Three-blade-wheel-shaped catalyst particle structure

Abstract

The utility model discloses a three-blade wheel-shaped catalyst particle structure which at least comprises a blade circle, a plurality of blade rings, a plurality of blades and a plurality of catalyst particles, wherein the blade circle is used for forming three blade outer arc lines which are arranged at intervals; a center circle concentric with the blade circle; the number of the blade angle circles is six, every two blade angle circles form a group, and each blade angle circle is tangent to the blade circle; the number of the transition ellipses is nine, every three transition ellipses form a group, each group of transition ellipses comprises a large transition ellipse which is transversely arranged and two small transition ellipses which are vertically arranged, and the two small transition ellipses in each group intersect with the large transition ellipses in the same group and jointly form a U shape; the large transition ellipses in each group are tangent to the center circle, and the two small transition ellipses in each group are tangent to the corresponding blade angle circles respectively; a smooth curve formed by the outer arcs of the three blades, the outer arcs of the six blade angle circles, the inner arcs of the six transition small ellipses and the inner arcs of the three transition large ellipses forms the contour line of the cross section of the catalyst particle; the three blades formed in the cross section are in an axe blade shape, and the three inter-blade grooves formed in the cross section are in an omega shape.

Description

Technical Field

[0001] This utility model relates to catalysts used in the petrochemical field, and in particular to a three-bladed catalyst particle configuration. Background Technology

[0002] In practical applications, solid catalysts must be processed into particles of a specific shape and size to ensure that their hydrodynamic properties meet the requirements of the catalytic process. Supports in supported catalysts act as the framework for the active components and can interact with them, effectively improving the utilization rate of the active components and enhancing the catalyst's thermal stability and resistance to poisoning.

[0003] The morphology of a catalyst significantly influences its strength, specific surface area, pore volume, pressure drop, and mass transfer efficiency, playing a crucial role in petroleum refining. Currently, catalyst morphologies include cylindrical strips, cloverleaf shapes, tetrafoliate shapes, toothed spheres, and bird's nest shapes. In petroleum refining, tetrafoliate catalysts are commonly used, with their cross-sections typically exhibiting a symmetrical tetrafoliate shape. Compared to cylindrical strip catalysts, tetrafoliate catalysts increase specific surface area, improve reaction efficiency, increase porosity between catalyst particles, and effectively alleviate pressure drop issues in the unit.

[0004] In the prior art, for example, Chinese patent CN219424413U discloses a four-bladed catalyst particle configuration, see reference. Figure 1 The catalyst bed consists of four elliptical blades, two horizontally and two vertically arranged. The centers of these four elliptical blades are connected to form a square. The four elliptical blades are evenly spaced and tangent to an external circle. A central circle, concentric with the external circle and located inside the four elliptical blades, is also concentric with the square. Four transition ellipses are positioned tangent to adjacent elliptical blades and the central circle. A smooth curve formed by the outer arcs of the four elliptical blades and the inner arcs of the four transition ellipses defines the cross-sectional profile of the catalyst particles. While this scheme achieves a low particle packing density and a high porosity in the catalyst bed, enhancing the filtration and storage capacity for mechanical impurities and optimizing material distribution, it faces challenges due to the increasing difficulty of crude oil extraction and the significant depletion of conventional crude oil resources. Low-quality crude oil is characterized by its diverse types, processing difficulties, and increasing proportion. Metal and coke deposits are more likely to clog catalyst pores, reducing apparent activity and causing bed blockage. Therefore, the catalyst requires higher porosity and a higher capacity for impurity removal / disposal.

[0005] Therefore, there is an urgent need for a more optimized three-bladed catalyst particle configuration compared to the existing technologies mentioned above. This configuration would allow for more open particle grooves while meeting catalyst strength requirements, thereby further reducing particle packing density, increasing the porosity between catalyst particles, and enhancing the filtration and storage capacity for mechanical impurities. This would effectively alleviate the pressure drop problem in the device.

[0006] The information disclosed in this background section is intended only to enhance the understanding of the overall background of this utility model and should not be construed as an admission or in any way implying that the information constitutes prior art known to those skilled in the art. Utility Model Content

[0007] The purpose of this invention is to provide a three-bladed catalyst particle configuration that, while meeting the catalyst strength requirements, allows for more open particle grooves, lower particle packing density, and higher porosity in the catalyst bed. This further enhances the filtration and storage capacity for mechanical impurities, optimizes material distribution, significantly alleviates the increase in catalyst bed pressure drop, effectively improves catalyst utilization, and fully leverages catalyst activity.

[0008] To achieve the above objectives, this utility model provides a three-blade-shaped catalyst particle configuration, comprising at least: blade circles, which form three spaced-apart outer arcs; a central circle, which is concentric with the blade circles; six blade corner circles, arranged in pairs, each blade corner circle being tangent to the blade circle; and nine transition ellipses, arranged in groups of three, each group of transition ellipses including a horizontally arranged large transition ellipse and two vertically arranged small transition ellipses, the two small transition ellipses in each group intersecting with the large transition ellipse in the same group and forming a "U" shape; each group of large transition ellipses is tangent to the central circle, and each group of two small transition ellipses is tangent to the corresponding blade corner circles; a smooth curve composed of the three outer arcs of the blades, the outer arcs of the six blade corner circles, the inner arcs of the six small transition ellipses, and the inner arcs of the three large transition ellipses forms the cross-sectional outline of the catalyst particle; the three blades formed in the cross-section are "axe-blade" shaped, and the three inter-blade grooves formed in the cross-section are "Ω" shaped.

[0009] Furthermore, in the above technical solution, let the radius of the blade circle be R; the radius of the center circle be r1; the radius of the blade corner circle be r2; the length of the major axis of the transition ellipse be D, and the length of the minor axis be d; and the length of the major axis of the transition ellipse be A, and the length of the minor axis be a.

[0010] Furthermore, in the above technical solution, R can be from 0.7mm to 3.0mm. r1 can be 1 / 4 to 1 / 3 of R; D can be 2 / 5 to 1 / 2 of R; A can be 1 / 3 to 1 / 2 of R.

[0011] Furthermore, in the above technical solution, d can be 1 / 2 to 2 / 3 of D. a can be 2 / 5 to 2 / 3 of A.

[0012] Furthermore, in the above technical solution, the length of A is preferably less than the length of D. Preferably, r2 is satisfied. <a<d<r1。

[0013] Furthermore, in the above technical solution, the length of D can be 0.3mm to 1.5mm; the length of d can be 0.1mm to 1.0mm; the length of A can be 0.2mm to 1.5mm; and the length of a can be 0.1mm to 1.0mm.

[0014] Compared with the prior art, the present invention has the following beneficial effects:

[0015] 1) This utility model is based on Figure 1 The improvements shown are based on the existing configuration to address the characteristics of low-quality crude oil, which is characterized by its diverse types, difficulty in processing, and increasingly large proportion.

[0016] 2) This utility model is composed of a configuration in which three outer arc lines of blades, six outer arc lines of blade corner circles, six inner arc lines of transitional small ellipses, and three inner arc lines of transitional large ellipses are tangentially connected. This makes the opening degree of the inter-blade grooves relatively larger. Under the premise of ensuring particle strength, it can effectively solve the problem of catalyst pore blockage. It can also make the catalyst have a smaller particle packing density and the catalyst bed have a higher porosity. This can enhance the filtering and storage capacity of mechanical impurities, optimize the material distribution, greatly alleviate the rise of catalyst bed pressure drop, effectively improve the catalyst utilization rate, and give full play to the activity of the catalyst.

[0017] 3) The three blades in the "axe blade" shape of this utility model are centrally symmetrically arranged, so the outer surface of the overall configuration of the particle cross-section is curved, which makes the particle most stable and can maximize the overall strength of the particle; through the alternating arrangement of the three "Ω" shaped inter-blade grooves and the three "axe blade" shaped blades, the specific surface area of ​​the catalyst particles can be effectively increased while ensuring the overall strength of the catalyst particles, thereby further improving the utilization rate of the catalyst and giving full play to the activity of the catalyst.

[0018] 4) The three blades in the "axe blade" shape of this utility model are spaced apart, that is, the adjacent blades are not tangent to each other and are smoothly connected by the "Ω" shaped inter-blade groove. This can ensure that the diameter of the central circle is not too small and obtain a relatively open state of the inter-blade groove.

[0019] The above description is only an overview of the technical solution of this utility model. In order to better understand the technical means of this utility model and to implement it according to the contents of the specification, and to make the above and other objects, technical features and advantages of this utility model easier to understand, one or more preferred embodiments are listed below and described in detail with reference to the accompanying drawings. Attached Figure Description

[0020] Figure 1 This is a schematic diagram of the catalyst particle configuration in the existing technology.

[0021] Figure 2 This is a schematic diagram of the configuration of the three-bladed catalyst particles of this utility model.

[0022] Explanation of main figure reference numerals ( Figure 2 ):

[0023] 1- Leaf blade round; 2A- First leaf angle round, 2B- Second leaf angle round, 2C- Third leaf angle round, 2D- Fourth leaf angle round, 2E- Fifth leaf angle round, 2F- Sixth leaf angle round; 3A- First transitional large ellipse, 3B- Second transitional large ellipse, 3C- Third transitional large ellipse; 4A- First transitional small ellipse, 4B- Second transitional small ellipse, 4C- Third transitional small ellipse, 4D- Fourth transitional small ellipse, 4E- Fifth transitional small ellipse, 4F- Sixth transitional small ellipse; 5- Center circle. Detailed Implementation

[0024] The specific embodiments of this utility model will be described in detail below with reference to the accompanying drawings. However, it should be understood that the scope of protection of this utility model is not limited to the specific embodiments.

[0025] Unless otherwise expressly stated, throughout the specification and claims, the term "comprising" or its variations such as "including" or "comprises" shall be understood to include the stated elements or components without excluding other elements or other components.

[0026] In this document, for ease of description, spatial relative terms such as “below,” “under,” “down,” “above,” “above,” “upper,” etc., are used to describe the relationship of one element or feature to another element or feature in the accompanying drawings. It should be understood that spatial relative terms are intended to encompass different orientations of an object in use or operation, in addition to those depicted in the figures. For example, if an object in the figure is flipped, an element described as “below” or “under” another element or feature would be oriented “above” that element or feature. Thus, the exemplary term “below” can encompass both the downward and upward orientations. An object may also have other orientations (rotated 90 degrees or other orientations), and the spatial relative terms used herein should be interpreted accordingly.

[0027] In this document, the terms "first," "second," etc., are used to distinguish two different elements or parts, and are not used to define specific positions or relative relationships. In other words, in some embodiments, the terms "first," "second," etc., can also be used interchangeably.

[0028] First, it should be noted that this utility model is... Figure 1 The improvement based on the existing configuration shows that the inter-blade grooves of the three-blade wheel-shaped catalyst particles are more open, in order to cope with the characteristics of the current low-quality crude oil, which is characterized by many types, difficult processing and an increasing proportion. It also solves the problem that metal and coke deposition is more likely to cause catalyst pore blockage, apparent activity reduction and bed blockage. Therefore, while ensuring strength, the catalyst needs to have higher porosity and higher ability to remove / dispose of impurities.

[0029] like Figure 2 As shown, this utility model provides a three-bladed catalyst particle configuration, including at least a blade circle, a center circle, a blade corner circle, and a transition ellipse. The blade circle 1 is used to form three spaced-apart outer arcs of the blades (i.e.,... Figure 2 The three solid lines on the blade circle 1 represent the arcs. The center circle 5 is concentric with the blade circle 1. There are six blade angle circles, arranged in pairs, i.e., according to... Figure 2 The leaf corner circles, arranged clockwise, are: first leaf corner circle 2A, second leaf corner circle 2B, third leaf corner circle 2C, fourth leaf corner circle 2D, fifth leaf corner circle 2E, and sixth leaf corner circle 2F. Each leaf corner circle is tangent to the inner side of the leaf circle 1. There are nine transition ellipses, grouped in sets of three. Each group of transition ellipses includes one large transition ellipse positioned horizontally and two small transition ellipses positioned vertically (here, "horizontal" and "vertical" refer to their radial orientation relative to the leaf circle 1). Specifically, the first large transition ellipse 3A is grouped with the first small transition ellipse 4A and the second small transition ellipse 4B; the second large transition ellipse 3B is grouped with the third small transition ellipse 4C and the fourth small transition ellipse 4D; and the third large transition ellipse 3C is grouped with the fifth small transition ellipse 4E and the sixth small transition ellipse 4F. The two small transition ellipses in each group intersect with the large transition ellipse in the same group, forming a "U" shape (see reference). Figure 2For example, the vertically arranged first transition ellipse 4A and second transition ellipse 4B intersect the two ends of the major axis of the first transition ellipse 3A, respectively. These three transition ellipses in the same group together form a "U"-shaped structure. The configuration of the other two groups is the same and will not be described again here. In addition, the transition ellipse of each group (i.e., the first transition ellipse 3A, the second transition ellipse 3B, and the third transition ellipse 3C) is tangent to the central circle 5. The two transition ellipses in each group are tangent to the corresponding blade angle circles. For example, the first transition ellipse 4A is tangent to the first blade angle circle 2A, and the second transition ellipse 4B is tangent to the second blade angle circle 2B. The configuration of the other two groups is the same and will not be described again here. Thus, the configuration of the three-bladed catalyst particle of this utility model is completed, with the outer arc of the three blades, the outer arc of the six blade angle circles, and the inner arc of the six transition ellipses (i.e., Figure 2 The corresponding solid line portion), and the inner arcs of the three transitional large ellipses (i.e. Figure 2 The smooth curve formed by the corresponding solid lines in the diagram constitutes the cross-sectional outline of the catalyst particle; the three blades formed in the cross-section are "axe-blade" shaped, and the three inter-blade grooves formed in the cross-section are "Ω" shaped. It should be noted that the "outer arc of the blade angle circle," the "inner arc of the transition small ellipse," and the "inner arc of the transition large ellipse" in this invention are defined as "inner" and "outer" (i.e., ...) with the axis of the axe-blade-shaped blade as a reference. Figure 2 (The corresponding solid-line circular arc and solid-line elliptical arc).

[0030] Catalyst particles with this type of cross-sectional profile (the particles consist of an internal solid support and surface active components) have a centrally symmetrical configuration. This configuration consists of three outer arcs of blades, six outer arcs of blade corner rounded edges, six inner arcs of transitional small ellipses, and three inner arcs of transitional large ellipses, all tangentially connected. This allows for a relatively larger opening of the inter-blade grooves, effectively solving the problem of catalyst pore blockage while ensuring particle strength. It also results in a lower particle packing density and a higher porosity in the catalyst bed, enhancing the filtration and storage capacity for mechanical impurities, optimizing material flow distribution, significantly mitigating the increase in catalyst bed pressure drop, effectively improving catalyst utilization, and fully maximizing catalyst activity.

[0031] Further as Figure 2 As shown, because the three "axe-blade" shaped blades are centrally symmetrically arranged, the overall configuration of the particle cross-section is... Figure 2The outer surface of the central axis is a curved surface, so that the stability of the particles is the strongest, and the overall strength of the particles can be ensured to the greatest extent. By alternately arranging three "Ω"-shaped inter-blade grooves and three "axe-edge"-shaped blades, the specific surface area of the catalyst particles can be effectively increased while ensuring the overall strength of the catalyst particles, thereby further improving the utilization rate of the catalyst and giving full play to the activity of the catalyst.

[0032] Furthermore, as Figure 2 shown, when designing the cross-sectional configuration of the particles, the present invention sets the radius of the blade circle 1 as R; the radius of the central circle 5 as r1; the radius of each leaf angle circle as r2; the major axis length of each transition large ellipse as D, and the minor axis length as d; the major axis length of each transition small ellipse as A, and the minor axis length as a. Further, preferably but not limited to, the radius R of the blade circle 1 can be 0.7 mm to 3.0 mm. The radius r1 of the central circle 5 is 1 / 4 to 1 / 3 of R, the major axis length D of the transition large ellipse is 2 / 5 to 1 / 2 of R; the major axis length A of the transition small ellipse is 1 / 3 to 1 / 2 of R. In addition, the minor axis length d of the transition large ellipse is 1 / 2 to 2 / 3 of the major axis length D, and the major axis length A of the transition small ellipse is less than the major axis length D of the transition large ellipse. Furthermore, the present invention also preferably satisfies r2 < a < d < r1. Specifically, the major axis length D of the transition large ellipse can be 0.3 mm to 1.5 mm, the minor axis length d of the transition large ellipse can be 0.1 mm to 1.0 mm; the major axis length A of the transition small ellipse can be 0.2 mm to 1.5 mm; the minor axis length a of the transition small ellipse can be 0.1 mm to 1.0 mm. Experiments and calculations show that through such a configuration design, the overall strength and specific surface area of the catalyst particles can be taken into account.

[0033] In the present invention, intervals are provided between the three "axe-edge"-shaped blades, that is, adjacent blades are not tangent to each other and are smoothly connected through "Ω"-shaped inter-blade grooves. This can not only ensure that the diameter size of the central circle is not too small, but also obtain a relatively open state of the inner arc of the blade (that is, the inter-blade groove). If the size of the central circle is too small, it will lead to a smaller size in the middle of the catalyst carrier, resulting in poor overall stability of the catalyst. The relatively open "inter-blade groove" constitutes the smooth constriction particle groove of the catalyst, solving the problems in the prior art such as large particle packing density, low filtering and storage capacity for mechanical impurities, uneven distribution of raw material logistics leading to easy coking, and rising pressure drop of the catalyst bed. It not only effectively improves the utilization rate of the catalyst, but also can give full play to the activity of the catalyst.

[0034] The foregoing description of specific exemplary embodiments of the present invention is for illustrative and explanatory purposes. These descriptions are not intended to limit the present invention to the precise forms disclosed, and it will be apparent that many changes and variations can be made in accordance with the foregoing teachings. The exemplary embodiments were chosen and described in order to explain the specific principles of the present invention and its practical applications, thereby enabling those skilled in the art to implement and utilize various different exemplary embodiments of the present invention, as well as various different choices and variations. Any simple modifications, equivalent changes, and alterations made to the foregoing exemplary embodiments should fall within the protection scope of the present invention.

Claims

1. A three-bladed, wheel-shaped catalyst particle configuration, characterized in that, include: The blade circle is used to form three spaced-apart outer arcs on the blade. The central circle is concentric with the blade circle; There are six leaf horn circles, which are arranged in pairs, and each leaf horn circle is tangent to the leaf blade circle. There are nine transition ellipses, arranged in groups of three. Each group of transition ellipses includes a large transition ellipse arranged horizontally and two small transition ellipses arranged vertically. The two small transition ellipses in each group intersect with the large transition ellipse in the same group and together form a "U" shape. The large transition ellipse in each group is tangent to the central circle, and the two small transition ellipses in each group are tangent to the corresponding leaf corner circle. The smooth curve formed by the three outer arcs of the blades, the six outer arcs of the blade corner circles, the six inner arcs of the transition small ellipses, and the three inner arcs of the transition large ellipses forms the cross-sectional outline of the catalyst particle; the three blades formed in the cross-section are "axe-blade" shaped, and the three inter-blade grooves formed in the cross-section are "Ω" shaped.

2. The three-bladed catalyst particle configuration according to claim 1, characterized in that, The radius of the blade circle is R; the radius of the center circle is r1; the radius of the blade corner circle is r2; the major axis of the transition ellipse is D, and the minor axis is d; the major axis of the transition ellipse is A, and the minor axis is a.

3. The three-bladed catalyst particle configuration according to claim 2, characterized in that, The R is 0.7 mm to 3.0 mm.

4. The three-bladed catalyst particle configuration according to claim 3, characterized in that, The r1 is 1 / 4 to 1 / 3 of R; the D is 2 / 5 to 1 / 2 of R; and the A is 1 / 3 to 1 / 2 of R.

5. The three-bladed catalyst particle configuration according to claim 4, characterized in that, The d is 1 / 2 to 2 / 3 of D.

6. The three-bladed catalyst particle configuration according to claim 4, characterized in that, The value of a is 2 / 5 to 2 / 3 of A.

7. The three-bladed catalyst particle configuration according to claim 4, characterized in that, The length of A is less than the length of D.

8. The three-bladed catalyst particle configuration according to claim 2, characterized in that, The r2 <a<d<r1。 9. The three-bladed catalyst particle configuration according to claim 5, characterized in that, The length of D is 0.3mm to 1.5mm; the length of d is 0.1mm to 1.0mm.

10. The three-bladed catalyst particle configuration according to claim 6, characterized in that, The length of A is 0.2mm to 1.5mm; the length of a is 0.1mm to 1.0mm.

Images