A six-sided double-cone plug for fluidized bed furnaces
By using a six-sided double-cone plug structure to block airflow short-circuiting, the problem of airflow short-circuiting in cyclone dust collectors is solved, thereby improving gas-solid separation efficiency and optimizing fluidization.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- HENAN ZHONGLAN MACHINERY MANUFACTURING CO LTD
- Filing Date
- 2025-06-19
- Publication Date
- 2026-05-26
AI Technical Summary
The existing cyclone dust collector in the fluidized bed furnace has a short-circuit problem, which leads to a decrease in gas-solid separation efficiency and affects production efficiency.
It adopts a six-sided double-cone plug structure, including an upper cone and a lower cone that are symmetrical. The dust discharge slope forms a dust discharge gap with the ash discharge pipe. The gap size is adjusted by using self-locking nuts and positioning nuts to prevent airflow short circuits and optimize the airflow channel.
It effectively prevents airflow short-circuiting, optimizes fluidized gas distribution, improves gas-solid separation efficiency, and adapts to different working conditions.
Smart Images
Figure CN224285395U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of fluidized bed furnace technology, and in particular to a six-sided double-cone plug for fluidized bed furnaces. Background Technology
[0002] In industrial production, fluidized bed furnaces are common equipment, and gas-solid separation and dust control within them are key issues. Currently, given the actual operating conditions inside fluidized bed furnaces, the flue gas contains a relatively high amount of dust. To achieve initial dust collection and material return, cyclone dust collectors are often used for gas-solid separation. The ash discharge pipe of the cyclone dust collector is directly inserted into the lower part of the fluidized bed, which can quickly return the dust to the fluidized bed, thus meeting the dust collection and material return requirements to a certain extent.
[0003] However, the existing gas-solid separation method has significant shortcomings. Because of the airflow within the fluidized bed, this can cause a short circuit in the airflow within the cyclone dust collector. This short circuit significantly reduces the original gas-solid separation efficiency of the cyclone dust collector, resulting in some dust particles not being effectively separated, thus affecting the normal operation and production efficiency of the entire fluidized bed system. Therefore, developing a structure that can solve the airflow short-circuit problem in cyclone dust collectors and improve gas-solid separation efficiency is particularly necessary. Utility Model Content
[0004] The main objective of this invention is to provide a six-sided double-cone plug for a fluidized bed furnace, which addresses the problems mentioned in the background section.
[0005] To achieve the above objectives, the technical solution adopted by this utility model is as follows:
[0006] A six-sided double-cone plug for a fluidized bed boiler includes a cyclone dust collector, whose ash discharge pipe is inserted into the lower part of the fluidized bed layer of the boiler. A plug fixing seat is fixed to the outer wall of the ash discharge pipe end. The plug fixing seat has mounting holes evenly distributed around its perimeter, into which vertical screws are inserted. A self-locking nut and a positioning nut are respectively installed on the upper and lower sides of the screws on the plug fixing seat. The lower end of the screw has an end cap, below which a six-sided double-cone plug is fixedly connected. The six-sided double-cone plug consists of an upper cone and a lower cone that are symmetrically arranged, with the tip of the upper cone positioned inside the ash discharge pipe. The upper cone has a dust discharge ramp on its side, and the lower cone has a wind-blocking ramp on its side. A dust discharge gap is left between the dust discharge ramp and the opening of the ash discharge pipe; the size of the dust discharge gap is adjusted by the self-locking nut and the positioning nut.
[0007] Furthermore, the plug fixing seat is a thin plate-shaped structure in the shape of an equilateral triangle and is set horizontally, with the overlapping surfaces of the upper and lower cones set horizontally.
[0008] Furthermore, both the dust extraction slope and the windbreak slope are isosceles triangles.
[0009] Furthermore, the plug fixing seat and the ash discharge pipe, as well as the screw end and the six-sided double-cone plug, are fixedly connected by welding.
[0010] Furthermore, there is one locating nut and two self-locking nuts, forming a double-nut self-locking structure.
[0011] This invention also includes other components that enable the six-sided double-cone plug for fluidized bed furnaces to function properly. These devices or components all employ conventional techniques in the art. Furthermore, devices and components not specified in this invention all employ conventional techniques in the art, such as the cyclone dust collector and screw compressor mentioned in this application. In specific implementation, appropriate equipment or component models can be selected according to the specific working scenario.
[0012] The working principle of this invention is as follows: When the fluidized bed furnace is running, the cyclone dust collector performs gas-solid separation, and its ash discharge pipe is inserted into the lower part of the fluidized bed for rapid material return. The tip of the upper cone of the six-sided double-cone plug is placed inside the ash discharge pipe, and the material is discharged in a controlled manner through the dust discharge gap formed by the dust discharge slope and the pipe opening. When the material in the ash discharge pipe accumulates to a set height, the fluidized material in the fluidized bed pushes the accumulated material to be automatically discharged from the dust discharge slope. At the same time, the upper cone effectively blocks the airflow from the fluidized bed from entering the ash discharge pipe, avoiding airflow short-circuiting. The wind-blocking slope of the lower cone guides and diverts the fluidized gas, maintaining normal fluidization while reducing airflow disturbance. By adjusting the matching position of the self-locking nut and the positioning nut, the dust discharge gap size can be precisely controlled to adapt to different working conditions. This double-cone structure, through the synergistic effect of the upper and lower cones, achieves optimized control of the airflow channel while ensuring the material return function.
[0013] Compared with the prior art, the present invention has the following beneficial effects:
[0014] 1. Prevent airflow short circuit: The upper cone effectively blocks the airflow of the boiling layer from entering the ash discharge pipe, preventing the gas-solid separation efficiency from decreasing due to airflow short circuit.
[0015] 2. Optimize fluidized gas distribution: Use the inclined surface of the lower cone to guide and divert the fluidized gas, maintain normal fluidization state and reduce airflow disturbance.
[0016] 3. Precise adjustment of dust discharge gap: By adjusting the position of the self-locking nut and the positioning nut, the size of the dust discharge gap can be precisely controlled to adapt to different working conditions. Attached Figure Description
[0017] Figure 1 This is a top view of the present invention.
[0018] Figure 2 For along Figure 1 A cross-sectional view along the AA direction.
[0019] Figure 3 For along Figure 1 Cross-sectional view along the BB direction.
[0020] Figure 4 For along Figure 1 View from C.
[0021] In the diagram: 1. Ash discharge pipe; 2. Plug fixing seat; 3. Screw; 31. Positioning nut; 32. Self-locking nut; 4. Six-sided double cone plug; 41. Upper cone; 42. Lower cone; 43. Dust discharge slope; 44. Windproof slope; 5. Dust discharge gap. Detailed Implementation
[0022] The present invention will now be described in further detail with reference to the accompanying drawings and specific embodiments.
[0023] Example:
[0024] like Figures 1-4 As shown, a six-sided double-cone plug for a fluidized bed furnace includes a cyclone dust collector, with the ash discharge pipe 1 of the cyclone dust collector inserted into the lower part of the fluidized bed layer of the fluidized bed furnace. A plug fixing seat 2 is fixed to the outer wall of the end of the ash discharge pipe 1. Mounting holes are evenly distributed around the plug fixing seat 2, and vertical screws 3 are inserted into the mounting holes. Self-locking nuts 32 and positioning nuts 31 are respectively installed on the upper and lower sides of the screws 3 of the plug fixing seat 2. The lower end of the screws 3 has an end cap, and a six-sided double-cone plug 4 is fixedly connected below the end cap. The six-sided double-cone plug 4 consists of an upper cone 41 and a lower cone 42 that are symmetrically arranged. The tip of the upper cone 41 is located in the ash discharge pipe 1. The upper cone 41 has a dust discharge slope 43 on its side, and the lower cone 42 has a wind-blocking slope 44 on its side. A dust discharge gap 5 is left between the dust discharge inclined surface 43 and the opening of the ash discharge pipe 1. The size of the dust discharge gap 5 is adjusted by the self-locking nut 32 and the positioning nut 31.
[0025] Specifically, the plug fixing seat 2 is a thin plate-shaped structure in the shape of an equilateral triangle and is horizontally arranged, with the overlapping surfaces of the upper cone 41 and the lower cone 42 also horizontally arranged. The dust discharge slope 43 and the windproof slope 44 are both isosceles triangles. There is one positioning nut 31. There are two self-locking nuts 32, forming a double-nut self-locking structure.
[0026] In addition, the plug fixing seat 2 and the ash discharge pipe 1, and the screw 3 end and the six-sided double cone plug 4 are all fixedly connected by welding.
[0027] The working principle of this six-sided double-cone plug for a fluidized bed furnace is as follows: When the fluidized bed furnace is running, the cyclone dust collector performs gas-solid separation, and its ash discharge pipe 1 is inserted into the lower part of the fluidized bed for rapid material return. The tip of the upper cone 41 of the six-sided double-cone plug 4 is placed inside the ash discharge pipe 1, and the material is discharged in a controlled manner through the dust discharge gap 5 formed by the dust discharge slope 43 and the pipe opening: When the material in the ash discharge pipe 1 accumulates to a set height, the fluidized material in the fluidized bed pushes the accumulated material to be automatically discharged from the dust discharge slope 43. At the same time, the upper cone 41 effectively blocks the airflow from the fluidized bed into the ash discharge pipe 1, avoiding airflow short-circuiting. The wind-blocking slope 44 of the lower cone 42 guides and diverts the fluidized gas, maintaining normal fluidization while reducing airflow disturbance. By adjusting the mating position of the self-locking nut 32 and the positioning nut 31, the size of the dust discharge gap 5 can be precisely controlled to adapt to different working conditions. This double-cone structure, through the synergistic effect of the upper and lower cone surfaces, achieves optimized control of the airflow channel while ensuring the material return function.
[0028] The above embodiments are merely descriptions of preferred embodiments of the present utility model and are not intended to limit the scope of the present utility model. Various modifications and improvements made to the technical solutions of the present utility model by those skilled in the art without departing from the spirit of the present utility model should fall within the protection scope of the present utility model.
Claims
1. A six-sided double-cone plug for a fluidized bed furnace, comprising a cyclone dust collector, wherein the ash discharge pipe (1) of the cyclone dust collector is inserted into the lower part of the fluidized bed layer of the fluidized bed furnace, characterized in that: A plug fixing seat (2) is fixed on the outer wall of the end of the ash discharge pipe (1). The plug fixing seat (2) has mounting holes evenly distributed around its perimeter. A vertical screw (3) is inserted into the mounting holes. A self-locking nut (32) and a positioning nut (31) are respectively installed on the screw (3) on the upper and lower sides of the plug fixing seat (2). The lower end of the screw (3) is provided with an end head. A six-sided double-cone plug (4) is fixedly connected below the end head. The six-sided double-cone plug (4) is symmetrically arranged from top to bottom. The device consists of an upper cone (41) and a lower cone (42), with the tip of the upper cone (41) located in the ash discharge pipe (1). The upper cone (41) has a dust discharge slope (43) on its side, and the lower cone (42) has a windproof slope (44) on its side. A dust discharge gap (5) is left between the dust discharge slope (43) and the opening of the ash discharge pipe (1), and the size of the dust discharge gap (5) is adjusted by the self-locking nut (32) and the positioning nut (31).
2. The six-sided double-cone plug for a fluidized bed furnace according to claim 1, characterized in that: The plug fixing seat (2) is a thin plate structure in the shape of an equilateral triangle and is set horizontally. The overlapping surfaces of the upper cone (41) and the lower cone (42) are set horizontally.
3. The six-sided double-cone plug for a fluidized bed furnace according to claim 1, characterized in that: Both the dust removal slope (43) and the windbreak slope (44) are isosceles triangles.
4. The six-sided double-cone plug for a fluidized bed furnace according to claim 1, characterized in that: The plug fixing seat (2) and the ash discharge pipe (1), and the screw (3) end and the six-sided double cone plug (4) are fixedly connected by welding.
5. The six-sided double-cone plug for a fluidized bed furnace according to claim 1, characterized in that: The number of positioning nuts (31) is 1; the number of self-locking nuts (32) is 2, forming a double-nut self-locking structure.