CN210118186U

CN210118186U - Environment-friendly automobile exhaust treatment device

Info

Publication number: CN210118186U
Application number: CN201920764562.1U
Authority: CN
Inventors: 阎柄辰
Original assignee: Individual
Current assignee: Individual
Priority date: 2019-05-24
Filing date: 2019-05-24
Publication date: 2020-02-28
Anticipated expiration: 2029-05-24

Abstract

The utility model belongs to the automobile exhaust handles field, concretely relates to environmental protection automobile exhaust processing apparatus. One end of the air inlet pipe is provided with an air inlet pipe, the air inlet pipe is detachably connected with an automobile exhaust pipe, the other end of the air inlet pipe is connected with a silencer through a cooling pipe, the silencer is connected with an inlet of a catalytic device, two groups of partition plates are sequentially arranged in the catalytic device from the inlet to the outlet, each group of partition plates consists of two opposite net-shaped partition plates, a cavity is formed between the two net-shaped partition plates, a group of partition plate cavities close to the inlet are filled with a copper oxide loaded HZSM-5 mesoporous molecular sieve catalyst, and a group of partition plate cavities close to the; the outlet of the catalytic device is connected with activated carbon adsorption equipment, activated carbon is placed in the catalytic device, and an outlet pipe is arranged at the outlet of the activated carbon adsorption equipment. The utility model discloses simple structure, catalyst activity is high, long service life, and automobile exhaust emission to reach standard, noise reduction, long service life.

Description

Environment-friendly automobile exhaust treatment device

Technical Field

The utility model belongs to the automobile exhaust handles field, concretely relates to environmental protection automobile exhaust processing apparatus.

Background

The automobile exhaust is exhaust gas generated when an automobile is used, has serious pollution to the environment and health hazards to urban residents, and contains hundreds of different compounds, wherein the pollutants comprise solid suspended particles, carbon monoxide, hydrocarbon, nitric oxide, carbon particles PM2.5, a small amount of lead compounds, sulfide and the like.

The treatment or control of automobile exhaust emission has become a major issue to be solved urgently in the field of environmental protection all over the world. Generally, there are two methods for purifying automobile exhaust: the internal control of the engine and the external purification of the engine, the internal control is to reduce the pollutants discharged by the automobile by utilizing the working process of the engine, automobile manufacturers in various countries in the world respectively adopt a plurality of measures on the aspects of a carburetor and the engine, such as an electric control fuel injection technology, an oxygen sensor control technology and the like, all the measures have certain effects on reducing the pollutants discharged by the automobile, but the effects are limited, and even some of the measures can bring some adverse effects on the dynamic property and the economical property of the engine.

The three-way catalyst is a commonly used catalyst for treating automobile exhaust, a honeycomb-shaped ceramic or metal carrier and a catalyst coating attached on the carrier. The carrier is generally made of alumina, and has a spherical, polygonal, etc. shape, the catalystTypically platinum, rhodium, palladium. When high-temperature automobile exhaust passes through the purification device, the purifying agent in the three-way catalyst enhances the activity of three gases of CO, HC and NOx to promote the three gases to carry out certain oxidation-reduction chemical reaction, wherein CO is oxidized into colorless and nontoxic carbon dioxide gas at high temperature; oxidation of hydrocarbons to water (H) at high temperatures₂O) and carbon dioxide; NO_xReducing the nitrogen and the oxygen to purify the automobile exhaust.

However, the conventional three-way catalyst is easy to deactivate, and after the three-way catalyst is deactivated, the tail gas treatment device needs to be detached, and the three-way catalyst needs to be taken out for regeneration. So that the three-way catalyst has short service life and high cost.

Disclosure of Invention

Not enough to prior art, the utility model aims at providing an environmental protection automobile exhaust processing apparatus, the low price, catalytic activity is high, can show the cost that reduces the harmful emissions of automobile exhaust, and oil mist, peculiar smell are got rid of to the noise reduction, long service life.

The utility model discloses an environmental protection automobile exhaust processing apparatus, one end is equipped with the intake pipe, intake pipe and automobile exhaust pipe can dismantle and be connected, the intake pipe other end passes through the cooling tube and connects the silencer, the silencer is connected the catalytic unit import, catalytic unit is inside to be equipped with two sets of baffles by import to export in proper order, every group baffle comprises two relative netted baffles and forms the cavity between two netted baffles, pack copper oxide load HZSM-5 mesoporous molecular sieve catalyst in a set of baffle cavity near the import, pack platinum rhodium palladium load aluminium trioxide's ternary catalyst in a set of baffle cavity near the export; the catalytic unit exit linkage active carbon adsorption equipment, the inside active carbon of placing of active carbon adsorption equipment, the active carbon adsorption equipment export sets up the outlet duct.

The catalytic unit is made into a cylindrical shape by double-layer stainless steel plates, and heat insulating materials are arranged in the interlayer of the double-layer stainless steel plates.

The cooling pipe is wave-shaped and made of stainless steel.

An oil mist filter screen is arranged between the catalytic device and the active carbon adsorption equipment.

The mouth of pipe of outlet duct sets up the filter screen, prevents that debris from getting into automobile exhaust processing apparatus, plays the guard action.

The silencer is internally provided with a plurality of transverse silencing sheets, and the silencing sheet connecting rods are connected with the inner wall of the silencer.

The copper oxide supported HZSM-5 mesoporous molecular sieve catalyst is a commercial product, the copper oxide supporting amount is 25-30%, and the platinum rhodium palladium supported aluminum oxide ternary catalyst is a conventional ternary catalyst in the field. The copper oxide loaded HZSM-5 mesoporous molecular sieve catalyst has good catalytic effect on NO and hydrocarbon. The harmful substances in the automobile exhaust are partially treated by primary catalysis of a copper oxide loaded HZSM-5 mesoporous molecular sieve catalyst, then the NO and the hydrocarbon are completely catalyzed by a platinum-rhodium-palladium loaded aluminum oxide three-way catalyst, and CO is catalyzed and oxidized into carbon dioxide gas. After treatment, the three harmful gases become harmless gases, so that the automobile exhaust can be purified.

The automobile tail gas treatment process comprises the following steps:

automobile tail gas enters the wavy cooling pipe through the exhaust pipe through the air inlet pipe to be cooled, the cooled tail gas plays a role in protecting a catalyst behind the automobile tail gas, the service life of the catalyst is prolonged, the automobile tail gas enters the silencer to be silenced, then enters the catalytic device to be catalyzed, the automobile tail gas is catalyzed by the copper oxide loaded HZSM-5 mesoporous molecular sieve catalyst to remove most of NO and hydrocarbon, then is catalyzed by the platinum-rhodium-palladium loaded aluminum oxide three-way catalyst to further catalyze NO and hydrocarbon, CO is catalyzed and oxidized into carbon dioxide gas, after treatment, three harmful gases are changed into harmless gases, the automobile tail gas is purified, oil mist is removed through an oil mist filter screen after purification is finished, peculiar smell is adsorbed by active carbon adsorption equipment, and finally the automobile tail gas is exhausted through the exhaust pipe.

Compared with the prior art, the utility model has the advantages of it is following:

(1) the copper oxide loaded HZSM-5 mesoporous molecular sieve catalyst and the platinum rhodium palladium loaded aluminum oxide ternary catalyst are adopted for two-step catalysis, and the two catalysts are matched, so that three harmful gases can be changed into harmless gases, the automobile exhaust can be purified, and the catalytic effect is good.

(2) Automobile exhaust enters the wavy cooling pipe through the exhaust pipe through the air inlet pipe to be cooled, the cooled exhaust plays a role in protecting a rear catalyst, the service life of the catalyst is prolonged, most NO and hydrocarbon are treated after the automobile exhaust is primarily catalyzed by the copper oxide loaded HZSM-5 mesoporous molecular sieve catalyst, the problem that the platinum-rhodium-palladium loaded aluminum oxide ternary catalyst is easy to inactivate is solved, the service life of the catalyst is prolonged, and therefore the cost is reduced.

(3) The utility model discloses simple structure through cooperation such as cooling tube, silencer, two kinds of catalyst cooperations, oil mist filter screen, active carbon adsorption equipment, makes automobile exhaust emission to reach standard, and the noise reduction gets rid of oil mist, peculiar smell, long service life.

Drawings

FIG. 1 is a schematic structural diagram of an environmentally friendly automobile exhaust gas treatment device according to the present invention;

in the figure: the device comprises a gas inlet pipe 1, a cooling pipe 2, a silencer 3, a silencing sheet 4, a copper oxide-loaded HZSM-5 mesoporous molecular sieve catalyst 5, a catalytic device 6, a platinum-rhodium-palladium-loaded aluminum oxide three-way catalyst 7, a net-shaped partition plate 8, an oil mist filter screen 9, an active carbon adsorption device 10, a filter screen 11 and a gas outlet pipe 12.

Detailed Description

The present invention will be further described with reference to the following examples.

Examples

An environment-friendly automobile exhaust treatment device is shown in figure 1, wherein one end of the environment-friendly automobile exhaust treatment device is provided with an air inlet pipe 1, the air inlet pipe 1 is detachably connected with an automobile exhaust pipe, the other end of the air inlet pipe 1 is connected with a silencer 3 through a cooling pipe 2, the silencer 3 is connected with an inlet of a catalytic device 6, two groups of clapboards are sequentially arranged in the catalytic device 6 from the inlet to the outlet, each group of clapboards consists of two opposite reticular clapboards 8, a cavity is formed between the two reticular clapboards 8, a group of clapboard cavities close to the inlet are filled with a copper oxide loaded HZSM-5 mesoporous molecular sieve catalyst 5, and a group of clapboard cavities close to the outlet are; the outlet of the catalytic device 6 is connected with an activated carbon adsorption device 10, activated carbon is placed in the activated carbon adsorption device 10, and an outlet pipe 12 is arranged at the outlet of the activated carbon adsorption device 10.

The catalytic unit 6 is made in a cylindrical shape by double-layered stainless steel plates with a heat insulating material interposed therebetween.

The cooling pipe 2 is wave-shaped and made of stainless steel.

An oil mist filter screen 9 is arranged between the catalytic device 6 and the active carbon adsorption equipment 10.

The mouth of the air outlet pipe 12 is provided with a filter screen 11.

A plurality of transverse silencing sheets 4 are arranged inside the silencer 3.

The automobile tail gas treatment process comprises the following steps:

automobile tail gas enters the wavy cooling pipe 2 from the exhaust pipe through the air inlet pipe 1 to be cooled, the cooled tail gas plays a role in protecting a catalyst behind, the service life of the catalyst is prolonged, the tail gas enters the silencer 3 to be silenced, then enters the catalytic device 6 to be catalyzed, the automobile tail gas is catalyzed by the copper oxide loaded HZSM-5 mesoporous molecular sieve catalyst 5 to remove most of NO and hydrocarbon, then is catalyzed by the platinum-rhodium-palladium loaded aluminum oxide three-way catalyst 7 to further catalyze the NO and the hydrocarbon, CO is catalyzed and oxidized into carbon dioxide gas, after treatment, the three harmful gases are changed into harmless gases, the automobile tail gas is purified, oil mist is removed through the oil mist filter screen 9 after purification is finished, peculiar smell is adsorbed through the active carbon adsorption equipment 10, and finally the tail gas is discharged through the air outlet pipe 12.

Claims

1. The utility model provides an environmental protection automobile exhaust processing apparatus which characterized in that: one end of the air inlet pipe (1) is provided with an air inlet pipe, the air inlet pipe (1) is detachably connected with an automobile exhaust pipe, the other end of the air inlet pipe (1) is connected with a silencer (3) through a cooling pipe (2), the silencer (3) is connected with an inlet of a catalytic device (6), two groups of clapboards are sequentially arranged in the catalytic device (6) from the inlet to an outlet, each group of clapboards consists of two opposite reticular clapboards (8), a cavity is formed between the two reticular clapboards (8), a group of clapboard cavities close to the inlet is filled with a copper oxide loaded HZSM-5 mesoporous molecular sieve catalyst (5), and a group of clapboard cavities close to the outlet is filled with a platinum rhodium palladium loaded aluminum; the outlet of the catalytic device (6) is connected with an activated carbon adsorption device (10), activated carbon is placed in the activated carbon adsorption device (10), and an outlet pipe (12) is arranged at the outlet of the activated carbon adsorption device (10).

2. The environmental protection automobile exhaust gas treatment device according to claim 1, characterized in that: the catalytic unit (6) is made of a double-layer stainless steel plate in a cylindrical shape, and a heat insulating material is filled in the interlayer of the double-layer stainless steel plate.

3. The environmental protection automobile exhaust gas treatment device according to claim 1, characterized in that: the cooling pipe (2) is wave-shaped and made of stainless steel.

4. The environmental protection automobile exhaust gas treatment device according to claim 1, characterized in that: an oil mist filter screen (9) is arranged between the catalytic device (6) and the active carbon adsorption equipment (10).

5. The environmental protection automobile exhaust gas treatment device according to claim 1, characterized in that: the mouth of the air outlet pipe (12) is provided with a filter screen (11).

6. The environmental protection automobile exhaust gas treatment device according to claim 1, characterized in that: a plurality of transverse silencing sheets (4) are arranged in the silencer (3).