Guide plate structure for preheated air duct of steam reforming furnace

Abstract

The utility model relates to an air flow guiding technology in a steam reformer, in particular to a guide plate structure for a preheated air duct of the steam reformer, which comprises a plate body, and the thickness from the head of the plate body to the tail of the plate body is gradually reduced. The plate body is provided with a plurality of differential pressure holes communicated with the two side faces of the plate body, and the tail of the plate body is further connected with a plurality of tooth-shaped tail edges. Through the improvement of the plate body structure, the gradual change of the thickness and the fluctuating structure of the side surface of the plate body, a streamline structure fitting airflow flowing is formed, and the airflow resistance can be reduced in the actual working process, so that friction and noise are reduced; the pressure difference between the two side surfaces is improved through the pressure difference holes, flutter of the plate body is avoided, disturbance of the plate body to airflow is reduced, and energy consumption is reduced.

Description

Technical Field

[0001] The utility model relates to an airflow guiding technology in a steam reformer, in particular to a guide plate structure for a preheating air duct of a steam reformer. Background Art

[0002] In the design of large steam reformers, forced ventilation burners are usually used to enhance the mixing effect of fuel and combustion air and make the fuel burn completely under low excess air. In order to ensure reliable and stable combustion, it is usually necessary to use the waste heat of flue gas to preheat the combustion air. The preheated combustion air is introduced into the air distribution duct configured on the top of the furnace through the air duct. The distribution duct enters the burner through multi-stage diversion. Due to the structural size and external support limitations of the preheated air duct, it is difficult for the fluid in the duct to flow evenly in the duct. Generally, it is necessary to set a simple flat metal guide plate at the corner and other positions. The noise generated by this regular L-shaped guide plate forms aerodynamic coupling with the flowing fluid in the closed air duct. When the aerodynamic excitation characteristics are close to the natural frequency of the structure, the flutter phenomenon of the guide plate will cause greater noise and greater local pressure drop near the duct. Because the noise dissipates the energy of gas flow and increases the resistance of gas flow, the simple flat metal guide plate structure increases energy consumption to a certain extent.

[0003] It can be seen that the guiding effect of the existing guide plate structure on the gas flow still needs to be improved, and it should be optimized to improve the noise and energy consumption problems caused by it. Therefore, it is necessary to propose a more reasonable technical solution to solve the technical problems existing in the prior art. Utility Model Content

[0004] In order to overcome at least one of the defects mentioned above, the utility model proposes a guide plate structure for the preheating air duct of a steam converter. By guiding the surface structure of the guide plate and improving the pressure difference on the two side surfaces of the guide plate, the noise generated by the guide plate in the process of guiding the airflow is lower, and the energy consumption in the process of airflow transmission can be reduced.

[0005] In order to achieve the above-mentioned purpose, the guide plate structure disclosed in the utility model can adopt the following technical solutions:

[0006] A guide plate structure for a preheating air duct of a steam reformer comprises a plate body, the thickness of which gradually decreases from the head to the tail of the plate body, and the plate body is provided with a plurality of pressure difference holes connecting the two side surfaces thereof, and the tail of the plate body is also connected with a plurality of toothed tail edges.

[0007] The guide plate structure disclosed above is arranged in a steam reformer. When guiding the gas flow, the pressure difference on both sides of the guide plate is reduced by changing the size structure of the guide plate itself and the pressure difference hole, thereby reducing the flutter phenomenon of the guide plate and effectively reducing noise and energy consumption.

[0008] Furthermore, in the present invention, the structure of the board body is in accordance with the aerodynamic force, thereby reducing the noise and energy consumption caused by the friction with the air. The head of the board body first contacts the air and needs to break the airflow. Here, an optimization is made and one of the feasible options is proposed: the windward surface of the head of the board body is an arc surface. When such a solution is adopted, the windward surface can be an elliptical surface, or the upper and lower parts of the windward surface can be set asymmetrically, so as to meet the effect of breaking the air and guiding the airflow.

[0009] Furthermore, in order to better guide the airflow and make the side surface of the plate body fit the disturbance of the airflow, the structure of the plate body can be set in various forms. Here, optimization is made and one feasible option is proposed: one side surface of the plate body forms a curved undulating structure. When such a solution is adopted, the side surface of the plate body can be a variable radius undulating surface, and the undulating trend extends along the length direction of the plate body.

[0010] Furthermore, in the present invention, the surface structures on both sides of the plate body are different, and an optimization is made here and one of the feasible options is proposed: the other side surface of the plate body is a flat surface. When such a solution is adopted, considering the differences in air flow speed and flow direction on both sides of the guide plate, different surface structures are set, and pressure difference holes are also set. When the pressure difference on the two sides of the guide plate is large, the pressure on both sides can be balanced through the pressure difference holes.

[0011] Furthermore, in the present invention, the setting positions of the pressure difference holes can be reasonably distributed according to the airflow trend. Here, an optimization is made and one of the feasible options is proposed: the pressure difference holes are evenly spaced on the plate body. When such a solution is adopted, the apertures of the pressure difference holes can be set to be the same or different, and can be reasonably set according to the pressure distribution on the surface of the plate body. The aperture of the pressure difference hole can be appropriately increased at a position with a larger theoretical pressure difference, and the aperture of the pressure difference hole can be appropriately reduced at a position with a smaller theoretical pressure difference.

[0012] Furthermore, in the present invention, the structure of the trailing edge is not limited to a single one, and an optimization is made here and a feasible option is proposed: the trailing edge includes a plurality of triangular teeth. When such a solution is adopted, one side of the triangular teeth fits the plate body, and the relative angle of the side points to the length extension direction of the plate body.

[0013] Furthermore, the triangular tooth-shaped member can be constructed in a variety of forms, and an optimization is made here and one feasible option is proposed: the triangular tooth-shaped member is an equilateral triangle. When such a solution is adopted, the directions of adjacent triangular tooth-shaped members are the same, and the gaps between adjacent triangular tooth-shaped members are equal, which can make the airflow pressure difference on both sides of the plate body better balanced.

[0014] Furthermore, the arrangement structure of the trailing edge is optimized and one feasible option is proposed: the trailing edge is continuously arranged along the width direction of the plate body.

[0015] Furthermore, the trailing edge is formed integrally with the plate body.

[0016] Furthermore, the thickness of the trailing edge gradually decreases along the length extension direction of the plate body.

[0017] Compared with the prior art, some beneficial effects of the technical solution disclosed in the utility model include:

[0018] By improving the plate structure, through the gradual change of thickness and the undulating structure of the side surface of the plate, a streamlined structure that fits the airflow is formed, which can reduce the resistance of the airflow during actual work, thereby reducing friction and noise; the pressure difference between the two side surfaces is improved through the pressure difference holes to avoid the flutter of the plate, thereby reducing the disturbance of the plate to the airflow and reducing energy consumption. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] In order to more clearly illustrate the technical solutions of the embodiments of the utility model, the drawings required for use in the embodiments will be briefly introduced below. It should be understood that the following drawings only show some embodiments of the utility model 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 paying creative work.

[0020] Figure 1 It is a structural schematic diagram of the guide plate in the utility model.

[0021] 1. Plate body; 2. Windward side; 3. Undulating structure; 4. Pressure difference hole; 6. Trailing edge. DETAILED DESCRIPTION

[0022] The present invention will be further explained below in conjunction with the accompanying drawings and specific embodiments.

[0023] In view of the unreasonable setting of the guide plate structure in the prior art, which causes great noise and energy consumption, the following embodiments are optimized to solve the defects in the prior art.

[0024] Example

[0025] like Figure 1 As shown, this embodiment provides a guide plate structure for a preheating air duct of a steam reformer, including a plate body 1, the thickness of the plate body 1 gradually decreases from the head to the tail of the plate body 1, and the plate body 1 is provided with a plurality of pressure difference holes 4 connecting the two side surfaces thereof, and the tail of the plate body 1 is also connected with a plurality of toothed tail edges 6.

[0026] The guide plate structure disclosed in this embodiment is arranged in a steam reformer. When guiding the gas flow, the pressure difference on both sides of the guide plate is reduced by changing the size structure of the guide plate itself and the pressure difference hole 4, thereby reducing the flutter phenomenon of the guide plate and effectively reducing noise and energy consumption.

[0027] In this embodiment, the structure of the plate body 1 is in aerodynamically close contact, thereby reducing the noise and energy consumption caused by friction with the air. The head of the plate body 1 first contacts the air and needs to break the airflow. This embodiment is optimized and adopts one of the feasible options: the windward surface 2 of the head of the plate body 1 is an arc surface. When such a solution is adopted, the windward surface 2 can be an elliptical surface, or the upper and lower parts of the windward surface 2 can be asymmetrically arranged, so as to meet the effect of breaking the air and guiding the airflow.

[0028] In order to better guide the airflow and make the side surface of the plate body 1 fit the disturbance of the airflow, the structure of the plate body 1 can be set in various forms. This embodiment optimizes and adopts one of the feasible options: a side surface of the plate body 1 forms a curved undulating structure 3. When such a solution is adopted, the side surface of the plate body 1 can be a variable radius undulating surface, and the undulating trend extends along the length direction of the plate body 1.

[0029] In this embodiment, the surface structures on both sides of the plate body 1 are different. This embodiment is optimized and adopts one of the feasible options: the other side surface of the plate body 1 is a flat surface. When such a solution is adopted, considering the differences in air flow speed and flow direction on both sides of the guide plate, different surface structures are set, and pressure difference holes 4 are also set. When the pressure difference on the two sides of the guide plate is large, the pressure on both sides can be balanced through the pressure difference holes 4.

[0030] In this embodiment, the setting positions of the pressure difference holes 4 can be reasonably distributed according to the airflow trend. This embodiment is optimized and adopts one of the feasible options: the pressure difference holes 4 are evenly spaced on the plate body 1. When such a solution is adopted, the apertures of the pressure difference holes 4 can be set to be the same or different, and can be reasonably set according to the pressure distribution on the surface of the plate body 1. The aperture of the pressure difference hole 4 can be appropriately increased at a position where the theoretical pressure difference is large, and the aperture of the pressure difference hole 4 can be appropriately reduced at a position where the theoretical pressure difference is small.

[0031] In this embodiment, the structure of the trailing edge 6 is not limited to a single one, and this embodiment is optimized and adopts one of the feasible options: the trailing edge 6 includes a plurality of triangular tooth-shaped members. When such a solution is adopted, one side of the triangular tooth-shaped member fits the plate body 1, and the relative angle of the side points to the length extension direction of the plate body 1.

[0032] The triangular tooth-shaped member can be constructed in a variety of forms. This embodiment optimizes and adopts one of the feasible options: the triangular tooth-shaped member is an equilateral triangle. When such a solution is adopted, the directions of adjacent triangular tooth-shaped members are the same, and the gaps between adjacent triangular tooth-shaped members are equal, which can make the airflow pressure difference on the two sides of the plate body 1 better balanced.

[0033] Preferably, the arrangement structure of the trailing edge 6 is optimized and one of the feasible options is adopted: the trailing edge 6 is continuously arranged along the width direction of the plate body 1 .

[0034] In some feasible embodiments, the trailing edge 6 is formed integrally with the plate body 1 .

[0035] In some feasible embodiments, the thickness of the trailing edge 6 gradually decreases along the length extension direction of the plate body 1 .

[0036] The above are the implementation methods listed in this embodiment, but this embodiment is not limited to the above optional implementation methods. Those skilled in the art can arbitrarily combine the above methods to obtain other various implementation methods. Anyone can derive other various implementation methods under the inspiration of this embodiment. The above specific implementation methods should not be understood as limiting the protection scope of this embodiment. The protection scope of this embodiment should be based on the definition in the claims.

Claims

1. A guide plate structure for a preheated air duct of a steam reformer, characterized in that: The plate body (1) comprises a plate body (1), the thickness of which gradually decreases from the head of the plate body (1) to the tail of the plate body (1), and the plate body (1) is provided with a plurality of pressure difference holes (4) communicating with the two side surfaces thereof, and the tail of the plate body (1) is also connected with a plurality of toothed tail edges (6).

2. The guide plate structure for the preheated air duct of the steam reformer according to claim 1, characterized in that: The windward surface (2) of the head of the plate body (1) is an arc-shaped surface.

3. The guide plate structure for the preheated air duct of the steam reformer according to claim 1, characterized in that: A curved undulating structure (3) is formed on one side surface of the plate body (1).

4. The guide plate structure for the preheated air duct of the steam reformer according to claim 3, characterized in that: The other side surface of the plate body (1) is a flat surface.

5. The guide plate structure for the preheated air duct of the steam reformer according to claim 1, characterized in that: The differential pressure holes (4) are evenly spaced and distributed on the plate body (1).

6. The guide plate structure for the preheating air duct of the steam reformer according to claim 1, characterized in that: The trailing edge (6) comprises a plurality of triangular tooth-shaped parts.

7. The guide plate structure for the preheating air duct of the steam reformer according to claim 6, characterized in that: The triangular tooth-shaped member is an equilateral triangle.

8. The guide plate structure for the preheating air duct of the steam reformer according to claim 6 or 7, characterized in that: The trailing edge (6) is continuously arranged along the width direction of the plate body (1).

9. The guide plate structure for the preheating air duct of the steam reformer according to claim 6 or 7, characterized in that: The trailing edge (6) is integrally formed with the plate body (1).

10. The guide plate structure for the preheating air duct of the steam reformer according to claim 6 or 7, characterized in that: The thickness of the trailing edge (6) gradually decreases along the length extension direction of the plate body (1).

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