A catalyst carrier powder conveying apparatus

Abstract

The utility model relates to powder conveying technical field especially is concerned on a kind of catalyst carrier powder conveying equipment;Including the hopper of cone angle ≥70 °, the roughness Ra of the inner wall surface of hopper ≤0.4 μm, pneumatic flow-aiding ring is set in the height ≤1 / 3 cone height of hopper lower part and the height from discharge port, and the annular air cavity of pneumatic flow-aiding ring is connected outside gas source;Pneumatic flow-aiding ring circumferentially distributes first nozzle group and second nozzle group, and the jet direction of first nozzle group is inclined upwards along hopper inner wall, for fluidizing powder layer in advance;The jet direction of second nozzle group is inclined downwards along hopper inner wall, for promoting powder slip.

Description

Technical Field

[0001] This utility model relates to the field of powder conveying technology, and in particular to a catalyst carrier powder conveying device. Background Technology

[0002] Catalyst carrier powder conveying equipment is a key device in chemical production used to transfer catalyst carrier powders such as alumina, diatomaceous earth, and activated carbon. It typically includes a silo, a conical hopper, and a discharge valve. This type of equipment must meet the requirements of high purity and low residue conveying, especially for fine, hygroscopic, and poorly flowing carrier powders, such as alumina powder with a particle size <200 mesh. Its discharge efficiency directly affects the continuity of catalyst production and product consistency.

[0003] Traditional powder conveying equipment has significant drawbacks when handling catalyst carrier powder: insufficient downward force of the powder in the hopper leads to a large amount of powder adhering to the inner wall of the hopper due to electrostatic adsorption and mechanical meshing, with a residual rate as high as 5%-15%. Existing anti-clogging measures, such as mechanical vibration or agitation, can damage the powder structure, for example, the crushing of activated carbon powder can introduce impurities. In addition, due to the small discharge port, the powder is prone to blockage above the discharge port, forming bridging and rat hole problems at the bottom. Especially in the lower part near the discharge port, which occupies 1 / 3 of the cone height, the powder is compressed to form a dense accumulation layer, which is difficult to break down effectively, resulting in frequent blockages, discharge interruptions, and purity contamination.

[0004] Therefore, this application provides a catalyst support powder conveying device to solve the problems mentioned in the background art. Utility Model Content

[0005] The purpose of this invention is to provide a catalyst carrier powder conveying device that solves the problems of high hopper residue rate, frequent bridging and blockage, and dense accumulation of rat holes at the bottom of the hopper in existing powder conveying devices.

[0006] To solve the above technical problems, this utility model provides a catalyst carrier powder conveying device, including a hopper with a cone angle ≥70°, the inner wall surface roughness Ra≤0.4μm, and a pneumatic flow aid ring is provided at the lower part of the hopper and at a height ≤1 / 3 of the cone height from the discharge port. The annular air chamber of the pneumatic flow aid ring is connected to an external air source.

[0007] The pneumatic flow aid ring has a first nozzle group and a second nozzle group evenly distributed around its circumference. The jet direction of the first nozzle group is inclined upward along the inner wall of the hopper to fluidize the powder layer in advance; the jet direction of the second nozzle group is inclined downward along the inner wall of the hopper to push the powder to slide.

[0008] A further improvement of this utility model is that a horizontal annular groove is opened at the lower 1 / 3 cone height of the inner wall of the hopper, the edge of the annular groove is rounded, a pneumatic flow aid ring is embedded in the annular groove, an air inlet pipe is provided extending outward on the pneumatic flow aid ring, the air inlet pipe passes through the side wall of the hopper, and is connected to an external air source through a quick connector.

[0009] A further improvement of the present invention is that the first nozzle group includes a plurality of first nozzles circumferentially arranged on the top of the pneumatic flow aid ring, the first nozzles are connected to the annular air chamber, and the blowing direction of the first nozzles is upward along the inner wall of the hopper.

[0010] A further improvement of the present invention is that the second nozzle group includes several second nozzles circumferentially arranged at the bottom of the pneumatic flow aid ring, the second nozzles are connected to the annular air chamber, and the blowing direction of the second nozzles is downward along the inner wall of the hopper.

[0011] A further improvement of this utility model is that the first nozzle and the corresponding second nozzle are arranged coaxially, and the internal air passages of the first nozzle and the second nozzle are both tapered air passages.

[0012] A further improvement of this utility model is that the ratio of the inner diameter of the air passages of the first nozzle group to that of the second nozzle group is 1:1.2~1.8, and the coverage area of ​​the downward blowing airflow accounts for 70%~90% of the lower cross section of the hopper.

[0013] A further improvement of this utility model is that the hopper has a split structure, including two hopper shells split along the axial direction, and the connecting blocks of the hopper shells are fastened by bolts.

[0014] A further improvement of this utility model is that an electrolytic polishing layer and a nano-coating are provided on the inner wall of the hopper.

[0015] By adopting the above technical solution, this utility model has the following beneficial effects:

[0016] 1. The present invention provides a catalyst carrier powder conveying device. The device significantly reduces the adsorption force and frictional resistance between the powder and the wall surface by setting a hopper with a cone angle ≥70° and a mirror-polished inner wall with Ra≤0.4μm. This allows the fine powder of the catalyst carrier to slide almost completely under the action of gravity, thus completely eliminating the 5%-15% residual pollution problem caused by the small inclination angle and high roughness of traditional hoppers.

[0017] 2. The present invention provides a catalyst carrier powder conveying device. The device uses a pneumatic flow-aiding ring located at the lower 1 / 3 cone height of the hopper. The first nozzle group tilts upward to spray air to loosen the material layer, and the second nozzle group tilts downward to spray air to assist the sliding. Simultaneously, it breaks the upper powder bridge and the lower dense layer of rat holes, so as to achieve continuous unblocking and overcome the frequent clogging of powder.

[0018] 3. The present invention provides a catalyst carrier powder conveying device. The device achieves quick disassembly, maintenance or replacement of the pneumatic flow aid ring through a split hopper structure and embedded ring groove design, avoiding equipment downtime losses caused by the difficulty of maintenance of traditional integrated hoppers.

[0019] 4. The present invention provides a catalyst carrier powder conveying device. The device sets a first nozzle and a corresponding second nozzle to be coaxial, and the internal air passages of the first nozzle and the second nozzle are both tapered air passages. The air passage inner diameter ratio of 1:1.2~1.8 is optimized so that the downward airflow covers 70%~90% of the lower cross section of the hopper, forming a continuous air cushion layer to wrap the powder particles, which greatly reduces the wear of powder flow and extends the service life of the equipment.

[0020] 5. The present invention provides a catalyst carrier powder conveying device. This device integrates a large-angle mirror-shaped hopper shell with an inclination angle of ≥70°, a dual-airflow coordinated pneumatic flow aid ring, and a separate maintainable structure. Under the premise of eliminating mechanical vibration that could damage the purity of the powder, it achieves efficient conveying with zero pollution and zero blockage, meeting the stringent requirements of catalyst carrier powder for production continuity and consistency. Attached Figure Description

[0021] To more clearly illustrate the specific embodiments of this utility model or the technical solutions in the prior art, the drawings used in the description of the specific embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of this utility model. For those skilled in the art, other drawings can be obtained from these drawings without creative effort.

[0022] Figure 1 A schematic diagram of an overall catalyst carrier powder conveying device;

[0023] Figure 2 A schematic diagram of an overall catalyst carrier powder conveying device;

[0024] Figure 3 This is a schematic diagram of the structure of the hopper shell and the pneumatic flow aid ring of this utility model;

[0025] Figure 4 This is a side view of the hopper shell and pneumatic flow aid ring of this utility model;

[0026] Figure 5 This is a front view of the hopper shell and pneumatic flow aid ring of this utility model;

[0027] Figure 6 for Figure 5 An enlarged schematic diagram of part A in the middle;

[0028] Figure 7This is a schematic diagram of the structure of the pneumatic flow aid ring of this utility model;

[0029] Figure 8 This is a cross-sectional view of the pneumatic flow aid ring of this utility model.

[0030] Reference numerals: 1. Hopper; 11. Hopper shell; 12. Connecting block; 13. Discharge port; 14. Annular groove; 2. Pneumatic flow aid ring; 21. Annular air chamber; 3. Air inlet pipe; 4. Quick connector; 5. First nozzle group; 51. First nozzle; 6. Second nozzle group; 61. Second nozzle; 7. Air passage. Detailed Implementation

[0031] The technical solution of this utility model will now be clearly and completely described with reference to the accompanying drawings. Obviously, the described embodiments are only some, not all, of the embodiments of this utility model. Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this utility model.

[0032] In the description of this utility model, it should be noted that the terms "center," "upper," "lower," "left," "right," "vertical," "horizontal," "inner," and "outer," etc., indicating the orientation or positional relationship, are based on the orientation or positional relationship shown in the accompanying drawings and are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this utility model. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0033] In the description of this utility model, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "joining" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; 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; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.

[0034] The present invention will be further explained below with reference to specific embodiments.

[0035] like Figures 1-8As shown, this embodiment provides a catalyst carrier powder conveying device, comprising a hopper 1 with a cone angle ≥70°. It adopts a split design, consisting of two axially split hopper shells 11 fastened together by connecting blocks 12 and bolts, significantly simplifying the maintenance process of the pneumatic flow aid ring 2. The inner wall of the hopper 1 is treated with electrolytic polishing and a nano-coating, resulting in a surface roughness Ra≤0.4μm, significantly weakening the powder adsorption force. An annular groove 14 is formed at the lower part of the hopper 1 at a distance ≤1 / 3 of the cone height from the discharge port 13. Its rounded edge design avoids stress concentration leading to wear cracks. The pneumatic flow aid ring 2 embedded in the groove penetrates the side wall of the hopper 1 through an air inlet pipe 3, and is connected to a dry and clean air source (compressed air or nitrogen) via a quick connector 4, enabling rapid airflow and disconnection. This structure, through the synergy of the split, detachable hopper 1, the smooth inner wall, and the embedded pneumatic flow aid ring 2, ensures the equipment's sealing while completely solving the maintenance difficulties and persistent inner wall residue problems of traditional integrated hoppers.

[0036] like Figures 5-8 As shown, in this embodiment, the pneumatic flow aid ring 2 is circumferentially distributed with a first nozzle group 5 and a second nozzle group 6. The first nozzle group 5 includes several first nozzles 51 circumferentially arranged at the top of the pneumatic flow aid ring 2. The first nozzles 51 are connected to the annular air chamber 21, and the blowing direction of the first nozzles 51 is upward along the inner wall of the hopper 1, used to pre-fluidize the powder layer. The second nozzle group 6 includes several second nozzles 61 circumferentially arranged at the bottom of the pneumatic flow aid ring 2. The second nozzles 61 are connected to the annular air chamber 21, and the blowing direction of the second nozzles 61 is downward along the inner wall of the hopper 1, used to push the powder to slide. The first nozzles 51 and the corresponding second nozzles 61 are coaxially arranged, and the internal air passages 7 of the first nozzles 51 and the second nozzles 61 are both tapered air passages 7. The inner diameter ratio of the air passages 7 of the first nozzle group 5 and the second nozzle group 6 is 1:1.2~1.8, and the downward airflow covers 70%~90% of the lower cross-section of the hopper 1. The gas flow path is external air source - quick connector 4 - air inlet pipe 3 - annular air chamber 21, and then it is sprayed out in the designated direction through the first nozzle 51 and the second nozzle 61 respectively. This design relies on the coaxial tapered air channel 7 and precise flow ratio to make the upward loosening airflow and the downward boosting airflow work together seamlessly to form a dynamic air cushion at the powder-wall interface, and simultaneously eliminate bridging, rat holes and flow wear.

[0037] This utility model also provides the operating principle of a catalyst carrier powder conveying device:

[0038] After the powder enters the polishing hopper 1 from the hopper, it slides naturally under the action of gravity. When the powder flows to the lower 1 / 3 area of ​​the hopper 1, the first nozzle 51 of the pneumatic flow aid ring 2 sprays an upward airflow to fluidize the powder layer in advance and break the bridging. At the same time, the second nozzle 61 sprays downward along the wall at a higher flow rate to form an air cushion booster layer. Under the synergistic effect of the two airflows, the powder slides smoothly to the discharge port 13 in the air cushion. The split hopper 1 design makes it easy to disassemble and maintain the flow aid ring regularly, while the nano-polished inner wall ensures that the powder is almost completely discharged without residue, ultimately achieving high-purity, zero-clogging continuous conveying.

[0039] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of this utility model, and are not intended to limit it. Although the utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some or all of the technical features therein. Such modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of this utility model.

Claims

1. A catalyst carrier powder conveying apparatus characterized by, The hopper (1) includes a cone angle ≥ 70°, the inner wall surface roughness Ra ≤ 0.4 μm, and a pneumatic flow aid ring (2) is set at the lower part of the hopper (1) at a height ≤ 1 / 3 of the cone height from the discharge port (13). The annular air chamber (21) of the pneumatic flow aid ring (2) is connected to an external air source. The pneumatic flow aid ring (2) is circumferentially distributed with a first nozzle group (5) and a second nozzle group (6). The jet direction of the first nozzle group (5) is inclined upward along the inner wall of the hopper (1) to fluidize the powder layer in advance. The jet direction of the second nozzle group (6) is inclined downward along the inner wall of the hopper (1) to push the powder to slide.

2. A catalyst carrier powder delivery apparatus according to claim 1, wherein, A horizontal annular groove (14) is opened at the lower 1 / 3 cone height of the inner wall of the hopper (1). The edge of the annular groove (14) is rounded. A pneumatic flow aid ring (2) is embedded in the annular groove (14). An air inlet pipe (3) is set on the pneumatic flow aid ring (2) extending outward. The air inlet pipe (3) passes through the side wall of the hopper (1) and is connected to an external air source through a quick connector (4).

3. A catalyst carrier powder delivery apparatus according to claim 1, wherein, The first nozzle group (5) includes several first nozzles (51) arranged circumferentially on the top of the pneumatic flow aid ring (2). The first nozzles (51) are connected to the annular air chamber (21), and the blowing direction of the first nozzles (51) is upward along the inner wall of the hopper (1).

4. A catalyst carrier powder delivery apparatus according to claim 3, wherein, The second nozzle group (6) includes several second nozzles (61) arranged circumferentially at the bottom of the pneumatic flow aid ring (2). The second nozzles (61) are connected to the annular air chamber (21), and the blowing direction of the second nozzles (61) is downward along the inner wall of the hopper (1).

5. The catalyst carrier powder conveying device according to claim 4, characterized in that, The first nozzle (51) and the corresponding second nozzle (61) are arranged coaxially, and the internal air passages (7) of the first nozzle (51) and the second nozzle (61) are both tapered air passages (7).

6. The catalyst carrier powder conveying device according to claim 5, characterized in that, The ratio of the inner diameter of the air passage (7) of the first nozzle group (5) to that of the second nozzle group (6) is 1:1.2~1.8, and the area covered by the downward airflow accounts for 70%~90% of the lower cross section of the hopper (1).

7. The catalyst carrier powder conveying device according to claim 1, characterized in that, The hopper (1) is a split structure, including two hopper shells (11) split along the axial direction, and the connecting block (12) of the hopper shell (11) is fastened by bolts.

8. The catalyst carrier powder conveying device according to claim 1, characterized in that, The inner wall of the hopper (1) is provided with an electrolytic polishing layer and a nano coating.

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