at the rear end of the air chamber, and the sixteen biomass gas injection pipes are all connected to the gas bunker through the injection holes;

[0009] A decoking tube is slidably arranged inside one end of each of the sixteen biomass gas injection pipes close to the rear end sealing plate of the wind chamber, and a decoking mechanism is connected to the end of the gas chamber body away from the air delivery mechanism. During the operation of the burner, the decoking tube is combined with the inner wall of the biomass gas injection pipe to form a "Venturi structure". When there is too much tar on the inner wall of the biomass gas injection pipe, the decoking mechanism is used to push the decoking tube to slide inside the biomass gas injection pipe to decoke. At the same time, the decoking mechanism is also used to balance the internal pressure of the gas bin.

[0010] As a further improvement of the present technical solution, the air delivery mechanism also includes an air delivery pipe sealed and installed on the surface of the pipeline, the air delivery pipe is connected to the air chamber, the end of the air delivery pipe away from the pipeline is connected to a blower, the sixteen biomass gas injection pipes are provided with a rotatable spoiler fan at one end away from the sealing plate at the rear end of the air chamber, and the side walls of the sixteen biomass gas injection pipes at one end close to the air distribution plate at the front end of the air chamber are provided with delivery holes.

[0011] As a further improvement of the technical solution, the decoking mechanism includes a protective tube, which is fixedly connected to a side of the gas chamber body away from the rear end sealing plate of the wind chamber, and sixteen protective holes are opened inside the protective tube, and connecting rods are slidably provided inside the sixteen protective holes, and sixteen telescopic cylinder bodies are provided at one end of the protective tube away from the gas chamber body, and the other side of the sixteen telescopic cylinder bodies is fixed by a cylinder support plate, and piston rods are slidably provided inside the sixteen telescopic cylinder bodies, and the ends of the sixteen piston rods away from the telescopic cylinder bodies are respectively connected to the sixteen connecting rods.

[0012] As a further improvement of the present technical solution, the ends of the sixteen connecting rods away from the piston rod are fixedly connected to a magnetic front protrusion, and the inner walls of the sixteen decoking tubes on one side close to the gas bin are fixedly connected to a magnetic support ring, and the inner wall of the magnetic support ring is magnetically fitted to the surface of the magnetic front protrusion.

[0013] As a further improvement of the technical solution, multiple decoking holes are opened on both sides and the top of the sixteen decoking tubes, and one end of the multiple decoking holes close to the outer wall of the decoking tube is fixedly connected with a decoking scraper, and the surfaces of the multiple decoking scrapers are in contact with the inner wall of the biomass gas injection pipe.

[0014] As a further improvement of the technical solution, the inner walls of the lower ends of the sixteen decoking tubes are fixedly connected with counterweights.

[0015] As a further improvement of the technical solution, the bottom of the inner wall of the sixteen decoking tubes are all inclined, and one end of the inner wall of the sixteen decoking tubes close to the air distribution plate at the front end of the wind chamber is lower than one end of the decoking tube close to the sealing plate at the rear end of the wind chamber.

[0016] As a further improvement of the technical solution, the inner diameters of the sixteen biomass gas injection pipes at one end close to the sealing plate at the rear end of the wind chamber are all smaller than the inner diameter of the biomass gas injection pipes at one end close to the air distribution plate at the front end of the wind chamber.

[0017] As a further improvement of the technical solution, sealing rings are installed at the openings of the sixteen protective holes on one side close to the gas bin, and the sealing rings are made of elastic material.

[0018] As a further improvement of the technical solution, an observation tube is fixedly connected to the outer wall of the gas chamber body.

[0019] Compared with the prior art, the present invention has the following beneficial effects:

[0020] In the self-decoking biomass gas multi-channel burner, a decoking tube is arranged inside the biomass gas injection tube, and combined with the internal structure of the biomass gas injection tube, a Venturi structure is formed inside the biomass gas injection tube as a whole. According to the Venturi effect, the fluid flow rate will be accelerated at the connection between the small pipe and the large pipe, and the pressure will be reduced. This increase in flow rate can improve the gas transmission efficiency;

[0021] When the biomass gas injection pipe needs to be detarred, the telescopic cylinder body is used to control the piston rod and the connecting rod, so that the connecting rod can pass through the gas bin and connect with the corresponding decoking pipe, and push the decoking pipe to slide inside the biomass gas injection pipe for scraping and decoking. During the decoking process, the porous structure of the decoking pipe can concentrate the tar attached to the inner wall of the biomass gas injection pipe, and flow and remove it from the bottom of the inner wall of the biomass gas injection pipe. At the same time, the piston rod and the connecting rod slide inside the gas bin to balance the pressure inside the gas bin. During the decoking process of one biomass gas injection pipe, the normal transportation work of other biomass gas injection pipes is not affected. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Figure 1It is a schematic diagram of the overall structure of the present invention;

[0023] Figure 2 It is a schematic diagram of the overall decomposition structure of the present invention;

[0024] Figure 3 It is a schematic diagram of the gas transmission cutaway structure of the present invention;

[0025] Figure 4 It is a structural schematic diagram of the decoking process of the present invention;

[0026] Figure 5 For the present invention Figure 4 A schematic diagram of the structure at A;

[0027] Figure 6 This is a schematic diagram of the internal structure of the biomass gas injection pipe of the present invention;

[0028] Figure 7 It is a schematic diagram of the connection structure between the connecting rod and the decoking tube of the present invention;

[0029] Figure 8 It is a schematic diagram of the tar flow structure of the present invention;

[0030] Fig. 9 It is a schematic diagram of the fuel gas transportation state in the biomass fuel gas injection pipe of the present invention.

[0031] The meaning of each number in the figure is:

[0032] 1. Gas chamber body; 11. Gas inlet pipe; 12. Gas chamber; 13. Biomass gas injection pipe; 14. Decoking pipe;

[0033] 2. Air delivery mechanism; 21. Sealing plate at the rear end of the air chamber; 211. Injection hole; 22. Air distribution plate at the front end of the air chamber; 23. Air chamber; 24. Air delivery pipe; 25. Delivery hole; 26. Turbine fan;

[0034] 3. Decoking mechanism; 30. Protective tube; 31. Connecting rod; 32. Protective hole; 33. Telescopic cylinder body; 34. Piston rod; 35. Cylinder support plate; 36. Magnetic front protrusion; 37. Magnetic support ring; 38. Decoking hole; 39. Decoking scraper;

[0035] 4. Observation tube;

[0036] 5. Sealing ring;

[0037] 6. Counterweight. DETAILED DESCRIPTION

[0038] The following will be combined with the accompanying drawings in the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0039] For examples, see Figure 1 and Figure 2 As shown, the purpose of this embodiment is to provide a self-decoking biomass gas multi-channel burner, including a gas chamber body 1, a gas inlet pipe 11 is connected to the top of the gas chamber body 1, and the gas inlet pipe 11 is used to transport the gas to the inside of the gas chamber body 1, and a gas bunker 12 is formed inside the gas chamber body 1, and an air conveying mechanism 2 is arranged on one side of the gas bunker 12;

[0040] The air conveying mechanism 2 includes an air distribution plate 22 at the front end of the air chamber and a sealing plate 21 at the rear end of the air chamber. The air distribution plate 22 at the front end of the air chamber and the sealing plate 21 at the rear end of the air chamber are fixedly connected through a pipeline. The sealing plate 21 at the rear end of the air chamber is fixedly connected to the inner wall of the gas bunker 12. An air chamber 23 is formed between the air distribution plate 22 at the front end of the air chamber, the sealing plate 21 at the rear end of the air chamber and the pipeline. A biomass gas injection pipe 13 is fixedly connected inside the air chamber 23. Sixteen biomass gas injection pipes 13 are provided. Sixteen injection holes 211 are opened on the surface of the sealing plate 21 at the rear end of the air chamber. The sixteen biomass gas injection pipes 13 are all connected to the gas bunker 12 through the injection holes 211.

[0041] A decoking tube 14 is slidably provided inside one end of each of the sixteen biomass gas injection pipes 13 near the rear end sealing plate 21 of the wind chamber, and a decoking mechanism 3 is connected to the end of the gas chamber body 1 away from the air delivery mechanism 2. During the operation of the burner, the decoking tube 14 combines with the inner wall of the biomass gas injection pipe 13 to form a "Venturi structure". When there is too much tar on the inner wall of the biomass gas injection pipe 13, the decoking mechanism 3 is used to push the decoking tube 14 to slide inside the biomass gas injection pipe 13 to decoke. At the same time, the decoking mechanism 3 is also used to balance the internal pressure of the gas bin 12.

[0042] When biomass gas is generated, it is necessary to mix the gas and air first, and then burn the mixed gas and air. Therefore, in the burner, after the gas is transported, the air needs to be transported with the help of an air transport mechanism 2. The air transport mechanism 2 also includes an air transport pipe 24 sealed and installed on the surface of the pipeline. The air transport pipe 24 is connected to the air chamber 23. A blower is connected to the end of the air transport pipe 24 away from the pipeline. A spoiler 26 is rotatably arranged inside the ends of the sixteen biomass gas injection pipes 13 away from the sealing plate 21 at the rear end of the air chamber. A delivery hole 25 is provided on the side wall of the end of the sixteen biomass gas injection pipes 13 close to the air distribution plate 22 at the front end of the air chamber.

[0043] like Figure 2 and Figure 3 As shown, the air to be mixed with the gas is driven by a blower and enters the interior of the air chamber 23 from the air delivery pipe 24, wherein the gas is driven by the pipeline booster fan before entering the gas inlet pipe 11, and both the gas and the air are continuously delivered. Since the interior of the gas bin 12 is connected to the biomass gas injection pipe 13, the gas will be injected and delivered from the biomass gas injection pipe 13 after entering the gas bin 12, and a delivery hole 25 is provided inside the end of the biomass gas injection pipe 13 away from the gas bin 12. The provision of the delivery hole 25 enables the air chamber 23 to be connected to the end of the biomass gas injection pipe 13, so that the air inside the air chamber 23 can enter the biomass gas injection pipe 13 from the delivery hole 25;

[0044] The delivery of gas can drive the turbulent fan 26 inside the biomass gas injection pipe 13 to rotate. The reason is that the gas has a certain kinetic energy and speed when flowing in the biomass gas injection pipe 13. When the gas passes through the turbulent fan 26, its impact force acts on the blades of the turbulent fan 26, pushing the turbulent fan 26 to rotate. During the rotation of the turbulent fan 26, the gas and air near it will be stirred to make the two fully mixed. Since the gas is continuously delivered, it will continue to provide power to maintain the rotation and mixing process of the turbulent fan 26. At the same time, the delivery of gas will form a certain pressure in the biomass gas injection pipe 13. This pressure will push the mixed gas and air to flow to the end of the biomass gas injection pipe 13, and finally be discharged from the end.

[0045] The overall temperature of the burner is relatively high when it is running. Inside the biomass gas injection pipe 13, tar accumulates and adheres to the inner wall of the biomass gas injection pipe 13, which is very serious. Therefore, a decoking mechanism 3 is required to decoke the inner wall of the biomass gas injection pipe 13. The decoking mechanism 3 includes a protective tube 30, which is fixedly connected to the side of the gas chamber body 1 away from the rear end sealing plate 21 of the wind chamber. Sixteen protective holes 32 are opened inside the protective tube 30, and connecting rods 31 are slidably arranged inside the sixteen protective holes 32. Sixteen telescopic cylinder bodies 33 are arranged at one end of the protective tube 30 away from the gas chamber body 1, and the other side of the sixteen telescopic cylinder bodies 33 is fixed by a cylinder support plate 35. Piston rods 34 are slidably arranged inside the sixteen telescopic cylinder bodies 33, and the ends of the sixteen piston rods 34 away from the telescopic cylinder bodies 33 are respectively connected to the sixteen connecting rods 31.

[0046] The ends of the sixteen connecting rods 31 away from the piston rod 34 are fixedly connected to the magnetic front protrusions 36, and the inner walls of the sixteen decoking tubes 14 on one side close to the gas bin 12 are fixedly connected to the magnetic support rings 37, and the inner walls of the magnetic support rings 37 are magnetically fitted to the surfaces of the magnetic front protrusions 36.

[0047] Multiple decoking holes 38 are opened on both sides and the top of the sixteen decoking tubes 14, and one end of the multiple decoking holes 38 close to the outer wall of the decoking tube 14 is fixedly connected to a decoking scraper 39, and the surfaces of the multiple decoking scrapers 39 are in contact with the inner wall of the biomass gas injection pipe 13.

[0048] There are sixteen biomass gas injection pipes 13. In order not to affect the normal operation of the burner, the sixteen biomass gas injection pipes 13 are used for decoking work alone. Figure 4 It can be seen that the openings of the sixteen biomass gas injection pipes 13 on one side close to the gas bin 12 correspond to the sixteen protective holes 32 respectively. When the biomass gas injection pipe 13 needs to be decoked, the corresponding telescopic cylinder body 33 is started to drive the piston rod 34 inside it to slide toward the gas bin 12, thereby driving the connecting rod 31 connected to the end of the piston rod 34 to pass through the gas bin 12 and connect with the decoking pipe 14. With the operation of the telescopic cylinder body 33, the decoking pipe 14 is pushed to slide inside the biomass gas injection pipe 13 in combination with the connecting rod 31, and the tar is scraped off the inner wall of the biomass gas injection pipe 13 with the help of the decoking scraper 39 installed on the outer wall of the decoking pipe 14;

[0049] like Figure 7 and Figure 8As shown, decoking holes 38 are provided at the tops of both sides of the decoking tube 14, and the bottom end of the inner wall of the decoking tube 14 is in a solid state, so that the tar scraped by the decoking scraper 39 can enter the interior of the decoking tube 14 from the decoking holes 38. During the pushing process, the bottom of the decoking tube 14 and the inner wall of the biomass gas injection pipe 13 produce friction. Due to the effect of friction, relative movement and interaction force will occur between the molecules on the contact surface. This interaction increases the kinetic energy of the molecules, thereby causing the temperature of the contact surface to rise. Combined with the overall heat of the burner, the bottom end of the decoking tube 4 can be heated up, thereby improving the fluidity of the tar entering the decoking tube 14. When the decoking tube 14 is pushed to the vicinity of the turbulent fan 26, combined with the fluidity of the tar, the tar can flow out from the bottom of the turbulent fan 26 without affecting the operation of the turbulent fan 26. After the tar flows out of the biomass gas injection pipe 13, it will enter the combustion chamber and burn together with the mixed gas and air.

[0050] It should be noted that: Figure 8 The dot-dashed arrows in the figure indicate the flow direction of the tar.

[0051] Under normal circumstances, multiple biomass gas injection pipes 13 jointly transport gas, and the gas pressure in the gas bin 12 is in a relatively balanced state. However, when one of the biomass gas injection pipes 13 stops transporting gas due to decoking, the gas output channel in the gas bin 12 is reduced. If the gas continues to be transported, the pressure inside the gas bin 12 will be unbalanced. Figure 4 As the connecting rod 31 and the piston rod 34 slide, the threaded structure on their surface can generate a turbulent flow around the opening of the biomass gas injection pipe 13 where gas cannot be transported, thereby improving the pressure distribution in the gas bin 12 to a certain extent and improving the stability and reliability of gas transportation.

[0052] Among them, combined Figure 7 As shown, the connection between the connecting rod 31 and the decoking tube 14 is through the connection between the magnetic front protrusion 36 and the magnetic support ring 37. When the connecting rod 31 is inserted into the interior of the decoking tube 14, the magnetic front protrusion 36 can be adsorbed on the interior of the magnetic support ring 37. After decoking is completed, the connecting rod 31 can drive the decoking tube 14 to return to its original position through magnetic attraction. It should be noted that the size setting of the magnetic support ring 37 will not affect the transportation of the gas.

[0053] Considering the stability of the decoking tubes 14 during gas transportation, the inner walls of the lower ends of the sixteen decoking tubes 14 are fixedly connected with counterweights 6 .

[0054] The improvement lies in that the setting of the counterweight 6 increases the weight of the lower end of the decoking tube 14, so that the center of gravity of the decoking tube 14 moves downward, reducing the displacement of the decoking tube 14 under the action of the gas flow, ensuring that the decoking tube 14 can stably perform the decoking operation, and also helping to reduce the adverse effects on the gas transportation system caused by the instability of the decoking tube 14.

[0055] Since tar will be concentrated inside the decoking tube 14 when the decoking tube 14 is scraping and decoking, in order to allow the tar to flow out of the decoking tube 14 smoothly after decoking is completed, the bottom of the inner wall of the sixteen decoking tubes 14 is in an inclined state, and the end of the inner wall of the sixteen decoking tubes 14 close to the air distribution plate 22 at the front end of the wind chamber is lower than the end of the decoking tube 14 close to the sealing plate 21 at the rear end of the wind chamber.

[0056] The improvements are: See Figure 8 As shown, the inclined design of the bottom of the inner wall of the decoking tube 14 allows the tar to flow naturally in a specific direction under the action of gravity, so that after the decoking operation is completed, the tar can flow out of the decoking tube 14 more smoothly and be discharged from the bottom of the spoiler fan 26. It should be noted that even if the tar stays inside the biomass gas injection pipe 13, when the biomass gas injection pipe 13 resumes gas transportation, the tar can be brought out of the inside of the biomass gas injection pipe 13 with the help of the gas transportation thrust.

[0057] The inner diameters of the sixteen biomass gas injection pipes 13 at one end close to the sealing plate 21 at the rear end of the wind chamber are all smaller than the inner diameter of the biomass gas injection pipes 13 at one end close to the air distribution plate 22 at the front end of the wind chamber.

[0058] The improvement is: Fig. 9 As shown, the surface of the decoking tube 14 can be magnetically connected to the inner wall of the biomass gas injection tube 13 to fix the placement of the decoking tube 14 (the magnetic attraction here is smaller than the magnetic attraction effect of the magnetic front protrusion 36 and the magnetic support ring 37). Since the inner diameter of the decoking tube 14 is smaller than the inner wall of the biomass gas injection tube 13, when the gas passes through the decoking tube 14 in the biomass gas injection tube 13, the gas flows from the end with a larger inner diameter to the end with a smaller inner diameter. According to the Venturi effect, the fluid flow rate will be accelerated in a narrow place, and the pressure will be reduced. Such a structure is conducive to increasing the flow rate of the gas.

[0059] Considering the sealing condition inside the gas bunker 12 , sealing rings 5 ​​are installed at the openings of the sixteen protective holes 32 close to one side of the gas bunker 12 , and the sealing rings 5 ​​are made of elastic material.

[0060] The improvements are: See Figure 5As shown, the installation of the sealing ring 5 (preferably made of rubber material) can effectively reduce the leakage of gas from the connection between the protective hole 32 and the connecting rod 31 or the piston rod 34. The sealing ring 5 can fit tightly between the opening of the protective hole 32 and the moving parts to reduce the escape of gas. In this way, the pressure inside the gas bin 12 can be maintained stable, and the outside air can be reduced from entering the gas bin 12 to affect the quality and combustion performance of the gas.

[0061] In order to accurately observe the decoking operation and the gas transportation situation, an observation tube 4 is fixedly connected to the outer wall of the gas chamber body 1 .

[0062] The setting of the observation tube provides an intuitive window for the operator, so that the operator can monitor the progress of the decoking operation and the transportation status of the gas in the gas chamber body 1 in real time, which helps to promptly discover possible problems in the decoking operation, such as incomplete decoking, pipeline blockage, etc., and take corresponding measures to adjust and deal with them. At the same time, observation of the gas transportation situation can also ensure the normal supply of gas and ensure the stable operation of the entire system.

[0063] in, Figure 3 , Figure 4 and Fig. 9 The hollow arrow in the figure indicates the direction of gas delivery; Figure 4 The solid arrow in refractory FIG. 1 indicates the pushing direction of the decoking tube 14 .

[0064] In summary, the working principle of this scheme is as follows: the air to be mixed with the gas is delivered to the air chamber 23 through the blower, and the gas is driven by the pipeline booster fan before entering the gas inlet pipe 11, and the gas and air are continuously delivered. Since the interior of the gas bin 12 is connected to the biomass gas injection pipe 13, the gas will be injected and delivered from the biomass gas injection pipe 13 after entering the gas bin 12, and a delivery hole 25 is provided inside the end of the biomass gas injection pipe 13 away from the gas bin 12. The setting of the delivery hole 25 makes the air chamber 23 connected with the end of the biomass gas injection pipe 13, so that the air inside the air chamber 23 can enter the biomass gas injection pipe 13 from the delivery hole 25. When the gas passes through the decoking pipe 14 in the biomass gas injection pipe 13, the gas flows from the end with a larger inner diameter to the end with a smaller inner diameter. According to the Venturi effect, the fluid flow rate will be accelerated in a narrow place, and the pressure will be reduced. Such a structure is conducive to increasing the flow rate of the gas.

[0065] The delivery of gas can drive the turbulent fan 26 inside the biomass gas injection pipe 13 to rotate. During the rotation of the turbulent fan 26, the gas and air near it will be stirred to fully mix the two. Since the gas is continuously delivered, it will continue to provide power to maintain the rotation and mixing process of the turbulent fan 26. At the same time, the delivery of gas will form a certain pressure in the biomass gas injection pipe 13. This pressure will push the mixed gas and air to flow to the end of the biomass gas injection pipe 13, and finally be discharged from the end;

[0066] When the biomass gas injection pipe 13 needs to be decoked, the corresponding telescopic cylinder body 33 is started to drive the piston rod 34 inside it to slide toward the gas bin 12, thereby driving the connecting rod 31 connected to the end of the piston rod 34 to pass through the gas bin 12 and connect with the decoking pipe 14. As the telescopic cylinder body 33 runs, the decoking pipe 14 is pushed to slide inside the biomass gas injection pipe 13 in combination with the connecting rod 31, and the tar is scraped off the inner wall of the biomass gas injection pipe 13 with the help of the decoking scraper 39 installed on the outer wall of the decoking pipe 14. Decoking holes 38 are provided at the top of both sides of the decoking tube 14, and the bottom end of the inner wall of the decoking tube 14 is in a solid state, so that the tar scraped by the decoking scraper 39 can enter the interior of the decoking tube 14 from the decoking holes 38. When the decoking tube 14 is pushed close to the spoiler fan 26, combined with the fluidity of the tar, the tar can flow out from the bottom of the spoiler fan 26 without affecting the operation of the spoiler fan 26. After the tar flows out of the biomass gas injection pipe 13, it will enter the combustion chamber and burn together with the mixed gas and air.

[0067] The above shows and describes the basic principles, main features and advantages of the present invention. Those skilled in the art should understand that the present invention is not limited by the above embodiments. The above embodiments and descriptions are only preferred examples of the present invention and are not intended to limit the present invention. Without departing from the spirit and scope of the present invention, the present invention may have various changes and improvements, which fall within the scope of the present invention. The scope of protection of the present invention is defined by the attached claims and their equivalents.

Claims

1. A self-decoking biomass gas multi-channel burner, comprising a gas chamber body (1), the top of the gas chamber body (1) being connected to a gas inlet pipe (11), the gas inlet pipe (11) being used to transport gas to the interior of the gas chamber body (1), characterized in that: A gas chamber (12) is formed inside the gas chamber body (1), and an air conveying mechanism (2) is provided on one side of the gas chamber (12); The air conveying mechanism (2) comprises an air distribution plate (22) at the front end of the air chamber and a sealing plate (21) at the rear end of the air chamber, the air distribution plate (22) at the front end of the air chamber and the sealing plate (21) at the rear end of the air chamber are fixedly connected via a pipeline, the sealing plate (21) at the rear end of the air chamber is fixedly connected to the inner wall of the gas bin (12), an air chamber (23) is formed between the air distribution plate (22) at the front end of the air chamber, the sealing plate (21) at the rear end of the air chamber and the pipeline, a biomass gas injection pipe (13) is fixedly connected to the inside of the air chamber (23), sixteen biomass gas injection pipes (13) are provided, sixteen injection holes (211) are provided on the surface of the sealing plate (21) at the rear end of the air chamber, and the sixteen biomass gas injection pipes (13) are all connected to the gas bin (12) via the injection holes (211); A decoking tube (14) is slidably provided inside each of the sixteen biomass gas injection pipes (13) at one end close to the rear end sealing plate (21) of the wind chamber, and a decoking mechanism (3) is connected to one end of the gas chamber body (1) away from the air conveying mechanism (2). During the operation of the burner, the decoking tube (14) is combined with the inner wall of the biomass gas injection pipe (13) to form a Venturi structure. When there is too much tar on the inner wall of the biomass gas injection pipe (13), the decoking mechanism (3) is used to push the decoking tube (14) to slide inside the biomass gas injection pipe (13) to remove tar. At the same time, the decoking mechanism (3) is also used to balance the internal pressure of the gas bin (12); The decoking mechanism (3) comprises a protective tube (30), the protective tube (30) being fixedly connected to a side of a combustion chamber body (1) away from a sealing plate (21) at the rear end of a wind chamber, the protective tube (30) being provided with sixteen protective holes (32), the sixteen protective holes (32) being slidably provided with connecting rods (31), the protective tube (30) being provided with sixteen telescopic cylinder bodies (33) at one end away from the combustion chamber body (1), the other side of the sixteen telescopic cylinder bodies (33) being fixed by a cylinder support plate (35), the sixteen telescopic cylinder bodies (33) being slidably provided with piston rods (34), the ends of the sixteen piston rods (34) being away from the telescopic cylinder bodies (33) being respectively connected to sixteen connecting rods (31), the connecting rods (31) having a threaded structure on their surfaces, capable of generating turbulence around the opening of the biomass gas injection pipe (13).

2. The self-decoking biomass gas multi-channel burner according to claim 1 is characterized in that: The air delivery mechanism (2) further comprises an air delivery pipe (24) sealed and mounted on the surface of the pipeline, the air delivery pipe (24) being connected to the air plenum (23), the end of the air delivery pipe (24) away from the pipeline being connected to a blower, the ends of the sixteen biomass gas injection pipes (13) away from the sealing plate (21) at the rear end of the plenum being provided with a rotatable spoiler fan (26) inside, and the side walls of the sixteen biomass gas injection pipes (13) at one end close to the air distribution plate (22) at the front end of the plenum being provided with a delivery hole (25).

3. The self-decoking biomass gas multi-channel burner according to claim 1, characterized in that: The ends of the sixteen connecting rods (31) away from the piston rod (34) are fixedly connected to a magnetic front protrusion (36), and the inner walls of the sixteen decoking tubes (14) on one side close to the gas bin (12) are fixedly connected to a magnetic support ring (37), and the inner wall of the magnetic support ring (37) is magnetically fitted to the surface of the magnetic front protrusion (36).

4. The self-decoking biomass gas multi-channel burner according to claim 3 is characterized in that: A plurality of decoking holes (38) are provided on both sides and the top of the sixteen decoking tubes (14); a decoking scraper (39) is fixedly connected to one end of the plurality of decoking holes (38) close to the outer wall of the decoking tube (14); and surfaces of the plurality of decoking scrapers (39) are in contact with the inner wall of the biomass fuel gas injection tube (13).

5. The self-decoking biomass gas multi-channel burner according to claim 4 is characterized in that: The inner walls of the lower ends of the sixteen decoking tubes (14) are all fixedly connected with counterweights (6).

6. The self-decoking biomass gas multi-channel burner according to claim 5, characterized in that: The bottoms of the inner walls of the sixteen decoking tubes (14) are all in an inclined state, and the ends of the inner walls of the sixteen decoking tubes (14) close to the air distribution plate (22) at the front end of the wind chamber are lower than the ends of the decoking tubes (14) close to the sealing plate (21) at the rear end of the wind chamber.

7. The self-decoking biomass gas multi-channel burner according to claim 1, characterized in that: The inner diameters of the sixteen biomass gas injection pipes (13) at one end close to the sealing plate (21) at the rear end of the wind chamber are all smaller than the inner diameter of the biomass gas injection pipes (13) at one end close to the air distribution plate (22) at the front end of the wind chamber.

8. The self-decoking biomass gas multi-channel burner according to claim 1, characterized in that: The sixteen protective holes (32) are all provided with sealing rings (5) at their openings on one side close to the gas storage bin (12), and the sealing rings (5) are made of elastic material.

9. The self-decoking biomass gas multi-channel burner according to claim 1, characterized in that: An observation tube (4) is fixedly connected to the outer wall of the gas chamber body (1).

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