CN104632329A - Metal soot particle filter for diesel engine - Google Patents
Metal soot particle filter for diesel engine Download PDFInfo
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- CN104632329A CN104632329A CN201410852304.0A CN201410852304A CN104632329A CN 104632329 A CN104632329 A CN 104632329A CN 201410852304 A CN201410852304 A CN 201410852304A CN 104632329 A CN104632329 A CN 104632329A
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- soot
- particle filter
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- soot particle
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- Exhaust Gas Treatment By Means Of Catalyst (AREA)
Abstract
A metal soot particle filter for a diesel engine comprises a shell and a columnar carrier of oxidation catalysts, wherein the columnar carrier of the oxidation catalysts is arranged in the shell, and one end face of the columnar carrier faces an air intake side assembly. The metal soot particle filter is characterized in that the outside of the other end face, facing an air exhaust side assembly, of the columnar carrier of the oxidation catalysts is provided with a metallic mesh soot particle filter body comprising a metallic mesh columnar carrier; under the catalytic combustion condition provided when NO in exhaust of the diesel engine is reduced to N2O in a catalytic oxidation mode through the oxidation catalysts, soot PM is firstly filtered out or blocked by the metallic mesh soot particle filter body and then subjected to catalytic oxidation and catalytic combustion under the action of the catalysts, soluble organic fractions in the soot PM are partially oxidized into CO2 and H2O, the size of the soot PM is reduced, catalytic combustion is conducted at the same time, toxicity and harmful factors are eliminated, and the problem that the soot PM exceeds the standard is solved effectively. The low-temperature catalytic activity and maximum conversion rate are further increased, and the metal soot particle filter has better competitiveness in the aspects of technology and economy.
Description
Technical field
The present invention relates to the catalytic reactor structure that the harmful components of general motor to exhaust carry out catalyzed conversion, particularly relate to a kind of use for diesel engine metal soot particle filter.
Background technique
, mostly there is a kind of pollution of minimizing, the another kind of defect polluting increase certainly will be caused in automobile (hereinafter referred to as diesel-oil vehicle) the tail gas pollution processing method of existing employing diesel engine.Under the pressure of Abgasgesetz, diesel engine for automobile just constantly carries out technology upgrading and improvement on the one hand, on the other hand, select appropriate such as particulate oxidation catalyst converter (Particulate Oxidation Catalyst, initialism is POC), selective catalytic reduction (Selective Catalytic Reduction, initialism is SCR), diesel oxidation catalyst (Diesel Oxidation Catalyst, initialism is DOC) and wall-flow diesel particulate filter (Diesel Particle Filter, initialism is DPF) etc. diesel engine cigarette preprocessor, to meet state four, Europe IV, Europe V and state V emission standard.Wherein POC cigarette preprocessor is first by soot particle, also known as particulate matter (Particulate Matter, initialism is PM) filter or retain after, be oxidized under the effect of catalyzer, the soluble organic fraction in soot PM (Soluble Organic Fraction, initialism is SOF) partial oxidation is made to become CO
2and H
2o, reduces the size of soot PM, and catalytic combustion, eliminates the factor of its toxicity and harm simultaneously, effectively solves the problem that soot PM exceeds standard.POC preprocessor is advanced carrier and the combination of catalyst technology, and carrier is the most key, not only affects performance, also affects cost and life-span.The treatment effeciency of existing POC preprocessor to soot PM is generally 50% ~ 80%, and blocked rate of fault is also well below wall-flow diesel particulate filter DPF.The POC carrier that the representational Ecocat company of most adopts is the metal honeycomb plate of structure uniqueness and the assemblying body of ultrafine metal fibers weaving felt, and it is expensive, and domestic diesel-oil vehicle is difficult in enormous quantities employing and processes tail gas pollution.
The applicant discloses " a kind of particulate filter carrier of diesel engine " at first patent CN103352742A, it comprises filter body, described filter body is cylindrical body, filter body inside has honeycomb hole, it is characterized in that: the steinheilite of described filter body 84-90wt%, the andalusite of 3-5wt%, the silicon carbide of 2-5wt% and the fibrous carbon ball milling mixing of 5-6wt%, add binder again, it is old after oiling agent and water for ball milling mix, carry out extruded again, dry tack free sizing and high-temperature firing form, active catalyst layer is applied again on the hole wall surface of honeycomb hole, plug is staggeredly equipped with respectively in honeycomb hole two ends, drying makes filter-carrier.To be crisscross arranged respectively in honeycomb hole two ends plug at first patent CN103352742A, honeycomb hole is made to form semienclosed filtration channel, the filter area of particulate in honeycomb hole is increased, adsorption time increases, particulate is captured more and accumulates in not outer row in hole, thus makes dual fuel of diesel engine reach Europe V standard.But its low-temperature catalytic activity and maximum conversion rate have further raising.
Summary of the invention
Technical problem to be solved by this invention is the defect making up above-mentioned prior art, makes further improvement to the applicant at first patent CN103352742A, provides a kind of use for diesel engine metal soot particle filter.
Technical problem of the present invention is solved by the following technical programs.
This use for diesel engine metal soot particle filter, comprises shell, is arranged on the column like catalyst carrier of the one end in described shell facing to the oxidation catalyst of air inlet side assembly, and it is N that described oxidation catalyst is used for the NO catalytic oxidation-reduction in diesel exhaust gas
2o.
The feature of this use for diesel engine metal soot particle filter is:
The column like catalyst carrier of described oxidation catalyst is provided with the metal mesh type soot particle filter comprising wire gaze column carrier outside the other end of side assembly of giving vent to anger, and the NO catalytic oxidation-reduction in diesel exhaust gas is N at described oxidation catalyst by described metal mesh type soot particle filter
2under the catalytic combustion condition that O provides, first soot PM filtered or under the effect of catalyzer, carry out catalytic oxidation and catalytic combustion after retaining, making the soluble organic fraction SOF partial oxidation in soot PM become CO
2and H
2o, reduces the size of soot PM, carries out catalytic combustion simultaneously, eliminate the factor of its toxicity and harm, effectively solves soot PM excessive problem.
Technical problem of the present invention is solved by following further technological scheme.
Described wire gaze column carrier adopts the 310S Stainless Steel Wire ripple net volume that silk screen porosity ratio is 30 order ~ 100 orders, diameter is 0.1mm, wave height is 1.0mm ~ 2.1mm, waviness width is 1.2mm ~ 2.0mm to make 300 order ~ 400 object wire gaze column carriers.
Described 310S Stainless Steel Wire is the high-alloy stainless steel of 25Cr-20Ni system, and high-temperature oxidation is outstanding, maximum operation (service) temperature 1200 DEG C, continuous serviceability temperature 1150 DEG C.
Described metal mesh type carbon soot particles filter, also comprises the counterdie adopting electrophoretic deposition to be prepared in the high caking ability of described wire gaze column carrier surface, and is coated in the soot catalyst for catalytic combustion coating on the counterdie of described high caking ability.
Preferably, the counterdie of described high caking ability is aluminium sesquioxide Al2O3 film.
Described soot catalyst for catalytic combustion, containing the copper-base composite oxidate soot catalyst for catalytic combustion coating of potassium oxide, is the one in Ca-Ti ore type copper-base composite oxidate soot catalyst for catalytic combustion coating and non-Ca-Ti ore type copper-base composite oxidate soot catalyst for catalytic combustion coating.
Preferably, described Ca-Ti ore type copper-base composite oxidate soot catalyst for catalytic combustion coating is perovskite powder La0.8K0.2Cu0.05Mn0.95O3.Perovskite powder La0.8K0.2Cu0.05Mn0.95O3 has and removes soot-NOx simultaneously; Under anaerobic, the initiation temperature that CO and C3H6 generates NO2 and N, soot PM with NO reaction under the effect of catalyzer is 300 DEG C, and the temperature of the complete after-flame of soot PM also only has 438 DEG C, embody this catalyzer and have good PM low-temperature catalytic activity, its maximum conversion rate can reach more than 70%.
Preferably, described non-Ca-Ti ore type copper-base composite oxidate soot catalyst for catalytic combustion coating is non-perovskite powder Cu0.5Ce0.5O.Non-perovskite powder Cu0.5Ce0.5O has a large amount of oxygen vacancies, dispersiveness and the oxygen storage capacity of oxygen atom in solid solution catalyst structure can be improved, there are Cu+ and Cu2+ species simultaneously, for oxidation soot PM and CO provides more activated centre, catalyst activity can be improved further, the initiation temperature of soot PM is reduced to 281 DEG C, and the temperature of the complete after-flame of soot PM also only has 438 DEG C, embody this catalyzer and have good PM low-temperature catalytic activity, its maximum conversion rate can reach more than 70%.
Technical problem of the present invention is solved by following further technological scheme.
The column like catalyst carrier of described oxidation catalyst is the column like catalyst carrier being rich in tin Zirconium solid solution catalyst.
The column like catalyst carrier of described oxidation catalyst, 300 order ~ 400 object cordierite honeycomb ceramic column like catalyst carrier, with the fibrous carbon ball milling mixing of the steinheilite of 84wt% ~ 90wt%, the andalusite of 3wt% ~ 5wt%, the silicon carbide of 2wt% ~ 5wt% and 5wt% ~ 6wt%, add after the mixing of binder, oiling agent and water for ball milling old again, then carry out extruded, dry tack free sizing and high-temperature firing forms; On the hole wall surface of honeycomb hole, apply the active coating of oxidation catalyst again, drying, roasting make oxidation catalyst.
Described air inlet side assembly comprises the filter suction tude of the engine exhaust pipe connected successively, air inlet expanding duct, connects the first metal ring washer of the first flange of air inlet expanding duct, the column like catalyst carrier of fixing described oxidation catalyst, and being arranged on first differential pressure pickup of air inlet expanding duct outer wall of described engine exhaust, the shell of the column like catalyst carrier of described first metal ring washer and described oxidation catalyst is welded and fixed.
Described side assembly of giving vent to anger comprises the connection connected successively and to give vent to anger the second metal ring washer, the expanding duct of giving vent to anger of the second flange of expanding duct, the wire gaze column carrier of fixing described metal mesh type soot particle filter, and steam outlet pipe and be arranged on the second differential pressure pickup of expanding duct outer wall of giving vent to anger, the shell of the wire gaze column carrier of described second metal ring washer and described metal mesh type soot particle filter is welded and fixed.
Described shell is the one in the double casing of single layer enclosure and band thermal insulation layer.
Described shell is SUS409 ferrite stainless outer steel shell and the one in surperficial plain carbon steel shell of aluminizing.
The present invention's beneficial effect is compared with prior art:
Low-temperature catalytic activity of the present invention and maximum conversion rate have further raising, have more the competitive ability of standby technology and economic aspect.
Accompanying drawing explanation
Accompanying drawing is the structural drawing of the specific embodiment of the invention.
Embodiment
Contrast accompanying drawing below in conjunction with embodiment the present invention will be described.
A kind of use for diesel engine metal soot particle filter as shown in drawings, comprise the double-deck SUS409 ferrite stainless outer steel shell of band thermal insulation layer, the column like catalyst carrier 5 of one end in the enclosure facing to the oxidation catalyst of air inlet side assembly is set, the column like catalyst carrier 5 of oxidation catalyst is the 300 order ~ 400 object cordierite honeycomb ceramic column like catalyst carrier being rich in tin Zirconium solid solution catalyst, with the steinheilite of 84wt% ~ 90wt%, the andalusite of 3wt% ~ 5wt%, the silicon carbide of 2wt% ~ 5wt% and the fibrous carbon ball milling mixing of 5wt% ~ 6wt%, add binder again, it is old after oiling agent and water for ball milling mix, carry out extruded again, dry tack free sizing and high-temperature firing form, on the hole wall surface of honeycomb hole, apply the active coating of oxidation catalyst again, drying, roasting make oxidation catalyst.It is N that oxidation catalyst is used for the NO catalytic oxidation-reduction in diesel exhaust gas
2o.
The column like catalyst carrier 5 of oxidation catalyst is provided with to comprise and adopts the metal mesh type soot particle filter that silk screen porosity ratio is 70 orders, diameter is 0.1mm, wave height is 1.5mm, waviness width is the wire gaze column carrier 6 of the 310S high-alloy stainless steel silk ripple net volume system of the 25Cr-20Ni system of 1.6mm outside the other end of side assembly of giving vent to anger, and the NO catalytic oxidation-reduction in diesel exhaust gas is N at oxidation catalyst by metal mesh type soot particle filter
2under the catalytic combustion condition that O provides, first soot PM filtered or under the effect of catalyzer, carry out catalytic oxidation and catalytic combustion after retaining, making the soluble organic fraction SOF partial oxidation in soot PM become CO
2and H
2o, reduces the size of soot PM, carries out catalytic combustion simultaneously, eliminate the factor of its toxicity and harm, effectively solves soot PM excessive problem.The low-temperature catalytic activity of this embodiment and maximum conversion rate have further raising, have more the competitive ability of standby technology and economic aspect.
Metal mesh type soot particle filter, also comprises the aluminium sesquioxide Al adopting electrophoretic deposition to be prepared in wire gaze column carrier 6 surface
2o
3the counterdie of high caking ability, and be coated in aluminium sesquioxide Al
2o
3soot catalyst for catalytic combustion coating on the counterdie of high caking ability.
One in soot catalyst for catalytic combustion coated perovskite type copper-base composite oxidate soot catalyst for catalytic combustion coating and non-Ca-Ti ore type copper-base composite oxidate soot catalyst for catalytic combustion coating.
Ca-Ti ore type copper-base composite oxidate soot catalyst for catalytic combustion coating is perovskite powder La
0.8k
0.2cu
0.05mn
0.95o
3.Perovskite powder La
0.8k
0.2cu
0.05mn
0.95o
3have and remove soot-NOx simultaneously; Under anaerobic, CO and C
3h
6nO is generated with NO reaction under the effect of catalyzer
2with the initiation temperature of N, soot PM is 300 DEG C, and the temperature of the complete after-flame of soot PM also only has 438 DEG C, embodies this catalyzer to have good PM low-temperature catalytic activity, and its maximum conversion rate can reach more than 70%.
Non-Ca-Ti ore type copper-base composite oxidate soot catalyst for catalytic combustion coating is non-perovskite powder Cu
0.5ce
0.5o.Non-perovskite powder Cu
0.5ce
0.5o has a large amount of oxygen vacancies, can improve dispersiveness and the oxygen storage capacity of oxygen atom in solid solution catalyst structure, occur Cu simultaneously
+and Cu
2+species, for oxidation soot PM and CO provides more activated centre, catalyst activity can be improved further, the initiation temperature of soot PM is reduced to 281 DEG C, and the temperature of the complete after-flame of soot PM also only has 438 DEG C, embody this catalyzer and have good PM low-temperature catalytic activity, its maximum conversion rate can reach more than 70%.
The air inlet side assembly of this embodiment comprises the filter suction tude of the engine exhaust pipe connected successively, air inlet expanding duct, connects the first metal ring washer 4 of the first flange 1 of air inlet expanding duct, the column like catalyst carrier 5 of fixing oxidation catalyst, and the first differential pressure pickup 2, first metal ring washer 4 of air inlet expanding duct 3 outer wall being arranged on engine exhaust is welded and fixed with the shell of the column like catalyst carrier 5 of oxidation catalyst.
The side assembly of giving vent to anger of this embodiment comprises the connection connected successively and to give vent to anger the second metal ring washer 7, the expanding duct of giving vent to anger of the second flange 9 of expanding duct, the wire gaze column carrier 6 of secure wire mesh type soot particle filter, and steam outlet pipe is welded and fixed with the shell of the wire gaze column carrier 6 of metal mesh type soot particle filter with the second differential pressure pickup 8, the second metal ring washer 7 being arranged on expanding duct outer wall of giving vent to anger.
Above content is in conjunction with concrete preferred implementation further description made for the present invention, can not assert that specific embodiment of the invention is confined to these explanations.For general technical staff of the technical field of the invention; make some equivalent alternative or obvious modification without departing from the inventive concept of the premise; and performance or purposes identical, all should be considered as belonging to the scope of patent protection that the present invention is determined by submitted to claims.
Claims (10)
1. a use for diesel engine metal soot particle filter, comprises shell, is arranged on the column like catalyst carrier of the one end in described shell facing to the oxidation catalyst of air inlet side assembly, and it is N that described oxidation catalyst is used for the NO catalytic oxidation-reduction in diesel exhaust gas
2o, is characterized in that:
The column like catalyst carrier of described oxidation catalyst is provided with the metal mesh type soot particle filter comprising wire gaze column carrier outside the other end of side assembly of giving vent to anger, and the NO catalytic oxidation-reduction in diesel exhaust gas is N at described oxidation catalyst by described metal mesh type soot particle filter
2under the catalytic combustion condition that O provides, first soot PM filtered or under the effect of catalyzer, carry out catalytic oxidation and catalytic combustion after retaining, making the soluble organic fraction SOF partial oxidation in soot PM become CO
2and H
2o, reduces the size of soot PM, carries out catalytic combustion simultaneously, eliminate the factor of its toxicity and harm, effectively solves soot PM excessive problem.
2. use for diesel engine metal soot particle filter as claimed in claim 1, is characterized in that:
Described wire gaze column carrier adopts the 310S Stainless Steel Wire ripple net volume that silk screen porosity ratio is 30 order ~ 100 orders, diameter is 0.1mm, wave height is 1.0mm ~ 2.1mm, waviness width is 1.2mm ~ 2.0mm to make 300 order ~ 400 object wire gaze column carriers.
3. use for diesel engine metal soot particle filter as claimed in claim 1, is characterized in that:
Described metal mesh type carbon soot particles filter, also comprises the counterdie adopting electrophoretic deposition to be prepared in the high caking ability of described wire gaze column carrier surface, and is coated in the soot catalyst for catalytic combustion coating on the counterdie of described high caking ability.
4. use for diesel engine metal soot particle filter as claimed in claim 3, is characterized in that:
The counterdie of described high caking ability is aluminium sesquioxide Al
2o
3film.
5. use for diesel engine metal soot particle filter as claimed in claim 3, is characterized in that:
Described soot catalyst for catalytic combustion coating is the copper-base composite oxidate soot catalyst for catalytic combustion coating containing potassium oxide, is the one in Ca-Ti ore type copper-base composite oxidate soot catalyst for catalytic combustion coating and non-Ca-Ti ore type copper-base composite oxidate soot catalyst for catalytic combustion coating.
6. use for diesel engine metal soot particle filter as claimed in claim 1, is characterized in that:
The column like catalyst carrier of described oxidation catalyst is the column like catalyst carrier being rich in tin Zirconium solid solution catalyst.
7. use for diesel engine metal soot particle filter as claimed in claim 6, is characterized in that:
The column like catalyst carrier of described oxidation catalyst, 300 order ~ 400 object cordierite honeycomb ceramic column like catalyst carrier, with the fibrous carbon ball milling mixing of the steinheilite of 84wt% ~ 90wt%, the andalusite of 3wt% ~ 5wt%, the silicon carbide of 2wt% ~ 5wt% and 5wt% ~ 6wt%, add after the mixing of binder, oiling agent and water for ball milling old again, then carry out extruded, dry tack free sizing and high-temperature firing forms; On the hole wall surface of honeycomb hole, apply the active coating of oxidation catalyst again, drying, roasting make oxidation catalyst.
8. use for diesel engine metal soot particle filter as claimed in claim 1, is characterized in that:
Described air inlet side assembly comprises the filter suction tude of the engine exhaust pipe connected successively, air inlet expanding duct, connects the first metal ring washer of the first flange of air inlet expanding duct, the column like catalyst carrier of fixing described oxidation catalyst, and being arranged on first differential pressure pickup of air inlet expanding duct outer wall of described engine exhaust, the shell of the column like catalyst carrier of described first metal ring washer and described oxidation catalyst is welded and fixed.
9. use for diesel engine metal soot particle filter as claimed in claim 1, is characterized in that:
Described side assembly of giving vent to anger comprises the connection connected successively and to give vent to anger the second metal ring washer, the expanding duct of giving vent to anger of the second flange of expanding duct, the wire gaze column carrier of fixing described metal mesh type soot particle filter, and steam outlet pipe and be arranged on the second differential pressure pickup of expanding duct outer wall of giving vent to anger, the shell of the wire gaze column carrier of described second metal ring washer and described metal mesh type soot particle filter is welded and fixed.
10., as the use for diesel engine metal soot particle filter in claim 1 to 9 as described in any one, it is characterized in that:
Described shell is the one in the double casing of single layer enclosure and band thermal insulation layer;
Described shell is SUS409 ferrite stainless outer steel shell and the one in surperficial plain carbon steel shell of aluminizing.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410852304.0A CN104632329A (en) | 2014-12-31 | 2014-12-31 | Metal soot particle filter for diesel engine |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410852304.0A CN104632329A (en) | 2014-12-31 | 2014-12-31 | Metal soot particle filter for diesel engine |
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| Publication Number | Publication Date |
|---|---|
| CN104632329A true CN104632329A (en) | 2015-05-20 |
Family
ID=53211490
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201410852304.0A Pending CN104632329A (en) | 2014-12-31 | 2014-12-31 | Metal soot particle filter for diesel engine |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108104909A (en) * | 2017-12-27 | 2018-06-01 | 高飞 | A kind of vehicle exhaust three-level filter device |
| CN108704390A (en) * | 2018-06-15 | 2018-10-26 | 西安菲尔特金属过滤材料有限公司 | A kind of high temperature denitration dust collecting integral metallic fiber filter material and preparation method thereof |
| CN111878198A (en) * | 2020-06-30 | 2020-11-03 | 同济大学 | Internal combustion engine exhaust aftertreatment system and application thereof |
| WO2023016489A1 (en) * | 2021-08-11 | 2023-02-16 | Basf Corporation | Particulate filter having partially coated catalytic layer |
-
2014
- 2014-12-31 CN CN201410852304.0A patent/CN104632329A/en active Pending
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108104909A (en) * | 2017-12-27 | 2018-06-01 | 高飞 | A kind of vehicle exhaust three-level filter device |
| CN108704390A (en) * | 2018-06-15 | 2018-10-26 | 西安菲尔特金属过滤材料有限公司 | A kind of high temperature denitration dust collecting integral metallic fiber filter material and preparation method thereof |
| CN108704390B (en) * | 2018-06-15 | 2021-07-06 | 西安菲尔特金属过滤材料股份有限公司 | High-temperature denitration and dust removal integrated metal fiber filtering material and preparation method thereof |
| CN111878198A (en) * | 2020-06-30 | 2020-11-03 | 同济大学 | Internal combustion engine exhaust aftertreatment system and application thereof |
| WO2023016489A1 (en) * | 2021-08-11 | 2023-02-16 | Basf Corporation | Particulate filter having partially coated catalytic layer |
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