CN109012178A - A kind of diesel engine vent gas filtering purification method - Google Patents
A kind of diesel engine vent gas filtering purification method Download PDFInfo
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- CN109012178A CN109012178A CN201811075909.8A CN201811075909A CN109012178A CN 109012178 A CN109012178 A CN 109012178A CN 201811075909 A CN201811075909 A CN 201811075909A CN 109012178 A CN109012178 A CN 109012178A
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- tail gas
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- diesel
- purification method
- engine vent
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- 238000001914 filtration Methods 0.000 title claims abstract description 40
- 238000000034 method Methods 0.000 title claims abstract description 17
- 238000000746 purification Methods 0.000 title claims abstract description 17
- 239000003054 catalyst Substances 0.000 claims abstract description 54
- 230000003647 oxidation Effects 0.000 claims abstract description 41
- 238000007254 oxidation reaction Methods 0.000 claims abstract description 41
- 239000002184 metal Substances 0.000 claims abstract description 26
- 229910052751 metal Inorganic materials 0.000 claims abstract description 26
- 239000006229 carbon black Substances 0.000 claims abstract description 16
- 239000008188 pellet Substances 0.000 claims abstract description 14
- 150000001875 compounds Chemical class 0.000 claims abstract description 12
- 238000006555 catalytic reaction Methods 0.000 claims abstract description 10
- 239000010721 machine oil Substances 0.000 claims abstract description 8
- 239000004071 soot Substances 0.000 claims abstract description 4
- 239000002131 composite material Substances 0.000 claims description 6
- 239000002283 diesel fuel Substances 0.000 claims description 6
- 230000032683 aging Effects 0.000 claims description 5
- PNEYBMLMFCGWSK-UHFFFAOYSA-N aluminium oxide Inorganic materials [O-2].[O-2].[O-2].[Al+3].[Al+3] PNEYBMLMFCGWSK-UHFFFAOYSA-N 0.000 claims description 5
- 229910052593 corundum Inorganic materials 0.000 claims description 5
- 229910001845 yogo sapphire Inorganic materials 0.000 claims description 5
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims 1
- 230000000694 effects Effects 0.000 abstract description 16
- 230000009466 transformation Effects 0.000 abstract description 5
- 238000005516 engineering process Methods 0.000 abstract description 4
- 230000003197 catalytic effect Effects 0.000 description 5
- 239000003921 oil Substances 0.000 description 4
- 238000006243 chemical reaction Methods 0.000 description 3
- 239000003795 chemical substances by application Substances 0.000 description 3
- 230000004048 modification Effects 0.000 description 3
- 238000012986 modification Methods 0.000 description 3
- 230000015572 biosynthetic process Effects 0.000 description 2
- 238000002485 combustion reaction Methods 0.000 description 2
- PCHJSUWPFVWCPO-UHFFFAOYSA-N gold Chemical compound [Au] PCHJSUWPFVWCPO-UHFFFAOYSA-N 0.000 description 2
- 239000010931 gold Substances 0.000 description 2
- 229910052737 gold Inorganic materials 0.000 description 2
- 239000008187 granular material Substances 0.000 description 2
- 230000008929 regeneration Effects 0.000 description 2
- 238000011069 regeneration method Methods 0.000 description 2
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 1
- 238000005299 abrasion Methods 0.000 description 1
- 238000010521 absorption reaction Methods 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 229910052799 carbon Inorganic materials 0.000 description 1
- 230000008859 change Effects 0.000 description 1
- 238000004140 cleaning Methods 0.000 description 1
- 239000000295 fuel oil Substances 0.000 description 1
- 230000001976 improved effect Effects 0.000 description 1
- 230000006872 improvement Effects 0.000 description 1
- 239000004615 ingredient Substances 0.000 description 1
- 239000010687 lubricating oil Substances 0.000 description 1
- 238000012423 maintenance Methods 0.000 description 1
- 239000002245 particle Substances 0.000 description 1
- 238000007789 sealing Methods 0.000 description 1
- 239000000779 smoke Substances 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
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
- B01D53/92—Chemical or biological purification of waste gases of engine exhaust gases
- B01D53/94—Chemical or biological purification of waste gases of engine exhaust gases by catalytic processes
- B01D53/944—Simultaneously removing carbon monoxide, hydrocarbons or carbon making use of oxidation catalysts
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D46/00—Filters or filtering processes specially modified for separating dispersed particles from gases or vapours
-
- 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
- B01D53/92—Chemical or biological purification of waste gases of engine exhaust gases
- B01D53/94—Chemical or biological purification of waste gases of engine exhaust gases by catalytic processes
- B01D53/9404—Removing only nitrogen compounds
- B01D53/9409—Nitrogen oxides
- B01D53/9413—Processes characterised by a specific catalyst
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D2255/00—Catalysts
- B01D2255/10—Noble metals or compounds thereof
- B01D2255/102—Platinum group metals
- B01D2255/1021—Platinum
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D2255/00—Catalysts
- B01D2255/20—Metals or compounds thereof
- B01D2255/204—Alkaline earth metals
- B01D2255/2045—Calcium
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D2255/00—Catalysts
- B01D2255/20—Metals or compounds thereof
- B01D2255/207—Transition metals
- B01D2255/20707—Titanium
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D2255/00—Catalysts
- B01D2255/20—Metals or compounds thereof
- B01D2255/209—Other metals
- B01D2255/2092—Aluminium
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D2258/00—Sources of waste gases
- B01D2258/01—Engine exhaust gases
- B01D2258/012—Diesel engines and lean burn gasoline engines
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02A—TECHNOLOGIES FOR ADAPTATION TO CLIMATE CHANGE
- Y02A50/00—TECHNOLOGIES FOR ADAPTATION TO CLIMATE CHANGE in human health protection, e.g. against extreme weather
- Y02A50/20—Air quality improvement or preservation, e.g. vehicle emission control or emission reduction by using catalytic converters
Landscapes
- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Health & Medical Sciences (AREA)
- Biomedical Technology (AREA)
- Environmental & Geological Engineering (AREA)
- Analytical Chemistry (AREA)
- General Chemical & Material Sciences (AREA)
- Oil, Petroleum & Natural Gas (AREA)
- Combustion & Propulsion (AREA)
- Exhaust Gas Treatment By Means Of Catalyst (AREA)
- Catalysts (AREA)
- Exhaust Gas After Treatment (AREA)
Abstract
The present invention announces a kind of diesel engine vent gas filtering purification method, belongs to diesel engine vent gas processing technology field, using steps of processing: firstly, collecting the tail gas of diesel engine discharge；Then, the tail gas being collected into is transported in metal filtering core by inlet cylinder, for being filtered to the machine oil in tail gas with the greasy filth that soot particulate is mixed to form；Secondly, filtered tail gas is transported in diesel oxidation catalyst, for catalysis oxidations such as CO, HC compounds in tail gas；Then, tail gas is transported in diesel particulate trap, for capturing the carbon black pellet object in tail gas；Finally, filtered tail gas discharge up to standard.A kind of diesel engine vent gas filtering purification method of the present invention, the greasy filth in diesel engine vent gas can be adsorbed and be removed, so that relatively uniform for the oxidation of CO, HC compound, transformation efficiency is higher, tail gas clean-up effect with higher.
Description
Technical field
The present invention relates to diesel engine vent gas processing technology field, specially a kind of diesel engine vent gas filtering purification method.
Background technique
Contain a large amount of harmful substance in ingredient in the tail gas of diesel engine discharge, mainly there is NO, HC, CO and carbon black
Grain, if direct emission can cause biggish pollution to environment.Simultaneously because diesel engine maintenance is improper, air filter is replaced not in time
Core, or poor quality fuel oil formation carbon distribution is used for a long time, diesel engine piston and cylinder body abrasion is caused to lead to diesel engine burn oil or whirlpool
The reasons such as supercharger sealing ring damage lubricating oil leakage are taken turns, contain organic oil in the tail gas of diesel engine discharge, machine oil does not have combustible support not
It can burn, the exhaust particulate black smoke of machine oil and discharge mixes, and forms greasy filth.
In existing diesel engine vent gas processing technique, generally caught by diesel oxidation catalyst catalysis oxidation and diesel particulate
Storage captures the method cleaning of off-gas of the carbon black pellet in tail gas, but the greasy filth in tail gas enters in diesel oxidation catalyst,
Greasy filth is adhered on the hole wall of diesel oxidation catalyst, causes CO, HC compound in tail gas that cannot come into full contact with diesel oil oxidation
Catalytic coated layer on catalyst converter inner hole wall, so that oxidation is uneven, transformation efficiency is reduced；The greasy filth of formation enters diesel particulate
Trap granule capturing component can seriously block diesel particulate trap granule capturing component, be unable to high-temp combustion regeneration, because
This causes engine misses, cannot start.
Summary of the invention
The purpose of the present invention is to provide a kind of diesel engine vent gas filtering purification methods, solve at existing diesel engine vent gas
Cause lower to the purification efficiency of tail gas, clean-up effect is poor to ask since the greasy filth in tail gas can not be removed in reason technology
Topic.
In order to solve the above technical problems, the invention adopts the following technical scheme:
A kind of diesel engine vent gas filtering purification method, using steps of processing:
(1) exhaust collection: the tail gas of diesel engine discharge is collected；
(2) metal filtering core filters: the tail gas that step (1) is collected into being transported in metal filtering core, for the machine oil in tail gas
It is filtered with the greasy filth that soot particulate is mixed to form；
(3) diesel oxidation catalyst filter: step (2) filtered tail gas is transported in diesel oxidation catalyst, for pair
The catalysis oxidations such as CO, HC compound in tail gas；
(4) diesel particulate trap filters: step (3) filtered tail gas being transported in diesel particulate trap, for going
Except the carbon black pellet object in tail gas；
(5) exhaust emissions: will be by step (4) filtered tail gas discharge up to standard.
Preferably, in step (2), tail gas is entered in the metal filtering core by inlet cylinder, is set in the metal filtering core
It is equipped with wire, for the greasy filth in tail gas to be adsorbed on to the surface of wire.
Further technical solution is that, when the temperature in metal filtering core reaches 300 DEG C, wire is fired by burning red dot, gold
Belong to the greasy filth burning in the tail gas adsorbed in filter core.
Preferably, in step (3), the diesel oxidation catalyst inner surface is coated with oxidation catalyst, the catalyst
For with Al2O3For carrier, Pt content is 1.8-2.4g/dm3Four-way catalysts.
Further technical solution is that the catalyst is in SO2Under the atmosphere of vapor, at a temperature of 550-620 DEG C
Aging 12-15h.
Preferably, in step (4), catalyst is provided in the diesel particulate trap, the catalyst is perovskite
Type composite oxide catalysts.
Compared with prior art, beneficial effects of the present invention are at least one of following:
The present invention is provided with metal filtering core, can by diesel engine vent gas machine oil and the greasy filth that is mixed to form of carbon black pellet adsorb
And remove, increase the contact area between the catalyst coat in tail gas and subsequent diesel oxidation catalyst, so that for
The oxidation of CO, HC compound is relatively uniform, and transformation efficiency is higher, tail gas clean-up effect with higher.
Oxidation catalyst coat is provided in diesel oxidation catalyst of the present invention, activity with higher enables to
The conversion ratio of CO, HC reach 90%, also can reach 40% to the purifying rate of carbon black pellet, have preferable clean-up effect to tail gas.
It is provided with perovskite type composite oxide catalyst in diesel particulate trap of the present invention, for the carbon black in tail gas
The catalytic activity of particle burning is higher, while NOx is reduced to N2Also there is preferable effect, the purification to tail gas can be improved
Effect.
Specific embodiment
In order to make the objectives, technical solutions, and advantages of the present invention clearer, with reference to embodiments, to the present invention
It is further elaborated.It should be appreciated that the specific embodiments described herein are merely illustrative of the present invention, it is not used to
Limit the present invention.
Embodiment 1
A kind of diesel engine vent gas filtering purification method, using steps of processing:
(1) exhaust collection: the tail gas of diesel engine discharge is collected；
(2) metal filtering core filters: the tail gas that step (1) is collected into being transported in metal filtering core, for the machine oil in tail gas
It is filtered with the greasy filth that soot particulate is mixed to form；
(3) diesel oxidation catalyst filter: step (2) filtered tail gas is transported in diesel oxidation catalyst, for pair
The catalysis oxidations such as CO, HC compound in tail gas；
(4) diesel particulate trap filters: step (3) filtered tail gas being transported in diesel particulate trap, for going
Except the carbon black pellet object in tail gas；
(5) exhaust emissions: will be by step (4) filtered tail gas discharge up to standard.
The tail gas of diesel emission passes through inlet cylinder first and enters in metal filtering core, and metal filtering core can be by the oil in tail gas
Mud absorption, and the back pressure of diesel engine and temperature are increased, when temperature reaches 300 DEG C or more, metal filtering core is fired by burning red dot,
So that the greasy filth full combustion in metal filtering core, the greasy filth in tail gas is removed；Then tail gas enters back into diesel oil oxidation catalysis
In device, catalysis oxidation is carried out to CO, HC compound in tail gas, removes CO, HC compound in tail gas；Tail gas enters diesel oil
In grain catcher, burning again is carried out to reach realization regeneration, plays good tail gas clean-up effect.
Embodiment 2
Embodiment 2 further defines on the basis of embodiment 1: in step (2), tail gas enters the gold by inlet cylinder
Belong in filter core, wire is provided in the metal filtering core, for the greasy filth in tail gas to be adsorbed on to the surface of wire.
Embodiment 3
Embodiment 3 further defines on the basis of embodiment 2: when the temperature in metal filtering core reaches 300 DEG C, wire
It is fired by burning red dot, the greasy filth burning in the tail gas adsorbed in metal filtering core.
The tail gas of diesel engine enters in metal filtering core from inlet cylinder, and the wire in metal filtering core can be by diesel oil tail
Greasy filth in gas is adsorbed on the surface of wire, increases the back pressure of diesel engine and temperature, golden when temperature reaches 300 DEG C or more
Belonging to silk to be ignited, the greasy filth in metal filtering core is sufficiently burned, and the greasy filth in tail gas is removed, the greasy filth in tail gas is removed,
Tail gas can come into full contact with the catalytic coated layer on diesel oxidation catalyst inner hole wall, so that the oxidation for CO, HC compound
More uniform, transformation efficiency is higher, tail gas clean-up effect with higher.
Embodiment 4
Embodiment 4 further defines on the basis of embodiment 1: in step (3), the diesel oxidation catalyst inner surface is applied
It is covered with oxidation catalyst, the catalyst is with Al2O3For carrier, Pt content is 1.8g/dm3Four-way catalysts, the catalysis
Agent is in SO2Under the atmosphere of vapor, the aging 12h at a temperature of 550 DEG C.
Catalyst activity with higher, enables to the conversion ratio of CO, HC to reach 90%, the purification to carbon black pellet
Rate also can reach 40%.
Embodiment 5
Embodiment 5 further defines on the basis of embodiment 1: in step (3), the diesel oxidation catalyst inner surface is applied
It is covered with oxidation catalyst, the catalyst is with Al2O3For carrier, Pt content is 2.4g/dm3Four-way catalysts, the catalysis
Agent is in SO2Under the atmosphere of vapor, the aging 15h at a temperature of 620 DEG C.
Embodiment 6
Embodiment 6 further defines on the basis of embodiment 1: in step (3), the diesel oxidation catalyst inner surface is applied
It is covered with oxidation catalyst, the catalyst is with Al2O3For carrier, Pt content is 2.1g/dm3Four-way catalysts, the catalysis
Agent is in SO2Under the atmosphere of vapor, the aging 14h at a temperature of 580 DEG C.
Embodiment 7
Embodiment 7 further defines on the basis of embodiment 1: in step (4), being provided in the diesel particulate trap
Catalyst, the catalyst are perovskite type composite oxide catalyst.By in the filtered tail gas of diesel oxidation catalyst
There is also the NOx not converted completely, carbon black pellet, perovskite type composite oxide catalyst has carbon black pellet and NOx
There is preferable activity, it is higher for the catalytic activity of carbon black pellet burning, while NOx can be reduced to N2Also have preferable
Effect improves the clean-up effect to tail gas.
The present invention is provided with metal filtering core, can be by the oil of machine oil and carbon black pellet in diesel engine vent gas being mixed to form
Mud is adsorbed and is removed, and is increased the contact area between the catalyst coat in tail gas and subsequent diesel oxidation catalyst, is made
Must be more uniform for the oxidation of CO, HC compound, transformation efficiency is higher, tail gas clean-up effect with higher；Further, bavin
Oxidation catalyst coat is provided in oily oxidation catalyzer, activity with higher enables to the conversion ratio of CO, HC to reach
90%, 40% also can reach to the purifying rate of carbon black pellet；Further, to be provided with Ca-Ti ore type in diesel particulate trap compound
Oxide catalyst, it is higher for the catalytic activity of the carbon black pellet burning in tail gas, while NOx is reduced to N2Also have compared with
Good effect improves the clean-up effect to tail gas.
Although reference be made herein to invention has been described for the embodiment of the present invention, however, it is to be understood that art technology
Personnel can be designed that a lot of other modification and implementations, these modifications and implementations will fall in original disclosed in the present application
Then within scope and spirit.It more specifically, can be to theme in the range of description and claims disclosed in the present application
The building block and/or layout of composite configuration carry out a variety of variations and modifications.In addition to the change carried out to building block and/or layout
Shape and improvement are outer, and to those skilled in the art, other purposes also will be apparent.
Claims (6)
1. a kind of diesel engine vent gas filtering purification method, which is characterized in that use steps of processing:
(1) exhaust collection: the tail gas of diesel engine discharge is collected；
(2) metal filtering core filters: the tail gas that step (1) is collected into being transported in metal filtering core, for the machine oil in tail gas
It is filtered with the greasy filth that soot particulate is mixed to form；
(3) diesel oxidation catalyst filter: step (2) filtered tail gas is transported in diesel oxidation catalyst, for pair
The catalysis oxidations such as CO, HC compound in tail gas；
(4) diesel particulate trap filters: step (3) filtered tail gas being transported in diesel particulate trap, for going
Except the carbon black pellet object in tail gas；
(5) exhaust emissions: will be by step (4) filtered tail gas discharge up to standard.
2. diesel engine vent gas filtering purification method according to claim 1, it is characterised in that: in step (2), tail gas passes through
Inlet cylinder enters in the metal filtering core, is provided with wire in the metal filtering core, for adsorbing the greasy filth in tail gas
On the surface of wire.
3. diesel engine vent gas filtering purification method according to claim 2, it is characterised in that: when the temperature in metal filtering core
When reaching 300 DEG C, wire is fired by burning red dot, the greasy filth burning in the tail gas adsorbed in metal filtering core.
4. diesel engine vent gas filtering purification method according to claim 1, it is characterised in that: in step (3), the diesel oil
Oxidation catalyzer inner surface is coated with oxidation catalyst, and the catalyst is with Al2O3For carrier, Pt content is 1.8-2.4g/
dm3Four-way catalysts.
5. diesel engine vent gas filtering purification method according to claim 4, it is characterised in that: the catalyst is in SO2And water
Under the atmosphere of steam, the aging 12-15h at a temperature of 550-620 DEG C.
6. diesel engine vent gas filtering purification method according to claim 1, it is characterised in that: in step (4), the diesel oil
Catalyst is provided in grain catcher, the catalyst is perovskite type composite oxide catalyst.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811075909.8A CN109012178A (en) | 2018-09-14 | 2018-09-14 | A kind of diesel engine vent gas filtering purification method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811075909.8A CN109012178A (en) | 2018-09-14 | 2018-09-14 | A kind of diesel engine vent gas filtering purification method |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN109012178A true CN109012178A (en) | 2018-12-18 |
Family
ID=64622363
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201811075909.8A Pending CN109012178A (en) | 2018-09-14 | 2018-09-14 | A kind of diesel engine vent gas filtering purification method |
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|---|---|---|---|---|
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