CN104500186A - Motor vehicle tail gas purifying silencer - Google Patents
Motor vehicle tail gas purifying silencer Download PDFInfo
- Publication number
- CN104500186A CN104500186A CN201510011133.3A CN201510011133A CN104500186A CN 104500186 A CN104500186 A CN 104500186A CN 201510011133 A CN201510011133 A CN 201510011133A CN 104500186 A CN104500186 A CN 104500186A
- Authority
- CN
- China
- Prior art keywords
- solution
- carrier
- hours
- motor vehicle
- catalysts
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
Links
Classifications
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02A—TECHNOLOGIES FOR ADAPTATION TO CLIMATE CHANGE
- Y02A50/00—TECHNOLOGIES FOR ADAPTATION TO CLIMATE CHANGE in human health protection, e.g. against extreme weather
- Y02A50/20—Air quality improvement or preservation, e.g. vehicle emission control or emission reduction by using catalytic converters
Abstract
The invention discloses a motor vehicle tail gas purifying silencer which comprises a cylindrical shell. One end of the shell is provided with a gas inlet connected with an engine exhaust manifold, the other end of the shell is provided with a gas outlet, a catalyst chamber is arranged in the shell and close to the front of the gas inlet and filled with catalysts in a layered manner, active components of the catalysts are distributed in a graded manner, a gas flow channel is reserved between the catalysts, a gas outlet in the rear of the catalyst chamber is connected with a continuous 'U'-shaped silencing pipe, and silencing holes are formed in the wall of the silencing pipe. Active metal impregnation liquid with different concentrations is impregnated in a graded manner step by step, so that the active metal components of the integrated catalysts from one end to the other end are incrementally distributed in a graded manner, use of the active metal components in the catalysts is reduced, the active metal components of the integrated catalysts can reach and even are superior to those of an existing catalyst in the prior art in the aspects such as catalytic activity, selectivity and conversion rate, the catalysts in the catalyst chamber are placed in a layered manner, the gas flow channel is reserved, and the catalytic efficiency of tail gas is improved.
Description
Technical field
The present invention relates to a kind of exhaust gas purifying silencing device for motor vehicle, belong to field of Environment Protection.
Background technique
China's automobile pollution is more than 100,000,000, huge progradation is served to national economy, provide convenience to the life of people, but the effulent of harmful matter in vehicle exhaust causes comparatively ill effect as carbon monoxide, unburned carbon hydrogen, nitrogen oxide and particulate etc. to environment, needs to realize vehicle exhaust zero pollutant discharge by the technological means of advanced person.
Requiring to include usually to tai-gas clean-up catalyst: high activity, exhaust emissions amount is large, and catalytic converter installing space is limited, and determining cleaning catalyst must use under high-speed, but under high-speed, use catalyzer must possess quite high activity; Good selectivity, can transform harmful matter in tail gas; Good thermostability, normally can use under the high temperature condition of tail gas.In traditional tai-gas clean-up catalyst, active metal is uniformly distributed in the carrier, because nitrogen oxide in exhaust emissions process is emitted on concentration in integral catalyzer in continuous conversion with tail gas, therefore, in traditional catalyzer, active component can not reach and make full use of, and load capacity is large, purification cost is high.
The main cities noise source of the influence of noise people work and study life in addition during the work of precession car engine.
Summary of the invention
The object of the invention is to for utilizing of active component in integral catalyzer in prior art insufficient, and the problem that preparation cost is high, there is provided a kind of and produce that raw this is low, and there is good catalytic activity, selectivity and conversion ratio, have the tail-gas purifying silencer of noise elimination function concurrently.
For achieving the above object, the present invention adopts following technological scheme to realize:
A kind of exhaust gas purifying silencing device for motor vehicle, exhaust gas purifying silencing device for motor vehicle comprises cylindrical housings, one end of housing be connected with enmgine exhaust suction port, housing one end be air outlet, in housing, be provided with catalyst chamber near the front portion of suction port, in catalyst chamber, layering is filled with the catalyzer of active component gradient distribution, gas flow channel is left between every layer of catalyzer, the gas outlet at catalyst chamber rear portion connects " U " type hush tube continuously, hush tube tube wall has sound attenuation hole, and the afterbody of " U " type hush tube is connected with air outlet continuously;
The preparation process of the catalyzer of active component gradient distribution is as follows:
1) compound concentration is the palladium nitrate solution of 10g/L, 8g/L, 5g/L and 3g/L respectively, for subsequent use;
2) load weighted cerous nitrate and zirconium nitrate are added in deionized water, be uniformly mixed and obtain mixed solution, wherein in cerium oxide and zirconium oxide, the mol ratio of cerium and zirconium is 1:1, adds 2ml and analyzes straight alcohol solution, add 1g polyethyleneglycol again after dispersed with stirring in this solution, mixed solution is placed in 70 DEG C of water-baths to heat, stir 30 minutes, obtain mixed solution, the volume of this mixed solution is 1.5 times of cordierite honeycomb ceramic carrier volume to be impregnated;
3) get and be of a size of 50mm × 25mm × 30mm cordierite honeycomb ceramic as carrier, this carrier is placed in step 2) mixed solution, fully dipping 30 minutes, takes out and to be placed in baking oven 180 DEG C of dryings 2 hours;
4) dried for step 3) carrier is placed in Muffle furnace about 500 DEG C of-550 DEG C of roastings 2 hours, naturally cools to room temperature, obtain the catalyst carrier with cerium zirconium coating;
5) concentration of getting step 1) preparation is the palladium nitrate solution of 3g/L, is immersed completely by the carrier of step 4) in this solution, flood 30 minutes, and taking-up to be placed in baking oven 120 DEG C of dryings 2 hours;
6) concentration of getting step 1) preparation is the palladium nitrate solution of 5g/L, and this solution is inserted in dried for step 5) semi-finished product elongatedness direction, the carrier of 3/4 length is immersed in solution, flood 30 minutes, and taking-up to be placed in baking oven 120 DEG C of dryings 2 hours;
7) concentration of getting step 1) preparation is the palladium nitrate solution of 8g/L, this solution is inserted in the semi-finished product elongatedness direction that step 6) obtains, and insertion one end is identical with step 6), and makes the carrier of 1/2 length immerse in solution, flood 30 minutes, take out and to be placed in baking oven 120 DEG C of dryings 2 hours;
8) concentration of getting step 1) preparation is the palladium nitrate solution of 10g/L, this solution is inserted in the semi-finished product elongatedness direction that step 7) obtains, insert one end identical with step 7), and make the carrier of 1/4 length immerse in solution, flood 30 minutes, taking-up to be placed in baking oven 120 DEG C of dryings 2 hours, then dried product is placed in Muffle furnace 800 DEG C of roastings 3 hours, obtains catalyst prod.
The volume of catalyst chamber is the 1/3-1/2 of housing volume.
The caliber of hush tube is the 1/3-2/3 of cylindrical housings internal diameter.
In catalyst prod, the gross mass of active component Pd accounts for the 0.2wt% of cordierite honeycomb ceramic carrier weight.
Beneficial effect of the present invention:
Present invention employs the active metal maceration extract of stepwise gradient formula dipping variable concentrations, integral catalyzer is passed through, and mode that active metal component increases progressively in gradient distributes, by the integral catalyzer that above-mentioned preparation method obtains, not only reduce the consumption of active metal component in catalyzer, the catalytic activity, selectivity and the conversion ratio that are even better than existing catalyzer in prior art can be reached simultaneously.Simultaneously by the effect of hush tube, sound is removed, and realizes while achieving tail gas clean-up noise reduction.Catalyzer layering in catalyst chamber is placed, and leaves the passage of gas circulation, improves the catalytic efficiency of tail gas.
Accompanying drawing explanation
Fig. 1 is the schematic diagram of exhaust gas purifying silencing device for motor vehicle.
1-housing, 2-suction port, 3-air outlet, 4-catalyst chamber, 5-catalyzer, 6-" U " type hush tube continuously.
Embodiment
A kind of exhaust gas purifying silencing device for motor vehicle, exhaust gas purifying silencing device for motor vehicle comprises cylindrical housings 1, one end of housing 1 be connected with enmgine exhaust suction port 2, housing one end be air outlet 3, in housing, be provided with catalyst chamber 4 near the front portion of suction port, in catalyst chamber 4, layering is filled with the catalyzer 5 of active component gradient distribution, gas flow channel is left between every layer of catalyzer, the gas outlet at catalyst chamber rear portion connects " U " type hush tube 6 continuously, hush tube tube wall has sound attenuation hole, and the afterbody of " U " type hush tube is connected with air outlet 3 continuously.
embodiment 1
Take deionized water as solvent, compound concentration is the palladium nitrate solution of 10g/L, 8g/L, 5g/L and 3g/L respectively, for subsequent use.
Load weighted cerous nitrate and zirconium nitrate are added in deionized water, is uniformly mixed and obtains mixed solution, wherein with CeO
2and ZrO
2meter, the mol ratio of cerium and zirconium is 1:1, in this solution, add 2ml analyze straight alcohol solution, 1g polyethyleneglycol is added again after dispersed with stirring, mixed solution is placed in 70 DEG C of water-baths to heat, stir 30 minutes, obtain mixed solution, the volume of this mixed solution is 1.5 times of cordierite honeycomb ceramic carrier volume to be impregnated.
Get and be of a size of 50mm × 25mm × 30mm cordierite honeycomb ceramic as carrier, this carrier is placed in above-mentioned mixed solution, fully dipping 30 minutes, take out and to be placed in baking oven 180 DEG C of dryings 2 hours.
Dried for previous step carrier is placed in Muffle furnace 500 DEG C of roastings 2 hours, naturally cools to room temperature, obtain the catalyst carrier with cerium zirconium coating.
The concentration of getting preparation is the palladium nitrate solution of 3g/L, is immersed completely by the carrier of previous step in this solution, floods 30 minutes, takes out and to be placed in baking oven 120 DEG C of dryings 2 hours;
The concentration of getting preparation is the palladium nitrate solution of 5g/L, and this solution is inserted in dried for previous step semi-finished product elongatedness direction, the carrier of 3/4 length is immersed in solution, flood 30 minutes, and taking-up to be placed in baking oven 120 DEG C of dryings 2 hours.
The concentration of getting preparation is the palladium nitrate solution of 8g/L, this solution is inserted in the semi-finished product elongatedness direction that previous step obtains, and insertion one end is identical with previous step, and makes the carrier of 1/2 length immerse in solution, flood 30 minutes, take out and to be placed in baking oven 120 DEG C of dryings 2 hours.
The concentration of getting preparation is the palladium nitrate solution of 10g/L, this solution is inserted in the semi-finished product elongatedness direction that previous step obtains, insert one end identical with previous step, and make the carrier of 1/4 length immerse in solution, flood 30 minutes, taking-up to be placed in baking oven 120 DEG C of dryings 2 hours, then dried product is placed in Muffle furnace, heating rate is 10 DEG C/minute, 800 DEG C of roastings 3 hours, obtain catalyst prod, wherein the gross mass of active component Pd accounts for the 0.2wt% of cordierite honeycomb ceramic carrier weight.
comparative example 1
Take deionized water as solvent, compound concentration is the palladium nitrate solution of 5g/L, for subsequent use.
Load weighted cerous nitrate and zirconium nitrate are added in deionized water, is uniformly mixed and obtains mixed solution, wherein with CeO
2and ZrO
2meter, the mol ratio of cerium and zirconium is 1:1, in this solution, add 2ml analyze straight alcohol solution, 1g polyethyleneglycol is added again after dispersed with stirring, mixed solution is placed in 70 DEG C of water-baths to heat, stir 30 minutes, obtain mixed solution, the volume of this mixed solution is 1.5 times of cordierite honeycomb ceramic carrier volume to be impregnated.
Get and be of a size of 50mm × 25mm × 30mm cordierite honeycomb ceramic as carrier, this carrier is placed in above-mentioned mixed solution, fully dipping 30 minutes, take out and to be placed in baking oven 180 DEG C of dryings 2 hours.
Dried for previous step carrier is placed in Muffle furnace 500 DEG C of roastings 2 hours, naturally cools to room temperature, obtain the catalyst carrier with cerium zirconium coating.
The concentration of getting preparation is the palladium nitrate solution of 5g/L, is immersed completely in this solution by the carrier of previous step, fully floods, and takes out and to be placed in baking oven 120 DEG C of dryings 2 hours; Obtain catalyst prod, wherein the gross mass of active component Pd accounts for the 0.35wt% of cordierite honeycomb ceramic carrier weight.
Embodiment 1 and comparative example 1 are prepare different catalyzer, carry out tail gas clean-up test, obtain different tail gas clean-up effects by above-mentioned obtained catalyst filling to above-mentioned purification silencer.
From the above results can find out the catalyzer that the load capacity of catalyst activity metal of the present invention is more obtained than conventional method, active metal load total amount is little, but catalyzer of the present invention can reach and to have identical even better catalytic activity and conversion ratio with traditional catalyst.
Claims (4)
1. an exhaust gas purifying silencing device for motor vehicle, exhaust gas purifying silencing device for motor vehicle comprises cylindrical housings, one end of housing be connected with enmgine exhaust suction port, housing one end be air outlet, in housing, be provided with catalyst chamber near the front portion of suction port, in catalyst chamber, layering is filled with the catalyzer of active component gradient distribution, gas flow channel is left between every layer of catalyzer, the gas outlet at catalyst chamber rear portion connects " U " type hush tube continuously, hush tube tube wall has sound attenuation hole, and the afterbody of " U " type hush tube is connected with air outlet continuously; It is characterized in that, the preparation process of the catalyzer of active component gradient distribution is as follows:
1) compound concentration is the palladium nitrate solution of 10g/L, 8g/L, 5g/L and 3g/L respectively, for subsequent use;
2) load weighted cerous nitrate and zirconium nitrate are added in deionized water, be uniformly mixed and obtain mixed solution, wherein in cerium oxide and zirconium oxide, the mol ratio of cerium and zirconium is 1:1, adds 2ml and analyzes straight alcohol solution, add 1g polyethyleneglycol again after dispersed with stirring in this solution, mixed solution is placed in 70 DEG C of water-baths to heat, stir 30 minutes, obtain mixed solution, the volume of this mixed solution is 1.5 times of cordierite honeycomb ceramic carrier volume to be impregnated;
3) get and be of a size of 50mm × 25mm × 30mm cordierite honeycomb ceramic as carrier, this carrier is placed in step 2) mixed solution, fully dipping 30 minutes, takes out and to be placed in baking oven 180 DEG C of dryings 2 hours;
4) dried for step 3) carrier is placed in Muffle furnace about 500 DEG C of-550 DEG C of roastings 2 hours, naturally cools to room temperature, obtain the catalyst carrier with cerium zirconium coating;
5) concentration of getting step 1) preparation is the palladium nitrate solution of 3g/L, is immersed completely by the carrier of step 4) in this solution, flood 30 minutes, and taking-up to be placed in baking oven 120 DEG C of dryings 2 hours;
6) concentration of getting step 1) preparation is the palladium nitrate solution of 5g/L, and this solution is inserted in dried for step 5) semi-finished product elongatedness direction, the carrier of 3/4 length is immersed in solution, flood 30 minutes, and taking-up to be placed in baking oven 120 DEG C of dryings 2 hours;
7) concentration of getting step 1) preparation is the palladium nitrate solution of 8g/L, this solution is inserted in the semi-finished product elongatedness direction that step 6) obtains, and insertion one end is identical with step 6), and makes the carrier of 1/2 length immerse in solution, flood 30 minutes, take out and to be placed in baking oven 120 DEG C of dryings 2 hours;
8) concentration of getting step 1) preparation is the palladium nitrate solution of 10g/L, this solution is inserted in the semi-finished product elongatedness direction that step 7) obtains, insert one end identical with step 7), and make the carrier of 1/4 length immerse in solution, flood 30 minutes, taking-up to be placed in baking oven 120 DEG C of dryings 2 hours, then dried product is placed in Muffle furnace 800 DEG C of roastings 3 hours, obtains catalyst prod.
2. exhaust gas purifying silencing device for motor vehicle as claimed in claim 1, is characterized in that: the volume of catalyst chamber is the 1/3-1/2 of housing volume.
3. exhaust gas purifying silencing device for motor vehicle as claimed in claim 1, is characterized in that: the caliber of hush tube is the 1/3-2/3 of cylindrical housings internal diameter.
4. exhaust gas purifying silencing device for motor vehicle as claimed in claim 1, is characterized in that: in catalyst prod, the gross mass of active component Pd accounts for the 0.2wt% of cordierite honeycomb ceramic carrier weight.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510011133.3A CN104500186B (en) | 2015-01-11 | 2015-01-11 | A kind of exhaust gas purifying silencing device for motor vehicle |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510011133.3A CN104500186B (en) | 2015-01-11 | 2015-01-11 | A kind of exhaust gas purifying silencing device for motor vehicle |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN104500186A true CN104500186A (en) | 2015-04-08 |
| CN104500186B CN104500186B (en) | 2016-08-17 |
Family
ID=52941625
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201510011133.3A Expired - Fee Related CN104500186B (en) | 2015-01-11 | 2015-01-11 | A kind of exhaust gas purifying silencing device for motor vehicle |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN104500186B (en) |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN100998941A (en) * | 2007-01-04 | 2007-07-18 | 华东理工大学 | Precatalyst and its preparation method |
| US20100233045A1 (en) * | 2009-03-16 | 2010-09-16 | Gm Global Technology Operations, Inc. | Sulfur tolerant perovskite supported catalysts |
| CN101947456A (en) * | 2010-08-19 | 2011-01-19 | 华南理工大学 | Integral automobile exhaust purification catalyst and preparation method thereof |
| CN102614874A (en) * | 2011-01-28 | 2012-08-01 | 比亚迪股份有限公司 | Preparation method of alumina slurry, automobile exhaust purification catalyst containing the alumina slurry and preparation method of the automobile exhaust purification catalyst containing the alumina slurry |
| CN103375224A (en) * | 2012-04-27 | 2013-10-30 | 雅马哈发动机株式会社 | Muffler and saddle-ride type vehicle |
-
2015
- 2015-01-11 CN CN201510011133.3A patent/CN104500186B/en not_active Expired - Fee Related
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN100998941A (en) * | 2007-01-04 | 2007-07-18 | 华东理工大学 | Precatalyst and its preparation method |
| US20100233045A1 (en) * | 2009-03-16 | 2010-09-16 | Gm Global Technology Operations, Inc. | Sulfur tolerant perovskite supported catalysts |
| CN101947456A (en) * | 2010-08-19 | 2011-01-19 | 华南理工大学 | Integral automobile exhaust purification catalyst and preparation method thereof |
| CN102614874A (en) * | 2011-01-28 | 2012-08-01 | 比亚迪股份有限公司 | Preparation method of alumina slurry, automobile exhaust purification catalyst containing the alumina slurry and preparation method of the automobile exhaust purification catalyst containing the alumina slurry |
| CN103375224A (en) * | 2012-04-27 | 2013-10-30 | 雅马哈发动机株式会社 | Muffler and saddle-ride type vehicle |
Also Published As
| Publication number | Publication date |
|---|---|
| CN104500186B (en) | 2016-08-17 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| KR100993742B1 (en) | Device for the purification of diesel exhaust gases | |
| CN107715875B (en) | GPF quaternary catalyst and preparation method thereof | |
| CN102489322B (en) | Catalyst for purifying tail gas of diesel automobiles, preparation method and purification device thereof | |
| CN108979798B (en) | Gasoline vehicle particle trapping catalyst and preparation method thereof | |
| CN109621952B (en) | Catalyst for gasoline engine tail gas particulate matter filter and preparation method thereof | |
| CN103127951A (en) | Low temperature SCR catalyst used for diesel car tail gas denitration and preparation method | |
| US11643957B2 (en) | Systems and methods for virtually determining fuel sulfur concentration | |
| JP2012516228A (en) | Diesel oxidation catalyst with excellent activity at low temperatures | |
| CN103071524A (en) | Oxidation catalyst for purifying diesel engine waste gas and preparation method of oxidation catalyst | |
| CN107035483B (en) | Catalytic purification of motor vehicle tail gas device | |
| CN103861615B (en) | A kind of Catalysts and its preparation method for purifying vehicle exhaust | |
| CN104500186B (en) | A kind of exhaust gas purifying silencing device for motor vehicle | |
| CN101632926B (en) | Exhaust gas catalysts and exhaust-gas catalytic converter | |
| CN111219236A (en) | Diesel engine tail gas aftertreatment system | |
| CN104759281B (en) | A kind of preparation method of the composite oxide catalysts for purification diesel engine | |
| CN104492434B (en) | A kind of preparation method of the tai-gas clean-up catalyst of active component Gradient distribution | |
| CN106050372A (en) | Vehicle three-way catalytic converter for collecting integrated particulate matters | |
| CN113274879A (en) | Tail gas aftertreatment system for gas engine and preparation method and application thereof | |
| JP2018161618A (en) | Manufacturing method for particulate filter with catalyst | |
| CN102773015B (en) | Catalyst elements | |
| CN115814844B (en) | Preparation method of copper molecular sieve HC-SCR catalyst | |
| CN115814845B (en) | Preparation method of copper-tin molecular sieve HC-SCR catalyst | |
| CN114653396B (en) | DPF catalyst coating method capable of achieving low exhaust back pressure and high catalytic efficiency | |
| US20230003151A1 (en) | Systems and methods for reactive regeneration of selective catalytic reduction catalysts | |
| KR102441028B1 (en) | System for after-treatment of exhaust gas for diesel engine including the filter coated with denitrification catalyst |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C41 | Transfer of patent application or patent right or utility model | ||
| CB03 | Change of inventor or designer information |
Inventor after: Li Huafang Inventor before: Ye Cheng |
|
| COR | Change of bibliographic data | ||
| TR01 | Transfer of patent right |
Effective date of registration: 20160901 Address after: 361000 room 380, Nanshan Road, Huli District, Fujian, Xiamen, 102 Patentee after: Xiamen bright Technology Co., Ltd. Address before: Longwan Waterfront Street Wenzhou city Zhejiang province 325024 Sand Street No. 228 second floor Patentee before: WENZHOU HONGCHENGXIANG TECHNOLOGY CO., LTD. |
|
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20160817 Termination date: 20200111 |
|
| CF01 | Termination of patent right due to non-payment of annual fee |