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CN207161179U - Exhausted gas post-processing system - Google Patents

Exhausted gas post-processing system Download PDF

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Publication number
CN207161179U
CN207161179U CN201490001537.3U CN201490001537U CN207161179U CN 207161179 U CN207161179 U CN 207161179U CN 201490001537 U CN201490001537 U CN 201490001537U CN 207161179 U CN207161179 U CN 207161179U
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CN
China
Prior art keywords
trap
processing system
scr catalyst
exhausted gas
gas post
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Expired - Lifetime
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CN201490001537.3U
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Chinese (zh)
Inventor
贝赫纳姆·巴赫拉米
查宇慧
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Comings Emission Treatment Co
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Comings Emission Treatment Co
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Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01N—GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR MACHINES OR ENGINES IN GENERAL; GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR INTERNAL COMBUSTION ENGINES
    • F01N3/00—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust
    • F01N3/08—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for rendering innocuous
    • F01N3/10—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for rendering innocuous by thermal or catalytic conversion of noxious components of exhaust
    • F01N3/18—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for rendering innocuous by thermal or catalytic conversion of noxious components of exhaust characterised by methods of operation; Control
    • F01N3/20—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for rendering innocuous by thermal or catalytic conversion of noxious components of exhaust characterised by methods of operation; Control specially adapted for catalytic conversion ; Methods of operation or control of catalytic converters
    • F01N3/2066—Selective catalytic reduction [SCR]
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01N—GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR MACHINES OR ENGINES IN GENERAL; GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR INTERNAL COMBUSTION ENGINES
    • F01N3/00—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust
    • F01N3/08—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for rendering innocuous
    • F01N3/0807—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for rendering innocuous by using absorbents or adsorbents
    • F01N3/0828—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for rendering innocuous by using absorbents or adsorbents characterised by the absorbed or adsorbed substances
    • F01N3/085—Sulfur or sulfur oxides
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01N—GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR MACHINES OR ENGINES IN GENERAL; GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR INTERNAL COMBUSTION ENGINES
    • F01N13/00—Exhaust or silencing apparatus characterised by constructional features ; Exhaust or silencing apparatus, or parts thereof, having pertinent characteristics not provided for in, or of interest apart from, groups F01N1/00 - F01N5/00, F01N9/00, F01N11/00
    • F01N13/009—Exhaust or silencing apparatus characterised by constructional features ; Exhaust or silencing apparatus, or parts thereof, having pertinent characteristics not provided for in, or of interest apart from, groups F01N1/00 - F01N5/00, F01N9/00, F01N11/00 having two or more separate purifying devices arranged in series
    • F01N13/0093—Exhaust or silencing apparatus characterised by constructional features ; Exhaust or silencing apparatus, or parts thereof, having pertinent characteristics not provided for in, or of interest apart from, groups F01N1/00 - F01N5/00, F01N9/00, F01N11/00 having two or more separate purifying devices arranged in series the purifying devices are of the same type
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01N—GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR MACHINES OR ENGINES IN GENERAL; GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR INTERNAL COMBUSTION ENGINES
    • F01N2450/00—Methods or apparatus for fitting, inserting or repairing different elements
    • F01N2450/30—Removable or rechangeable blocks or cartridges, e.g. for filters
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01N—GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR MACHINES OR ENGINES IN GENERAL; GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR INTERNAL COMBUSTION ENGINES
    • F01N2470/00—Structure or shape of gas passages, pipes or tubes
    • F01N2470/20—Dimensional characteristics of tubes, e.g. length, diameter
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01N—GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR MACHINES OR ENGINES IN GENERAL; GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR INTERNAL COMBUSTION ENGINES
    • F01N2510/00—Surface coverings
    • F01N2510/06—Surface coverings for exhaust purification, e.g. catalytic reaction
    • F01N2510/063—Surface coverings for exhaust purification, e.g. catalytic reaction zeolites
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01N—GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR MACHINES OR ENGINES IN GENERAL; GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR INTERNAL COMBUSTION ENGINES
    • F01N2510/00—Surface coverings
    • F01N2510/06—Surface coverings for exhaust purification, e.g. catalytic reaction
    • F01N2510/068—Surface coverings for exhaust purification, e.g. catalytic reaction characterised by the distribution of the catalytic coatings
    • F01N2510/0682—Surface coverings for exhaust purification, e.g. catalytic reaction characterised by the distribution of the catalytic coatings having a discontinuous, uneven or partially overlapping coating of catalytic material, e.g. higher amount of material upstream than downstream or vice versa
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01N—GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR MACHINES OR ENGINES IN GENERAL; GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR INTERNAL COMBUSTION ENGINES
    • F01N2510/00—Surface coverings
    • F01N2510/06—Surface coverings for exhaust purification, e.g. catalytic reaction
    • F01N2510/068—Surface coverings for exhaust purification, e.g. catalytic reaction characterised by the distribution of the catalytic coatings
    • F01N2510/0684—Surface coverings for exhaust purification, e.g. catalytic reaction characterised by the distribution of the catalytic coatings having more than one coating layer, e.g. multi-layered coatings
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01N—GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR MACHINES OR ENGINES IN GENERAL; GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR INTERNAL COMBUSTION ENGINES
    • F01N2560/00—Exhaust systems with means for detecting or measuring exhaust gas components or characteristics
    • F01N2560/06—Exhaust systems with means for detecting or measuring exhaust gas components or characteristics the means being a temperature sensor
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01N—GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR MACHINES OR ENGINES IN GENERAL; GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR INTERNAL COMBUSTION ENGINES
    • F01N2560/00—Exhaust systems with means for detecting or measuring exhaust gas components or characteristics
    • F01N2560/08—Exhaust systems with means for detecting or measuring exhaust gas components or characteristics the means being a pressure sensor
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01N—GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR MACHINES OR ENGINES IN GENERAL; GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR INTERNAL COMBUSTION ENGINES
    • F01N2610/00—Adding substances to exhaust gases
    • F01N2610/14—Arrangements for the supply of substances, e.g. conduits
    • F01N2610/1453—Sprayers or atomisers; Arrangement thereof in the exhaust apparatus
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01N—GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR MACHINES OR ENGINES IN GENERAL; GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR INTERNAL COMBUSTION ENGINES
    • F01N3/00—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust
    • F01N3/08—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for rendering innocuous
    • F01N3/0807—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for rendering innocuous by using absorbents or adsorbents
    • F01N3/0871—Regulation of absorbents or adsorbents, e.g. purging
    • F01N3/0885—Regeneration of deteriorated absorbents or adsorbents, e.g. desulfurization of NOx traps
    • 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
    • Y02T—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
    • Y02T10/00—Road transport of goods or passengers
    • Y02T10/10—Internal combustion engine [ICE] based vehicles
    • Y02T10/12—Improving ICE efficiencies

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  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Health & Medical Sciences (AREA)
  • Toxicology (AREA)
  • Exhaust Gas After Treatment (AREA)

Abstract

Disclose exhausted gas post-processing system.Example exhausted gas post-processing system includes explosive motor and SCR catalyst, and the SCR catalyst is positioned in the exhaust steam passage for being operatively connectable to explosive motor.Decompose pipe to be positioned in the exhaust steam passage of the upstream of SCR catalyst, and reducing agent dispenser is configured to reducing agent being expelled to and decomposed in pipe.SO3Trap is positioned in the upstream of decomposition pipe and in the exhaust steam passage in the downstream of explosive motor.SO3Trap is configured to optionally capture the SO in the waste gas for flowing through exhaust steam passage3。

Description

Exhausted gas post-processing system
Technical field
The application relates generally to be used for the exhausted gas post-processing system (exhaust being used together with internal combustion (IC) engine aftertreatment system)。
Background technology
Sulfur content in diesel fuel has been substantially reduced due to increasingly stricter environment regulations in most of market. However, some countries also do not implement strict sulfur content limitation using section throughout all.In addition, compared to open-road applications, Off-highway application and the application of some oceans allow generally for the fuel compared with high sulfur content.
During combustion process in I/C engine (for example, diesel fuel-powered engine), sulphur is as various oxysulfides (SOx) formed simultaneously with carbon monoxide (CO) and hydrocarbon (HC).It typically, there are the SO in waste gasxThe 97-99% of total amount include Sulfur dioxide (SO2) and 1-3% include sulfur trioxide (SO3).Therefore, have compared with high sulfur content fuel tend to produce compared with The SO of a large amount3.For example, the fuel of the sulfur content with 1000ppm can form about 1-3ppm SO3。
Exhausted gas post-processing system is used to receive and handle the waste gas as caused by I/C engine.Conventional exhaust after-treatment system System includes any of some different parts, to reduce the level for the harmful exhaust emissions thing being present in waste gas.For example, Some exhausted gas post-processing systems for diesel I/C engine include SCR (SCR) catalyst, by NOx (it is NO and NO in some fractions2) in ammonia (NH3) in the presence of change into harmless nitrogen (N2) and vapor (H2O)。
SO3It can be reacted with ammonia to produce ammonium sulfate ((NH4)2SO4) and ammonium hydrogen sulfate (NH4HSO4).Locate after some waste gas It is especially sensitive for the pollution from ammonium sulfate and ammonium hydrogen sulfate that component, which is managed, such as based on the catalyst of vanadium.From ammonium sulfate Pollution with ammonium hydrogen sulfate can trigger diagnostic error code and/or inactivate exhaust after-treatment component.
Utility model content
Various embodiments are related to including SO3The exhausted gas post-processing system of trap.Exhausted gas post-processing system is sent out including IC Motivation and SCR catalyst, the SCR catalyst, which is positioned at, to be operatively connectable in the exhaust steam passage of IC engines.Decompose Guan Ding In the exhaust steam passage in the upstream of SCR catalyst, and reducing agent dispenser (reductant doser) be configured to by Reducing agent, which is expelled to, to be decomposed in pipe.SO3Trap is positioned in the upstream of decomposition pipe and in the waste gas in the downstream of I/C engine In passage.SO3Trap is configured to optionally capture the SO in the waste gas for flowing through exhaust steam passage3。
Another example embodiment is related to the method for processing waste gas.Receive and give up from explosive motor via exhaust steam passage Gas.Via the SO being positioned in exhaust steam passage3Trap optionally captures SO from waste gas3.Reducing agent is expelled to positioning In in SO3In decomposition pipe in the exhaust steam passage in the downstream of trap.Waste gas, SCR catalyst positioning are handled with SCR catalyst In in the exhaust steam passage in downstream of pipe is decomposed.
The utility model further relates to herein below：
1) a kind of exhausted gas post-processing system, including：
Explosive motor；
SCR (SCR) catalyst, it is positioned at the waste gas for being operatively connectable to the explosive motor In passage；
Pipe is decomposed, it is positioned in the exhaust steam passage of the upstream of the SCR catalyst,
Reducing agent dispenser, it is configured to reducing agent being expelled in the decomposition pipe；And
Sulfur trioxide (SO3) trap, it is positioned in the upstream of the decomposition pipe and in the explosive motor In the exhaust steam passage in downstream, the SO3Trap, which is configured to optionally capture, is flowing through the exhaust steam passage SO in waste gas3。
2) exhausted gas post-processing system as described in 1), wherein, the explosive motor is diesel explosive motor, institute Diesel explosive motor is stated to be configured to use the diesel fuel with least 350ppm sulfur content to operate.
3) exhausted gas post-processing system as described in 1), wherein, the SO3Trap is configured to urge substantially prevented from SCR Agent inactivates.
4) exhausted gas post-processing system as described in 3), wherein, it is described to include preventing shape substantially prevented from SCR catalyst inactivation Into ammonium sulfate and ammonium hydrogen sulfate.
5) exhausted gas post-processing system as described in 1), wherein, the SO3Trap be configured to it is disposable, it is described SO3Trap is alternatively attached to the exhaust steam passage, and the SO3Trap can be after service life from institute State in exhausted gas post-processing system and remove.
6) exhausted gas post-processing system as described in 1), in addition to aftertreatment controller, the aftertreatment controller are configured to EGT is controlled to cause the SO3The on-line regeneration of trap.
7) exhausted gas post-processing system as described in 6), wherein, the aftertreatment controller is configured to predetermined Interval causes the SO3The on-line regeneration of trap.
8) exhausted gas post-processing system as described in 6), wherein, the aftertreatment controller is configured to be based on exhaust gas conditions Cause the SO3The on-line regeneration of trap.
9) exhausted gas post-processing system as described in 8), wherein, the exhaust gas conditions are included in the SO3Trap it is upper Swim the first pressure of the waste gas of measurement and in the SO3The downstream of trap and it is described decomposition pipe upstream measurement The second pressure of the waste gas.
10) exhausted gas post-processing system as described in 9), wherein, the exhaust gas conditions are additionally included in the SO3Trap Upstream measurement the waste gas the first temperature and in the SO3The downstream of trap and it is described decomposition pipe upstream measurement The waste gas second temperature.
11) exhausted gas post-processing system as described in 1), wherein, the SO3Trap includes the substrate of extrusion.
12) exhausted gas post-processing system as described in 1), wherein, the SO3Trap includes the base coated with washcoat Bottom.
13) exhausted gas post-processing system as described in 1), wherein, the SCR catalyst is the first SCR catalyst, and its In, the SO3Trap is formed in second SCR catalyst by the first area of the SCR catalyst of region coating second, Second SCR catalyst also includes the second area for being configured as SCR catalyst operation, and wherein, the 2nd SCR Catalyst is included in vanadium oxide catalyst, Cu- zeolite catalysts, Fe- zeolite catalysts and mixed oxide catalyst at least It is a kind of.
14) exhausted gas post-processing system as described in 1), wherein, the SCR catalyst is the first SCR catalyst, and its In, the SO3Trap coats the second SCR catalyst by layer and formed in second SCR catalyst so that described second SCR catalyst includes first layer, and the first layer includes at least one of following SCR catalyst：Vanadium oxide is catalyzed Agent, Cu- zeolite catalysts, Fe- zeolite catalysts and mixed oxide catalyst, second SCR catalyst also include coating The second layer of the first layer, the second layer include the SO3Trap.
These and other feature, when read in conjunction with the accompanying drawings will be from described in detail below together with the tissue and mode of its operation In become obvious, wherein identical element has identical digital through some accompanying drawings described below.
Brief description of the drawings
Fig. 1 is the schematic diagram of exemplary conventional exhausted gas post-processing system.
Fig. 2 is to include SO3The schematic diagram of another example exhausted gas post-processing system of trap.
Fig. 3 is to include SO3The schematic diagram of trap and another example exhausted gas post-processing system of post processing control module.
Fig. 4 is the block diagram for controlling the control system of exhausted gas post-processing system.
Embodiment
Fig. 1 is that exemplary conventional I/C engine 100 (does not show with the exhaust manifold for being fluidly coupled to I/C engine 100 Go out) exhausted gas post-processing system 102 schematic diagram.According to each embodiment, I/C engine 100 can be compression ignition type I/C engine, such as the engine of diesel oil or the gas fuel of compression, or spark ignition type internal combustion engine (spark- Ignited internal combustion engine), such as the engine of the Fuel Petroleum of operation lean.In the operation phase Between, I/C engine 100 discharges waste gas, and the downstream flow of the waste gas from I/C engine 100 passes through including exhausted gas post-processing system 102 exhaust steam passage 104.Generally, exhausted gas post-processing system 102 is configured to remove the various chemistry discharges being present in waste gas Thing and particle emission.
Exhausted gas post-processing system 102 includes SCR catalyst 106.SCR catalyst 106 is configured to NOxIn the presence of ammonia Under be reduced into smaller harmful emission, such as N2And H2O.Because ammonia is not the natural by-product of combustion process, ammonia is necessary Artificially it is introduced into before waste gas enters SCR catalyst in waste gas.Generally, ammonia is not expelled in waste gas directly, and this is Due to the security consideration associated with the storage of liquid ammonia.Therefore, exhausted gas post-processing system 102 includes dispenser 108, dispenser 108 are configured to diesel exhaust fluid (diesel exhaust fluid) (DEF) being expelled in waste gas, diesel emission Fluid is typically aqueous solution of urea, and in the offgas, aqueous solution of urea decomposes ammonification.Especially, dispenser 108 be configured to by DEF, which is expelled to, to be decomposed in pipe 110, and this is advantageous to DEF decomposing ammonification.
The urea that typically, there are in DEF resolves into gaseous ammonia in three phases.First, Urea Evaporation or and waste gas Mixing.Second, the temperature of waste gas causes the phase transformation of urea and urea is resolved into isocyanic acid (HNCO) and water.3rd, isocyanide It is sour to be reacted with water under specified pressure and temperature concentration in hydrolytic process, to decompose ammonification and carbon dioxide (CO2).Then will Ammonia is introduced at the inlet face of SCR catalyst 106, flows through catalyst, and in NOxConsumed in reduction process.Leave SCR Any ammonia (for example, " NH_3 leakage (ammonia slip) ") not consumed of catalyst 106 can use ammoxidation catalyst (not Show) it is reduced to N2And other smaller harmful or smaller poisonous components.
As stated, waste gas, especially with high sulfur content from the I/C engine operated by diesel fuel 100 waste gas, various horizontal oxysulfides, including SO can be included3。SO3Can be anti-with ammonia (for example, by DEF decomposition) Should, to produce ammonium sulfate ((NH by following chemical reaction4)2SO4) and ammonium hydrogen sulfate (NH4HSO4)：
2NH3+SO3+H2O→(NH4)2SO4 (1)
NH3+SO3+H2O→NH4HSO4 (2)
Some exhaust after-treatment components, such as SCR catalyst and diesel oxidation catalyst (DOC), for from ammonium sulfate Pollution with ammonium hydrogen sulfate is especially sensitive, and this can trigger diagnostic (for example, (OBD) diagnostic on plate), and error code is simultaneously And lower engine performance.Especially, the SCR catalyst based on vanadium and DOC are for the pollution from ammonium sulfate and ammonium hydrogen sulfate It is particularly sensitive.In fact, for operating some markets with high sulfur-containing diesel fuel (for example, China, Russia, Malaysia West Asia and Indonesia) diesel engine, made due to forming ammonium sulfate and ammonium hydrogen sulfate in the SCR catalyst based on vanadium Into SCR catalyst inactivation, be post-process deactivation prob main source in one.Due to wherein SO mentioned above3 Reacted with ammonia to produce these reactions of ammonium sulfate and ammonium hydrogen sulfate, it is necessary that minimize unreacted ammonia (for example, ammonia is let out Leakage) amount and/or the SO in the waste gas of the upstream of SCR catalyst 1063Amount, to minimize ammonium sulfate and ammonium hydrogen sulfate Formed.
Present disclosure is related to the SO for the upstream for being positioned at SCR catalyst3Trap.SO3Trap is configured to selectivity Ground traps and includes the SO from waste gas3, substantially or completely to prevent from forming ammonium sulfate and ammonium hydrogen sulfate.SO3Trapping Device is well suited for being used for the application that wherein diesel fuel tends to include high-caliber sulphur (for example, 350ppm or higher).Base In extensive Engine test data, it has been determined that, the horizontal fuel of the sulphur with 350ppm or higher may be due to sulphur The formation of sour ammonium and ammonium hydrogen sulfate and cause SCR to inactivate.
Fig. 2 is located according to example embodiment, I/C engine 200 and after being fluidly coupled to the waste gas of engine 200 The schematic diagram of reason system 202.Similar to Fig. 1 exhausted gas post-processing system 102, exhausted gas post-processing system 202 is useless including being positioned at SCR catalyst 206 and the dispenser 208 for being configured to be expelled to DEF in decomposition pipe 210, the decomposition pipe in gas passage 204 210 are positioned at the upstream of SCR catalyst 206.However, Fig. 2 exhausted gas post-processing system 202 also includes SO3Trap 212, The SO3Trap 212 is positioned at the downstream and dispenser 208 and the respective upstream for decomposing pipe 210 of engine 200.Each In individual embodiment, depending on application and engine flat, SO3Trap 212 may be mounted in exhaust steam passage 204, in whirlpool Between turbine output section (not shown) and decomposition pipe 210.SO3Trap 212 is configured to high selectivity so that its Other compounds such as SO2、NOx, optionally trap SO in the presence of PM etc.3。
By by SO3Trap 212 is positioned at the respective upstream for decomposing pipe 210 and dispenser 208, is present in waste gas Any SO3In SO3By SO before being contacted with ammonia3Trap 212 is trapped, and the ammonia is converted by being assigned to the DEF decomposed in pipe 210. By preventing SO3Reacted with ammonia, therefore prevent the formation of ammonium sulfate and ammonium hydrogen sulfate.Therefore, SO3Trap 212 prevents SCR from urging Agent 206 is inactivated due to pollution/formation of ammonium sulfate and ammonium hydrogen sulfate.
According to each example embodiment, SO3Trap 212 includes the substrate (extruded substrate) of extrusion. In this kind of embodiment, catalyst can be incorporated in whole substrate (for example, homogeneous).In other examples embodiment In, SO3Trap 212 includes the substrate of coating.In this kind of embodiment, catalyst is applied in substrate (for example, conduct Washcoat (washcoat)).According to each embodiment, SO3The catalyst of trap 212 can include mixed oxide material Material, the mixed oxide material include various alkali metal (for example, Na and K), alkaline-earth metal (for example, Ca, Ba and Mg) and transition At least one of metal (for example, Co, Mn, Cr, Zr and Ni).
In some example embodiments, SCR catalyst 206 is the first SCR catalyst, and SO3The shape of trap 212 Into in the second SCR catalyst.According to each embodiment, the 2nd SCR catalyst includes vanadium oxide catalyst, Cu- zeolites are urged At least one of agent, Fe- zeolite catalysts and mixed oxide catalyst.In an example, SO3Trap 212 is logical The first area for crossing the SCR catalyst of region coating second is formed in the second SCR catalyst.In this example, first area will As SO3Trap operates and second area will be used as SCR catalyst operation.In another example, SO3Trap passes through Layer the second SCR catalyst of coating is formed in the second SCR catalyst.In this example, first layer is as SCR catalyst operation, And the second layer of first layer is coated as SO3Trap operates.
As mentioned above, the SO in diesel exhaust3Amount compared to other exhaust emissions (for example, SO2、NOx、PM Deng) it is relatively low.Because SO3Trap 212 is configured to optionally trap SO3And other compounds are not trapped, than Such as SO2、NOx, PM etc., so SO3Trap 212 can be dimensionally relatively small, while have enough capacity with it It must be replaced or continue before regenerating the time (for example, service life of engine 200) significantly grown.In exemplary embodiment party In case, SO3Trap 212 is the disposable trap for being alternatively attached to exhaust steam passage 204.In this kind of embodiment party In case, SO3Trap 212 can remove (example after operation continues specific operation lifetime from exhausted gas post-processing system 202 Such as, exhaust steam passage 204 is departed from).After being removed from exhausted gas post-processing system 202, SO3Trap 212 can easily by New SO3Trap 212 is replaced.According to each embodiment, SO3Trap 212 can be with any number of suitable connection skill Art is attached to exhaust steam passage 204, such as by by SO3Matched flange on trap 212 and exhaust steam passage 204 are each is fastened Together, or by SO3Trap is threadably attached to exhaust steam passage 204, and other connection techniques.In some example embodiment party In case, SO3Trap 212, which is configured to operate before needing to replace it, continues relatively long operation lifetime (for example, 100,000 Mile).In other example embodiments, SO3Trap 212 is configured to operation and continues relatively short operation lifetime (for example, 5,000 miles), in this case, SO3Trap 212 is arranged to relatively low cost.
In other example embodiments, SO is stored in3SO in trap 2123Periodically removed, or change speech It, SO3Trap 212 is by " regeneration ".According to example embodiment, SO3Trap 212 is specific by the way that waste gas is heated to above Temperature is with by SO3From SO3Discharged in trap 212 and carry out on-line regeneration.On-line regeneration (online regeneration) refers to Make SO3Trap 212 regenerates, without removing SO from exhausted gas post-processing system 2023Trap.According to example embodiment, lead to Celebrate a festival the excessive fuel of stream air inlet, adjustment waste gas recovery (EGR) speed, injection and by using electric heating system and Other modes, EGT can be raised to start on-line regeneration.In some example embodiments, regenerate according to fixed Plan carries out (for example, every 5,000 mile).However, other embodiments include post processing control module, it is using from each The measurement result of individual sensor (for example, temperature sensor and pressure sensor) is to be advantageous to initiative regeneration (active regeneration)。
Fig. 3 is located according to example embodiment, I/C engine 300 and after being fluidly coupled to the waste gas of engine 300 The schematic diagram of reason system 302.Similar to Fig. 2 exhausted gas post-processing system 202, exhausted gas post-processing system 302 is useless including being positioned at SCR catalyst 306 in gas passage 304, it is configured to for DEF to be expelled to the decomposition pipe 310 positioned at the upstream of SCR catalyst 306 In DEF dispensers 308 and be positioned at engine 300 downstream and DEF dispensers 308 and decompose pipe 310 it is respective The SO of upstream3Trap 312.Fig. 3 exhausted gas post-processing system 302 also includes post processing control module 316, post processing control Module 316 is operatively coupled to I/C engine 300 and is attached to each sensor, to control exhausted gas post-processing system 302. In some instances, post processing control module 316 is configured to control exhaust gas parameters (for example, EGT), to start SO3Catch The on-line regeneration of storage 312.For example, post processing control module 316 can pass through the air inlet that throttles, adjustment waste gas recovery (EGR) the excessive fuel of speed, injection and EGT is caused to raise by using electric heating system and other modes To start on-line regeneration.In some instances, DEF dispensers are attached to post-processing the being further operable property of control module 316 308, to control DEF dispensers 308 that DEF is expelled into the delivery rate decomposed in pipe 310.According to each example embodiment, It can be independent electronic control module to post-process control module 316, or can be merged in engine control module (ECM), pass In defeated control module (TCM) or other electronic control modules.
According to example embodiment, exhausted gas post-processing system 302 also includes the various sensors of measurement exhaust gas conditions, such as First temperature sensor 318 and second temperature sensor 320, first temperature sensor 318 are oriented to measurement and flowed through SO3First temperature of the waste gas of the exhaust steam passage 304 of the upstream of trap 312, the second temperature sensor 320 are oriented to survey Amount is in SO3The downstream of trap 312 and decompose pipe 310 upstream waste gas second temperature.Exhausted gas post-processing system 302 also include first pressure sensor 322 and second pressure sensor 324, and the first pressure sensor 322 is oriented to survey Amount is in SO3The first pressure of the waste gas of the upstream of trap 312, the second pressure sensor 324 are oriented to measurement in SO3Catch The downstream of storage 312 and decompose pipe 310 upstream waste gas second pressure.In certain embodiments, post processing control Molding block 316 is based on the first temperature and second temperature and based on first pressure and second pressure and other state modulator SO3The regeneration of trap 312.For example, such as by first pressure sensor 322 and second pressure sensor 324 measure across SO3The High Pressure Difference of trap 312, it can indicate, SO3Trap 312 is full and must regenerated.
Fig. 4 is the block diagram for being used to control the control system of exhausted gas post-processing system according to example embodiment.After waste gas Processing control system includes controller 400, and the controller 400 is configured to carry out some operations to control SO3Trap (for example, Fig. 3 SO3Trap 312) regeneration.In certain embodiments, controller 400 forms a part for processing subsystem, should Processing subsystem includes one or more computing devices with memory, processing hardware and communication hardware.Controller 400 can To be single assembly (for example, Fig. 3 post processing control module 316) or distribution apparatus, and the function of controller 400 can be with Carried out by hardware and/or the computer instruction being used as in non-transitory computer-readable storage media.
Controller 400 can include microprocessor, application specific integrated circuit (ASIC), field programmable gate array (FPGA) Deng or its combination.Controller 400 can include memory, and the memory can include but is not limited to, using the teaching of the invention it is possible to provide programmed instruction To the electronic installation of processor, ASIC, FPGA etc., Optical devices, magnetic devices or any other storage or transmitting device.Deposit Reservoir can include storage chip, Electrically Erasable Read Only Memory that controller 400 can read instruction therefrom (EEPROM), Erasable Programmable Read Only Memory EPROM (EPROM), flash memory or any other suitable memory.Instruction The code from any suitable programming language can be included.
In certain embodiments, controller 400 include be configured to functionally perform controller one of operation or More modules.As shown in FIG. 4, controller 400 can include being configured to measure each useless in exhausted gas post-processing system One or more measurement modules 402 of gas bar part.In certain embodiments, one or more measurement modules 402 can To be configured to determine exhaust gas conditions, include but is not limited to, in SO3First temperature of the waste gas of the upstream of trap, in SO3Catch The downstream of storage and decompose pipe upstream waste gas second temperature, in SO3First pressure of the waste gas of the upstream of trap Power and in SO3The downstream of trap and decompose pipe upstream waste gas second pressure.
In certain embodiments, controller 400 also includes exhaust after-treatment control module 404, the exhaust after-treatment control Molding block 404 is communicably coupled at least one measurement module 402.Exhaust after-treatment control module 404 is configured to based on useless Gas measurement signal such as the first temperature and second temperature and first pressure and second pressure and other measurement signals, accurately Ground control exhaust gas parameters (for example, temperature).For example, post processing control module 404 can pass through the air inlet that throttles, adjustment waste gas Recovery (EGR) speed, inject excessive fuel and cause EGT by using electric heating system and other modes Raise to start on-line regeneration.
It should be noted that the term " example " and " exemplary " as being used to describe each embodiment herein are intended to refer to, it is this kind of Embodiment is the possible example of possible embodiment, (and this kind of term is not intended to mean for representative and/or illustration This kind of embodiment must be special or fabulous example).
The independence of structure of each side of controller, and the operation of illustration controller are emphasized in description including module herein With one kind packet of responsibility.The other packets for performing similar total operation are understood within the scope of application.Module can To implement within hardware and/or as the computer instruction in non-transitory computer-readable storage media, and module can To be distributed across each hardware or computer based part.The more specifically description quilt of some embodiments of controller operation It is included in the part for referring to Fig. 3.Example and nonrestrictive module, which implement element, to be included providing any value determined herein Sensor, provide be the value determined herein predecessor any value sensor, data link and/or the network hardware, bag Include communication chip, oscillating crystal, communication link, cable, twisted-pair feeder wiring (twisted pair wiring), coaxial wiring (coaxial wiring), shield wiring (shielded wiring), emitter, receiver and/or transceiver, logic circuit, Hard-wired logic (hard-wired logic circuit), according to module specification configure in specific non-provisional shape The reconfigurable logic circuit (reconfigurable logic circuit) of state including at least electric actuator, hydraulic pressure Any actuator of actuator or pneumatic actuator, solenoid, operational amplifier (op-amp), simulation control element (spring (spring), wave filter, integrator, adder, divider, booster element) and/or digital controling element.
Although each embodiment of present disclosure has been shown and described, it should be appreciated that these embodiments are not It is limited to this.Embodiment can be applied by those skilled in the art's changes, modifications and further.Therefore, these embodiments are not It is limited to details be previously shown and description, but also includes all such changes and modification.

Claims (15)

1. a kind of exhausted gas post-processing system, including：
Explosive motor；
SCR (SCR) catalyst, it is positioned at the exhaust steam passage for being operatively connectable to the explosive motor In；
Pipe is decomposed, it is positioned in the exhaust steam passage of the upstream of the SCR catalyst,
Reducing agent dispenser, it is configured to reducing agent being expelled in the decomposition pipe；And
Sulfur trioxide (SO3) trap, it is positioned in the upstream of the decomposition pipe and in the downstream of the explosive motor In the exhaust steam passage, the SO3Trap is configured to optionally capture in the waste gas for flowing through the exhaust steam passage SO3。
2. exhausted gas post-processing system as claimed in claim 1, wherein, the explosive motor is diesel internal-combustion engine Machine, the diesel explosive motor are configured to use the diesel fuel with least 350ppm sulfur content to operate.
3. exhausted gas post-processing system as claimed in claim 1, wherein, the SO3Trap is configured to substantially prevented from SCR Catalyst inactivation.
4. exhausted gas post-processing system as claimed in claim 3, wherein, it is described to include preventing substantially prevented from SCR catalyst inactivation Only form ammonium sulfate and ammonium hydrogen sulfate.
5. exhausted gas post-processing system as claimed in claim 1, wherein, the SO3Trap is configured to disposable, institute State SO3Trap is alternatively attached to the exhaust steam passage, and the SO3Trap can after service life from Removed in the exhausted gas post-processing system.
6. exhausted gas post-processing system as claimed in claim 1, in addition to aftertreatment controller, the aftertreatment controller configuration Into control EGT to cause the SO3The on-line regeneration of trap.
7. exhausted gas post-processing system as claimed in claim 6, wherein, the aftertreatment controller is configured to predefine Interval cause the SO3The on-line regeneration of trap.
8. exhausted gas post-processing system as claimed in claim 6, wherein, the aftertreatment controller is configured to be based on waste gas bar Part causes the SO3The on-line regeneration of trap.
9. exhausted gas post-processing system as claimed in claim 8, wherein, the exhaust gas conditions are included in the SO3Trap it is upper Swim the first pressure of the waste gas of measurement and in the SO3The downstream of trap and it is described decomposition pipe upstream measurement The second pressure of the waste gas.
10. exhausted gas post-processing system as claimed in claim 9, wherein, the exhaust gas conditions are additionally included in the SO3Trap Upstream measurement the waste gas the first temperature and in the SO3The downstream of trap and it is described decomposition pipe upstream survey The second temperature of the waste gas of amount.
11. exhausted gas post-processing system as claimed in claim 1, wherein, the SO3Trap includes the substrate of extrusion.
12. exhausted gas post-processing system as claimed in claim 1, wherein, the SO3Trap is included coated with washcoat Substrate.
13. exhausted gas post-processing system as claimed in claim 1, wherein, the SCR catalyst is the first SCR catalyst, and Wherein, the SO3Trap is formed in second SCR catalyst by the first area of the SCR catalyst of region coating second On, second SCR catalyst also includes the second area for being configured as SCR catalyst operation, and wherein, described second SCR catalyst is included in vanadium oxide catalyst, Cu- zeolite catalysts, Fe- zeolite catalysts and mixed oxide catalyst extremely Few one kind.
14. exhausted gas post-processing system as claimed in claim 1, wherein, the SCR catalyst is the first SCR catalyst, and Wherein, the SO3Trap coats the second SCR catalyst by layer and formed in second SCR catalyst so that described the Two SCR catalysts include first layer, and the first layer includes at least one of following SCR catalyst：Vanadium oxide is urged Agent, Cu- zeolite catalysts, Fe- zeolite catalysts and mixed oxide catalyst, second SCR catalyst also include applying The second layer of the first layer is covered, the second layer includes the SO3Trap.
15. exhausted gas post-processing system as claimed in claim 1, wherein, the SO3Trap is configured to optionally trap SO3 Without trapping SO2、NOXAnd particulate matter.
CN201490001537.3U 2014-08-20 2014-08-20 Exhausted gas post-processing system Expired - Lifetime CN207161179U (en)

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US11242785B2 (en) 2020-06-30 2022-02-08 Saudi Arabian Oil Company Process to capture SOx onboard vehicles and ships
TW202342155A (en) 2022-04-01 2023-11-01 丹麥商托普索公司 A process for catalytic filtration of sulfur-containing gases using selective catalytic reduction

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US7213395B2 (en) * 2004-07-14 2007-05-08 Eaton Corporation Hybrid catalyst system for exhaust emissions reduction
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US8062601B2 (en) * 2010-10-26 2011-11-22 Ford Global Technologies, Llc Emission SCR NOX aftertreatment system having reduced SO3 generation and improved durability
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