A catalyst impregnation drying apparatus

Abstract

The utility model discloses a kind of catalyst impregnation drying equipment, it is related to catalyst preparation technical field.Its main technical scheme: including spraying device, the lower end of the spraying device is provided with spraying hole;The number of the spraying hole is provided with several, and the several spraying holes are evenly laid around the longitudinal axis of reaction cylinder body.In use process, impregnation liquid is sprayed downwards in annular uniform mode by the spraying hole in the lower end of spraying device, so that impregnation liquid covers the cross section of reaction cylinder body in symmetrical, balanced mode.On the one hand, to achieve the purpose of reducing the risk of local spraying dense or sparse caused by staggered arrangement, and then ensure that impregnation liquid is more symmetrical and balanced from center to edge distribution.On the other hand, by improving the uniformity of impregnation liquid distribution, to achieve the purpose of improving the uniformity of catalyst carrier particle adsorption active component.

Description

Technical Field

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

[0002] A catalyst is a substance that can accelerate the rate of a chemical reaction without being consumed or altered during the reaction. It makes the reaction more efficient by lowering the activation energy of the reaction. A catalyst can participate in the reaction at the beginning to form intermediate products, but after the reaction ends, it will return to its original state and be able to participate in the next round of reaction.

[0003] Impregnation is a common catalyst preparation method widely used in catalyst production, especially in the preparation of metal catalysts. In this method, a metal precursor solution is impregnated onto the surface of a support, thereby loading the active component (usually a metal or metal compound) onto the catalyst support. After impregnation, the catalyst needs to be dried using a drying device.

[0004] Existing patent CN219150150U discloses a catalyst impregnation and drying device, in which the small holes on the spraying device are arranged in multiple rows at a certain angle. This greatly reduces the uniformity of the impregnation liquid spraying. Utility Model Content

[0005] The purpose of this invention is to provide a catalyst impregnation and drying device that solves the problem that the small holes on the spray device of the existing catalyst impregnation and drying device are arranged in multiple rows at a certain angle, which greatly reduces the uniformity of the impregnation liquid spraying.

[0006] To solve the above-mentioned technical problems, the present invention adopts the following technical solution:

[0007] A catalyst impregnation and drying device includes a spraying device, the lower end of which is provided with spraying holes; the number of spraying holes is set to a plurality of them, and the plurality of spraying holes are evenly distributed around the longitudinal axis of the reaction cylinder.

[0008] A further technical solution is: the spraying device has a material channel; the material channel extends from the upper end of the spraying device to the lower end of the spraying device, and the material channel corresponds to the material inlet; wherein, the spray holes are evenly distributed around the material channel.

[0009] A further technical solution is that the distance between the spray hole and the longitudinal axis of the reaction cylinder is equal to the distance between the spray hole and the inner wall of the reaction cylinder.

[0010] A further technical solution is that the catalyst impregnation and drying equipment also includes pressure nozzles; the number of pressure nozzles is set to several, and the several pressure nozzles are evenly distributed on each of the spray holes.

[0011] A further technical solution is as follows: the catalyst impregnation and drying equipment further includes a guide plate; the guide plate is disposed on the inner wall of the reaction cylinder; the guide plate extends around the longitudinal axis of the reaction cylinder; the number of guide plates is set to a certain number; at least two guide plates are correspondingly disposed above and below the spraying device; wherein, the cross-sectional area of ​​the guide plate gradually increases along the longitudinal axis of the reaction cylinder towards the spraying device.

[0012] A further technical solution is that several of the aforementioned guide plates are evenly distributed on the front and rear walls of the reaction cylinder.

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

[0014] During operation, the impregnation solution is sprayed downwards in a uniform, ring-shaped manner through the spray holes at the lower end of the spray device, ensuring that the impregnation solution covers the cross-section of the reaction cylinder symmetrically and evenly. This aims to reduce the risk of localized dense or sparse spraying due to staggered arrangement, thereby ensuring a more symmetrical and even distribution of the impregnation solution from the center to the edge. Furthermore, by improving the uniformity of the impregnation solution distribution, it is hoped that the uniformity of adsorption of active components by the catalyst support particles will be improved. Attached Figure Description

[0015] Figure 1 This is a schematic diagram of the structure of a catalyst impregnation and drying device in this embodiment;

[0016] Figure 2 for Figure 1 Schematic diagram of the cross-sectional structure at point AA;

[0017] Figure 3 This is a schematic diagram of the structure of a spray device for a catalyst impregnation and drying equipment in this embodiment;

[0018] Figure 4 This is a schematic diagram of the structure of a guide plate for a catalyst impregnation and drying device in this embodiment.

[0019] The attached diagram shows the markings and corresponding component names:

[0020] 1-Spraying device; 2-Spraying hole; 3-Material channel; 4-Material inlet; 5-Reaction cylinder; 6-Pressure nozzle; 7-Guide plate; 8-Material outlet. Detailed Implementation

[0021] The present invention will be further described below with reference to the accompanying drawings.

[0022] Existing patent CN219150150U discloses a catalyst impregnation and drying device. This device includes: a feeding unit for feeding impregnation liquid into a reaction unit, a reaction unit for impregnating and drying the catalyst, and an auxiliary unit for providing impregnation and drying conditions. The feeding unit includes an impregnation liquid raw material tank, a delivery pipeline, and a spray device 1. One end of the delivery pipeline is sealed to the impregnation liquid raw material tank, and the other end is sealed to the spray device 1. The reaction unit includes a reaction cylinder 5 and a material inlet 4 and a material outlet 8 disposed on the reaction cylinder 5. The reaction cylinder 5 is configured to rotate and tumble. The auxiliary unit includes a circulating vacuum pump. The spray device 1 has multiple rows of small holes spaced at a certain angle, which significantly reduces the uniformity of the impregnation liquid spray. Therefore, Example 1 is provided: This embodiment provides a catalyst impregnation and drying device, such as... Figures 1-4 As shown, it includes a spraying device 1, and the lower end of the spraying device 1 is provided with a spraying hole 2; the number of spraying holes 2 is set to several, and the several spraying holes 2 are evenly distributed around the longitudinal axis of the reaction cylinder 5.

[0023] For example, during implementation, spray holes 2 are provided at the lower end of the spray device 1. Several spray holes 2 are provided, and these spray holes 2 are evenly distributed around the longitudinal axis of the reaction cylinder 5. That is, the several spray holes 2 are arranged at the same central angle intervals in the horizontal plane, forming a complete circular array.

[0024] During use, the impregnation solution is sprayed downwards in a uniform, annular manner through the spray holes 2 at the lower end of the spray device 1, ensuring that the impregnation solution covers the cross-section of the reaction cylinder 5 symmetrically and evenly. This aims to reduce the risk of localized dense or sparse spraying due to staggered arrangement, thereby ensuring a more symmetrical and even distribution of the impregnation solution from the center to the edge. Furthermore, by improving the uniformity of the impregnation solution distribution, it is hoped that the uniformity of adsorption of active components by the catalyst support particles will be improved.

[0025] To reduce the risk of material adhering to the spray device 1 when material is fed in from material inlet 4, Example 2: Based on Example 1 above, in this example, as... Figure 2 Combination Figure 3 As shown, the spray device 1 has a material channel 3; the material channel 3 extends from the upper end of the spray device 1 to the lower end of the spray device 1, and the material channel 3 corresponds to the material inlet 4; wherein, the spray holes 2 are evenly distributed around the material channel 3.

[0026] For example, during implementation, a material channel 3 is opened in the central area of ​​the upper end of the spray device 1. The material channel 3 extends from the upper end of the spray device 1 to the lower end of the spray device 1, and the material channel 3 is aligned with the material inlet 4 on the reaction cylinder 5, so that the material fed in through the material inlet 4 can fall into the lower end of the reaction cylinder 5 through the material channel 3.

[0027] During operation, after material is fed into the material inlet 4 at the top of the reaction cylinder 5, the material can fall into the lower part of the reaction cylinder 5 through the material channel 3 on the spray device 1. This effectively reduces the risk of material adhering to or accumulating on the upper surface of the spray device 1 due to collision, static electricity, or moisture. The aim is to reduce the risk of low mixing uniformity of the material due to adsorption or accumulation on the upper surface of the spray device 1, and to reduce the risk of equipment contamination and blockage.

[0028] The aforementioned spray holes 2 are evenly distributed around the material channel 3. In other words, the spray holes 2 are arranged in a ring array around the material channel 3, with the material channel 3 as the center. This is intended to ensure that the impregnating liquid is evenly sprayed onto the material area below, while effectively avoiding the central feeding path.

[0029] To further improve the uniformity of the impregnation solution spraying process, Example 3: Based on Example 2 above, in this example, as... Figure 1 As shown, the distance between the spray hole 2 and the longitudinal axis of the reaction cylinder 5 is equal to the distance between the spray hole 2 and the inner wall of the reaction cylinder 5.

[0030] For example, during implementation, the distance between the spray hole 2 and the longitudinal axis of the reaction cylinder 5 is denoted as D, and the distance between the spray hole 2 and the inner wall of the reaction cylinder 5 is denoted as L. Where D = L. This positions the spray hole 2 at the midpoint of the radius of the reaction cylinder 5, aiming to ensure that the liquid sprayed from the spray hole 2 effectively covers both the central area and extends to the edge area, thereby reducing the risk of "overly wet center, dry edge" or "splashing edge, insufficient liquid center," and further improving the uniformity of the impregnating liquid spraying.

[0031] Example 4: Based on Example 5 above, in this example, as... Figure 1 As shown, the catalyst impregnation and drying equipment also includes pressure nozzles 6; the number of pressure nozzles 6 is set to several, and the several pressure nozzles 6 are evenly distributed on each of the spray holes 2.

[0032] For example, in the implementation process, the catalyst impregnation and drying equipment described above also includes a pressure nozzle 6. The structure of the pressure nozzle 6 is prior art and will not be described in detail here. For example, the single-fluid pressure nozzle 6 in the prior art patent with authorization announcement number CN209735833U, or the solid conical nozzle head of model KSFHS, can be used. The pressure nozzle 6 is connected to the outlet end (lower end) of the spray hole 2 by means of welding, screwing, or snap-fit, and the outer wall of the pressure nozzle 6 is sealed to the inner wall of the spray hole 2 by means of sealing rings, adhesive bonding, etc. The number of pressure nozzles 6 is set to several, and these pressure nozzles 6 are evenly distributed on each spray hole 2. That is, one pressure nozzle 6 is installed at the outlet end (lower end) of each spray hole 2.

[0033] During use, the impregnation liquid enters the spraying device 1 under pump pressure. After flowing through the spray holes 2, the impregnation liquid enters the pressure nozzle 6. Under pressure, the nozzle atomizes the liquid or forms a controllable jet, spraying downwards into fine, uniform droplets or a liquid film. The aim is to utilize the pressure nozzle 6 to break the impregnation liquid into even finer, more uniform droplets or a liquid film, forming a high-density, low-velocity atomization field, thereby further improving the uniformity of the impregnation liquid spraying.

[0034] Example 5: Based on Example 1 above, in this example, as follows... Figure 1 As shown, the catalyst impregnation and drying equipment also includes a guide plate 7; the guide plate 7 is disposed on the inner wall of the reaction cylinder 5; the guide plate 7 extends around the longitudinal axis of the reaction cylinder 5; the number of guide plates 7 is arranged in a plurality; at least two guide plates 7 are correspondingly disposed above and below the spray device 1; wherein, the cross-sectional area of ​​the guide plate 7 gradually increases along the longitudinal axis of the reaction cylinder 5 toward the spray device 1.

[0035] For example, in the implementation process, the catalyst impregnation and drying equipment also includes a guide plate 7. The guide plate 7 is connected to the inner wall of the reaction cylinder 5 by welding, screwing, or other means, and extends around the longitudinal axis of the reaction cylinder 5. Several guide plates 7 are provided, correspondingly positioned above and below the spray device 1, and the cross-sectional area of ​​the guide plates 7 gradually increases along the longitudinal axis of the reaction cylinder 5 towards the spray device 1. That is, the guide plates 7 are divided into two parts: one part is positioned above the spray device 1, and the other part is positioned below the spray device 1. The cross-sectional area of ​​the guide plates 7 above the spray device 1 gradually increases along the material inlet 4 towards the spray device 1, and the cross-sectional area of ​​the guide plates 7 below the spray device 1 gradually increases along the material outlet 8 towards the spray device 1. The guide plate 7 located above the spray device 1 and the guide plate 7 located below the spray device 1 are arranged opposite each other with their wider ends facing each other.

[0036] During operation, as the reaction cylinder 5 rotates, the material inside the cylinder 5 adheres to the inner wall under centrifugal force. It then slides along the inner wall of the cylinder 5, from the narrower end of the guide plate 7 to the wider end. Guided by the inclined structure of the guide plate 7, the material is laterally spread and radially guided during its movement, gradually converging towards the central axis of the reaction cylinder 5. This aims to better disperse the material into the spray area of ​​the spray device 1, thereby reducing the risk of the material merely rolling along the edges and missing the spray area, thus improving the rolling mixing effect.

[0037] In a preferred embodiment, the guide plate 7 has an arc-shaped structure that bends from the outer wall of the reaction cylinder 5 towards the inner wall of the reaction cylinder 5. This is intended to reduce the risk of breakage of particulate materials and thereby improve the integrity of the particulate materials.

[0038] Example 6: Based on Example 5 above, in this example, as... Figure 2 As shown, several of the guide plates 7 are evenly distributed on the front and rear walls of the reaction cylinder 5.

[0039] For example, in the implementation process, a plurality of the above-mentioned guide plates 7 are provided, and the plurality of guide plates 7 are evenly distributed on the front wall and the rear wall of the reaction cylinder 5. That is, at least four guide plates 7 are provided, and guide plates 7 are provided at the upper end of the front wall, the lower end of the front wall, the upper end of the rear wall, and the lower end of the rear wall of the reaction cylinder 5.

[0040] During operation, as the reaction cylinder 5 rotates, the material flows sequentially through the lower end of the front wall, the upper end of the front wall, the upper end of the rear wall, and the lower end of the rear wall (when the reaction cylinder 5 rotates counterclockwise), or sequentially through the lower end of the rear wall, the upper end of the rear wall, the upper end of the front wall, and the lower end of the front wall (when the reaction cylinder 5 rotates clockwise). As the material flows through the lower end of the front wall, the upper end of the front wall, the upper end of the rear wall, and the lower end of the rear wall, it can be guided by the guide plates 7 at the corresponding positions. This aims to further disperse the material better into the spray area of ​​the spray device 1, thereby reducing the risk of the material merely rolling along the edges and missing the spray area, and ultimately improving the rolling mixing effect of the material.

[0041] Although the present invention has been described herein with reference to several illustrative embodiments, it should be understood that many other modifications and implementations can be devised by those skilled in the art, which will fall within the scope and spirit of the principles disclosed herein. More specifically, various variations and modifications can be made to the components and / or layout of the subject matter combination within the scope of the disclosure, drawings, and claims. Besides variations and modifications to the components and / or layout, other uses will be apparent to those skilled in the art.

Claims

1. A catalyst impregnation and drying device, characterized in that, The device includes a spraying device (1), and the lower end of the spraying device (1) is provided with spraying holes (2); the number of spraying holes (2) is set to several, and the several spraying holes (2) are evenly distributed around the longitudinal axis of the reaction cylinder (5); the several spraying holes (2) are arranged at the same central angle in the horizontal plane to form a complete circular array.

2. The catalyst impregnation and drying equipment according to claim 1, characterized in that: The spraying device (1) is provided with a material channel (3); The material channel (3) extends from the upper end of the spray device (1) to the lower end of the spray device (1), and the material channel (3) corresponds to the material inlet (4); The spray holes (2) are evenly distributed around the material channel (3).

3. The catalyst impregnation and drying equipment according to claim 2, characterized in that: The distance between the spray hole (2) and the longitudinal axis of the reaction cylinder (5) is equal to the distance between the spray hole (2) and the inner wall of the reaction cylinder (5).

4. The catalyst impregnation and drying equipment according to claim 2, characterized in that: It also includes pressure nozzles (6); The number of pressure nozzles (6) is set to several, and the pressure nozzles (6) are evenly distributed on each of the spray holes (2).

5. The catalyst impregnation and drying equipment according to claim 1, characterized in that: It also includes a deflector plate (7); The guide plate (7) is disposed on the inner wall of the reaction cylinder (5); The guide plate (7) extends around the longitudinal axis of the reaction cylinder (5); The number of the guide plates (7) is set to several; At least two of the guide vanes (7) are respectively disposed above and below the spray device (1); The cross-sectional area of ​​the guide plate (7) gradually increases along the longitudinal axis of the reaction cylinder (5) toward the spray device (1).

6. The catalyst impregnation and drying equipment according to claim 5, characterized in that: Several of the aforementioned guide plates (7) are evenly distributed on the front and rear walls of the reaction cylinder (5).

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