Catalyst drying apparatus

Abstract

A kind of catalyst drying device, including drying tank body, the lower part of drying tank body is conical structure, drying tank body upper portion is equipped with gas outlet and the feed inlet with cover plate, bottom is equipped with installation port, the inside of drying tank body lower portion is equipped with inner sleeve, the diameter of upper portion of inner sleeve is greater than the diameter of lower portion, the lower end of inner sleeve is communicated with the discharge pipe that is worn out installation port;Discharge pipe outer wall is sealedly connected with the inner wall of installation port, the outer wall of inner sleeve and the inner wall of corresponding drying tank body form gas distribution chamber;Inner sleeve is provided with the gas outlet group that is communicated with drying tank body and gas distribution chamber, and the lower part of drying tank body is equipped with at least one gas inlet pipe that is communicated with gas distribution chamber.The utility model discloses by the inner sleeve is designed as the horn shape or conical structure of big down small, and along its length direction sets up multiple gas outlet groups, realizes the fundamental optimization of air inlet mode, and can innovate the traditional bottom single air inlet to the multiple point, even air inlet along the lateral direction of inner sleeve.

Description

Technical Field

[0001] This utility model relates to the field of catalyst drying technology, specifically a catalyst drying device. Background Technology

[0002] Currently, the equipment and machinery used in the drying process during catalyst loading play a crucial role in improving catalyst product quality and increasing production efficiency. In catalyst applications, the drying step during loading is an indispensable process. However, existing drying devices for granular chemical engineering catalysts often fail to achieve efficient drying, resulting in poor catalyst drying performance.

[0003] Currently, the widely used catalyst drying equipment typically uses hot nitrogen gas introduced from the bottom for drying, but this method has the following drawbacks: First, introducing hot nitrogen from the bottom may cause uneven heating of the catalyst particles, with some areas being too hot and others too cold. This not only affects the drying efficiency but may also cause changes in the properties of the catalyst, thus affecting its catalytic performance. Secondly, the traditional bottom-inlet method easily causes mutual compression and friction between catalyst particles. This can not only lead to particle breakage, increasing the difficulty of subsequent processing, but also introduce impurities and reduce the purity of the catalyst. Furthermore, this equipment is only suitable for inlet methods using dry granular catalysts; it is prone to clogging the pipes when using powdered catalysts. Utility Model Content

[0004] To address the technical problems existing in the background art, this utility model provides a catalyst drying device.

[0005] The technical solution of this utility model is as follows: A catalyst drying device includes a drying tank, the lower part of which is a conical structure. The upper part of the drying tank is provided with an air outlet and a feed inlet with a cover plate. The bottom is provided with an installation port. The lower part of the inner side of the drying tank is provided with an inner sleeve. The upper diameter of the inner sleeve is larger than the lower diameter. The lower port of the inner sleeve is connected to a discharge pipe that passes through the installation port. The lower part of the discharge pipe is provided with a switch valve. The upper outer edge of the inner sleeve is sealed to the inner wall of the drying tank, the outer wall of the discharge pipe is sealed to the inner wall of the installation port, and the outer wall of the inner sleeve and the corresponding inner wall of the drying tank form a gas distribution chamber. The inner sleeve has an air outlet group that connects the drying tank and the gas distribution chamber, and the lower part of the drying tank has at least one air inlet pipe that connects to the gas distribution chamber.

[0006] To facilitate increasing the number of air outlets in the air outlet group and significantly improve the air intake rate, the inner sleeve has a trumpet-shaped or conical structure.

[0007] The specific structure of the vent group is that multiple vent groups are arranged along the length of the inner sleeve, and each vent group includes multiple vents arranged along the circumferential direction of the inner sleeve.

[0008] To achieve multi-point air intake and ensure uniform air intake, the number of air outlets in multiple sets of air outlets increases from bottom to top, so that several air outlets are evenly distributed on the entire inner jacket sleeve. This allows the hot nitrogen gas introduced through the air inlet pipe to be discharged into the tank through the air outlets on the inner jacket sleeve, thereby achieving uniform drying of the catalyst particles or powder placed in the tank.

[0009] If the hot nitrogen gas introduced through the inlet pipe passes through the gas distribution chamber and is then discharged into the tank through multiple outlet holes, uneven gas distribution may occur, and dead zones may appear at the corners of the gas distribution chamber, affecting gas flow. Therefore, multiple annular air distribution pipes with different outer diameters and located in the gas distribution chamber are fitted on the outer side of the inner sleeve. The multiple annular air distribution pipes are respectively set to correspond to the outlet hole group, and the annular air distribution pipes on the same horizontal plane are respectively connected to the corresponding outlet holes through connecting pipes. Multiple annular air distribution ducts are connected to the air inlet pipe through an arc-shaped air distribution duct located in the gas distribution chamber.

[0010] Furthermore, the arc-shaped air distribution duct connects to the same side of multiple annular air distribution ducts from bottom to top.

[0011] Preferably, there are two symmetrically arranged air intake pipes and two symmetrically arranged arc-shaped air distribution pipes, with each arc-shaped air distribution pipe connected to its corresponding air intake pipe.

[0012] The air intake pipe is positioned such that it is inclined upwards from bottom to top, with its upper end located in the gas distribution chamber and connected to the middle of the arc-shaped air distribution duct.

[0013] To facilitate observation of whether there is any catalyst residue, an observation window is provided at the bottom of the discharge pipe, located below the switch valve.

[0014] The beneficial effects of this utility model are as follows: By designing the inner sleeve into a trumpet-shaped or conical structure that is larger at the top and smaller at the bottom, and setting multiple sets of air outlets along its length, the air intake method is fundamentally optimized, which can transform the traditional single bottom air intake into multi-point and uniform air intake along the side of the inner sleeve. The number of vent holes in the vent group is arranged in an increasing manner from bottom to top, which ensures that the vent holes are evenly distributed on the conical surface. This greatly increases the contact area and efficiency between hot nitrogen and the material, which not only significantly improves the air intake rate and drying efficiency, but also effectively eliminates the drying dead corners in the tank, allowing the catalyst particles or powder to be heated evenly, thereby greatly improving the drying effect and product consistency. To address the core issue of uniform gas distribution, the device innovatively incorporates multi-stage annular and arc-shaped air distribution pipes within the gas distribution chamber, forming a highly efficient gas distribution system. Hot nitrogen enters through the inlet pipe, is diverted by the arc-shaped air distribution pipe to annular air distribution pipes at different heights, and is then precisely delivered to the corresponding outlet through connecting pipes. This effectively prevents the formation of "dead zones" in the corners of the distribution chamber, ensuring the uniformity and stability of the airflow distribution. The preferred symmetrical arrangement of two air inlets and an arc-shaped air distribution pipe further balances the airflow pressure within the system, allowing hot nitrogen to escape evenly from the entire inner jacket surface. This significantly improves the utilization efficiency of hot nitrogen, reduces energy consumption, and particularly enhances the drying effect on the catalyst at the conical bottom. Attached Figure Description

[0015] In the attached diagram: Figure 1 This is a structural diagram; Figure 2 This is a schematic diagram of the cross-sectional structure; Figure 3 This is a schematic diagram of the structure of the inner sleeve, the annular air distribution duct, the arc-shaped air distribution duct, and the air inlet pipe. Figure 4 for Figure 3 The front view; Figure 5 for Figure 3 Top view; Figure 6 for Figure 3 A bottom view; The components represented by the various reference numerals in the diagram are: 1. Drying tank body; 101. Air outlet; 102. Feed inlet; 103. Mounting port; 2. Inner sleeve; 201. Air outlet hole; 202. Lower port; 3. Discharge pipe; 4. Switch valve; 5. Gas distribution chamber; 6. Air inlet pipe; 7. Annular air distribution pipe; 8. Connecting pipe; 9. Arc-shaped air distribution pipe; 10. Observation window. Detailed Implementation

[0016] See Figure 1 and Figure 2 As shown, a catalyst drying device includes a drying tank 1. The lower part of the drying tank 1 is an inverted conical structure. The upper part of the drying tank 1 is provided with an air outlet 101 and a feed inlet 102 with a cover plate. The bottom is provided with an installation port 103. The lower part of the inner side of the drying tank 1 is provided with an inner sleeve 2. The upper diameter of the inner sleeve 2 is larger than the lower diameter. The lower port 202 of the inner sleeve 2 is connected to a discharge pipe 3 that passes through the installation port 103. The lower part of the discharge pipe 3 is provided with a switch valve 4, which is used to control the discharge.

[0017] The upper outer end of the inner sleeve 2 is sealed to the inner wall of the drying tank 1, the outer wall of the discharge pipe 3 is sealed to the inner wall of the installation port 103, and the outer wall of the inner sleeve 2 and the corresponding inner wall of the drying tank 1 form a gas distribution chamber 5.

[0018] The inner sleeve 2 has an air outlet group that connects the drying tank 1 and the gas distribution chamber 5, and the lower part of the drying tank 1 has at least one air inlet pipe 6 that connects to the gas distribution chamber 5.

[0019] See Figure 3 and Figure 4 As shown, to facilitate increasing the number of vent holes 201 in the vent hole group and significantly improve the air intake rate, the inner sleeve 2 has a trumpet-shaped or conical structure. In this embodiment, the inner sleeve 2 is trumpet-shaped, and the arc surface of the trumpet-shaped structure is more conducive to hot nitrogen. The upper end of the trumpet-shaped opening has a larger circumferential area, providing ample space for arranging a larger number and denser distribution of vent holes 201, allowing hot nitrogen to enter the drying tank body at a larger flow rate and faster. The sidewalls of the trumpet-shaped structure are concave curved surfaces, which can better guide the hot nitrogen airflow upward and diffuse towards the central area of ​​the drying tank 1. This avoids the hot airflow rising only in a straight line along the tank wall, prompting the gas to penetrate the catalyst material layer in the center of the tank more fully, thereby more effectively eliminating the drying dead zone in the central area of ​​the tank and achieving more uniform drying. Moreover, during the unloading stage, the smooth inner wall of the trumpet shape provides a smoother flow path for catalyst particles or powder. Its gradually converging structure is conducive to the material flowing towards the discharge port under the action of gravity.

[0020] See Figure 3 , Figure 4 and Figure 5 As shown, multiple sets of vent holes are arranged along the length of the inner jacket sleeve 2. Each set of vent holes includes multiple vent holes 201 arranged along the circumferential direction of the inner jacket sleeve 2. To achieve multi-point air intake and ensure the uniformity of air intake, the number of vent holes 201 in the multiple sets of vent holes increases from bottom to top, so that several vent holes 201 are evenly distributed on the entire inner jacket sleeve 2. This allows the hot nitrogen gas introduced through the air intake pipe 6 to be discharged into the tank through the vent holes 201 on the inner jacket sleeve 2, thereby achieving uniform drying of the catalyst particles or powder placed in the tank.

[0021] See Figure 3 and Figure 6As shown, if the hot nitrogen gas introduced through the inlet pipe 6 passes through the gas distribution chamber 5 and is then discharged into the tank through multiple outlet holes 201, uneven gas distribution may occur, and dead zones may appear at the corners of the gas distribution chamber 5, affecting gas flow. Therefore, multiple annular air distribution pipes 7 with different outer diameters are sleeved on the outer side of the inner sleeve 2 and located in the gas distribution chamber 5. The multiple annular air distribution pipes 7 are respectively set to correspond to the outlet hole group. The annular air distribution pipes 7 on the same horizontal plane are respectively connected to the corresponding outlet holes 201 through connecting pipes 8.

[0022] Multiple annular air distribution ducts 7 are connected to the air inlet pipe 6 via arc-shaped air distribution ducts 9 located within the gas distribution chamber 5. The arc-shaped air distribution ducts 9 are connected to the same side of the multiple annular air distribution ducts 7 from bottom to top.

[0023] In this embodiment, two air intake pipes 6 are symmetrically arranged, therefore, two arc-shaped air distribution pipes 9 are symmetrically arranged, and the arc-shaped air distribution pipes 9 are respectively connected to the corresponding air intake pipes 6. The air intake pipes 6 are arranged inclined upward from bottom to top, and the upper end of the air intake pipes 6 is located in the gas distribution chamber 5. The upper end of the air intake pipes 6 is connected to the middle part of the arc-shaped air distribution pipes 9.

[0024] To facilitate observation of catalyst residue, an observation window 10 is provided at the lower part of the discharge pipe 3, located below the switch valve 4. By adding the observation window 10 at the lower part of the discharge pipe 3 and below the switch valve 4, the operability and controllability of the equipment are increased. Operators can directly observe the catalyst discharge and detect any material residue, facilitating timely maintenance and cleaning, ensuring production continuity and safety, and reducing operational difficulty and maintenance costs.

Claims

1. A catalyst drying apparatus, comprising a drying tank (1), the lower part of which has a conical structure, characterized in that, The drying tank (1) is provided with an air outlet (101) and a feed inlet (102) with a cover plate at the top, and an installation port (103) at the bottom. The inner side of the drying tank (1) is provided with an inner sleeve (2). The upper diameter of the inner sleeve (2) is larger than the lower diameter. The lower port (202) of the inner sleeve (2) is connected to a discharge pipe (3) that passes through the installation port (103). The upper outer end of the inner sleeve (2) is sealed to the inner wall of the drying tank (1), the outer wall of the discharge pipe (3) is sealed to the inner wall of the installation port (103), and the outer wall of the inner sleeve (2) and the inner wall of the corresponding drying tank (1) form a gas distribution chamber (5). The inner sleeve (2) is provided with an air outlet group that connects the drying tank (1) and the gas distribution chamber (5), and the lower part of the drying tank (1) is provided with at least one air inlet pipe (6) that connects to the gas distribution chamber (5).

2. The catalyst drying apparatus according to claim 1, characterized in that, The inner sleeve (2) has a trumpet-shaped or conical structure.

3. The catalyst drying apparatus according to claim 2, characterized in that, The air outlet group is provided in multiple groups along the length direction of the inner sleeve (2), and each group of air outlets includes multiple air outlets (201) arranged along the circumferential direction of the inner sleeve (2).

4. The catalyst drying apparatus according to claim 3, characterized in that, The number of air outlets (201) in the multiple sets of air outlet groups increases from bottom to top.

5. A catalyst drying apparatus according to claim 1, characterized in that, The inner sleeve (2) is fitted with multiple annular air distribution pipes (7) with different outer diameters and located in the gas distribution chamber (5). The multiple annular air distribution pipes (7) are respectively set with corresponding air outlet groups. The annular air distribution pipes (7) on the same horizontal plane are respectively connected to the corresponding air outlets (201) through connecting pipes (8). Multiple annular air distribution pipes (7) are connected to the air inlet pipe (6) through an arc-shaped air distribution pipe (9) located in the gas distribution chamber (5).

6. A catalyst drying apparatus according to claim 5, characterized in that, The arc-shaped air distribution duct (9) is connected to the same side of multiple annular air distribution ducts (7) from bottom to top.

7. A catalyst drying apparatus according to claim 6, characterized in that, There are two symmetrically arranged air intake pipes (6) and two symmetrically arranged arc-shaped air distribution pipes (9), which are respectively connected to the corresponding air intake pipes (6).

8. A catalyst drying apparatus according to claim 7, characterized in that, The air intake pipe (6) is inclined upward from bottom to top. The upper end of the air intake pipe (6) is located in the gas distribution chamber (5). The upper end of the air intake pipe (6) is connected to the middle part of the arc-shaped air distribution pipe (9).

9. A catalyst drying apparatus according to claim 1, characterized in that, The discharge pipe (3) is provided with an observation window (10) at the bottom, which is located below the switch valve (4).

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