CN111113995A

CN111113995A - Catalyst forming die and bar extruding machine comprising same

Info

Publication number: CN111113995A
Application number: CN201811278201.2A
Authority: CN
Inventors: 张少钢; 郑新; 王忠华; 王平; 徐国恩; 刘成
Original assignee: China Petroleum and Chemical Corp; Sinopec Catalyst Co
Current assignee: China Petroleum and Chemical Corp; Sinopec Catalyst Co
Priority date: 2018-10-30
Filing date: 2018-10-30
Publication date: 2020-05-08

Abstract

The application relates to the field of catalyst preparation devices, and discloses a catalyst forming die and a bar extruding machine comprising the same. The catalyst forming die comprises a flange (1), a template (2) and a ceramic ring (3), wherein the outer periphery of the template (2) is connected with the inner periphery of the flange (1), an extrusion hole (2b) is formed in the surface of the template (2), and the ceramic ring (3) is detachably arranged in the extrusion hole (2 b). Owing to set up the porcelain ring in the extrusion hole of template, this porcelain ring can protect the pore wall of extruding the hole to compare with traditional catalyst forming die, the catalyst granule of production is regular, and catalyst forming die's life is longer, and the porcelain ring can be dismantled again, therefore when the porcelain ring inner wall receives wearing and tearing, need not to change whole catalyst forming die, only need change the porcelain ring can, therefore can reduction in production cost by a wide margin.

Description

Catalyst forming die and bar extruding machine comprising same

Technical Field

The application relates to the field of catalyst preparation devices, in particular to a catalyst forming die for preparing an ethylbenzene dehydrogenation catalyst and a bar extruding machine comprising the catalyst forming die.

Background

The preparation process of the catalyst comprises the working procedures of material kneading, molding, drying, roasting and the like, wherein the molding is an important step of the preparation process of the industrial catalyst.

The catalyst is commonly used in the form of granules, strips, spheres and other shapes according to different requirements of the catalyst, wherein the strip catalyst is a type of industrial catalyst which is widely applied. The traditional preparation process of the strip catalyst is to extrude the kneaded material into a strip material through a strip extruding machine, and then prepare the final catalyst finished product through subsequent drying, roasting and other processes. The strip extrusion process usually adopts a single-screw horizontal strip extrusion machine which has the characteristics of high thrust and continuous discharging. The extrusion molding die used by the bar extruder is an integrated die plate, and a certain number of extrusion holes in a specified shape are formed in the die plate according to requirements.

However, in the actual production process, after a period of production, the inner wall of the extrusion hole is worn due to long-time contact with materials, so that the size of the extrusion hole is gradually increased and irregular, the size of the produced catalyst exceeds the index requirement, and the appearance of the catalyst is irregular. On the other hand, the abrasion of the holes also causes the pressure resistance of the whole template to be poor, and the template is easy to deform and even break after being used for a period of time. On the other hand, particularly in the production process of the ethylbenzene dehydrogenation catalyst, because the material components are mainly iron oxide, the requirement on the abrasion resistance of the mold is high, and the existing mold is scrapped after about 30 tons of products are produced, the service life of the mold is short, and the production cost of the whole catalyst preparation process is high.

Therefore, there is a need to provide a catalyst preparation device with long service life, high pressure and wear resistance, low production cost and regular catalyst particles.

Disclosure of Invention

The purpose of the application is to provide a catalyst preparation device which has long service life, high pressure resistance and wear resistance, low production cost and regular produced catalyst particles.

In order to achieve the above object, an aspect of the present application provides a catalyst molding die including a flange, a die plate, and a porcelain ring, an inner periphery of the flange and an outer periphery of the die plate being connected to each other, an extrusion hole being provided on a plate surface of the die plate, and the porcelain ring being detachably disposed in the extrusion hole.

Preferably, the porcelain ring is disposed within a partial length of the extrusion orifice.

Preferably, the material of the porcelain ring is zirconia.

Preferably, the outlet of the extrusion hole is in the shape of a circle, a clover or a plum blossom.

Preferably, the extrusion hole is plural.

Preferably, the number of the extrusion holes is 6-252.

Preferably, a plurality of said extrusion orifices are radially distributed on said die plate.

Preferably, the flange is circular, and the template is disc-shaped.

Preferably, the inner periphery of the flange is provided with a second connecting hole, the outer periphery of the template is provided with a third connecting hole, and the second connecting hole and the third connecting hole are butted in the axial direction and inserted with a bolt.

This application on the other hand provides a crowded strip machine, and this crowded strip machine includes the feed cylinder, crowded strip machine still includes the catalyst forming die that this application provided, catalyst forming die the periphery of flange connect in on the section of thick bamboo wall in the exit of feed cylinder.

Through above-mentioned technical scheme, owing to set up the porcelain ring in the extrusion hole of template, this porcelain ring can protect the pore wall of extruding the hole to compare with traditional catalyst forming die, the catalyst granule of production is regular, and catalyst forming die's life is longer, and the porcelain ring can dismantle again, therefore when the porcelain ring inner wall receives wearing and tearing, need not to change whole catalyst forming die, only need change the porcelain ring can, therefore can reduction in production cost by a wide margin.

Drawings

FIG. 1 is a cross-sectional view of a catalyst forming die provided herein;

FIG. 2 is a plan view of the construction of a flange of a catalyst forming die provided herein;

FIG. 3 is a cross-sectional view of a catalyst forming die provided herein after the flange is coupled to a die plate;

FIG. 4 is a plan view of the construction of the die plate of the catalyst forming die provided herein;

fig. 5 is a cross-sectional view of a catalyst forming mold provided in the present application, in which a ceramic ring is inserted into a mold plate.

Description of the reference numerals

1 Flange 1a first connection hole

1b second connecting hole 1c bolt

2 third connecting hole of template 2a

2b extrusion hole 3 ceramic ring

Detailed Description

The endpoints of the ranges and any values disclosed herein are not limited to the precise range or value, and such ranges or values should be understood to encompass values close to those ranges or values. For ranges of values, between the endpoints of each of the ranges and the individual points, and between the individual points may be combined with each other to give one or more new ranges of values, and these ranges of values should be considered as specifically disclosed herein.

Hereinafter, the catalyst forming die and the plodder including the same provided by the present application will be described in detail with reference to fig. 1 to 5.

First, the present application provides a catalyst molding die. As shown in fig. 1, the catalyst forming mold includes a flange 1, a template 2, and a porcelain ring 3.

The flange 1 serves as a connecting member, the inner periphery of the flange 1 and the outer periphery of the die plate 2 are connected to each other, and the outer periphery of the flange 1 is connected to a molding apparatus (e.g., a plodder), whereby the die plate 2 is connected to the molding apparatus through the flange 1 to enable extrusion molding.

As for the specific shape of the flange 1, the flange 1 may be a circular ring shape, the inner periphery of the flange 1 is a circular shape, and correspondingly, the template 2 may be formed in a circular disk shape, but is not limited thereto. The inner periphery of the flange 1 may be square or in other shapes, and the outer periphery of the formwork 2 may have a shape corresponding to the shape of the inner periphery of the flange 1, or the flange 1 and the formwork 2 may be connected by other members.

In the present application, as a preferred embodiment, the flange 1 is provided with a second coupling hole 1b on an inner periphery thereof, and the die plate 2 is provided with a third coupling hole 2a on an outer periphery thereof, and the second coupling hole 1b and the third coupling hole 2a are butted in an axial direction and inserted with a bolt 1 c. By this detachable manner, when the flange 1 or the die plate 2 needs to be replaced due to long-term use in the catalyst molding die, the parts can be easily replaced. This application has adopted bolted connection's detachable mode, but this application is not limited to this, also can be other detachable modes such as interference fit connection, magnetism connection.

The die plate 2 is used to extrude catalyst particles. Specifically, as shown in fig. 4, the plate surface of the die plate 2 is provided with extrusion holes 2b, and after the catalyst material passes through the extrusion holes 2b, the catalyst particles in a strip shape can be extruded.

Specifically, one or more extrusion holes 2b, preferably, a plurality of extrusion holes 2b may be provided on the plate surface of the die plate 2, thereby enabling a plurality of catalyst particles to be extruded simultaneously, relatively increasing the productivity of the catalyst particle product.

Although there is no particular limitation in the number of the extrusion holes 2b, it is preferable that the number of the extrusion holes 2b is 6 to 252 in consideration of the product quality of the catalyst particles.

In addition, the extrusion holes 2b are preferably uniformly distributed on the die plate 2 to improve the product quality. The form of the uniform distribution depends on the shape of the template 2 itself. In the present application, the die plate 2 takes the shape of a disk, and thus preferably, as shown in fig. 4, a plurality of extrusion holes 2b are radially distributed on the die plate 2.

The outlet shape of the extrusion hole 2b is preferably a circle, a clover or a quincunx in order to produce catalyst products of different shapes, but the present application is not limited thereto.

The porcelain ring 3 serves to protect the extrusion holes 2 b. Specifically, porcelain ring 3 detachably sets up in extruding hole 2b, because be provided with porcelain ring 3 in extruding hole 2b, consequently, extrude the inner wall of hole 2b and receive the protection of porcelain ring 3, even under the state that catalyst forming die plate used for a long time, the pore wall of extruding hole 2b also can keep good state, thereby compare with traditional catalyst forming die, the catalyst granule of catalyst forming die production through this application is regular, catalyst forming die's life is longer, and porcelain ring 3 can dismantle again, therefore when porcelain ring inner wall receives wearing and tearing, need not to change whole catalyst forming die, only need to change porcelain ring can, therefore can reduce manufacturing cost by a wide margin.

In addition, as a preferred embodiment, the porcelain ring 3 is provided in a partial length of the extrusion hole 2 b. Specifically, the porcelain ring 3 is inserted into the extrusion hole 2b from the inlet end (the inlet end and the outlet end are defined based on the flow direction of the material) of the extrusion hole 2b, and the front end of the porcelain ring 3 is less than the outlet end of the extrusion hole 2 b. This design is to form the catalyst material into a desired shape (for example, a circle, a clover shape or a quincunx shape) according to the shape of the outlet of the extrusion hole 2b when the catalyst material flows inside the porcelain ring 3 and is finally extruded from the extrusion hole 2 b.

As for the material of the porcelain ring 3, as long as the material can provide a passage for the feed material without affecting the quality of the catalyst material, it is preferable that zirconia be used as the material of the porcelain ring 3 in the present application.

Hereinafter, a plodder provided by the present application will be described. The extruding machine provided by the application comprises a charging barrel and the catalyst forming die provided by the application and described above, wherein the outer periphery of a flange 1 of the catalyst forming die is connected to the barrel wall at the outlet of the charging barrel, more specifically, a plurality of first connecting holes 1a are formed on the outer periphery of the flange 1, connecting holes are also formed on the barrel edge of the charging barrel, and after the first connecting holes 1a are butted with the connecting holes, the connection between the catalyst forming die and the charging barrel can be completed through bolt connection. Set up the catalyst forming die of this application in the exit of feed cylinder to the catalyst material is in the exit of feed cylinder when the extrusion hole 2b of template 2, earlier through the pore of porcelain ring 3, and the pore wall of extruding hole 2b receives the protection of porcelain ring 3 and can use for a long time, and after the catalyst material passed through the pore of porcelain ring 3, according to the exit shape of extruding hole 2b by extrusion moulding, forms the catalyst granule.

The preferred embodiments of the present application have been described above in detail, but the present application is not limited thereto. Within the scope of the technical idea of the present application, many simple modifications may be made to the technical solution of the present application, including combinations of various technical features in any other suitable manner, and these simple modifications and combinations should also be considered as the content disclosed in the present application, and all fall within the scope of the present application.

Claims

1. The catalyst forming die is characterized by comprising a flange (1), a template (2) and a ceramic ring (3), wherein the inner periphery of the flange (1) and the outer periphery of the template (2) are connected with each other, extrusion holes (2b) are formed in the surface of the template (2), and the ceramic ring (3) is detachably arranged in the extrusion holes (2 b).

2. Catalyst forming die according to claim 1, characterized in that the porcelain ring (3) is arranged within a partial length of the extrusion orifice (2 b).

3. The catalyst forming die according to claim 1, characterized in that the material of the porcelain ring (3) is zirconia.

4. The catalyst shaping die according to claim 1, wherein the outlet shape of the extrusion orifice (2b) is a circle, a clover or a quincunx.

5. The catalyst forming die according to claim 1, wherein the extrusion hole (2b) is plural.

6. The catalyst forming die according to claim 5, wherein the number of the extrusion holes (2b) is 6 to 252.

7. Catalyst forming die according to claim 5, characterized in that a plurality of extrusion orifices (2b) are distributed in a radial pattern on the die plate (2).

8. The catalyst forming die according to claim 1, wherein the flange (1) is circular and the die plate (2) is disc-shaped.

9. The catalyst forming die according to claim 8, wherein a second connecting hole (1b) is provided on an inner periphery of the flange (1), a third connecting hole (2a) is provided on an outer periphery of the die plate (2), and the second connecting hole (1b) and the third connecting hole (2a) are butted in an axial direction with a bolt (1c) inserted.

10. A rod extruder comprising a cartridge, characterized in that it further comprises a catalyst shaping die according to any one of claims 1 to 9, the outer periphery of the flange (1) of which is connected to the cartridge wall at the outlet of the cartridge.