A furnace burner

Abstract

The utility model discloses a kind of kiln burner, including gun seat body, combustion supporting sleeve, gas inner tube, air disc piece, ignition electrode and gas nozzle head, air disc piece includes air disc body and the several air disc teeth of being fixed to the outer periphery of air disc body, the gap between two adjacent air disc teeth is air hole, air disc body is equipped with the through-hole equal to the number of air disc teeth, through-hole and air hole are one-to-one corresponding in radial direction, gas nozzle head is equipped with several gas holes, gas hole and through-hole are staggered in radial direction each other.The structure combination of the utility model air disc piece and gas nozzle makes combustion supporting air and gas more fully and orderly mixed, reduce the waste of gas caused by wind gas disorderly mixing, the burner structure provides reasonable low wind gas ratio, under the premise of guaranteeing normal flame form and color, the wind combustion ratio used is only between 0.5-0.7, control combustion supporting air volume is less, energy-saving effect is good, solve the pain point that traditional gas burner is not enough energy-saving in tunnel kiln industry.

Description

Technical Field

[0001] This utility model relates to the field of industrial kiln technology, and in particular to a kiln burner. Background Technology

[0002] To ensure normal flame shape and color, traditional gas burners typically require an air-fuel ratio of 1.5:1 or higher, resulting in a large amount of combustion air. Furthermore, the air-fuel ratio provided by the burner's air fan and nozzle combination structure is not sufficiently rational or energy-efficient. Utility Model Content

[0003] The present invention aims to at least partially solve one of the aforementioned technical problems in the related art. To this end, the present invention proposes a kiln burner.

[0004] To achieve the above objectives, the technical solution of this utility model is as follows:

[0005] A kiln burner according to an embodiment of the present invention includes a gun base body, a combustion-supporting sleeve, a gas inner pipe, an air disc, an ignition electrode, and an air nozzle. The gun base body is coaxially connected to the rear end of the combustion-supporting sleeve. The gun base body is provided with a gas inlet and an air inlet. The gas inner pipe is located inside the gun base body and the combustion-supporting sleeve. The air disc and the air nozzle are installed at the front end of the gas inner pipe, and the air disc is connected to the rear side of the air nozzle. The air disc and the air nozzle are coaxially arranged. The rear end of the gas inner pipe communicates with the gas inlet. One end of the ignition electrode is disposed on the gun base body. The other end extends forward to pass through the wind disc and is located beside the air nozzle. The wind disc includes a wind disc body and several wind disc teeth fixed to the outer periphery of the wind disc body. The wind disc teeth are arranged in a circular array with the central axis of the wind disc body as the axis. The gap between two adjacent wind disc teeth is a wind tunnel. The wind disc body has through holes equal in number to the wind disc teeth. The through holes are arranged in a circular array with the central axis of the wind disc body as the axis. The through holes and the wind tunnels correspond one-to-one in the radial direction. The air nozzle has several air holes. The air holes and the through holes are offset from each other in the radial direction.

[0006] The kiln burner according to the embodiment of this utility model has at least the following beneficial effects:

[0007] The structural combination of the air disc and nozzle of this utility model enables a more thorough and orderly mixing of combustion air and gas, reducing the waste of gas caused by disordered air-gas mixing. The burner structure provides a reasonable low air-gas ratio. Under the premise of ensuring normal flame shape and color, the air-gas ratio used is only between 0.5 and 0.7, which controls the amount of combustion air and has a good energy-saving effect, solving the pain point of insufficient energy saving of traditional gas burners in the tunnel kiln industry.

[0008] According to some embodiments of this utility model, the air nozzle is composed of a hollow cylinder and a cone. The cylinder and the cone are coaxially arranged, and the cylinder is connected to the rear end of the cone. The air holes include a first air hole and a second air hole. The first air hole is provided on the cylindrical surface of the cylinder, and the number of the first air holes is equal to the number of the through holes. The first air holes are arranged in a circular array with the central axis of the air nozzle as the axis. The second air hole is provided on the conical surface of the cone, and the number of the second air holes is equal to the number of the through holes. The second air holes are arranged in a circular array with the central axis of the air nozzle as the axis.

[0009] According to some embodiments of this utility model, the number of wind turbine teeth is 10-15, and the air outlet area of ​​each wind tunnel is 60mm. 2 -90mm 2 .

[0010] According to some embodiments of this utility model, among all the through holes, one through hole serves as an ignition hole for mounting the other end of the ignition electrode, and the remaining through holes are air vents, each with an air outlet area of ​​15mm². 2 -25mm 2 .

[0011] According to some embodiments of this utility model, the inner diameter of the gas inlet and the gas inner pipe is 19mm-21mm, the inner diameter of the air inlet is 48mm-52mm, the inner diameter of the gun base and the combustion sleeve is 67mm-73mm, and the length of the gas inner pipe is 450mm-470mm.

[0012] According to some embodiments of this utility model, the gas inner pipe, the fan disc, and the gas nozzle are made of 310S stainless steel.

[0013] According to some embodiments of this utility model, the combustion-supporting sleeve is made of recrystallized silicon carbide.

[0014] According to some embodiments of the present invention, the cross-section of the fan disc teeth is fan-shaped, and the cross-section is perpendicular to the central axis of the fan disc body.

[0015] According to some embodiments of the present invention, the wind disk teeth are inclined so that the air outlet direction of the wind tunnel is inclined to the central axis of the wind disk body, and the air outlet directions of all the wind tunnels are parallel.

[0016] According to some embodiments of this utility model, it further includes a flange. The front end of the gun base body has a mounting plate. The front end face of the mounting plate is provided with a first annular groove and a second annular groove. The first annular groove and the second annular groove are both coaxial with the central axis of the gun base body. The first annular groove is located inside the second annular groove. The depth of the first annular groove is greater than the depth of the second annular groove. The rear end of the combustion-supporting sleeve is provided with a mounting flange. The outer circumferential diameter of the mounting flange is greater than the outer circumferential wall diameter of the combustion-supporting sleeve. The mounting flange is fitted into the first annular groove. The flange is fitted onto the combustion-supporting sleeve. The inner circumferential wall of the flange is clearance-fitted with the outer circumferential wall of the combustion-supporting sleeve. The flange is fitted into the second annular groove. The flange and the mounting plate are connected by a screw.

[0017] Additional aspects and advantages of this invention will be set forth in part in the description which follows, and in part will be obvious from the description, or may be learned by practice of the invention. Attached Figure Description

[0018] The above and / or additional aspects and advantages of this utility model will become apparent and readily understood from the description of the embodiments taken in conjunction with the following drawings, in which:

[0019] Figure 1 This is a schematic diagram of the overall structure of this utility model;

[0020] Figure 2 This is a front view of the fan disc and air nozzle of this utility model;

[0021] Figure 3 This is a side view of the fan disc and air nozzle of this utility model;

[0022] Figure 4 This is a front view of the installation disk of this utility model;

[0023] Figure 5 This is a structural diagram of the combustion-supporting sleeve of this utility model.

[0024] Reference numerals: gun base 100, gas inlet 110, air inlet 120, mounting plate 130, first annular groove 131, second annular groove 132, combustion sleeve 200, mounting flange 210, gas inner pipe 300, air disc 400, air disc body 410, ignition hole 411, air hole 412, air disc teeth 420, air tunnel 421, ignition electrode 500, gas nozzle head 600, first air hole 610, second air hole 620, flange 700, screw 800. Detailed Implementation

[0025] The embodiments of this utility model are described in detail below. Examples of these embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary and intended to explain this utility model, and should not be construed as limiting this utility model.

[0026] In the description of this utility model, it should be understood that the terms "front" and "rear", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings. They are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model.

[0027] Reference Figure 1-5 A kiln burner includes a gun base body 100, a combustion-supporting sleeve 200, a gas inner pipe 300, an air disc 400, an ignition electrode 500, and an air nozzle 600. The gun base body 100 is coaxially connected to the rear end of the combustion-supporting sleeve 200. The gun base body 100 and the combustion-supporting sleeve 200 are hollow structures and are connected. The gun base body 100 is provided with a gas inlet 110 and an air inlet 120. The gas inner pipe 300 is located inside the gun base body 100 and the combustion-supporting sleeve 200. The air disc 400 and the air nozzle 600 are installed at the front end of the gas inner pipe 300, and the air disc 400 is connected to the rear side of the air nozzle 600. The air disc 400 and the air nozzle 600 are coaxially arranged. The rear end of the gas inner pipe 300 is connected to the gas inlet 110. The ignition electrode 500 is connected, with one end located at the rear end of the gun base 100 and the other end extending forward to pass through the air disc 400 and located beside the air nozzle 600. The air disc 400 includes an air disc body 410 and several air disc teeth 420 fixed on the outer periphery of the air disc body 410. The air disc teeth 420 are arranged in a circular array with the central axis of the air disc body 410 as the axis. The gap between two adjacent air disc teeth 420 is a wind tunnel 421. The air disc body 410 has a number of through holes equal to the number of air disc teeth 420. The through holes are arranged in a circular array with the central axis of the air disc body 410 as the axis. The through holes and the wind tunnels 421 correspond one-to-one in the radial direction. The air nozzle 600 has several air holes, which are radially offset from the through holes.

[0028] Working principle: A suitable amount of gas is introduced into the gas inlet 110, passes through the gas inner pipe 300, and finally exits from the gas nozzle 600. The air inlet 120 introduces air into the inner cavity of the gun base 100. The air passes through the inner cavity of the combustion sleeve 200 and finally exits from the air hole 421 and through hole between the air disc teeth 420, mixing with the gas. The ratio of air to gas is (0.5-0.7):1. After the air and gas are mixed, the ignition electrode 500 is energized by the igniter. The other end of the ignition electrode 500 forms a spark next to the gas nozzle 600, realizing the burner ignition and combustion.

[0029] In some embodiments of this invention, the nozzle 600 is composed of a hollow cylinder and a cone, coaxially arranged, with the cylinder connected to the rear end of the cone. The nozzle includes a first air hole 610 and a second air hole 620. The first air hole 610 is provided on the cylindrical surface of the cylinder, and the number of first air holes 610 is equal to the number of through holes. The first air holes 610 are arranged in a circular array around the central axis of the nozzle 600. The second air hole 620 is provided on the conical surface of the cone, and the number of second air holes 620 is equal to the number of through holes. The second air holes 620 are also arranged in a circular array around the central axis of the nozzle 600. This design creates a multi-directional gas jet, rather than a single axial or radial airflow, allowing the gas to penetrate the combustion air flowing from the air disc 400 more evenly and at multiple angles. By spatially misaligning the air holes of the air nozzle 600 with the through holes on the air disc 400, the gas flow is guided to efficiently penetrate the combustion air flow, achieving deep and orderly mixing, thereby ensuring complete and stable combustion of the gas even at a low air-fuel ratio.

[0030] In some embodiments of this utility model, the number of wind turbine teeth 420 is 10-15, and the air outlet area of ​​each wind tunnel 421 is 60mm. 2 -90mm 2 .

[0031] In some embodiments of this utility model, one of the through holes serves as an ignition hole 411 for mounting the other end of the ignition electrode 500, while the remaining through holes are air vents 412, each with an air outlet area of ​​15mm². 2 -25mm 2 Compared to traditional burners, the wind tunnel 421 and wind hole 412 of this invention are both enlarged to ensure the volume and stability of the combustion air supply.

[0032] In some embodiments of this utility model, the inner diameter of the gas inlet 110 and the gas inner pipe 300 is 19mm-21mm, the inner diameter of the air inlet 120 is 48mm-52mm, the inner diameter of the gun holder 100 and the combustion sleeve 200 is 67mm-73mm, and the length of the gas inner pipe 300 is 450mm-470mm. In the industry, a dense arrangement of multiple low-power burners is commonly used. These burners have low power, generally 90KW or below. Due to their low power, their combustion and heating capacity is limited during operation. Especially for the currently mainstream wide-body kilns, traditional gas burners lack the ability to heat and continuously control the temperature, resulting in large temperature fluctuations within the kiln. Precise temperature control according to the set firing curve is difficult to achieve. Furthermore, in order to effectively achieve air-gas premixed combustion, the burner of a ceramic tunnel kiln is generally designed with a shorter nozzle length. However, this also results in a shorter flame range, causing the flame to travel too far from the kiln interior. As a result, much of the heat emitted by the flame accumulates within the burner's sleeve, leading to the sleeve glowing red and breaking, and ultimately, the high-temperature heat penetrating the kiln wall and causing it to collapse. This invention increases the burner power to approximately 150KW by enlarging the inner diameter of the gas inner pipe 300, the nozzle base 100, and the combustion sleeve 200. This improves the combustion and heating capacity, allowing for a high-power, fewer-burner arrangement within the tunnel kiln. This addresses the shortcomings of traditional gas burners used in mainstream wide-body kilns, such as insufficient heating and heat preservation capabilities, and large temperature fluctuations within the kiln. The kiln can then achieve precise temperature control according to a set firing curve. The length of the gas inner pipe 300 is appropriately increased based on the kiln wall thickness to ensure the flame emitted by the burner reaches a certain range within the kiln.

[0033] In some embodiments of this invention, the gas inner tube 300, the air disc 400, and the gas nozzle 600 are made of 310S stainless steel. Traditional gas burners mostly use 304 stainless steel for their nozzle cores. 304 stainless steel has low refractoriness, and the nozzle core is easily scorched and charred by the ultra-high temperature flame, leading to blockage and burn-out, resulting in a short lifespan. In this invention, the gas inner tube 300, air disc 400, and gas nozzle 600 are made of 310S stainless steel, which has high refractoriness, significantly extending the burner's service life.

[0034] In some embodiments of this invention, the combustion-supporting sleeve 200 is made of recrystallized silicon carbide. When the air pressure used in a traditional gas burner is too low, the inner wall of the silicon carbide sleeve often melts, forming small lumps that obstruct the normal ejection of the burner flame. This invention uses a recrystallized silicon carbide combustion-supporting sleeve 200 to replace the traditional silicon carbide sleeve. Recrystallized silicon carbide has high refractoriness and stable performance.

[0035] In some embodiments of this utility model, the cross-section of the fan tooth 420 is fan-shaped, and the cross-section is perpendicular to the central axis of the fan body 410.

[0036] In some embodiments of this invention, the wind disk teeth 420 are inclined so that the air outlet direction of the wind tunnel 421 is inclined to the central axis of the wind disk body 410, and the air outlet directions of all wind tunnels 421 are parallel. The fan-shaped cross-section and inclined arrangement of the wind disk teeth 420 can generate strong swirling flow, and the swirling flow stability is higher.

[0037] In some embodiments of this utility model, a flange 700 is also included. The front end of the gun base body 100 has a mounting plate 130. The front end face of the mounting plate 130 is provided with a first annular groove 131 and a second annular groove 132. The first annular groove 131 and the second annular groove 132 are both coaxial with the central axis of the gun base body 100. The first annular groove 131 is located inside the second annular groove 132. The depth of the first annular groove 131 is greater than the depth of the second annular groove 132. The rear end of the combustion-supporting sleeve 200 is provided with a mounting flange 210. The outer circumferential diameter of the mounting flange 210 is greater than the outer circumferential wall diameter of the combustion-supporting sleeve 200. The mounting flange 210 is embedded in the first annular groove 131. The flange 700 is sleeved on the combustion-supporting sleeve 200. The inner circumferential wall of the flange 700 is clearance-fitted with the outer circumferential wall of the combustion-supporting sleeve 200. The flange 700 is embedded in the second annular groove 132. The flange 700 and the mounting plate 130 are connected by a screw 800. The mounting plate 130 has elliptical holes along its circumference, which serve as bolt holes for mounting the burner on the kiln wall mounting steel plate.

[0038] Although embodiments of the present invention have been shown and described, those skilled in the art will understand that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the claims and their equivalents.

Claims

1. A kiln burner, characterized in that, The device includes a gun base body (100), a combustion-supporting sleeve (200), a gas inner tube (300), an air disc (400), an ignition electrode (500), and a gas nozzle (600). The gun base body (100) is coaxially connected to the rear end of the combustion-supporting sleeve (200). The gun base body (100) is provided with a gas inlet (110) and an air inlet (120). The gas inner tube (300) is located at the gun base body (100). The gas pipe (300) and the combustion sleeve (200) are installed inside the gas pipe (300). The air disc (400) and the gas nozzle (600) are installed at the front end of the gas pipe (300), and the air disc (400) is connected to the rear side of the gas nozzle (600). The air disc (400) and the gas nozzle (600) are coaxially arranged. The rear end of the gas pipe (300) is connected to the gas inlet (110). The ignition electrode (500) is also included. One end is located on the gun base body (100), and the other end extends forward to pass through the air disc (400) and is located next to the air nozzle (600). The air disc (400) includes an air disc body (410) and a number of air disc teeth (420) fixed on the outer periphery of the air disc body (410). The air disc teeth (420) are arranged in a circular array with the central axis of the air disc body (410) as the axis. The gap between two adjacent air disc teeth (420) is a wind tunnel (421). The air disc body (410) has a number of through holes equal to the number of air disc teeth (420). The through holes are arranged in a circular array with the central axis of the air disc body (410) as the axis. The through holes and the wind tunnels (421) correspond one-to-one in the radial direction. The air nozzle (600) has a number of air holes. The air holes and the through holes are offset from each other in the radial direction.

2. The kiln burner according to claim 1, characterized in that, The air nozzle (600) is composed of a hollow cylinder and a cone. The cylinder and the cone are coaxially arranged, and the cylinder is connected to the rear end of the cone. The air holes include a first air hole (610) and a second air hole (620). The first air hole (610) is provided on the cylindrical surface of the cylinder. The number of the first air holes (610) is equal to the number of the through holes. The first air holes (610) are arranged in a circular array with the central axis of the air nozzle (600) as the axis. The second air hole (620) is provided on the conical surface of the cone. The number of the second air holes (620) is equal to the number of the through holes. The second air holes (620) are arranged in a circular array with the central axis of the air nozzle (600) as the axis.

3. The kiln burner according to claim 1, characterized in that, The number of wind turbine teeth (420) is 10-15, and the air outlet area of ​​each wind tunnel (421) is 60mm. 2 -90mm 2 .

4. The kiln burner according to claim 3, characterized in that, Of all the through holes, one serves as an ignition hole (411) for mounting the other end of the ignition electrode (500), and the remaining through holes are air vents (412), each with an air outlet area of ​​15 mm². 2 -25mm 2 .

5. The kiln burner according to claim 1, characterized in that, The inner diameter of the gas inlet (110) and the gas inner tube (300) is 19mm-21mm, the inner diameter of the air inlet (120) is 48mm-52mm, the inner diameter of the gun base body (100) and the combustion sleeve (200) is 67mm-73mm, and the length of the gas inner tube (300) is 450mm-470mm.

6. The kiln burner according to claim 1, characterized in that, The gas inner pipe (300), fan disc (400) and gas nozzle (600) are made of 310S stainless steel.

7. The kiln burner according to claim 1, characterized in that, The combustion-supporting sleeve (200) is made of recrystallized silicon carbide.

8. The kiln burner according to claim 1, characterized in that, The cross-section of the fan tooth (420) is fan-shaped and is perpendicular to the central axis of the fan body (410).

9. The kiln burner according to claim 1, characterized in that, The wind disk teeth (420) are inclined so that the air outlet direction of the wind tunnel (421) is inclined to the central axis of the wind disk body (410), and the air outlet directions of all the wind tunnels (421) are parallel.

10. The kiln burner according to claim 1, characterized in that, It also includes a flange (700), and the front end of the gun base body (100) has a mounting plate (130). The front end face of the mounting plate (130) is provided with a first annular groove (131) and a second annular groove (132). The first annular groove (131) and the second annular groove (132) are both coaxial with the central axis of the gun base body (100), and the first annular groove (131) is located inside the second annular groove (132). The depth of the first annular groove (131) is greater than the depth of the second annular groove (132). The combustion-supporting sleeve (200) The rear end is provided with a mounting flange (210), the outer diameter of which is larger than the outer diameter of the combustion-supporting sleeve (200). The mounting flange (210) is fitted into the first annular groove (131). The flange (700) is fitted onto the combustion-supporting sleeve (200), and the inner wall of the flange (700) is clearance-fitted with the outer wall of the combustion-supporting sleeve (200). The flange (700) is fitted into the second annular groove (132). The flange (700) and the mounting plate (130) are connected by a screw (800).

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