CN109420430A - Catalyst filter core - Google Patents

Catalyst filter core Download PDF

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Publication number
CN109420430A
CN109420430A CN201710785419.6A CN201710785419A CN109420430A CN 109420430 A CN109420430 A CN 109420430A CN 201710785419 A CN201710785419 A CN 201710785419A CN 109420430 A CN109420430 A CN 109420430A
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CN
China
Prior art keywords
carrier
face
filter core
catalyst layer
outlet
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.)
Withdrawn
Application number
CN201710785419.6A
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Chinese (zh)
Inventor
游素月
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Individual
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Individual
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Publication date
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Priority to CN201710785419.6A priority Critical patent/CN109420430A/en
Publication of CN109420430A publication Critical patent/CN109420430A/en
Withdrawn legal-status Critical Current

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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D53/00—Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols
    • B01D53/34—Chemical or biological purification of waste gases
    • B01D53/74—General processes for purification of waste gases; Apparatus or devices specially adapted therefor
    • B01D53/86—Catalytic processes
    • B01D53/8643—Removing mixtures of carbon monoxide or hydrocarbons and nitrogen oxides
    • B01D53/8656—Successive elimination of the components
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D53/00—Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols
    • B01D53/34—Chemical or biological purification of waste gases
    • B01D53/74—General processes for purification of waste gases; Apparatus or devices specially adapted therefor
    • B01D53/86—Catalytic processes
    • B01D53/88—Handling or mounting catalysts
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D2251/00—Reactants
    • B01D2251/10—Oxidants
    • B01D2251/102—Oxygen
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D2251/00—Reactants
    • B01D2251/20—Reductants
    • B01D2251/206—Ammonium compounds
    • B01D2251/2062—Ammonia
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D2255/00—Catalysts
    • B01D2255/40—Mixed oxides
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D2256/00—Main component in the product gas stream after treatment
    • B01D2256/10—Nitrogen
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D2256/00—Main component in the product gas stream after treatment
    • B01D2256/22—Carbon dioxide
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D2257/00—Components to be removed
    • B01D2257/70—Organic compounds not provided for in groups B01D2257/00 - B01D2257/602
    • B01D2257/702—Hydrocarbons
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D2258/00—Sources of waste gases
    • B01D2258/02—Other waste gases
    • B01D2258/0283—Flue gases

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  • Engineering & Computer Science (AREA)
  • Environmental & Geological Engineering (AREA)
  • Chemical & Material Sciences (AREA)
  • Health & Medical Sciences (AREA)
  • Biomedical Technology (AREA)
  • Analytical Chemistry (AREA)
  • General Chemical & Material Sciences (AREA)
  • Oil, Petroleum & Natural Gas (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Exhaust Gas Treatment By Means Of Catalyst (AREA)

Abstract

The present invention relates to a kind of filter cores, form several inlet channels and several outlet passageways in carrier.The carrier has first end face and second end face to be distributed several holes at position of the carrier between the first, second end face.These outlet passageways separate whole inlet channels, so that inlet, outlet channel can only communicate with each other via hole.Each oxidation catalyst layer attachment carrier surrounds the wall surface of inlet channel, and each reducing catalyst layer attachment carrier surrounds the wall surface of outlet passageway.When filter core configure in exhaust emission system, make the inlet face of inlet channel to waste gas flow direction.The oxidation catalyst layer generates oxidation reaction to exhaust gas, and gas is reduced catalyst layer filter core and is reduced to innocuous gas after oxidation, the opposite quality for promoting environmental protection.

Description

Catalyst filter core
Technical field
The present invention relates to the field of purification of exhaust gas, particularly relate to a kind of catalyst filter core.
Background technique
Exhaust gas is the product after burning, is common in the boiler of vapour (machine) vehicle or power plant, factory, becomes the misfortune source of pollution air One of.Fine particle containing compounds such as a large amount of carbon, sulphur in exhaust gas, and the ignition temperature the high more is also easy to produce, it is right Air quality causes serious pollution.
Summary of the invention
It is constructed the purpose of the present invention is to provide a kind of using redox, so that filter core is purified most of in exhaust gas Harmful substance, the catalyst filter core of the opposite quality for promoting environmental protection.
In order to achieve the above objectives, filter core of the invention includes:
Carrier has first end face, second end face and several holes, these holes are in carrier between first end face and second Position between end face；
Several inlet channels, these inlet channels are axially formed in carrier, and each inlet channel has entrance and closing Portion, first end face of the entrance by carrier, second end face of the closure adjacent to carrier；
Several outlet passageways, these outlet passageways are axially formed in carrier and separate whole inlet channels, each Outlet passageway has outlet and closure, which is led to by the second end face of carrier, the closure adjacent to the first end face of carrier It crosses hole and uses gas channel and inlet channel intercommunication；
Multiple oxidation catalyst layers, each oxidation catalyst layer attachment carrier surround the wall surface of inlet channel, do not block hole but； And
Multiple reducing catalyst layers, each reducing catalyst layer attachment carrier surround the wall surface of outlet passageway, do not block hole but.
When filter core configure in exhaust emission system, allow the inlet face of inlet channel to waste gas flow direction, the oxidation catalyst layer Oxidation reaction is generated to exhaust gas, which restores again effect.
In this way, catalyst filter core of the invention, purifies most of nuisance in exhaust gas with oxidation, two catalyst layers of reduction Matter, the opposite quality for promoting environmental protection.
Detailed description of the invention
For the core that technology is illustrated, hereby cooperate necessary schema, detailed description of the present invention construction, method or process are such as Under.
Fig. 1 is the perspective view of one preferred embodiment of filter core of the present invention.
Fig. 2 is schematic diagram of Fig. 1 filter core configuration in exhaust emission system.
Fig. 3 is the enlarged drawing of filter core part.
Appended drawing reference
10 carrier 11 of filter core
Hole 11a first end face 12
13 runner 14 of second end face
15 entrance 15a of inlet channel
Closure 15b, 16b outlet passageway 16
Export 16a
20 reducing catalyst layer 22 of oxidation catalyst layer
30 waste gas flow direction 32 of exhaust emission system
Net airflow is to 34
Specific embodiment
As shown in Figure 1, the filter core 10 has carrier 11, several runners 14 are formed inside the carrier 11, and surround in carrier 11 The wall surface of runner 14 arranges multiple oxidation catalyst layers and multiple reducing catalyst layers.
In the present embodiment, which is cylindrical body, possesses first end face 12 and second end face 13.The carrier 11 is to use violet The ceramic articles of green stone (Cordierite) production, therefore position of the carrier 11 between first end face 12 and second end face 13, Mostly it is distributed several hole 11a (see Fig. 3).
In some embodiments, which can be gengon, for example cuboid.
In Fig. 2,3, the runner 14 distinguishes two groups: one group of inlet channel 15 and one group of outlet passageway according to flow direction 16.Wherein, these inlet channels 15 extend certain depth along the axis direction of carrier 11, and 15 2 end of inlet channel is defined For entrance 15a and closure 15b.Entrance 15a passes through the first end face 12 of carrier 11, and closure 15b is adjacent to carrier 11 Second end face 13.
These outlet passageways 16 are also to extend certain depth along the axis direction of carrier 11, and by whole inlet channels 15 separate.Although each outlet passageway 16 has outlet 16a and closure 16b, orientation is totally different from inlet channel 15.It changes Sentence is talked about, and outlet 16a passes through the second end face 13 of carrier 11, and closure 16b is adjacent to the first end face 12 of carrier 11.Cause This, which can only communicate with each other with inlet channel 15 through hole 11a.
In addition, the oxidation catalyst layer 20 attachment carrier 11 surrounds the wall surface of inlet channel 15, hole 11a is not blocked but.Institute The reducing catalyst layer 22 stated adheres to the wall surface that carrier 11 surrounds outlet passageway 16, does not block hole 11a equally.
In figure, which is configured in exhaust emission system 30, such as exhaust pipe.In this way, the entrance of the inlet channel 15 15a faces waste gas flow direction 32, as outlet passageway 16 outlet 16a then against net airflow to 34.It puts it bluntly, exhaust gas is by filter core 10 It is filtered into clean gas outflow.
For example, 20 pairs of exhaust gas of the oxidation catalyst layer at least generate following oxidation reaction:
CXHY+O2→CO2+H2O
Moreover, carbon dioxide (CO2) and water (H2O) smaller to the harm of human body.
In addition to this, the reducing catalyst layer 22 is with titanium dioxide (TiO2) be monomer, vanadium, tungsten, molybdenum metal oxide be Active matter, for example: vanadic anhydride (V2O5), tungstic acid (WO3) and molybdenum trioxide (MoO3) etc..
By taking vanadium system as an example, under the catalytic action of out of stock (abbreviation SCR) method of selective media reductive, restored with NO Effect generates harmless N2And H2O.Vanadium system active matter this moment is in reducing condition, then with the oxygen of air generate oxidation and Activity is kept, it can constantly and NOXAnd NH3Effect.In SCR reduction, it may occur however that reaction it is as follows:
4NO+4NH3+O2→4N2+6H2O
4NO+4NH3+3O2→4N2O+6H2O
2NO2+4NH3+O2→3N2+6H2O
NO+NO2+2NH3→2N2+3H2O
Above narration and explanation is only the explanation of presently preferred embodiments of the present invention, and those skilled in the art are worked as can Make other modifications according to the above claim and above-mentioned explanation, only these modifications should be for creation of the invention Spirit and in interest field of the invention.

Claims (6)

1. a kind of catalyst filter core, comprising:
Carrier has first end face, second end face and several holes, these holes are in carrier between first end face and second end face Between position；
Several inlet channels, these inlet channels are axially formed in carrier, and each inlet channel has entrance and closure, institute First end face of the entrance stated by carrier, second end face of the closure adjacent to carrier；
Several outlet passageways, these outlet passageways are axially formed in carrier and separate whole inlet channels, each outlet There are outlet and closure, second end face of the outlet by carrier, first end of the closure adjacent to carrier in channel Gas channel and inlet channel intercommunication are used by hole in face；
Multiple oxidation catalyst layers, each oxidation catalyst layer attachment carrier surround the wall surface of inlet channel, do not block hole but；And
Multiple reducing catalyst layers, each reducing catalyst layer attachment carrier surround the wall surface of outlet passageway, do not block hole but.
2. catalyst filter core as described in claim 1, which is characterized in that the filter core configures in exhaust emission system, Allow the inlet face of inlet channel to waste gas flow direction.
3. catalyst filter core as claimed in claim 1 or 2, which is characterized in that the oxidation catalyst layer at least produces exhaust gas Give birth to the oxidation reaction of column:
CXHY+O2→CO2+H2O。
4. catalyst filter core as claimed in claim 3, which is characterized in that the reducing catalyst layer is in selective media reductive Under the catalytic action of out of stock method, reduction is carried out with NO and generates N2And H2O。
5. catalyst filter core as claimed in claim 4, which is characterized in that go back original work in the out of stock method of selective media reductive In, generable reaction is as follows:
4NO+4NH3+O2→4N2+6H2O
4NO+4NH3+3O2→4N2O+6H2O
2NO2+4NH3+O2→3N2+6H2O
NO+NO2+2NH3→2N2+3H2O。
6. catalyst filter core as claimed in claim 4, which is characterized in that the reducing catalyst layer is single with titanium dioxide Body, vanadium, tungsten, molybdenum metal oxide be active matter.
CN201710785419.6A 2017-09-04 2017-09-04 Catalyst filter core Withdrawn CN109420430A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN201710785419.6A CN109420430A (en) 2017-09-04 2017-09-04 Catalyst filter core

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN201710785419.6A CN109420430A (en) 2017-09-04 2017-09-04 Catalyst filter core

Publications (1)

Publication Number Publication Date
CN109420430A true CN109420430A (en) 2019-03-05

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CN201710785419.6A Withdrawn CN109420430A (en) 2017-09-04 2017-09-04 Catalyst filter core

Country Status (1)

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CN (1) CN109420430A (en)

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20040037754A1 (en) * 2002-08-23 2004-02-26 Barry Van Setten Apparatus for the removal of soot particles from the exhaust gas of diesel engines
CN1863586A (en) * 2003-08-05 2006-11-15 乌米科雷股份两合公司 Catalyst arrangement and method of purifying the exhaust gas of internal combustion engines operated under lean conditions
CN102575544A (en) * 2009-10-13 2012-07-11 优迪卡汽车株式会社 Exhaust purification device for engine
CN102711960A (en) * 2009-11-20 2012-10-03 巴斯夫欧洲公司 Zoned catalyzed soot filter
CN107035468A (en) * 2015-12-14 2017-08-11 现代自动车株式会社 Catalysed particulate filter

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20040037754A1 (en) * 2002-08-23 2004-02-26 Barry Van Setten Apparatus for the removal of soot particles from the exhaust gas of diesel engines
CN1863586A (en) * 2003-08-05 2006-11-15 乌米科雷股份两合公司 Catalyst arrangement and method of purifying the exhaust gas of internal combustion engines operated under lean conditions
CN102575544A (en) * 2009-10-13 2012-07-11 优迪卡汽车株式会社 Exhaust purification device for engine
CN102711960A (en) * 2009-11-20 2012-10-03 巴斯夫欧洲公司 Zoned catalyzed soot filter
CN107035468A (en) * 2015-12-14 2017-08-11 现代自动车株式会社 Catalysed particulate filter

Non-Patent Citations (2)

* Cited by examiner, † Cited by third party
Title
夏怀祥: "《选择性催化还原法（SCR）烟气脱硝》", 30 September 2012, 中国电力出版社 *
车心如: "《界面与胶体化学》", 31 August 2012, 中国铁道出版社 *

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Application publication date: 20190305

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