A wind-facing wall structure in a primary dust collector

Abstract

The present application relates to dust removal technical field, especially to a kind of windward wall structure in primary dust collector, windward wall is located in the air outlet end of primary dust collector, the side above ash bucket;The side wall surface of windward wall towards air inlet airflow, i.e. windward wall surface is provided with concave-convex structure.Windward wall top is provided with small partition, and the top end of small partition extends to air inlet airflow end, and the width of the top end of small partition is less than the width of the bottom end, forming wolf tooth structure.The present application is separated efficiently by the airflow colliding with windward wall surface and the dust carried by it through specially designed windward wall, while the airflow speed at windward wall surface can be reduced, to avoid that high-speed airflow carries a large amount of dust to leave primary dust collector, so as to achieve the goal of reducing the entrainment effect of airflow and improving dust removal efficiency.

Description

Technical Field

[0001] This invention relates to the field of dust removal technology, and in particular to a windward wall structure in a primary dust collector. Background Technology

[0002] In a dry quenching system, the main function of the primary dust collector can be summarized as: efficiently separating and capturing coarse coke particles in the circulating gas to protect downstream equipment and ensure stable system operation.

[0003] Protecting the boiler is the most critical function of the primary dust collector. The high-temperature circulating gas discharged from the dry quenching furnace carries a large amount of high-speed coke dust particles. If these particles are not separated and removed, they will severely scour and abrade the boiler tubes (especially the secondary superheater pipes), potentially leading to tube ruptures and leaks, forcing the system to shut down. After passing through the primary dust collector, the coke dust content in the circulating gas can be reduced to 1 g / m³. 3 The following measures are taken to effectively ensure the safe operation of the boiler.

[0004] Primary dust collectors typically operate on the principles of gravity settling or inertial dust collection. They alter the direction and velocity of the airflow by using internal baffles (such as gravity walls, inclined walls, and vertical walls). Larger coke particles, due to their own weight, cannot quickly change direction with the airflow and thus separate from it, settling into the ash hopper at the bottom of the primary dust collector. This process creates favorable conditions for subsequent fine dust removal and heat recovery.

[0005] With the development of simulation technology, simulation of primary dust collectors has revealed that the centrifugal effect of airflow and the dust entrainment effect directly affect the dust removal efficiency of primary dust collectors. How to reduce the entrainment effect of airflow and improve the dust removal efficiency through reasonable optimization of the structure of primary dust collectors has become an important research direction. Summary of the Invention

[0006] This invention provides a windward wall structure in a primary dust collector. Through a specially designed windward wall, the airflow impacting the windward wall surface can be efficiently separated from the dust it carries. At the same time, it can reduce the airflow velocity at the windward wall surface, preventing the high-speed airflow from carrying a large amount of dust out of the primary dust collector, thereby achieving the goal of reducing the entrainment effect of the airflow and improving the dust removal efficiency.

[0007] To achieve the above objectives, the present invention employs the following technical solution: A windward wall structure in a primary dust collector is located at the air outlet of the primary dust collector, on one side above the ash hopper; the side of the windward wall facing the incoming airflow, i.e., the windward wall surface, has a concave-convex structure.

[0008] The windward wall has multiple rows and columns of teardrop-shaped grooves on its windward surface, with the teardrop-shaped grooves being wider at the top and narrower at the bottom; along the height of the windward wall, the teardrop-shaped grooves in the same column are arranged in a tree-like staggered pattern and connected to each other; the depth of the teardrop-shaped grooves is 20-500mm.

[0009] The windward wall has multiple rows and columns of hook-shaped protrusions on its windward side, with two adjacent rows of hook-shaped protrusions staggered in the horizontal direction; the end of the hook-shaped protrusion connected to the windward wall has a teardrop-shaped cross-section that is wider at the top and narrower at the bottom; the horizontal protrusion height of the hook-shaped protrusion is 20-500mm.

[0010] The windward wall has a concave wave wall or a convex wave wall. The vertical cross-section of the concave wave wall has a continuous sawtooth outer edge, and the groove depth in the concave wave wall is 20-500mm. The vertical cross-section of the convex wave wall has a discontinuous sawtooth outer edge, and the horizontal convex height in the convex wave wall is 20-500mm.

[0011] The top of the windward wall is equipped with a small partition wall, the top of which extends towards the airflow end. The width of the top of the small partition wall is smaller than the width of the bottom, forming a serrated structure.

[0012] The small partitions are several in number and are spaced apart along the width of the windward wall.

[0013] The back of the small partition wall is reinforced with ribs.

[0014] The upper part of the windward wall has an outward protruding structure, with a horizontal protrusion height of 20-500mm and a vertical length of 100-5000mm.

[0015] Compared with the prior art, the beneficial effects of the present invention are: The specially designed windward wall enables efficient separation of the airflow and dust it carries when it hits the windward wall surface. At the same time, it can reduce the airflow velocity at the windward wall surface, preventing the high-speed airflow from carrying a large amount of dust out of the primary dust collector, thereby achieving the goal of reducing the entrainment effect of the airflow and improving the dust removal efficiency. Attached Figure Description

[0016] Figure 1 This is a schematic diagram of the position of the windward wall in the primary dust collector according to the present invention. Figure 1 .

[0017] Figure 2 This is a schematic diagram of the position of the windward wall in the primary dust collector according to the present invention. Figure 2 .

[0018] Figure 3 This is a schematic diagram of the windward wall structure described in this invention. Figure 1 .

[0019] Figure 4 This is a schematic diagram of the windward wall structure described in this invention. Figure 2 .

[0020] Figure 5 This is a partial structural diagram of the windward wall described in this invention. Figure 1 .

[0021] Figure 6 This is a partial structural diagram of the windward wall described in this invention. Figure 2 .

[0022] Figure 7 This is a partial structural diagram of the windward wall described in this invention. Figure 3 .

[0023] In the diagram: 1- Primary dust collector; 2- Windward wall; 3- Teardrop-shaped groove; 4- Hook-shaped protrusion; 5- Groove; 6- Outward convex structure; 7- Small partition wall; 8- Reinforcing rib; 9- Concave wave wall; 10- Protruding wave wall. Detailed Implementation

[0024] The specific embodiments of the present invention will be further described below with reference to the accompanying drawings: like Figure 1 , Figure 2 As shown, the windward wall structure in the primary dust collector of the present invention is located at the air outlet end of the primary dust collector 1, on one side above the ash hopper; the windward wall 2 has a concave-convex structure on the side wall facing the incoming airflow.

[0025] like Figure 3 As shown, the windward wall 2 has multiple rows and columns of teardrop-shaped grooves 3 arranged on its windward surface. The teardrop-shaped grooves 3 are wider at the top and narrower at the bottom. Along the height of the windward wall 2, the teardrop-shaped grooves 3 in the same column are arranged in a tree-like staggered pattern and connected to each other. The depth of the teardrop-shaped grooves 3 is 20-500mm.

[0026] like Figure 4 As shown, the windward wall 2 has multiple rows and columns of hook-shaped protrusions 4 arranged on its windward surface, with two adjacent rows of hook-shaped protrusions 4 staggered in the horizontal direction; the end of the hook-shaped protrusion 4 connected to the windward wall has a teardrop-shaped cross-section that is wider at the top and narrower at the bottom; the horizontal protrusion height of the hook-shaped protrusion 4 is 20-500mm.

[0027] like Figure 6 , Figure 7 As shown, the windward wall 2 has a concave wave wall 9 or a convex wave wall 10. The vertical cross-section of the concave wave wall 9 has a continuous sawtooth outer edge, and the groove depth in the concave wave wall is 20-500mm. The vertical cross-section of the convex wave wall 10 has a discontinuous toothed outer edge, and the horizontal convex height in the convex wave wall is 20-500mm.

[0028] like Figures 5-7 As shown, a small partition wall 7 is provided on the top of the windward wall 2. The top of the small partition wall 7 extends towards the airflow end. The width of the top of the small partition wall 7 is smaller than the width of the bottom, forming a serrated structure.

[0029] There are several small partition walls 7, which are spaced apart along the width of the windward wall 2.

[0030] The back of the small partition wall 7 is provided with reinforcing ribs 8.

[0031] The upper part of the windward wall 2 has an outward protruding structure 6, the horizontal protrusion height of which is 20-500mm and the vertical length is 100-5000mm.

[0032] To more intuitively illustrate the present invention, the embodiments of the present invention will be further described in conjunction with the examples. The following examples are merely preferred embodiments of the present invention, but the scope of protection of the present invention is not limited thereto. Any technical solutions that can be obviously obtained by those skilled in the art within the scope of the technology disclosed in the present invention, including simple variations or equivalent substitutions, are all within the scope of protection of the present invention.

[0033]

Example 1

[0034] In this embodiment, two adjacent teardrop-shaped grooves 3 in the same column form a group, and the upper group of teardrop-shaped grooves and the lower group of teardrop-shaped grooves are arranged alternately. One side wall of the upper teardrop-shaped groove extends downward to serve as the side wall of the lower teardrop-shaped groove.

[0035] When the dust-laden airflow passes through the windward wall 2, it flows from bottom to top along the windward surface of the windward wall 2. The multiple rows and columns of water droplet-shaped grooves 3 on the windward wall surface form an effect similar to a Tesla valve, which makes the speed of the dust-laden airflow close to the windward wall surface approach zero. The dust carried in the airflow impacts the windward wall surface or settles down quickly due to the reduced airflow speed and falls into the ash hopper, thereby achieving a highly efficient dust removal effect.

[0036]

Example 2

[0037] When the dust-laden airflow passes through the windward wall 2, it flows from bottom to top along the windward surface of the windward wall 2. The hook-shaped protrusions 4 can reduce the airflow speed that impacts or adheres to the windward wall, causing the dust carried by the airflow to settle down and fall into the dust hopper, thereby achieving a highly efficient dust removal effect.

[0038]

Example 3

[0039] The convex structure 6 can change the path of the airflow, forcing the airflow and the dust carried by the airflow into the groove 5 on the windward wall, reducing the flow velocity of the airflow along the windward wall, thereby better capturing and settling the dust carried in the airflow.

[0040] In this embodiment, a small partition wall 7 is provided at the top of the windward wall 2. The top of the small partition wall 7 extends towards the airflow end, and the width of the top of the small partition wall 7 is smaller than the width of the bottom end, forming a serrated structure. Reinforcing ribs 8 are provided on the back of the small partition wall 7. The small partition wall 7 can penetrate deep into the airflow, disrupting the velocity gradient of the airflow at the bend of the windward wall 2, and forcibly increasing the probability of collision when dust entrained by the airflow collides with the small partition wall 7, thereby reducing the dust velocity and achieving the effect of dust capture.

[0041]

Example 4

[0042] In this embodiment, a small partition wall 7 is provided at the top of the windward wall 2. The top of the small partition wall 7 extends towards the airflow end, and the width of the top of the small partition wall 7 is smaller than the width of the bottom end, forming a serrated structure. Reinforcing ribs 8 are provided on the back of the small partition wall 7. The small partition wall 7 can penetrate deep into the airflow, disrupting the velocity gradient of the airflow at the bend of the windward wall 2, and forcibly increasing the probability of collision when dust entrained by the airflow collides with the small partition wall 7, thereby reducing the dust velocity and achieving the effect of dust capture.

[0043]

Example 4

[0044] A small partition wall 7 is installed at the top of the windward wall 2. The top of the small partition wall 7 extends towards the airflow, and the width of the top of the small partition wall 7 is smaller than the width of the bottom, forming a serrated structure. A reinforcing rib 8 is provided on the back of the small partition wall 7. The small partition wall 7 can penetrate deep into the airflow, disrupting the velocity gradient of the airflow at the bend of the windward wall 2, and forcibly increasing the probability of collision when the airflow carries dust and collides with the small partition wall, thereby reducing the dust velocity and achieving the effect of dust capture.

[0045] The above description is only a preferred embodiment of the present invention, but the scope of protection of the present invention is not limited thereto. Any equivalent substitutions or modifications made by those skilled in the art within the scope of the technology disclosed in the present invention, based on the technical solution and inventive concept of the present invention, should be covered within the scope of protection of the present invention.

Claims

1. A windward wall structure within a primary dust collector, located at the outlet end of the primary dust collector, above the ash hopper on one side; characterized in that, The side of the windward wall facing the incoming airflow, i.e., the windward wall surface, has a concave-convex structure, including multiple rows and columns of teardrop-shaped grooves and / or multiple rows and columns of hook-shaped protrusions on the windward wall surface, or the windward wall surface is a concave wave wall surface and / or a convex wave wall surface; wherein, the teardrop-shaped grooves, concave wave wall surface, and convex wave wall surface can all form an effect similar to a Tesla valve.

2. The windward wall structure in a primary dust collector according to claim 1, characterized in that, When the windward wall has multiple rows and columns of teardrop-shaped grooves, the teardrop-shaped grooves are wider at the top and narrower at the bottom; along the height of the windward wall, the teardrop-shaped grooves in the same column are arranged in a tree-like staggered pattern and connected to each other; the depth of the teardrop-shaped grooves is 20-500mm.

3. The windward wall structure in a primary dust collector according to claim 1, characterized in that, When the windward wall has multiple rows and columns of hook-shaped protrusions, two adjacent rows of hook-shaped protrusions are staggered in the horizontal direction; the end of the hook-shaped protrusion connected to the windward wall has a teardrop-shaped cross-section that is wider at the top and narrower at the bottom; the horizontal protrusion height of the hook-shaped protrusion is 20-500mm.

4. The windward wall structure in a primary dust collector according to claim 1, characterized in that, When the windward wall is a concave wave wall or a convex wave wall, the vertical cross-section of the concave wave wall has a continuous sawtooth outer edge, and the groove depth in the concave wave wall is 20-500mm; the vertical cross-section of the convex wave wall has an intermittent sawtooth outer edge, and the horizontal convex height in the convex wave wall is 20-500mm.

5. The windward wall structure in a primary dust collector according to claim 1, characterized in that, The top of the windward wall is equipped with a small partition wall, the top of which extends towards the airflow end. The width of the top of the small partition wall is smaller than the width of the bottom, forming a serrated structure.

6. The windward wall structure in a primary dust collector according to claim 5, characterized in that, The small partitions are several in number and are spaced apart along the width of the windward wall.

7. The windward wall structure in a primary dust collector according to claim 5, characterized in that, The back of the small partition wall is reinforced with ribs.

8. The windward wall structure in a primary dust collector according to claim 1, characterized in that, The upper part of the windward wall has an outward protruding structure, with a horizontal protrusion height of 20-500mm and a vertical length of 100-5000mm.

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