JPH06248940A - Three-way catalyst container device - Google Patents

Abstract

PURPOSE:To provide a device for improving a purification ratio and sharply prolong the life of a catalyst, by providing a rotary vane for uniforming flow velocity in a three-way catalyst container for purifying exhaust gas of a gas engine and the like. CONSTITUTION:A rotary vane 4, for uniforming concentration distribution in exhaust gas and flow velocity in a catalyst container, is provided before a three-way catalyst container provided in an exhaust gas flow pipe 1. The exhaust gas, flowed in the exhaust gas flow pipe, is introduced into the rotary vane 4 before entering the catalyst 2, and is furnished with rotation force there to expandingly reach a catalyst layer in the catalyst container 2 while excellently mixing, that is, uniforming concentration. Since the exhaust gas is thus introduced into the catalyst layer while realizing the uniformity of concentration distribution and flow velocity, purification performance is sufficiently exhibited. Consequently, a catalyst is utilized averagely to display excellent effects of improving a purification ratio and sharply prolonging the life of the catalyst.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a three-way catalyst container device for purifying exhaust gas from a gas engine or the like.

[0002]

2. Description of the Related Art A three-way catalyst container has a tapered shape of 30 to 80 degrees as shown in FIG. 1 in order to increase the contact area with exhaust gas. Despite this taper shape, the flow of exhaust gas is biased toward the center of the catalyst and the purification performance seen from the amount of catalyst is not exerted, which shortens the life of the catalyst.

[0003]

In order to solve the above problems, a diffusion plate is conventionally attached to the front surface of the catalyst.
Such a diffusion plate is effective in mixing the exhaust gas and making the concentration distribution in the exhaust gas uniform, but the uniformity of the velocity distribution in the catalyst container has not been achieved, and the above-mentioned drift tendency is It is in an unsolved state.

[0004]

In order to solve the above-mentioned problems, the present invention provides a three-way catalyst container provided in an exhaust gas flow pipe to make the concentration distribution in exhaust gas uniform and The present invention is characterized in that a swirl vane is provided to make the flow velocity in the container uniform.

Further, the present invention is characterized in that the swirl vane has a four-split vane structure.

[0006]

[Function] Exhaust gas flowing through the exhaust gas flow pipe is introduced into the swirl vane before entering the catalyst container, and swirl force is applied there to expand the gas while mixing well, that is, making the concentration uniform. While reaching the catalyst layer in the catalyst container. In this way, since the exhaust gas is introduced into the catalyst layer while achieving the uniform concentration distribution and the uniform flow velocity distribution, the purification performance is fully exerted.

[0007]

EXAMPLES Reference numeral 1 is an exhaust gas flow pipe, 2 is a three-way catalyst container provided in the exhaust gas flow pipe 1, and 3 is a catalyst layer filled in the container 1. A swirl vane 4 is provided in front of the three-way catalyst container 1 to make the concentration distribution in the exhaust gas uniform and to make the flow velocity in the catalyst container 2 uniform. In the swirl vane 4, the configuration of the four-split vane is suitable for good mixing and uniform flow velocity.

With this structure, the exhaust gas flowing through the exhaust gas flow pipe 1 is introduced into the swirl vanes 4 before entering the catalyst container 2, where swirl force is applied to the swirl vanes 4 while mixing well. That is, it reaches the catalyst layer 3 in the catalyst container 2 while expanding while making the concentration uniform. In this way, since the exhaust gas is introduced into the catalyst layer while achieving the uniform concentration distribution and the uniform flow velocity distribution, the purification performance is fully exhibited in the catalyst layer 3.

[0009]

As described above, according to the present invention, the concentration distribution in the exhaust gas can be made uniform and the flow velocity distribution in the catalyst container can be made uniform. Therefore, there is an excellent effect that the purification rate is improved and the life of the catalyst is greatly extended.

[Brief description of drawings]

 FIG. 1 is a systematic description of the invention. FIG. 2 is an enlarged view of a main part of the present invention.

[Explanation of symbols]

 1 Exhaust gas flow pipe 2 Three-way catalyst container 3 Catalyst layer 4 Swirling blade

Claims (2)

[Claims] 1. A swirl vane is provided in front of a three-way catalyst container provided in an exhaust gas flow pipe to make the concentration distribution in the exhaust gas uniform and to make the flow velocity in the catalyst container uniform. A three-way catalyst container device characterized by the above. 2. The three-way catalyst container device according to claim 1, wherein the swirl vane has a four-split vane structure.