Catalyst extrusion molding equipment

Abstract

The utility model relates to the technical field of catalyst production, and provides catalyst extrusion molding equipment which comprises a spiral conveying section, a pressure equalizing section and an extrusion section which are sequentially connected in the material flowing direction, and the pressure equalizing section comprises a pressure equalizing pipe (1) and a pressure equalizing pore plate (2) arranged in the pressure equalizing pipe (1). And a plurality of uniformly distributed pressure-equalizing through holes (3) are formed in the pressure-equalizing pore plate (2). According to the technical scheme, the pressure equalizing plate with the pressure equalizing through holes is additionally arranged, so that more uniform flow velocity and pressure of materials can be ensured, the uniformity of the materials is ensured, and the quality of a catalyst or a catalyst carrier is improved.

Description

TECHNICAL FIELD

[0001] The present scheme relates to the technical field of catalyst production, and particularly relates to an extrusion molding equipment for catalysts. BACKGROUND

[0002] Catalysts are widely used in chemical industry, petroleum industry, environmental protection and other fields, and their physical properties and activities are closely related to their morphology. In the preparation process of catalysts, extrusion molding equipment is used to extrude catalyst materials through a mold of a specific shape to meet different use requirements. However, there are some problems in the operation of traditional extrusion molding equipment, especially the uneven flow of materials in the extrusion channel, which is specifically manifested in the uneven distribution of flow rate and pressure. Such uneven flow can lead to unstable morphology of the extruded catalyst, affecting the performance and quality of the final product.

[0003] During the flow of materials, if the materials flow too fast or too slow, or the pressure in some areas is too large or too small, it may cause uneven shape and inconsistent density of the catalyst, and even cause blockage and other problems. In addition, uneven flow also has a negative impact on the operational stability of the equipment, shortens the service life of the equipment, and increases the maintenance cost.

[0004] Therefore, solving the problems of speed uniformity and pressure uniformity of materials in the extrusion molding process is one of the keys to improving the quality of catalyst finished products and prolonging the service life of the equipment. Although there are some schemes in the prior art to improve the uniformity of flow, these problems have not been fundamentally solved, and further optimization of the catalyst extrusion molding equipment still needs to be studied. CONTENT OF THE INVENTION

[0005] One of the technical problems to be solved by the present scheme is the uneven flow rate and pressure of materials in the catalyst extrusion molding equipment.

[0006] To solve the above technical problems, the present scheme provides an extrusion molding equipment for catalysts, which comprises a spiral conveying section, a pressure equalizing section and an extrusion section connected in sequence along the flow direction of the materials, wherein the pressure equalizing section comprises a pressure equalizing pipe and a pressure equalizing hole plate arranged in the pressure equalizing pipe, and a plurality of uniformly distributed pressure equalizing through holes are arranged on the pressure equalizing hole plate.

[0007] In some embodiments, the plurality of pressure equalizing through holes have the same shape.

[0008] In some embodiments, the inner diameter of the pressure equalizing through holes gradually decreases along the flow direction of the materials.

[0009] In some embodiments, the pressure equalizing pipe has a tapered through hole, and the pressure equalizing hole plate is arranged at the upstream end of the tapered through hole.

[0010] In some embodiments, the extrusion section includes an extrusion die having an extrusion orifice.

[0011] In some embodiments, the extrusion section includes a pin coaxially disposed in the extrusion orifice.

[0012] In some embodiments, the extrusion section includes a support tube located upstream of the extrusion die, a support plate supported in the support tube, the pin being connected to the support plate, and the support plate having an opening surrounding the pin.

[0013] In some embodiments, the spiral conveying section includes a conveying pipe and a conveying shaft rotatably disposed in the conveying pipe, wherein spiral blades are disposed on the outer ring of the conveying shaft.

[0014] In some embodiments, the spiral conveying section includes a cooling jacket fitted over the outside of the conveying pipe.

[0015] In some embodiments, the conveyor shaft is provided with cooling channels inside.

[0016] By using the above technical solution, and by adding a pressure equalization plate with pressure equalization through holes, it is possible to ensure that the material has a more uniform flow rate and pressure, thus ensuring the uniformity of the material and improving the quality of the catalyst or catalyst support. Attached Figure Description

[0017] To more clearly illustrate the technical solutions in the embodiments of this scheme or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this scheme. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0018] Figure 1 This is a cross-sectional view of the catalyst extrusion molding equipment of the embodiment of this scheme.

[0019] Explanation of reference numerals in the attached figures:

[0020] 1. Pressure equalizing pipe; 2. Pressure equalizing plate; 3. Pressure equalizing through hole; 4. Extrusion die; 5. Extrusion hole; 6. Hole needle; 7. Support plate; 8. Support pipe; 9. Conveying pipe; 10. Conveying shaft; 11. Cooling channel; 12. Cooling jacket; 13. Spiral blade; 14. End plate. Detailed Implementation

[0021] The implementation of this solution will be further described in detail below with reference to the accompanying drawings and embodiments. The detailed description of the embodiments and the accompanying drawings below are used to illustrate the principle of this solution by way of example, but should not be used to limit the scope of this solution. This solution can be implemented in many different forms and is not limited to the specific embodiments of the solution described herein, but includes all technical solutions falling within the scope of the claims.

[0022] These embodiments are provided to make the present solution thorough and complete, and to fully express the scope of the present solution to those skilled in the art. It should be noted that, unless otherwise specifically stated, the relative arrangement of components and steps, material composition, numerical expressions and values ​​described in these embodiments should be interpreted as exemplary only and not as limiting.

[0023] It should be noted that, in the description of this scheme, unless otherwise stated, "multiple" means two or more; the terms "upper," "lower," "left," "right," "inner," and "outer," etc., indicating orientation or positional relationships, are only for the convenience of describing this scheme 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 on this scheme. When the absolute position of the object being described changes, the relative positional relationship may also change accordingly.

[0024] Furthermore, the terms "first," "second," and similar terms used in this scheme do not indicate any order, quantity, or importance, but are merely used to distinguish different parts. "Vertical" is not strictly vertical, but within the allowable margin of error. "Parallel" is not strictly parallel, but within the allowable margin of error. Terms such as "including" or "contains" mean that the element preceding the term covers the element listed after it, and do not exclude the possibility of including other elements as well.

[0025] It should also be noted that, in the description of this solution, 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 direct connection or an indirect connection through an intermediate medium. Those skilled in the art can understand the specific meaning of the above terms in this solution depending on the specific circumstances. When a specific device is described as being located between a first device and a second device, an intermediary device may or may not be present between the specific device and the first or second device.

[0026] All terms used in this protocol have the same meaning as understood by one of ordinary skill in the art, unless otherwise specifically defined. It should also be understood that terms defined in general dictionaries should be interpreted as having meanings consistent with their meanings in the context of the relevant art, and not as idealized or highly formalized, unless explicitly defined herein.

[0027] Techniques, methods, and equipment known to those skilled in the art may not be discussed in detail, but where appropriate, they should be considered part of the specification.

[0028] This solution discloses an extrusion molding equipment for a catalyst, which includes a spiral conveying section, a pressure equalization section and an extrusion section connected sequentially along the material flow direction. The pressure equalization section includes a pressure equalization pipe 1 and a pressure equalization orifice plate 2 disposed in the pressure equalization pipe 1. The pressure equalization orifice plate 2 is provided with a plurality of uniformly distributed pressure equalization through holes 3.

[0029] The screw conveyor section pushes the material flow along the material flow direction, and the material rotates under the action of the screw and flows towards the pressure equalization section.

[0030] The pressure equalization pipe 1 is connected to the screw conveyor section, and a pressure equalization orifice plate 2 is provided therein. The pressure equalization orifice plate 2 has uniformly distributed pressure equalization through holes 3 to allow the material to flow through the pressure equalization through holes 3.

[0031] The extrusion section is connected to the pressure equalization pipe 1, and the material is extruded from the extrusion section to form a specific target shape.

[0032] The extrusion molding equipment can be used to produce catalyst particles or catalyst carrier particles. When used to produce catalyst carrier particles, the catalyst carrier particles can be subjected to a catalyst impregnation process.

[0033] As mentioned above, extrusion molding equipment generally uses a spiral conveyor section, that is, the material flows in a spiral propulsion manner, which results in uneven distribution of the flow velocity and pressure of the material in the flow channel.

[0034] In this design, a pressure equalization orifice plate 2 is added to the pressure equalization pipe 1. When the material reaches the pressure equalization orifice plate 2, it passes through the pressure equalization through holes 3. The inner diameter of the pressure equalization through holes 3 is smaller than that of the pressure equalization pipe 1 and the conveying channel of the spiral conveyor section. This restricts the lateral flow of the material (perpendicular to the axial direction of the pressure equalization pipe 1), allowing the material to flow along the central axis of each pressure equalization orifice plate 2. This ensures that the material is more evenly distributed in the direction perpendicular to the axial direction of the pressure equalization pipe 1, forming a material flow with a basically the same velocity at each location, and creating a more uniform pressure distribution. This ensures the uniformity of the material and improves the quality of the extruded catalyst or catalyst carrier.

[0035] In this scheme, by adding a pressure equalization plate with pressure equalization through holes, it is possible to ensure that the material has a more uniform flow rate and pressure, ensure the uniformity of the material, and improve the quality of the catalyst or catalyst support.

[0036] In some embodiments, the multiple pressure equalization holes 3 have the same shape. That is, each pressure equalization hole 3 has the same size. The upstream of the pressure equalization plate 2 is a flow space with a large inner diameter. The material entering the pressure equalization holes 3 is subjected to compression. The pressure equalization holes 3 of the same size can ensure that the compression effect on the material at each position is basically the same, thereby achieving uniformity of material flow rate and pressure.

[0037] In some embodiments, the inner diameter of the pressure equalization through-hole 3 gradually decreases along the material flow direction. The pressure equalization through-hole 3 forms a tapered orifice, allowing the material to be gradually compressed as it flows through it.

[0038] Regarding the distribution of the pressure equalizing holes 3 on the pressure equalizing orifice plate 2, multiple rings of pressure equalizing holes 3 can be arranged around the central axis, with the radial distance between adjacent rings being the same, and the circumferential distance between pressure equalizing holes 3 within the same ring being the same. Of course, other uniform distribution methods can also be adopted, which will not be described in detail here.

[0039] In some embodiments, the equalizing pipe 1 has a tapered through-hole, and the equalizing plate 2 is disposed upstream of the tapered through-hole. (Reference) Figure 1 As shown, the pressure equalization pipe 1 generally includes an upstream section and a downstream section. The inner diameter of the upstream section is larger than that of the downstream section, forming a stepped surface, on which the pressure equalization orifice plate 2 presses against. The inner diameter of the downstream section gradually decreases, forming a tapered through-hole, allowing the material to continue to be gradually compressed after passing through the pressure equalization orifice plate 2.

[0040] In some embodiments, the extrusion section includes an extrusion die 4 with extrusion orifices 5. Material flows through the extrusion orifices 5 of the extrusion die 4, thereby forming catalyst particles or catalyst support particles corresponding to the shape of the extrusion orifices 5.

[0041] In some embodiments, the extrusion section includes a pin 6 coaxially disposed in the extrusion orifice 5. An annular space is formed between the pin 6 and the extrusion orifice 5, thus allowing the material to form a tubular structure after passing through the extrusion orifice 5 and the pin 6. The extrusion orifice 5 is generally circular, but can be configured in other shapes as needed.

[0042] In some embodiments, the extrusion section includes a support tube 8 located upstream of the extrusion die 4, a support plate 7 supported within the support tube 8, and a perforated pin 6 connected to the support plate 7. The support plate 7 has openings surrounding the perforated pin 6. The downstream end of the support tube 8 is connected to the extrusion die 4. The outer diameter of the extrusion die 4 can be smaller than the outer diameter of the support tube 8, and the extrusion die 4 can be inserted into the downstream end of the support tube 8. The support plate 7 is located within the support tube 8, with its outer peripheral edge engaging with the inner peripheral surface of the support tube 8. One end of the perforated pin 6 is connected to the support plate 7, and the other end is inserted into the extrusion hole 5. Furthermore, the support plate 7 has openings to allow material to pass through; these openings are evenly distributed to ensure material uniformity.

[0043] Figure 1 In the extrusion die 4, an extrusion hole 5 is provided, and correspondingly, a pin 6 is provided on the support plate 7. In other embodiments, multiple extrusion holes 5 can be provided on the extrusion die 4, and correspondingly, multiple pins 6 are provided on the support plate 7 that are respectively inserted into the extrusion holes 5.

[0044] In some embodiments, the spiral conveying section includes a conveying pipe 9 and a conveying shaft 10 rotatably disposed within the conveying pipe 9. The outer circumference of the conveying shaft 10 is provided with spiral blades 13. The conveying pipe 9 can be a circular pipe, and the conveying shaft 10 can be coaxially disposed with the conveying pipe 9. When the conveying shaft 10 rotates, the spiral blades 13 on it can push the material flow. This flow involves rotation around a central axis, and the pressure equalizing orifice plate 2 described above can restrict such rotation, adjusting the material flow direction to the axial direction.

[0045] In some embodiments, the spiral conveying section includes a cooling jacket 12 fitted over the outside of the conveying pipe 9. A cooling space is formed between the cooling jacket 12 and the conveying pipe 9, and a cooling medium is injected into the cooling space to cool the conveying pipe 9 and the material therein.

[0046] In some embodiments, the conveyor shaft 10 is provided with a cooling channel 11 inside. Cooling fluid can be injected into the cooling channel 11 in the conveyor shaft 10 to cool the conveyor shaft 10 and, in turn, cool the material around it.

[0047] The various embodiments of this solution have now been described in detail. To avoid obscuring the concept of this solution, some details known in the art have not been described. Those skilled in the art can fully understand how to implement the technical solution described above.

[0048] Although specific embodiments of this solution have been described in detail by way of examples, those skilled in the art should understand that the above examples are for illustrative purposes only and are not intended to limit the scope of this solution. Those skilled in the art should understand that modifications can be made to the above embodiments or equivalent substitutions can be made to some technical features without departing from the scope and spirit of this solution. In particular, as long as there is no structural conflict, the various technical features mentioned in the various embodiments can be combined in any way.

Claims

1. An extrusion molding apparatus for a catalyst, characterized in that, It includes a spiral conveying section, a pressure equalization section and an extrusion section connected in sequence along the material flow direction. The pressure equalization section includes a pressure equalization pipe (1) and a pressure equalization orifice plate (2) disposed in the pressure equalization pipe (1). The pressure equalization orifice plate (2) is provided with a plurality of uniformly distributed pressure equalization through holes (3).

2. The extrusion molding equipment for the catalyst according to claim 1, characterized in that, The multiple equalizing through holes (3) have the same shape.

3. The extrusion molding equipment for the catalyst according to claim 1, characterized in that, The inner diameter of the equalizing through hole (3) gradually decreases along the material flow direction.

4. The extrusion molding equipment for the catalyst according to claim 1, characterized in that, The equalizing pipe (1) has a tapered through hole, and the equalizing plate (2) is disposed at the upstream end of the tapered through hole.

5. The extrusion molding equipment for the catalyst according to claim 1, characterized in that, The extrusion section includes an extrusion die (4) with an extrusion orifice (5).

6. The extrusion molding equipment for the catalyst according to claim 5, characterized in that, The extrusion section includes a needle (6) coaxially disposed in the extrusion orifice (5).

7. The extrusion molding equipment for the catalyst according to claim 6, characterized in that, The extrusion section includes a support tube (8) located upstream of the extrusion die (4), a support plate (7) supported in the support tube (8), a pin (6) connected to the support plate (7), and an opening surrounding the pin (6) on the support plate (7).

8. The extrusion molding equipment for the catalyst according to claim 1, characterized in that, The spiral conveying section includes a conveying pipe (9) and a conveying shaft (10) rotatably disposed in the conveying pipe (9), and a spiral blade (13) is provided on the outer ring of the conveying shaft (10).

9. The extrusion molding equipment for the catalyst according to claim 8, characterized in that, The spiral conveying section includes a cooling jacket (12) fitted over the outside of the conveying pipe (9).

10. The extrusion molding equipment for the catalyst according to claim 8, characterized in that, The conveyor shaft (10) is provided with a cooling channel (11).

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