CN204448028U - Catalyst carrier - Google Patents

Abstract

The utility model discloses a kind of catalyst carrier, described catalyst carrier is hollow three circle prisms, the cross section of hollow three circle prisms is three circle prismatics of hollow symmetry, cylindrical inscribe three symmetries of cross section to be Radius be R and radius are the inner circle of r, three inner circles are mutually circumscribed, and circle equal with inner circle radius with one, outside while of any two of three inner circles is tangent.

Description

Catalyst carrier

Technical field

It is hollow three circle prisms that the utility model relates to the shape of a kind of petrochemical industry catalyst carrier used, particularly shape, and axial centre has the catalyst carrier of through hole.

Background technology

Heterogeneous catalyst is prepared into definite shape usually, can meet the requirement of industrial production to aspects such as catalyst strength, pressure drop, mass transfer, fluid distrbution like this.Research shows, the catalyst that diameter is identical, is prepared into various shape and can changes the long-pending size of catalyst external surface.

The catalyst carrier of current petrochemical industry application shape has sheet, annular, spherical and other is irregularly shaped.These have difform catalyst carrier can both adsorption catalyst effectively.But the various shape catalyst carriers of prior art all come with some shortcomings part in course of reaction, as sheet and annular catalyst agent carrier rollability poor, not easily adsorb evenly with reactant, easily cause catalytic reaction inconsistent.Spherical carrier of catalyst rollability is good, and can load by Homogeneous phase mixing, but bed space is little, the resistance drop in catalytic reaction process increases very fast, is unfavorable for giving full play to the due catalytic action of catalyst.Also have spheric catalyst axle center place to offer axially extending bore in prior art, to improve bed voidage, but reactant is from appearance, and internally diffusion length difference is comparatively large everywhere, is unfavorable for the utilization rate improving catalyst.

Utility model content

Technical problem to be solved in the utility model is just to provide a kind of catalyst carrier, wherein, described catalyst carrier is hollow three circle prisms, the cross section of described hollow three circle prisms is three circle prismatics of hollow symmetry, cylindrical inscribe three symmetries of described cross section to be Radius be R and radius are the inner circle of r, three described inner circles are mutually circumscribed, and circle equal with the described radius r of described inner circle with one, outside while of any two of three described inner circles is tangent.

Above-mentioned catalyst carrier, wherein, the radius r of three described inner circles is identical.

Above-mentioned catalyst carrier, wherein, between two point of contacts of the circle that any two described inner circles are equal with described inner circle radius with one, described outside, arc angle is 60 °.

Above-mentioned catalyst carrier, wherein, the axial centre of described catalyst carrier is provided with the through hole that an aperture is r1.

Above-mentioned catalyst carrier, wherein, the scope of described exradius R is 0.5 ~ 6mm.

Above-mentioned catalyst carrier, wherein, described inner circle radius r is:

Above-mentioned catalyst carrier, wherein, the aperture r1 of described through hole is: r1=0.6r.

Above-mentioned catalyst carrier, wherein, the axial length L of described catalyst carrier is 2 ~ 10 times of described exradius R.

In sum, the utility model is relative to its beneficial effect of prior art, there is the advantage that outer surface is large, voidage is high, diffusion long-range is short, bulk density is low, intensity is good, hollow three circle prismatic catalyst carriers significantly increase surface area and the voidage of catalyst carrier, the flow resistance of reactant in beds is reduced, reduce the possibility of coking carbon deposit, improve reaction efficiency and the utilization rate of catalyst.

Below in conjunction with drawings and Examples, the utility model is described further.

Accompanying drawing explanation

Fig. 1 is the cross-sectional structure figure of the hollow three circle prism catalyst carriers of the utility model;

Fig. 2 is the cross sectional representation of the hollow three circle prism catalyst carriers of the utility model;

Fig. 3 is the hollow three circle prism catalyst support structures figure of the utility model.

Wherein, Reference numeral

R: exradius

R: inner circle radius

R1: through-hole aperture

L: axial length

θ: arc angle

1: cylindrical

2: inner circle

3: through hole

Detailed description of the invention

Below in conjunction with the drawings and specific embodiments, technical solutions of the utility model are described in detail, further to understand the purpose of this utility model, scheme and effect, but and are not used to limit the utility model.

Please refer to Fig. 1 and Fig. 2, Fig. 1 is the cross-sectional structure figure of the hollow three circle prism catalyst carriers of the utility model; Fig. 2 is the cross sectional representation of the hollow three circle prism catalyst carriers of the utility model.As shown in Figures 1 and 2, catalyst carrier is hollow three circle prisms, the cross section of hollow three circle prisms is three circle prismatics of hollow symmetry, cylindrical 1 inscribe three symmetries of cross section to be Radius be R and radius are the inner circle 2 of r, three inner circles 2 are mutually circumscribed, and circle equal with described inner circle radius with one, outside while of any two of three inner circles 2 is tangent.

Wherein, the axial centre of catalyst carrier is provided with the through hole 3 that an aperture is r1; The scope of exradius R is 0.5 ~ 6mm; The radius r of three inner circles 2 is identical, and inner circle radius r is: the aperture r1 of through hole 3 is: r1=0.6r; Between two point of contacts of the circle that any two inner circles 2 are equal with inner circle 2 radius r with one, outside, arc angle θ is 60 °.

Please refer to Fig. 3, Fig. 3 is the hollow three circle prism catalyst support structures figure of the utility model.As shown in Figure 3, the axial length L of hollow three circle prism catalyst carriers is 2 ~ 10 times of exradius R.

Under normal temperature, aluminium oxide dry powder is mixed by a certain percentage with extrusion aid, peptizing agent, binding agent.Then according to Fig. 1, make orifice plate, extruded moulding on banded extruder, obtains catalyst carrier.Through 120 DEG C of dryings, 550 DEG C of roastings, obtain finished product carrier.Then the bulk density of catalyst carrier, voidage is measured.

Mensuration obtains catalyst carrier bulk density 0.49g/ml, voidage 42%, and this bulk density is less than 4% of the catalyst carrier bulk density not arranging through hole.

Certainly; the utility model also can have other various embodiments; when not deviating from the utility model spirit and essence thereof; those of ordinary skill in the art are when making various corresponding change and distortion according to the utility model, but these change accordingly and are out of shape the protection domain that all should belong to the claim appended by the utility model.

Claims (8)

1. a catalyst carrier, it is characterized in that, described catalyst carrier is hollow three circle prisms, the cross section of described hollow three circle prisms is three circle prismatics of hollow symmetry, cylindrical inscribe three symmetries of described cross section to be Radius be R and radius are the inner circle of r, three described inner circles are mutually circumscribed, and circle equal with the described radius r of described inner circle with one, outside while of any two of three described inner circles is tangent.

2. catalyst carrier as claimed in claim 1, it is characterized in that, the radius r of three described inner circles is identical.

3. catalyst carrier as claimed in claim 1, it is characterized in that, between two point of contacts of the circle that any two described inner circles are equal with described inner circle radius with one, described outside, arc angle is 60 °.

4. catalyst carrier as claimed in claim 1, it is characterized in that, the axial centre of described catalyst carrier is provided with the through hole that an aperture is r1.

5. catalyst carrier as claimed in claim 1, it is characterized in that, the scope of described exradius R is 0.5 ~ 6mm.

6. catalyst carrier as claimed in claim 2, it is characterized in that, described inner circle radius r is: $r=3/(3+2\sqrt{3})R.$

7. catalyst carrier as claimed in claim 4, it is characterized in that, the aperture r1 of described through hole is: r1=0.6r.

8. catalyst carrier as claimed in claim 1, it is characterized in that, the axial length L of described catalyst carrier is 2 ~ 10 times of described exradius R.