Dual-purpose burner for hot dirty gas and natural gas

By designing a dual-purpose burner for hot and dirty gas and natural gas, the problem of long-term production shutdown during gas switching is solved, the combustion air-fuel ratio and the steel output capacity of the heating furnace are ensured, and the effective recovery of tar and the long-term use of burner is achieved.

CN222881168UActive Publication Date: 2025-05-16TANGSHAN HUADING TECH DEV CO LTD
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Patent Information

Application Number
CN202421736477.1
Authority / Receiving Office
CN · China
Patent Type
Utility models(China)
Current Assignee / Owner
Filing Date
2024-07-22
Publication Date
2025-05-16
Estimated Expiration
2034-07-22

AI Technical Summary

Technical Problem

Existing burners need to shut down the furnace and replace the burner when switching hot dirty gas and natural gas, resulting in long-term shutdown and furnace wall fire penetration.

Method used

A hot-dirty gas and natural gas burner is designed, which adopts a removable connection between the air shell and the hot-dirty gas shell, combining the natural gas core tube and sealing assembly to ensure the combustion capacity and sealing of the burner during gas switching.

Benefits of technology

It solves the problem of long-term production shutdown during gas switching, ensures the air-fuel ratio of combustion, reduces the precipitation and recovery of tar, reduces the impact of tar on the burner, and ensures the steel output capacity of the heating furnace.

✦ Generated by Eureka AI based on patent content.

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Abstract

The utility model relates to a burner, in particular to a hot dirty gas and natural gas dual-purpose burner. Comprising an air shell, a hot dirty gas shell, an air inlet pipe and a hot dirty gas inlet pipe, the hot dirty gas inlet pipe and the air inlet pipe are arranged at the inlet end of the hot dirty gas shell and the inlet end of the air shell in the radial direction respectively, and the hot dirty gas shell is sleeved with the air shell and detachably connected with the air shell. The inlet end of the hot dirty gas shell is fixedly connected with a sealing plate with a central hole, the natural gas core tube penetrates through the central hole and extends into the hot dirty gas shell, and the natural gas core tube is detachably connected with the sealing plate through a sealing assembly; and a natural gas spray head is mounted at the outlet end of the natural gas core pipe. According to the utility model, the problem of singleness of a special burner is solved, good air-fuel ratio of two kinds of fuel gas is ensured, waste of one kind of fuel gas is not caused, the burning capacity of the burner is ensured after the fuel gas is switched, and the tapping capacity of a heating furnace is not influenced.
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Description

Technical Field

[0001] The utility model relates to a burner, in particular to a burner nozzle for hot dirty coal gas and natural gas. Background Art

[0002] The heating furnace of the steel rolling mill is equipped with a special burner. The steel rolling mill has two kinds of gas reserves, namely coal gas and natural gas. In order to save energy, the two kinds of gas will be switched. If the other gas is replaced, due to the different air-fuel ratios of the two gases, continuing to use the special burner will lead to incomplete combustion, gas waste, and increased billet heating time. If the burner is replaced, the furnace must be stopped and replaced. In order to reduce costs, some steel rolling mills use hot dirty coal gas, which is also called hot dirty generator gas. It uses the coal generator to convert coal into gas fuel, that is, generator gas. It has many impurities and is easy to precipitate tar at low temperatures, which is easy to clog the burner. It is generally a special burner. When switching between hot dirty coal gas and natural gas, the furnace must be stopped and replaced. The Chinese utility model with the authorization announcement number CN216790179 discloses a high-efficiency and energy-saving burner for both coal gas and natural gas. The utility model cannot use hot dirty coal gas. Utility Model Content

[0003] The utility model aims to solve the above technical problems, thereby providing a dual-purpose burner for hot dirty coal gas and natural gas, and solving the problem of long-term production and furnace shutdown caused by replacing special burners.

[0004] The utility model solves the technical problem and adopts the following technical solution:

[0005] A hot dirty gas and natural gas dual-purpose burner comprises an air shell, a hot dirty gas shell, an air inlet pipe and a hot dirty gas inlet pipe, wherein the hot dirty gas inlet pipe and the air inlet pipe are radially fixed to the inlet ends of the hot dirty gas shell and the air shell respectively.

[0006] The air shell is sleeved on the hot dirty gas shell and is detachably connected to the hot dirty gas shell. The inlet end of the hot dirty gas shell is fixedly connected with a sealing plate with a center hole. The natural gas core pipe passes through the center hole and extends into the hot dirty gas shell. The natural gas core pipe is detachably connected to the sealing plate through a sealing component; a natural gas nozzle is installed at the outlet end of the natural gas core pipe.

[0007] Compared with the prior art, the utility model adopting the above technical solution has the following beneficial effects:

[0008] 1) It solves the problem of the singleness of a certain special burner, ensures that both types of gas have a good air-fuel ratio, and does not cause waste of a certain type of gas; it also solves the problems of long-term production stoppage caused by burner replacement and furnace wall fire penetration caused by the deterioration of the sealing between the furnace wall and the burner. The combustion capacity of the burner is guaranteed after switching the gas, and it will not affect the steel-making capacity of the heating furnace;

[0009] 2) In view of the characteristics of hot dirty gas, the precipitation of hot dirty gas tar is minimized and can be recovered after precipitation. In addition, the natural gas core tube is a detachable component, which effectively reduces the impact of tar on the burner.

[0010] Further, the optimization scheme of the utility model is:

[0011] The hot dirty gas shell includes, from outside to inside, an outer straight pipe portion, a contracted pipe portion, an inner straight pipe portion and an expanded pipe portion.

[0012] An air swirl assembly is provided at the front end of the hot dirty gas shell, and the air swirl assembly includes a swirl sleeve and a swirl plate. The swirl sleeve is fixed to the front end of the expanded pipe portion, and a swirl plate is provided on the outer circumferential surface of the swirl sleeve. An angle is provided between the plate surface of the swirl plate and the axis of the swirl sleeve.

[0013] The inner end of the air shell is fixedly connected with a cone tube portion, the inner end of the cone tube portion is fixedly connected with a positioning sleeve, and the outer circumferential surface of the positioning sleeve is fixedly connected with a mounting plate.

[0014] The outer end of the air housing is fixedly connected with a first flange, and the hot and dirty gas housing is fixedly connected with a second flange connected with the first flange.

[0015] The sealing assembly includes a fixed sleeve, a movable sleeve, a third flange, a fourth flange and a sealing ring. The fixed sleeve is fixedly connected to the center hole of the sealing plate, the outer end of the fixed sleeve is fixedly connected to the third flange, the inner end of the axial hole of the fixed sleeve is provided with an inner flange structure, the movable sleeve is inserted into the fixed sleeve, a sealing ring is installed between the inner end of the movable sleeve and the fixed sleeve, and the outer end of the movable sleeve is fixedly connected to the fourth flange.

[0016] The hot dirty gas shell is provided with a radial tar recovery pipe, and the tar recovery pipe and the hot dirty gas inlet pipe are arranged symmetrically.

[0017] The natural gas nozzle of the natural gas core pipe is located in the expanded pipe portion of the hot dirty gas shell.

[0018] When hot dirty gas is used alone, the natural gas core pipe extends outward, and the natural gas nozzle of the natural gas core pipe is located on the inner side of the sealing plate.

[0019] The air inlet pipe corresponds to the contracted pipe portion of the hot dirty gas shell. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 It is a front view of an embodiment of the utility model;

[0021] Figure 2 for Figure 1 AA section view;

[0022] Figure 3It is a schematic diagram of a hot dirty gas shell and a natural gas core pipe according to an embodiment of the utility model;

[0023] Figure 4 This is a schematic diagram of an air housing according to an embodiment of the utility model;

[0024] Figure 5 A schematic diagram of a natural gas core tube according to an embodiment of the utility model;

[0025] Figure 6 for Figure 2 Figure B of

[0026] Figure 7 Schematic diagram of using hot dirty gas alone.

[0027] In the figure: hot dirty gas shell 1; outer straight pipe part 1-1; reduced end pipe part 1-2; inner straight pipe part 1-3; expanded end pipe part 1-4; sealing plate 1-5; hot dirty gas inlet pipe 2; air shell 3; conical pipe part 3-1; air inlet pipe 4; positioning sleeve 5; mounting plate 6; first flange 7; second flange 8; natural gas core pipe 9; natural gas nozzle 9-1; fixed sleeve 10; movable sleeve 11; third flange 12; fourth flange 13; sealing ring 14; swirl sleeve 15; swirl plate 16; tar recovery pipe 17; recovery barrel 18. DETAILED DESCRIPTION

[0028] The technical solutions in the embodiments of the present invention will be described clearly and completely below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all of the embodiments.

[0029] In the description of the present invention, it should be understood that the terms "upper", "lower", "front", "back", "left", "right", "top", "bottom", "inside", "outside", etc., indicating directions or positional relationships, are based on the directions or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific direction, be constructed and operated in a specific direction, and therefore should not be understood as a limitation on the present invention.

[0030] See also Figure 1-Figure 6The present embodiment provides a dual-purpose burner for hot dirty gas and natural gas, which is mainly composed of a hot dirty gas shell 1, a hot dirty gas inlet pipe 2, an air shell 3, an air inlet pipe 4 and a natural gas core pipe 9. The hot dirty gas shell 1 is mainly composed of an outer straight pipe portion 1-1, a reduced pipe portion 1-2, an inner straight pipe portion 1-3 and an expanded pipe portion 1-4 from outside to inside. The reduced pipe portion 1-2 and the expanded pipe portion 1-4 are both tapered pipes, and the outer diameter of the inner straight pipe portion 1-3 is smaller than the outer diameter of the outer straight pipe portion 1-1. The outer port of the outer straight pipe portion 1-1 is sealed and welded with a sealing plate 1-5, and the sealing plate 1-5 is provided with a center hole. The outer end of the outer straight pipe portion 1-1 is radially welded with a hot dirty gas inlet pipe 2 connected thereto, and the outer pipe opening of the hot dirty gas inlet pipe 2 is installed with a hot dirty gas valve through a flange.

[0031] The air housing 3 is sleeved on the hot dirty gas housing 1. The outer end of the air housing 3 is radially welded with an air inlet pipe 4 connected thereto. The air inlet pipe 4 corresponds to the shrink pipe portion 1-2 of the hot dirty gas housing 1. The outer pipe opening of the air inlet pipe 4 is equipped with an air valve through a flange. The inner end of the air housing 3 is welded with a cone pipe portion 3-1, the outer end of the cone pipe portion 3-1 is welded with a positioning sleeve 5, and the root of the outer circumferential surface of the positioning sleeve 5 is welded with a mounting plate 6. The outer end of the air housing 3 is welded with a first flange 7, and the hot dirty gas housing 1 is welded with a second flange 8. The first flange 7 and the second flange 8 are connected by bolts, and a sealing gasket is provided between the first flange 7 and the second flange 8. The air housing 3 and the hot dirty gas housing 1 are detachably connected, so that the air housing 3 and the hot dirty gas housing 1 can be easily cleaned.

[0032] The natural gas core pipe 9 passes through the central hole of the sealing plate 1-5 and extends into the hot dirty gas shell 1. The natural gas core pipe 9 is coaxially arranged with the hot dirty gas shell 1. A natural gas nozzle 9-1 is installed at the inner end of the natural gas core pipe 9. The natural gas nozzle 9-1 is composed of a sleeve portion and a frustum portion. Both the sleeve portion and the frustum portion are provided with spray holes. The natural gas nozzle 9-1 is located in the expanded pipe portion 1-4 of the hot dirty gas shell 1. A natural gas valve is installed at the outer end of the natural gas core pipe 9 through a flange.

[0033] The natural gas core pipe 9 is connected to the sealing plate 1-5 through a connecting assembly, which is mainly composed of a fixed sleeve 10, a movable sleeve 11, a third flange 12, a fourth flange 13 and a sealing ring 14. The inner end of the fixed sleeve 10 is sealed and welded with the center hole of the sealing plate 1-5. The inner end of the axial hole of the fixed sleeve 10 is conical. The outer end of the fixed sleeve 10 is welded with a third flange 12. The movable sleeve 11 is inserted into the fixed sleeve 10. The inner end of the fixed sleeve 10 is provided with an inner flange structure, and the inner end surface of the inner flange structure is conical. The outer end of the movable sleeve 11 is welded with a fourth flange 13. A sealing ring 14 is installed between the inner end of the movable sleeve 11 and the fixed sleeve 10. The natural gas core pipe 9 is inserted into the movable sleeve 11, the sealing ring 14 and the fixed sleeve 10. A gap is left between the third flange 12 and the fourth flange 13, and bolts are tightened to make the fourth flange 13 approach the third flange 12, so that the movable sleeve 11 presses the sealing ring 14, and the sealing ring 14 is radially deformed, thereby sealing the natural gas core pipe 9 and the fixed sleeve 10 to prevent gas leakage. The natural gas core pipe 9 is detachably connected to the hot dirty gas shell 1, and the natural gas core pipe 9 can be taken out, which is convenient for cleaning the coal tar on the natural gas core pipe 9, avoiding the coal tar adhering thereto and causing blockage, and ensuring the combustion effect.

[0034] Hot air is passed into the air shell 3. In order to increase the mixing effect of hot air and hot dirty gas or natural gas, an air swirl assembly is provided at the inner end of the hot dirty gas shell 1. The air swirl assembly is composed of a swirl sleeve 15 and a swirl plate 16. The swirl sleeve 15 is welded to the front end of the expanded pipe portion 1-4 of the hot dirty gas shell 1. The swirl plate 16 is welded to the outer circumferential surface of the swirl sleeve 15. An angle is provided between the plate surface of the swirl plate 16 and the axis of the swirl sleeve 15. In order to enhance the mixing effect and improve the combustion efficiency, the swirl plate 16 is provided with two circles.

[0035] In order to facilitate the collection of impurities in the hot dirty gas, the hot dirty gas shell 1 is provided with a tar recovery pipe 17, which is radially welded and connected to the hot dirty gas shell 1, and the tar recovery pipe 17 and the hot dirty gas inlet pipe 2 are symmetrically arranged, and the outer pipe mouth of the tar recovery pipe 17 is connected to the recovery barrel 18 through a flange.

[0036] When the heating furnace is switched to natural gas ( Figure 1 As shown in the figure), the hot dirty gas flow is gradually reduced through the hot dirty gas valve until it is completely closed. The air valve of the air inlet pipe 4 also gradually reduces the flow as the hot dirty gas is reduced. The hot dirty gas main pipeline cut-off valve is closed, and the natural gas valve of the natural gas core pipe 9 is opened. The natural gas ignition is performed in accordance with the relevant operating procedures. The air pipeline and natural gas pipeline valves are adjusted to adjust the flow to achieve the best combustion state. The gas switching is completed, and the original hot dirty gas pipeline is purged and released to eliminate safety hazards such as gas leakage.

[0037] When the heating furnace gas is switched to hot dirty gas ( Figure 7As shown), close the natural gas valve of the natural gas core pipe 9 and the air valve of the air inlet pipe 4, loosen the connecting assembly, pull the natural gas core pipe 9 outward, the natural gas nozzle 9-1 of the natural gas core pipe 9 is located on the inner side of the sealing plate 1-5, tighten the connecting assembly, open the air valve of the air inlet pipe 4 and the hot dirty gas valve of the hot dirty gas inlet pipe 2.

[0038] The above shows and describes the basic principle and main features of the utility model and the advantages of the utility model. The technicians in this industry should understand that the utility model is not limited by the above embodiments, and the above embodiments and descriptions are only for explaining the principle of the utility model. Without departing from the spirit and scope of the utility model, the utility model will have various changes and improvements, and these changes and improvements fall within the scope of the utility model to be protected.

Claims

1. A hot dirty gas and natural gas dual-purpose burner, comprising an air housing, a hot dirty gas housing, an air inlet pipe and a hot dirty gas inlet pipe, wherein the hot dirty gas inlet pipe and the air inlet pipe are radially arranged at the inlet ends of the hot dirty gas housing and the air housing, respectively, and characterized in that: The air shell is sleeved on the hot dirty gas shell and is detachably connected to the hot dirty gas shell. The inlet end of the hot dirty gas shell is fixedly connected with a sealing plate with a center hole. The natural gas core pipe passes through the center hole and extends into the hot dirty gas shell. The natural gas core pipe is detachably connected to the sealing plate through a sealing component; a natural gas nozzle is installed at the outlet end of the natural gas core pipe.

2. The hot dirty coal gas and natural gas dual-purpose burner according to claim 1 is characterized in that: The hot dirty gas shell includes, from outside to inside, an outer straight pipe portion, a contracted pipe portion, an inner straight pipe portion and an expanded pipe portion.

3. The hot dirty coal gas and natural gas dual-purpose burner according to claim 1 is characterized in that: An air swirl assembly is provided at the front end of the hot dirty gas shell, and the air swirl assembly includes a swirl sleeve and a swirl plate. The swirl sleeve is fixed to the front end of the expanded pipe portion, and a swirl plate is provided on the outer circumferential surface of the swirl sleeve. An angle is provided between the plate surface of the swirl plate and the axis of the swirl sleeve.

4. The hot dirty coal gas and natural gas dual-purpose burner according to claim 1 is characterized in that: The inner end of the air shell is fixedly connected with a cone tube portion, the inner end of the cone tube portion is fixedly connected with a positioning sleeve, and the outer circumferential surface of the positioning sleeve is fixedly connected with a mounting plate.

5. The hot dirty coal gas and natural gas dual-purpose burner according to claim 1 is characterized in that: The outer end of the air housing is fixedly connected with a first flange, and the hot and dirty gas housing is fixedly connected with a second flange connected with the first flange.

6. The hot dirty coal gas and natural gas dual-purpose burner according to claim 1 is characterized in that: The sealing assembly includes a fixed sleeve, a movable sleeve, a third flange, a fourth flange and a sealing ring. The fixed sleeve is fixedly connected to the center hole of the sealing plate, the outer end of the fixed sleeve is fixedly connected to the third flange, the inner end of the axial hole of the fixed sleeve is provided with an inner flange structure, the movable sleeve is inserted into the fixed sleeve, a sealing ring is installed between the inner end of the movable sleeve and the fixed sleeve, and the outer end of the movable sleeve is fixedly connected to the fourth flange.

7. The hot dirty coal gas and natural gas dual-purpose burner according to claim 1 is characterized in that: The hot dirty gas shell is provided with a radial tar recovery pipe, and the tar recovery pipe and the hot dirty gas inlet pipe are arranged symmetrically.

8. The hot dirty coal gas and natural gas dual-purpose burner according to claim 1 is characterized in that: The natural gas nozzle of the natural gas core pipe is located in the expanded pipe portion of the hot dirty gas shell.

9. The hot dirty coal gas and natural gas dual-purpose burner according to claim 1 is characterized in that: When hot dirty gas is used alone, the natural gas core pipe extends outward, and the natural gas nozzle of the natural gas core pipe is located on the inner side of the sealing plate.

10. The hot dirty coal gas and natural gas dual-purpose burner according to claim 1, characterized in that: The air inlet pipe corresponds to the contracted pipe portion of the hot dirty gas shell.