CN115370451A - Rail locomotive discharges after-treatment system - Google Patents
Rail locomotive discharges after-treatment system Download PDFInfo
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- CN115370451A CN115370451A CN202211290141.2A CN202211290141A CN115370451A CN 115370451 A CN115370451 A CN 115370451A CN 202211290141 A CN202211290141 A CN 202211290141A CN 115370451 A CN115370451 A CN 115370451A
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- mixing
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- air outlet
- air inlet
- side faces
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- 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
- F01N3/2892—Exhaust flow directors or the like, e.g. upstream of catalytic device
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- 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
- F01N11/00—Monitoring or diagnostic devices for exhaust-gas treatment apparatus, e.g. for catalytic activity
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- 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
- F01N11/00—Monitoring or diagnostic devices for exhaust-gas treatment apparatus, e.g. for catalytic activity
- F01N11/002—Monitoring or diagnostic devices for exhaust-gas treatment apparatus, e.g. for catalytic activity the diagnostic devices measuring or estimating temperature or pressure in, or downstream of the exhaust apparatus
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- 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
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- 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]
- F01N3/208—Control of selective catalytic reduction [SCR], e.g. dosing of reducing agent
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- 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
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- 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
- F01N9/00—Electrical control of exhaust gas treating apparatus
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- 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
-
- 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
- Y02T—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
- Y02T10/00—Road transport of goods or passengers
- Y02T10/10—Internal combustion engine [ICE] based vehicles
- Y02T10/12—Improving ICE efficiencies
Abstract
The invention discloses a rail locomotive emission post-treatment system, which comprises: an air intake assembly; the flow guide assembly comprises a mixing pipe group, a sealing element connected with the mixing pipe group and the mixing chamber, an outer cover body covering the mixing pipe group and a bypass valve arranged on the outer cover body, wherein the mixing pipe group comprises an air inlet guide pipe, a plurality of cavity partition plates fixed on the outer wall of the air inlet guide pipe and extending to the inner wall of the outer cover body, flow guide hole uniform distribution areas formed at two side parts of the air inlet guide pipe and comprising a plurality of flow guide holes and turbulent flow holes arranged in the air inlet guide pipe, far away from the end part of the sealing element and positioned between the two flow guide hole uniform distribution areas; two sets of air outlet components; urea spraying assembly. The back pressure of the tail gas passing through the catalyst carrier can be effectively reduced.
Description
Technical Field
The invention belongs to the technical field of tail gas treatment, and relates to an aftertreatment system, in particular to an exhaust aftertreatment system of a rail locomotive.
Background
The Chinese patent with the application number of 202111643904.2 discloses a tail gas purification system for a fuel oil train, which comprises two exhaust units, wherein corrugated pipes are arranged at two ends of each exhaust unit, a gas control valve is installed on the corrugated pipe at one end in a butt joint mode, a gas outlet main pipeline is installed on the corrugated pipe at the other end in a butt joint mode, the two exhaust units are respectively arranged at two ends of the tail gas purification system for the fuel oil train and are in butt joint with exhaust pipes of an engine, the two exhaust units are in middle rotation symmetry, a main channel is installed between the gas control valve and the gas outlet main pipeline which respectively belong to the two exhaust units, and a starting channel is arranged between the gas control valve and the gas outlet main pipeline which both belong to one exhaust unit. Two exhaust units of this structure are well rotational symmetry, and the backpressure when tail gas passes through the carrier is great, is unfavorable for the emission of tail gas.
Disclosure of Invention
The present invention is directed to a rail vehicle exhaust aftertreatment system to solve the above problems.
In order to achieve the purpose, the invention provides the following technical scheme: a rail vehicle emissions after-treatment system comprising:
the air inlet assembly comprises a mixing chamber, two first air inlet pipelines, a first temperature sensor and a first nitrogen-oxygen sensor, wherein one end of each first air inlet pipeline is communicated with the mixing chamber and is symmetrically arranged, the first temperature sensor is arranged on the mixing chamber to measure the temperature in the mixing chamber, and the first nitrogen-oxygen sensor is arranged on the mixing chamber and is positioned on one side of the first temperature sensor; the free end of each first air inlet pipeline is provided with an air inlet, and the opening of the air inlet faces downwards;
the flow guide assembly comprises a mixing pipe group, a sealing element connected with the mixing pipe group and the mixing chamber, an outer cover body covering the mixing pipe group and a bypass valve arranged on the outer cover body, wherein the mixing pipe group comprises an air inlet guide pipe, a plurality of cavity partition plates which are fixed on the outer wall of the air inlet guide pipe and extend to the inner wall of the outer cover body, flow guide hole uniform distribution areas which are formed at the two sides of the air inlet guide pipe and comprise a plurality of flow guide holes, and turbulent flow holes which are arranged at the end part, far away from the sealing element, of the air inlet guide pipe and are positioned between the two flow guide hole uniform distribution areas, and the flow guide hole uniform distribution areas are separated by the cavity partition plates;
the two groups of air outlet assemblies are symmetrically arranged on two sides of the outer cover body; each set of the air outlet assembly comprises an air outlet shell communicated with the outer cover body, an SCR catalyst arranged in the air outlet shell and positioned outside the mixing pipe group, a DPF catalyst arranged in the air outlet shell and positioned outside the SCR catalyst, at least one air outlet chimney arranged on the outer side surface of the air outlet shell and provided with an air outlet, a first pressure difference sensor arranged on the air outlet shell and positioned at two sides of the SCR catalyst, an air outlet temperature sensor arranged on the air outlet shell and adjacent to the air outlet chimney, a second pressure difference sensor arranged on the air outlet shell and positioned at two sides of the DPF catalyst, and a second nitrogen-oxygen sensor arranged on the air outlet shell and positioned at the downstream of the SCR catalyst;
the urea spraying component comprises a urea solution spray gun arranged on the mixing chamber and an SCR urea box matched with the urea solution spray gun.
Optimally, it also comprises:
the switch board assembly, the switch board assembly at least with first temperature sensor, first nitrogen oxygen sensor, first differential pressure sensor, the temperature sensor of giving vent to anger, second differential pressure sensor and urea sprays the subassembly and is connected, is used for gathering first temperature sensor, first nitrogen oxygen sensor, first differential pressure sensor, the temperature sensor of giving vent to anger, second differential pressure sensor and second nitrogen oxygen sensor's information is right urea sprays the subassembly and controls.
Further, the mixing chamber comprises a mixing front section and a mixing rear section connected with the mixing front section;
the material mixing front section is surrounded by a front end face, two first side faces and two second side faces, the front end face is located between the two first air inlet pipelines, the two first side faces are respectively connected to two side edges of the front end face, the two second side faces are respectively connected to the upper side edge and the lower side edge of the front end face and are correspondingly connected with the two first side faces, and one end of each of the two first air inlet pipelines is installed to the corresponding first side face;
the mixing rear section is surrounded by a rear end face, two third side faces and two fourth side faces, the rear end face is arranged on one side of the mixing front section and is parallel to the front end face, the two third side faces are correspondingly connected with the side portions of the two first side faces and the rear end face, the two fourth side faces are correspondingly connected with the side portions of the two second side faces and the rear end face and are correspondingly connected with the two third side faces, and the area of the rear end face is larger than that of the front end face.
Furthermore, the included angle between the first side face and the front end face is 140 to 145 degrees.
Furthermore, the first temperature sensor and the first nitrogen-oxygen sensor are both arranged on the material mixing front section, and the urea solution spray gun is arranged on the material mixing rear section.
Further, the turbulation holes are formed on the surface of the air intake duct in an arc shape.
Further, the air outlet of the air outlet chimney is lower than the axis line of the air inlet guide pipe.
Further, the SCR catalyst and the DPF catalyst independently use a ceramic carrier having a square or circular shape.
Compared with the prior art, the invention has the beneficial effects that: according to the rail locomotive emission post-treatment system, the air inlet assembly, the flow guide assembly, the air outlet assembly and the like with specific structures are matched to obtain the non-shaped inner cavity, the air inlet high-pressure airflow is arranged in the middle to fully mix urea and tail gas, the high-efficiency catalyst carriers are arranged on the left side and the right side, the arrangement is compact, and the back pressure of the tail gas passing through the catalyst carriers can be effectively reduced.
Drawings
FIG. 1 is a schematic structural view of an exhaust after-treatment system for a railway locomotive according to the present invention;
FIG. 2 is a schematic diagram of a hybrid tube bank in the rail car exhaust after-treatment system of the present invention;
FIG. 3 is a schematic diagram of a mixing chamber in the rail car exhaust after-treatment system of the present invention;
FIG. 4 is a schematic diagram of a urea spray assembly in the rail vehicle exhaust after-treatment system of the present invention;
1. the mixing device comprises an air inlet assembly, 10, a first air inlet pipeline, 11, a mixing chamber, 12, a first temperature sensor, 13, a first nitrogen-oxygen sensor, 101, an air inlet, 110, a mixing front section, 111, a mixing rear section, 113, a third side face, 114, a first side face, 115, a fourth side face, 116 and a second side face;
2. the device comprises a flow guide assembly, 21, a mixing pipe group, 211, an air inlet guide pipe, 212, a cavity partition plate, 213, flow guide holes, 214, a turbulence hole, 22, an outer cover body, 23, a sealing element, 24 and a bypass valve;
3. an air outlet component 31, an air outlet shell 32, an SCR catalyst 33, a DPF catalyst 34, an air outlet chimney 35, a first differential pressure sensor 36, an air outlet temperature sensor 37, a second differential pressure sensor 38 and a second nitrogen oxide sensor;
41. urea solution spray gun 42, SCR urea case, 5, switch board assembly.
Detailed Description
The following detailed description will be given in connection with preferred embodiments of the present invention.
The rail locomotive exhaust aftertreatment system shown in fig. 1 to 3 mainly comprises an air inlet assembly 1, a flow guide assembly 2, an air outlet assembly 3, a urea spraying assembly and the like.
The air intake assembly 1 includes a mixing chamber 11, two first air intake pipelines 10, a first temperature sensor 12, a first nitrogen oxide sensor 13, and the like.
The mixing chamber 11 comprises a mixing front section 110 and a mixing rear section 111 connected with the mixing front section 110 (the mixing rear section 111 and the mixing front section 110 are hermetically connected); specifically, the mixing front section 110 is surrounded by a front end face 112, two first side faces 114 (namely, left and right side faces) and two second side faces 116 (namely, upper and lower side faces) (so that an included angle between the first side face 114 and the front end face 112 is 140 to 145 degrees, and an included angle between the second side faces 116 and the front end face 112 is 115 to 120 degrees), so that the front end face 112 is located between the two first air inlet pipelines 10, and one end of each of the two first air inlet pipelines 10 is installed on the corresponding first side face 114; in the present embodiment, the two first side surfaces 114 are respectively connected to two side edges (two left and right side edges) of the front end surface 112, and the two second side surfaces 116 are respectively connected to two upper and lower edges of the front end surface 112 and are correspondingly connected to the two first side surfaces 114. The mixing rear section 111 is defined by a rear end face (the area of the rear end face is larger than that of the front end face 112, preferably, the area of the rear end face is 1.5 to 2.0 times of that of the front end face 112), two third side faces 113 and two fourth side faces 115, the rear end face is arranged on one side (namely the rear side) of the mixing front section 110 and is parallel to the front end face 112, the two third side faces 113 are correspondingly connected with the edges of the two first side faces 114 and the rear end face, the two fourth side faces 115 are correspondingly connected with the edges of the two second side faces 116 and the rear end face and are correspondingly connected with the two third side faces 113, so that the mixing front section 110 and the mixing rear section 111 are defined as a hollow three-dimensional structure, and therefore, tail gas discharged by a rail locomotive is fully mixed with urea solution to improve the treatment efficiency of pollutants in the tail gas.
One end of the first inlet line 10 communicates with the mixing chamber 11 (i.e. is connected to the first side 114, the mixing chamber 11 having a vertically arranged symmetry plane), they being symmetrical with respect to the vertical symmetry plane of the mixing chamber 11. The free end of the first inlet line 10 has an inlet 101, so that the inlet 101 opens downwards. A first temperature sensor 12 is installed on the mixing chamber 11 to measure the temperature inside the mixing chamber 11; the first nitrogen-oxygen sensor is installed on the mixing chamber 11 and located at one side of the first temperature sensor 12, and is used for measuring the nitrogen-oxygen compound content in the mixing chamber 11. In the present embodiment, the first temperature sensor 12 and the first nitrogen oxide sensor 13 are installed on the front mixing section 110, and the urea solution spray gun 41 is installed on the rear mixing section 111. The two-in-one air inlet mode arranged in the above way obtains a two-in-one air inlet mixing cavity, and exhaust gas (namely tail gas discharged by a rail locomotive) discharged from the turbocharger can be introduced and fully merged.
The flow guiding assembly 2 mainly comprises a mixing tube group 21, an outer cover 22, a sealing element 23, a bypass valve 24 and the like. The mixing pipe group 21 includes an air inlet duct 211 (usually having a certain thickness, such as 2 to 5 mm), a plurality of cavity partition plates 212 (the cavity partition plates 212 are usually arranged at equal intervals, or may be arranged at unequal intervals as required) fixed on an outer wall of the air inlet duct 211 and extending to an inner wall of the outer cover 22, diversion hole distribution areas (namely two diversion hole distribution areas, which extend along an axial line direction of the air inlet duct 211 and are symmetrical with respect to the aforementioned symmetrical plane, and the two diversion hole distribution areas are arranged at intervals and are symmetrical with respect to the axial line of the air inlet duct 211) and a turbulent flow hole 214 (namely, the turbulent flow hole 214 is arranged on a peripheral surface of the air inlet duct 211 and is far away from the sealing element 23) arranged in the air inlet duct 211 and is arranged between the two diversion hole distribution areas, and the diversion hole distribution areas are separated by the cavity partition plates 212. In the present embodiment, the turbulating holes 214 are located between two guiding hole equispaced areas, so that the shape formed by the turbulating holes 214 on the surface of the air inlet duct 211 is an arc (specifically, a parabolic shape, which is beneficial to further ensure the smoothness of the exhaust gas flow). The sealing element 23 connects the mixing tube set 21 and the mixing chamber 11 to ensure the sealing between the mixing tube set 21 and the mixing chamber 1, and may be conventional (e.g. flange, etc.). The outer cover 22 covers the outside of the mixing tube group 21, so that an accommodating space is formed between the outer cover 22 and the intake duct 211. The bypass valve 24 is provided on the housing body 22 so as to communicate with the aforementioned accommodation space. By densely and uniformly arranging small holes (forming a uniform distribution area of the flow guide holes) on the air inlet guide pipe 211, not only can flow but also no great pressure difference is generated; the chamber divider 212 may function to direct the flow of inlet air (i.e., exhaust gas) evenly to each downstream aftertreatment support element. By arranging the emergency bypass valve structure, when an accident occurs, the bypass can be opened in time, and a waste gas passage is ensured, so that the normal operation of the locomotive internal combustion engine is ensured.
The air outlet members 3 are provided in two sets, which are symmetrically installed on both sides (i.e., left and right sides, also symmetrical about the aforementioned symmetry plane) of the outer cover 22. Each set of air outlet assembly 3 includes an air outlet housing 31 communicated with the outer cover 22, an SCR catalyst 32 installed in the air outlet housing 31 and located outside the mixing tube group 21, a DPF catalyst 33 installed in the air outlet housing 31 and located outside the SCR catalyst 32, at least one air outlet chimney 34 (the air outlet is laterally disposed) disposed on an outer side surface of the air outlet housing 31 and having an air outlet, a first differential pressure sensor 35 installed on the air outlet housing 31 and located at two sides of the SCR catalyst 32, an air outlet temperature sensor 36 installed on the air outlet housing 31 and located adjacent to the air outlet chimney 34, a second differential pressure sensor 37 installed on the air outlet housing 31 and located at two sides of the DPF catalyst 33, and a second nitrous oxide sensor 38 installed on the air outlet housing 31 and located downstream of the SCR catalyst 32. In the present embodiment, the SCR catalyst 32 and the DPF catalyst 33 independently use a square or round ceramic carrier to form a corresponding encapsulated carrier, which effectively reduces NO in the exhaust gas x And collecting PM (particulate matter) of the exhaust gas; the side exhaust chimney is arranged at the lateral sides of the two wings of the locomotive, the structure is simple, the special rainproof design is not needed, and the modification of the locomotive top cover on site is reduced. In this embodiment, the air outlet housing 31 extends obliquely downward from the outer cover 22, so that the air outlet of the air outlet chimney 34 is lower than the axial line of the air inlet duct 211, which is beneficial to reducing the pressure difference to make the tail gas sufficiently catalyzed by the catalyst to remove the pollutants.
The urea spraying component mainly comprises a urea solution spray gun 41 arranged on the mixing chamber 11 and an SCR urea box 42 matched with the urea solution spray gun 41; the specific structure can be seen in fig. 4.
In this embodiment, the control cabinet assembly 5 is connected to at least the first temperature sensor 12, the first nox sensor 13, the first differential pressure sensor 35, the exhaust gas temperature sensor 36, the second differential pressure sensor 37 and the urea spraying component, and is configured to collect information of the first temperature sensor 12, the first nox sensor 13, the first differential pressure sensor 35, the exhaust gas temperature sensor 36 and the second differential pressure sensor 37 and control the urea spraying component (see fig. 4), that is, the control cabinet assembly 5 may obtain information of the first temperature sensor 12, the first nox sensor 13, the first differential pressure sensor 35, the exhaust gas temperature sensor 36, the second differential pressure sensor 37 and the second nox sensor 38 through an existing communication method, and perform data processing on the information, so as to adjust an ejection amount of the urea solution to ensure an exhaust gas quality, thereby improving an automation degree.
The above embodiments are only for illustrating the technical idea and features of the present invention, and the purpose of the present invention is to enable those skilled in the art to understand the content of the present invention and implement the present invention, and not to limit the protection scope of the present invention by this means. All equivalent changes and modifications made according to the spirit of the present invention should be covered within the protection scope of the present invention.
Claims (8)
1. A rail vehicle exhaust after-treatment system, comprising:
the air inlet assembly (1) comprises a mixing chamber (11), two first air inlet pipelines (10) with one ends communicated with the mixing chamber (11) and symmetrically arranged, a first temperature sensor (12) installed on the mixing chamber (11) for measuring the temperature in the mixing chamber, and a first nitrogen-oxygen sensor (13) installed on the mixing chamber (11) and located on one side of the first temperature sensor (12); the free end of each first air inlet pipeline (10) is provided with an air inlet (101), and the opening of the air inlet (101) faces downwards;
the flow guide assembly (2) comprises a mixing pipe group (21), a sealing element (23) connected with the mixing pipe group (21) and the mixing chamber (11), an outer cover body (22) covering the mixing pipe group (21) and a bypass valve (24) arranged on the outer cover body (22), wherein the mixing pipe group (21) comprises an air inlet guide pipe (211), a plurality of cavity partition plates (212) fixed on the outer wall of the air inlet guide pipe (211) and extending to the inner wall of the outer cover body (22), flow guide hole distribution areas formed at two side parts of the air inlet guide pipe (211) and comprising a plurality of flow guide holes (213) and turbulent flow holes (214) arranged in the air inlet guide pipe (211) and far away from the end part of the sealing element (23) and positioned between the two flow guide hole distribution areas, and the flow guide hole distribution areas are separated by the cavity partition plates (212);
the two groups of air outlet assemblies (3) are symmetrically arranged on two sides of the outer cover body (22); each set of the air outlet components (3) comprises an air outlet shell (31) communicated with the outer cover body (22), an SCR catalyst (32) installed in the air outlet shell (31) and positioned outside the mixing pipe group (21), a DPF catalyst (33) installed in the air outlet shell (31) and positioned outside the SCR catalyst (32), at least one air outlet chimney (34) arranged on the outer side surface of the air outlet shell (31) and provided with an air outlet, a first pressure difference sensor (35) installed on the air outlet shell (31) and positioned on two sides of the SCR catalyst (32), an air outlet temperature sensor (36) installed on the air outlet shell (31) and adjacent to the air outlet chimney (34), a second pressure difference sensor (37) installed on the air outlet shell (31) and positioned on two sides of the DPF catalyst (33), and a second nitrogen oxide sensor (38) installed on the shell (31) and positioned on the downstream of the SCR catalyst (32);
the urea spraying assembly comprises a urea solution spray gun (41) arranged on the mixing chamber (11) and an external urea tank (42) matched with the urea solution spray gun (41).
2. The rail locomotive exhaust after-treatment system of claim 1, further comprising:
control cabinet assembly (5), control cabinet assembly (5) at least with first temperature sensor (12), first nitrogen oxygen sensor (13), first pressure differential sensor (35), temperature sensor (36), the second pressure differential sensor (37) of giving vent to anger and urea spray assembly and be connected, be used for gathering first temperature sensor (12), first nitrogen oxygen sensor (13), first pressure differential sensor (35), temperature sensor (36), the second pressure differential sensor (37) of giving vent to anger and the information of second nitrogen oxygen sensor (38) and right urea spray assembly controls.
3. The rail locomotive exhaust after-treatment system of claim 1 or 2, wherein: the mixing chamber (11) comprises a mixing front section (110) and a mixing rear section (111) connected with the mixing front section (110);
the mixing front section (110) is surrounded by a front end face (112), two first side faces (114) and two second side faces (116), the front end face (112) is located between the two first air inlet pipelines (10), the two first side faces (114) are respectively connected to two side edges of the front end face (112), the two second side faces (116) are respectively connected to the upper side edge and the lower side edge of the front end face (112) and correspondingly connected with the two first side faces (114), and one end of each of the two first air inlet pipelines (10) is installed on the corresponding first side face (114);
the mixing rear section (111) is surrounded by a rear end face, two third side faces (113) and two fourth side faces (115), the rear end face is arranged on one side of the mixing front section (110) and is parallel to the front end face (112), the two third side faces (113) are correspondingly connected with the two first side faces (114) and the side portions of the rear end face, the two fourth side faces (115) are correspondingly connected with the two second side faces (116) and the side portions of the rear end face and are correspondingly connected with the two third side faces (113), and the area of the rear end face is larger than that of the front end face (112).
4. The rail locomotive exhaust after-treatment system of claim 3, wherein: an included angle between the first side face (114) and the front end face (112) is 140 to 145 degrees, and the area of the rear end face is 1.5 to 2.0 times of the area of the front end face (112).
5. The rail locomotive exhaust after-treatment system of claim 3, wherein: the first temperature sensor (12) and the first nitrogen-oxygen sensor (13) are installed on the material mixing front section (110), and the urea solution spray gun (41) is installed on the material mixing rear section (111).
6. The rail locomotive exhaust after-treatment system of claim 1 or 2, wherein: the turbulation holes (214) are formed on the surface of the intake duct (211) in an arc shape.
7. The rail locomotive exhaust after-treatment system of claim 1 or 2, wherein: the air outlet of the air outlet chimney (34) is lower than the axial lead of the air inlet guide pipe (211).
8. The rail locomotive exhaust after-treatment system of claim 1 or 2, wherein: the SCR catalyst (32) and the DPF catalyst (33) are each independently a square or circular ceramic carrier.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202211290141.2A CN115370451B (en) | 2022-10-21 | 2022-10-21 | Rail locomotive discharges after treatment system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202211290141.2A CN115370451B (en) | 2022-10-21 | 2022-10-21 | Rail locomotive discharges after treatment system |
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Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE102009036511A1 (en) * | 2009-08-07 | 2011-02-10 | Friedrich Boysen Gmbh & Co. Kg | Exhaust system for e.g. diesel engine, has waste gas duct provided between input and exhaust gas treatment devices, and including deflection device for partial feedback of exhaust gas flow against main exhaust gas flow direction |
| CN206016920U (en) * | 2016-08-30 | 2017-03-15 | 无锡威孚力达催化净化器有限责任公司 | Urea injection mixed cell for diesel engine vent gas post processing |
| CN107269361A (en) * | 2016-03-31 | 2017-10-20 | 曼柴油机和涡轮机欧洲股份公司 | Discharge gas aftertreatment system, internal combustion engine and the method for operating it |
| CN107514305A (en) * | 2016-06-15 | 2017-12-26 | 天纳克（苏州）排放系统有限公司 | Tail-gas after treatment apparatus |
| CN112177722A (en) * | 2020-11-16 | 2021-01-05 | 天纳克（苏州）排放系统有限公司 | Mixer assembly and exhaust aftertreatment package |
| CN112324540A (en) * | 2020-09-28 | 2021-02-05 | 秦克红 | Cylinder SCR catalytic converter |
| CN217300689U (en) * | 2022-05-12 | 2022-08-26 | 中自环保科技股份有限公司 | Diesel engine tail gas aftertreatment system |
-
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- 2022-10-21 CN CN202211290141.2A patent/CN115370451B/en active Active
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE102009036511A1 (en) * | 2009-08-07 | 2011-02-10 | Friedrich Boysen Gmbh & Co. Kg | Exhaust system for e.g. diesel engine, has waste gas duct provided between input and exhaust gas treatment devices, and including deflection device for partial feedback of exhaust gas flow against main exhaust gas flow direction |
| CN107269361A (en) * | 2016-03-31 | 2017-10-20 | 曼柴油机和涡轮机欧洲股份公司 | Discharge gas aftertreatment system, internal combustion engine and the method for operating it |
| CN107514305A (en) * | 2016-06-15 | 2017-12-26 | 天纳克（苏州）排放系统有限公司 | Tail-gas after treatment apparatus |
| CN206016920U (en) * | 2016-08-30 | 2017-03-15 | 无锡威孚力达催化净化器有限责任公司 | Urea injection mixed cell for diesel engine vent gas post processing |
| CN112324540A (en) * | 2020-09-28 | 2021-02-05 | 秦克红 | Cylinder SCR catalytic converter |
| CN112177722A (en) * | 2020-11-16 | 2021-01-05 | 天纳克（苏州）排放系统有限公司 | Mixer assembly and exhaust aftertreatment package |
| CN217300689U (en) * | 2022-05-12 | 2022-08-26 | 中自环保科技股份有限公司 | Diesel engine tail gas aftertreatment system |
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| CN115370451B (en) | 2023-01-17 |
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