Air duct type combustor capable of automatically treating tail gas

Abstract

The utility model provides an air duct type burner capable of automatically processing tail gas, which is applied to the technical field of burners and is characterized by comprising a shell, an air inlet and an air outlet, and the air inlet and the air outlet are respectively arranged on two sides of the shell. A combustion head located between the air inlet and the air outlet is arranged in the middle of the shell. An air supply system for providing air for combustion of the combustion head is arranged on the shell; a fairing for guiding VOC waste gas entering the shell from the air inlet to a flame concentration area of the combustion head for high-temperature treatment is fixedly arranged in the shell; compared with the prior art, the waste gas treatment device has the technical effects that waste gas containing VOC enters the shell from the air inlet, is rectified through the fairing and is guided to a flame concentration area of the combustion head, and when the waste gas passes through flames of the combustion head and a peripheral high-temperature thermal field, the volatile organic compounds in the waste gas are fully decomposed and then discharged from the air outlet; therefore, the discharged tail gas can meet the environment-friendly requirement.

Description

Technical Field

[0001] This utility model relates to the field of burner technology, and in particular to a duct-type burner that self-treats exhaust gas. Background Technology

[0002] As an important surface treatment technology in industrial production, coating has gradually evolved from traditional manual operation to a highly automated production line system. In coating production lines, drying devices are typically installed to cure the coating, which generates exhaust emissions containing volatile organic compounds (VOCs). According to national environmental regulations, these pollutants must be purified before being released into the atmosphere.

[0003] At present, the industry generally uses regenerative thermal oxidizers (RTO) for tail gas treatment, which achieves the oxidation and decomposition of VOC waste gas by heating organic waste gas to above 760°C; however, traditional RTO equipment has significant defects: (1) The equipment is large in size, often occupying an area of ​​tens of square meters, which is difficult to adapt to small and medium-sized coating production lines; (2) The construction cost is high, including complex structures such as ceramic heat storage bodies and multi-chamber combustion systems, with equipment investment exceeding one million yuan; (3) The operating energy consumption is too high, and a large amount of natural gas fuel needs to be continuously consumed to maintain high-temperature oxidation.

[0004] Especially in small painting workshops, the over-design of traditional RTOs leads to low equipment utilization and waste of resources. Utility Model Content

[0005] The purpose of this invention is to provide a duct-type burner for self-treating exhaust gas. Its advantages are that it can be used in conjunction with a painting line and can effectively treat harmful substances in the exhaust gas to meet the requirements for exhaust gas emission.

[0006] To achieve the above and other related objectives, this utility model provides the following technical solution:

[0007] A duct-type burner for self-treating exhaust gas includes a housing and an air inlet and an air outlet respectively disposed on both sides of the housing.

[0008] A burner head is disposed in the middle of the housing between the air inlet and the air outlet; an air supply system is provided on the housing to provide air for the combustion of the burner head;

[0009] The housing is fixedly equipped with a shroud that guides the VOC exhaust gas entering the housing from the air inlet to the flame concentration area of ​​the burner head for high-temperature treatment.

[0010] In one embodiment of the present invention, the air supply system includes an air supply mechanism and an air guiding mechanism; the air supply mechanism includes a fan mounted on the housing and an air duct with one end connected to the fan and the other end extending into the housing.

[0011] In one embodiment of the present invention, the air guiding mechanism includes an air guiding hood fixedly connected to the end of the air duct and covering the burner head, and two guide plates located on the upper and lower sides of the burner head respectively; the opening of the air guiding hood faces the air outlet side.

[0012] One end of the guide plate is connected to the burner head, and the other end is connected to the air guide shroud; the guide plate is provided with a number of air guide holes.

[0013] In one embodiment of this utility model, the two guide vanes are arranged in a V-shape.

[0014] In one embodiment of the present invention, the fairing includes a rectifier baffle tube fixed inside the housing and a conical cover disposed inside the rectifier baffle tube, with one end fixedly connected to the air guide cover and the other end fixedly connected to the rectifier baffle tube.

[0015] The conical cover is provided with several air vents.

[0016] In one embodiment of this utility model, the diameter of the air hole near the burner head is larger than the diameter of the air hole near the air outlet.

[0017] In one embodiment of this utility model, mounting holes are provided on the housing located at the air inlet and air outlet.

[0018] As described above, the duct-type burner for self-treating exhaust gas of this utility model has the following beneficial effects:

[0019] 1. The VOC-containing exhaust gas enters the housing directly from the air inlet. The VOC exhaust gas is rectified by the rectifier and directed to the flame concentration area of ​​the burner head. When the VOC exhaust gas passes through the flame of the burner head and the surrounding high-temperature heat field, the volatile organic compounds in the VOC exhaust gas are fully decomposed and discharged from the air outlet, so that the exhaust gas can meet the environmental protection requirements.

[0020] 2. After treatment by this equipment, not only are harmful substances in the waste gas removed, but heat is also released through the combustion of harmful substances, reducing the energy consumption of the burner and thus achieving energy saving; based on the content of organic matter in the waste gas, the initial design achieves energy saving of more than 20%;

[0021] 3. The burner head is connected to an independent air supply system, which can stably provide air for the combustion of the burner head, thereby forming a stable flame at the front end of the burner;

[0022] 4. Mounting holes are provided on the housing at both the air inlet and the air outlet. These mounting holes are for assembly with the coating line, allowing it to be used directly with the coating line without the need for an additional RTO furnace, thus saving costs. Attached Figure Description

[0023] Figure 1 This is a schematic diagram of the overall structure of an embodiment of the present utility model from the left side.

[0024] Figure 2 This is a left view of the overall structure of an embodiment of this utility model;

[0025] Figure 3 This is a schematic diagram of the overall structure of an embodiment of the present utility model from the right side view;

[0026] Figure 4 This is a cross-sectional view of the overall structure of an embodiment of this utility model;

[0027] Figure 5 This is a schematic diagram of the fairing structure according to an embodiment of the present invention;

[0028] Figure 6 This is a schematic diagram of the air guide mechanism according to an embodiment of the present utility model.

[0029] Reference numerals in the attached drawings: 1. Shell; 2. Air inlet; 3. Air outlet; 4. Burner head; 5. Rectifier; 51. Rectifier baffle; 52. Conical shroud; 53. Air vent; 8. Air supply mechanism; 81. Fan; 82. Air duct; 11. Air guide mechanism; 111. Air guide shroud; 112. Guide plate; 113. Guide hole; 15. Support frame; 16. Mounting hole. Detailed Implementation

[0030] The following specific embodiments illustrate the implementation of this utility model. Those skilled in the art can easily understand other advantages and effects of this utility model from the content disclosed in this specification.

[0031] Please see Figures 1 to 6It should be understood that the structures, proportions, sizes, etc., illustrated in the accompanying drawings are merely for illustrative purposes to aid those skilled in the art and are not intended to limit the scope of this invention. Therefore, they have no substantial technical significance. Any modifications to the structure, changes in proportions, or adjustments to size, without affecting the effectiveness and purpose of this invention, should still fall within the scope of the disclosed technical content. Furthermore, the terms "upper," "lower," "left," "right," "middle," and "one" used in this specification are merely for clarity and not intended to limit the scope of this invention. Changes or adjustments to their relative relationships, without substantially altering the technical content, should also be considered within the scope of this invention.

[0032] Please see Figure 1 , Figure 2 , Figure 3 and Figure 4 This utility model provides a duct-type burner for self-treating exhaust gas, including a shell 1, a burner head 4, an air supply system and a shroud 5;

[0033] The housing 1 is a cuboid structure made of high-temperature resistant stainless steel. Air inlets 2 and outlets 3 are respectively located on the left and right side walls of the housing 1. The burner head 4 is located in the middle of the housing 1, between the air inlets 2 and outlets 3. VOC exhaust gas enters through the air inlet 2, is burned by the burner head 4, undergoes high-temperature treatment, and is discharged through the outlet 3, thus forming an air duct within the housing 1. An air supply system is installed on the housing 1 to provide air for the combustion of the burner head 4. The burner head 4 is connected to an independent air supply system, which can stably provide air for the combustion of the burner head 4, thereby forming a stable flame at the front end of the burner. A rectifier 5 is fixedly installed inside the housing 1 to guide the VOC exhaust gas to the burner head 4 for high-temperature treatment, thereby improving the VOC exhaust gas treatment effect.

[0034] The burner head 4 is fixed in the middle of the housing 1. The burner head 4 can adopt a porous medium burner structure. The porous medium burner can be connected to the gas pipe through the gas nozzle.

[0035] Mounting holes 16 are provided on the housing 1 located at the air inlet 2 and the air outlet 3. The mounting holes 16 are used in conjunction with bolts to assemble the housing 1 with the coating line, so that it can be directly used with the coating line. The size of the air inlet 2 needs to be designed according to the VOC waste gas flow rate and flow requirements.

[0036] Please see Figure 4 and Figure 6The air supply system includes an air supply mechanism 8 and an air guide mechanism 11. The air supply mechanism 8 includes a fan 81 and an air duct 82. The fan 81 is a centrifugal fan 81, which is fixed to the top of the housing 1. One end of the air duct 82 is connected to the centrifugal fan 81, and the other end extends into the housing 1. The end of the air duct 82 is located behind the burner head 4.

[0037] The air guiding mechanism 11 includes an air guide shroud 111 and two guide plates 112. The air guide shroud 111 is trumpet-shaped. One end of the small opening of the air guide shroud 111 is fixed to the end of the air duct 82, and one end of the large opening of the air guide shroud 111 faces the air outlet 3. The air guide shroud 111 covers the burner head 4. The two guide plates 112 are located on the upper and lower sides of the burner head 4 and are arranged in a V-shape. One end of the guide plate 112 is connected to the burner head 4 and the other end is connected to the air guide shroud 111. The two guide plates 112 sandwich the burner head 4 in the middle. The guide plates 112 are provided with a number of guide holes 113.

[0038] The airflow generated by the centrifugal fan 81 is blown into the air guide shroud 111 through the air duct 82. The air guide plate 112 blocks the airflow, and the airflow can be blown towards the burner head 4 through the guide hole 113 to provide oxygen for the combustion of the burner head 4.

[0039] Please see Figure 4 and Figure 5 The fairing 5 includes a rectifier baffle 51 and a conical shroud 52. A support frame 15 is welded and fixed on the inner wall of the housing 1. The rectifier baffle 51 is bolted to the support frame 15. The rectifier baffle 51 is a square tube and covers the conical shroud 52 inside. The conical shroud 52 has a conical structure. One end of the conical shroud 52 with a small opening is bolted to the air guide shroud 111, and one end of the conical shroud 52 with a large opening is bolted to the rectifier baffle 51. The large opening end of the conical shroud 52 faces the air outlet 3. The conical shroud 52 is provided with several air holes 53. The diameter of the air holes 53 near the burner head 4 is larger than the diameter of the air holes 53 near the air outlet 3.

[0040] Brief description of the usage process: After the VOC exhaust gas generated by the painting line enters the housing 1 through the air inlet 2, it is blocked by the rectifier baffle 51 and guided to the conical shroud 52. The air holes 53 on the conical shroud 52 guide the VOC exhaust gas to the flame concentration area of ​​the burner head 4, thereby improving the treatment effect of VOC exhaust gas.

[0041] In summary, in this invention, the exhaust gas is rectified by a rectifier and guided to the concentrated flame area of ​​the burner head. As the exhaust gas passes through the flame and the surrounding high-temperature thermal field, the volatile organic compounds in the exhaust gas are fully decomposed and discharged from the outlet, thus ensuring that the emitted exhaust gas meets environmental protection requirements. Therefore, this invention effectively overcomes the various shortcomings of existing technologies and has high industrial application value.

[0042] The above embodiments are merely illustrative of the principles and effects of this utility model and are not intended to limit the scope of this utility model. Any person skilled in the art can modify or alter the above embodiments without departing from the spirit and scope of this utility model. Therefore, all equivalent modifications or alterations made by those skilled in the art without departing from the spirit and technical concept disclosed in this utility model should still be covered by the claims of this utility model.

Claims

1. A wind tunnel combustor that self processes exhaust gas, characterized by: The shell (1) and the air inlet (2) and the air outlet (3) arranged on both sides of the shell (1) respectively; The shell (1) is provided with a combustion head (4) between the air inlet (2) and the air outlet (3); the shell (1) is provided with an air supply system for providing air for combustion of the combustion head (4); The shell (1) is fixedly provided with a flow straightener (5) for guiding VOC waste gas entering the shell (1) from the air inlet (2) to the flame concentration area of the combustion head (4) for high-temperature treatment.

2. A wind tunnel combustor that self-processes exhaust gases as set forth in claim 1, characterized in that: The air supply system comprises an air supply mechanism (8) and an air guide mechanism (11); the air supply mechanism (8) comprises a fan (81) arranged on the shell (1) and a wind pipe (82) having one end connected with the fan (81) and the other end extending into the shell (1).

3. A wind tunnel combustor that self-processes exhaust gases as defined in claim 2, characterized by: The air guide mechanism (11) comprises an air guide cover (111) fixedly connected with the end of the wind pipe (82) and covering the combustion head (4), and two guide plates (112) respectively located on the upper and lower sides of the combustion head (4); the opening of the air guide cover (111) faces the side of the air outlet (3); One end of the guide plate (112) is connected with the combustion head (4), and the other end is connected with the air guide cover (111); the guide plate (112) is provided with a plurality of guide holes (113).

4. A self-processing tail gas windbox burner according to claim 3, characterized in that: The two guide plates (112) are arranged in a V shape.

5. A self-processing tail gas windbox burner according to claim 2, characterized in that: The flow straightener (5) comprises a flow straightening pipe (51) fixed in the shell (1) and a conical cover (52) arranged inside the flow straightening pipe (51) and fixedly connected with the air guide cover (111) at one end and the flow straightening pipe (51) at the other end; The conical cover (52) is provided with a plurality of air holes (53).

6. A self-processing exhaust wind tunnel burner according to claim 5, characterized in that: The hole diameter of the air hole (53) near the side of the combustion head (4) is larger than the hole diameter of the air hole (53) near the side of the air outlet (3).

7. A self-processing tail gas windbox burner according to claim 1, characterized in that: The shell (1) at the air inlet (2) and the air outlet (3) is provided with a mounting hole (16).

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