Energy-saving and emission-reducing device for thermal power plant based on sis system
By setting a brush inside the screening box to contact the screen plate, the brush is driven by the forward and reverse rotation of the crushing mechanism to clean the screen plate, which solves the problem of easy clogging of the screen plate and achieves the effects of efficient screening and extended component life.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- CHINA COAL XINJI ENERGY CO LTD
- Filing Date
- 2025-08-27
- Publication Date
- 2026-08-04
AI Technical Summary
In the prior art, the screening plates of the screening components are easily covered and blocked by coal dust particles after long-term use, which leads to a decrease in screening efficiency and affects the overall operating efficiency of the device.
Inside the screening box, a brush is installed to contact the bottom of the screen plate. A connecting component is installed between the support rod on the inner wall of the rotating ring and the main shaft of the crushing mechanism. The forward and reverse rotation of the crushing mechanism drives the brush to clean the screen plate and prevent blockage.
It effectively prevents screen plate clogging, extends brush life, improves screening efficiency, ensures coal particle size meets requirements, and avoids accelerated wear.
Smart Images
Figure CN224586013U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of power generation energy conservation and emission reduction equipment technology, and in particular to an energy conservation and emission reduction device for thermal power plants based on the SIS system. Background Technology
[0002] A thermal power plant, or coal-fired power plant for short, is a factory that uses combustible materials (such as coal) as fuel to produce electricity. Thermal power plants typically rely on SIS safety systems and employ multiple grinding or crushing methods to reduce the particle size of coal, allowing for more complete combustion of the coal in the boiler, thereby reducing the generation of harmful gases and achieving the goals of energy conservation and emission reduction.
[0003] Patent CN217594791U discloses an energy-saving and emission-reduction device for thermal power plants based on a SIS system, relating to the field of power generation energy-saving and emission-reduction equipment. The device includes a fixed platform and an installation platform. A conveyor belt is installed on the fixed platform, with a feed hopper and a conveying plate mounted on it. A coal mill is installed on one side of the fixed platform, with a discharge hopper on the coal mill. One end of the conveying plate is positioned above the discharge hopper. A conveying pipe is connected to the discharge port of the coal mill. The conveying pipe is inclined and connects to a screening box. The screening box is equipped with a screening component, a vibrating motor, a first discharge port, and a second discharge port. An elevator is installed on one side of the first discharge port, with a discharge pipe connected to the discharge port of the elevator. The device grinds coal into powder and then feeds it into the boiler for complete combustion, significantly improving thermal efficiency and reducing the generation of large amounts of harmful gases caused by incomplete combustion, thus achieving the goal of energy saving and emission reduction in thermal power plants.
[0004] In the aforementioned patents, the mesh of the screening plate in the screening component is easily covered and clogged by some coal mine dust particles after prolonged use, thereby reducing the screening effect of the screening plate on coal mine dust and affecting the efficiency of the device. Therefore, this utility model proposes an energy-saving and emission-reduction device for thermal power plants based on the SIS system to address the shortcomings of the prior art. Utility Model Content
[0005] To address the aforementioned problems, the purpose of this utility model is to provide an energy-saving and emission-reduction device for thermal power plants based on the SIS system. By setting a brush at the top of the rotating ring of the unblocking mechanism inside the screening box to contact the bottom of the screen plate, and by setting a connecting component between the support rod on the inner wall of the rotating ring and the main shaft of the crushing mechanism, the brush can be driven to clean the screen plate during the reverse operation of the crushing mechanism, preventing the screen plate from being blocked and affecting the screening efficiency.
[0006] To achieve the above objectives, this utility model provides the following technical solution: An energy-saving and emission-reduction device for a thermal power plant based on a SIS system includes a screening box, a sieve plate, a crushing mechanism, and a dredging mechanism. The sieve plate is installed in the middle section of the screening box, and the crushing mechanism is rotatably installed on the upper part of the screening box. The unblocking mechanism includes a rotating ring, a support rod, a brush, and a connecting assembly. The rotating ring is located below the sieve plate and is rotatably mounted to the inner wall of the screening box. The support rod is provided on the inner wall of the rotating ring, and a brush is provided on the top of the support rod. The top of the brush contacts the bottom of the sieve plate. The connecting assembly includes a telescopic component and a roller. The fixed end of the telescopic component is connected to the crushing mechanism, and the free end of the telescopic component is rotatably mounted with a roller. The end of the support rod near the roller has an inclined structure.
[0007] A further improvement is that the crushing mechanism includes a main shaft and crushing blades. The main shaft is located at the center of the screening box. The upper end of the main shaft is rotatably installed inside the screening box. The main shaft is rotatably connected to the center hole of the screen plate. The crushing blades are symmetrically arranged above the screen plate and connected to the outer wall of the main shaft.
[0008] A further improvement is that a conveying pipe is provided on one side of the top of the screening box, and a forward and reverse drive motor is provided at the center of the top of the screening box. The main shaft is driven to rotate by the forward and reverse drive motor.
[0009] A further improvement is that the telescopic component includes a fixed sleeve rod and a sliding rod, one end of the fixed sleeve rod is connected to the outer wall of the main shaft, one end of the sliding rod is slidably connected to the inside of the fixed sleeve rod, and the roller is rotatably mounted on one end of the sliding rod.
[0010] A further improvement is that: a downward pressure rod is inclined at the bottom of the side of the rotating ring away from the support rod, and a feeding plate is inclined at the bottom inside the screening box. The lower end of the feeding plate is hinged to the inner wall of the screening box, and the upper end of the feeding plate is connected to the inner wall of the screening box through an elastic diaphragm.
[0011] A further improvement is that the upper part of the screening box is cylindrical and the lower part is cubic, and a discharge slot is provided on the side wall of the lower part of the screening box near the lower end of the feeding plate.
[0012] The beneficial effects of this utility model are as follows: By setting a brush at the top of the rotating ring of the unblocking mechanism inside the screening box to contact the bottom of the screen plate, and by setting a connecting component between the support rod on the inner wall of the rotating ring and the main shaft of the crushing mechanism, the telescopic part of the connecting component can be compressed during the forward rotation of the main shaft, and the rotating ring cannot be driven to rotate synchronously through the connecting component. The device can only fully crush large-diameter coal through the crushing mechanism so that it can be screened through the screen plate, avoiding the continuous rotation of the brush and other parts and accelerating wear, thus extending the service life of the brush. During the reverse rotation of the main shaft, the telescopic part can be stretched by centrifugal force. After being stretched, it can rotate with the main shaft and thus contact the support rod to drive the rotating ring to rotate. This allows the brush at the top of the support rod to clean the bottom of the screen plate, preventing the screen plate from clogging and affecting the screening efficiency.
[0013] This invention features an inclined pressing rod at the bottom of a rotating ring. As the ring rotates, the pressing rod rotates synchronously, intermittently pressing down on a flexibly installed feeding plate to cause vibration. This allows the crushed coal on the feeding plate to be quickly discharged from the discharge chute, preventing the coal from clogging the feeding plate. Attached Figure Description
[0014] Figure 1 This is a three-dimensional structural schematic diagram of the present utility model; Figure 2 This is a schematic diagram of the main structure of this utility model; Figure 3 This is a schematic front view of the telescopic component structure of this utility model; Figure 4 This is a top view of the installation structure of the telescopic component of this utility model.
[0015] The components include: 1. Screening box; 2. Screen plate; 3. Rotary ring; 4. Support rod; 5. Brush; 6. Telescopic component; 601. Fixed sleeve rod; 602. Sliding rod; 7. Roller; 8. Main shaft; 9. Crushing blade; 10. Feeding pipe; 11. Forward and reverse drive motor; 12. Pressing rod; 13. Feeding plate; 14. Elastic diaphragm; 15. Discharge trough. Detailed Implementation
[0016] To deepen the understanding of this utility model, the following detailed description will be provided in conjunction with embodiments. These embodiments are only used to explain this utility model and do not constitute a limitation on the scope of protection of this utility model.
[0017] Example 1 according to Figure 1-4As shown in the figure, this embodiment proposes an energy-saving and emission-reduction device for thermal power plants based on a SIS system, including a screening box 1, a screen plate 2, a crushing mechanism, and a clearing mechanism. The screen plate 2 is installed in the middle of the screening box 1, and the crushing mechanism is rotatably installed inside the upper part of the screening box 1. The clearing mechanism includes a rotating ring 3, a support rod 4, a brush 5, and a connecting assembly. The rotating ring 3 is located below the screen plate 2 and is rotatably installed with the inner wall of the screening box 1. The support rod 4 is provided on the inner wall of the rotating ring 3, and the brush 5 is provided on the top of the support rod 4. The top of the brush 5 contacts the bottom of the screen plate 2. The connecting assembly includes a telescopic member 6 and a roller 7. The fixed end of the telescopic member 6 is connected to the crushing mechanism, and the free end of the telescopic member 6 is rotatably installed with the roller 7. The end of the support rod 4 near the roller 7 has an inclined structure.
[0018] When the energy-saving and emission-reduction device for thermal power plants based on the SIS system of this utility model is in operation, the device as a whole can be used in conjunction with the original SIS safety system of the thermal power plant to achieve energy saving and emission reduction. The original SIS system of the thermal power plant is public technology and will not be described in detail here. When the crushing mechanism is controlled to rotate forward, the crushing mechanism continuously crushes the large-diameter coal particles that cannot pass through the screen plate 2 until the coal particles can pass through the screen plate 2. During the crushing process of the crushing mechanism rotating forward, the roller 7 will collide with one end of the support rod 4 when it rotates. At the same time as the collision, the roller 7 will contact the inclined structure of the support rod 4. As the crushing continues, Under the guidance, the rotating roller 7 is pressed against the main shaft 8, so that the roller 7 can disengage from the inclined structure of the support rod 4. At this time, the telescopic part 6 is shortened, the connecting component cannot apply force to the support rod 4, the rotating ring 3 cannot rotate, and the brush does not rotate synchronously, thus avoiding the brush and other parts from rotating continuously and accelerating wear, and extending the service life of the brush. When the crushing mechanism reverses and crushes, the inclined structure of the support rod 4 will abut against the telescopic part 6 and the roller 7, so that the support rod 4 will also drive the rotating ring 3 to rotate synchronously during the rotation of the main shaft 8, thereby driving the brush 5 to rotate and clean the bottom of the screen plate 2.
[0019] The crushing mechanism includes a main shaft 8 and crushing blades 9. The main shaft 8 is located at the center of the screening box 1, and its upper end is rotatably mounted to the upper part of the screening box 1. The main shaft 8 is rotatably connected to the central hole on the screen plate 2. The crushing blades 9 are symmetrically arranged above the screen plate 2 and connected to the outer wall of the main shaft 8. A feed pipe 10 is located on one side of the top of the screening box 1, and a forward / reverse drive motor 11 is located at the center of the top of the screening box 1. The main shaft 8 is driven to rotate by the forward / reverse drive motor 11. When the forward / reverse drive motor 11 is activated, it drives the main shaft 8 to rotate, thereby continuously crushing the large coal particles intercepted on the screen plate 2 by the crushing blades 9.
[0020] The telescopic component 6 includes a fixed sleeve rod 601 and a sliding rod 602. One end of the fixed sleeve rod 601 is connected to the outer wall of the main shaft 8, and one end of the sliding rod 602 is slidably connected to the inside of the fixed sleeve rod 601. The roller 7 is rotatably mounted on one end of the sliding rod 602. The sliding rod 602 can slide at one end of the fixed sleeve rod 601 to perform telescopic movement. The telescopic component 6 can connect the roller 7 to the main shaft 8. The roller 7 can reduce the resistance and wear when it comes into contact with the inclined structure of the support rod 4 by rotating on its own.
[0021] Example 2 according to Figure 1-4 As shown in the figure, this embodiment proposes an energy-saving and emission-reduction device for thermal power plants based on a SIS system, including a screening box 1, a screen plate 2, a crushing mechanism, and a clearing mechanism. The screen plate 2 is installed in the middle of the screening box 1, and the crushing mechanism is rotatably installed inside the upper part of the screening box 1. The clearing mechanism includes a rotating ring 3, a support rod 4, a brush 5, and a connecting assembly. The rotating ring 3 is located below the screen plate 2 and is rotatably installed with the inner wall of the screening box 1. The support rod 4 is provided on the inner wall of the rotating ring 3, and the brush 5 is provided on the top of the support rod 4. The top of the brush 5 contacts the bottom of the screen plate 2. The connecting assembly includes a telescopic member 6 and a roller 7. The fixed end of the telescopic member 6 is connected to the crushing mechanism, and the free end of the telescopic member 6 is rotatably installed with the roller 7. The end of the support rod 4 near the roller 7 has an inclined structure.
[0022] The rotating ring 3 has a downward pressure rod 12 inclined at its bottom on the side opposite to the support rod 4. A feeding plate 13 is inclined at the bottom inside the screening box 1. The lower end of the feeding plate 13 is hinged to the inner wall of the screening box 1, and the upper end of the feeding plate 13 is connected to the inner wall of the screening box 1 through an elastic diaphragm 14. The upper part of the screening box 1 is cylindrical, and the lower part is cubic. A discharge slot 15 is provided on the lower side wall of the screening box 1 near the lower end of the feeding plate 13. When the rotating ring 3 of this invention rotates, it drives the downward pressure rod 12 to rotate synchronously, causing the downward pressure rod 12 to intermittently press the inclined feeding plate 13. The feeding plate 13 vibrates under the elastic connection of the elastic diaphragm 14, thereby discharging the crushed coal ore from the discharge slot 15.
[0023] This invention features a brush 5 on top of the rotating ring 3 of the unblocking mechanism inside the screening box 1, which contacts the bottom of the screen plate 2. A connecting component is installed between the support rod 4 on the inner wall of the rotating ring 3 and the main shaft 8 of the crushing mechanism. During the forward rotation of the main shaft 8, the telescopic component 6 of the connecting component can be compressed, preventing the rotating ring 3 from being driven to rotate synchronously through the connecting component. The device can only fully crush large-diameter coal ore through the crushing mechanism so that it can be screened through the screen plate 2, avoiding the continuous rotation of components such as the brush 5 and accelerating wear, thus extending the service life of the brush. During the reverse rotation of the main shaft 8, the telescopic component 6 can be stretched by centrifugal force. After being stretched, it can rotate with the main shaft 8 and thus contact the support rod 4, driving the rotating ring 3 to rotate as well. This allows the brush 5 on the top of the support rod 4 to clean the bottom of the screen plate 2, preventing the screen plate 2 from becoming clogged and affecting the screening efficiency. This invention features an inclined pressing rod at the bottom of the rotating ring 3. During the rotation of the rotating ring 3, the pressing rod 12 rotates synchronously. The pressing rod 12 intermittently presses down on the flexibly installed feeding plate 13 to cause vibration, thereby quickly discharging the crushed coal from the discharge chute 15 on the feeding plate 13 and preventing the coal from clogging the feeding plate 13.
[0024] The foregoing has shown and described the basic principles, main features, and advantages of this utility model. Those skilled in the art should understand that this utility model is not limited to the above embodiments. The embodiments and descriptions in the specification are merely illustrative of the principles of this utility model. Various changes and modifications can be made to this utility model without departing from its spirit and scope, and all such changes and modifications fall within the scope of the claimed utility model. The scope of protection of this utility model is defined by the appended claims and their equivalents.
Claims
1. An energy-saving and emission-reduction device for thermal power plants based on a SIS system, characterized in that: It includes a screening box (1), a sieve plate (2), a crushing mechanism and a clearing mechanism. The sieve plate (2) is installed in the middle of the screening box (1), and the crushing mechanism is rotatably installed on the upper part of the screening box (1). The unblocking mechanism includes a rotating ring (3), a support rod (4), a brush (5), and a connecting assembly. The rotating ring (3) is located below the sieve plate (2) and is rotatably installed on the inner wall of the screening box (1). The inner wall of the rotating ring (3) is provided with a support rod (4). The top of the support rod (4) is provided with a brush (5). The top of the brush (5) is in contact with the bottom of the sieve plate (2). The connecting assembly includes a telescopic component (6) and a roller (7). The fixed end of the telescopic component (6) is connected to the crushing mechanism. The free end of the telescopic component (6) is rotatably installed with a roller (7). The end of the support rod (4) near the roller (7) has an inclined structure.
2. The energy-saving and emission-reduction device for thermal power plants based on a SIS system according to claim 1, characterized in that: The crushing mechanism includes a main shaft (8) and crushing blades (9). The main shaft (8) is located at the center of the screening box (1). The upper end of the main shaft (8) is rotatably installed inside the screening box (1), and the main shaft (8) is rotatably connected to the center hole on the sieve plate (2). The crushing blades (9) are symmetrically arranged above the sieve plate (2) and connected to the outer wall of the main shaft (8).
3. The energy-saving and emission-reduction device for thermal power plants based on a SIS system according to claim 2, characterized in that: The screening box (1) is provided with a conveying pipe (10) on one side of the top, and a forward and reverse drive motor (11) is provided at the center of the top of the screening box (1). The main shaft (8) is driven to rotate by the forward and reverse drive motor (11).
4. The energy-saving and emission-reduction device for thermal power plants based on a SIS system according to claim 1, characterized in that: The telescopic component (6) includes a fixed sleeve rod (601) and a sliding rod (602). One end of the fixed sleeve rod (601) is connected to the outer wall of the main shaft (8), and one end of the sliding rod (602) is slidably connected to the inside of the fixed sleeve rod (601). The roller (7) is rotatably installed at one end of the sliding rod (602).
5. The energy-saving and emission-reduction device for thermal power plants based on a SIS system according to claim 1, characterized in that: The rotating ring (3) is inclined with a pressing rod (12) on the side away from the support rod (4). The screening box (1) is inclined with a feeding plate (13) inside the lower part. The lower end of the feeding plate (13) is hinged to the inner wall of the screening box (1). The upper end of the feeding plate (13) is connected to the inner wall of the screening box (1) through an elastic diaphragm (14).
6. The energy-saving and emission-reduction device for thermal power plants based on a SIS system according to claim 5, characterized in that: The upper part of the screening box (1) is cylindrical and the lower part is cubic. The lower part of the screening box (1) is provided with a discharge slot (15) on the side wall near the lower end of the feeding plate (13).