Burner for vertical carbonization furnace

Abstract

The utility model provides a burner for a vertical carbonization furnace, which belongs to the technical field of coal dry distillation and comprises an air inlet, a coal gas inlet, a contraction section, a mixing section, a perforated plate and a diffusion section. The other end of the contraction section is sequentially connected with the mixing section and the diffusion section, and a perforated plate is arranged between the mixing section and the diffusion section. The contraction section is composed of two reducer pipes, an air pipeline is arranged inside the contraction section, a gas pipeline is arranged outside the contraction section, one end of the internal air pipeline is conical and located in the external gas pipeline, and the other end of the internal air pipeline extends out of the end of the gas pipeline. According to the utility model, the mixing section is arranged behind the contraction section, so that air and coal gas are uniformly mixed; the perforated plate is arranged at the joint of the mixing section and the diffusion section, so that the flow speed and the flow direction of the fluid can be dispersed, and the fluid can be more uniformly distributed in the whole space after passing through the perforated plate.

Description

Technical Field

[0001] The utility model belongs to the technical field of coal dry distillation, and particularly relates to a burner for a vertical carbonization furnace. Background Art

[0002] Low-rank coal refers to coal with a long, smoky flame and a low degree of coalification. The graded and quality-based comprehensive utilization of low-rank coal is crucial to building an energy structure. Low-rank coal is suitable for medium- and low-temperature retorting. This process, which converts low-rank coal into gas, liquid, and solid products, offers significant economic and social benefits.

[0003] Medium and low temperature carbonization technology is a technology that is currently widely recognized and valued. It refers to the process of heating coal to 500~700℃ in an airless environment or with a small amount of air, and decomposing it to produce coal gas, tar and semi-coke.

[0004] The dry distillation process device is the main equipment in the low-temperature dry distillation production process. It is divided into external heating type and internal heating type according to its heating method. At present, the domestic low-temperature dry distillation pyrolysis process of low-rank coal mainly uses the internal heating vertical carbonization furnace. In the semi-coke production process, the gas distribution inside the vertical carbonization furnace has a great influence on the product quality. If the gas distribution is uneven, it will cause some products to have high volatile matter and the quality deviation of the same batch of products will be large.

[0005] A search revealed an existing patent (publication number: CN2603084Y) that discloses an internal-external heating vertical carbonization furnace suitable for gas coal coking. The carbonization furnace is a vertical furnace with a truncated cone-shaped carbonization chamber. Internally heated combustion chambers are symmetrically located on either side of the carbonization chamber. These chambers are equipped with fire blocks and burners on one side. The partition wall between the internal and carbonization chambers features two air vents for each chamber. An externally heated combustion chamber, providing auxiliary heating, is located above the internal combustion chambers. An auxiliary coal box is located at the top of the furnace, and a coke discharge trough is located at the bottom. Iron guards are located around the furnace. This utility model offers the following advantages: smooth material flow within the furnace, no stuck or hanging material, and normal furnace operation. The furnace boasts good air permeability, uniform material heating, rapid heating, simple operation, high output, low investment, and excellent economic benefits, making it easy to commercialize.

[0006] At present, the burner of the vertical carbonization furnace is composed of an air inlet and a contraction section. A swirl device is added to the contraction section to mix the gas and air evenly, but the mixed gas has the problem of uneven gas distribution in the mixed gas duct. Utility Model Content

[0007] In order to overcome the problem of uneven distribution of the mixed gas in the mixed gas duct caused by adding a swirl device to the contraction section to mix the gas and air evenly, the utility model provides a burner for a vertical carbonization furnace. The utility model arranges a porous plate at the connection between the mixing section and the diffusion section, which can disperse the flow rate and flow direction of the fluid, so that the fluid can be more evenly distributed in the entire space after passing through the porous plate.

[0008] The technical solution adopted by this utility model is:

[0009] A burner for an upright carbonization furnace includes an air inlet, a gas inlet, a contraction section, a mixing section, a porous plate and a diffusion section. The air inlet and the gas inlet are respectively connected to one end of the contraction section through corresponding pipes, and the other end of the contraction section is connected to the mixing section and the diffusion section in sequence. A porous plate is provided between the mixing section and the diffusion section.

[0010] The contraction section is composed of two reducers, the inner part is an air pipe and the outer part is a gas pipe. One end of the inner air pipe is conical and located inside the outer gas pipe, and the other end extends out of the end of the gas pipe.

[0011] The angle a of the internal air pipeline reducer is 5° to 12°, and the angle b of the external gas pipeline reducer is 1° to 5°.

[0012] The straight pipe length of the mixing section is 100-500 mm.

[0013] The opening area of the porous plate is 30% to 70%.

[0014] The porous plate is connected to the straight pipe of the mixing section by welding.

[0015] The internal dimensions of the diffusion section, width and height, are the same as those of the internal mixed gas channel of the vertical carbonization furnace, and the length of the diffusion section is 100-500 mm.

[0016] The air inlet and the gas inlet are connected to the corresponding air main pipe and gas main pipe respectively.

[0017] Beneficial effects of the utility model:

[0018] In the utility model, the contraction section is arranged at the end of the air inlet pipe, and the air flow rate is increased by reducing the diameter, so that the gas and air are mixed evenly.

[0019] In the utility model, the mixing section is arranged after the contraction section, and its function is to make the air and the gas mix evenly.

[0020] The porous plate in the utility model is arranged at the connection between the mixing section and the diffusion section, and its function is to disperse the flow velocity and flow direction of the fluid so that the fluid can be more evenly distributed in the entire space after passing through the porous plate.

[0021] The straight pipe length of the mixing section in the utility model is 100-500 mm, and the distance of the mixing section is sufficient to mix the gas and air evenly.

[0022] The angle a of the reducer of the air duct in the contraction section of the utility model is 5° to 12°, so that the air flow rate after passing through the contraction tube reaches 30 to 70 m / s. The increased air flow rate is conducive to uniform mixing of air and gas. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] The present invention will be described in further detail below with reference to the accompanying drawings.

[0024] Figure 1 It is a schematic diagram of the burner structure.

[0025] In the figure, the accompanying drawings are marked as follows:

[0026] 1. Air inlet; 2. Gas inlet; 3. Contraction section; 4. Mixing section; 5. Perforated plate; 6. Diffusion section. DETAILED DESCRIPTION

[0027] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the embodiments described are part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0028] The accompanying drawings illustrate various schematic diagrams of structures according to embodiments disclosed herein. These figures are not drawn to scale; for clarity, some details are exaggerated and some details may be omitted. The shapes, relative sizes, and positional relationships of the various regions and layers shown in the figures are merely exemplary and may deviate in practice due to manufacturing tolerances or technical limitations. Those skilled in the art may design regions / layers with different shapes, sizes, and relative positions as needed.

[0029] Example 1:

[0030] A burner for an upright carbonization furnace includes an air inlet 1, a gas inlet 2, a contraction section 3, a mixing section 4, a porous plate 5 and a diffusion section 6. The air inlet 1 and the gas inlet 2 are respectively connected to one end of the contraction section 3 through corresponding pipes, and the other end of the contraction section 3 is connected to the mixing section 4 and the diffusion section 6 in sequence. A porous plate 5 is provided between the mixing section 4 and the diffusion section 6.

[0031] like Figure 1As shown, in this utility model, the air inlet 1 and the gas inlet 2 are connected to the corresponding air and gas mains, respectively. After the gas and air are evenly mixed in this burner device, uniform gas distribution is achieved in the mixed gas duct. The burner provided by this utility model connects to the mixed gas duct to achieve uniform mixing and distribution of the incoming gas.

[0032] The burner for the vertical carbonization furnace provided by the utility model can fully and evenly mix the coal gas and air, and the mixed gas can be evenly distributed in the mixed gas channel.

[0033] In the present invention, the contraction section 3 is arranged at the end of the air inlet pipe. The main principle is the venturi tube, which increases the air flow rate by reducing the diameter so that the gas and air are mixed evenly.

[0034] In the present invention, the mixing section 4 is arranged after the contraction section 3 to uniformly mix the air and gas. The porous plate 5 is arranged at the junction of the mixing section 4 and the diffusion section 6 to disperse the flow rate and direction of the fluid, so that the fluid can be more evenly distributed throughout the space after passing through the porous plate 5.

[0035] Example 2:

[0036] Based on Example 1, in this embodiment, preferably, the contraction section 3 is composed of two reducers, the inner part is an air pipe, and the outer part is a gas pipe. One end of the inner air pipe is conical and is located inside the outer gas pipe, and the other end extends out of the end of the gas pipe.

[0037] In the present invention, the contraction section 3 is arranged at the end of the air inlet pipe. The main principle is the venturi tube, which increases the air flow rate by reducing the diameter so that the gas and air are mixed evenly.

[0038] Preferably, the angle a of the internal air duct reducer is 5° to 12°, and the angle b of the external gas duct reducer is 1° to 5°.

[0039] In the present invention, the angle a of the air pipe reducer inside the contraction section 3 is 5°~12°, and the angle b of the gas pipe reducer outside is 1~5°. Such angle settings make the air flow rate after passing through the contraction tube of the contraction section 3 30~70m / s, and the gas flow rate 7~15m / s.

[0040] In the present invention, the angle b of the external gas pipeline reducer is preferably 2°, 3°, or 4°; the angle a of the internal air pipeline reducer is preferably 6°, 7°, 8°, 9°, 10°, or 11°. The angle range mainly enables the air flow rate after passing through the contraction tube to reach 30 to 70 m / s. The increased air flow rate is conducive to uniform mixing of air and gas.

[0041] Preferably, the straight tube length of the mixing section 4 is 100-500 mm.

[0042] In this utility model, the mixing section 4 is located after the contraction section 3. Its primary function is to uniformly mix the air and gas. Software simulations and field tests have been conducted based on the carbonization furnace size and the distance between the carbonization furnaces, using a 300mm spacing. Software simulations have also shown that a range of 100-500mm can also meet the requirements. Adjusting the carbonization furnace size and the distance between the furnaces can also adjust the mixer size. If the mixing section 4 is too short, less than 100mm, the gas and air will mix unevenly.

[0043] Preferably, the opening area of the porous plate 5 is 30% to 70%.

[0044] Preferably, the porous plate 5 is connected to the straight pipe of the mixing section 4 by welding.

[0045] In the present invention, the porous plate 5 is arranged at the connection between the mixing section 4 and the diffusion section 6. Its main function is to disperse the flow rate and flow direction of the fluid so that the fluid can be more evenly distributed in the entire space after passing through the porous plate 5.

[0046] Preferably, the internal dimensions of the diffusion section 6, in terms of width and height, are the same as those of the internal mixing gas channel of the vertical carbonization furnace, and the length of the diffusion section 6 is 100-500 mm.

[0047] In the present invention, the internal dimensions of the diffuser section 6, width and height, are identical to those of the mixing duct. The preferred length of the diffuser section 6 is 100 mm, 150 mm, 200 mm, 250 mm, 300 mm, 350 mm, 400 mm, 450 mm, or 500 mm. Software simulations and field tests have been conducted using a 300 mm length based on the size and spacing of the carbonization furnaces. Software simulations have also shown that a range of 100 to 500 mm can also meet the requirements. Adjusting the size and spacing of the carbonization furnaces allows for the mixer size to be adjusted.

[0048] This utility model has a simple structure. The porous plate 5 is located at the junction of the mixing section 4 and the diffuser section 6. Its main function is to disperse the flow rate and direction of the fluid, so that the fluid can be more evenly distributed throughout the space after passing through the porous plate 5. This utility model ensures that the gas and air are fully mixed and evenly distributed in the mixing gas channel, facilitating subsequent processing.

[0049] Preferably, the air inlet 1 and the gas inlet 2 are connected to the corresponding air main and gas main respectively.

[0050] In the present invention, the air inlet 1 and the gas inlet 2 are connected to the corresponding air main and gas main, respectively. The inlet gas is mixed and evenly distributed. The burner provided by the present invention is connected to the mixed gas duct of the carbonization furnace. In the present invention, the contraction section 3 is arranged at the end of the air inlet pipe, and the air flow rate is increased by reducing the diameter, so that the gas and air are mixed evenly. The mixing section 4 is arranged after the contraction section 3 to mix the air and gas evenly. The porous plate 5 is arranged at the connection between the mixing section 4 and the diffusion section 6, which can disperse the fluid flow rate and flow direction, so that the fluid can be more evenly distributed in the entire space after passing through the porous plate 5.

[0051] In the utility model, after the coal gas and air are evenly mixed through the burner device, even gas distribution in the mixed gas channel of the carbonization furnace can be achieved.

[0052] In the description of this utility model, it should be noted that, unless otherwise expressly specified or limited, the terms "mounted," "connected," and "connected" should be understood in a broad sense. For example, they can refer to fixed connections, detachable connections, or integral connections; mechanical connections, electrical connections; direct connections, indirect connections through an intermediate medium, and internal communication between two components. Those skilled in the art will understand the specific meanings of the above terms in this utility model based on the specific circumstances.

[0053] It should also be understood that the terms used in this specification are only for the purpose of describing specific embodiments and are not intended to limit the present invention. As used in this specification and the appended claims, the singular forms "a", "an" and "the" are intended to include plural forms unless the context clearly indicates otherwise.

[0054] The above examples are merely illustrative of the present invention and do not limit the scope of protection of the present invention. Any design that is identical or similar to the present invention falls within the scope of protection of the present invention. The device structures and method steps not described in detail in the present invention are prior art and will not be further described in the present invention.

Claims

1. A burner for a vertical carbonization furnace, characterized by: The invention comprises an air inlet (1), a gas inlet (2), a contraction section (3), a mixing section (4), a porous plate (5) and a diffusion section (6), wherein the air inlet (1) and the gas inlet (2) are respectively connected to one end of the contraction section (3) through corresponding pipes, and the other end of the contraction section (3) is connected to the mixing section (4) and the diffusion section (6) in sequence, and a porous plate (5) is provided between the mixing section (4) and the diffusion section (6).

2. The burner for a vertical carbonization furnace according to claim 1, characterized in that: The contraction section (3) is composed of two reducers, the inner portion is an air duct and the outer portion is a gas duct. One end of the inner air duct is conical and located inside the outer gas duct, and the other end extends out of the end of the gas duct.

3. The burner for a vertical carbonization furnace according to claim 2, characterized in that: The angle a of the internal air pipeline reducer is 5° to 12°, and the angle b of the external gas pipeline reducer is 1° to 5°.

4. The burner for a vertical carbonization furnace according to claim 1, characterized in that: The straight tube length of the mixing section (4) is 100-500 mm.

5. The burner for a vertical carbonization furnace according to claim 1, characterized in that: The opening area of the porous plate (5) is 30% to 70%.

6. The burner for a vertical carbonization furnace according to claim 1, characterized in that: The porous plate (5) is connected to the straight pipe of the mixing section (4) by welding.

7. The burner for a vertical carbonization furnace according to claim 1, characterized in that: The internal dimensions of the diffusion section (6) are the same in width and height as those of the internal mixed gas passage of the vertical carbonization furnace, and the length of the diffusion section (6) is 100-500 mm.

8. The burner for a vertical carbonization furnace according to claim 1, characterized in that: The air inlet (1) and the gas inlet (2) are connected to the corresponding air main pipe and gas main pipe respectively.

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