CN201354668Y

CN201354668Y - Engine tail gas purification muffler

Info

Publication number: CN201354668Y
Application number: CNU200920126210XU
Authority: CN
Inventors: 钱彻; 刘晓锋; 唐润模
Original assignee: CHONGQING MECHWEST Inc
Current assignee: CHONGQING MECHWEST Inc
Priority date: 2009-01-22
Filing date: 2009-01-22
Publication date: 2009-12-02
Anticipated expiration: 2019-01-22

Abstract

The utility model discloses an engine tail gas purification muffler, which comprises an outer casing, an air inlet pipe, an exhaust pipe and a catalytic converter, wherein, a flow distribution plate and a steel mesh are arranged in the outer casing so as to divide the inner chamber of the outer casing into an air inlet chamber, a catalysis processing chamber and an exhaust chamber in sequence from the air inlet end of the outer casing, the rear part of the air inlet pipe is extended into the air inlet chamber, ventholes communicated with the air inlet chamber and the catalysis processing chamber are formed on the flow distribution plate, a catalytic converter casing with the catalytic converter built in is installed in the catalysis processing chamber, gases can enter the exhaust chamber from the air inlet chamber through the catalytic converter and the steel mesh, the front part of the exhaust pipe is positioned inside the exhaust chamber, the head end of the exhaust pipe is sealed, the rear part of the exhaust pipe extends out of the outer casing, exhaust tap holes are densely distributed on the pipe wall of the exhaust pipe inside the exhaust chamber, and the exhaust chamber is filled with sound absorption cushions made of sound absorption materials. The utility model has the advantages of simple structure, and good tail gas purification and muffling effects.

Description

A kind of engine tail gas purification silencing apparatus

Technical field

The utility model relates to a kind of silencer of motor, particularly a kind of engine tail gas purification silencing apparatus.

Background technique

In recent years, people are in order to protect environment effectively, and the tail gas clean-up problem at motor has proposed all solutions, has designed various device for purifying and treating tail gas.Harmful matters such as the dust in the way filtration tail gas of the purifying processing device usefulness liquid filtering that has, carbon granules, waste gas; What have makes harmful gas chemical reaction in the tail gas with catalyzer, generates innocuous gas; Have with electromagnetic field principle magnetization or the harmful matter in the tail gas is charged and with it absorption.Though various ways have all produced certain effect to the purification of motor exhaust, exist some shortcomings separately, as cost an arm and a leg, difficult in maintenance, single purification or single filtration, purifying effect is not good etc., thus the device for purifying and treating tail gas that causes inventing is difficult to carry out and promotes.

The model utility content

Technical problem to be solved in the utility model is to provide a kind of simple in structure, tail gas clean-up and the effective engine tail gas purification silencing apparatus of noise elimination.

In order to address the above problem, the technical solution adopted in the utility model is: a kind of engine tail gas purification silencing apparatus, comprise frame, suction tude, outlet pipe and catalyst converter, be provided with flow distribution plate and steel mesh in the described frame, the frame inner chamber is divided into suction chamber, catalytic treatment chamber and exhaust chamber successively from inlet end, and the rear portion of described suction tude is stretched in the suction chamber; Described flow distribution plate is provided with the vent that is communicated with suction chamber and catalytic treatment chamber; Adorn the catalyst converter shell of described catalyst converter in being equipped with in described catalytic treatment chamber, gas can enter exhaust chamber through catalyst converter and described steel mesh from suction chamber; The front portion of described outlet pipe is positioned at this exhaust chamber, the sealing of the head end of this outlet pipe, and described frame is stretched out at the rear portion of this outlet pipe, is arranged at this outlet pipe on the tube wall of exhaust chamber to be densely covered with the bypassing exhaust hole; In described exhaust chamber, be filled with the sound-absorbing pad of sound absorption material.

The waste gas that motor ejects enters suction chamber through suction tude, and the vent on flow distribution plate enters the indoor catalyst converter of catalytic treatment again, and catalyst converter can adopt porcelain filter or metallic filter, and dip-coating has catalytic specie on catalytic filter.Catalytic specie at high temperature impels the toxic and harmful in the waste gas to carry out chemical reaction, and hydrocarbon (HC) is converted into harmless water (H ₂O) and carbon dioxide (CO ₂), carbon monoxide (CO) is converted into harmless carbon dioxide (CO ₂).Gas after the purified treatment enters exhaust chamber by steel mesh, enters atmosphere by the exhaust port on the outlet pipe in exhaust chamber.Be in the decibel value that sound-absorbing pad in the exhaust chamber has further reduced noise.

Above-mentioned sound-absorbing pad is preferably glass fibre or asbestos.

As improvement at such scheme, the endcapped of above-mentioned suction tude, be arranged in this suction tude on the tube wall of described suction chamber and be densely covered with inlet hole, vent on this inlet hole and the flow distribution plate can play buffer function to the gas that enters in the suction tude, prevents the excessive damage catalyst converter of gas impulse force.

In the such scheme, the head end of described outlet pipe is fixedly mounted on the sidewall of described steel mesh, and by this steel mesh sealing.

As another embodiment of the present utility model, above-mentioned catalyst converter shell is made up of preposition catalyst converter shell and rearmounted catalyst converter shell, be provided with isolating ring between preposition catalyst converter shell and the rearmounted catalyst converter shell, in this preposition catalyst converter shell and rearmounted catalyst converter shell, preposition catalyst converter and rearmounted catalyst converter are housed respectively, and the filter core aperture of preposition catalyst converter is greater than or less than the filter core aperture of rearmounted catalyst converter.Like this, the toxic and harmful in the waste gas through preposition catalyst converter, is converted into harmless water (H with hydrocarbon (HC) earlier ₂O) and carbon dioxide (CO ₂), carbon monoxide (CO) is converted into harmless carbon dioxide (CO ₂), and then the rearmounted catalyst converter of process further is converted into toxic and harmful harmless gas.Because catalyst converter is pottery with micropore or the metal that scribbles catalyzer, removes and continue nitrous oxide (NO) is converted into harmless nitrogen dioxide (NO ₂) outside, also the particulate matter in the tail gas is caught.When filter core aperture, the filter core aperture of preposition catalyst converter greater than rearmounted catalyst converter, the high-temperature gas that motor produces when high-load operation will be caught the particulate matter of living to rearmounted catalyst converter and be burnt at the isolating ring internal combustion, become innocuous gas and discharge, reach the purpose of further cleaning of off-gas like this through outlet pipe.Equally, when the filter core aperture of preposition catalyst converter less than in the filter core aperture of rearmounted catalyst converter, high-temperature gas will be caught the particulate matter of living to preposition catalyst converter and be burnt.

Now, the utlity model has following beneficial effect for prior art:

(1) the utility model is simple in structure, and it is one that collection purifies noise elimination function, and the reduction of hydrocarbon, carbon monoxide and the oxynitrides in the gas of Pai Chuing is up to 90% after treatment, nitrogen oxide (NO _X) content also significantly reduce;

(2) the particulate matter reduction in the exhaust after treatment is up to 93%;

(3) the waste gas noise figure obviously reduces, and exhaust sound value (db) reduces about 25 decibels.

Description of drawings

Fig. 1 is the utility model embodiment 1 a structural representation;

Fig. 2 is the utility model embodiment 2 a structural representation;

Fig. 3 is the structural representation of flow distribution plate 5.

Embodiment

Further the utility model is illustrated below in conjunction with drawings and Examples.

Embodiment 1, as shown in Figure 1, the engine tail gas purification silencing apparatus mainly is made of frame 3, suction tude 1, flow distribution plate 5, catalyst converter 8, steel mesh 10, outlet pipe 13 and sound-absorbing pad 11, the cross section of frame 3 is circular, also can be for square or oval, the front end and back end of frame 3 is respectively through front cover 2 and rear end cover 12 sealings.Flow distribution plate 5 and steel mesh 10 are housed in frame 3, frame 3 inner chambers are divided into suction chamber 4, catalytic treatment chamber 6 and exhaust chamber successively from inlet end, the endcapped of described suction tude 1, stretch in the suction chamber 4 from front cover 2, on the tube wall of this suction tude 1 that is arranged in suction chamber 4, be densely covered with inlet hole 1a, to reduce the impact of high-temperature tail gas to catalyst converter 8.On flow distribution plate 5, be covered with the vent 5a (as Fig. 2) that is communicated with suction chamber 4 and catalytic treatment chamber 6, with of the impact of further minimizing high-temperature tail gas to catalyst converter 8.

The catalyst converter shell 7 of dress catalyst converter 8 in catalytic treatment chamber 6, being equipped with, gas can enter exhaust chamber through catalyst converter 8 and described steel mesh 10 from suction chamber 4, tail gas enters the exhaust chamber through catalyst converter 8 from suction chamber 4, catalyzer generation oxidation and chemical reaction with catalyst converter 8 surfaces, hydrocarbon in the waste gas is converted into water and carbon dioxide, carbon monoxide is converted into carbon dioxide, and nitrous oxide (NO) is converted into harmless nitrogen dioxide (NO ₂), reach the purpose of cleaning of off-gas; Simultaneously, catalyst converter 8 plays the effect of noise reduction.

The front portion of outlet pipe 13 is positioned at this exhaust chamber, the head end of this outlet pipe 13 is welded on the sidewall of steel mesh 10, and by 10 sealings of this steel mesh, described frame 3 is stretched out from rear end cover 12 in the rear portion of this outlet pipe 13, is arranged at this outlet pipe 13 on the tube wall of exhaust chamber to be densely covered with exhaust port 13a.In exhaust chamber, load the sound-absorbing pad 11 that glass fibre or asbestos are made, further reduced the decibel value of noise.

Embodiment 2, catalyst converter shell 7a, the 7b of

dress catalyst converter

8a, 8b in two are housed in catalytic treatment chamber 6 as different from Example 1, between preposition catalyst converter shell 7a and the rearmounted catalyst converter shell 7b isolating ring 9 is installed, in the present embodiment, the filter core aperture of preposition catalyst converter 8a is greater than the filter core aperture of rearmounted catalyst converter 8b.Like this, the toxic and harmful in the waste gas is converted into harmless water (H through preposition catalyst converter 8a with hydrocarbon (HC) earlier ₂O) and carbon dioxide (CO ₂), carbon monoxide (CO) is converted into harmless carbon dioxide (CO ₂), and then the rearmounted catalyst converter 8b of process continues nitrous oxide (NO) is converted into harmless nitrogen dioxide (NO ₂), simultaneously the particulate matter in the gas is caught.The high-temperature gas that motor produces when high loaded process will be caught the particulate matter of living to this device and be burnt at isolating ring 9 internal combustions.

Embodiment 3

The filter core aperture of preposition as different from Example 2 catalyst converter 8a is less than the filter core aperture of rearmounted catalyst converter 8b, like this, particulate matter in the gas is caught by preposition catalyst converter 8a, and the high-temperature gas that motor produces when high loaded process will be caught the particulate matter of living to this device and be burnt before preposition catalyst converter 8a.

Claims

1. engine tail gas purification silencing apparatus, comprise frame (3), suction tude (1), outlet pipe (13) and catalyst converter (8), it is characterized in that: be provided with flow distribution plate (5) and steel mesh (10) in the described frame (3), frame (3) inner chamber is divided into suction chamber (4), catalytic treatment chamber (6) and exhaust chamber successively from inlet end, and the rear portion of described suction tude (1) is stretched in the suction chamber (4); Described flow distribution plate (5) is provided with the vent (5a) that is communicated with suction chamber (4) and catalytic treatment chamber (6); Adorn the catalyst converter shell (7) of described catalyst converter (8) in being equipped with in described catalytic treatment chamber (6), gas can enter exhaust chamber through catalyst converter (8) and described steel mesh (10) from suction chamber (4); The front portion of described outlet pipe (13) is positioned at this exhaust chamber, the sealing of the head end of this outlet pipe (13), and described frame (3) is stretched out at the rear portion of this outlet pipe (13), is arranged at this outlet pipe (13) on the tube wall of exhaust chamber to be densely covered with exhaust port (13a); In described exhaust chamber, be filled with the sound-absorbing pad (11) of sound absorption material.

2. engine tail gas purification silencing apparatus according to claim 1 is characterized in that: described sound-absorbing pad (11) is glass fibre or asbestos.

3. engine tail gas purification silencing apparatus according to claim 1 is characterized in that: the endcapped of described suction tude (1) is arranged in this suction tude (1) on the tube wall of described suction chamber (4) and is densely covered with inlet hole (1a).

4. engine tail gas purification silencing apparatus according to claim 1 is characterized in that: the head end of described outlet pipe (13) is fixedly mounted on the sidewall of described steel mesh (10), and is sealed by this steel mesh (10).

5. according to the arbitrary described engine tail gas purification silencing apparatus of claim 1 to 4, it is characterized in that: described catalyst converter shell (7) is made up of preposition catalyst converter shell (7a) and rearmounted catalyst converter shell (7b), be provided with isolating ring (9) between preposition catalyst converter shell (7a) and the rearmounted catalyst converter shell (7b), preposition catalyst converter (8a) and rearmounted catalyst converter (8b) are housed respectively, and the filter core aperture of preposition catalyst converter (8a) is greater than or less than the filter core aperture of rearmounted catalyst converter (8b) in this preposition catalyst converter shell (7a) and rearmounted catalyst converter shell (7b).