Solid waste treatment device for low-temperature wide-range denitration catalyst recovery

Abstract

The present application relates to the field of solid waste treatment, especially to a solid waste treatment device for low-temperature wide-range denitration catalyst recovery, a crusher, a feeding channel is arranged on the top of the crusher, an inner cavity and an outer cavity are separated by a sub-screen mesh in the feeding channel, a rotating shaft is rotatably arranged in the inner cavity, and helical blades are arranged on the rotating shaft; a plurality of screening holes are arranged in the shaft wall of the rotating shaft, a hollow cavity is arranged in the rotating shaft, when the rotating shaft rotates, small particle materials enter the hollow cavity through the screening holes, and large particle materials enter the outer cavity through the sub-screen mesh. In the present application, the low-temperature wide-range denitration catalyst can be crushed by the crusher, the centrifugal force is generated by the motor driving the rotating shaft, and the bidirectional filtering structure of the sub-screen mesh and the rotating shaft screening hole is combined to automatically remove the large particles that can easily cause tool wear and the small particles that can easily cause secondary pollution in advance, so that the over-grinding phenomenon is avoided, and the probability of secondary pollution is reduced.

Description

Technical Field

[0001] This invention relates to the field of solid waste treatment technology, and in particular to a solid waste treatment device for recovering low-temperature wide-range denitrification catalyst. Background Technology

[0002] Low-temperature, wide-range denitrification catalysts are widely used in the purification of flue gas from complex processes such as steel sintering, coking, and waste incineration due to their ability to maintain high denitrification efficiency at relatively low temperatures. However, as their service life ends, a large amount of deactivated catalyst becomes solid waste requiring immediate treatment. Crushing is the primary step in resource recovery processes.

[0003] Traditional catalyst crushing equipment typically employs a full-feed method, meaning that all materials, regardless of their original size, are fed into the crushing chamber. A large number of fine particles already present in the raw material are repeatedly crushed into ultrafine powder upon entering the crushing chamber. This not only results in significant energy waste but also leads to dust pollution, increasing the load on the dust collection system. Furthermore, the fine powder easily accumulates toxic impurities from flue gas, reducing the quality of the recovered product. Conversely, larger particles in the raw material, entering the crushing mechanism directly without pre-screening, are prone to mechanical impact, leading to accelerated wear of the crushing blades and affecting their service life. Therefore, there is an urgent need for a low-temperature, wide-range denitrification catalyst recovery solid waste crushing and treatment device with filtration capabilities. Summary of the Invention

[0004] The purpose of this invention is to address the shortcomings of existing technologies by proposing a solid waste treatment device for low-temperature wide-range denitrification catalyst recovery.

[0005] To achieve the above objectives, the present invention adopts the following technical solution: A solid waste treatment device for recovering low-temperature wide-range denitrification catalyst includes a crusher. The top of the crusher is provided with a feeding channel, which is divided into an inner cavity and an outer cavity by a sub-screen. A rotating shaft is rotatably arranged in the inner cavity, and a spiral blade is provided on the rotating shaft. Multiple screening holes are opened in the shaft wall of the rotating shaft, and a hollow cavity is opened inside the rotating shaft. When the rotating shaft rotates, small particles of material enter the hollow cavity through the screening holes, and large particles of material enter the outer cavity through the sub-screen.

[0006] Furthermore, a preferred configuration is that the filter diameter of the sub-screen is larger than the filter diameter of the sieve aperture.

[0007] In addition, a preferred structure is that the bottom of the feeding channel is provided with an arc-shaped slope, and the arc-shaped slopes on both sides are arranged opposite to each other.

[0008] Furthermore, in a preferred configuration, discharge pipes communicating with the outer cavity are installed on both sides of the feeding channel, and the discharge pipes are all installed at the lower part of the arc-shaped slope.

[0009] In addition, a preferred structure is that a discharge plate is provided at the bottom of the rotating shaft, the rotating shaft and the discharge plate are rotatably connected by a bearing, and the hollow cavity is connected to the discharge plate.

[0010] Furthermore, a preferred structure is that the discharge plate has a slope, and the rotating shaft is located at the high point of the slope.

[0011] Furthermore, in a preferred configuration, both the discharge pipe and the discharge plate are equipped with solenoid valves at their discharge ends.

[0012] Furthermore, a preferred configuration is that a feed hopper is installed on the top of the crusher, and the feed hopper communicates with the inner cavity.

[0013] Furthermore, in a preferred configuration, a motor is mounted on the top of the crusher, and the motor is connected to the rotating shaft via a drive.

[0014] The beneficial effects of this invention are as follows: the low-temperature wide-range denitrification catalyst can be crushed by the crusher. The centrifugal force generated by the motor-driven rotating shaft, combined with the bidirectional filtration structure of the sub-screen and the rotating shaft screening holes, automatically removes large particles that are prone to blade wear and small particles that are prone to secondary pollution before the material enters the crusher. Only medium-sized particles that are most suitable for crushing are retained to enter the crusher, which not only avoids over-grinding, but also reduces the probability of secondary pollution. Attached Figure Description

[0015] Figure 1 This is a schematic diagram of a solid waste treatment device for low-temperature wide-range denitrification catalyst recovery proposed in this invention; Figure 2 This is a schematic diagram of the feeding channel proposed in this invention; Figure 3 for Figure 2 A schematic diagram of the internal structure of the feeding channel in the middle; Figure 4 for Figure 3 A schematic diagram of the structure after the rotation axis is hidden; Figure 5 for Figure 4 A schematic diagram of the structure after the sub-sieve is hidden; Figure 6 This is a schematic diagram of the rotating shaft and discharge plate proposed in this invention; Figure 7 for Figure 6 A schematic diagram of the internal structure of the rotating shaft and the discharge plate.

[0016] In the diagram: 1 Crusher, 2 Feeding channel, 20 Sub-screen, 201 Inner cavity, 202 Outer cavity, 21 Motor, 22 Feeding hopper, 23 Discharge pipe, 231 Arc-shaped slope, 3 Rotating shaft, 31 Hollow cavity, 32 Discharge plate, 321 Slope, 33 Spiral blade. Detailed Implementation

[0017] The technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present invention. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments.

[0018] Reference Figure 1-7 A solid waste treatment device for recovering low-temperature wide-range denitrification catalyst includes a crusher 1. A feed hopper 22 is installed on the top of the crusher 1, and the feed hopper 22 is connected to the inner cavity 201 of the feed channel 2 provided below. A motor 21 is installed on the top of the crusher 1, and the motor 21 is drivenly connected to the rotating shaft 3 in the feed channel 2.

[0019] The feed channel 2 is divided into an inner cavity 201 and an outer cavity 202 by a sub-screen 20. A rotating shaft 3 is rotatably mounted in the inner cavity 201, and a spiral blade 33 is mounted on the rotating shaft 3. Multiple screening holes are formed in the shaft wall of the rotating shaft 3, and a hollow cavity 31 is formed inside the rotating shaft 3. It is worth noting that the filter diameter of the sub-screen 20 is larger than the filter diameter of the screening holes.

[0020] The bottom of the feeding channel 2 is provided with an arc-shaped slope 231, and the arc-shaped slopes 231 on both sides are arranged opposite each other. Discharge pipes 23 communicating with the outer cavity 202 are installed on both sides of the feeding channel 2, and the discharge pipes 23 are all installed at the lower part of the arc-shaped slopes 231. The arc-shaped slopes 231 allow the material entering the outer cavity 202 to smoothly slide to both sides under the action of gravity and be discharged through the discharge pipes 23.

[0021] The rotating shaft 3 has a discharge plate 32 at its bottom, and the rotating shaft 3 and the discharge plate 32 are rotatably connected by bearings to ensure that the discharge plate 32 remains stationary when the rotating shaft 3 rotates at high speed. The hollow cavity 31 is connected to the discharge plate 32. The discharge plate 32 has a slope 321 inside, and the rotating shaft 3 is located at the higher part of the slope 321. The slope 321 allows fine materials entering the hollow cavity 31 to automatically slide down and be discharged.

[0022] Both the discharge pipe 23 and the discharge plate 32 are equipped with solenoid valves at their discharge ends. The opening and closing of these solenoid valves allows for controlled discharge of both large and small particles of material filtered out. This is a common valve control method in existing technology and will not be elaborated upon further.

[0023] In this embodiment, when crushing the waste low-temperature wide-range denitrification catalyst, the motor 21 is first started, and the motor 21 drives the rotating shaft 3 and the spiral blades 33 in the feed channel 2 to rotate. Then, the catalyst solid waste raw material to be processed is fed into the inner cavity 201 through the feed hopper 22.

[0024] Furthermore, the material is propelled downwards within the inner cavity 201 by the rotation of the spiral blades 33, while simultaneously being subjected to a strong centrifugal force generated by the high-speed rotation. Due to the differences in mass and inertia of particles of different sizes, the material undergoes centrifugal classification during this process.

[0025] Large particles in the raw materials have a large mass and high inertia, and are subjected to the strongest centrifugal force. They are thrown outward, pass through the sub-screen 20 with a larger filter diameter, enter the outer cavity 202, fall onto the arc-shaped slope 231, and are discharged through the discharge pipe 23.

[0026] The small particles in the raw material are lightweight and have low inertia. They are minimally affected by the displacement caused by centrifugal force and remain in the central area. They enter the hollow cavity 31 through the screening holes on the shaft wall of the rotating shaft 3 and are finally discharged along the slope 321 of the discharge plate 32.

[0027] The medium-sized particles being processed are subjected to moderate centrifugal force, which prevents them from passing through the outer sub-screen 20 and also prevents them from entering the hollow cavity 31 due to their larger particle size than the inner screening holes. They are ultimately trapped in the inner cavity 201 and fed directly downwards into the crusher 1 for processing by the spin of the spiral blades 33.

[0028] This allows for the automatic removal of large particles that could cause tool wear and small particles that could lead to secondary pollution before the material enters the crusher 1, leaving only medium-sized particles that are most suitable for crushing and processing to enter the crusher 1. This not only avoids over-grinding but also reduces the probability of secondary pollution.

[0029] In this invention, the low-temperature wide-range denitrification catalyst can be crushed by the crusher 1. The centrifugal force is generated by the rotating shaft 3 driven by the motor 21, and combined with the bidirectional filtration structure of the sub-screen 20 and the screening holes of the rotating shaft 3, large particles that are easy to cause blade wear and small particles that are easy to cause secondary pollution are automatically removed in advance before the material enters the crusher 1. Only medium-sized particles that are most suitable for crushing are retained to enter the crusher 1, which not only avoids over-grinding, but also reduces the probability of secondary pollution.

[0030] 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 solid waste treatment device for recovering low-temperature wide-range denitrification catalyst, comprising a crusher (1), characterized in that, The top of the crusher (1) is provided with a feeding channel (2), and the inner cavity (201) and the outer cavity (202) are separated by a sub-screen (20). A rotating shaft (3) is rotatably provided in the inner cavity (201), and a spiral blade (33) is provided on the rotating shaft (3). The rotating shaft (3) has multiple screening holes in its shaft wall and a hollow cavity (31) inside. When the rotating shaft (3) rotates, small particles enter the hollow cavity (31) through the screening holes, and large particles enter the outer cavity (202) through the sub-screen (20).

2. The solid waste treatment device for low-temperature wide-range denitrification catalyst recovery according to claim 1, characterized in that, The filter diameter of the sub-sieve (20) is larger than the filter diameter of the sieve hole.

3. The solid waste treatment device for low-temperature wide-range denitrification catalyst recovery according to claim 1, characterized in that, The bottom of the feeding channel (2) is provided with an arc-shaped slope (231), and the arc-shaped slopes (231) on both sides are arranged opposite to each other.

4. A solid waste treatment device for recovering a low-temperature wide-range denitrification catalyst according to claim 3, characterized in that, Both sides of the feeding channel (2) are equipped with discharge pipes (23) that communicate with the outer cavity (202), and the discharge pipes (23) are all installed at the low point of the arc-shaped slope (231).

5. A solid waste treatment device for recovering a low-temperature wide-range denitrification catalyst according to claim 4, characterized in that, The bottom of the rotating shaft (3) is provided with a discharge plate (32), and the rotating shaft (3) and the discharge plate (32) are rotatably connected by bearings, and the hollow cavity (31) is connected to the discharge plate (32).

6. A solid waste treatment device for recovering a low-temperature wide-range denitrification catalyst according to claim 5, characterized in that, The discharge plate (32) has a slope (321) inside, and the rotating shaft (3) is located at the high point of the slope (321).

7. A solid waste treatment device for recovering a low-temperature wide-range denitrification catalyst according to claim 6, characterized in that, Solenoid valves are installed at the discharge ends of the discharge pipe (23) and the discharge plate (32).

8. A solid waste treatment device for recovering a low-temperature wide-range denitrification catalyst according to claim 1, characterized in that, The crusher (1) is equipped with a feed hopper (22) on top, and the feed hopper (22) is connected to the inner cavity (201).

9. A solid waste treatment device for recovering a low-temperature wide-range denitrification catalyst according to claim 1, characterized in that, The crusher (1) is equipped with a motor (21) on top, and the motor (21) is connected to the rotating shaft (3) for transmission.

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