Spiral water-cooled wall dry bottom hopper flowing ash choking device

Abstract

The utility model belongs to the technical field of dry bottom hoppers, and particularly relates to a spiral water-cooled wall dry bottom hopper ash flow blocking device which comprises a spiral water-cooled wall assembly, and a plurality of flow blocking plates used for slowing down the ash flow speed are arranged on the ash facing face of the spiral water-cooled wall assembly. Along the ash flowing path, the distance between the spoilers is gradually reduced, in the operation process of the boiler, the water cooling wall of the dry bottom hopper is impacted and abraded by ash and coke blocks, so that the pipe wall is easily thinned and even fails, and especially for a spiral water cooling wall dry bottom hopper, the abrasion problem is more prominent due to the complex structure of the spiral water cooling wall dry bottom hopper, and the service life of the spiral water cooling wall dry bottom hopper is prolonged. Meanwhile, as the water cooling wall of the dry bottom hopper is large in size, the sliding distance of ash and coke blocks is long, the falling speed of the ash and the coke blocks is continuously increased under the influence of gravity, and the abrasion problem is more serious.

Description

Technical Field

[0001] This utility model belongs to the field of cold ash hopper technology, specifically relating to a spiral water-cooled wall cold ash hopper flow obstruction device. Background Technology

[0002] During boiler operation, the water-cooled walls of the cold ash hopper are easily thinned or even fail due to the impact and wear of ash, slag and coke. This is especially true for spiral water-cooled wall cold ash hoppers, where the wear problem is more prominent due to their complex structure. In addition, because the cold ash hopper water-cooled walls are large in volume, the ash, slag and coke slide a long distance, and the falling speed of the ash, slag and coke under the influence of gravity is constantly accelerating, which makes the wear problem even more serious. Utility Model Content

[0003] To address the problems mentioned in the background section, this invention provides a flow obstruction device for a spiral water-cooled wall ash hopper. A flow obstruction plate is installed in the spiral water-cooled wall assembly to slow down the sliding ash and coke, mitigating the problem of excessive speed leading to increased equipment wear due to the increased sliding distance.

[0004] To achieve the above objectives, this utility model provides the following technical solution: a spiral water-cooled wall ash hopper flow obstruction device, comprising a spiral water-cooled wall assembly, wherein a plurality of flow obstruction plates for slowing down the flow rate of ash slag are provided on the ash-facing surface of the spiral water-cooled wall assembly.

[0005] Along the ash flow path, the spacing between several flow-blocking plates gradually decreases.

[0006] As a preferred embodiment of the spiral water-cooled wall ash hopper flow obstruction device of this utility model, the inclination angle of the obstruction plate can change the original flow trajectory of the ash and slag, causing the ash and slag to move to the side away from the initial flow direction, and along the ash and slag flow path, the inclination angle of several obstruction plates gradually approaches the horizontal state.

[0007] As a preferred embodiment of the spiral water-cooled wall ash hopper flow obstruction device of this utility model, the flow obstruction plate has linearly arranged notches.

[0008] As a preferred embodiment of the spiral water-cooled wall ash hopper flow obstruction device of this utility model, the back ash surface of the obstruction plate is fixedly connected to the spiral water-cooled wall assembly through a connecting component.

[0009] As a preferred embodiment of the spiral water-cooled wall ash hopper flow obstruction device of this utility model, the connecting assembly includes a connecting plate, a threaded rod, a T-shaped block, and an arc-shaped plate. The two side wings of the connecting plate abut against the inner edges of the side wings of two adjacent heat dissipation fins. The inner side of the connecting plate is threadedly connected to the threaded rod. The smooth part of one end of the threaded rod extends to the inner side of the arc-shaped plate and is rotatably connected to it. The inner arc surface of the arc-shaped plate contacts the outer surface of the water-cooled pipe. The other end of the threaded rod is fitted with the connecting plate, and the connecting plate is fixedly connected to the back ash surface of the flow obstruction plate.

[0010] As a preferred embodiment of the spiral water-cooled wall ash hopper flow obstruction device of this utility model, a circular plate is fixedly connected to the outer side of the smooth end of the threaded rod, and the surface of the circular plate is in contact with the outer surface of the arc plate.

[0011] As a preferred embodiment of the spiral water-cooled wall ash hopper flow obstruction device of this utility model, the outer thread of the threaded rod is connected to two nuts that clamp and limit the connecting plate.

[0012] As a preferred embodiment of the spiral water-cooled wall ash hopper flow obstruction device of this utility model, the width of the T-shaped block and the arc plate is less than the minimum distance between two adjacent heat dissipation fins.

[0013] Compared with the prior art, the beneficial effects of this utility model are: by setting baffles in the spiral water-cooled wall assembly, the downward ash and coke blocks can be decelerated, alleviating the problem of excessive speed caused by the increased downward distance, which exacerbates equipment wear; at the same time, the layout of the baffles with gradually decreasing spacing along the ash flow path can further enhance the effect of reducing the overall downward speed of ash and coke blocks. Through the dual deceleration design, the wear of the spiral water-cooled wall assembly can be effectively controlled. Attached Figure Description

[0014] The accompanying drawings are provided to further illustrate the present invention and form part of the specification. They are used together with the embodiments of the present invention to explain the present invention, but do not constitute a limitation thereof. In the drawings:

[0015] Figure 1 This is a schematic diagram of the overall structure of this utility model;

[0016] Figure 2 This is a schematic diagram of the installation structure of the connecting components in this utility model;

[0017] Figure 3 This is a schematic diagram of the overall structure of the connecting component in this utility model;

[0018] In the picture:

[0019] 1. Spiral water-cooled wall assembly; 2. Baffle plate; 3. Connecting components;

[0020] 101. Water cooling pipes; 102. Heat dissipation fins; 103. Connecting strips;

[0021] 201. Gap;

[0022] 301. Connecting plate; 302. Threaded rod; 303. T-block; 304. Arc plate; 305. Round plate; 306. Nut. Detailed Implementation

[0023] 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.

[0024] like Figures 1-3 As shown:

[0025] A spiral water-cooled wall ash hopper flow obstruction device includes a spiral water-cooled wall assembly 1, and a plurality of flow obstruction plates 2 are provided on the ash-facing side of the spiral water-cooled wall assembly 1 to slow down the flow rate of ash and slag.

[0026] like Figure 1 As shown in the figure, assuming the ash falls from top to bottom along the ash flow path, the spacing between several baffles 2 gradually decreases.

[0027] In this embodiment, during boiler operation, the water-cooled wall of the cold ash hopper is easily thinned or even fails due to the impact and wear of ash and coke. This is especially true for the spiral water-cooled wall cold ash hopper, where the wear problem is more prominent due to its complex structure. At the same time, because the cold ash hopper water-cooled wall is large in volume, the ash and coke slide a long distance, and the falling speed of the ash and coke under the influence of gravity is constantly accelerating, which makes the wear problem even more serious.

[0028] The spiral water-cooled wall assembly 1 comprises a water-cooling pipe 101, heat dissipation fins 102, and connecting strips 103. The two sides of the water-cooling pipe 101 are fixedly connected to the heat dissipation fins 102 via the connecting strips 103, making the water-cooling pipe 101, heat dissipation fins 102, and connecting strips 103 form a single unit. Part of the spiral water-cooled wall assembly 1 is a frustum shape composed of several identical faces. The water-cooling pipe 101, heat dissipation fins 102, and connecting strips 103 on each face of the spiral water-cooled wall assembly 1 are inclined, and the water-cooling pipe 101, heat dissipation fins 102, and connecting strips 103 between adjacent water-cooled wall faces are connected, forming an overall spiral shape. Some ash and coke blocks will have their downward path altered due to the inclined arrangement of the water-cooling pipe 101 and heat dissipation fins 102 as they slide down, causing some ash and coke blocks to... The coke blocks slide down the inclined water-cooling pipe 101 and heat dissipation fins 102. To alleviate the severe wear of the spiral water-cooled wall assembly 1 caused by the increasing speed of the descent as the distance increases, several baffles 2 are installed on the spiral water-cooled wall assembly 1. This can prevent the ash and coke blocks from being in a continuous acceleration phase, thereby reducing the wear of the spiral water-cooled wall assembly 1. The baffles 2 can only slow down the ash and coke blocks as a whole, reducing the falling speed when the ash and coke blocks hit the baffles 2. Therefore, as the falling distance of the ash and coke blocks increases, the falling speed of the ash and coke blocks will still increase, but the speed will be relatively slower. Along the ash flow path, the spacing between the baffles 2 gradually decreases, which can further reduce the overall descent speed of the ash and coke blocks.

[0029] In an optional embodiment, the tilt angle of the baffle plate 2 can change the original flow trajectory of the ash and slag, causing the ash and slag to move to the side away from the initial flow direction, and along the ash and slag flow path, the tilt angle of several baffle plates 2 gradually approaches the horizontal state.

[0030] In this embodiment, the spiral water-cooled wall assembly 1 is generally a frustum shape, larger at the top and smaller at the bottom, such as... Figure 1 As shown, the water-cooling pipe 101 and the heat dissipation fins 102 are tilted to the lower right. Ash and coke will move to the right along this tilting direction, which will cause a large amount of ash and coke to accumulate at the junction of the two spiral water-cooling walls and fall down, resulting in uneven distribution of ash and coke. The tilted baffle plate 2 can minimize the accumulation of ash and coke at the junction of the two spiral water-cooling walls. In the downward direction, as the distance between the baffle plates 2 becomes smaller, the tilt angle of the baffle plates 2 should gradually become more horizontal to avoid the ash and coke moving too far to the left.

[0031] In an optional embodiment, the baffle plate 2 has linearly arranged notches 201.

[0032] In this embodiment, the design of the notch 201 can prevent excessive ash and coke from continuously accumulating on the baffle plate 2, allowing some of the ash and coke to fall from the notch 201. However, when excessive ash and coke continuously accumulate on the baffle plate 2, the function of reducing the flow rate of ash and coke will decrease.

[0033] In an optional embodiment, the back side of the baffle plate 2 is fixedly connected to the spiral water-cooled wall assembly 1 via the connecting component 3.

[0034] In this embodiment, the connecting component 3 is installed on the back side of the flow baffle 2, which can prevent the connecting component 3 from affecting the flow baffle effect of the flow baffle 2.

[0035] In an optional embodiment, the connecting assembly 3 includes a connecting plate 301, a threaded rod 302, a T-shaped block 303, and an arc-shaped plate 304. The two side wing structures of the connecting plate 301 abut against the inner edges of the side wings of the two adjacent heat dissipation fins 102. The inner side of the connecting plate 301 is threadedly connected to the threaded rod 302. The smooth part of one end of the threaded rod 302 extends to the inner side of the arc-shaped plate 304 and is rotatably connected to it. The inner arc surface of the arc-shaped plate 304 contacts the outer surface of the water cooling pipe 101. The other end of the threaded rod 302 is fitted with the connecting plate 301. The connecting plate 301 is fixedly connected to the back surface of the baffle plate 2.

[0036] In this embodiment, the T-shaped block 303 and the arc-shaped plate 304 are placed in the gap between the water-cooling pipe 101 and the heat dissipation fins 102, so that the T-shaped block 303 abuts against the inner side of the heat dissipation fins 102 and the arc-shaped plate 304 contacts the outer surface of the water-cooling pipe 101. Then, the threaded rod 302 is rotated, which causes the arc-shaped plate 304 to move downward, thereby increasing the distance between the T-shaped block 303 and the arc-shaped plate 304, so that the T-shaped block 303 is in close contact with the heat dissipation fins 102 and the arc-shaped plate 304 is in close contact with the water-cooling pipe 101. Finally, the connecting component 3 and the spiral water-cooled wall assembly 1 are installed and fixed. Then, the connecting plate 301 is fixedly connected to the baffle plate 2, and the baffle plate 2 is finally installed.

[0037] like Figure 3 As shown, an internal hexagonal groove is provided on the inner side of the top end of the threaded rod 302 to facilitate the rotation of the threaded rod 302.

[0038] In an optional embodiment, a circular plate 305 is fixedly connected to the outer side of the smooth surface of one end of the threaded rod 302, and the surface of the circular plate 305 is in contact with the outer surface of the arc plate 304.

[0039] In this embodiment, the outer surfaces of the circular plate 305 and the arc plate 304 are in contact, which allows the threaded rod 302 to be rotatably connected to the arc plate 304, while also providing better compressive support when the threaded rod 302 presses against the arc plate 304.

[0040] In an optional embodiment, the outer threaded rod 302 is connected to two nuts 306 that clamp and limit the connection plate 301.

[0041] In this embodiment, the distance between the baffle plate 2 and the spiral water-cooled wall assembly 1 needs to be adjusted. The distance between the baffle plate 2 and the spiral water-cooled wall assembly 1 can be adjusted by adjusting the position of the two nuts 306.

[0042] In an optional embodiment, the width of the T-shaped block 303 and the arc-shaped plate 304 is less than the minimum spacing between two adjacent heat dissipation fins 102.

[0043] In this embodiment, in order to facilitate the installation of the connecting component 3, the width of the T-shaped block 303 and the arc plate 304 is set to be less than the minimum distance between two adjacent heat dissipation fins 102. After the T-shaped block 303 and the arc plate 304 are inserted laterally through the gap between the two heat dissipation fins 102, the installation can be completed by rotating 90 degrees.

[0044] Finally, it should be noted that the above description is merely a preferred embodiment of this utility model and is not intended to limit the utility model. Although the utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this utility model should be included within the protection scope of this utility model.

Claims

1. A spiral water-cooled wall ash hopper flow obstruction device, comprising a spiral water-cooled wall assembly (1), characterized in that: The spiral water-cooled wall assembly (1) has several baffles (2) on the ash-facing side to slow down the flow rate of ash and slag. Along the ash flow path, the spacing between several flow-blocking plates (2) gradually decreases.

2. The spiral water-cooled wall ash hopper flow obstruction device according to claim 1, characterized in that: The tilt angle of the baffle plate (2) can change the original flow trajectory of the ash and cause the ash to move to the side away from the initial flow direction. Along the flow path of the ash, the tilt angle of several baffle plates (2) gradually approaches the horizontal state.

3. The spiral water-cooled wall ash hopper flow obstruction device according to claim 1 or 2, characterized in that: The baffle plate (2) has linearly arranged notches (201).

4. The spiral water-cooled wall ash hopper flow obstruction device according to claim 3, characterized in that: The back side of the baffle plate (2) is fixedly connected to the spiral water-cooled wall assembly (1) via the connecting component (3).

5. The spiral water-cooled wall ash hopper flow obstruction device according to claim 4, characterized in that: The connecting assembly (3) includes a connecting plate (301), a threaded rod (302), a T-shaped block (303), and an arc plate (304). The two side wings of the connecting plate (301) abut against the inner edges of the side wings of the two adjacent heat dissipation fins (102). The inner side of the connecting plate (301) is threadedly connected to the threaded rod (302). The smooth part of one end of the threaded rod (302) extends to the inner side of the arc plate (304) and is rotatably connected to it. The inner arc surface of the arc plate (304) contacts the outer surface of the water cooling pipe (101). The other end of the threaded rod (302) is fitted with the connecting plate (301). The connecting plate (301) is fixedly connected to the back gray surface of the baffle plate (2).

6. The spiral water-cooled wall ash hopper flow obstruction device according to claim 5, characterized in that: A circular plate (305) is fixedly connected to the outer side of the smooth surface of one end of the threaded rod (302), and the surface of the circular plate (305) is in contact with the outer surface of the arc plate (304).

7. The spiral water-cooled wall ash hopper flow obstruction device according to claim 5 or 6, characterized in that: The threaded rod (302) has two nuts (306) on its outer threaded connection that clamp and limit the connecting plate (301).

8. The spiral water-cooled wall ash hopper flow obstruction device according to claim 5, characterized in that: The width of the T-shaped block (303) and the arc plate (304) is less than the minimum spacing between two adjacent heat dissipation fins (102).

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