CN107035481A - The high-order processing unit of diesel motor smoke evacuation purification - Google Patents
The high-order processing unit of diesel motor smoke evacuation purification Download PDFInfo
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- CN107035481A CN107035481A CN201610078290.0A CN201610078290A CN107035481A CN 107035481 A CN107035481 A CN 107035481A CN 201610078290 A CN201610078290 A CN 201610078290A CN 107035481 A CN107035481 A CN 107035481A
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- chamber
- filter element
- exhaust gas
- catalytic converter
- ceramic filter
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- 239000000779 smoke Substances 0.000 title abstract description 8
- 238000000746 purification Methods 0.000 title abstract description 5
- 239000000919 ceramic Substances 0.000 claims abstract description 68
- 230000003197 catalytic effect Effects 0.000 claims abstract description 49
- MWUXSHHQAYIFBG-UHFFFAOYSA-N nitrogen oxide Inorganic materials O=[N] MWUXSHHQAYIFBG-UHFFFAOYSA-N 0.000 claims abstract description 42
- XSQUKJJJFZCRTK-UHFFFAOYSA-N Urea Chemical compound NC(N)=O XSQUKJJJFZCRTK-UHFFFAOYSA-N 0.000 claims abstract description 24
- 239000004202 carbamide Substances 0.000 claims abstract description 24
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 claims abstract description 16
- 229910052757 nitrogen Inorganic materials 0.000 claims abstract description 8
- 239000007789 gas Substances 0.000 claims description 49
- VHUUQVKOLVNVRT-UHFFFAOYSA-N Ammonium hydroxide Chemical compound [NH4+].[OH-] VHUUQVKOLVNVRT-UHFFFAOYSA-N 0.000 claims description 7
- 235000011114 ammonium hydroxide Nutrition 0.000 claims description 7
- NLXLAEXVIDQMFP-UHFFFAOYSA-N Ammonium chloride Substances [NH4+].[Cl-] NLXLAEXVIDQMFP-UHFFFAOYSA-N 0.000 claims description 6
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 5
- 239000012466 permeate Substances 0.000 claims description 4
- QGZKDVFQNNGYKY-UHFFFAOYSA-N Ammonia Chemical compound N QGZKDVFQNNGYKY-UHFFFAOYSA-N 0.000 abstract description 20
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 abstract description 14
- 229910052799 carbon Inorganic materials 0.000 abstract description 14
- 239000002245 particle Substances 0.000 abstract description 13
- 229910021529 ammonia Inorganic materials 0.000 abstract description 9
- 239000002912 waste gas Substances 0.000 abstract description 6
- UGFAIRIUMAVXCW-UHFFFAOYSA-N Carbon monoxide Chemical compound [O+]#[C-] UGFAIRIUMAVXCW-UHFFFAOYSA-N 0.000 abstract description 5
- 229910002091 carbon monoxide Inorganic materials 0.000 abstract description 5
- 229930195733 hydrocarbon Natural products 0.000 abstract description 5
- 150000002430 hydrocarbons Chemical class 0.000 abstract description 5
- 239000004215 Carbon black (E152) Substances 0.000 abstract description 2
- 238000002485 combustion reaction Methods 0.000 abstract 1
- 238000001035 drying Methods 0.000 abstract 1
- 239000003517 fume Substances 0.000 abstract 1
- 238000005470 impregnation Methods 0.000 abstract 1
- 231100000614 poison Toxicity 0.000 abstract 1
- 230000007096 poisonous effect Effects 0.000 abstract 1
- 238000004891 communication Methods 0.000 description 7
- 239000003054 catalyst Substances 0.000 description 5
- 230000008929 regeneration Effects 0.000 description 5
- 238000011069 regeneration method Methods 0.000 description 5
- 229910052878 cordierite Inorganic materials 0.000 description 4
- JSKIRARMQDRGJZ-UHFFFAOYSA-N dimagnesium dioxido-bis[(1-oxido-3-oxo-2,4,6,8,9-pentaoxa-1,3-disila-5,7-dialuminabicyclo[3.3.1]nonan-7-yl)oxy]silane Chemical compound [Mg++].[Mg++].[O-][Si]([O-])(O[Al]1O[Al]2O[Si](=O)O[Si]([O-])(O1)O2)O[Al]1O[Al]2O[Si](=O)O[Si]([O-])(O1)O2 JSKIRARMQDRGJZ-UHFFFAOYSA-N 0.000 description 4
- 229910052751 metal Inorganic materials 0.000 description 4
- 239000002184 metal Substances 0.000 description 4
- 231100000331 toxic Toxicity 0.000 description 4
- 230000002588 toxic effect Effects 0.000 description 4
- 238000006243 chemical reaction Methods 0.000 description 3
- CURLTUGMZLYLDI-UHFFFAOYSA-N Carbon dioxide Chemical compound O=C=O CURLTUGMZLYLDI-UHFFFAOYSA-N 0.000 description 2
- 238000010531 catalytic reduction reaction Methods 0.000 description 2
- 238000003912 environmental pollution Methods 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 230000003647 oxidation Effects 0.000 description 2
- 238000007254 oxidation reaction Methods 0.000 description 2
- 230000008569 process Effects 0.000 description 2
- 239000004071 soot Substances 0.000 description 2
- KSPMJHKUXSQDSZ-UHFFFAOYSA-N [N].[N] Chemical compound [N].[N] KSPMJHKUXSQDSZ-UHFFFAOYSA-N 0.000 description 1
- 229910002092 carbon dioxide Inorganic materials 0.000 description 1
- 239000001569 carbon dioxide Substances 0.000 description 1
- 239000011248 coating agent Substances 0.000 description 1
- 238000000576 coating method Methods 0.000 description 1
- 230000008021 deposition Effects 0.000 description 1
- 239000003344 environmental pollutant Substances 0.000 description 1
- 239000000835 fiber Substances 0.000 description 1
- 238000001914 filtration Methods 0.000 description 1
- 239000003779 heat-resistant material Substances 0.000 description 1
- 230000008018 melting Effects 0.000 description 1
- 238000002844 melting Methods 0.000 description 1
- 239000002923 metal particle Substances 0.000 description 1
- 229910000069 nitrogen hydride Inorganic materials 0.000 description 1
- 231100000719 pollutant Toxicity 0.000 description 1
- 239000011148 porous material Substances 0.000 description 1
- 230000009467 reduction Effects 0.000 description 1
- 238000006722 reduction reaction Methods 0.000 description 1
- 239000010891 toxic waste Substances 0.000 description 1
- 238000004804 winding Methods 0.000 description 1
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
- F01N3/24—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 constructional aspects of converting apparatus
- F01N3/28—Construction of catalytic reactors
- F01N3/2882—Catalytic reactors combined or associated with other devices, e.g. exhaust silencers or other exhaust purification devices
-
- 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
- F01N3/10—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]
- F01N3/2073—Selective catalytic reduction [SCR] with means for generating a reducing substance from the exhaust gases
-
- 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
- F01N2250/00—Combinations of different methods of purification
- F01N2250/02—Combinations of different methods of purification filtering and catalytic conversion
-
- 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
- F01N2490/00—Structure, disposition or shape of gas-chambers
Landscapes
- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Combustion & Propulsion (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Health & Medical Sciences (AREA)
- Toxicology (AREA)
- Processes For Solid Components From Exhaust (AREA)
- Exhaust Gas After Treatment (AREA)
Abstract
A kind of high-order processing unit of diesel motor smoke evacuation purification, including a connecting pipe road, several CC Catalytic Converters, several through type ceramic elements and an at least wall-flow type filter core, the grade CC Catalytic Converter with each interval be located at the connecting pipe exhaust flow path front end, the through type ceramic element is with wall-flow type filter core then with the rear end for the exhaust flow path for being located at the connecting pipe at each interval, and the through type ceramic element passes through impregnation urea or ammonia and drying process with wall-flow type filter core, make in engine still imperfect combustion carbon particle and carbon monoxide totally, the black smoke waste gas such as hydrocarbon are when via emission by exhaust pipe, can directly be burnt purification by the CC Catalytic Converter of front end, and other poisonous fumes such as nitrogen oxides etc., then decomposition-reduction can be subject into nitrogen and moisture by urea or ammonia in the through type ceramic element by rear end and during wall-flow type filter core, to reduce the pollution to environment.
Description
Technical Field
The invention relates to a portable catalyst conversion device special for a diesel engine, in particular to a device capable of effectively and completely purifying waste gas discharged by the diesel engine and removing carbon deposition.
Background
A Diesel Particulate Filter (DPF) functions to capture exhaust gas burned by a diesel vehicle and filter carbon particulates. When the amount of trapped carbon particles is increased to a certain level, the ECU running computer of the vehicle performs a "filter regeneration" operation to burn the carbon particles in the filter into carbon dioxide to be discharged, thereby purifying the filter and maintaining the filtering function.
Exhaust gas emitted from diesel vehicles contains Nitrogen oxides (NOx) polluting the environment in addition to carbon particles, and thus it is known to treat the Nitrogen oxides by a catalytic reduction (SCR) system in which urea is injected into burned exhaust gas through a urea cylinder provided in an automobile to convert hot exhaust gas into Ammonia (Ammonia, NH3), and the Ammonia chemically reduces the Nitrogen oxides (NOx) in the catalytic reduction to Nitrogen (Nitrogen) and water, which do not affect the natural environment. Since the aforesaid conversion reduction ratio of diesel to urea is usually 20: 1 (i.e. 1 part of urea is needed for every 20 parts of diesel), the consumption of urea is very fast, and the urea must be added frequently to maintain normal operation, which is very troublesome to use and very costly.
Disclosure of Invention
The present invention is directed to overcoming the above-mentioned drawbacks of the prior art, and provides a high-level treatment device for purifying the exhaust gas of a diesel engine, which solves the problems of the conventional purification device for a diesel engine that the urea consumption is very fast, and the urea must be frequently added to maintain the normal operation, which is troublesome in use and costly in money.
The technical scheme adopted by the invention for solving the technical problems is as follows:
a high-order treatment device for purifying the exhausted smoke of diesel engine is composed of a communicating pipeline, several catalytic converters, several through-type ceramic filter cores and at least one wall-flow filter core, which are arranged at the front end of said communicating pipeline at intervals, and are immersed in urea or ammonia and dried to decompose the carbon particles, CO, and the toxic waste gas (NOx) into nitrogen and water, so as to reduce the pollution to the environment.
The connecting pipeline comprises a plurality of chambers, and every two adjacent chambers are connected by at least one channel to form a waste gas inlet and a waste gas outlet which are positioned at two opposite ends; a plurality of catalytic converters disposed in successive chambers behind the exhaust gas inlet; a plurality of straight-through ceramic filter elements arranged in a plurality of continuous chambers behind the catalytic converter farthest from the exhaust gas inlet; at least one wall-flow filter element disposed in the chamber behind the straight-through ceramic filter element farthest from the exhaust gas inlet; the through-type ceramic filter element and the wall-flow type filter element are soaked in urea solution or ammonia solution in advance, so that the urea solution or the ammonia solution permeates into the capillary holes of the through-type ceramic filter element and the wall-flow type filter element and then is dried, and the through-type ceramic filter element and the wall-flow type filter element have the function of reducing nitrogen oxides into nitrogen and water.
In a preferred embodiment, the present invention comprises a first chamber, a second chamber, a third chamber, a fourth chamber and a fifth chamber arranged in sequence, wherein the second chamber and the third chamber are connected in parallel and commonly connected in series with the first chamber and commonly connected in series with the fourth chamber, the fifth chamber is connected in series with the fourth chamber, the first, second and third chambers are respectively provided with a first catalytic converter, a second catalytic converter and a third catalytic converter, the fourth chamber is axially provided with a first straight-through ceramic filter element and a second straight-through ceramic filter element in sequence, and the fifth chamber is provided with a wall-flow filter element.
In another preferred embodiment, the present invention may include a first chamber, a second chamber, a third chamber, a fourth chamber and a fifth chamber sequentially disposed, the second chamber and the third chamber are connected in parallel and commonly connected in series with the first chamber and commonly connected in series with the fourth chamber, the fifth chamber is connected in series with the fourth chamber, the first chamber is provided with a first catalyst converter, the second chamber is axially sequentially provided with a second catalyst converter and a first through type ceramic filter element, the third chamber is axially sequentially provided with a third catalyst converter and a second through type ceramic filter element, the fourth chamber is axially sequentially provided with a third through type ceramic filter element and a fourth through type ceramic filter element, and the fifth chamber is provided with a wall flow type filter element.
Alternatively, the present invention may replace the wall flow filter element with a fifth flow-through ceramic filter element in the fifth chamber.
In another preferred embodiment, the present invention may include a first chamber, a second chamber, a third chamber and a fourth chamber sequentially disposed, the second chamber and the third chamber are connected in parallel and commonly connected in series with the first chamber and commonly connected in series with the fourth chamber, the first chamber is provided with a first catalytic converter, the second chamber is axially sequentially provided with a second catalytic converter and a first straight-through ceramic filter element, the third chamber is axially sequentially provided with a third catalytic converter and a second straight-through ceramic filter element, and the fourth chamber is provided with a wall-flow filter element.
Preferably, the first chamber, the second chamber and the third chamber are connected by a first diversion channel, and the second chamber, the third chamber and the fourth chamber are connected by a second diversion channel.
Preferably, the present invention is connected between the fourth chamber and the fifth chamber by a straight channel.
In another embodiment, the present invention may be connected between the second diversion channel and the fifth chamber by a straight channel.
The invention has the advantages that: after the invention is installed on a vehicle, carbon particles in the exhaust gas can be automatically combusted and purified by a catalytic converter when the vehicle runs, and the ECU running computer does not need to carry out filter regeneration after the carbon particles are collected. In addition, the invention can operate without adding urea frequently as the prior similar devices, when the straight-through ceramic filter element and the wall-flow filter element gradually lose effectiveness and reduce, only urea or ammonia water is needed to be sprayed from the exhaust outlet so as to lead the straight-through ceramic filter element and the wall-flow filter element to absorb and permeate again, and the use is very convenient.
The invention has the advantages of solving the problems that the existing diesel engine purification treatment device has trouble in use and cost in money because urea is consumed very quickly and the normal operation can be maintained only by adding the urea frequently.
Drawings
The invention is further illustrated with reference to the following figures and examples.
FIG. 1 is a schematic plan sectional view of a first embodiment of the present invention;
FIG. 2 is a schematic plan sectional view of a second embodiment of the present invention;
fig. 3 is a schematic plan sectional view of a third embodiment of the present invention.
The reference numbers in the figures illustrate:
1 … … communicating pipe
11 … … waste gas inlet
12 … … waste gas outlet
13 … … first chamber
14 … … second Chamber
15 … … third Chamber
16 … … fourth Chamber
17 … … fifth Chamber
18a … … first diversion channel
18b … … second diversion channel
19 … … straight channel
2a … … first catalytic converter
2b … … second catalytic converter
2c … … third catalytic converter
3a … … first straight-through ceramic filter element
3b … … second straight-through ceramic filter element
3c … … third straight-through ceramic filter element
3d … … fourth straight-through ceramic filter element
3e … … fifth straight-through ceramic filter element
4 … … wall flow filter element
Detailed Description
First embodiment
As shown in fig. 1, the first embodiment of the high-level treatment device for purifying the exhaust gas of the diesel engine according to the present invention may include a communication pipe 1, wherein the communication pipe 1 includes a first chamber 13, a second chamber 14, a third chamber 15, a fourth chamber 16 and a fifth chamber 17, which are sequentially arranged, wherein the second chamber 14 and the third chamber 15 are connected in parallel and are commonly connected in series with the first chamber 13 through a Y-shaped first diversion channel 18a, and are commonly connected in series with the fourth chamber 16 through a Y-shaped second diversion channel 18 b; the fifth chamber 17 is connected in series with the fourth chamber 16 through a long passage 19; the front end of the first chamber 13 is connected with an exhaust gas inlet 11; the end of the fifth chamber 17 is connected to an exhaust gas outlet 12.
In the first embodiment, a first catalytic converter 2a, a second catalytic converter 2b and a third catalytic converter 2c are respectively arranged in the first, second and third chambers 13, 14, 15, and a first straight-through ceramic filter element 3a and a second straight-through ceramic filter element 3b are axially and sequentially arranged in the fourth chamber 16; a wall-flow filter element 4 is disposed in the fifth chamber 17. The catalytic converter is used for reducing 90% of toxic carbon monoxide and 85% of hydrocarbon discharged from an engine, and is formed by extruding and processing cordierite (cordierite) ceramic. Cordierite is a superior heat-resistant material (melting point up to 1400 ℃ C.) and has a thermal expansion coefficient close to zero, so that it can endure a sharp temperature difference, and its mechanical strength at high temperature (1200 ℃ C. or less) rather increases with temperature rise.
The straight-through ceramic filter element utilizes the porosity characteristic of cordierite ceramic to trap particulate pollutants emitted by a diesel engine, and each channel of the filter element is open at one end and closed at the other end, thereby forcing exhaust gas to pass through the porous ceramic wall. Soot particles will be trapped on the channels because they are larger than the pores of the ceramic walls. When the filter element load reaches a limit, the soot must be burned (oxidized) to restore the filter element function, a process known as "regeneration". In order to reduce the back pressure and avoid influencing the horsepower of the engine, the capacity of the ceramic filter element with the exhaust volume of more than 2 times of that of the engine is generally recommended to be adopted as a standard.
The wall flow type filter element is a metal honeycomb filter element which is formed by winding a plurality of layers of metal corrugated plates with shovel structures and metal wire screen plates and is processed by adopting a metal particle collector and a coating oxidation catalyst (DOC). DOC continuously generates NO in a proper temperature range (200 ℃ -450 ℃)2And flows into the particle trap, NO2The oxidation regeneration reaction with the carbon particles deposited on the metal fiber felt plate is continuously carried out in a proper temperature range (200-450 ℃), and the process is called continuous passive regeneration. The particulate trap cooperates with the DOC to reduce carbon particulates in the exhaust.
The first and second through-type ceramic filter elements 3a and 3b and the wall-flow type filter element 4 are immersed in a urea solution or an ammonia solution in advance, so that the urea solution or the ammonia solution permeates into the capillary holes of the through-type ceramic filter elements and the wall-flow type filter elements and then is dried, and the through-type ceramic filter elements and the wall-flow type filter elements have the function of reducing nitrogen oxides into nitrogen and water.
The operation mode of the invention after being installed on the vehicle is as follows: when exhaust gas discharged from the diesel engine enters from the exhaust gas inlet 11 at one end of the communication pipe 1 and is discharged from the exhaust gas outlet 12 at the other end, the exhaust gas first enters the first chamber 13, rapidly passes through the first catalytic converter 2a, then passes through the first diversion channel 18a, passes through the second catalytic converter 2b and the third catalytic converter 2c in the second chamber 14 and the third chamber 15, and then passes through the first straight-through ceramic filter element 3a and the second straight-through ceramic filter element 3b in the fourth chamber 16 in a confluent manner, so that carbon particles, carbon monoxide, hydrocarbons and other black smoke exhaust gas which are not completely combusted in the engine can be directly combusted and purified by the high temperature of the first to third catalytic converters 2a, 2b, 2c at the front end when being discharged through the exhaust pipe, and other toxic exhaust gas such as nitrogen oxide (NOx) and the like can pass through the first and second straight-through ceramic filter elements 3a, 3b, 2c at the rear end, 3b and the wall-flow filter element 4 are decomposed and reduced into nitrogen and moisture by urea or ammonia so as to reduce the pollution to the environment.
Second embodiment
As shown in fig. 2, a second embodiment of the high-level treatment device for purifying the exhaust gas of the diesel engine according to the present invention may include a communication pipe 1, wherein the communication pipe 1 includes a first chamber 13, a second chamber 14, a third chamber 15, a fourth chamber 16 and a fifth chamber 17 sequentially arranged, wherein the second chamber 14 and the third chamber 15 are connected in parallel and are commonly connected in series with the first chamber 13 through a Y-shaped first diversion channel 18a, and are commonly connected in series with the fourth chamber 16 through a Y-shaped second diversion channel 18 b; the fifth chamber 17 is connected in series with the fourth chamber 16 through a long passage 19; the front end of the first chamber 13 is connected with an exhaust gas inlet 11; the end of the fifth chamber 17 is connected to an exhaust gas outlet 12.
In the second embodiment, a first catalytic converter 2a is arranged in the first chamber 13; a second catalytic converter 2b and a first straight-through ceramic filter element 3a are arranged in the second chamber 14 in sequence and axially; a third catalytic converter 2c and a second straight-through ceramic filter element 3b are axially arranged in sequence in the third chamber 15; a third straight-through ceramic filter element 3c and a fourth straight-through ceramic filter element 3d are axially and sequentially arranged in the fourth chamber 16; a wall-flow filter element 4 is disposed in the fifth chamber 17.
The second embodiment operates as follows: when exhaust gas discharged from the diesel engine is introduced from the exhaust gas inlet 11 at one end of the communication pipe 1 and discharged from the exhaust gas outlet 12 at the other end, the exhaust gas first enters the first chamber 13 and rapidly passes through the first catalytic converter 2a, then passes through the first diversion channel 18a, then passes through the second catalytic converter 2b and the first straight-through ceramic filter element 3a in the second chamber 14, and passes through the third catalytic converter 2c and the second straight-through ceramic filter element 3b in the third chamber 15, and then passes through the third straight-through ceramic filter element 3c and the fourth straight-through ceramic filter element 3d in the fourth chamber 16, and passes through the wall-flow filter element 4 in the fifth chamber 17, so that carbon particles that have not completely burned out in the engine and black smoke exhaust gas such as carbon monoxide, hydrocarbons and the like can be discharged from the first to third catalytic converters 2a, b, c, d and the like at the front end through the exhaust pipe, 2b, 2c, while other toxic exhaust gas such as nitrogen oxides (NOx) and the like can be decomposed and reduced into nitrogen and moisture by urea or ammonia when passing through the first to fourth straight-through ceramic filter elements 3a to 3d and the wall-flow filter element 4 at the rear end, so as to reduce environmental pollution.
Third embodiment
As shown in fig. 3, the third embodiment of the present invention may include a communicating pipe 1, the communicating pipe 1 includes a first chamber 13, a second chamber 14, a third chamber 15 and a fourth chamber 16 sequentially arranged, wherein the second chamber 14 and the third chamber 15 are connected in parallel and are connected in series with the first chamber 13 through a Y-shaped first diversion channel 18a, and are connected in series with a straight channel 19 through a Y-shaped second diversion channel 18b, and the straight channel 19 is connected in series with the fourth chamber 16; the front end of the first chamber 13 is connected with an exhaust gas inlet 11; the end of the fourth chamber 16 is connected to an exhaust outlet 12.
In the third embodiment, a first catalytic converter 2a is arranged in the first chamber 13; a second catalytic converter 2b and a first straight-through ceramic filter element 3a are arranged in the second chamber 14 in sequence and axially; a third catalytic converter 2c and a second straight-through ceramic filter element 3b are axially arranged in sequence in the third chamber 15; a wall-flow filter element 4 is disposed in the fourth chamber 16.
The third embodiment operates as follows: when exhaust gas discharged from the diesel engine is introduced from the exhaust gas inlet 11 at one end of the communication pipe 1 and discharged from the exhaust gas outlet 12 at the other end, the exhaust gas first enters the first chamber 13 and rapidly passes through the first catalytic converter 2a, then passes through the first diversion passage 18a, then passes through the second catalytic converter 2b and the first straight-through ceramic filter element 3a in the second chamber 14, and passes through the third catalytic converter 2c and the second straight-through ceramic filter element 3b in the third chamber 15, and then merges again through the wall-flow filter element 4 in the fourth chamber 16, so that carbon particles which have not been completely burned up in the engine and black smoke exhaust gas such as carbon monoxide, hydrocarbons, etc. can be directly burned and purified by the high temperature of the first to third catalytic converters 2a, 2b, 2c at the front end while other toxic exhaust gas such as nitrogen oxides (NOx) etc. is discharged through the exhaust pipe, the urea or ammonia can be decomposed and reduced into nitrogen and moisture while passing through the first and second flow-through ceramic filter elements 3a to 3d and the wall-flow filter element 4 at the rear end, so as to reduce environmental pollution.
The above description is only a preferred embodiment of the present invention, and is not intended to limit the present invention in any way, and all simple modifications, equivalent variations and modifications made to the above embodiment according to the technical spirit of the present invention still fall within the scope of the technical solution of the present invention.
Claims (8)
1. A high-order treatment device for purifying exhaust gas of a diesel engine is characterized by comprising:
a communicating pipeline, which comprises a plurality of chambers, wherein two adjacent chambers are connected by at least one channel to form an exhaust gas inlet and an exhaust gas outlet which are positioned at two opposite ends;
a plurality of catalytic converters disposed in successive chambers behind the exhaust gas inlet;
a plurality of straight-through ceramic filter elements arranged in a plurality of continuous chambers behind the catalytic converter farthest from the exhaust gas inlet;
at least one wall-flow filter element disposed in the chamber behind the straight-through ceramic filter element farthest from the exhaust gas inlet;
wherein,
the through-type ceramic filter element and the wall-flow type filter element are soaked in urea solution or ammonia solution in advance, so that the urea solution or the ammonia solution permeates into the capillary holes of the through-type ceramic filter element and the wall-flow type filter element and then is dried, and the through-type ceramic filter element and the wall-flow type filter element have the function of reducing nitrogen oxides into nitrogen and water.
2. The high-stage treatment device for purifying the exhaust gas of a diesel engine as claimed in claim 1, comprising a first chamber, a second chamber, a third chamber, a fourth chamber and a fifth chamber arranged in sequence, wherein the second chamber and the third chamber are connected in parallel with each other, are commonly connected in series with the first chamber, and are commonly connected in series with the fourth chamber, the fifth chamber is connected in series with the fourth chamber, the first, second and third chambers are respectively provided with a first catalytic converter, a second catalytic converter and a third catalytic converter, the fourth chamber is axially provided with a first straight-through ceramic filter element and a second straight-through ceramic wall-flow filter element in sequence, and the fifth chamber is provided with a filter element.
3. The high-stage treatment device for purifying the exhaust gas of the diesel engine as claimed in claim 1, comprising a first chamber, a second chamber, a third chamber, a fourth chamber and a fifth chamber arranged in sequence, wherein the second chamber and the third chamber are connected in parallel with each other, are commonly connected in series with the first chamber, and are commonly connected in series with the fourth chamber, the fifth chamber is connected in series with the fourth chamber, the first chamber is provided with a first catalytic converter, the second chamber is axially provided with a second catalytic converter and a first through ceramic filter element in sequence, the third chamber is axially provided with a third catalytic converter and a second through ceramic filter element in sequence, the fourth chamber is axially provided with a third through ceramic filter element and a fourth through ceramic filter element in sequence, and the fifth chamber is provided with a wall-flow filter element.
4. The high-stage treatment device for purifying the exhaust gas of a diesel engine as claimed in claim 1, comprising a first chamber, a second chamber, a third chamber and a fourth chamber arranged in sequence, wherein the second chamber and the third chamber are connected in parallel with each other, are commonly connected in series with the first chamber, and are commonly connected in series with the fourth chamber, the first chamber is provided with a first catalytic converter, the second chamber is axially provided with a second catalytic converter and a first through type ceramic filter element in sequence, the third chamber is axially provided with a third catalytic converter and a second through type ceramic filter element in sequence, and the fourth chamber is provided with a wall flow type filter element.
5. The high-stage treatment device for purifying the exhaust gas of the diesel engine as recited in any one of claims 2 to 4, wherein the first chamber, the second chamber and the third chamber are connected by a first diversion channel, and the second chamber, the third chamber and the fourth chamber are connected by a second diversion channel.
6. The high-stage treatment device for purifying the exhaust gas of the diesel engine as recited in claim 2 or 3, wherein the fourth chamber and the fifth chamber are connected by a straight passage.
7. The high-stage treatment device for purifying diesel engine exhaust gas of claim 4, wherein the second diversion channel is connected with the fifth chamber by a straight channel.
8. The high-stage treatment device for purifying the exhaust gas of the diesel engine as claimed in claim 2, wherein a fifth flow-through ceramic filter element is disposed in the fifth chamber in place of the wall-flow filter element.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201610078290.0A CN107035481A (en) | 2016-02-04 | 2016-02-04 | The high-order processing unit of diesel motor smoke evacuation purification |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201610078290.0A CN107035481A (en) | 2016-02-04 | 2016-02-04 | The high-order processing unit of diesel motor smoke evacuation purification |
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Cited By (1)
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| CN113864030A (en) * | 2021-08-16 | 2021-12-31 | 安庆中船柴油机有限公司 | Diesel engine airborne urea injection system |
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