CN211436224U

CN211436224U - Hollow cylinder structure of catalyst carrier

Info

Publication number: CN211436224U
Application number: CN201920859250.9U
Authority: CN
Inventors: 周彦斌
Original assignee: Shenzhen Czct Technology Co ltd
Current assignee: Shenzhen Czct Technology Co ltd
Priority date: 2019-06-08
Filing date: 2019-06-08
Publication date: 2020-09-08
Anticipated expiration: 2029-06-08

Abstract

The utility model provides a hollow cylinder structure of catalyst carrier, this cylinder structure are integrated into one piece structure, and the cross-section of this cylinder structure is positive pentagon or positive pentagon star, and the inside axial direction of cylinder structure is provided with a hollow through-hole, hollow through-hole axial and radial equal symmetry. The utility model discloses owing to and the inside of this cylinder structure is equipped with a hollow through-hole, adopt hollow structure not only greatly reduced gaseous windage, this hollow through-hole structure makes the gaseous catalytic performance that can freely pierce through, reinforcing to the VOCs gas moreover.

Description

Hollow cylinder structure of catalyst carrier

Technical Field

The utility model relates to an industrial organic waste gas handles the field, relates to a hollow cylinder structure of catalyst carrier, especially relates to a hollow cylinder structure of catalyst carrier.

Background

The discharge amount of Volatile Organic Compounds (VOCs) in China is quite remarkable. Limited to technical process or production costs, VOCs are primarily direct emissions. Numerous studies have shown that VOCs are both precursors to photochemical ozone and important precursors to PM2.5, and photochemical ozone and PM2.5 are the most prominent air quality issues we face currently and in the future. In addition, some highly toxic VOCs attach to PM2.5 fine particles, significantly increasing the threat of atmospheric particulates to human health. Therefore, the effective emission reduction of the VOCs is an important link for treating the atmospheric pollution. Practice shows that the advantages of catalytic combustion are particularly prominent in a plurality of VOCs treatment methods. The method is suitable for treating the organic waste gas with large concentration change and complex components, and has the advantages of high removal efficiency, low energy consumption, no secondary pollution and the like. The catalyst is the key point of the application of the catalytic combustion method. Common VOCs catalysts include noble metal catalysts (e.g., Pt, Ru, Au, Rh, etc.) and transition metal oxide catalysts (e.g., V, Cr, Mn, Fe, Co, Ni, etc. transition metal oxides or complex oxides) formed by compounding a catalytic activator, a binder, and water into a carrier in a ratio. In the prior art, the catalyst carrier is mainly spherical or cylindrical, and the catalyst carrier has the problems of small specific surface area and large wind resistance, thereby causing low catalytic activity, so that a catalyst carrier with a hollow cylinder structure is needed.

SUMMERY OF THE UTILITY MODEL

The utility model aims at providing a hollow cylinder structure of catalyst carrier, this catalyst carrier specific surface area is big, the windage is little to prior art not enough.

In order to achieve the above purpose, the utility model adopts the following technical scheme:

the utility model provides a hollow cylinder structure of catalyst carrier, this cylinder structure is integrated into one piece structure, and the cross-section of this cylinder structure is regular pentagon or regular pentagon star, and the inside axial direction of cylinder structure is provided with a hollow through-hole, hollow through-hole axial and radial equal symmetry.

Wherein, the cross-section of the hollow through hole is circular.

The axial length of the column structure is 40-50 mm.

When the cross section of the cylinder structure is a regular pentagon, the side length of the regular pentagon is 20-22 mm, and the diameter of the hollow through hole is 7-8 mm.

When the cross section of the column structure is in a regular pentagram shape, the lengths of straight lines of two adjacent corners are 20-22 mm, and the diameter of the hollow through hole is 5-6 mm.

Wherein, the catalyst carrier is a hollow cylinder structure formed by integrally molding a ceramic carrier or a hard fiber material.

The utility model discloses following beneficial effect has: the catalyst carrier of the utility model adopts an integrally formed hollow cylinder structure, and because the cylinder structure is internally provided with a hollow through hole, the wind resistance of the gas is greatly reduced by adopting the hollow structure, and the VOCs gas can freely penetrate through the hollow through hole structure, so that the catalytic performance of the VOCs gas is enhanced; in addition, the outer surface is regular pentagon or regular pentagon star, so that the specific surface area of the catalyst can reach 100-200 m²G, thus making the external specific surface area large.

Drawings

FIG. 1 is a schematic structural diagram of a regular pentagonal VOCs catalyst carrier with a hollow cylinder structure;

FIG. 2 is a schematic cross-sectional view of a pentagonal VOCs catalyst carrier with a hollow cylinder structure;

FIG. 3 is a schematic diagram of a VOCs catalyst support having a hollow cylindrical structure in a regular pentagonal star shape;

FIG. 4 is a schematic cross-sectional view of a VOCs catalyst support having a hollow cylindrical structure in a regular pentagonal star shape;

reference is made to the accompanying drawings in which: a 1-the side length of the regular pentagon of the catalyst section; a 2-the straight line distance between two adjacent angles of the catalyst cross section regular pentagram; d 1-diameter of hollow through hole in catalyst section; d 2-diameter of hollow through hole in catalyst section; l1-axial length of the regular pentagon VOCs catalyst carrier with hollow cylinder structure; l2-axial length of VOCs catalyst support with a hollow cylinder structure in a regular pentagonal star shape.

Detailed Description

In order to make the present invention clearer, the present invention will be further described with reference to the accompanying drawings and specific embodiments.

In this embodiment, the cross section of the hollow through hole is circular. The axial length of the cylinder structure is 40-50 mm.

In the embodiment, when the cross section of the cylinder structure is a regular pentagon, the side length of the regular pentagon is 20-22 mm, and the diameter of the hollow through hole is 7-8 mm; when the cross section of the cylinder structure is in a regular pentagram shape, the lengths of straight lines of two adjacent corners are 20-22 mm, and the diameter of the hollow through hole is 5-6 mm.

In this embodiment, the catalyst carrier is a ceramic carrier or a hard fiber material integrally formed to form a hollow cylinder structure.

Compared with the prior art, the hollow cylinder structure of the catalyst carrier provided by the utility model has the advantages that the hollow through hole is arranged inside the cylinder structure, so that the wind resistance of the gas is greatly reduced by adopting the hollow structure, and the VOCs gas can freely penetrate through the hollow through hole structure, so that the catalytic performance of the VOCs gas is enhanced; in addition, the outer surface is regular pentagon or regular pentagon star, so that the specific surface area of the catalyst can reach 100-200 m²(ii)/g, thus making the external specific surface area large; simultaneously, the catalyst carrier of the utility model adopts an integrated forming method to simplify the process compared with the multiple loading process which is mature in industry.

Example 1

The regular pentagon shown in fig. 1 and fig. 2 has a VOCs catalyst carrier with a hollow cylinder structure, the catalyst carrier is of a cylinder structure, the cross section of the catalyst carrier is of a regular pentagon, the side length a1 of the catalyst carrier is 21mm, the axial length L1 of the catalyst carrier is 45mm, a circular hollow through hole is arranged inside the catalyst carrier, the diameter d1 of the hollow through hole is 8mm, and the hollow through hole penetrates through the whole catalyst carrier. In this example, the catalyst carrier was a ceramic carrier, the catalytic activator was Mn metal oxide, and the binder was γ -Al₂O₃And (2) sol, compounding a catalytic active agent, a binder and water into a carrier to obtain the VOCs catalyst, wherein the carrier, a plurality of catalytic active agents, the binder and the water are compounded according to the mass ratio of 10:5:1:1 and then extruded to be integrally formed.The compositions herein are not improvements in the art and are conventional in the current market.

Example 2

The regular pentagram shown in fig. 3 and 4 is a VOCs catalyst carrier with a hollow cylinder structure, the catalyst carrier is in a cylinder structure, the cross section of the catalyst carrier is in a regular pentagram shape, the straight lengths a2 of two adjacent corners of the catalyst carrier are 21mm, the axial length L2 of the catalyst carrier is 45mm, a circular hollow through hole is formed in the catalyst carrier, the diameter d2 of the hollow through hole is 5mm, and the hollow through hole penetrates through the whole catalyst carrier. In this example, the carrier used in the catalyst was a ceramic carrier, the catalytic activator was Mn metal oxide, and the binder was γ -Al₂O₃And (2) sol, compounding a catalytic active agent, a binder and water into a carrier to obtain the VOCs catalyst, wherein the carrier, a plurality of catalytic active agents, the binder and the water are compounded according to the mass ratio of 10:5:1:1 and then extruded to be integrally formed. The compositions herein are not improvements in the art and are conventional in the current market.

In the above embodiment, the utility model discloses catalyst carrier has great specific surface area and has reduced the bulk density of catalyst and catalyst still has enough big mechanical strength, can be better satisfy the operation requirement of industry VOCs waste gas to catalyst high specific surface area and mechanical strength.

Table 1 shows the comparison of the catalytic effect of the catalyst of example 1 with the hollow cylinder structure and the catalyst of the control group on different VOCs under the same test conditions:

TABLE 1

Note: the control group of the experiment adopts CG-II type catalysis of Hengrong environmental protection science and technology Limited in Zhejiang. T99: the temperature at which the catalytic treatment efficiency reaches 99%. And (3) testing conditions are as follows: airspeed of 15000h^-1(ii) a The dosage of the catalyst is as follows: 5g of the total weight.

As can be seen from Table 1, the catalyst with the hollow cylinder structure of the utility model is more favorable for the catalytic reaction of VOCs gas.

The utility model discloses a two kinds of hollow cylindricality structures have improved specific surface area through hollow pore structural design, and then have improved the catalyst and have obtained better performance to VOCs's throughput. The catalyst is suitable for treating VOCs gases such as benzene, esters, organic acids, alcohols and the like in industrial production.

The above disclosure is only for the specific embodiments of the present invention, but the present invention is not limited thereto, and any changes that can be considered by those skilled in the art should fall within the protection scope of the present invention.

Claims

1. The hollow cylinder structure of the catalyst carrier is characterized in that the cylinder structure is of an integrally formed structure, the cross section of the cylinder structure is regular pentagon or regular pentagon star, a hollow through hole is formed in the cylinder structure in the axial direction, and the hollow through hole is symmetrical in the axial direction and the radial direction.

2. The hollow cylindrical structure of a catalyst carrier according to claim 1, wherein the cross section of the hollow through-hole is circular.

3. The hollow cylindrical structure of a catalyst carrier according to claim 2, wherein the cylindrical structure has an axial length of 40 to 50 mm.

4. The hollow cylinder structure of a catalyst carrier according to claim 3, wherein when the cylinder structure has a cross section of a regular pentagon, the side length of the regular pentagon is 20 to 22mm, and the diameter of the hollow through hole is 7 to 8 mm.

5. The hollow cylindrical structure of a catalyst carrier according to claim 3, wherein when the cross section of the cylindrical structure is a regular pentagon, the length of the straight line at two adjacent corners is 20 to 22mm, and the diameter of the hollow through hole is 5 to 6 mm.

6. The hollow cylindrical structure of a catalyst carrier according to claim 1, wherein the catalyst carrier is a ceramic carrier or a hard fiber material integrally molded to form a hollow cylindrical structure.