CN111102037B - Engine catalysis type particulate trap with amortization guiding device - Google Patents
Engine catalysis type particulate trap with amortization guiding device Download PDFInfo
- Publication number
- CN111102037B CN111102037B CN201911307605.4A CN201911307605A CN111102037B CN 111102037 B CN111102037 B CN 111102037B CN 201911307605 A CN201911307605 A CN 201911307605A CN 111102037 B CN111102037 B CN 111102037B
- Authority
- CN
- China
- Prior art keywords
- silencing
- pipe
- catalytic
- exhaust
- perforated plate
- 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.)
- Active
Links
- 238000006555 catalytic reaction Methods 0.000 title description 4
- 230000003197 catalytic Effects 0.000 claims abstract description 92
- 230000001743 silencing Effects 0.000 claims abstract description 69
- 239000002245 particle Substances 0.000 claims abstract description 59
- 238000006243 chemical reaction Methods 0.000 claims abstract description 47
- 239000000969 carrier Substances 0.000 claims abstract description 30
- 239000004113 Sepiolite Substances 0.000 claims description 14
- TUKQLEWOUPCTOS-UHFFFAOYSA-N dimagnesium;dioxido(oxo)silane;hydroxy-oxido-oxosilane;hydrate Chemical compound O.[Mg+2].[Mg+2].O[Si]([O-])=O.O[Si]([O-])=O.[O-][Si]([O-])=O TUKQLEWOUPCTOS-UHFFFAOYSA-N 0.000 claims description 14
- 229910052624 sepiolite Inorganic materials 0.000 claims description 14
- 235000019355 sepiolite Nutrition 0.000 claims description 14
- 239000000463 material Substances 0.000 claims description 9
- 239000003344 environmental pollutant Substances 0.000 claims description 7
- 231100000719 pollutant Toxicity 0.000 claims description 7
- 230000001590 oxidative Effects 0.000 claims description 3
- 230000015572 biosynthetic process Effects 0.000 claims description 2
- 238000004140 cleaning Methods 0.000 claims description 2
- 238000005755 formation reaction Methods 0.000 claims description 2
- 238000000034 method Methods 0.000 claims description 2
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 2
- 230000004323 axial length Effects 0.000 claims 1
- 239000002994 raw material Substances 0.000 claims 1
- 238000000746 purification Methods 0.000 abstract description 8
- 239000003054 catalyst Substances 0.000 description 6
- 238000009826 distribution Methods 0.000 description 5
- 230000000694 effects Effects 0.000 description 4
- 229910000510 noble metal Inorganic materials 0.000 description 4
- 238000004088 simulation Methods 0.000 description 4
- 238000005457 optimization Methods 0.000 description 3
- 238000002791 soaking Methods 0.000 description 3
- VEXZGXHMUGYJMC-UHFFFAOYSA-N HCl Chemical compound Cl VEXZGXHMUGYJMC-UHFFFAOYSA-N 0.000 description 2
- 230000002378 acidificating Effects 0.000 description 2
- 230000018109 developmental process Effects 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 239000012530 fluid Substances 0.000 description 2
- 238000002360 preparation method Methods 0.000 description 2
- 230000002035 prolonged Effects 0.000 description 2
- 230000001603 reducing Effects 0.000 description 2
- 238000010521 absorption reaction Methods 0.000 description 1
- OKTJSMMVPCPJKN-UHFFFAOYSA-N carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 1
- 238000001035 drying Methods 0.000 description 1
- 238000003379 elimination reaction Methods 0.000 description 1
- 238000009413 insulation Methods 0.000 description 1
- 231100000956 nontoxicity Toxicity 0.000 description 1
- 239000011148 porous material Substances 0.000 description 1
- 230000008929 regeneration Effects 0.000 description 1
- 238000011069 regeneration method Methods 0.000 description 1
- 230000035939 shock Effects 0.000 description 1
- 239000004071 soot Substances 0.000 description 1
Images
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
-
- 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
- B01D53/944—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
- 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
- B01D53/9445—Simultaneously removing carbon monoxide, hydrocarbons or nitrogen oxides making use of three-way catalysts [TWC] or four-way-catalysts [FWC]
-
- 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
- F01N1/00—Silencing apparatus characterised by method of silencing
- F01N1/08—Silencing apparatus characterised by method of silencing by reducing exhaust energy by throttling or whirling
- F01N1/082—Silencing apparatus characterised by method of silencing by reducing exhaust energy by throttling or whirling the gases passing through porous members
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
- F01N—GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR MACHINES OR ENGINES IN GENERAL; GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR INTERNAL COMBUSTION ENGINES
- F01N13/00—Exhaust or silencing apparatus characterised by constructional features ; Exhaust or silencing apparatus, or parts thereof, having pertinent characteristics not provided for in, or of interest apart from, groups F01N1/00 - F01N5/00, F01N9/00, F01N11/00
- F01N13/08—Other arrangements or adaptations of exhaust conduits
-
- 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
Abstract
The invention discloses an engine catalytic particle trap with a silencing and flow guiding device, which consists of an air inlet flange, a primary small hole silencing air inlet pipe, a secondary small hole silencing pipe, a shell, a damping layer of a catalytic conversion part, a gap structure, a catalytic particle trapping part, a damping layer of the catalytic particle trapping part, a primary silencing perforated plate, a secondary silencing perforated plate, a shrinkage pipe, an exhaust pipe and an exhaust flange. The double-layer silencing perforated plate with the novel double-stage sleeve small hole silencing pipe and the staggered small holes is adopted, the shape of a catalytic conversion part carrier is improved, tail gas purification and silencing aftertreatment can be further optimized, and the double-layer silencing perforated plate has the advantages of compact structure, good performance, stable operation and the like.
Description
Technical Field
The invention relates to the technical field of engine tail gas purification, in particular to an engine catalytic type particle trap with a silencing and flow guiding device.
Background
Along with the rapid advance of economic strength in China, the quality of life of people is continuously improved, the demand of people on motor vehicles is gradually increased, and the quantity of the motor vehicles to be kept is rapidly increased. Increasingly strict emission regulations put higher demands on engine emission control, and the emission of engine particles controlled by only an internal purification mode cannot meet the requirements of current emission standards and regulations, and a catalytic converter and a catalytic type particle trap are one of the most effective and most potential technologies for controlling the emission of pollutants and particles in the tail gas of an engine at present. Catalytic conversionThe device can purify pollutants such as HC and CO in the exhaust gas of the engine and convert NO in the exhaust gas into NO with strong oxidizing property2. The catalytic type particle trap can realize the trapping of particles in the tail gas of an engine through a multi-pore channel structure, and NO is2Continuously oxidize the particles in the filter body of the particle catcher, thereby realizing the regeneration of the catalytic particle catcher.
In urban noise pollution, the noise generated by motor vehicles accounts for a large proportion, and the noise brings great harm to daily life and health of people. In motor vehicle noise pollution, the exhaust system noise of the engine accounts for a large proportion. With the continuous development of engine technology, the engine speed and power are greatly improved, and the exhaust noise is larger and larger. Currently, the most effective method of controlling exhaust noise is to add an exhaust muffler after the engine.
In order to save the space of an exhaust aftertreatment system, a tail gas purification device and an exhaust noise control device of an engine can be organically combined and designed into an integrated structure, so that the dual functions of engine tail gas purification and exhaust noise control are realized. Therefore, the design and development of the catalytic type particulate trap of the engine, which has the advantages of compact structure, good performance and stable operation, have important significance.
Disclosure of Invention
Aiming at the defects of the prior art, the invention provides an engine catalytic type particle trap with a silencing and flow guiding device, the integrated structural design can purify pollutants such as HC, CO, PM and the like in exhaust gas discharged by an engine, meanwhile, the exhaust noise of the engine is controlled by arranging the silencing structure, and meanwhile, the front silencing structure with a certain flow guiding effect can enable the exhaust gas in a catalytic conversion part carrier to be distributed more uniformly, so that the carrier utilization rate is improved, and the service life is prolonged.
The technical scheme adopted by the invention is as follows: the engine catalytic particle trap with the silencing and flow guiding device is used in an engine exhaust system, preferably, the engine catalytic particle trap with the silencing and flow guiding device is horizontally arranged in an assembly state, and is characterized in that structures such as a primary small hole silencing air inlet pipe, a secondary small hole silencing pipe, a catalytic conversion part damping layer, a catalytic conversion part, a gap structure, a catalytic particle trapping part damping layer, a primary silencing perforated plate and a secondary silencing perforated plate are arranged in a shell with a circular cross section.
The right side of the first-stage small-hole noise-reduction air inlet pipe is in a closed state, and a small hole is formed in the pipe wall in the shell; the axis of the second-stage small-hole silencing inlet pipe coincides with the axis of the first-stage small-hole silencing inlet pipe, small holes are formed in the pipe wall and the right side of the pipe wall, and the small holes of the first-stage small-hole silencing inlet pipe and the small holes of the second-stage small-hole silencing inlet pipe are uniformly distributed in the embodiment.
The catalytic conversion part of carriers are arranged in the radial and right areas of the secondary small-hole silencing pipe, the carrier areas are all porous media, the material of the carrier areas is sepiolite, and the surface of the carrier areas is coated with a noble metal catalyst.
The catalytic type particle trapping part is composed of a series of inlet and outlet channels which are continuously and alternately blocked, exhaust enters the trapping part from an inlet channel, particles are trapped through the wall surface of a porous medium, then airflow flows out from outlet channels distributed around the inlet channel, the porous medium carrier material of the catalytic type particle trapping part is sepiolite, and the surface of the porous medium carrier material is coated with a noble metal catalyst.
Further, the preparation material of the catalytic conversion part carrier porous medium carrier is sepiolite, and the preparation method comprises the following steps: soaking sepiolite in hydrochloric acid with the concentration of 1mol/L for treatment for 18h, drying and roasting to obtain acidic sepiolite, soaking the acidic sepiolite in a catalyst solution with a certain concentration for ultrasonic soaking treatment, and finally roasting at a high temperature and a constant temperature to obtain the catalyst-loaded sepiolite carrier.
The catalytic conversion section and the catalytic particulate trap section each have a spacing from the inner surface of the housing that may vary depending on the type and design of the device used. The space between the two layers is filled with a shock absorption layer which can provide elastic support for the catalytic conversion part and the catalytic type particle trapping part. The elastomeric damping layer provides both thermal insulation to the external environment and mechanical support to the fragile structure, thereby protecting the fragile structure from mechanical impact over a wide range of aftertreatment operating temperatures.
The closed space formed between the right side of the catalytic conversion part and the left side of the catalytic type particle trapping part is of a middle gap structure, and the width of the gap structure is 10-50 mm.
One-level amortization perforated plate and second grade amortization perforated plate arrange in catalysis type particle entrapment part right side, and evenly distributed has been put to the equipartition on one-level amortization perforated plate and the second grade amortization perforated plate aperture, and the aperture is the staggered arrangement on one-level amortization perforated plate and the second grade amortization perforated plate, and aperture axis does not all be on same straight line on one-level amortization perforated plate and the second grade amortization perforated plate promptly.
Furthermore, numerical simulation is carried out on an engine catalytic type particle trap model with a silencing and flow guiding device by using Fluent software, and guidance can be provided for the structural optimization design of the model.
Compared with the prior art, the invention has the beneficial effects that:
(1) the novel double-stage sleeve small-hole silencing pipe can effectively eliminate exhaust noise of an engine and simultaneously play a certain role in flow guiding, so that automobile exhaust in a catalytic conversion part of a carrier is distributed more uniformly, the utilization rate of the carrier is improved, and the service life of the carrier is prolonged;
(2) by improving the shape of the carrier of the catalytic conversion part, the contact area between the exhaust gas of the engine and the catalytic conversion part is increased, thereby improving the purification efficiency of pollutants such as HC, CO and the like in the exhaust gas of the engine and the conversion of NO to NO2The conversion efficiency of (a);
(3) the double-layer silencing perforated plate with the staggered small holes is arranged, so that the back-and-forth reflection flow and energy attenuation of the tail gas of the engine are increased, and the aims of silencing and denoising are fulfilled;
(4) the catalytic conversion part and the catalytic type particle trapping part are connected in series, harmful gas in automobile exhaust emission can be effectively reduced, tiny particles in the exhaust can be trapped through mechanisms such as chemical reaction, adsorption, deposition, impact and the like, the emission concentration of pollutants in automobile exhaust is greatly reduced, and the porous medium characteristics of the carriers of the catalytic conversion part and the catalytic type particle trapping part also have certain effects on the aspect of further reducing exhaust noise;
(5) the exhaust gas purified by the catalytic conversion part can be redistributed to enter the catalytic type particle trapping part by arranging a certain gap structure between the right side of the catalytic conversion part and the left side of the catalytic type particle trapping part, so that the uniformity of the exhaust gas flow is effectively adjusted, and the particle trapping efficiency is improved;
(6) sepiolite with high thermal stability, high adsorptivity, large specific surface area, no toxicity and no radioactivity is used as a catalytic conversion part and a catalytic type particle trapping part carrier, so that the tail gas purification efficiency can be effectively improved;
(7) the integrated structure design of the exhaust purification and the noise elimination of the engine can be realized, the space structure of the exhaust aftertreatment system can be optimized and saved, and the integrated structure has the advantages of compact structure, good performance, stable operation and the like.
Drawings
FIG. 1 is a half-sectional view of an engine catalytic particulate trap with a sound-deadening flow-guiding device. In the figure: the device comprises an air inlet flange, a primary small hole silencing air inlet pipe, a secondary small hole silencing pipe, a shell, a catalytic conversion part damping layer, a catalytic conversion part, a gap structure, a catalytic particle trapping part damping layer, a primary silencing perforated plate, a secondary silencing perforated plate, a contraction pipe, a 13 exhaust pipe and an exhaust flange, wherein the primary small hole silencing air inlet pipe is 1, the secondary small hole silencing air inlet pipe is 2, the secondary small hole silencing pipe is 3, the shell is 4, the catalytic conversion part damping layer is 5, the catalytic conversion part damping layer is 6, the catalytic conversion part is 7, the gap structure is 8, the catalytic particle trapping part is 9, the catalytic particle trapping part damping layer is 10, the primary silencing perforated plate is 11, the secondary silencing perforated plate is 12, the contraction pipe is 13, and the exhaust flange is 14.
FIG. 2 is a flow pattern of internal passages of a filter body of a catalytic particle trap portion of an engine catalytic particle trap having a noise reduction and flow guide device.
FIG. 3 is a cloud diagram of a two-dimensional CFD simulated velocity vector distribution of a centerplane of an engine catalyzed particulate trap having a sound attenuating and flow directing device.
FIG. 4 is a cloud diagram of a two-dimensional CFD simulated pressure distribution of a center plane of an engine catalyzed particulate trap with a sound attenuating and flow directing device.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
Referring to fig. 1, an engine catalytic particle trap with a silencing and flow guiding device comprises an air inlet flange 1, a primary small hole silencing air inlet pipe 2, a secondary small hole silencing pipe 3, a shell 4, a catalytic conversion part damping layer 5, a catalytic conversion part 6, a gap structure 7, a catalytic particle trapping part 8, a catalytic particle trapping part damping layer 9, a primary silencing perforated plate 10, a secondary silencing perforated plate 11, a contraction pipe 12, an exhaust pipe 13 and an exhaust flange 14.
The right side of the first-stage small-hole noise-reduction air inlet pipe 2 is in a closed state, and a small hole is formed in the pipe wall in the shell 4; the axes of the second-level small-hole silencing pipe 3 and the first-level small-hole silencing air inlet pipe 2 are coincided, and small holes are formed in the pipe wall; the carriers of the catalytic conversion part 6 are arranged in the radial and right areas of the secondary small-hole silencing pipe 3, the carrier areas are porous media, the material of the carrier areas is sepiolite, and the surface of the carrier areas is coated with a noble metal catalyst; the catalytic type particle trapping part 8 is composed of a series of inlet and outlet channels which are continuously and alternately blocked as shown in figure 2, exhaust enters the trapping part from the inlet channels, particles are trapped through the wall surface of a porous medium, then airflow flows out from outlet channels distributed around the inlet channels, the porous medium carrier material of the catalytic type particle trapping part is sepiolite, and the surface of the porous medium carrier material is coated with a noble metal catalyst; the carriers of the catalytic conversion part 6 and the catalytic type particle trapping part 8 are respectively spaced from the inner surface of the shell 4 by a certain distance, and the distance is filled with the damping layer 5 of the catalytic conversion part or the damping layer 9 of the catalytic type particle trapping part; the closed space formed between the right side of the catalytic conversion section 6 and the left side of the catalytic type particulate trapping section 8 is a middle gap structure 7; one-level amortization perforated plate 10 and second grade amortization perforated plate 11 arrange in the 8 right sides of catalysis type particle entrapment part, and evenly distributed's aperture has been put to one-level amortization perforated plate 10 and second grade amortization perforated plate 11, and aperture is the dislocation arrangement on one-level amortization perforated plate 10 and the second grade amortization perforated plate 11, installs shrink tube 12 and blast pipe 13 thereafter.
The working principle is as follows: the high-speed tail gas air current of engine's exhaust flows into one-level aperture amortization intake pipe 2, because one-level aperture amortization intake pipe 2 right side is sealed, tail gas flows into second grade aperture amortization pipe 3 through one-level aperture amortization intake pipe 2 circumference aperture and flows through catalytic conversion part 6 after carrying out amortization water conservancy diversion processing, catalytic conversion part 6 can purify pollutants such as HC, CO in the engine exhaust, simultaneously with the NO conversion formation in the exhaust have the NO of strong oxidizing property2The purified tail gas flows into the catalytic particle trapping part 8 after flowing through the gap structure 7 and redistributing the airflow, the tail gas flows into the filter element inlet channels arranged at intervals, after the exhaust gas enters from the filter element inlet channels, because the inlet channels are blocked by the inlet channel plugs at the right side, and the outlet channels are blocked by the outlet channel plugs at the left side, the exhaust gas can only pass through the porous medium wall surfaces between the channels and flows out from the adjacent other channel, namely the filter element outlet channel, in the process, the particulate matters (soot) in the exhaust gas are deposited on the porous medium wall surfaces of the inlet channels serving as the filter materials, the trapping function of the particulate matters in the exhaust gas is realized, and meanwhile, the particulate matters and NO are subjected to the trapping function2The reaction occurs, the catalytic particle trapping part 8 is regenerated, and finally, the clean tail gas is silenced by the first-stage silencing perforated plate 10 and the second-stage silencing perforated plate 11 and then is discharged from the exhaust pipe 13.
The numerical simulation is carried out on an engine catalytic type particle trap model with a silencing and flow guiding device by using Fluent software, guidance can be provided for the structural optimization design, a figure 3 is a two-dimensional CFD simulation velocity vector distribution cloud picture of a central plane of the engine catalytic type particle trap with the silencing and flow guiding device, a figure 4 is a two-dimensional CFD simulation pressure distribution cloud picture of the central plane of the engine catalytic type particle trap with the silencing and flow guiding device, the layering of the flow velocity is less in the sepiolite carrier of a catalytic conversion part, most of fluid passes through the whole sepiolite carrier at a uniform flow velocity, and the novel silencing and flow guiding device can effectively adjust the flow direction and the flow velocity of the engine exhaust before entering the catalytic conversion part, improve the radial exhaust distribution and enable the fluid in the sepiolite carrier to flow integrally uniformly, the expected optimization effect is achieved.
Claims (2)
1. A catalytic particle trap of an engine with a silencing and flow guiding device is characterized by consisting of an air inlet flange (1), a first-stage small hole silencing air inlet pipe (2), a second-stage small hole silencing pipe (3), a shell (4), a damping layer (5) of a catalytic conversion part, a catalytic conversion part (6), a gap structure (7), a catalytic particle trapping part (8), a damping layer (9) of the catalytic particle trapping part, a first-stage silencing perforated plate (10), a second-stage silencing perforated plate (11), a contraction pipe (12), an exhaust pipe (13) and an exhaust flange (14); the pipe wall of the primary small-hole silencing air inlet pipe (2) in the shell (4) is provided with small holes, and the right side of the primary small-hole silencing air inlet pipe is in a closed state; the pipe wall and the right side of the second-stage small-hole silencing pipe (3) are both provided with small holes and are superposed with the axis of the first-stage small-hole silencing air inlet pipe (2); the secondary small hole silencing pipe (3) covers the periphery of the primary small hole silencing air inlet pipe (2), and the secondary small hole silencing pipe (3) is not connected with the primary small hole silencing air inlet pipe (2) in the axial direction;
the catalytic conversion part of the carrier is arranged in the radial and right areas of the secondary small-hole silencing pipe (3); the first-stage silencing perforated plate (10) and the second-stage silencing perforated plate (11) are provided with small holes which are arranged in a staggered manner; the gap structure (7) is arranged between the right side of the catalytic conversion part (6) and the left side of the catalytic type particle trapping part (8), and the axial length is 10-50 mm;
high-speed tail gas air current of exhaust of engine flows in one-level aperture amortization intake pipe (2), because one-level aperture amortization intake pipe (2) right side is sealed, tail gas flows in second grade aperture amortization pipe (3) via one-level aperture amortization intake pipe (2) circumference aperture and flows through catalytic conversion part (6) after carrying out amortization water conservancy diversion processing, catalytic conversion part (6) can be with the HC in the engine exhaust, the CO pollutant purifies, NO conversion formation in the exhaust simultaneously has strong oxidizing propertyNO2The purified tail gas flows into the catalytic particle trapping part (8) after flowing through the gap structure (7) and redistributing the airflow, the tail gas flows into the filter element inlet channels which are arranged at intervals respectively, after the exhaust gas enters from the filter element inlet channels, because the inlet channels are blocked by the inlet channel plugs at the right side, and the outlet channels are blocked by the outlet channel plugs at the left side, the exhaust gas can only pass through the porous medium wall surfaces between the channels and flows out from the other adjacent channel, namely the filter element outlet channel, in the process, the particles in the exhaust gas are deposited on the porous medium wall surfaces of the inlet channels which are used as filter materials, the trapping function of the particles in the exhaust gas is realized, and meanwhile, the particles and NO are mixed with the porous medium wall surfaces of the inlet channels2The reaction is carried out, the catalytic particle trapping part (8) is regenerated, and finally clean tail gas is exhausted from an exhaust pipe (13) after being silenced by a first-stage silencing perforated plate (10) and a second-stage silencing perforated plate (11).
2. The catalytic engine particulate trap of claim 1, wherein the particulate trap further comprises: the raw materials of the carriers of the catalytic conversion part (6) and the catalytic type particle trapping part (8) are sepiolite.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201911307605.4A CN111102037B (en) | 2019-12-18 | 2019-12-18 | Engine catalysis type particulate trap with amortization guiding device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201911307605.4A CN111102037B (en) | 2019-12-18 | 2019-12-18 | Engine catalysis type particulate trap with amortization guiding device |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN111102037A CN111102037A (en) | 2020-05-05 |
| CN111102037B true CN111102037B (en) | 2021-11-12 |
Family
ID=70421957
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201911307605.4A Active CN111102037B (en) | 2019-12-18 | 2019-12-18 | Engine catalysis type particulate trap with amortization guiding device |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN111102037B (en) |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112901312B (en) * | 2021-03-27 | 2022-03-11 | 扬州工业职业技术学院 | Diesel engine exhaust purification treatment device and method |
| CN113550811B (en) * | 2021-06-02 | 2022-05-20 | 内蒙古农业大学 | Diesel engine exhaust particulate matter trap and trapping method thereof |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1957161A (en) * | 2004-05-24 | 2007-05-02 | 日野自动车株式会社 | Exhaust gas purifier |
| CN104594993A (en) * | 2015-01-29 | 2015-05-06 | 合肥汇凌汽车零部件有限公司 | Silencer for internal combustion engine of light truck |
| CN108590825A (en) * | 2018-04-27 | 2018-09-28 | 湘潭大学 | A kind of engine catalytic converter with novel expanded pipe guiding device and sepiolite carrier |
| CN108625933A (en) * | 2018-06-25 | 2018-10-09 | 江阴市硕淳环保科技有限公司 | A kind of diesel particulate trap based on DOC and DPF |
| CN108979791A (en) * | 2016-06-08 | 2018-12-11 | 曹文东 | A kind of silencing means of automobile engine |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106499469A (en) * | 2015-09-06 | 2017-03-15 | 华玉娣 | Diesel exhaust filtration device |
-
2019
- 2019-12-18 CN CN201911307605.4A patent/CN111102037B/en active Active
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1957161A (en) * | 2004-05-24 | 2007-05-02 | 日野自动车株式会社 | Exhaust gas purifier |
| CN104594993A (en) * | 2015-01-29 | 2015-05-06 | 合肥汇凌汽车零部件有限公司 | Silencer for internal combustion engine of light truck |
| CN108979791A (en) * | 2016-06-08 | 2018-12-11 | 曹文东 | A kind of silencing means of automobile engine |
| CN108590825A (en) * | 2018-04-27 | 2018-09-28 | 湘潭大学 | A kind of engine catalytic converter with novel expanded pipe guiding device and sepiolite carrier |
| CN108625933A (en) * | 2018-06-25 | 2018-10-09 | 江阴市硕淳环保科技有限公司 | A kind of diesel particulate trap based on DOC and DPF |
Non-Patent Citations (1)
| Title |
|---|
| 海泡石纤维纸催化剂的制备及其碳烟催化燃烧性能研究;栾昌义;《中国优秀硕士学位论文全文数据库 工程科技Ⅰ辑》;20190315;第1-3页 * |
Also Published As
| Publication number | Publication date |
|---|---|
| CN111102037A (en) | 2020-05-05 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN111102037B (en) | Engine catalysis type particulate trap with amortization guiding device | |
| CN201284683Y (en) | Purification silencer for exhaust gas of diesel engine | |
| CN105888782A (en) | Compound purifying device for diesel engine tail gas | |
| CN201354668Y (en) | Engine tail gas purification muffler | |
| CN105134344A (en) | Catalyzing-cleaning-synchronous coupling device for diesel vehicle exhaust pollutants | |
| CN205330769U (en) | High rate of air hole particulate filter | |
| CN205477849U (en) | A device of making an uproar falls in combined type tail gas for diesel engine | |
| CN205559023U (en) | A combined type tail gas cleanup unit for diesel engine | |
| CN109184875A (en) | A kind of vent gas treatment exhaust apparatus | |
| CN208918658U (en) | A kind of silencer with waste gas purification function | |
| CN105736097A (en) | Diesel engine tail gas recovering and purifying and noise reducing composite device | |
| CN106321207A (en) | Engine exhaust device being convenient to maintain and engine | |
| CN105781689B (en) | Diesel engine vent gas compound noise-reducing device | |
| CN214221303U (en) | Catalyst for automobile exhaust | |
| JP2012067697A (en) | Exhaust emission control device | |
| CN210264859U (en) | Purifier is handled to generating set black cigarette | |
| CN210217875U (en) | Tail gas aftertreatment device and car | |
| CN211116195U (en) | Diesel engine tail gas treatment device | |
| CN103016122A (en) | Cylindrical post processor assembly | |
| CN205477848U (en) | A tail gas is retrieved purification and is fallen set composite of making an uproar for diesel engine | |
| CN201354667Y (en) | Engine tail gas purification muffler | |
| CN112431656A (en) | Catalyst carrier device | |
| CN203098009U (en) | Barrel-type postprocessor assembly | |
| CN213063711U (en) | Automobile purification silencer | |
| CN209025728U (en) | A kind of single cylinder diesel purifying muffler |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant |