A novel catalyst particle

Abstract

The application provides a novel catalyst particle, which comprises a support part, a through hole is formed in the support part, a support particle is arranged on the inner side of the through hole, and a spoiler part is arranged on the top of the support particle; the present loose catalyst can replace a regular catalyst, eliminate gas short circuit in the regular catalyst, increase the contact opportunity and time of gas, liquid and liquid with the catalyst particle, increase the surface area of the catalyst particle body, improve the gas-liquid mass transfer efficiency and the catalytic reaction conversion rate, greatly improve the mass and heat transfer efficiency, and improve the liquid distribution and the gas flow resistance drop.

Description

Technical Field

[0001] This application relates to the field of catalyst technology, specifically to a novel catalyst particle. Background Technology

[0002] In many fields, there are numerous objects that can be processed using a gas-liquid-solid three-phase reaction system, such as in the petrochemical and environmental protection sectors. The principle is that a gas and a liquid are used as reactants, and they react in contact with a solid catalyst to produce the target product. Catalytic distillation technology organically combines catalytic reaction and product separation, and has a certain promoting effect on selective hydrogenation reactions. Its characteristic is that the catalyst is installed in a certain way in the catalytic distillation column, which can avoid the disadvantage of poor catalyst selectivity caused by the deep conversion of olefins in catalytic hydrogenation reactions. At the same time, it can simplify the separation process and save equipment investment.

[0003] The key to catalytic distillation technology lies in the configuration of the catalytic distillation components in the catalytic distillation column. However, since current catalysts are generally spherical or strip-shaped, if they are directly packed into the reaction section of the catalytic distillation column, the small porosity of the catalyst will prevent countercurrent operation within the column. In some chemical catalytic distillation processes, the catalysts used are mostly structured catalysts placed in the distillation column. The most commonly used type is a structured catalyst made of wire mesh, commonly known as a bundled catalyst. This involves attaching the catalyst in a bag between two layers of wire mesh, then rolling it up to form a cylinder. During catalytic distillation, the packing is stacked vertically on a packing support grid to form a catalyst bed. However, this type of structured catalyst has the following drawbacks: there is a large space between the rolled packings. Experiments have shown that gas flows directly upward through this space, forming a gas short circuit and resulting in poor gas-liquid contact, thus hindering mass transfer. Furthermore, because the catalyst is wrapped up, reactants and products must diffuse to contact or leave the catalyst, which also affects the reaction efficiency.

[0004] Therefore, some people have tried to use random-pile catalysts to overcome this shortcoming of structured catalysts. However, because the catalyst and packing shell are difficult to suspend and fix, the manufacturing process is complicated and the cost is high. Moreover, in order to improve the separation effect, traditional random-pile catalysts have a very complex structure design. Therefore, catalytic distillation elements have disadvantages such as complex structure, difficult manufacturing and installation, high production cost, easy clogging, and channeling and wall flow phenomena.

[0005] The applicant, after conducting a search, found the following relevant prior art:

[0006] Application No. 202320217301.4 discloses a four-leaf clover-shaped catalyst particle configuration, comprising: two vertically arranged circular blades; two horizontally arranged elliptical blades, with the major axes of both elliptical blades in the horizontal direction; a central circle positioned between the two circular blades and the two elliptical blades, tangent to each of the two circular blades and the elliptical blades; and four transition circles positioned tangent to adjacent circular blades and elliptical blades. A smooth curve formed by the outer arcs of the two circular blades, the outer arcs of the two elliptical blades, and the inner arcs of the four transition circles constitutes the cross-sectional profile of the catalyst particles. This invention, while meeting catalyst strength requirements, can more effectively increase the specific surface area of ​​the catalyst, improve catalyst reaction efficiency, increase the porosity between catalyst particles, effectively reduce the packing density of catalyst particles, and effectively alleviate the pressure drop problem in the device. However, if the gaps in the catalyst overlap during placement, it can lead to gas channel blockage, still resulting in the inability to achieve countercurrent operation within the distillation column.

[0007] In summary, a new technical solution is needed to address the aforementioned technical problems. Utility Model Content

[0008] This application provides a novel catalyst particle, including a support portion, a through hole on the support portion, a support particle disposed inside the through hole, and a turbulence portion disposed on the top of the support particle.

[0009] As a preferred embodiment, the shape of the through hole is the projection shape of the turbulence part and the support particle on the support part.

[0010] As a preferred embodiment, the support portion can be any shape selected from the following: circular, square, elliptical, heart-shaped, plum blossom-shaped, or irregular.

[0011] As a preferred embodiment, the turbulence section includes a turbulence intermediate component, with at least two turbulence particles disposed on the outer side of the turbulence intermediate component, and the support particles disposed between adjacent turbulence particles.

[0012] As a preferred embodiment, the projection shape of the turbulence particles on the support is any one of the following: arc shape, circle, triangle, rhombus, rectangle, ellipse, clover shape, racetrack shape, and diamond shape.

[0013] As a preferred embodiment, the width of the support particles is 2-6 mm.

[0014] As a preferred option, the width of the support leg is smaller than the minimum width between adjacent turbulent particles.

[0015] As a preferred embodiment, the support particles are inclined, and the angle between the support particles and the support portion is 20°–80°.

[0016] As a preferred option, novel catalyst particles are packed inside the catalytic reactor.

[0017] The randomized catalyst of this application can replace the structured catalyst, eliminate gas short-circuiting in the structured catalyst, increase the contact opportunities and time between gas, liquid and catalyst particles, increase the surface area of ​​the catalyst particles, improve gas-liquid mass transfer efficiency and catalytic reaction conversion rate, significantly improve mass and heat transfer efficiency, and also improve liquid distribution and reduce gas flow resistance. Attached Figure Description

[0018] Figure 1 This is a schematic diagram of the structure from one angle of Embodiment 1 of this application;

[0019] Figure 2 This is a structural schematic diagram from angle two of Embodiment 1 of this application;

[0020] Figure 3 This is a schematic diagram of the structure from angle three of Embodiment 1 of this application;

[0021] Figure 4 This is a partial structural schematic diagram of Embodiment 2 of this application;

[0022] 1. Support part; 2. Through hole; 3. Support particle; 4. Turbulence part; 5. Turbulence intermediate component; 6. Turbulence particle; 7. Transition arc; 8. Connecting part; 9. Disturbing part; 10. End; 11. Intermediate hole. Detailed Implementation

[0023] The following is in conjunction with the appendix Figure 1 To be continued Figure 4 The specific embodiments of this utility model will be described in detail below. It should be noted that the specific embodiments described herein are for illustration and explanation only and are not intended to limit the scope of this utility model.

[0024] Example 1:

[0025] This application provides a novel catalyst particle, comprising a support portion 1 with a circular outer contour. A through-hole 2 is formed on the support portion 1, and a support particle 3 is inclinedly disposed inside the through-hole 2. Preferably, the angle between the support particle 3 and the support portion 1 is 20°–80°. A turbulence-inducing portion 4 is connected to the top of the support particle 3. The turbulence-inducing portion 4 improves the fluid flow pattern and increases the degree of fluid turbulence, thereby achieving uniform fluid distribution and significantly enhancing heat and mass transfer effects. The turbulence-inducing portion 4 can be arc-shaped or planar, depending on the specific circumstances. The choice is simple. In this embodiment, an arc shape is used. The shape of the through hole 2 is the projection shape of the turbulence part 4 and the support particle 3 on the support part 1. There is a gap between the turbulence part 4 and the support part 1, and the arrangement of the support particle 3 makes the gap between the turbulence part 4 and the support part 1 larger. The entire particle forms a large-gap flow guiding structure, and the resistance of the fluid flowing through this element is low. The protruding structure of the turbulence part 4 reduces the clogging of catalyst particles and the difficulty of cleaning. It has a higher space utilization rate in a unit space, reduces the gap between each catalyst, reduces the mass transfer dead zone, and is suitable for occasions with large liquid volume.

[0026] The turbulence-disrupting part 4 includes a turbulence-disrupting intermediate component 5. At least two turbulence-disrupting particles 6 are disposed on the outer side of the turbulence-disrupting intermediate component 5, and a support particle 3 is disposed between adjacent turbulence-disrupting particles 6. In this embodiment, the turbulence-disrupting intermediate component 5 is projected as an annular shape, and three turbulence-disrupting particles 6 are disposed on the outer side of the turbulence-disrupting intermediate component 5. The included angle between adjacent turbulence-disrupting particles 6 is preferably 60°, and a transition arc 7 is disposed within the included angle. The support particle 3 is disposed within the transition arc 7. At least one support particle 3 is disposed; in this embodiment, three support particles 3 are disposed. The width of the support particle 3 is less than the minimum width of the transition arc 7. Preferably, the width of the support particle 3 is 2-6 mm, and the vertical height of the support particle 3 from the top of the support part 1 to the connection point with the turbulence-disrupting particles 6 is 2-15 mm. The turbulence particle 6 in the example includes a connecting part 8 connected to the turbulence intermediate component 5. The connecting part 8 is connected to the disturbance part 9, and the disturbance part 9 is connected to the end part 10. In the projection of the connecting part 8, the disturbance part 9, and the end part 10 on the support part 1, the maximum width of the disturbance part 9 is greater than the maximum width of the connecting part 8 and the end part 10. The maximum width of the connecting part 8 can be equal to the maximum width of the end part 10, or it can be greater than or less than the maximum width of the end part 10. There is no specific limitation, as long as the width of the disturbance part 9 is maximized. In this embodiment, the projection shape of the turbulence particle 6 on the support part 1 is approximately "plum blossom shape", that is, the shape of the through hole is approximately "plum blossom shape". Furthermore, in order to improve the mass transfer efficiency, the turbulence intermediate component 5 is provided with an intermediate hole 11.

[0027] In this embodiment, the novel catalyst particles are filled into the catalytic reactor, which not only improves the heat and mass transfer efficiency, but also gives the catalytic reactor better anti-clogging performance. For tubular reactors, it can achieve full dispersion of fluid, improve the uniformity of fluid material residence time, and reduce the occurrence of side reactions.

[0028] Example 2:

[0029] The difference between this embodiment and Embodiment 1 is that, as Figure 4 As shown, in this embodiment, the turbulence particle 6 is projected as an arc shape on the support part 1. The turbulence particle in this embodiment is arc-shaped.

[0030] This application designs a mold based on the specific shape of the catalyst, performs simple stamping, cutting and bending on a metal plate to punch out support particles 3, and designs turbulence parts 4 such as circles, ellipses and rhombuses between the support particles 3. Based on this, the mold is processed, and the mixed catalyst slurry or powder is filled into the mold. The material is compacted and formed into a specific shape by applying pressure, and then dried and calcined at high temperature to form dense plum blossom-shaped catalyst particles.

[0031] Example 3:

[0032] In this embodiment, the projection shape of the turbulence particle 6 on the support part 1 is circular, with a diameter of 5-12 mm. The width of the support particle is 2-6 mm, the thickness is 2 mm, the vertical height of the highest point of the support particle from the support part is 2-15 mm, and the angle between the support particle and the support part is 20°-80°. In this embodiment, the catalyst particles, while ensuring overall strength, have a larger specific surface area, which significantly shortens the diffusion path of the reactants inside the catalyst particles, thus facilitating the reaction and diffusion of the reactants within the catalyst. At the same time, by adopting the configuration of this embodiment, the packing density of the catalyst particles is significantly reduced, which can greatly reduce the catalyst preparation cost. The porosity of the catalyst bed is significantly increased, which helps to alleviate the problem of rising pressure drop in the reactor bed.

[0033] The catalyst in this application is generally packed in a fluidized bed. The installation position of the catalyst should be determined according to the process requirements, which will not be described in detail in this application. This is conventional prior art and will not be described in detail here. The purpose of this application is to protect the shape of the catalyst particles.

[0034] Due to the adoption of the above technical solution, this application has the following advantages:

[0035] (1) The particles include a turbulent part, which improves the fluid flow pattern and increases the degree of fluid turbulence, thereby achieving uniform distribution of fluid and significantly enhancing the heat and mass transfer effect.

[0036] (2) The setting of the support particles makes the gap between the turbulence part and the support part larger, forming a special large-void flow guiding structure. The resistance of the fluid flowing through the element is low, and the protruding turbulence part reduces the clogging of catalyst particles and the difficulty of cleaning. It has a higher space utilization rate in the unit space, reduces the gap between each catalyst, reduces the mass transfer dead zone, and is suitable for large liquid volume occasions.

[0037] (3) A good spatial triangular support structure is formed between the support particles and multiple turbulence particles, the catalyst shape has good compressive strength and structural integrity, and the service life of the catalyst particles is extended.

[0038] (4) Although the structure of this application is complex, it is relatively easy to process, which significantly reduces the production and manufacturing costs;

[0039] (5) Uniform distribution and high bed porosity result in high bed throughput and low tower pressure drop;

[0040] (6) The turbulence part is a hollow protrusion structure with good gas-liquid channels and mass transfer surface, which allows the liquid to be well dispersed into a film. The surface of the packing is easily wetted by the liquid, which increases the specific surface area of ​​gas-liquid contact, making mass transfer more uniform, improving the reaction efficiency of the catalyst, and further improving the heat transfer and mass transfer separation effect between the reactants, thus realizing the reactive distillation process very well.

[0041] In summary, the randomized catalyst of this application can replace the structured catalyst, eliminate gas short-circuiting in the structured catalyst, increase the contact opportunities and time between gas, liquid and catalyst particles, increase the specific surface area of ​​the catalyst particles, improve gas-liquid mass transfer efficiency and catalytic reaction conversion rate, significantly improve mass and heat transfer efficiency, and also improve liquid distribution and reduce gas flow resistance.

[0042] The preferred embodiments of this application have been described in detail above with reference to the accompanying drawings. However, this application is not limited to the specific details of the above embodiments. Within the scope of the technical concept of this application, various simple modifications can be made to the technical solution of this application, and these simple modifications all fall within the protection scope of this application.

[0043] It should also be noted that the various specific technical features described in the above specific embodiments can be combined in any suitable way without contradiction. In order to avoid unnecessary repetition, the various possible combinations in this application will not be described separately.

[0044] Furthermore, various different implementations of this application can be combined in any way, as long as they do not violate the spirit of this application, and such combinations should also be regarded as the content disclosed in this application.

Claims

1. A novel catalyst particle, characterized in that, It includes a support part (1), a through hole (2) is provided on the support part (1), a support particle (3) is provided on the inner side of the through hole (2), and a turbulence part (4) is provided on the top of the support particle (3). The width of the support particle (3) is 2-6mm.

2. The novel catalyst particle according to claim 1, characterized in that, The shape of the through hole (2) is the projection shape of the turbulence part (4) and the support particle (3) on the support part (1).

3. The novel catalyst particle according to claim 1, characterized in that, The support part (1) can be any shape among circles, squares, ovals, hearts, and plum blossoms.

4. The novel catalyst particle according to claim 1, characterized in that, The turbulence section (4) includes a turbulence intermediate component (5), and at least two turbulence particles (6) are provided on the outer side of the turbulence intermediate component (5), and the support particles (3) are provided between adjacent turbulence particles (6).

5. The novel catalyst particle according to claim 4, characterized in that, The projection shape of the turbulence particles (6) on the support (1) is any one of the following: arc shape, circle, triangle, rhombus, rectangle, ellipse, clover shape, racetrack shape, and rhomboid shape.

6. The novel catalyst particle according to claim 1, characterized in that, The width of the support particle (3) is less than the minimum width between adjacent turbulence particles (6).

7. The novel catalyst particle according to claim 1, characterized in that, The support particles (3) are inclined, and the angle between the support particles (3) and the support part (1) is 20° to 80°.

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