Plasma burner

Abstract

The utility model discloses a plasma burner, which comprises a burner outer cylinder, the plasma generator comprises a sleeve inserted into the burner outer barrel, a first flow guide groove is formed in the sleeve, a cathode bar is arranged in the sleeve, and a second flow guide groove is formed in the cathode bar; the cooling component comprises a cooling box and further comprises a T-shaped pipe arranged in the sleeve, a first connecting pipe is arranged in the T-shaped pipe in a sealed mode, one end of the first connecting pipe is connected with the cathode bar and communicates with an inlet of the second flow guide groove, and the other end of the first connecting pipe is connected with a control component. The second connecting pipe is communicated with outlets of the first diversion trench and the second diversion trench; according to the utility model, when the anode ring and the cathode bar work, the insulation cooling medium exchanges heat with the anode ring and the cathode bar through the cooperation of the first diversion trench, the second diversion trench and the cooling component, so that the cooling is realized, the electrode is prevented from being overheated for a long time, the service life of the electrode is prolonged, and the electrifying efficiency is guaranteed.

Description

Technical Field

[0001] The utility model relates to the technical field of burners, in particular to a plasma burner. Background Art

[0002] A plasma burner is a device that uses plasma technology to achieve combustion. Plasma burners are often used in combustion processes such as boilers and industrial furnaces because of their combustion characteristics of full combustion and oil-free ignition, replacing the traditional oil ignition method that consumes a lot of fuel. Traditional ignition methods have the problem of incomplete fuel combustion, resulting in energy waste. Plasma burners use the characteristics of plasma to provide solutions to improve combustion efficiency and reduce pollutant emissions.

[0003] When a plasma burner is working, the anode block and the cathode block usually need to be powered for a long time in order to maintain the continuous generation of plasma. The anode block and the cathode block will generate significant heat due to high voltage and high current when working. Long-term overheating of the electrode will affect the electrode life and the power supply efficiency between the electrodes, and even damage the electrode. Therefore, the present application specifically proposes a plasma burner that can cool the electrode block when the electrode block is working. Utility Model Content

[0004] The main purpose of the utility model is to provide a plasma burner which can cool down the electrode block when the electrode block is working.

[0005] To achieve the above object, the utility model provides a plasma burner, comprising:

[0006] The burner outer cylinder comprises an "L"-shaped cylinder body consisting of a vertical end and a horizontal end, wherein the vertical end of the burner outer cylinder is an air inlet for receiving and transporting hot air with coal powder, and the horizontal end of the burner outer cylinder is an air outlet;

[0007] The plasma generator comprises a sleeve inserted into the burner outer cylinder along the length direction of the transverse end of the burner outer cylinder, the connection between the sleeve and the burner outer cylinder is sealed, and a first guide groove is provided in the cylinder wall of the sleeve, a cathode rod is movably provided in the sleeve, a second guide groove is provided in the cathode rod, and a plurality of ventilation grooves are provided at one end of the sleeve close to the air outlet;

[0008] A cooling component, comprising a cooling box storing an insulating cooling medium, and a water pump for pumping the insulating cooling medium in the cooling box into the first guide groove through a water inlet pipe; and also comprising a T-tube arranged in the sleeve, wherein the T-tube is located at one end of the cathode rod away from the air outlet and a gap is left between the T-tube and the cathode rod for the cathode rod to reciprocate in the sleeve, the vertical end of the T-tube is connected to the inlet of the first guide groove, the lateral end of the T-tube is dynamically sealed with a first connecting tube, the interior of the first connecting tube is hollow, and one end corresponding to the cathode rod is open to communicate with the inlet of the second guide groove, the other end of the cathode rod is closed, and a liquid inlet connected to the T-tube is opened at the position of the cathode rod corresponding to the T-tube;

[0009] It also includes a second connecting pipe arranged in the sleeve, one end of the second connecting pipe is connected to the outlet of the first guide groove, the other end of the second connecting pipe is connected to the outlet of the second guide groove through a third connecting pipe, and the third connecting pipe is dynamically sealed with the second connecting pipe; it also includes a return water pipe with one end connected to the second connecting pipe and the other end connected to the cooling box.

[0010] Furthermore, a switch valve is provided on the water inlet pipe, and a control component is provided on the sleeve. The control component is used to control the on and off state of the switch valve. When the cathode rod moves back and forth in the sleeve, it can drive the first connecting pipe to move and trigger the control component, thereby changing the on and off state of the switch valve.

[0011] Furthermore, the switch valve includes a valve body, the interior of the valve body is hollow, and interfaces connected to the water inlet pipe are arranged on both sides; the dynamic seal in the valve body is cooperated with a valve plate, and the valve plate is provided with through holes for connecting with the interfaces on both sides of the valve body, and the control component is used to control the valve plate to reciprocate in the valve body, so that the through holes are connected with the interfaces on both sides of the valve body and the interfaces on both sides of the valve body are blocked.

[0012] Furthermore, a contact sensor is provided on the valve body, and when the through hole is connected with interfaces on both sides of the valve body, the valve plate contacts the contact sensor;

[0013] It also includes a control processor, which is connected to the contact sensor and the water pump signal.

[0014] Further, the control component includes a valve stem extending into the valve body and connected to the valve plate, and also includes a hydraulic chamber arranged in the sleeve, one end of the first connecting pipe extends into the hydraulic chamber, and the end is provided with a push plate that cooperates with the hydraulic chamber in a dynamic seal;

[0015] The hydraulic chamber is connected to a push chamber at one end away from the first connecting pipe, one end of the valve stem extends into the push chamber and cooperates with the push chamber dynamic seal, and the hydraulic chamber is filled with a pressure transmission medium between the valve stem and the push plate.

[0016] Furthermore, the first guide groove and the second guide groove are spirally arranged in the corresponding sleeve and the cathode rod.

[0017] Furthermore, a combustion-supporting component is provided in the burner outer tube, and the combustion-supporting component includes a plurality of combustion tubes distributed between the sleeve and the air outlet of the burner outer tube, and the combustion tubes are arranged in sequence from the sleeve to the air outlet, and the diameters of the tubes are arranged from small to large.

[0018] Furthermore, a partition plate is provided in the air inlet of the burner outer tube, and the partition plate is "J"-shaped and corresponds to the curvature of the burner outer tube.

[0019] The beneficial effects of the utility model are embodied in:

[0020] In the utility model, when the anode ring and the cathode rod are working, the insulating cooling medium exchanges heat with the anode ring and the cathode rod through the cooperation between the first guide groove, the second guide groove and the cooling component, thereby achieving cooling, avoiding long-term overheating of the electrode, extending the service life of the electrode, and ensuring the power-on efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 It is a three-dimensional view of the front side of a plasma burner described in the utility model;

[0022] Figure 2 It is a cross-sectional view of a plasma burner described in the utility model;

[0023] Figure 3 yes Figure 3 Magnified view at A in the middle;

[0024] Figure 4 yes Figure 3 Magnified view of middle B;

[0025] Figure 5 yes Figure 3 Magnified view at center C.

[0026] Description of reference numerals:

[0027] 1. Burner outer tube; 11. Air inlet; 12. Air outlet; 13. Partition plate; 2. Plasma generator; 21. Sleeve; 211. First guide groove; 212. Ventilation groove; 22. Power unit; 23. Cathode rod; 231. Second guide groove; 24. Anode ring; 3. Cooling component; 31. Cooling box; 32. Water inlet pipe; 33. Water pump; 34. T-tube; 35. First connecting pipe; 36. Second connecting pipe; 37. Third connecting pipe; 38. Return pipe; 4. Switch valve; 41. Valve body; 42. Valve plate; 43. Through hole; 44. Contact sensor; 5. Control component; 51. Valve stem; 52. Hydraulic chamber; 53. Push plate; 54. Push chamber; 6. Combustion-supporting component; 61. Burner tube. Specific implementation plan

[0028] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. In the absence of conflict, the embodiments in this application and the features in the embodiments can be combined with each other.

[0029] See also Figure 1-Figure 5 .

[0030] The utility model discloses a plasma burner, comprising:

[0031] The burner outer cylinder 1 comprises an L-shaped cylinder body consisting of a vertical end and a horizontal end, and the vertical end of the burner outer cylinder 1 is an air inlet 11 for receiving and transporting hot air carrying coal powder, and the horizontal end of the burner outer cylinder 1 is an air outlet 12;

[0032] The plasma generator 2 comprises a sleeve 21 arranged in the burner outer cylinder 1 along the length direction of the transverse end of the burner outer cylinder 1, and one end of the sleeve 21 extends out of the burner outer cylinder 1 and is provided with a power unit 22. The connection between the sleeve 21 and the burner outer cylinder 1 is sealed, and a cathode rod 23 is also arranged in the sleeve 21. The end of the cathode rod 23 away from the air outlet 12 is connected to the moving end of the power unit 22. The power unit 22 is used to drive the cathode rod 23 to reciprocate along the length direction of the sleeve 21. The sleeve 21 An anode ring 24 is provided at one end near the air outlet 12, and a plurality of ventilation grooves 212 are also provided at one end of the sleeve 21 near the air outlet 12. The ventilation grooves 212 are used to introduce coal powder into the cathode rod 23 and the anode ring 24 for ionization reaction. A first guide groove 211 is also provided in the wall of the sleeve 21, and the first guide groove 211 passes through the installation place of the anode ring 24. A second guide groove 231 is provided in the cathode rod 23, and the second guide groove 231 passes through the end of the cathode rod 23 near the air outlet 12.

[0033] A cooling component 3, comprising a cooling box 31 storing an insulating cooling medium, and a water pump 33 for pumping the insulating cooling medium in the cooling box 31 into the first guide groove 211 through a water inlet pipe 32; and also comprising a T-tube 34 arranged in the sleeve 21, wherein the T-tube 34 is located at one end of the cathode rod 23 away from the air outlet 12 and a gap is left between the T-tube 34 and the cathode rod 23 for the cathode rod 23 to reciprocate in the sleeve 21, the vertical end of the T-tube 34 is connected to the inlet of the first guide groove 211, and the lateral end of the T-tube 34 is dynamically sealed with a first connecting tube 35, the interior of the first connecting tube 35 is hollow, and one end of the corresponding cathode rod 23 is open to communicate with the inlet of the second guide groove 231, and the other end of the cathode rod 23 is closed, and a liquid inlet connected to the T-tube 34 is opened at the position of the cathode rod 23 corresponding to the T-tube 34;

[0034] It also includes a second connecting pipe 36 arranged in the sleeve 21, one end of the second connecting pipe 36 is connected to the outlet of the first guide groove 211, and the other end of the second connecting pipe 36 is connected to the outlet of the second guide groove 231 through a third connecting pipe 37, and the third connecting pipe 37 is dynamically sealed with the second connecting pipe 36; it also includes a return water pipe 38, one end of which is connected to the second connecting pipe 36 and the other end is connected to the cooling box 31.

[0035] In a specific implementation, when preparing for ignition, the driving power unit 22 drives the cathode rod 23 close to the anode ring 24 and energizes each electrode. At this time, the end of the cathode rod 23 close to the air outlet 12 undergoes an ionization process with the anode ring 24 and generates plasma. The cathode rod 23 is then moved toward the power unit 22 to move the cathode rod 23 away from the anode ring 24. At this time, an arc is generated between the end of the cathode rod 23 close to the air outlet 12 and the anode ring 24. Hot air carrying coal powder is blown into the air inlet 11 of the burner outer tube 1. The coal powder around the sleeve 21 approaches and contacts the arc through the ventilation slots 212 and is ignited. The coal powder ignites each other to form a flame and is ejected from the air outlet 12 of the burner outer tube 1. When the cathode rod 23 moves toward the power unit 22, the cathode rod 23 drives the first connecting pipe 35 and the third connecting pipe 37 to move toward the power unit 22. The insulating cooling medium moves in the direction of element 22, at which time the first connecting pipe 35 is connected to the T-tube 34, the third connecting pipe 37 is connected to the second connecting pipe 36, a part of the insulating cooling medium flows into the first guide groove 211 through the water inlet pipe 32, and the remaining insulating cooling medium flows into the T-tube 34 and flows into the second guide groove 231 through the first connecting pipe 35. The insulating cooling medium flowing into the first guide groove 211 passes through the anode ring 24 and performs heat exchange, thereby cooling the anode ring 24. The insulating cooling medium after heat exchange is discharged from the outlet of the first guide groove 211, and the insulating cooling medium flowing into the second guide groove 231 passes through the end of the cathode rod 23 close to the air outlet 12 and performs heat exchange. The insulating cooling medium after heat exchange flows into the second connecting pipe 36 from the outlet of the second guide groove 231 and flows back to the cooling box 31 through the return pipe 38.

[0036] In the utility model, when the anode ring 24 and the cathode rod 23 are working, the insulating cooling medium exchanges heat with the anode ring 24 and the cathode rod 23 through the cooperation between the first guide groove 211, the second guide groove 231 and the cooling component 3, thereby achieving cooling, avoiding long-term overheating of the electrode, extending the life of the electrode, and ensuring the power-on efficiency.

[0037] Preferably, the power unit 22 can adopt a motor in the prior art.

[0038] Preferably, the insulating cooling medium may be insulating oil.

[0039] It should be noted that the plasma generator 2 is common knowledge to those skilled in the art, so its structure will not be described in detail here.

[0040] In one embodiment, a switch valve 4 is provided on the water inlet pipe 32, and a control component 5 is provided on the sleeve 21. The control component 5 is used to control the on and off state of the switch valve 4. When the cathode rod 23 reciprocates in the sleeve 21, it can drive the first connecting pipe 35 to move and trigger the control component 5, thereby changing the on and off state of the switch valve 4.

[0041] With this design, when the cathode rod 23 is not working, the control component 5 drives the switch valve 4 to close, and the water inlet pipe 32 is disconnected. When the cathode rod 23 is working, the control component 5 drives the switch valve 4 to open, and the water inlet pipe 32 is connected.

[0042] In one embodiment, the switch valve 4 includes a valve body 41, the interior of the valve body 41 is hollow, and interfaces connected to the water inlet pipe 32 are arranged on both sides; the dynamic seal in the valve body 41 is matched with a valve plate 42, and the valve plate 42 is provided with a through hole 43 for connecting with the interfaces on both sides of the valve body 41. The control component 5 is used to control the valve plate 42 to reciprocate in the valve body 41, so that the through hole 43 is connected with the interfaces on both sides of the valve body 41 and the interfaces on both sides of the valve body 41 are blocked.

[0043] With such a design, when the cathode rod 23 is not working, the switch valve 4 is closed, and the valve plate 42 blocks the water inlet pipe 32, thereby preventing the insulating cooling medium from flowing out of the water inlet pipe 32; when the cathode rod 23 is working, the switch valve 4 is opened, and the valve plate 42 moves in the valve body 41 until the through hole 43 and the water inlet pipe 32 are on the same axis. At this time, the water inlet pipe 32 is open, and the insulating cooling medium flows out of the water inlet pipe 32.

[0044] In one embodiment, a contact sensor 44 is disposed on the valve body 41 , and when the through hole 43 is connected to interfaces on both sides of the valve body 41 , the valve plate 42 contacts the contact sensor 44 ;

[0045] The system also includes a control processor, which is connected to the contact sensor 44 and the water pump 33 by signals.

[0046] With such a design, when the switch valve 4 is opened, the through hole 43 is connected with the interfaces on both sides of the valve body 41. At this time, the water inlet pipe 32 is connected, the valve plate 42 is in contact with the contact sensor 44, and the contact sensor 44 sends a start signal to the water pump 33 through the control processor. The water pump 33 pumps the insulating cooling medium into the water inlet pipe 32 and flows into the T-tube 34. When the switch valve 4 is closed, the valve plate 42 is no longer in contact with the contact sensor 44. At this time, the water pump 33 loses the signal and stops, and the valve plate 42 blocks the passage of the water inlet pipe 32, completing the closure of the cooling circuit.

[0047] In one embodiment, the control component 5 includes a valve stem 51 extending into the valve body 41 and connected to the valve plate 42, and also includes a hydraulic chamber 52 arranged in the sleeve 21, one end of the first connecting pipe 35 extends into the hydraulic chamber 52, and the end is provided with a push plate 53 that cooperates with the hydraulic chamber 52 in a dynamic seal;

[0048] The end of the hydraulic chamber 52 away from the first connecting pipe 35 is connected to the push chamber 54, one end of the valve stem 51 extends into the push chamber 54 and cooperates with the push chamber 54 in a dynamic seal. The hydraulic chamber 52 is filled with a pressure transmission medium between the corresponding valve stem 51 and the push plate 53.

[0049] With such a design, when the cathode rod 23 is working, the cathode rod 23 drives the first connecting tube 35 to move toward the power unit 22, and the push plate 53 moves together with the first connecting tube 35 and squeezes the pressure transmission medium in the hydraulic chamber 52, and the pressure transmission medium flows into the push chamber 54 and pushes the valve stem 51 upward, and the valve stem 51 drives the valve plate 42 to move upward until the water inlet pipe 32 is opened. When the cathode rod 23 is no longer working, the cathode rod 23 drives the push plate 53 to move toward the anode ring 24 through the first connecting tube 35, and the push plate 53 no longer squeezes the pressure transmission medium, and the pressure transmission medium flows back into the hydraulic chamber, and the valve stem 51 loses the thrust of the pressure transmission medium and slides downward, and the valve plate 42 moves downward together with the valve stem 51, and the cooling circuit is closed at this time.

[0050] Preferably, the pressure transmission medium can be a high temperature resistant medium such as water or a water-ethylene glycol mixture.

[0051] In one embodiment, the first guide groove 211 and the second guide groove 231 are spirally disposed in the corresponding sleeve 21 and cathode rod 23 .

[0052] With this design, the ends of the anode ring 24 and the cathode rod 23 close to the air outlet 12 are the main heat-generating parts, and the spiral design of the first guide groove 211 and the second guide groove 231 enables the insulating cooling medium to exchange heat with the heat-generating parts of the corresponding electrodes for a longer period of time, thereby improving the cooling efficiency.

[0053] In one embodiment, a combustion-supporting component 6 is provided in the burner outer tube 1, and the combustion-supporting component 6 includes a plurality of combustion tubes 61 distributed between the sleeve 21 and the air outlet 12 of the burner outer tube 1, and each combustion tube 61 is arranged in sequence from the sleeve 21 to the air outlet 12, and each tube diameter is set from small to large, and the combustion tube 61 is used to assist the combustion of coal powder.

[0054] With this design, when the coal powder near the sleeve 21 contacts the electric arc and is ignited, the flame will first ignite the coal powder in the combustion tube 61 closest to one end of the sleeve 21, thereby expanding the radius of the flame tongue with the center of the sleeve 21 as the center. The flame tongue ignites the coal powder in the corresponding combustion tube 61 in sequence along the direction from the sleeve 21 to the air outlet 12 until it is ejected from the burner outer tube 1, making the flame burn more fully and more evenly.

[0055] In one embodiment, a partition plate 13 is disposed in the air inlet 11 of the burner outer tube 1 . The partition plate 13 is “J”-shaped and corresponds to the curvature of the burner outer tube 1 .

[0056] With this design, when the pulverized coal enters the burner outer tube 1 , the partition plate 13 separates the pulverized coal at both ends of the partition plate 13 , reducing the accumulation of pulverized coal in the middle of the burner outer tube 1 and allowing the pulverized coal to be transported more evenly in the burner outer tube 1 .

[0057] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention shall be included in the protection scope of the present invention. In addition, "multiple", "multiple groups", and "several" refer to more than two.

Claims

1. A plasma burner, characterized in that: include: The burner outer cylinder (1) comprises an "L"-shaped cylinder body consisting of a vertical end and a transverse end, wherein the vertical end of the burner outer cylinder (1) is an air inlet (11) for receiving and transporting hot air containing coal powder, and the transverse end of the burner outer cylinder (1) is an air outlet (12); The plasma generator (2) comprises a sleeve (21) inserted into the burner outer cylinder (1) along the length direction of the transverse end of the burner outer cylinder (1), the connection between the sleeve (21) and the burner outer cylinder (1) is sealed, and a first guide groove (211) is provided in the cylinder wall of the sleeve (21), a cathode rod (23) is movably provided in the sleeve (21), a second guide groove (231) is provided in the cathode rod (23), and a plurality of ventilation grooves (212) are provided at one end of the sleeve (21) close to the air outlet (12); A cooling component (3) comprises a cooling box (31) storing an insulating cooling medium, and a water pump (33) for pumping the insulating cooling medium in the cooling box (31) into the first guide groove (211) through a water inlet pipe (32); and further comprises a T-shaped tube (34) arranged in the sleeve (21), wherein the T-shaped tube (34) is located at an end of the cathode rod (23) away from the air outlet (12) and a space is left between the cathode rod (23) and the cathode rod (23) for the cathode rod (23) to reciprocate in the sleeve (21). a movable gap, the vertical end of the T-tube (34) is connected to the inlet of the first guide groove (211), the lateral end of the T-tube (34) is dynamically sealed with a first connecting tube (35), the interior of the first connecting tube (35) is hollow, and one end corresponding to the cathode rod (23) is open and connected to the inlet of the second guide groove (231), the other end of the cathode rod (23) is closed, and the cathode rod (23) is provided with a liquid inlet connected to the T-tube (34) at the position corresponding to the T-tube (34); It also includes a second connecting pipe (36) arranged in the sleeve (21), one end of the second connecting pipe (36) is connected to the outlet of the first guide groove (211), and the other end of the second connecting pipe (36) is connected to the outlet of the second guide groove (231) through a third connecting pipe (37), and the third connecting pipe (37) and the second connecting pipe (36) are dynamically sealed; it also includes a return pipe (38) one end of which is connected to the second connecting pipe (36) and the other end of which is connected to the cooling box (31).

2. A plasma burner according to claim 1, characterized in that: The water inlet pipe (32) is provided with a switch valve (4), and the sleeve (21) is provided with a control component (5). The control component (5) is used to control the on-off state of the switch valve (4). When the cathode rod (23) moves back and forth in the sleeve (21), it can drive the first connecting pipe (35) to move and trigger the control component (5), thereby changing the on-off state of the switch valve (4).

3. A plasma burner according to claim 2, characterized in that: The switch valve (4) comprises a valve body (41), the interior of the valve body (41) is hollow, and interfaces communicating with the water inlet pipe (32) are arranged on both sides; the valve body (41) is dynamically sealed with a valve plate (42), and the valve plate (42) is provided with through holes (43) for communicating with the interfaces on both sides of the valve body (41); the control component (5) is used to control the valve plate (42) to move back and forth in the valve body (41), so that the through holes (43) are communicated with the interfaces on both sides of the valve body (41) and the interfaces on both sides of the valve body (41) are blocked.

4. A plasma burner according to claim 3, characterized in that: The valve body (41) is provided with a contact sensor (44), and when the through hole (43) is in communication with interfaces on both sides of the valve body (41), the valve plate (42) contacts the contact sensor (44); It also includes a control processor, which is connected to the contact sensor (44) and the water pump (33) by signal.

5. A plasma burner according to claim 3, characterized in that: The control component (5) includes a valve stem (51) extending into the valve body (41) and connected to the valve plate (42), and also includes a hydraulic chamber (52) arranged in the sleeve (21), one end of the first connecting pipe (35) extending into the hydraulic chamber (52), and the end thereof is provided with a push plate (53) dynamically sealingly matched with the hydraulic chamber (52); One end of the hydraulic chamber (52) away from the first connecting pipe (35) is connected to a push chamber (54), one end of the valve stem (51) extends into the push chamber (54) and cooperates with the push chamber (54) in a dynamic seal, and the hydraulic chamber (52) is filled with a pressure transmission medium between the corresponding valve stem (51) and the push plate (53).

6. A plasma burner according to claim 1, characterized in that: The first guide groove (211) and the second guide groove (231) are arranged in a spiral shape inside the corresponding sleeve (21) and the cathode rod (23).

7. A plasma burner according to claim 1, characterized in that: A combustion-supporting component (6) is provided inside the burner outer cylinder (1), and the combustion-supporting component (6) comprises a plurality of combustion cylinders (61) distributed between the sleeve (21) and the air outlet (12) of the burner outer cylinder (1), and the combustion cylinders (61) are arranged in sequence along the direction from the sleeve (21) to the air outlet (12), and the diameters of the cylinders are arranged from small to large.

8. A plasma burner according to claim 1, characterized in that: A partition plate (13) is provided inside the air inlet (11) of the burner outer tube (1); the partition plate (13) is in a "J" shape and corresponds to the curvature of the burner outer tube (1).

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