Automatic ash unloading device
By designing an automatic ash discharge device, the balance between the negative pressure of the ash discharge pipe and the gravity of the dust is utilized to achieve automatic ash discharge, solving the problem of clogging of the screw conveyor, ensuring the continuity of fluidized bed production and the effect of exhaust gas scrubbing, and reducing energy consumption and maintenance costs.
Patent Information
- Application Number
- CN202522063697.3
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-09-25
- Publication Date
- 2026-11-03
- Estimated Expiration
- 2035-09-25
AI Technical Summary
Monoammonium phosphate dust has a fine particle size and is hygroscopic, which can easily clog the screw conveyor, causing the cyclone separator's ash pipe to malfunction, affecting the continuity of fluidized bed production and the exhaust gas scrubbing indicators.
Design an automatic ash discharge device, including an ash discharge pipe, a baffle, a connecting component, and an ash receiving trolley. The bottom of the ash discharge pipe has an oblique ash discharge port. The baffle is movably connected to the ash discharge port through the connecting component. When the negative pressure and the weight of the dust are unbalanced, the baffle automatically discharges the dust to the ash receiving trolley, so as to realize the continuous recycling of dust.
By combining the obliquely cut ash discharge port with the baffle, the automatic ash discharge device avoids clogging of the screw conveyor, ensures production continuity, reduces energy consumption and maintenance costs, and improves the separation effect and exhaust gas washing index of the cyclone separator.
Smart Images
Figure CN224929950U_ABST
Abstract
Description
Technical Field
[0001] This application relates to chemical equipment technology, and more particularly to an automatic ash unloading device. Background Technology
[0002] In phosphate compound fertilizer enterprises, the drying of monoammonium phosphate (MAP) products relies on the heat of the amine neutralization reaction and fluidized bed heating. The fluidized bed adopts a closed structure. The gas phase from the top exhaust is separated by a cyclone separator and then enters the tail gas scrubbing process. Solid dust is discharged into a handcart for recycling through a screw conveyor in the lower ash pipe. The screw conveyor discharges material slowly by rotating, and the material layer formed above it can seal the space, ensuring the separation effect of the separator and the tail gas scrubbing performance. However, the fine particle size and hygroscopic nature of MAP dust easily clog the screw conveyor, leading to frequent screw conveyor malfunctions. This, in turn, renders the lower ash pipe of the cyclone separator unusable, affecting the continuity of fluidized bed production and the tail gas scrubbing performance. Utility Model Content
[0003] To address the aforementioned technical problems, this application provides an automatic dust removal device for achieving cyclic separation of dust.
[0004] The technical solution provided in this application is described below: This application provides an automatic ash unloading device, including: an ash discharge pipe, a baffle, a connecting assembly, and an ash receiving trolley; The bottom of the ash discharge pipe is provided with a slanted ash discharge port, and one end of the baffle is movably connected to the upper end of the slanted ash discharge port through the connecting assembly; The shape of the baffle is adapted to the shape of the obliquely cut ash discharge port, and the size of the baffle is larger than the size of the obliquely cut ash discharge port; The ash-receiving handcart is placed within a predetermined distance below the ash-receiving pipe, and the opening of the ash-receiving handcart corresponds to the bottom opening of the ash-receiving pipe. The baffle is used to accumulate dust when the oblique ash discharge port is closed, and to release the accumulated dust when the negative pressure of the ash discharge pipe is out of balance with the weight of the accumulated dust; the ash receiving trolley is used to collect the accumulated dust released by the baffle.
[0005] Optionally, the connecting assembly includes: a mounting plate, a nut, and a through rod; the mounting plate is a rectangular stainless steel plate, disposed at one end of the baffle, and a nut is welded to the mounting plate; two nuts are welded to the high end of the obliquely cut ash discharge port, the distance between the two nuts being the width of one nut, so that the nut on the mounting plate is placed between the two nuts; the through rod passes through the two nuts and the nut on the mounting plate, so that the connecting assembly and the baffle combine to form a hinge structure.
[0006] Optionally, the lower ash pipe is a vertical stainless steel cylindrical pipe with a nominal diameter of 250 mm; the baffle is a stainless steel circular plate with a thickness of 3 mm.
[0007] Optionally, the obliquely cut ash discharge port is a circular bevel with an angle of 30° between the bevel and the horizontal line, and the diameter of the stainless steel circular plate is 26 cm.
[0008] Optionally, the lower end of the obliquely cut ash discharge port is provided with an arc-shaped guide concave flange.
[0009] Optionally, the ash discharge pipe is a vertical stainless steel square pipe, the oblique ash discharge port is a square bevel with an angle of 20° to 40° between the bevel and the horizontal line, and the baffle is a 3 mm thick stainless steel square plate.
[0010] Optionally, a V-shaped guide flange is provided at the lower end of the obliquely cut ash discharge port.
[0011] Optionally, the surface of the baffle is provided with a raised texture.
[0012] As can be seen from the above technical solutions, this application has the following beneficial effects: This application provides an automatic ash discharge device, including an ash discharge pipe, a baffle, a connecting assembly, and a ash receiving trolley. The bottom of the ash discharge pipe has a slanted ash discharge port, and one end of the baffle is movably connected to the upper end of the slanted ash discharge port via the connecting assembly. The shape of the baffle matches the shape of the slanted ash discharge port, and the size of the baffle is larger than the size of the slanted ash discharge port. A ash receiving trolley is placed at a preset distance below the ash discharge pipe, and the opening of the ash receiving trolley corresponds to the bottom opening of the ash discharge pipe. The baffle is used to accumulate dust when the slanted ash discharge port is closed, and to release the accumulated dust when the negative pressure of the ash discharge pipe and the weight of the accumulated dust become unbalanced. The ash receiving trolley is used to collect the accumulated dust released by the baffle. The automatic ash unloading device of this application achieves automatic ash unloading by using the balance between the negative pressure of the ash discharge pipe and the gravity of the dust through the obliquely cut ash discharge port and the appropriate baffle structure. When the baffle is closed, dust can be accumulated to form a closed space, avoiding backflow of external gas phase to ensure the separation effect of the cyclone separator and the exhaust gas washing index, replacing the easily malfunctioning screw unloader. When the weight of the dust exceeds the negative pressure, the dust is automatically released to the ash collection trolley to achieve continuous dust recycling. This not only solves the problem of blockage of the unloading component and ensures the continuity of production, but also eliminates the need for electric drive, reducing energy consumption and failure maintenance costs, and effectively improves the operating defects of the original equipment. Attached Figure Description
[0013] Figure 1 A schematic diagram of an embodiment of the automatic ash unloading device provided in this application; Figure 2 This is a schematic diagram of another embodiment of the automatic ash unloading device provided in this application. Detailed Implementation
[0014] In this application, the terms "upper", "lower", "left", "right", "front", "rear", "top", "bottom", "inner", "outer", "middle", "vertical", "horizontal", "lateral", "longitudinal" and other terms indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only used to describe the relative positional relationship between the components or parts and do not specifically limit the specific installation orientation of each component or part.
[0015] Furthermore, in addition to indicating location or positional relationship, some of the aforementioned terms may also have other meanings. For example, the term "above" may also be used in some cases to indicate a certain dependency or connection relationship. Those skilled in the art can understand the specific meaning of these terms in this application based on the specific circumstances.
[0016] Furthermore, the terms "installation," "setup," "equipped with," "connection," and "linked" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral structure; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium, or an internal connection between two devices, components, or parts. Those skilled in the art can understand the specific meaning of these terms in this application based on the specific circumstances.
[0017] Furthermore, the structures, proportions, sizes, etc., drawn in the accompanying drawings of this application are only used to complement the content disclosed in the specification for those skilled in the art to understand and read, and are not intended to limit the conditions under which this application can be implemented. Therefore, they have no substantial technical significance. Any modification to the structure, change in the proportional relationship, or adjustment of the size, without affecting the effects and purposes that this application can produce, should still fall within the scope of the technical content disclosed in this application.
[0018] The technical solutions of this application will now be clearly and completely described with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this application, and not all embodiments. Based on the embodiments of this application, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this application.
[0019] See Figure 1 This application first provides an embodiment of an automatic ash unloading device, which includes: Ash pipe 01, baffle 02, connecting assembly 03 and ash receiving trolley; The bottom of the ash discharge pipe 01 is provided with a slanted ash discharge port. One end of the baffle 02 is movably connected to the high end of the slanted ash discharge port through the connecting component 03. The shape of the baffle 02 is adapted to the shape of the slanted ash discharge port, and the size of the baffle 02 is larger than the size of the slanted ash discharge port. A ash-collecting trolley is placed within a preset distance below the ash discharge pipe 01, and the opening of the ash-collecting trolley corresponds to the bottom opening position of the ash discharge pipe 01. The baffle 02 is used to accumulate dust when the slanted ash discharge port is closed, and to release the accumulated dust when the negative pressure of the ash discharge pipe 01 and the weight of the accumulated dust are out of balance. The ash-collecting trolley is used to collect the accumulated dust released by the baffle 02.
[0020] The components of this embodiment will be described below: Ash discharge pipe 01: Ash discharge pipe 01 is the main conveying component of the automatic ash unloading device. The bottom of ash discharge pipe 01 has a slanted ash discharge port, serving as a channel for dust unloading. The pipe is under negative pressure, which guides the solid dust separated by the fluidized bed cyclone separator to move downwards under gravity and accumulate inside the pipe. The slanted ash discharge port design provides the structural basis for the subsequent installation of baffle 02 and the automatic unloading of dust, ensuring that dust can be discharged through this opening under specific conditions.
[0021] Baffle 02: The shape of baffle 02 is adapted to the oblique-cut ash discharge port, and its size is larger than the ash discharge port, so that it can tightly cover the ash discharge port to achieve a closed state. One end of it is connected to the high end of the oblique-cut ash discharge port through the connecting component 03, and can move up and down within a certain range in the vertical direction. When closed, baffle 02 can block dust from falling, so that a dust layer of a certain height is formed in the ash discharge pipe 01, and the weight of the dust itself is used to balance the negative pressure in the pipe; when the weight of the dust exceeds the negative pressure, baffle 02 will automatically open, and the accumulated dust will be discharged into the ash receiving trolley.
[0022] Connecting component 03: Connecting component 03 is a key component connecting the baffle 02 and the oblique ash discharge port. Its function is to enable the baffle 02 to move around the connection point as an axis, thereby controlling the opening and closing of the oblique ash discharge port. Through the connection of this component, the baffle 02 can flexibly switch states under the action of dust gravity and the negative pressure of the ash discharge pipe 01, providing structural support for the automatic ash discharge function. This ensures that the baffle 02 can effectively close the ash discharge port to form a dust accumulation space, and can also smoothly open to complete the ash discharge when conditions are met.
[0023] Ash collection trolley: The ash collection trolley is placed at a predetermined distance below the ash discharge pipe 01, with its opening corresponding to the oblique ash discharge port at the bottom of the ash discharge pipe 01. It is specifically used to collect the accumulated dust discharged from the baffle 02. As the terminal component of dust recovery, it can receive the dust discharged from the ash discharge port, realizing the centralized collection and recycling of dust, ensuring the continuity of the entire ash discharge process and the convenience of dust recovery.
[0024] In this embodiment, the automatic ash unloading device achieves automatic ash unloading by using the balance between the negative pressure of the ash discharge pipe 01 and the gravity of the dust through the obliquely cut ash discharge port and the matching baffle 02 structure. When the baffle 02 is closed, dust can be accumulated to form a closed space, avoiding backflow of external gas phase to ensure the separation effect of the cyclone separator and the exhaust gas washing index, replacing the easily malfunctioning screw unloader. When the dust weight exceeds the negative pressure, the dust is automatically released to the ash collection trolley to achieve continuous dust recycling. This not only solves the problem of blockage of the unloading component and ensures production continuity, but also eliminates the need for electric drive, reducing energy consumption and failure maintenance costs, and effectively improving the operational defects of the original equipment.
[0025] In an optional embodiment, the connecting assembly 03 includes: a mounting plate, a nut, and a through rod; the mounting plate is a rectangular stainless steel plate, disposed at one end of the baffle 02, and a nut is welded to the mounting plate; two nuts are welded to the high end of the obliquely cut ash discharge port, the distance between the two nuts being the width of one nut, so that the nut on the mounting plate is placed between the two nuts; the through rod passes through the two nuts and the nut on the mounting plate, so that the connecting assembly 03 and the baffle 02 combine to form a hinge structure.
[0026] In this optional embodiment, the connecting assembly 03, through the cooperation of the mounting plate, nuts, and through rod, constructs a stable and flexible hinged connection structure. The rectangular stainless steel mounting plate serves as the connection medium between the baffle 02 and the lower ash pipe 01. The single nut welded to the mounting plate corresponds to the two nuts welded to the high end of the obliquely cut ash discharge port—the distance between the two nuts is precisely controlled to the width of a single nut, just enough to accommodate the nut on the mounting plate embedded in the middle. The through rod passes through the three nuts to form an axis, allowing the baffle 02 to rotate flexibly with the through rod as a fulcrum. Therefore, the diameter of the through rod is slightly smaller than the inner diameter of the three nuts to allow for rotation. This design ensures both the robustness of the connection and, through the hinged structure, provides the baffle 02 with sufficient freedom of movement, providing a reliable mechanical basis for its automatic opening and closing under the gravity of dust and the negative pressure of the lower ash pipe 01.
[0027] In an optional embodiment, the lower ash pipe 01 is a vertical stainless steel cylindrical pipe with a nominal diameter of 250 mm; the baffle 02 is a stainless steel circular plate with a thickness of 3 mm.
[0028] In an optional embodiment, the obliquely cut ash discharge port is a circular bevel with an angle of 30° between the bevel and the horizontal line, and the diameter of the stainless steel circular plate is 26 cm.
[0029] In an optional embodiment, the lower end of the obliquely cut ash discharge port is provided with an arc-shaped guide concave flange.
[0030] In the three optional embodiments described above, the ash discharge pipe 01 is a vertically installed stainless steel cylindrical pipe with a nominal diameter of 250 mm. This specification not only meets the ash discharge requirements of the fluidized bed cyclone separator but also provides suitable space for dust accumulation. The vertical structure ensures that the dust naturally falls under the influence of gravity. The matching baffle 02 is a 3 mm thick stainless steel circular plate with a diameter of 26 cm. It not only maintains the same material as the ash discharge pipe 01 to enhance durability, but the 3 mm thickness also ensures sufficient structural strength. The 26 cm diameter is slightly larger than the inner diameter of the ash discharge pipe 01, allowing it to tightly cover the obliquely cut ash discharge port and effectively prevent backflow of gas. The obliquely cut ash discharge port is designed as a circular inclined surface with an angle of 30° between the inclined side and the horizontal line. This angle is mechanically designed so that the gravitational component of the dust can just exceed the negative pressure adsorption threshold, thereby guiding the dust to slide smoothly during ash discharge while avoiding the dust slippage and loss of control caused by an inclination angle of more than 45°, which would prevent the formation of an accumulation state.
[0031] The lower end of the obliquely cut ash discharge port is equipped with an arc-shaped guide concave edge, which further optimizes the ash discharge process. That is, when the baffle 02 opens to release the accumulated dust, the arc-shaped structure can guide the dust along the trajectory of falling dust, reducing the adhesion and accumulation of dust on the edge of the ash discharge port, ensuring that the dust enters the ash receiving trolley below more smoothly, and also reducing the risk of ash discharge port blockage caused by dust residue. In conjunction with the specifications and angle design of the ash discharge pipe 01 and the baffle 02, it jointly improves the stability and efficiency of the automatic ash discharge device.
[0032] In an optional embodiment, the ash discharge pipe 01 is a vertical stainless steel square pipe, the oblique ash discharge port is a square bevel with an angle of 20° to 40° between the bevel and the horizontal line, and the baffle 02 is a stainless steel square plate with a thickness of 3 mm.
[0033] In an optional embodiment, the lower end of the obliquely cut ash discharge port is provided with a V-shaped guide flange.
[0034] In the two optional embodiments described above, the ash discharge pipe 01 is a vertically installed stainless steel square pipe, which makes the dust accumulation inside the pipe more uniform and reduces dust residue caused by local dead corners. The obliquely cut ash discharge port matched with the stainless steel square pipe is a square bevel, with the angle between the bevel and the horizontal line between 20° and 40°. This angle range takes into account both the stability of dust accumulation: if the angle is too small, the dust will easily slide off prematurely, and if the angle is too large, it may lead to excessive accumulation and difficulty in unloading. It can also guide the dust to slide down the bevel in an orderly manner during ash discharge. Specifically, the 20° inclination angle can be used for high moisture content materials to reduce the sliding speed of high moisture content materials and prevent splashing, and the 40° inclination angle can be used for fine powder to improve the flow efficiency of fine powder. The baffle 02 is made of 3 mm thick stainless steel square plate, which is not only strong enough to withstand the pressure of dust accumulation, but the square design can also fit perfectly with the ash discharge port, enhancing the sealing when closed and avoiding backflow of gas phase affecting the separation effect.
[0035] The lower end of the obliquely cut ash discharge port is equipped with a V-shaped guide flange. This V-shaped guide flange echoes the structure of the square baffle 02 and the square ash discharge pipe 01, creating a continuous guiding path from dust accumulation to discharge throughout the entire ash discharge process, further improving the efficiency and stability of the automatic ash discharge device. When the baffle 02 opens to discharge ash, the V-shaped structure acts like a funnel, gathering the dispersed dust to the center, reducing dust scattering and adhesion at the edge of the ash discharge port. This is especially beneficial for highly hygroscopic monoammonium phosphate dust, reducing the risk of ash discharge port blockage caused by residual agglomerates.
[0036] In an optional embodiment, the surface of the baffle 02 is provided with a raised texture.
[0037] In this optional embodiment, the raised texture on the surface of the baffle 02 serves to enhance the friction between the dust and the baffle 02 by increasing surface roughness. When the baffle 02 is closed and dust accumulates, this texture helps the accumulated dust adhere more stably to the surface, preventing the dust from slipping off prematurely due to slight vibrations or airflow disturbances, ensuring that a sufficiently high dust layer is formed inside the ash discharge pipe 01 to maintain the sealing effect. When the baffle 02 is opened to release the accumulated dust, the raised texture can disperse the force on the dust, reduce the adhesion of fine dust due to hygroscopicity, and allow the dust to detach from the baffle 02 more smoothly, reducing the possibility of residual accumulation, thereby improving the smoothness of ash discharge while ensuring the sealing effect.
[0038] It should be noted that the above description of the disclosed embodiments enables those skilled in the art to implement or use this application. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the scope of this application. Therefore, this application is not to be limited to the embodiments shown herein, but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.
Claims
1. An automatic ash unloading device, characterized in that, include: Ash pipe, baffle, connecting components and ash receiving trolley; The bottom of the ash discharge pipe is provided with a slanted ash discharge port, and one end of the baffle is movably connected to the upper end of the slanted ash discharge port through the connecting assembly; The shape of the baffle is adapted to the shape of the obliquely cut ash discharge port, and the size of the baffle is larger than the size of the obliquely cut ash discharge port; The ash-receiving handcart is placed within a predetermined distance below the ash-receiving pipe, and the opening of the ash-receiving handcart corresponds to the bottom opening of the ash-receiving pipe. The baffle is used to accumulate dust when the oblique ash discharge port is closed, and to release the accumulated dust when the negative pressure of the ash discharge pipe is out of balance with the weight of the accumulated dust; the ash receiving trolley is used to collect the accumulated dust released by the baffle.
2. The automatic ash unloading device according to claim 1, characterized in that, The connecting assembly includes: a mounting plate, a nut, and a through rod; the mounting plate is a rectangular stainless steel plate, and is disposed at one end of the baffle. A nut is welded to the mounting plate; two nuts are welded to the high end of the obliquely cut ash discharge port, and the distance between the two nuts is the width of one nut, so that the nut on the mounting plate is placed between the two nuts; the through rod passes through the two nuts and the nut on the mounting plate, so that the connecting assembly and the baffle combine to form a hinge structure.
3. The automatic ash unloading device according to claim 1, characterized in that, The lower ash pipe is a vertical stainless steel cylindrical pipe with a nominal diameter of 250 mm; the baffle is a 3 mm thick stainless steel circular plate.
4. The automatic ash unloading device according to claim 3, characterized in that, The obliquely cut ash discharge port is a circular bevel with an angle of 30° between the bevel and the horizontal line, and the diameter of the stainless steel circular plate is 26 cm.
5. The automatic ash unloading device according to claim 3, characterized in that, The lower end of the obliquely cut ash discharge port is provided with an arc-shaped guide concave flange.
6. The automatic ash unloading device according to claim 1, characterized in that, The ash discharge pipe is a vertical stainless steel square pipe, the oblique ash discharge port is a square bevel with an angle of 20° to 40° between the bevel and the horizontal line, and the baffle is a 3 mm thick stainless steel square plate.
7. The automatic ash unloading device according to claim 6, characterized in that, The lower end of the obliquely cut ash discharge port is provided with a V-shaped guide flange.
8. The automatic ash unloading device according to any one of claims 1-7, characterized in that, The surface of the baffle is provided with raised dot texture.