Anti-backfire air mixer and two-section furnace

By designing the sealing plate, ring plate and liner in the anti-temperature air mixer, forming a comb-tooth sealing structure and closing the ring cavity, the problem of burning through and backfire at the bottom of the anti-temperature air mixer is solved, and the problem of burning through and backfire at the bottom of the anti-temperature air mixer is achieved. Reduce combustion and extend the service life.

CN119468212APending Publication Date: 2025-02-18CHONGQING JIANFENG CHEM
View PDF 0 Cites 0 Cited by

Patent Information

Application Number
CN202411551045.8
Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
Filing Date
2024-11-01
Publication Date
2025-02-18

AI Technical Summary

Technical Problem

During the use of the second-stage furnace, the bottom of the anti-tempered air mixer is easily burned through, causing the combustion flame to move upward, causing burning and deformation of the anti-tempered air mixer, and there is a risk of air pipeline fire.

Method used

An anti-temperature air mixer is designed, including a mixer body, a sealing plate, a ring plate and a liner. The sealing plate is welded to the outer cylinder and the inner liner to form a refractory lining accommodation cavity; the ring plate is arranged below the sealing plate along the extension direction of the mixer body to form a comb-tooth sealing structure; the liner seals the anti-temperature air mixer and the two annular cavity between section furnaces.

Benefits of technology

Through the design of sealing plates, ring plates and liners, the airflow is hindered, the possibility of combustion in the bottom area of ​​the mixer is slowed down, the risk of backfire occurs, and the equipment service life is extended.

✦ Generated by Eureka AI based on patent content.

Smart Images

  • Figure CN119468212A_ABST
    Figure CN119468212A_ABST
Patent Text Reader

Abstract

The invention provides an anti-backfire air mixer and a two-stage furnace, and solves the technical problem that the bottom of the anti-backfire air mixer is easy to burn through in the use process of the current two-stage furnace. Comprising a mixer body, the mixer body comprises a lining cylinder and an outer cylinder body annularly arranged on the outer side of the lining cylinder, and the top of the lining cylinder is connected with the top of the outer cylinder body; the sealing plate is fixedly connected to the outer cylinder body and the lining cylinder and is close to the bottom of the outer cylinder body and the bottom of the lining cylinder, and the sealing plate, the outer cylinder body and the lining cylinder define a containing cavity used for containing the fireproof lining; and the annular plate is arranged below the sealing plate in the extending direction of the body and connected to the lining cylinder, and the second-section furnace is provided with a baffle located below the annular plate. The sealing plate, the annular plate and the baffle are arranged to form a comb tooth structure to prevent airflow from moving upwards, so that the possibility of combustion in the bottom area of the mixer is reduced, and tempering is reduced.
Need to check novelty before this filing date? Find Prior Art

Description

Technical Field

[0001] The invention relates to the technical field of anti-flashback air mixers, and in particular to an anti-flashback air mixer and a two-stage furnace. Background Art

[0002] Since the start-up of the anti-flashback air mixer of the second-stage furnace, there is an annular cavity between the furnace body and the anti-flashback air mixer, and the flame will rise with the annular cavity. Therefore, every time it is inspected, maintained and dismantled, it is found that the cylinder in the bottom 200mm area is burned through, and the refractory lining holes fall off. The combustion flame is prone to move upward during operation, causing the anti-flashback air mixer to burn and deform, and there is a risk of flashback in the air pipeline. Summary of the invention

[0003] The purpose of the present invention is to provide an anti-flashback air mixer and a two-stage furnace, so as to solve the technical problem that the bottom of the anti-flashback air mixer is easily burned through during the use of the current two-stage furnace.

[0004] The present invention is achieved through the following technical solutions:

[0005] A first aspect of the present invention provides an anti-flashback air mixer, comprising a mixer body, a sealing plate and a ring plate;

[0006] The mixer body comprises an inner liner and an outer cylinder arranged around the outer side of the inner liner, wherein the inner liner is connected to the top of the outer cylinder;

[0007] The sealing plate is fixedly connected to the outer cylinder and the inner liner and is close to the bottom of the outer cylinder and the inner liner. The sealing plate, the outer cylinder and the inner liner together form a receiving chamber for receiving the refractory lining.

[0008] The ring plate is arranged below the sealing plate along the extension direction of the main body and is connected to the inner liner.

[0009] In some embodiments, the ring width of the ring plate is not greater than the ring width of the sealing plate.

[0010] In some embodiments, the ring plate has multiple layers, which are spaced apart along the extension direction of the mixer body.

[0011] A second aspect of the present invention provides a two-stage furnace, comprising the anti-flashback air mixer and a furnace body;

[0012] The anti-backfire air mixer is provided with a first clamping portion;

[0013] The furnace body is provided with a first clamping groove for installing the anti-flashback air mixer. The furnace body includes an air inlet pipe and a process gas inlet pipe. The air inlet pipe is arranged above the anti-flashback air mixer along the extension direction of the furnace body, and the process gas inlet pipe is arranged below the anti-flashback air mixer along the extension direction of the furnace body.

[0014] In some embodiments, a gasket is provided between the anti-flashback air mixer and the furnace body to seal the annular cavity between the anti-flashback air mixer and the furnace body.

[0015] In some embodiments, the gasket has multiple layers, which are sequentially arranged along the extension direction of the mixer body.

[0016] In some embodiments, the liner is a zirconium-containing ceramic fiber liner.

[0017] In some embodiments, a baffle is further included, the second-stage furnace includes an inner lining plate, the baffle is connected to the inner lining plate, and the baffle is arranged below the ring plate along the extension direction of the mixer body.

[0018] In some embodiments, the baffle ring width is not greater than the sealing plate ring width.

[0019] The technical solution of the present invention has at least the following advantages and beneficial effects:

[0020] (1) The present invention is provided with a sealing plate, which isolates the anti-flashback air mixer from the second-stage furnace. Then, through the baffle plate and partition plate arranged below, during operation, air comes down from the top of the anti-flashback air mixer, and process gas enters from the bottom side of the anti-flashback air mixer. An air vortex will be formed at the bottom corner of the anti-flashback air mixer, and a part of the hot air flow will go upward and enter the annular cavity between the anti-flashback air mixer and the second-stage furnace. Since there is air in the annular cavity, combustion is likely to occur. Therefore, in the present invention, a sealing plate, annular plate and baffle plate are arranged to hinder the upward movement of the air flow, thereby reducing the possibility of combustion in the bottom area of ​​the mixer and reducing the occurrence of flashback.

[0021] (2) The present invention adds a gasket at the connecting corner between the second-stage furnace and the anti-flashback air mixer to prevent air from entering the annular cavity downward, thereby reducing the possibility of combustion in the bottom area of ​​the mixer and reducing the occurrence of flashback.

[0022] (2) The present invention has reasonable design, simple structure and good practicality. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings required for use in the embodiments are briefly introduced below. It should be understood that the following drawings only show certain embodiments of the present invention and therefore should not be regarded as limiting the scope. For ordinary technicians in this field, other related drawings can be obtained based on these drawings without creative work.

[0024] Figure 1 A schematic structural diagram of an anti-backfire air mixer provided in an embodiment of the present invention;

[0025] Figure 2 A schematic diagram of the overall structure of a two-stage furnace provided in an embodiment of the present invention;

[0026] Figure 3 A schematic diagram of the structure of the connection part between the anti-flashback air mixer and the furnace body provided in an embodiment of the present invention;

[0027] icon:

[0028] 100. Mixer body; 110. Inner lining cylinder; 120. Outer cylinder;

[0029] 200, seal the board;

[0030] 300, ring plate;

[0031] 400, furnace body; 410, baffle; 420, air inlet pipe; 430, process gas inlet pipe; 440, lining plate;

[0032] 500. Pad. DETAILED DESCRIPTION

[0033] In order to make the purpose, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are part of the embodiments of the present invention, not all of the embodiments. Generally, the components of the embodiments of the present invention described and shown in the drawings here can be arranged and designed in various different configurations.

[0034] Example

[0035] A first aspect of the present invention provides an anti-flashback air mixer to prevent the bottom of the anti-flashback air mixer from burning.

[0036] See also Figure 1 , the anti-backfire air mixer provided in the embodiment of the present invention comprises a mixer body 100, a sealing plate 200 and a ring plate 300;

[0037] The mixer body 100 includes an inner liner 110 and an outer cylinder 120 arranged around the outer side of the inner liner 110, and the inner liner 110 and the outer cylinder 120 are connected at the top;

[0038] The sealing plate 200 is fixedly connected to the outer cylinder 120 and the inner liner 110 and is close to the bottom of the outer cylinder 120 and the inner liner 110. The sealing plate 200, the outer cylinder 120 and the inner liner 110 are enclosed together to form a receiving chamber for receiving the refractory lining. In some embodiments, the sealing plate 200 is welded to the outer cylinder 120 and the inner liner 110. In some embodiments, the sealing plate 200 is sealed and welded to the outer cylinder 120 and the inner liner 110.

[0039] The ring plate 300 is disposed below the sealing plate 200 along the extension direction of the main body and is connected to the inner liner 110 . In some embodiments, the ring plate 300 is an annular structure, and its inner wall is connected to the inner liner 110 .

[0040] In some embodiments, the ring width of the ring plate 300 is not greater than the ring width of the sealing plate 200, so that it is combined with the sealing plate 200 to form a comb-tooth sealing structure, which produces a throttling effect on the gas in the equipment through the comb-tooth gap and acts as a seal, preventing the flame in the second-stage furnace combustion chamber from moving upward, thereby slowing down the combustion of the annular air on the bottom end of the mixer and avoiding the occurrence of backfire.

[0041] In some embodiments, the ring plate 300 has multiple layers, which are spaced apart along the extending direction of the mixer body 100 .

[0042] A second embodiment of the present invention provides a two-stage furnace to prevent the bottom of the anti-flashback air mixer from burning.

[0043] See also Figure 2 as well as Figure 3 , the anti-flashback air mixer provided in the embodiment of the present invention comprises an anti-flashback air mixer and a furnace body 400;

[0044] The anti-backfire air mixer is provided with a first clamping portion;

[0045] The furnace body 400 is provided with a first clamping groove for installing an anti-flashback air mixer. The furnace body 400 includes an air inlet pipe 420 and a process gas inlet pipe 430. The air inlet pipe 420 is arranged above the anti-flashback air mixer along the extension direction of the furnace body 400, and the process gas inlet pipe 430 is arranged below the anti-flashback air mixer along the extension direction of the furnace body 400. In some embodiments, the anti-flashback air mixer is T-shaped along its axial cross-section. The furnace body 400 is provided with a first clamping groove to clamp the anti-flashback air mixer. The furnace body 400 includes an air pipeline arranged above the anti-flashback air mixer to introduce air / steam. The furnace body 400 includes a gas main arranged below the anti-flashback air mixer to introduce process gas. In some embodiments, a combustion chamber and a catalyst chamber are arranged in sequence below the anti-flashback air mixer along the axial direction of the furnace body 400. In some embodiments, the combustion chamber is provided with a gas main.

[0046] In some embodiments, the mixer body 100 is made of high temperature alloy Incoloy 800HT, and the bottom 400 mm section of the outer cylinder 120 of the mixer body 100 is thermally sprayed with zirconium.

[0047] In some embodiments, the mixer body 100 is made of inconel 602CA.

[0048] In some embodiments, a gasket 500 is provided between the anti-flashback air mixer and the furnace body 400 to close the annular cavity between the anti-flashback air mixer and the furnace body 400, which can hinder the top air from entering the annular cavity to prevent the entry of combustible materials. In some embodiments, the anti-flashback air mixer is T-shaped along its axial cross-section and is connected to the furnace body 400 through its corner. A gasket 500 is provided at the corner to close the upper end of the annular cavity between the anti-flashback air mixer and the furnace body 400 to prevent air from flowing into the annular cavity.

[0049] In some embodiments, the gasket 500 is provided with multiple layers, which are sequentially arranged along the extension direction of the mixer body 100 .

[0050] In some embodiments, the liner 500 is a zirconium-containing ceramic fiber liner 500 to ensure that the internal high temperature of the device does not burn the liner 500 .

[0051] In some embodiments, a baffle 410 is also included, and the second-stage furnace includes an inner lining plate 440. The baffle 410 is connected to the inner lining plate 440. The baffle 410 is arranged below the ring plate 300 along the extension direction of the mixer body 100. In some embodiments, the inner lining plate 440 is arranged on the outside of the anti-flashback air mixer to form an annular cavity with the anti-flashback air mixer. The baffle 410 has the same structure as the ring plate 300 and is connected to the inner lining plate 440 of the second-stage furnace.

[0052] In some embodiments, the ring width of the baffle 410 is not greater than the ring width of the sealing plate 200, so as to form a comb-tooth sealing structure in combination with the sealing plate 200 and the ring plate 300 above. The comb-tooth gap produces a throttling effect on the gas in the equipment and acts as a seal, preventing the flame in the second-stage furnace combustion chamber from moving upward, thereby slowing down the combustion of the annular air on the bottom end of the mixer and avoiding the occurrence of backfire.

[0053] In some embodiments, the ring plate 300 is spaced apart from the liner plate 440 , and the baffle plate 410 is spaced apart from the liner cylinder 110 .

[0054] The anti-flashback air mixer and the flashback process of the second stage furnace of the present invention are described in detail below:

[0055] The anti-flashback air mixer and the second-stage furnace of the present invention are provided with a sealing plate 200 and a ring plate 300 in sequence at the bottom of the anti-flashback air mixer, and a baffle 410 is connected to the inner lining plate 440 of the furnace body 400 of the second-stage furnace below the ring plate 300. The sealing plate 200, the ring plate 300 and the baffle 410 are arranged in sequence to form a comb tooth structure, so as to produce a throttling effect on the gas in the equipment through the comb tooth gap at the lower end of the annular cavity of the second-stage furnace and the anti-flashback air mixer, thereby playing a sealing role, preventing the flame in the combustion chamber of the second-stage furnace from moving upward, thereby slowing down the combustion of the annular air to the bottom end of the mixer, and avoiding the occurrence of flashback. A gasket 500 is added at the connecting corner of the second-stage furnace and the anti-flashback air mixer to seal the upper end of the annular cavity of the second-stage furnace and the anti-flashback air mixer, hindering the air from entering the annular cavity downward, further slowing down the possibility of combustion in the bottom area of ​​the mixer, and reducing the occurrence of flashback.

[0056] The anti-flashback air mixer and the two-stage furnace of the embodiment of the present invention have at least the following advantages:

[0057] (1) The present invention is provided with a sealing plate, which isolates the anti-flashback air mixer from the second-stage furnace. Then, through the baffle plate and partition plate arranged below, during operation, air comes down from the top of the anti-flashback air mixer, and process gas enters from the bottom side of the anti-flashback air mixer. An air flow vortex will be formed at the bottom corner of the anti-flashback air mixer, and a part of the hot air flow will go upward, thereby entering the annular cavity between the anti-flashback air mixer and the second-stage furnace. Since there is air in the annular cavity, combustion is likely to occur. Therefore, in the present invention, a sealing plate, annular plate and baffle plate are arranged to hinder the upward movement of the air flow, thereby reducing the possibility of combustion in the bottom area of ​​the mixer, reducing the occurrence of flashback, slowing down the process of the combustion flame moving upward in the running equipment, extending the service life, and preventing the risk of flashback of the air pipeline.

[0058] (2) The present invention adds a gasket at the connecting corner of the second stage furnace and the anti-flashback air mixer to seal the upper end of the annular cavity of the second stage furnace and the anti-flashback air mixer, thereby preventing air from entering the annular cavity downward, thereby reducing the possibility of combustion in the bottom area of ​​the mixer and reducing the occurrence of flashback.

[0059] (3) The present invention has reasonable design, simple structure and good practicality.

[0060] The above are only preferred embodiments of the present invention and are not intended to limit the present invention. For those skilled in the art, the present invention may have various modifications and variations. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention shall be included in the protection scope of the present invention.

Claims

1. A flashback air mixer, characterized in that: include: The mixer body comprises an inner liner and an outer cylinder arranged around the outer side of the inner liner, wherein the inner liner is connected to the top of the outer cylinder; A sealing plate, fixedly connected to the outer cylinder and the inner liner, and close to the bottom of the outer cylinder and the inner liner, the sealing plate, the outer cylinder and the inner liner together enclose a receiving chamber for receiving the refractory lining; A ring plate is arranged below the sealing plate along the extension direction of the main body and is connected to the inner liner.

2. The anti-flashback air mixer according to claim 1, characterized in that: The ring width of the ring plate is not greater than the ring width of the sealing plate.

3. The anti-flashback air mixer according to claim 1, characterized in that: The ring plate has multiple layers and is arranged at intervals along the extending direction of the mixer body.

4. A two-stage furnace, characterized in that: include: The anti-flashback air mixer as claimed in claims 1 to 3 is provided with a first clamping portion; The furnace body is provided with a first clamping groove for installing the anti-flashback air mixer. The furnace body includes an air inlet pipe and a process gas inlet pipe. The air inlet pipe is arranged above the anti-flashback air mixer along the extension direction of the furnace body, and the process gas inlet pipe is arranged below the anti-flashback air mixer along the extension direction of the furnace body.

5. The second stage furnace according to claim 4, characterized in that: A gasket is provided between the anti-flashback air mixer and the furnace body to seal the annular cavity between the anti-flashback air mixer and the furnace body.

6. The second stage furnace according to claim 5, characterized in that: The gasket is provided with multiple layers, which are arranged in sequence along the extending direction of the mixer body.

7. The second stage furnace according to claim 6, characterized in that: The liner is a zirconium-containing ceramic fiber liner.

8. The second stage furnace according to claim 5, characterized in that: It also includes a baffle, the second-stage furnace includes an inner lining plate, the baffle is connected to the inner lining plate, and the baffle is arranged below the ring plate along the extension direction of the mixer body.

9. The second stage furnace according to claim 8, characterized in that: The baffle ring width is not greater than the sealing plate ring width.