A regenerative burner

Abstract

The utility model relates to the technical field of combustor provides a kind of regenerative combustor, including heat storage tank and combustor body;The heat storage tank is formed with heat storage chamber in, and the flue gas pipeline that is communicated with the heat storage chamber is arranged on the side wall of the heat storage tank;The combustor body is installed on the heat storage tank, and the combustor body is formed with the combustion chamber that is communicated with the heat storage chamber, and the combustion chamber is equipped with nozzle on one end, and the first gas pipe, the second gas pipe, the ignition pipe and the secondary air pipe that are communicated with the combustion chamber are inserted in the side wall of the combustor body, the first gas pipe and the second gas pipe are respectively located at the two sides of the combustor body, and both are towards the nozzle and are inclined arrangement;The utility model solves the problem that traditional regenerative combustor gas mixes with air and has poor effect, and has the advantages of simple structure and low manufacturing cost.

Description

Technical Field

[0001] This utility model relates to the field of burner technology, and more specifically, to a regenerative burner. Background Technology

[0002] Regenerative thermal ignition (RTI) burners are highly efficient and energy-saving combustion devices widely used in industrial furnaces in metallurgy, glass, ceramics, and other industries. Their core principle is to recover waste heat from flue gas using a regenerator (such as ceramic honeycomb or spherical regenerator materials) and preheat combustion air or fuel gas, thereby improving combustion efficiency and reducing fuel consumption. The main components of the flue gas from most regenerative burners in aluminum melting furnaces on the market are NOx, CO, O2, N2, CO2, and SO2. However, in existing technologies, traditional RTI burners use a sleeve-type main gun structure with a single-point connection to the burner. The combustion process employs external mixing, which leads to poor mixing of fuel gas and air, excessive air volume, and excessively high flame center temperature. In the high-temperature environment inside the furnace (600-1050 degrees Celsius), N and O2 in the air directly react to generate large amounts of NOx. The NOx generation is approximately 500-550 mg / m3 (12% oxygen standard content), significantly exceeding national requirements. Utility Model Content

[0003] Based on this, in order to solve the problem of poor gas-air mixing in traditional regenerative burners, this utility model provides a regenerative burner, the specific technical solution of which is as follows:

[0004] A regenerative burner includes a heat storage box and a burner body; a heat storage chamber is formed inside the heat storage box, and a flue gas pipe communicating with the heat storage chamber is provided on the side wall of the heat storage box; the burner body is mounted on the heat storage box, and a combustion chamber communicating with the heat storage chamber is formed inside the burner body, a nozzle is provided at one end of the combustion chamber, and a first gas pipe, a second gas pipe, an ignition pipe and a secondary air pipe, all communicating with the combustion chamber, are inserted into the side wall of the burner body, the first gas pipe and the second gas pipe are respectively located on both sides of the burner body, and both are inclined towards the nozzle.

[0005] The aforementioned regenerative burner, by incorporating a heat storage box, absorbs the sensible heat of high-temperature flue gas and then transfers the heat to the combustion air or fuel gas, improving heat recovery efficiency and significantly reducing fuel consumption. The flue gas duct facilitates the return of exhaust gas to the heat storage box for combustion and decomposition, achieving flue gas recirculation and reducing the nitrogen oxide content in the final exhaust gas. A secondary air pipe introduces air into the combustion chamber, allowing carbon monoxide in the high-temperature flue gas to react with oxygen in the air to produce carbon dioxide, thus reducing carbon monoxide levels to a reasonable range and meeting low nitrogen oxide emission requirements. The inclined first and second fuel gas pipes allow the fuel gas and air to converge at a specific angle, resulting in better mixing and a significantly improved air-fuel ratio. This leads to a significantly improved flame combustion state and more complete combustion, greatly reducing nitrogen oxides produced under high-temperature conditions, thus making it more energy-efficient and environmentally friendly.

[0006] Furthermore, the combustion chamber is cylindrical, and the first gas pipe and the second gas pipe are symmetrically arranged relative to the central axis of the combustion chamber.

[0007] Furthermore, the flue gas duct includes an inlet pipe and an outlet pipe that communicates with the inlet pipe. One end of the inlet pipe is connected to an external exhaust duct, and the other end of the inlet pipe is detachably installed on one end of the outlet pipe. The other end of the outlet pipe is inserted into the side wall of the heat storage box and extends into the interior of the heat storage chamber.

[0008] Furthermore, the burner body has nozzles and inspection ports at both ends that are respectively connected to the combustion chamber. A connecting housing is provided on the nozzle, and the connecting housing is inserted into the external melting furnace. An inspection door is installed at the inspection port to control the opening and closing status of the inspection port.

[0009] Furthermore, the nozzle is disposed between the combustion chamber and the nozzle opening.

[0010] Furthermore, a reserved tube and a detection tube are also provided on the side wall of the burner body, and both the reserved tube and the detection tube extend into the combustion chamber.

[0011] Furthermore, a reserved interface is fitted on one end of the reserved tube, and the other end of the reserved tube faces the nozzle; a flame probe interface is fitted on one end of the detection tube, and the other end of the detection tube faces the nozzle.

[0012] Furthermore, both the ignition tube and the secondary air tube are oriented toward the nozzle and are inclined. Attached Figure Description

[0013] Figure 1 This is one of the structural schematic diagrams of a regenerative burner according to an embodiment of the present invention;

[0014] Figure 2 This is a second schematic diagram of the structure of the regenerative burner according to an embodiment of the present invention;

[0015] Figure 3 This is a partial cross-sectional structural schematic diagram of the burner body of the regenerative burner according to an embodiment of the present invention.

[0016] Explanation of reference numerals in the attached figures:

[0017] 1. Heat storage box; 2. Burner body; 21. Combustion chamber; 22. Nozzle; 23. Connecting shell; 24. Inspection door; 3. Flue gas duct; 4. First gas pipe; 5. Second gas pipe; 6. Ignition pipe; 7. Secondary air pipe; 8. Reserved pipe; 81. Reserved interface; 9. Detector pipe; 91. Flame probe interface; 10. Melting furnace. Detailed Implementation

[0018] To make the objectives, technical solutions, and advantages of this utility model clearer, the following detailed description is provided in conjunction with its embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the utility model and do not limit its scope of protection.

[0019] It should be noted that when an element is referred to as being "fixed to" another element, it can be directly attached to the other element or there may be an intervening element. When an element is referred to as being "connected to" another element, it can be directly connected to the other element or there may be an intervening element. The terms "vertical," "horizontal," "left," "right," and similar expressions used herein are for illustrative purposes only and do not represent the only possible implementation.

[0020] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention pertains. The terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention. The term "and / or" as used herein includes any and all combinations of one or more of the associated listed items.

[0021] In this utility model, "first" and "second" do not represent a specific quantity or order, but are merely used to distinguish names.

[0022] like Figures 1-3As shown, a regenerative burner according to one embodiment of the present invention includes a heat storage box 1 and a burner body 2; a heat storage chamber is formed inside the heat storage box 1, and a flue gas pipe 3 communicating with the heat storage chamber is provided on the side wall of the heat storage box 1; the burner body 2 is installed on the heat storage box 1, and a combustion chamber 21 communicating with the heat storage chamber is formed inside the burner body 2. A nozzle 22 is provided at one end of the combustion chamber 21, and a first gas pipe 4, a second gas pipe 5, an ignition pipe 6 and a secondary air pipe 7, all communicating with the combustion chamber 21, are inserted into the side wall of the burner body 2. The first gas pipe 4 and the second gas pipe 5 are located on both sides of the burner body 2, and both are inclined towards the nozzle 22.

[0023] The aforementioned regenerative burner, by incorporating a heat storage box 1, absorbs the sensible heat of high-temperature flue gas and then transfers the heat to the combustion air or fuel gas, improving heat recovery efficiency and significantly reducing fuel consumption. The flue gas duct 3 facilitates the return of the discharged flue gas to the heat storage box 1 for combustion and decomposition, achieving flue gas recirculation and reducing the nitrogen oxide content in the final discharged flue gas. The secondary air pipe 7 introduces air into the combustion chamber 21, allowing carbon monoxide in the high-temperature flue gas to react with oxygen in the air to produce carbon dioxide, thereby reducing carbon monoxide levels to a reasonable range and meeting low nitrogen oxide emission requirements. The inclined first fuel gas pipe 4 and second fuel gas pipe 5 allow the fuel gas and air to converge at a specific angle, resulting in better mixing and a significantly improved air-fuel ratio. This significantly enhances the flame combustion state and ensures more complete combustion, thereby greatly reducing nitrogen oxides produced under high-temperature conditions, making it more energy-efficient and environmentally friendly.

[0024] Specifically, ignition tube 6 is used for connection to a constant-fire ignition gun.

[0025] Specifically, a fan is used to introduce air into the secondary air pipe 7. This is existing technology and will not be described in detail.

[0026] like Figure 3 As shown, in one embodiment, the combustion chamber 21 is cylindrical, and the first gas pipe 4 and the second gas pipe 5 are symmetrically arranged relative to the central axis of the combustion chamber 21. Gas is supplied directly from two oblique insertion points on the side of the combustion chamber 21, so that the gas and air meet at a specific angle, eliminating the need for specially designed burner bricks to change the shape of the combustion flame, thus reducing maintenance and operating costs.

[0027] In one embodiment, the flue gas duct 3 includes an inlet pipe and an outlet pipe that communicates with the inlet pipe. One end of the inlet pipe is connected to an external exhaust duct, and the other end of the inlet pipe is detachably installed on one end of the outlet pipe. The other end of the outlet pipe is inserted into the side wall of the heat storage box 1 and extends into the heat storage chamber.

[0028] Specifically, the oxygen content meter and actuator control the flow rate of flue gas recirculation in the flue gas inlet pipe and the oxygen content in the combustion air, with the aim of achieving oxygen-deficient combustion. The oxygen content meter, actuator, and their specific settings are existing technologies and will not be described in detail.

[0029] like Figure 1 and Figure 3 As shown, in one embodiment, the burner body 2 has a nozzle and an inspection port at both ends, respectively communicating with the combustion chamber 21. A connecting housing 23 is provided over the nozzle, and the connecting housing 23 is inserted into the external melting furnace 10. An inspection door 24 is installed at the inspection port to control its opening and closing status. The inspection door 24 facilitates the cleaning of slag accumulation inside the combustion chamber 21, ensuring a continuous and stable combustion state.

[0030] In one embodiment, the nozzle 22 is disposed between the combustion chamber 21 and the nozzle.

[0031] like Figures 1-3 As shown, in one embodiment, a reserved pipe 8 and a detection pipe 9 are also provided on the side wall of the burner body 2, and both the reserved pipe 8 and the detection pipe 9 extend into the combustion chamber 21.

[0032] like Figure 3 As shown, in one embodiment, a reserved interface 81 is fitted onto one end of the reserved tube 8, and the other end of the reserved tube 8 faces the nozzle 22. A flame probe interface 91 is fitted onto one end of the detection tube 9, and the other end of the detection tube 9 faces the nozzle 22. This facilitates the installation of the flame probe.

[0033] Specifically, the flame probe is used to detect the light intensity and flicker frequency of the flame. This allows operators to monitor the flame combustion status inside the burner body 2 at all times. The flame probe is existing technology, and its specific model, installation method, and working principle will not be elaborated upon here.

[0034] like Figure 3 As shown, in one embodiment, both the ignition tube 6 and the secondary air tube 7 are oriented toward the nozzle 22 and are inclined.

[0035] The technical features of the above embodiments can be combined in any way. For the sake of brevity, not all possible combinations of the technical features in the above embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0036] The embodiments described above are merely illustrative of several implementations of this utility model, and while the descriptions are relatively specific and detailed, they should not be construed as limiting the scope of the utility model patent. It should be noted that those skilled in the art can make various modifications and improvements without departing from the concept of this utility model, and these all fall within the protection scope of this utility model. Therefore, the protection scope of this utility model patent should be determined by the appended claims.

Claims

1. A regenerative burner, characterized in that, include: A heat storage box, wherein a heat storage chamber is formed inside the heat storage box, and a flue gas duct communicating with the heat storage chamber is provided on the side wall of the heat storage box; The burner body is mounted on the heat storage box. A combustion chamber communicating with the heat storage chamber is formed inside the burner body. A nozzle is provided at one end of the combustion chamber. A first gas pipe, a second gas pipe, an ignition pipe, and a secondary air pipe, all communicating with the combustion chamber, are inserted into the side wall of the burner body. The first gas pipe and the second gas pipe are located on both sides of the burner body, and both are inclined towards the nozzle.

2. The regenerative burner according to claim 1, characterized in that, The combustion chamber is cylindrical, and the first gas pipe and the second gas pipe are symmetrically arranged with respect to the central axis of the combustion chamber.

3. The regenerative burner according to claim 1, characterized in that, The flue gas duct includes an inlet pipe and an outlet pipe that communicates with the inlet pipe. One end of the inlet pipe is connected to an external exhaust duct, and the other end of the inlet pipe is detachably installed on one end of the outlet pipe. The other end of the outlet pipe is inserted into the side wall of the heat storage box and extends into the interior of the heat storage chamber.

4. The regenerative burner according to claim 1, characterized in that, The burner body has nozzles and inspection ports at both ends that are respectively connected to the combustion chamber. A connecting housing is provided on the nozzle and is inserted into an external melting furnace. An inspection door is installed at the inspection port to control the opening and closing status of the inspection port.

5. The regenerative burner according to claim 4, characterized in that, The nozzle is disposed between the combustion chamber and the nozzle opening.

6. The regenerative burner according to claim 5, characterized in that, The burner body sidewall is also provided with a reserved tube and a detection tube, both of which extend into the combustion chamber.

7. The regenerative burner according to claim 6, characterized in that, A reserved interface is fitted on one end of the reserved tube, and the other end of the reserved tube faces the nozzle. A flame probe interface is fitted on one end of the detection tube, and the other end of the detection tube faces the nozzle.

8. The regenerative burner according to claim 1, characterized in that, Both the ignition tube and the secondary air tube are oriented toward the nozzle and are inclined.

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