CN105756754A - Tail gas filter - Google Patents

Tail gas filter Download PDF

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Publication number
CN105756754A
CN105756754A CN201610190245.4A CN201610190245A CN105756754A CN 105756754 A CN105756754 A CN 105756754A CN 201610190245 A CN201610190245 A CN 201610190245A CN 105756754 A CN105756754 A CN 105756754A
Authority
CN
China
Prior art keywords
ceramic
carrier
honeycomb carrier
drainage screen
percetage
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Withdrawn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
CN201610190245.4A
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Chinese (zh)
Inventor
王亚莉
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Individual
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Individual
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Filing date
Publication date
Application filed by Individual filed Critical Individual
Priority to CN201610190245.4A priority Critical patent/CN105756754A/en
Publication of CN105756754A publication Critical patent/CN105756754A/en
Withdrawn legal-status Critical Current

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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
    • F01N3/02—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for cooling, or for removing solid constituents of, exhaust
    • F01N3/021—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for cooling, or for removing solid constituents of, exhaust by means of filters
    • F01N3/033—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for cooling, or for removing solid constituents of, exhaust by means of filters in combination with other devices
    • F01N3/035—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for cooling, or for removing solid constituents of, exhaust by means of filters in combination with other devices with catalytic reactors, e.g. catalysed diesel particulate 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
    • 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
    • F01N3/0814—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for rendering innocuous by using absorbents or adsorbents combined with catalytic converters, e.g. NOx absorption/storage reduction catalysts
    • 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
    • F01N3/0821—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for rendering innocuous by using absorbents or adsorbents combined with particulate 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
    • F01N2330/00—Structure of catalyst support or particle filter
    • F01N2330/02—Metallic plates or honeycombs, e.g. superposed or rolled-up corrugated or otherwise deformed sheet metal
    • F01N2330/04—Methods of manufacturing

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  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Combustion & Propulsion (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Exhaust Gas Treatment By Means Of Catalyst (AREA)
  • Catalysts (AREA)

Abstract

The invention relates to a tail gas filter. The tail gas filter comprises a filter box, and a first filter screen, a first ceramic honeycomb carrier, a second ceramic honeycomb carrier and a second filter screen are arranged in the filter box. A honeycomb carrier coating process includes: step 1, material preparation; step 2, coating; step 3, calcining. By the tail gas filter and the honeycomb carrier coating process, tail gas is reacted to generate CO2 and H2O under quaternary filtering action of the first filter screen, the first ceramic honeycomb carrier, the second ceramic honeycomb carrier and the second filter screen, and black smoke particles in waste gas can be effectively filtered out by micropores of partitions and burnt under the action of catalyst coatings, so that tail gas purification effects are further improved; the coating process is uniform in coating, and coated slurry can be completely combined with the ceramic carriers to make the ceramic carriers effective in filtering.

Description

A kind of exhaust gas filter
Technical field
The present invention relates to a kind of exhaust gas filter, for purifying vehicle exhaust.Belong to automobile equipment technical field.
Background technology
At present, common car tail-gas filter, is all much be expelled directly out through simply filtration, and is equipped with the automobile of Diesel engine, and containing black smoke granule in its tail gas, existing exhaust gas filter can not effectively filter black smoke granule, so can cause environmental pollution.Existing honeycomb substrate coating processes is, at ceramic monolith bottom up injection coating slurry, this kind of technique has the disadvantage that: slurry is watery, not only coating difficulty is big, and be coated with slurry and fully can not be combined with carrier, the ceramic monolith after coating unsightly, and poor filtration effect.
Summary of the invention
It is an object of the invention to overcome above-mentioned deficiency; provide a kind of exhaust gas filter; also can effectively filter black smoke granule while this exhaust gas filter CO, HC, NOx harmful gas in filtering vehicle exhaust, and at high temperature black smoke granule can progressively burn and aoxidize；Coating processes is not only coated with uniformly, and the slurry being coated with can fully be combined with ceramic monolith so that the good filtration effect of ceramic monolith.
The object of the present invention is achieved like this:
nullA kind of exhaust gas filter，Including Rose Box，It is characterized in: described Rose Box is cylindrical，It is disposed with the first drainage screen along airflow direction in Rose Box、First ceramic honeycomb carrier、Second ceramic honeycomb carrier and the second drainage screen，First drainage screen is provided with oblique backfin and longitudinal belling，Described first ceramic honeycomb carrier and the second ceramic honeycomb carrier structure are identical，And shape is corresponding with Rose Box，First ceramic honeycomb carrier is densely covered with pore in the axial direction，One end of described pore is opening，The other end is provided with closure face，Described closure face and open space are arranged，Described adjacent two pores are provided with next door，Next door has in cellular micropore，Next door is coated with catalyst coat，The hole count of its pore is 700 holes/square inch，The thickness in its next door is 0.15 ~ 0.17mm，Its first drainage screen adopts stainless steel material to make，Second drainage screen adopts absorbent charcoal material to make.
Further, described first ceramic honeycomb carrier, the second ceramic honeycomb carrier preparation method comprise the following steps:
Step 1, dispensing, first activated alumina and platinum, rhodium, palladium precious metal solution are mixed 12 hours, obtain the mixed solution of percetage by weight 30-70%, then the rare earth of percetage by weight 25-60% is allocated into, add the active component (molecular sieve) of percetage by weight 1-5%, the high-molecular resin solution of percetage by weight 1-5%, percetage by weight 1-5% aluminium glue, percetage by weight 1-5% rare earth nitrate, stir 6 hours agglutination mixed liquor slurries；Its middle rare earth is chloride oxygen scavenging material；Active component is the molecular sieve of high porosity；High-molecular resin solution is poly-vinyl alcohol solution, and its water is 1:20 with material ratio；
Step 2, coating, honeycomb ceramic carrier is placed in the top of a suction device, the bottom of suction device and honeycomb ceramic carrier is close to, the slurry obtained of step 1 is poured on the end face of honeycomb ceramic carrier, slurry jelly does not possess mobility, is positioned at the surface of honeycomb ceramic carrier, now opens suction device, under the effect of suction device, gluey slurry is attracted to bottom surface along the next door of honeycomb ceramic carrier from end face；
Step 3, firing, honeycomb ceramic carrier step 2 obtained is placed in the stove of 650 DEG C and has both fired 4-5 hour.
Further, described catalyst coat is mainly composed of Pt, Pd, Rh, Al2O3, Ce, La, Zr, Cu and Mn
Compared with prior art, the invention has the beneficial effects as follows:
One exhaust gas filter of the present invention, under the first drainage screen, the first ceramic honeycomb carrier, the second ceramic honeycomb carrier and the second drainage screen level Four filter, will be mainly composed of the tail gas of CO, HC, NOx, react into CO2、H2O、N2And O2, the micropore on next door can effectively filter the black smoke granule in waste gas simultaneously, and under the effect of catalyst coat, black smoke granule can be burned off, and further increases tail gas clean-up effect；Dispensing adds the poly-vinyl alcohol solution as binding agent and the aluminium glue as adsorbent, therefore the mixed liquor after stirring is jelly, and the suction device in matching step three, can so that slurry starts coating from the end face of ceramic monolith, with existing from compared with starting to be coated with the technique of watery slurry bottom ceramic monolith, uniformly, the slurry of coating can fully be combined with ceramic monolith so that the good filtration effect of ceramic monolith in slurry of the present invention coating.
Accompanying drawing explanation
Fig. 1 is the structural representation of exhaust gas filter of the present invention.
Fig. 2 is the left view of Fig. 1.
Fig. 3 is the schematic cross-section of first ceramic honeycomb carrier of the present invention.
Fig. 4 is the partial axial section figure of first ceramic honeycomb carrier of the present invention.
Fig. 5 is the structural representation in the next door of first ceramic honeycomb carrier of the present invention.
Fig. 6 is the structural representation of first drainage screen of the present invention.
Fig. 7 is the expanded view of first drainage screen of the present invention.
Fig. 8 is the enlarged drawing of A in Fig. 6.
In figure:
Rose Box 1,
First drainage screen 2,
Backfin 2.1,
Belling 2.2,
First ceramic honeycomb carrier 3,
Pore 3.1,
Closure face 3.2,
Next door 3.3,
Micropore 3.4,
Catalyst coat 3.5
Opening 3.6,
Inlet exhaust gas 4,
Offgas outlet 5,
Tail gas 6,
Second ceramic honeycomb carrier 7,
Second drainage screen 8,
Gas channel 9.
Detailed description of the invention
Referring to Fig. 1-8, the present invention relates to a kind of exhaust gas filter, it includes Rose Box the 1, first drainage screen the 2, first ceramic honeycomb carrier the 3, second ceramic honeycomb carrier 7 and the second drainage screen 8, the left end of Rose Box 1 is inlet exhaust gas 4, right-hand member is offgas outlet 5, described first drainage screen the 2, first ceramic honeycomb carrier the 3, second ceramic honeycomb carrier 7 and the second drainage screen 8 are arranged in Rose Box 1, and the first drainage screen 2 is near inlet exhaust gas 4 place, and the second drainage screen 8 is near offgas outlet 5 place.Described Rose Box 1 is cylindrical, described first ceramic honeycomb carrier 3 is identical with the structure of the second honeycomb substrate 7, and shape is corresponding with crossing filtering case 1, first ceramic honeycomb carrier 3 is densely covered with pore 3.1 in the axial direction, one end of described pore 3.1 is opening 3.6, the other end is provided with closure face 3.2, described closure face 3.2 and opening 3.6 interval are arranged, described adjacent two pores 3.1 are provided with next door 3.3, next door 3.3 has in cellular micropore 3.4, next door 3.3 is coated with catalyst coat 3.5.Wherein, the hole count of pore 3.1 is 700 holes/square inch, and the thickness in next door 3.3 is 0.15 ~ 0.17mm.nullDescribed first drainage screen 2 adopts stainless steel material to make，First drainage screen 2 is provided with oblique backfin 2.1 and longitudinal belling 2.2，Fig. 7 is the expanded view of the first drainage screen 2，Way is laterally axial when rolling of the first drainage screen 2，It it is longitudinally first drainage screen 2 radial direction when rolling，During use，It is arranged in Rose Box 1 after first drainage screen 2 is wound，Backfin 2.1 and the first drainage screen 2 body form gas channel 9，Gas channel 9 intersection forms multiple rhombus expansion groove，And formed a partition every a segment distance by belling 2.2，When motor exhaust blows to gas channel 9，A part taps along gas channel 9，A part is through the first drainage screen 2 bulk filter，Partial tail gas along gas channel 9 shunting can produce turbulent flow in various degree when through expansion groove and partition，Form the shunting of multiple directions，The black smoke granule in tail gas is enable fully to be captured on the first drainage screen 2 body，When black smoke granule capturing is to time a certain amount of，Can be burnt formation CO under the high temperature of engine exhaust2, adopt absorbent charcoal material to make thus realizing the second drainage screen 8 described in the function of filter regeneration.The first drainage screen 2 and the second untreated CO (carbon monoxide converter) gas of ceramic honeycomb carrier 7 can being adsorbed for the drainage screen with activated carbon of second drainage screen 8.
The preparation method of described first ceramic honeycomb carrier the 3, second ceramic honeycomb carrier 7 comprises the following steps:
Step 1, dispensing, first activated alumina and platinum, rhodium, palladium precious metal solution are mixed 12 hours, obtain the mixed solution of percetage by weight 30-70%, then the rare earth of percetage by weight 25-60% is allocated into, add the active component (molecular sieve) of percetage by weight 1-5%, the high-molecular resin solution of percetage by weight 1-5%, percetage by weight 1-5% aluminium glue, percetage by weight 1-5% rare earth nitrate, stir 6 hours agglutination mixed liquor slurries；Its middle rare earth is chloride oxygen scavenging material；Active component is the molecular sieve of high porosity；High-molecular resin solution is poly-vinyl alcohol solution, and its water is 1:20 with material ratio.
Step 2, coating, honeycomb ceramic carrier is placed in the top of a suction device, the bottom of suction device and honeycomb ceramic carrier is close to, the slurry obtained of step 1 is poured on the end face of honeycomb ceramic carrier, slurry jelly does not possess mobility, is positioned at the surface of honeycomb ceramic carrier, now opens suction device, under the effect of suction device, gluey slurry is attracted to bottom surface along the next door of honeycomb ceramic carrier from end face.
Step 3, firing, honeycomb ceramic carrier step 2 obtained is placed in the stove of 650 DEG C and fires 4-5 hour.
In step 1, add the poly-vinyl alcohol solution as binding agent and the aluminium glue as adsorbent, therefore the mixed liquor after stirring is jelly, and the suction device in matching step 2, can so that slurry start coating from the end face of ceramic monolith, with existing from compared with starting to be coated with the technique of watery slurry bottom ceramic monolith, slurry of the present invention coating is uniformly, the slurry of coating can fully be combined with ceramic monolith so that the good filtration effect of ceramic monolith.
nullOperation principle: the present invention adopts cordierite to be fabricated to honeycomb ceramic carrier，And be built in exhaust purifier of diesel engine，The waste gas inlet exhaust gas 4 with black smoke granule that Diesel engine is discharged enters，Single filter through the first drainage screen 2，Cascade filtration is carried out subsequently into the first ceramic honeycomb carrier 3，Enter from the opening 3.6 of pore 3.1，Owing to pore 3.1 is at one end opening 3.6，It is then closure face 3.2 at the other end，Therefore waste gas can pass through the next door 3.3 with micropore 3.4，Then discharge from the opening 3.6 of adjacent air holes 3.1，Owing to the diameter relatively micropore 3.4 of black smoke granule is big，Therefore the black smoke granule in waste gas is by filtered seizure next door 3.3，Air-flow then passes from micropore 3.4，The waste gas discharged from the first ceramic honeycomb carrier 3 enters the second ceramic honeycomb carrier 7，Carry out three-stage filtration，The same cascade filtration of work principle of filter，Enter the second drainage screen 8 from the waste gas of the second ceramic honeycomb carrier 7 discharge and carry out level Four filtration，The carbon monoxide of residual is adsorbed.The described catalyst coat 3.5 active rare earth containing noble metal, Main Ingredients and Appearance has Pt, Pd, Rh, Al2O3, Ce, La, Zr, Cu, Mn, when the waste gas (being mainly the harmful gass such as CO, HC, NOx) of diesel combustion is through micropore 3.4, is coated in the catalyst coat 3.5 on next door 3.3 and will strengthen CO, HC, NOxThe activity of three kinds of gases, promotes it to carry out certain oxidation-reduction chemical reaction, and wherein CO is at high temperature oxidized to colourless nontoxic carbon dioxide, and HC compound at high temperature resolves into water (H2And carbon dioxide, NO O)xIt is reduced into nitrogen and oxygen.When diesel exhaust gas temperature reaches 375 degrees Celsius; under the effect of catalyst coat 3.5; black smoke granule on next door 3.3 can progressively burn and aoxidize; the purifying rate of black smoke granule about reaches more than 85%; when reaction temperature reaches 500 degrees Celsius, catalyst and black smoke particle reaction are thus burning (catalysis burning) completely, and now the purifying rate of black smoke granule is up to more than 90%.

Claims (4)

  1. null1. an exhaust gas filter，Including Rose Box (1)，It is characterized in that: described Rose Box (1) is cylindrical，It is disposed with the first drainage screen (2) along airflow direction in Rose Box (1)、First ceramic honeycomb carrier (3)、Second ceramic honeycomb carrier (7) and the second drainage screen (8)，Described first drainage screen (2) adopts stainless steel material to make，Described second drainage screen (8) adopts absorbent charcoal material to make，First drainage screen (2) is provided with oblique backfin (2.1) and longitudinal belling (2.2)，Described first ceramic honeycomb carrier (3) is identical with the second ceramic honeycomb carrier (7) structure，And shape is corresponding with Rose Box (1)，First ceramic honeycomb carrier (3) is densely covered with pore (3.1) in the axial direction，The hole count of described pore (3.1) is 700 holes/square inch，One end of described pore (3.1) is opening (3.6)，The other end is provided with closure face (3.2)，Described closure face (3.2) and opening (3.6) interval are arranged，Described adjacent two pores (3.1) are provided with next door (3.3)，The thickness in described next door (3.3) is 0.15 ~ 0.17mm，Next door (3.3) has in cellular micropore (3.4)，Next door (3.3) is coated with catalyst coat (3.5).
  2. 2. exhaust gas filter as claimed in claim 1 a kind of, it is characterised in that: described first ceramic honeycomb carrier (3), the second ceramic honeycomb carrier (7) preparation method comprise the following steps:
    Step 1, dispensing, first activated alumina and platinum, rhodium, palladium precious metal solution are mixed 12 hours, obtain the mixed solution of percetage by weight 30-70%, then the rare earth of percetage by weight 25-60% is allocated into, add the rare earth nitrate of the active component (molecular sieve) of percetage by weight 1-5%, the high-molecular resin solution of percetage by weight 1-5%, the aluminium glue of percetage by weight 1-5%, percetage by weight 1-5%, final water is 1:20 with other material ratio, stirs 6 hours agglutination mixed liquor slurries；
    Step 2, coating, honeycomb ceramic carrier is placed in the top of a suction device, the bottom of suction device and honeycomb ceramic carrier is close to, the slurry obtained of step 1 is poured on the end face of honeycomb ceramic carrier, slurry jelly does not possess mobility, is positioned at the surface of honeycomb ceramic carrier, now opens suction device, under the effect of suction device, gluey slurry is attracted to bottom surface along the next door of honeycomb ceramic carrier from end face；
    Step 3, firing, honeycomb ceramic carrier step 2 obtained is placed in the stove of 650 DEG C and has both fired 4-5 hour.
  3. 3. a kind of exhaust gas filter as claimed in claim 2, it is characterised in that: described rare earth is chloride oxygen scavenging material；Described active component is the molecular sieve of high porosity；Described high-molecular resin solution is poly-vinyl alcohol solution.
  4. 4. a kind of exhaust gas filter as described in as arbitrary in claim 1-3, it is characterised in that: described catalyst coat (3.5) is mainly composed of Pt, Pd, Rh, Al2O3, Ce, La, Zr, Cu and Mn.
CN201610190245.4A 2016-03-29 2016-03-29 Tail gas filter Withdrawn CN105756754A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN201610190245.4A CN105756754A (en) 2016-03-29 2016-03-29 Tail gas filter

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN201610190245.4A CN105756754A (en) 2016-03-29 2016-03-29 Tail gas filter

Publications (1)

Publication Number Publication Date
CN105756754A true CN105756754A (en) 2016-07-13

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Family Applications (1)

Application Number Title Priority Date Filing Date
CN201610190245.4A Withdrawn CN105756754A (en) 2016-03-29 2016-03-29 Tail gas filter

Country Status (1)

Country Link
CN (1) CN105756754A (en)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN107035484A (en) * 2017-06-22 2017-08-11 广西壮族自治区环境保护科学研究院 A kind of automobile exhaust gas purifying installation
CN110195637A (en) * 2019-05-14 2019-09-03 重庆鹏锦塑料有限公司 A kind of automobile exhaust gas purifying installation
CN114251158A (en) * 2020-09-24 2022-03-29 广东加南环保生物科技有限公司 Diesel exhaust particulate matter catalytic filter and method for manufacturing same

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN107035484A (en) * 2017-06-22 2017-08-11 广西壮族自治区环境保护科学研究院 A kind of automobile exhaust gas purifying installation
CN107035484B (en) * 2017-06-22 2023-04-25 广西壮族自治区环境保护科学研究院 Automobile exhaust purifying device
CN110195637A (en) * 2019-05-14 2019-09-03 重庆鹏锦塑料有限公司 A kind of automobile exhaust gas purifying installation
CN114251158A (en) * 2020-09-24 2022-03-29 广东加南环保生物科技有限公司 Diesel exhaust particulate matter catalytic filter and method for manufacturing same
CN114251158B (en) * 2020-09-24 2022-09-16 广东加南环保生物科技有限公司 Diesel exhaust particulate matter catalytic filter and method for manufacturing same

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Application publication date: 20160713