Blast furnace top gas ignition gun

Abstract

The utility model discloses a blast furnace top gas ignition gun which comprises a combustible gas ingress pipe, a gas inlet pipe and a gas outlet pipe, and the sleeve is arranged on the periphery of the combustible gas leading-in pipe in a sleeving mode, forms an annular gas channel and is used for leading in combustion-supporting air. The air inlet pipe is used for guiding combustion-supporting air into the annular air channel; and the flow guide plates are arranged between the flaring part and the external expansion head in a surrounding manner so as to guide air to rotationally enter the mixing barrel. According to the utility model, through the ingenious combination of the combustible gas ingress pipe and the sleeve, a double-channel structure with an internal circular combustible gas channel and an external annular combustion-supporting air channel is constructed. Combustion-supporting air is guided by the guide plate to rotate at a high speed to enter the mixing barrel and be fully mixed with combustible gas, so that combustion efficiency is remarkably improved, powerful flames are sprayed out, and the powerful flames ensure that gas at the top of the blast furnace is fully mixed and efficiently combusted, and emission of poisonous gas such as carbon monoxide is effectively reduced; the safety of furnace top overhaul construction after damping down of the blast furnace is guaranteed, emission of harmful gas is reduced, and the environment-friendly requirement is met.

Description

TECHNICAL FIELD

[0001] The utility model relates to the technical field of supporting equipment of combustion furnace, in particular to a blast furnace top gas ignition gun. BACKGROUND

[0002] In the process of blast furnace ironmaking, the safe management of top gas is of great significance to ensure production safety and environmental protection. After the blast furnace is blown down, the generated gas needs to be discharged to high altitude after burning to protect the safety of the top maintenance personnel and reduce environmental pollution. However, the existing ignition gun has many shortcomings in actual application, which seriously affects the safe management of the top gas and environmental protection. First, the ignition gun of the prior art may have the problem of automatic extinguishing during ignition. This phenomenon can cause the gas to be discharged without complete combustion, thereby producing harmful gases such as carbon monoxide, which not only pollutes the environment but also increases the safety risk. SUMMARY

[0003] The utility model aims at at least solving one of the technical problems existing in the prior art. To this end, the utility model provides a blast furnace top gas ignition gun.

[0004] To achieve the above-mentioned purpose, the utility model adopts the following technical scheme:

[0005] A blast furnace top gas ignition gun, comprising: a combustible gas inlet pipe for introducing and outputting combustible gas, the output end is provided with an outwardly flared flared portion; a sleeve is sleeved on the outer periphery of the combustible gas inlet pipe, the sleeve and the outer periphery of the combustible gas inlet pipe form an annular air channel, one end of the sleeve corresponding to the flared portion is provided with an outwardly flared head, the end of the outwardly flared head away from the sleeve is provided with a mixing cylinder, the outwardly flared head is sleeved on the outer periphery of the flared portion and has a spacing to enable the gas in the annular air channel to enter the mixing cylinder, and the end of the annular air channel away from the flared portion is closed; an air inlet pipe is connected with the sleeve and communicates with the annular air channel; for introducing air into the annular air channel; a flow guide plate is arranged between the flared portion and the outwardly flared head to guide the rotation of air into the mixing cylinder.

[0006] Further, the outer periphery of one end of the combustible gas inlet pipe corresponding to the flared portion is provided with a threaded connection section; the flared portion is provided with a threaded cylinder screwing with the threaded connection section.

[0007] Further, the flow guide plate is fixedly connected to the outer peripheral wall of the flared portion, and the outer side of the flow guide plate is attached to the inner wall of the outwardly flared head.

[0008] Further, a threaded connection shaft is provided on the middle part of the combustible gas inlet pipe, and the end part of the sleeve is provided with a threaded hole screwing with the threaded connection shaft.

[0009] Furthermore, an axial limiting platform is connected to one end of the threaded connecting shaft facing away from the flared portion. The diameter of the axial limiting platform is larger than that of the threaded connecting shaft, so that the ends of the sleeve can abut against each other.

[0010] Furthermore, the outer peripheral wall of the sleeve is provided with an outwardly protruding connecting pipe head, and the center of the connecting pipe head is provided with a vent hole communicating with the annular air passage, and the air inlet pipe is connected to the connecting pipe head.

[0011] Furthermore, the intake pipe end is provided with a limiting clip, and the connecting pipe end is connected with a locking element to mate and fit the limiting clip with the connecting pipe end.

[0012] Furthermore, the locking component includes a connecting cylinder, one end of which is provided with a collar that is movably sleeved on the air intake pipe. The diameter of the central hole of the collar is smaller than the outer circumferential diameter of the limiting clamp head, and the connecting cylinder is threadedly connected to the outer circumference of the connecting pipe head.

[0013] Furthermore, a sealing gasket is sandwiched between the connector head and the end face of the intake pipe.

[0014] Furthermore, the diameter of the central hole of the collar is larger than the outer circumferential diameter of the intake pipe.

[0015] This utility model has the following beneficial effects:

[0016] By combining the combustible gas inlet pipe and the sleeve, an annular gas channel is formed, allowing air to enter and preventing flame extinguishing due to oxygen scarcity in the furnace. This ensures the continuous and complete ignition of the gas at the furnace top. Furthermore, the design of the baffle plate allows air to rotate into the mixing cylinder, where it mixes thoroughly with the combustible gas before ignition, improving combustion efficiency and ensuring complete combustion of the gas at the furnace top. This reduces emissions of harmful gases (such as carbon monoxide), meeting environmental protection requirements. The ignition gun's compact structure reduces its footprint on the furnace top, improving portability and installation flexibility, while lowering equipment complexity and maintenance costs.

[0017] In addition to the objectives, features, and advantages described above, this utility model has other objectives, features, and advantages. The present utility model will now be described in further detail with reference to the figures. Attached Figure Description

[0018] The accompanying drawings, which form part of this application, are used to provide a further understanding of the present invention. The illustrative embodiments of the present invention and their descriptions are used to explain the present invention and do not constitute an undue limitation of the present invention. In the drawings:

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

[0020] Figure 2 yes Figure 1 A sectional view;

[0021] Figure 3 yes Figure 2 Enlarged view of point A;

[0022] Figure 4 yes Figure 1 A schematic diagram of the decomposed state structure;

[0023] Figure 5 This is a schematic diagram of the exploded state structure of the combustible gas inlet pipe and the flared part.

[0024] Legend:

[0025] Combustible gas inlet pipe 100, flared part 110, threaded cylinder 111, threaded connection section 120, threaded connection shaft 130, axial limiting platform 131;

[0026] 200 sleeve, 210 annular air passage, 220 external expansion head, 221 mixing cylinder, 230 threaded hole, 240 connecting pipe head, 241 vent hole, 250 sealing gasket;

[0027] Intake pipe 300, limit clamp 310;

[0028] 400mm deflector;

[0029] Locking component 500, connecting cylinder 510, collar 520. Detailed Implementation

[0030] It should be understood that the specific embodiments described herein are merely illustrative of the present invention and are not intended to limit the present invention.

[0031] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0032] It should be noted that all directional indicators (such as up, down, left, right, front, back, etc.) in this utility model embodiment are only used to explain the relative positional relationship and movement of each component in a certain specific posture (as shown in the figure). If the specific posture changes, the directional indicator will also change accordingly.

[0033] Furthermore, the use of terms such as "first" and "second" in this utility model is for descriptive purposes only and should not be construed as indicating or implying their relative importance or implicitly specifying the number of technical features indicated. Therefore, a feature defined as "first" or "second" may explicitly or implicitly include at least one of that feature. Additionally, the technical solutions of the various embodiments can be combined with each other, but only on the basis of being achievable by those skilled in the art. When the combination of technical solutions is contradictory or impossible to implement, such a combination of technical solutions should be considered non-existent and not within the scope of protection claimed by this utility model.

[0034] Please refer to Figure 1 and Figure 2 A preferred embodiment of the present invention provides a blast furnace top gas ignition gun, comprising a combustible gas inlet pipe 100, a sleeve 200, an inlet pipe 300, and a guide plate 400.

[0035] A combustible gas inlet pipe 100 is used to introduce and output combustible gas. The output end of the combustible gas inlet pipe 100 is provided with an outwardly flared portion 110. That is, one end of the combustible gas inlet pipe 100 is used to input combustible gas, and the other end is used to output combustible gas. The end outputting combustible gas is provided with the flared portion 110. The combustible gas can be coal gas or other types of combustible gas.

[0036] A sleeve 200 is fitted around the outer periphery of the combustible gas inlet pipe 100, forming an annular gas passage 210 with the sleeve 200 and the outer periphery of the combustible gas inlet pipe 100. The annular gas passage 210 is used to introduce combustion air. One end of the sleeve 200 corresponding to the flared portion 110 is provided with an external expansion head 220. The end of the external expansion head 220 opposite to the sleeve 200 is provided with a mixing cylinder 221. The external expansion head 220 is fitted around the outer periphery of the flared portion 110 and has a gap to allow the gas in the annular gas passage 210 to enter the mixing cylinder 221. In use, the gas can be ignited at the outlet of the mixing cylinder 221. The outer expansion head 220 is fitted around the outer periphery of the flared portion 110, and a conical air passage is formed between the outer expansion head 220 and the flared portion 110, communicating with the annular air passage 210. One end of the conical air passage communicates with the annular air passage 210, and the other end communicates with the central hole of the mixing cylinder 221, thereby allowing the gas from the annular air passage 210 to enter the mixing cylinder 221. The end of the annular air passage 210 away from the flared portion 110 is sealed to prevent gas leakage at that end.

[0037] The intake pipe 300 is connected to the sleeve 200 and communicates with the annular air passage 210, and is used to introduce combustion air into the annular air passage 210; the air can be compressed gas, thereby increasing the gas filling speed.

[0038] The guide vanes 400 are arranged around the flared portion 110 and the outer flared head 220 to guide the air to rotate into the mixing cylinder 221, that is, the guide vanes 400 will guide the air to move forward in a manner that rotates along the axis of the sleeve 200.

[0039] In a preferred embodiment of this invention, a blast furnace top gas igniter cleverly combines a combustible gas inlet pipe 100 and a sleeve 200 to form an annular gas channel 210. This creates a dual-channel structure with an internal circular combustible gas channel and an external annular combustion-supporting air channel. Air can be introduced into the annular gas channel 210 to prevent flame extinguishing due to oxygen scarcity in the furnace, ensuring continuous flame ignition at the igniter and allowing the top gas to be continuously and fully ignited. Furthermore, the design of the guide plate 400 allows air to rotate into the mixing cylinder 221, where it mixes thoroughly with the combustible gas before ignition, improving combustion efficiency and ensuring complete combustion of the top gas. This reduces the emission of harmful gases (such as carbon monoxide), meeting environmental protection requirements. The igniter's overall structure is compact, reducing its footprint on the furnace top and improving portability and installation flexibility, while lowering complexity and maintenance costs. When compressed air is introduced into the annular gas duct 210, the guide vane guides the combustion-supporting air to rotate at high speed into the mixing cylinder, where it is fully mixed with the combustible gas, thereby significantly improving combustion efficiency and producing a powerful flame. This powerful flame not only ensures that the blast furnace top gas is fully mixed and burns efficiently, but also effectively reduces the emission of toxic gases such as carbon monoxide (CO), ensuring the safety of blast furnace top maintenance work after blast furnace shutdown.

[0040] Reference Figure 5 In some embodiments of this utility model, a threaded connection section 120 is provided on the outer periphery of one end of the combustible gas inlet pipe 100 corresponding to the flared portion 110; the flared portion 110 is provided with a threaded sleeve 111 that is threadedly connected to the threaded connection section 120. The threaded connection ensures a secure installation of the flared portion 110. This allows for installation by first fitting the sleeve 200 onto the combustible gas inlet pipe 100 and then installing the flared portion 110, thus preventing the flared portion 110 from interfering with the installation of the sleeve 200 and the combustible gas inlet pipe 100.

[0041] Reference Figure 5 In a further embodiment of this utility model, the guide plate 400 is fixedly connected to the outer peripheral wall of the flared portion 110, and the outer side of the guide plate 400 is in contact with the inner wall of the outer flared head 220. The guide plate 400 is fixedly connected to the outer peripheral wall of the flared portion 110 and is in contact with the inner wall of the outer flared head 220. The guide plate 400 can be installed as a whole with the flared portion 110, and compared with being fixedly installed on the inner wall of the outer flared head 220, installing it on the outer peripheral wall of the flared portion 110 makes the installation of the guide plate 400 more convenient. The guide plate 400 and the flared portion 110 can be fixedly connected by welding or fasteners.

[0042] Reference Figures 3 to 5 In a further embodiment of this utility model, a protruding threaded connecting shaft 130 is provided in the middle of the combustible gas inlet pipe 100. The diameter of the threaded connecting shaft 130 is larger than that of the combustible gas inlet pipe 100, thereby forming a side annular gas passage 210 after the sleeve 200 is installed. The end of the sleeve 200 is provided with a threaded hole 230 that is threadedly connected to the threaded connecting shaft 130. The threaded connection achieves a secure installation of the sleeve 200 and closure of the side annular gas passage 210, thereby enabling the sleeve 200 to be detachably connected and facilitating assembly.

[0043] Reference Figures 3 to 5 In a further embodiment of this utility model, an axial limiting platform 131 is connected to one end of the threaded connecting shaft 130 facing away from the flared portion 110. The diameter of the axial limiting platform 131 is larger than that of the threaded connecting shaft 130, so that the ends of the sleeve 200 can abut against each other. The limiting platform 131, which has a larger diameter than the threaded connecting shaft 130, provides stable limiting support for the sleeve 200.

[0044] Reference Figure 3 and Figure 4 In a further embodiment of this utility model, the outer peripheral wall of the sleeve 200 is provided with an outwardly protruding connecting pipe head 240, and the center of the connecting pipe head 240 is provided with a vent hole 241 communicating with the annular air passage 210. The air inlet pipe 300 is connected to the connecting pipe head 240. The connecting pipe head 240 facilitates the connection between the sleeve 200 and the external pipeline, thereby enabling the annular air passage 210 to be filled with compressed air.

[0045] Reference Figure 3 and Figure 4 In a further embodiment of this utility model, a limiting clip 310 is provided at the end of the air intake pipe 300, and a locking member 500 is connected to the connecting pipe 240 to mate and fit the limiting clip 310 with the connecting pipe 240. The locking member 500 securely connects the air intake pipe 300 and the connecting pipe 240. This improves the connection stability between the air intake pipe 300 and the sleeve 200, and also reduces the loosening of components due to external forces through the locking effect of the locking member 500.

[0046] Reference Figure 3 and Figure 4In a further embodiment of this utility model, the locking member 500 includes a connecting cylinder 510. One end of the connecting cylinder 510 is provided with a collar 520 that is movably sleeved on the air intake pipe 300. The diameter of the central hole of the collar 520 is smaller than the outer circumferential diameter of the limiting clamp 310. The connecting cylinder 510 is threadedly connected to the outer circumference of the connecting pipe head 240. Through the threaded connection between the connecting cylinder 510 and the connecting pipe head 240, and the collar 520 pressing against the limiting clamp 310, the air intake pipe 300 and the connecting pipe head 240 are tightly connected, ensuring airtightness. Installation and disassembly are simple; when the air intake pipe 300 and the connecting pipe head 240 are connected, neither needs to rotate. Only the connecting cylinder 510 needs to be screwed on, making the operation simpler and eliminating the need for pipe rotation to achieve the threaded connection. It is understood that, to reduce resistance, the diameter of the central hole of the collar 520 is larger than the outer circumferential diameter of the air intake pipe 300, with a clearance fit between them to reduce wear and resistance. Similarly, in order to reduce wear and resistance, the outer diameter of the limiting head 310 is smaller than the diameter of the center hole of the connecting cylinder 510, so that the inner wall of the center hole of the connecting cylinder 510 will not come into contact with the limiting head 310 and wear, thus avoiding the wear off of the threads of the center hole of the connecting cylinder 510.

[0047] Reference Figure 3 and Figure 4 In a further embodiment of this utility model, a sealing gasket 250 is sandwiched between the connector 240 and the end face of the air inlet pipe 300. The sealing effect of the sealing gasket 250 reduces air leakage when entering the annular air passage 210, thus improving the sealing performance of the equipment.

[0048] The above are merely preferred embodiments of this utility model and are not intended to limit the scope of this utility model. Various modifications and variations can be made to this utility model by those skilled in the art. Any modifications, equivalent substitutions, or improvements made within the spirit and principles of this utility model should be included within the protection scope of this utility model.

Claims

1. A blast furnace top gas ignition lance, characterized in that The application relates to a combustible gas introduction pipe. The combustible gas introduction pipe (100) is provided with a threaded connection section (120) on the outer periphery of one end corresponding to the flared part (110); the flared part (110) is provided with a threaded cylinder (111) which is screwed with the threaded connection section (120). The flow guide plate (400) is fixedly connected to the outer peripheral wall of the flared part (110), and the outer side of the flow guide plate (400) is attached to the inner wall of the outer flange (220). The combustible gas introduction pipe (100) is provided with a threaded connection shaft (130) which is protruded in the middle; the end of the sleeve pipe (200) is provided with a threaded hole (230) which is screwed with the threaded connection shaft (130). The end of the threaded connection shaft (130) away from the flared part (110) is connected with an axial limiting table (131), and the diameter of the axial limiting table (131) is larger than that of the threaded connection shaft (130) so that the end of the sleeve pipe (200) is abutted.

2. The blast furnace top gas ignition lance according to claim 1, characterized in that The outer peripheral wall of the sleeve pipe (200) is provided with an outwardly protruded butt joint pipe head (240), the center of the butt joint pipe head (240) is provided with a gas passage hole (241) which is communicated with the annular air channel (210), and the air inlet pipe (300) is butt jointed with the butt joint pipe head (240).

3. The blast furnace top gas ignition lance according to claim 2, characterized in that The end of the air inlet pipe (300) is provided with a limiting clamp head (310), the butt joint pipe head (240) is connected with a locking member (500) so that the limiting clamp head (310) is butt jointed and attached to the butt joint pipe head (240).

4. The blast furnace top gas ignition lance of claim 1, wherein, The locking member (500) comprises a connecting cylinder (510), one end of the connecting cylinder (510) is provided with a sleeve ring (520) which is movably sleeved on the air inlet pipe (300), the center hole diameter of the sleeve ring (520) is smaller than the outer peripheral diameter of the limiting clamp head (310), and the connecting cylinder (510) is screwed on the outer periphery of the butt joint pipe head (240).

5. The blast furnace top gas ignition lance according to claim 4, characterized in that The butt joint pipe head (240) and the end face of the air inlet pipe (300) are clamped with a sealing gasket (250).

6. The blast furnace top gas ignition lance of claim 1, wherein, The center hole diameter of the sleeve ring (520) is larger than the outer peripheral diameter of the air inlet pipe (300).

7. The blast furnace top gas ignition lance according to claim 6, characterized in that ​ 8. The blast furnace top gas ignition lance according to claim 7, characterized in that ​ 9. The blast furnace top gas ignition lance according to claim 8, characterized in that ​ 10. The blast furnace top gas ignition lance of claim 8, wherein, ​

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