A mixing device for preparing flue gas denitrification catalyst

Abstract

This utility model discloses a mixing device for preparing a flue gas denitrification catalyst, relating to the field of denitrification catalyst preparation. It addresses the problem in existing technologies where rotating the mixing tank causes raw materials to accumulate on the sidewalls, creating cavities in the center and hindering effective mixing by the stirring blades. A lifting cylinder is rotatably mounted at the lower end of a first limiting tube. Four L-shaped dispersing tubes are fixedly connected in a circular array at the upper end of the lifting cylinder. A first rotating shaft is rotatably connected to the center of the lifting cylinder, and spiral lifting blades are fixedly connected to the first rotating shaft. A second rotating shaft is rotatably mounted inside the second limiting tube, with its lower end extending out of the second limiting tube and fixedly connected to a dispersing disc. By combining the spiral lifting blades with the L-shaped dispersing tubes, the raw materials achieve circulating flow and uniform dispersion within the mixing tank, effectively solving the problem of raw materials accumulating on the sidewalls due to centrifugal force, thus affecting mixing quality.

Description

Technical Field

[0001] This utility model relates to the field of denitrification catalyst preparation, specifically a flue gas denitrification catalyst preparation mixing device. Background Technology

[0002] Denitrification catalysts are key materials used to reduce nitrogen oxide emissions from industrial waste gases, primarily applied in flue gas treatment systems in coal-fired power plants, steel mills, and chemical plants. Their core function is to convert harmful NOx into harmless nitrogen and water through catalytic reactions. Common denitrification technologies include selective catalytic reduction (SCR) and selective non-catalytic reduction (SNR), with SCR catalysts exhibiting higher efficiency at high temperatures, achieving removal rates exceeding 90%. Catalysts typically use titanium dioxide as a support, loading the active components and possessing high activity, resistance to sulfur poisoning, and wear resistance. During the production of denitrification catalysts, thorough mixing of the raw materials is required using a mixing device.

[0003] For example, authorization announcement number CN219399848U discloses a mixing device for the production of denitrification catalysts, including a mounting column, a junction box fixedly installed at the front end of the mounting column, a rotating top plate movably installed at the upper end of the mounting column, a rotating mixing tank fixedly connected to the upper end of the rotating top plate, and a motor mounting plate fixedly installed inside the mounting column. This utility model's mixing device for the production of denitrification catalysts utilizes a drive motor to rotate stirring blades within the rotating mixing tank, mixing the denitrification catalyst raw materials. Furthermore, a synchronous rotation structure composed of a drive gear, transmission gear, and driven gear can drive the rotating mixing tank to rotate synchronously in the opposite direction, increasing the efficiency of stirring the denitrification catalyst raw materials within the rotating mixing tank, enabling more efficient mixing and processing. Moreover, it uses only a single motor drive, resulting in a simple and easy-to-maintain overall structure, making it more convenient for the production and mixing of denitrification catalyst raw materials.

[0004] In the above-mentioned technology, the mixing device mixes the raw materials by rotating the mixing tank and the stirring blades in opposite directions. However, when the mixing tank rotates, the raw materials will gather towards the side wall of the mixing tank under the action of centrifugal force, forming a cavity in the middle of the raw materials. As a result, the stirring blades in the center of the raw materials cannot effectively stir the raw materials, affecting the mixing efficiency. Therefore, the market urgently needs to develop a mixing device for the preparation of flue gas denitrification catalyst to help people solve the existing problems. Utility Model Content

[0005] The purpose of this invention is to provide a mixing device for preparing flue gas denitrification catalyst, in order to solve the problem mentioned in the background art where the mixing device mixes the raw materials by rotating the mixing tank and stirring blades in opposite directions. However, when the mixing tank rotates, the raw materials will gather towards the side wall of the mixing tank under the action of centrifugal force, forming a cavity in the middle of the raw materials. This results in the stirring blades at the center of the raw materials being unable to effectively stir the raw materials, thus affecting the mixing efficiency of the raw materials.

[0006] To achieve the above objectives, this utility model provides the following technical solution: a flue gas denitrification catalyst preparation and mixing device, comprising a mixing tank, a first limiting tube fixedly connected to the upper middle part of the mixing tank, a lifting cylinder rotatably arranged at the lower end of the first limiting tube, four L-shaped dispersing tubes fixedly connected in a ring array at the upper end of the lifting cylinder, a first rotating shaft rotatably connected to the middle part of the lifting cylinder, the lower end of the first rotating shaft extending out of the lower end of the lifting cylinder, a spiral lifting blade fixedly connected to the first rotating shaft, and four second limiting tubes fixedly connected in a ring array at the upper end of the mixing tank, a second rotating shaft rotatably arranged inside the second limiting tube, the lower end of the second rotating shaft extending out of the lower end of the second limiting tube and fixedly connected to a dispersing disc.

[0007] Preferably, a feed pipe is fixedly connected to the upper end of one side of the mixing tank, and a discharge pipe is fixedly connected to the middle of the lower end of the mixing tank, with a discharge valve fixedly connected to the discharge pipe.

[0008] Preferably, a first driving device is fixedly connected to the upper end of the mixing tank and the upper end of the first limiting tube. A first driving motor is fixedly installed on one side inside the first driving device, and a third conical tooth is fixedly connected to the output shaft of the first driving motor.

[0009] Preferably, a rotating column is fixedly connected to the middle of the upper end of the four L-shaped dispersion tubes. The upper end of the rotating column extends into the first driving device and is fixedly connected to a first bevel gear. The upper end of the first rotating shaft passes through the middle of the rotating column and extends out of the upper end of the rotating column. The upper end of the first rotating shaft is fixedly connected to a second bevel gear inside the first driving device.

[0010] Preferably, the second bevel tooth and the first bevel gear are respectively engaged with the upper and lower ends of the third bevel tooth.

[0011] Preferably, a second driving device is fixedly connected to the upper end of the mixing tank and to the upper end of each of the four second limiting tubes, and a second driving motor is fixedly installed inside the second driving device.

[0012] Preferably, the upper end of the second rotating shaft extends through the middle of the second limiting tube into the interior of the second driving device and is fixedly connected to the output shaft of the second driving motor.

[0013] Compared with the prior art, the beneficial effects of this utility model are:

[0014] (1) In this utility model, by setting the combination structure of spiral lifting blades and L-shaped dispersing tube, the raw materials are circulated and uniformly dispersed in the mixing tank, which effectively solves the problem of the raw materials accumulating on the side wall and forming a central cavity due to centrifugal force in traditional mixing devices, and significantly improves the mixing efficiency.

[0015] (2) In this utility model, multiple high-speed rotating dispersion discs are used to perform secondary dispersion and crushing of the falling raw materials, which enhances the mixing effect, ensures that the components of the catalyst are fully and evenly mixed, and improves the quality and performance of the final product.

[0016] (3) In this utility model, the design of driving the lifting cylinder and stirring shaft to rotate in opposite directions by the first driving device and driving the dispersion disk by the second driving device realizes the synergistic effect of multiple mixing mechanisms, which simplifies the transmission structure, reduces maintenance costs, and improves the reliability and economy of the device while ensuring the mixing effect. Attached Figure Description

[0017] Figure 1 This is a front view of a flue gas denitrification catalyst preparation and mixing device according to the present invention;

[0018] Figure 2 This is a front sectional view of the present invention;

[0019] Figure 3 This is a side sectional view of the present invention;

[0020] Figure 4 This is a side sectional view of the dispersion disc of this utility model.

[0021] In the diagram: 1. Mixing tank; 101. Feed pipe; 102. Discharge pipe; 103. Discharge valve; 104. First limiting pipe; 105. Second limiting pipe; 2. Lifting cylinder; 201. L-shaped dispersing pipe; 202. Rotating column; 203. First bevel gear; 3. First rotating shaft; 301. Spiral lifting blade; 302. Second bevel gear; 4. First driving device; 401. First driving motor; 402. Third bevel gear; 5. Second rotating shaft; 501. Dispersing disc; 6. Second driving device; 601. Second driving motor. Detailed Implementation

[0022] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present utility model. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments.

[0023] Please see Figure 1-4This utility model provides an embodiment of a flue gas denitrification catalyst preparation mixing device, comprising a mixing tank 1. A first limiting tube 104 is fixedly connected to the upper middle part of the mixing tank 1. A lifting cylinder 2 is rotatably arranged at the lower end of the first limiting tube 104. Four L-shaped dispersing tubes 201 are fixedly connected in a ring array at the upper end of the lifting cylinder 2. A first rotating shaft 3 is rotatably connected to the middle part of the lifting cylinder 2. The lower end of the first rotating shaft 3 extends out of the lower end of the lifting cylinder 2. A spiral lifting blade 301 is fixedly connected to the first rotating shaft 3. A first driving device 4 is fixedly connected to the upper surface of the mixing tank 1 and to the upper end of the first limiting tube 104. A first driving motor 401 is fixedly arranged on one side inside the first driving device 4. A third conical tooth 402 is fixedly connected to the output shaft of the first driving motor 401. A rotating column 202 is fixedly connected to the middle of the upper ends of the four L-shaped dispersing tubes 201. The upper end of the rotating column 202 extends into the first driving device 4 and is fixedly connected to... The first bevel gear 203 and the upper end of the first rotating shaft 3 pass through the middle of the rotating column 202 and extend out of the upper end of the rotating column 202. The upper end of the first rotating shaft 3 is fixedly connected to the second bevel gear 302 inside the first driving device 4. The second bevel gear 302 and the first bevel gear 203 are respectively meshed with the teeth at the upper and lower ends of the third bevel gear 402. The first driving device 4 synchronously drives the rotating column 202 and the first rotating shaft 3 to rotate in a coaxial reverse direction. When the first rotating shaft 3 rotates, it drives the spiral lifting blade 301 to rotate. When the spiral lifting blade 301 rotates, it lifts the raw material at the lower end of the mixing tank 1 through the lifting cylinder 2 and disperses it outward from the four L-shaped dispersion tubes 201. The raw material circulates into the lifting cylinder 2 and the mixing tank 1. When the rotating column 202 rotates, it synchronously drives the four L-shaped dispersion tubes 201 and the lifting cylinder 2 to rotate. The rotation of the four L-shaped dispersion tubes 201 initially disperses and mixes the raw material evenly.

[0024] Please see Figure 2 and Figure 4 Four second limiting tubes 105 are fixedly connected in a ring array on the upper surface of the mixing tank 1. A second rotating shaft 5 is rotatably installed inside the second limiting tube 105. The lower end of the second rotating shaft 5 extends out of the lower end of the second limiting tube 105 and is fixedly connected to a dispersing disc 501. A second driving device 6 is fixedly connected to the upper surface of the mixing tank 1 and to the upper end of each of the four second limiting tubes 105. A second driving motor 601 is fixedly installed inside the second driving device 6. The upper end of the second rotating shaft 5 passes through the middle of the second limiting tube 105 and extends into the second driving device 6 and is fixedly connected to the output shaft of the second driving motor 601. The second driving motor 601 drives the dispersing disc 501 to rotate at high speed through the second rotating shaft 5, so that the raw material is fully dispersed and mixed by the four dispersing discs 501 when it flows downward on the inner wall of the mixing tank 1 and the outer wall of the lifting cylinder.

[0025] Please see Figure 2A feed pipe 101 is fixedly connected to the upper end of one side of the mixing tank 1, and a discharge pipe 102 is fixedly connected to the middle of the lower end of the mixing tank 1. A discharge valve 103 is fixedly connected to the discharge pipe 102.

[0026] Working Principle: During operation, the denitrification catalyst raw material is fed into the mixing tank 1 through the feed pipe 101, and the first drive motor 401 and the second drive motor 601 are started. The first drive motor 401, through the third conical tooth 402, simultaneously meshes with the first conical gear 203 and the second conical tooth 302, driving the rotating column 202 and the first rotating shaft 3 to rotate synchronously in opposite directions. The rotating column 202 drives the lifting cylinder 2 and the four L-shaped dispersion tubes 201 to revolve, while the first rotating shaft 3 drives the spiral lifting blades 301 to rotate in the opposite direction, lifting the raw material deposited at the bottom of the mixing tank 1 upwards and evenly distributing it outwards through the L-shaped dispersion tubes 201. Simultaneously, the four second drive motors 601 drive the dispersion discs 501 to rotate at high speed through the second rotating shafts 5, performing secondary crushing and dispersion on the falling raw material. Under the action of gravity, the raw material falls along the annular space between the inner wall of the mixing tank 1 and the outer wall of the lifting cylinder 2, forming a circulating flow. Through the multiple actions of spiral lifting, centrifugal dispersion, and high-speed stirring, thorough mixing is achieved. After mixing is complete, open the discharge valve 103 and discharge the finished product through the discharge pipe 102.

[0027] It will be apparent to those skilled in the art that this invention is not limited to the details of the exemplary embodiments described above, and that it can be implemented in other specific forms without departing from the spirit or essential characteristics of this invention. Therefore, the embodiments should be considered illustrative and non-limiting in all respects, and the scope of this invention is defined by the appended claims rather than the foregoing description. Thus, it is intended that all variations falling within the meaning and scope of equivalents of the claims be included within this invention. No reference numerals in the claims should be construed as limiting the scope of the claims.

Claims

1. A mixing device for preparing a flue gas denitrification catalyst, comprising a mixing tank (1), characterized in that: The mixing tank (1) is fixedly connected to the middle of the upper part of the interior. A lifting cylinder (2) is rotatably arranged at the lower end of the first limiting tube (104). Four L-shaped dispersing tubes (201) are fixedly connected to the upper end of the lifting cylinder (2) in a ring array. A first rotating shaft (3) is rotatably connected to the middle of the interior of the lifting cylinder (2). The lower end of the first rotating shaft (3) extends out of the lower end of the lifting cylinder (2). A spiral lifting blade (301) is fixedly connected to the first rotating shaft (3). Four second limiting tubes (105) are fixedly connected to the upper end of the interior of the mixing tank (1) in a ring array. A second rotating shaft (5) is rotatably arranged inside the second limiting tube (105). The lower end of the second rotating shaft (5) extends out of the lower end of the second limiting tube (105) and is fixedly connected to a dispersing disc (501).

2. The flue gas denitrification catalyst preparation and mixing device according to claim 1, characterized in that: A feed pipe (101) is fixedly connected to the upper end of one side of the mixing tank (1), and a discharge pipe (102) is fixedly connected to the middle of the lower end of the mixing tank (1). A discharge valve (103) is fixedly connected to the discharge pipe (102).

3. The flue gas denitrification catalyst preparation and mixing device according to claim 1, characterized in that: The mixing tank (1) is fixedly connected to the upper end of the first limiting tube (104) with a first driving device (4). The first driving device (4) is fixedly provided with a first driving motor (401) on one side inside. The output shaft of the first driving motor (401) is fixedly connected with a third bevel tooth (402).

4. The flue gas denitrification catalyst preparation and mixing device according to claim 3, characterized in that: The upper middle part of the four L-shaped dispersion tubes (201) is fixedly connected to a rotating column (202). The upper end of the rotating column (202) extends into the first driving device (4) and is fixedly connected to a first bevel gear (203). The upper end of the first rotating shaft (3) passes through the middle part of the rotating column (202) and extends out of the upper end of the rotating column (202). The upper end of the first rotating shaft (3) is fixedly connected to a second bevel gear (302) inside the first driving device (4).

5. The flue gas denitrification catalyst preparation and mixing device according to claim 4, characterized in that: The second conical tooth (302) and the first conical gear (203) are respectively engaged with the upper and lower ends of the third conical tooth (402).

6. The flue gas denitrification catalyst preparation and mixing device according to claim 1, characterized in that: The mixing tank (1) is fixedly connected to a second drive device (6) on the upper surface and at the upper ends of the four second limit tubes (105). A second drive motor (601) is fixedly installed inside the second drive device (6).

7. The flue gas denitrification catalyst preparation and mixing device according to claim 6, characterized in that: The upper end of the second rotating shaft (5) extends through the middle of the second limiting tube (105) into the interior of the second driving device (6) and is fixedly connected to the output shaft of the second driving motor (601).

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