CN2518586Y

CN2518586Y - Catalyst carrier

Info

Publication number: CN2518586Y
Application number: CN 01256932
Authority: CN
Inventors: 伍本银; 周丰亨
Original assignee: Individual
Current assignee: Individual
Priority date: 2001-12-14
Filing date: 2001-12-14
Publication date: 2002-10-30
Anticipated expiration: 2011-12-14

Abstract

A novel catalyst carrier comprises a multi-porous ceramic profiled sphere body. The sphere body has a through hole, two ends of which have at least two slots opening along the axial translocation direction; the exterior of the sphere body is wrapped with a metal-wire screen, which adopts seam-welding allowing the upper and the lower bodies and forms a welded periphery; the pore wall of the through hole is designed into a tooth-shaped or concave-convex surface to give the carrier a large specific surface area. In addition, a structure for preventing friction and collision between sphere bodies is additionally arranged to reduce fractures caused by mechanical shakes and improve the mechanical durability of the carrier.

Description

A kind of novel catalyst carrier

Technical field

The utility model belongs to the catalyst carrier technical field, is specifically related to a kind of novel catalyst carrier that is used in automobile, the motorcycle tail gas cleaning silencer that has.

Technical background

Vehicle catalytic converter is to reduce the most effective device of motor vehicle exhaust emission, and carrier is the important component part of catalyst converter, and its performance directly influences the performance and the durability of catalytic converter.The operating ambient temperature of carrier is generally-10C～+ 40C, operating temperature is normal temperature～1000C, bears high temperature for a long time, mechanical oscillation and thermal shock etc. require carrier to have good catalytic conversion efficient and durability.In the carrier that the Vehicular exhaust catalytic cleaner adopts, what be used widely at present is ceramic monolith, and the shape of ceramic monolith has graininess and monolithic devices.Pelleted substrate is mainly sphere, in China utilization early, but has a fatal defective, and promptly thermal capacity is big, and vapour lock is big, causes catalytic conversion lower, is that the catalyst of carrier is very short service life with it.In the prior art, have the spherical ceramic carrier structure is improved, as on spheroid, opening one or parallel a plurality of through holes, or leave groove, its objective is, improve catalytic conversion in order to increase specific area at the spheroid outer wall.But load because this class carrier is the accumulation formula, through hole on the spheroid or groove are easily stopped up mutually, do not reach the purpose that increases specific area.

At the above-mentioned defective that prior art exists, the purpose of this utility model is to propose a kind of catalyst carrier, and it has special-shaped surfaces externally and internally, has increased the specific area of carrier; In addition, it has also designed between anti-spheroid friction and has dashed the structure of rushing, reduce its because of mechanical shock cause cracked, improve its mechanical endurance.

Summary of the invention

A kind of novel catalyst carrier comprises activated alumina multi-microporous ceramic abnormity spheroid, and spheroid has a through hole, and the through hole two ends have at least two grooves along the axis direction of index.

Described spheroid is wrapped with woven wire.Woven wire adopts upper and lower body to contain the seam weldering, forms welded perimeter.

The hole wall of described through hole is designed to toothed surfaces or concavo-convex surface, and ceramic monolith has roughened surface.

The utility model has the advantages that:

1. this carrier is except having through hole, also have a plurality of grooves along the axis direction of index, and be designed to dentation or concavo-convex surface at inwall, make inwall form crest and trough, increased the specific area of carrier effectively, the activity of such catalysts composition is fully contacted with waste gas, obtain higher waste gas purification rate, the thermal capacity of carrier becomes littler simultaneously.

2. the fluting of this carrier design makes it have gas channel on a plurality of directions, and the through hole of carrier can not stopped up mutually, reduces vapour lock.

3. the woven wire of this carrier design contains the seam welding structure, and carrier is being concentrated when packing catalyst chamber into, the interlock mutually of the welded perimeter of carrier, and have micro-elasticity, increased the wearability and the vibration resistance of carrier.The material of woven wire selection simultaneously and specification are selected can play good regulating action to the thermal capacity of carrier.

Through experiment, adopt this carrier structure, be equipped with corresponding catalyst, its catalyticing purifying effect can reach the Europe superscript standard, and be that existing capital mark is more than 5 times service life.

Description of drawings

Fig. 1 is the structure chart of this catalyst carrier;

Fig. 2 is the A-A cutaway view of Fig. 1;

The specific embodiment

Referring to Fig. 1 and Fig. 2, this catalyst carrier comprises activated alumina spherical ceramic carrier 1 and its outer woven wire 2, and the center of spherical ceramic carrier 1 has through hole 3, and through hole 3 two ends have totally 8 grooves 4 along the axis direction of index, they are dislocatedly distributed at through hole 3 two ends, to be more conducive to gas flow.The inwall of through hole 3 has plurality of tooth-shaped groove 5, makes inwall form crest and trough.Spherical ceramic carrier 1 surface adopts special process with it roughening.Spherical ceramic carrier 1 woven wire 2 adopts upper and lower body to contain the seam weldering, forms welded perimeter 6, is beneficial to increase the wearability and the vibration resistance of carrier.

Claims

1. a novel catalyst carrier comprises multi-microporous ceramic abnormity spheroid, and spheroid has a through hole, it is characterized in that the through hole two ends have at least two grooves along the axis direction of index.

2. novel catalyst carrier according to claim 1 is characterized in that spheroid is wrapped with woven wire.

3. novel catalyst carrier according to claim 2 is characterized in that woven wire adopts upper and lower body to contain the seam weldering, forms welded perimeter.

4. according to any described novel catalyst carrier of claim 1-3, it is characterized in that the hole wall of through hole is designed to toothed surfaces or concavo-convex surface, ceramic monolith has roughened surface.

5. novel catalyst carrier according to claim 4 is characterized in that the groove number that the through hole two ends are opened is 2-8.

6. novel catalyst carrier according to claim 5, it is characterized in that through hole up and down the groove at two ends be dislocatedly distributed.

7. novel catalyst carrier according to claim 6, the size that it is characterized in that carrier becomes according to the silencer of adapted with it, and its span is: external diameter (S) is the 4-10 millimeter, and aperture (φ) is the 1-7 millimeter, groove width (a) is the 1-4 millimeter, and groove depth (b) is 1.The 5-4 millimeter.