JP3252165B2 - Exhaust gas treatment equipment - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a device for treating engine exhaust gas and the like.

[0002]

2. Description of the Related Art For example, a denitration and dedusting apparatus for removing nitrogen oxides (NOx) and dust contained in exhaust gas of a diesel engine is known. This denitration apparatus is an apparatus that passes exhaust gas through a catalyst packed bed and removes NOx by a catalytic reaction. As this type of denitration apparatus, a fixed bed reactor and a fluidized bed reactor in a gravitational field are known. (See, for example, JP-A-52-131970)

[0003] In the former fixed bed reactor, dust contained in exhaust gas causes clogging of the reactor, which significantly impairs the treatment efficiency. In the case where the catalyst is deteriorated, it is necessary to replace the catalyst during operation. There are issues such as inability to do so.

The latter fluidized bed reactor in a gravitational field has a disadvantage that it cannot cope with a change in the amount of exhaust gas due to a change in engine load. Since the area of the device must be increased, there is a problem that the device becomes larger.

An object of the present invention is to use a fluidized bed reactor as a centrifugal fluidized bed to obtain a large fluidizing gas linear velocity, increase the amount of exhaust gas treatment, and reduce the size of the entire apparatus. Is to provide.

[0006]

An object of the present invention is to provide an engine exhaust system.
A cylindrical dispersion plate is provided in the outer cylinder for introducing the gas to be treated.
And a cylindrical shape with an exhaust pipe along the central axis of this dispersion plate
A fluidized bed reactor with a structure that can be driven to rotate
Place a cylindrical filter in the center of the
Of exhaust gas containing catalyst in the cavity between the heater and the dispersion plate
In the apparatus, the front shape is a ring inside the fluidized bed reactor.
Multiple rectifying plates with multiple radial connecting plates
By connecting the filter to the outside of each current plate.
Is achieved.

[0007]

BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a vertical sectional front view, and FIG. 2 is a sectional view taken along line BB of FIG.
FIG.

The structure of the embodiment shown in FIGS . 1 and 2 will be described . Reference numeral 31 denotes a fluidized bed having a cylindrical structure in which a cylindrical surface is formed as a dispersion plate 31a and end plates 31b and 31c are connected to both sides thereof. Reactor.

[0009] Rectification to the free board part of the fluidized bed reactor 31
FIG. 1 shows a device provided with a plate 32, and the rectifying plate 32
The pressure loss is reduced. Its composition
Is a combination of a straightening plate 32 having a ring-shaped front shape at appropriate intervals.
Several rectifying plates 32 are provided by radial connecting plates 33.
Let me concatenate. In the figure, 34 is a filter, 35 is exhaust.
Tube.

By selecting a catalyst, it is possible to carry out decomposition chemical reactions such as denitration, desulfurization and desalination as well as dedusting.
Its field of use is wide.

[0011]

According to the configuration of the present invention as described above,
The following effects can be obtained. (A) The fluidized bed reactor can be rotated in the atmosphere of the engine exhaust gas, so that the fluidized bed can be a centrifugal fluidized bed. Therefore, the fluidized gas linear velocity is larger than that of a conventional fluidized bed in a gravitational field. Since the amount of exhaust gas can be increased, the entire apparatus can be reduced in size and can be mounted on an automobile or the like, and the pollution problem caused by exhaust gas can be rationally solved. (B) By using the rotational power of the engine as the drive source before the fluidized bed reaction, the amount of exhaust gas corresponding to the engine speed can be efficiently processed. ( C ) The pressure loss of the device can be reduced by the current plate.

[Brief description of the drawings]

FIG. 1 is a vertical sectional front view of the device of the present invention .

It is a cross-sectional view of FIG. 1. FIG line B-B.

[Explanation of symbols]

 31 Fluidized bed reactor 32 Straightening plate 33 Ring type straightening plate 34 Filter 35 Exhaust pipe

──────────────────────────────────────────────────続 き Continued on the front page (72) Inventor Atsushi Tsutsumi 1-2-4 Misato, Misato-shi, Saitama 1002-room Misato Sky Mansion (72) Inventor Yasushi Sakakida 1-1-1, Kawasaki-cho, Akashi Kawasaki Heavy Industries, Ltd. Inside the plant (72) Inventor Kazuo Tsutsumi 1-1, Kawasaki-cho, Akashi-shi Kawasaki Heavy Industries, Ltd. Inside the Akashi Plant (72) Inventor Tomoaki Takada 1-1-1, Kawasaki-cho, Akashi-shi, Kawasaki Heavy Industries, Ltd. Inside the Akashi Plant (56) References Japanese Utility Model 1983-108132 (JP, U) (58) Fields investigated (Int. Cl. ⁷ , DB name) B01D 53 / 86,53 / 94 B01J 21/00-38/74 F01N 3/10

Claims (1)

(57) [Claims] 1. An outer cylinder for introducing a gas to be treated of an engine exhaust gas.
Inside, there is a cylindrical dispersion plate, with the central axis of this dispersion plate
Rotating a cylindrical fluidized bed reactor with a curved exhaust pipe
And a cylindrical filter in the center of the fluidized bed reactor.
And a catalyst in the cavity between the filter and the dispersion plate.
In a treatment device for exhaust gas or the like containing
In the reactor, a plurality of straightening plates with a ring-shaped front
Connected by radial connection plates,
Exhaust gas treatment equipment characterized by having a filter
Place.