WO2019075877A1 - 一种通用化集成式doc-dpf-scr后处理装置 - Google Patents

一种通用化集成式doc-dpf-scr后处理装置 Download PDF

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Publication number
WO2019075877A1
WO2019075877A1 PCT/CN2017/114958 CN2017114958W WO2019075877A1 WO 2019075877 A1 WO2019075877 A1 WO 2019075877A1 CN 2017114958 W CN2017114958 W CN 2017114958W WO 2019075877 A1 WO2019075877 A1 WO 2019075877A1
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WO
WIPO (PCT)
Prior art keywords
scr
dpf
doc
unit
urea
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Application number
PCT/CN2017/114958
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English (en)
French (fr)
Inventor
刘兴龙
高伟
王东升
王意宝
王奉双
Original Assignee
潍柴动力股份有限公司
潍柴动力空气净化科技有限公司
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Application filed by 潍柴动力股份有限公司, 潍柴动力空气净化科技有限公司 filed Critical 潍柴动力股份有限公司
Priority to RU2020114439A priority Critical patent/RU2744309C1/ru
Priority to SG11202002548QA priority patent/SG11202002548QA/en
Priority to EP17929391.5A priority patent/EP3699407B1/en
Priority to RS20220371A priority patent/RS63142B1/sr
Publication of WO2019075877A1 publication Critical patent/WO2019075877A1/zh

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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
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60K—ARRANGEMENT OR MOUNTING OF PROPULSION UNITS OR OF TRANSMISSIONS IN VEHICLES; ARRANGEMENT OR MOUNTING OF PLURAL DIVERSE PRIME-MOVERS IN VEHICLES; AUXILIARY DRIVES FOR VEHICLES; INSTRUMENTATION OR DASHBOARDS FOR VEHICLES; ARRANGEMENTS IN CONNECTION WITH COOLING, AIR INTAKE, GAS EXHAUST OR FUEL SUPPLY OF PROPULSION UNITS IN VEHICLES
    • B60K13/00—Arrangement in connection with combustion air intake or gas exhaust of propulsion units
    • B60K13/04—Arrangement in connection with combustion air intake or gas exhaust of propulsion units concerning exhaust
    • 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
    • F01N13/009—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 having two or more separate purifying devices arranged in series
    • 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
    • F01N13/009—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 having two or more separate purifying devices arranged in series
    • F01N13/0097—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 having two or more separate purifying devices arranged in series the purifying devices are arranged in a single housing
    • 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
    • F01N13/011—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 having two or more purifying devices arranged in parallel
    • F01N13/017—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 having two or more purifying devices arranged in parallel the purifying devices are arranged in a single housing
    • 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
    • F01N13/10—Other arrangements or adaptations of exhaust conduits of exhaust manifolds
    • F01N13/105—Other arrangements or adaptations of exhaust conduits of exhaust manifolds having the form of a chamber directly connected to the cylinder head, e.g. without having tubes connected between cylinder head and chamber
    • 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
    • F01N13/18—Construction facilitating manufacture, assembly, or disassembly
    • F01N13/1888—Construction facilitating manufacture, assembly, or disassembly the housing of the assembly consisting of two or more parts, e.g. two half-shells
    • 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
    • F01N3/103—Oxidation catalysts for HC and CO only
    • 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]
    • 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
    • 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
    • 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
    • F01N2230/00—Combination of silencers and other devices
    • F01N2230/02—Exhaust 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
    • F01N2230/00—Combination of silencers and other devices
    • F01N2230/04—Catalytic converters
    • 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
    • F01N2240/00—Combination or association of two or more different exhaust treating devices, or of at least one such device with an auxiliary device, not covered by indexing codes F01N2230/00 or F01N2250/00, one of the devices being
    • F01N2240/20—Combination or association of two or more different exhaust treating devices, or of at least one such device with an auxiliary device, not covered by indexing codes F01N2230/00 or F01N2250/00, one of the devices being a flow director or deflector
    • 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
    • F01N2340/00—Dimensional characteristics of the exhaust system, e.g. length, diameter or volume of the apparatus; Spatial arrangements of exhaust apparatuses
    • F01N2340/02—Dimensional characteristics of the exhaust system, e.g. length, diameter or volume of the apparatus; Spatial arrangements of exhaust apparatuses characterised by the distance of the apparatus to the engine, or the distance between two exhaust treating apparatuses
    • 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
    • F01N2470/00—Structure or shape of gas passages, pipes or tubes
    • F01N2470/14—Plurality of outlet tubes, e.g. in parallel or with different length

Definitions

  • the invention relates to the technical field of diesel vehicle exhaust gas treatment, in particular to a generalized integrated DOC-DPF-SCR post-processing device.
  • the existing box-type aftertreatment device realizes an integrated arrangement of DOC-DPF, SCR, and urea mixers.
  • DOC and DPF are connected in series to form DOC-DPF;
  • SCR is arranged side by side in the same side of the casing, which reduces the length dimension of the aftertreatment device;
  • DOC-DPF, two-way SCR, urea mixer and row The air pipes are arranged in parallel in the casing, and the ends of the casings are connected to each other through the end caps at both ends of the casing.
  • the exhaust gas enters the DOC-DPF unit from the intake port of the aftertreatment device to complete oxidation catalysis and particle trapping.
  • the gas flow enters the urea mixer through the end cover, while the urea mixer sprays urea, and the urea spray and the exhaust gas are evenly distributed. Mixing; the mixed gas mixture is discharged from the urea mixer and then enters the two SCRs through the other end cover to complete the catalytic conversion of nitrogen oxides (NO X ). Finally, the exhaust gas exits the SCR and is discharged through the exhaust tail pipe. gas.
  • the layout structure of the box type post-processing device requires that the matching size of the whole vehicle is reserved in the width and height directions, and it is difficult to meet more supporting requirements; usually, for convenience DPF maintenance, after the box type after-treatment device is assembled on the whole vehicle, it needs to be The DPF is located above the outside, and the box aftertreatment device can only be assembled on the right side of the vehicle for this purpose, and the left side arrangement cannot be achieved.
  • the present invention provides the following technical solutions:
  • a generalized integrated DOC-DPF-SCR aftertreatment device comprising a tank, a DOC-DPF unit, two SCR units, one or two urea mixers and an exhaust pipe;
  • the box has a square cross section
  • the DOC-DPF unit and the exhaust pipe are respectively disposed at two corners of a set of diagonals of a square; pairs of the two SCR units with respect to the DOC-DPF unit and the exhaust pipe An angularly symmetric arrangement;
  • the urea mixer is symmetrically arranged with respect to a diagonal line where the DOC-DPF unit and the exhaust pipe are located; and the exhaust gas in the DOC-DPF unit is discharged into the urea mixer;
  • the mixed exhaust gas in the urea mixer is discharged into the SCR unit, and the exhaust gas in the SCR unit is discharged into the exhaust pipe.
  • the number of the urea mixers is one, and the outlet of the urea mixer is diverted through a second lands located at the front end of the tank Two inlets of the two SCR units are connected.
  • the number of the urea mixers is one, and the two SCR units are a first SCR unit and a second SCR unit, respectively, the urea mixture
  • the outlet of the device is in communication with the first SCR unit via a second lands located at the front end of the case, the outlet of the first SCR unit passing through a third lands located at the rear end of the case and the second SCR
  • the inlets of the units are connected in series.
  • the number of the urea mixers is two, and the outlet of the DOC-DPF unit passes through the first end located at the rear end of the tank a connecting plate is connected to the inlets of the two urea mixers, and the outlets of the two urea mixers are respectively passed through two second connecting plates at the front end of the box and the inlets of the two SCR units. Correspondingly connected.
  • the housing is provided with a heat insulating structure.
  • the heat insulating structure is an insulating cotton.
  • the SCR unit and the side of the casing on which the exhaust pipe is located are provided with mounting brackets for mounting on the frame.
  • the front end cover of the casing is provided with an intake pipe assembly, and an intake port of the intake pipe assembly faces the front end of the front end cover , above or to the side.
  • the exhaust port of the exhaust pipe is located at a front end cover of the case, a rear end cover of the case, and the case The bottom wall of the body or the side wall of the case.
  • the tank is further provided with a sensor and a urea nozzle.
  • the box body has a square cross section, and the DOC-DPF unit and the exhaust pipe are respectively arranged on a pair of diagonal corners of the square, two The SCR units are symmetrically arranged with respect to the diagonal line where the DOC-DPF unit and the exhaust pipe are located; the urea mixer is symmetrically arranged with respect to the diagonal line where the DOC-DPF unit and the exhaust pipe are located; the exhaust gas in the DOC-DPF unit is discharged after entering The urea mixer; the mixed exhaust gas in the urea mixer is discharged into the SCR unit, and the exhaust gas in the SCR unit is discharged into the exhaust pipe.
  • the casing of the generalized integrated DOC-DPF-SCR aftertreatment device of the present application has a square cross section, and the DOC-DPF unit and the exhaust pipe inside the casing are respectively arranged in a square of a pair of diagonal two At each corner, the two SCR units are symmetrically arranged with respect to the diagonal of the DOC-DPF unit and the exhaust pipe; the urea mixer is symmetrically arranged with respect to the diagonal of the DOC-DPF unit and the exhaust pipe. Therefore, after the generalized integrated DOC-DPF-SCR
  • the processing device can facilitate the later interchange of each functional unit, and the left and right side arrangement of the box body and the flexible and diverse arrangement of the intake and exhaust modes, thereby realizing the universal supporting installation on different complete vehicles.
  • FIG. 1 is a schematic diagram showing the internal layout structure of a generalized integrated DOC-DPF-SCR post-processing device according to an embodiment of the present invention
  • FIG. 2 is a schematic structural diagram of a generalized integrated DOC-DPF-SCR post-processing apparatus according to an embodiment of the present invention
  • FIG. 3 is a schematic diagram of an explosion structure of a generalized integrated DOC-DPF-SCR post-processing device according to an embodiment of the present invention
  • FIG. 4 is a schematic diagram showing the arrangement of a generalized integrated DOC-DPF-SCR post-processing device installed on the right side of the frame according to an embodiment of the present invention
  • FIG. 5 is a schematic diagram of a generalized integrated DOC-DPF-SCR post-processing device installed on the left side of the frame according to an embodiment of the present invention
  • FIG. 6 is a schematic diagram showing the arrangement of an intake pipe assembly of a generalized integrated DOC-DPF-SCR post-processing device according to an embodiment of the present invention
  • FIG. 7 is a schematic diagram showing the arrangement of an exhaust pipe of a generalized integrated DOC-DPF-SCR post-processing device according to an embodiment of the present invention.
  • FIG. 8 is a schematic diagram of an assembly structure of a generalized integrated DOC-DPF-SCR post-processing device according to an embodiment of the present invention.
  • 1 is a box
  • 11 is a front end cover
  • 12 is a rear end heat shield
  • 13 is a rear end cover
  • 2 is an SCR unit
  • 3 is an exhaust pipe
  • 31 is an exhaust port
  • 4 is a urea mixer
  • 5 The DOC-DPF unit
  • 51 is the DOC unit
  • 52 is the DPF unit
  • 6 is the intake pipe assembly
  • 7 is the second lands
  • 8 is the first lands
  • 9 is the mounting bracket
  • A is the differential pressure sensor
  • B is the nitrogen Oxygen sensor electronic integrated unit
  • C Urea nozzle D is a nitrogen oxide sensor probe
  • E is a temperature sensor.
  • the core of the invention is to provide a generalized integrated DOC-DPF-SCR post-processing device, which realizes universal installation on different vehicles.
  • an embodiment of the present invention provides a generalized integrated DOC-DPF-SCR post-processing device, including a box 1, a DOC-DPF unit 5, two SCR units 2, one or two. Urea mixer 4 and exhaust pipe 3.
  • the DOC-DPF unit 5, the SCR unit 2, the urea mixer 4, and the exhaust pipe 3 are all disposed in the casing 1, and the casing 1 includes a front end cover 11, a rear end cover 13, and a peripheral wall.
  • the DOC-DPF unit 5 is configured by connecting the DOC unit 51 and the DPF unit 52 by a clamp, respectively performing oxidation catalysis of the exhaust gas and particle collection of the PM, and the DOC-DPF unit 5 is connected to the intake pipe assembly 6 on the front end cover 11;
  • the cross section of the casing 1 is square, that is, the cross section parallel to the front end cover 11 and the rear end cover 13 is square;
  • the DOC-DPF unit 5 and the exhaust pipe 3 are respectively arranged on a pair of diagonal corners of a square;
  • the two SCR units 2 are arranged symmetrically with respect to the diagonal of the DOC-DPF unit 5 and the exhaust pipe 3, preferably symmetrically arranged at two opposite corners of the square;
  • the urea mixer 4 is opposed to the DOC-DPF unit 5 and the diagonal line of the exhaust pipe 3 is symmetrically arranged;
  • the exhaust gas in the DOC-DPF unit 5 is discharged into the urea mixer 4;
  • the generalized integrated DOC-DPF-SCR post-processing device operates as follows: exhaust gas enters the DOC-DPF unit 5 via the intake pipe assembly 6, and oxidation catalysis of the exhaust gas and particulate trapping of the PM are performed in the DOC-DPF unit 5, respectively. Thereafter, the exhaust gas enters the urea mixer 4 while simultaneously injecting urea into the urea mixer 4, and the exhaust gas and urea are uniformly mixed in the urea mixer 4, after which the exhaust gas mixture enters the SCR unit 2 for catalytic conversion of nitrogen oxides. Finally, the exhaust gas comes out of the SCR unit 2, It is discharged through the exhaust pipe 3.
  • the casing 1 of the generalized integrated DOC-DPF-SCR aftertreatment device of the present application has a square cross section, and the DOC-DPF unit 5 and the exhaust pipe 3 inside the casing 1 are respectively arranged in a square group
  • the two SCR units 2 are arranged symmetrically with respect to the diagonal of the DOC-DPF unit 5 and the exhaust pipe 3; the pair of the urea mixer 4 relative to the DOC-DPF unit 5 and the exhaust pipe 3
  • the angle lines are arranged symmetrically.
  • the generalized integrated DOC-DPF-SCR post-processing device can facilitate the later interchange of each functional unit; and in order to facilitate the maintenance of the DOC-DPF unit 5, the DOC-DPF unit 5 is located above the outer side of the frame,
  • the universal integrated DOC-DPF-SCR post-processing unit can be mounted on the left or right side of the frame, and only needs to adjust the angle of the general-purpose integrated DOC-DPF-SCR post-processing device, due to the cabinet 1 It is a square. Therefore, after the conversion angle is set, it is not limited by the installation space. As shown in Figure 5, Figure 5 shows the situation on the left side of the frame, and Figure 4 shows the situation on the right side of the frame. This arrangement is adopted. Therefore, the intake and exhaust modes of the general-purpose integrated DOC-DPF-SCR after-treatment device can be flexibly and versatilely arranged according to the assembly requirements of different vehicles, and the common use on different vehicles is realized. Supporting installation.
  • the present embodiment provides a specific arrangement of the SCR unit 2 and the urea mixer 4 for the structure in which the SCR unit 2 and the urea mixer 4 are symmetrically arranged with respect to the diagonal of the DOC-DPF unit 5 and the exhaust pipe 3, respectively. form. As shown in FIG. 2 and FIG.
  • the two SCR units 2 are symmetrically arranged on two corners of a square of a square of the casing 1, the number of the urea mixers 4 is one, and the urea mixer 4 is arranged at
  • the DOC-DPF unit 5 and the exhaust pipe 3 are located on the diagonal line between the DOC-DPF unit 5 and the exhaust pipe 3; the outlet of the DOC-DPF unit 5 passes through the first land located at the rear end of the casing 1 8 is in communication with the inlet of the urea mixer 4, the outlet of the urea mixer 4 is branched and connected to the two inlets of the two SCR units 2 through the second lands 7 at the front end of the tank 1, the outlets and exhausts of the two SCR units 2 Tube 3 is connected.
  • the second lands 7 have the function of splitting, having one inlet and two outlets, the inlet being in communication with the outlet of the urea mixer 4, the two outlets being in communication with the inlets of the two SCR units 2, respectively.
  • This embodiment provides an arrangement of another specific SCR unit 2 and urea mixer 4, wherein the number of urea mixers 4 is one, and the urea mixer 4 is arranged in the DOC-DPF unit 5 and The exhaust pipe 3 is located on the diagonal line between the DOC-DPF unit 5 and the exhaust pipe 3; the two SCR units 2 are the first SCR unit and the second SCR unit, respectively, the first SCR unit and the second The SCR units are respectively disposed at a pair of diagonal corners of a square of the casing 1; the outlet of the DOC-DPF unit 5 communicates with the inlet of the urea mixer 4 through the first lands 8 at the rear end of the tank 1, urea The outlet of the mixer 4 communicates with the inlet of the first SCR unit through a second lands 7 located at the front end of the casing 1, the outlet of the first SCR unit passing through the third lands located at the rear end of the casing 1 and the inlet of the second SCR unit Connected in series, the outlet of the second SCR
  • the second lands 7 have an inlet and an outlet for achieving a single communication of the urea mixer 4 and the first SCR unit, the third lands having an inlet and an outlet for achieving a single communication of the first SCR unit and the second SCR unit.
  • This embodiment provides an arrangement of a third specific SCR unit 2 and urea mixer 4, wherein the number of urea mixers 4 is two, and the two urea mixers 4 are opposed to the DOC-DPF unit 5 and the exhaust pipe.
  • the diagonals of the 3 are symmetrically arranged and are located between the DOC-DPF unit 5 and the exhaust pipe 3.
  • the outlet of the DOC-DPF unit 5 is branched and connected to the inlets of the two urea mixers 4 through a first lands 8 located at the rear end of the tank 1, and the outlets of the two urea mixers 4 pass through two second ends located at the front end of the tank 1, respectively.
  • the land 8 is in one-to-one correspondence with the inlets of the two SCR units 2.
  • the exhaust gas is branched into two paths after exiting from the DOC-DPF unit 5, and is separately introduced into the two urea mixers 4, and respectively mixed, and the exhaust gas mixture from each of the urea mixers 4 is correspondingly entered into one SCR unit 2, respectively.
  • the first lands 8 have an inlet and two outlets, which have a splitting effect.
  • the second lands 7 are two in number, each having an inlet and an outlet, and a single urea mixer 4 and an SCR unit 2 are separately connected.
  • the arrangement of the above three kinds of the urea mixer 4 and the SCR unit 2 is a structure which is symmetrically arranged, and therefore, the left and right side arrangement of the casing 1 can be realized.
  • the housing 1 is provided with a heat insulating structure for thermal protection of the generalized integrated DOC-DPF-SCR post-processing device.
  • the front end cover 11 of the casing 1 and the inner member of the casing 1 are provided with heat insulating cotton.
  • An insulating cotton is disposed between the rear end cover 13 of the casing 1 and the rear end heat shield 12 of the casing 1.
  • the surrounding wall of the box body 1 has a double-layer structure, and the double-layer structure is provided with heat insulating cotton.
  • each unit in the casing 1 can also be insulated by providing a double-layer structure and an insulating cotton. The temperature of the surface of the aftertreatment device is effectively reduced by the multi-layer insulation protection.
  • the side of the casing 1 where the SCR unit 2 and the exhaust pipe 3 are located is provided with a mounting bracket 9 for mounting on the frame. Since the number of the SCR units 2 is two and is symmetrically arranged with respect to the diagonal line where the DOC-DPF unit 5 and the exhaust pipe 3 are located, the mounting bracket 9 is disposed at two positions on the casing 1, and two The setting position is symmetrically arranged with respect to the diagonal of the DOC-DPF unit 5 and the exhaust pipe 3, and the two mounting brackets can realize the installation of the cabinet on the left and right sides of the frame, while ensuring that the DOC-DPF unit 5 is located on the frame. Upper side for easy maintenance.
  • the front end cover 11 of the casing 1 is provided with an intake pipe assembly 6, and the intake port of the intake pipe assembly 6 faces the front, the upper side or the side of the front end cover 11.
  • the front end cover 11 is punched at different positions, and the intake pipe assembly 6 is directly arranged on the front end cover 11 to realize the matching requirements of various intake modes such as front intake, side intake, and upper intake, and is suitable for different vehicles. Assembly arrangement. At the same time, only the scheme of punching and arranging the intake pipe assembly 6 at different positions on the front end cover 11 shares a front end cover 11, which effectively reduces the cost of opening the mold.
  • the exhaust port 31 of the exhaust pipe 3 is located at the front end cover 11 of the casing 1, the rear end cover 13 of the casing 1, the bottom wall of the casing 1, or the casing 1.
  • the outlet of the SCR unit 2 is usually located at the rear end of the tank 1, and therefore, the inlet of the exhaust pipe 3 is located at the rear end of the tank 1.
  • the exhaust pipe 3 When the exhaust port 31 of the exhaust pipe 3 is located on the front end cover 11, the exhaust pipe 3 is a long straight pipe penetrating the front end cover 11, and when the exhaust port 31 of the exhaust pipe 3 is located on the rear end cover 13, The exhaust pipe 3 is a short straight pipe that penetrates the rear end cover 13; when the exhaust port 31 of the exhaust pipe 3 is located on the bottom wall or the side wall of the casing 1, the exhaust pipe 3 can be bent downward. Bend pipe or bent pipe bent to the left and right sides, or open a vertical downward or left and right branch pipe on the straight pipe.
  • the exhaust pipe 3 may be connected by a flange or a plurality of connection structures such as a plug-in type. The diversity of the air outlet mode effectively broadens the supporting field of the product and is suitable for different vehicle assembly.
  • the casing 1 is further provided with a sensor and a urea nozzle C.
  • the sensor is a sensor corresponding to each functional unit, such as a differential pressure sensor A, a nitrogen-oxygen sensor probe D, a nitrogen-oxygen sensor electronic integrated unit B, a temperature sensor E, a sensor of each functional unit and a urea nozzle C are integrated on the casing 1 together, Achieving assembly supply reduces assembly complexity. Integrated assembly It is convenient to install and support, and it is also beneficial to increase the temperature of each catalytic unit, improve the conversion efficiency of each functional unit, and effectively reduce the emission of exhaust pollutants.

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Abstract

一种通用化集成式DOC-DPF-SCR后处理装置，包括箱体（1）、DOC-DPF单元（5）、两个SCR单元（2）、一个或两个尿素混合器（4）和排气管（3）；箱体（1）的横截面为正方形，DOC-DPF单元（5）和排气管（3）分别布置于正方形的一组对角的两个角上；两个SCR单元（2）和尿素混合器（4）均相对DOC-DPF单元（5）和排气管（3）所在的对角线对称布置；DOC-DPF单元(5)中的废气排出后进入尿素混合器（4）；尿素混合器（4）中的混合废气排出后进入SCR单元（2），SCR单元（2）中的废气排入排气管（3），本通用化集成式DOC-DPF-SCR后处理装置可以方便各功能单元后期的互换，以及箱体（1）的左右侧布置和进气和排气方式的灵活多样性布置，实现了在不同整车上的通用配套安装。

Description

一种通用化集成式DOC-DPF-SCR后处理装置
本申请要求于2017年10月18日提交中国专利局、申请号为201710971629.4、发明名称为“一种通用化集成式DOC-DPF-SCR后处理装置”的中国专利申请的优先权，其全部内容通过引用结合在本申请中。
技术领域
本发明涉及柴油车尾气处理技术领域，特别涉及一种通用化集成式DOC-DPF-SCR后处理装置。
背景技术
随着国家柴油车尾气污染物排放标准越来越严格，为了满足欧VI和国VI排放标准，需要对排气污染物中的颗粒物、NOX(氮氧化物)、HC(碳氢化合物)和CO(一氧化碳)等含量进行控制，因此，需要将DOC(氧化催化转换器)、DPF(颗粒捕集器)和SCR(选择性催化还原转化器)集成在箱式后处理装置中。
现有的箱式后处理装置实现了对DOC-DPF、SCR、尿素混合器的集成布置。其中，DOC和DPF串接，形成DOC-DPF；SCR分两路并排设置于箱壳内同侧，减小了后处理装置的长度方向尺寸；DOC-DPF、两路SCR、尿素混合器和排气管平行布置于箱壳内，通过箱壳两端的端盖实现相应部件的连通。工作时，尾气从后处理装置的进气口进入DOC-DPF单元，完成氧化催化和颗粒捕集，之后，气流通过端盖进入尿素混合器，同时尿素混合器内喷射尿素，尿素喷雾与废气均匀混合；混合均匀的混合气体从尿素混合器中出来后通过另一端端盖进入两路SCR，完成对氮氧化合物(NOX)的催化转化，最终废气从SCR中出来，通过排气尾管排出气体。
虽然能够实现良好的废气后处理，但是该箱式后处理装置的布局结构要求整车配套尺寸在宽度和高度方向上预留尺寸较大，难以满足更多的配套需求；通常情况下，为了方便DPF的维修，箱式后处理装置装配在整车上后，需要使 DPF位于外侧上方，而该箱式后处理装置为了实现该目的，只能装配在整车的右侧，无法实现左侧布置。
综上所述，如何解决现有箱式后处理装置无法通用设置的问题，成为了本领域技术人员亟待解决的问题。
发明内容
有鉴于此，本发明的目的在于提供一种通用化集成式DOC-DPF-SCR后处理装置，以实现在不同整车上的通用配套安装。
为达到上述目的，本发明提供以下技术方案：
一种通用化集成式DOC-DPF-SCR后处理装置，包括箱体、DOC-DPF单元、两个SCR单元、一个或两个尿素混合器和排气管；所述箱体的横截面为正方形，所述DOC-DPF单元和所述排气管分别布置于正方形的一组对角的两个角上；两个所述SCR单元相对所述DOC-DPF单元和所述排气管所在的对角线对称布置；所述尿素混合器相对所述DOC-DPF单元和所述排气管所在的对角线对称布置；所述DOC-DPF单元中的废气排出后进入所述尿素混合器；所述尿素混合器中的混合废气排出后进入所述SCR单元，所述SCR单元中的废气排入所述排气管。
优选地，在上述的通用化集成式DOC-DPF-SCR后处理装置中，所述尿素混合器的数量为一个，所述尿素混合器的出口通过位于所述箱体前端的第二连接盘分流连通两个所述SCR单元的两个进口。
优选地，在上述的通用化集成式DOC-DPF-SCR后处理装置中，所述尿素混合器的数量为一个，两个SCR单元分别是第一SCR单元和第二SCR单元，所述尿素混合器的出口通过位于所述箱体前端的第二连接盘与所述第一SCR单元连通，所述第一SCR单元的出口通过位于所述箱体后端的第三连接盘与所述第二SCR单元的进口串接连通。
优选地，在上述的通用化集成式DOC-DPF-SCR后处理装置中，所述尿素混合器的数量为两个，所述DOC-DPF单元的出口通过位于所述箱体后端的第 一连接盘分流连通两个所述尿素混合器的进口，两个所述尿素混合器的出口分别通过两个位于所述箱体前端的第二连接盘与两个所述SCR单元的进口一一对应地连通。
优选地，在上述的通用化集成式DOC-DPF-SCR后处理装置中，所述箱体内设置有保温结构。
优选地，在上述的通用化集成式DOC-DPF-SCR后处理装置中，所述保温结构为隔热棉。
优选地，在上述的通用化集成式DOC-DPF-SCR后处理装置中，所述SCR单元和所述排气管所在的所述箱体一侧设置有用于安装于车架上的安装支架。
优选地，在上述的通用化集成式DOC-DPF-SCR后处理装置中，所述箱体的前端盖上设置有进气管组件，所述进气管组件的进气口朝向所述前端盖的前方、上方或侧方。
优选地，在上述的通用化集成式DOC-DPF-SCR后处理装置中，所述排气管的排气口位于所述箱体的前端盖、所述箱体的后端盖、所述箱体的底壁或所述箱体的侧壁上。
优选地，在上述的通用化集成式DOC-DPF-SCR后处理装置中，所述箱体上还设置有传感器和尿素喷嘴。
与现有技术相比，本发明的有益效果是：
本发明提供的通用化集成式DOC-DPF-SCR后处理装置中，箱体的横截面为正方形，DOC-DPF单元和排气管分别布置于正方形的一组对角的两个角上，两个SCR单元相对DOC-DPF单元和排气管所在的对角线对称布置；尿素混合器相对DOC-DPF单元和排气管所在的对角线对称布置；DOC-DPF单元中的废气排出后进入尿素混合器；尿素混合器中的混合废气排出后进入SCR单元，SCR单元中的废气排入排气管。由于本申请中的通用化集成式DOC-DPF-SCR后处理装置的箱体的横截面为正方形，且箱体内部的DOC-DPF单元和排气管分别布置于正方形的一组对角的两个角上，两个SCR单元相对DOC-DPF单元和排气管所在的对角线对称布置；尿素混合器相对DOC-DPF单元和排气管所在的对角线对称布置。因此，通用化集成式DOC-DPF-SCR后 处理装置可以方便各功能单元后期的互换，以及箱体的左右侧布置和进气和排气方式的灵活多样性布置，实现了在不同整车上的通用配套安装。
附图说明
为了更清楚地说明本发明实施例或现有技术中的技术方案，下面将对实施例或现有技术描述中所需要使用的附图作简单地介绍，显而易见地，下面描述中的附图仅仅是本发明的实施例，对于本领域普通技术人员来讲，在不付出创造性劳动的前提下，还可以根据提供的附图获得其他的附图。
图1本发明实施例提供的一种通用化集成式DOC-DPF-SCR后处理装置的内部布局结构示意图；
图2为本发明实施例提供的一种通用化集成式DOC-DPF-SCR后处理装置的结构示意图；
图3为本发明实施例提供的一种通用化集成式DOC-DPF-SCR后处理装置的爆炸结构示意图；
图4为本发明实施例提供的一种通用化集成式DOC-DPF-SCR后处理装置安装于车架右侧的布置示意图；
图5为本发明实施例提供的一种通用化集成式DOC-DPF-SCR后处理装置安装于车架左侧的布置示意图；
图6为本发明实施例提供的一种通用化集成式DOC-DPF-SCR后处理装置的进气管组件的布置示意图；
图7为本发明实施例提供的一种通用化集成式DOC-DPF-SCR后处理装置的排气管的布置示意图；
图8为本发明实施例提供的一种通用化集成式DOC-DPF-SCR后处理装置的装配结构示意图。
其中，1为箱体、11为前端盖、12为后端隔热罩、13为后端盖、2为SCR单元、3为排气管、31为排气口、4为尿素混合器、5为DOC-DPF单元、51为DOC单元、52为DPF单元、6为进气管组件、7为第二连接盘、8为第一连接盘、9为安装支架、A为压差传感器、B为氮氧传感器电子集成单元、C 尿素喷嘴、D为氮氧传感器探头、E为温度传感器。
具体实施方式
本发明的核心是提供了一种通用化集成式DOC-DPF-SCR后处理装置，实现了在不同整车上的通用配套安装。
下面将结合本发明实施例中的附图，对本发明实施例中的技术方案进行清楚、完整地描述，显然，所描述的实施例仅仅是本发明一部分实施例，而不是全部的实施例。基于本发明中的实施例，本领域普通技术人员在没有做出创造性劳动前提下所获得的所有其他实施例，都属于本发明保护的范围。
请参考图1-图8，本发明实施例提供了一种通用化集成式DOC-DPF-SCR后处理装置，包括箱体1、DOC-DPF单元5、两个SCR单元2、一个或两个尿素混合器4和排气管3。DOC-DPF单元5、SCR单元2、尿素混合器4和排气管3均设置于箱体1内，箱体1包括前端盖11、后端盖13和四周壁。DOC-DPF单元5是由卡箍将DOC单元51和DPF单元52连接构成，分别完成废气的氧化催化和PM的颗粒捕集，DOC-DPF单元5与前端盖11上的进气管组件6连接；箱体1的横截面为正方形，即平行于前端盖11和后端盖13的截面为正方形；DOC-DPF单元5和排气管3分别布置于正方形的一组对角的两个角上；两个SCR单元2相对DOC-DPF单元5和排气管3所在的对角线对称布置，优选对称布置于正方形的另一组对角的两个角上；尿素混合器4相对DOC-DPF单元5和排气管3所在的对角线对称布置；DOC-DPF单元5中的废气排出后进入尿素混合器4；尿素混合器4中的混合废气排出后进入SCR单元2，SCR单元2中的废气排入排气管3。
该通用化集成式DOC-DPF-SCR后处理装置的工作过程为：废气经进气管组件6进入DOC-DPF单元5，在DOC-DPF单元5中分别进行废气的氧化催化和PM的颗粒捕集，之后，废气进入尿素混合器4中，同时向尿素混合器4中喷射尿素，废气与尿素在尿素混合器4中混合均匀，之后，废气混合物进入SCR单元2中进行氮氧化合物的催化转化，最后，废气从SCR单元2中出来， 通过排气管3排出。
由于本申请中的通用化集成式DOC-DPF-SCR后处理装置的箱体1的横截面为正方形，且箱体1内部的DOC-DPF单元5和排气管3分别布置于正方形的一组对角的两个角上，两个SCR单元2相对DOC-DPF单元5和排气管3所在的对角线对称布置；尿素混合器4相对DOC-DPF单元5和排气管3所在的对角线对称布置。因此，通用化集成式DOC-DPF-SCR后处理装置可以方便各功能单元后期的互换；并且为了方便维护DOC-DPF单元5，将DOC-DPF单元5位于车架的外侧上方的情况下，该通用化集成式DOC-DPF-SCR后处理装置可以装配安装在车架的左侧或右侧，只需要调整通用化集成式DOC-DPF-SCR后处理装置的角度即可，由于箱体1为正方形，因此，转换角度设置后，并不会受到安装空间的限制，如图5所示，图5为设置在车架左侧的情况，图4为设置在车架右侧的情况；由于采用了该布置结构，因此，通用化集成式DOC-DPF-SCR后处理装置的进气和排气方式可以根据不同车辆的装配要求，实现灵活多样性布置，实现了在不同整车上的通用配套安装。
针对SCR单元2和尿素混合器4分别相对DOC-DPF单元5和排气管3所在的对角线对称布置的结构，本实施例提供了一种具体的SCR单元2和尿素混合器4的布置形式。如图2和图3所示，其中，两个SCR单元2对称布置于箱体1的正方形的一组对角的两个角上，尿素混合器4的数量为一个，尿素混合器4布置于DOC-DPF单元5和排气管3所在的对角线上，且位于DOC-DPF单元5和排气管3之间；DOC-DPF单元5的出口通过位于箱体1后端的第一连接盘8与尿素混合器4的进口连通，尿素混合器4的出口通过位于箱体1前端的第二连接盘7分流连通两个SCR单元2的两个进口，两个SCR单元2的出口与排气管3连通。即废气在尿素混合器4中先混合后，再出来分两路进入两个SCR单元2中。第二连接盘7具有分流的作用，具有一个进口和两个出口，进口与尿素混合器4的出口连通，两个出口分别与两个SCR单元2的进口连通。
本实施例提供了另一种具体的SCR单元2和尿素混合器4的布置形式，其中，尿素混合器4的数量为一个，尿素混合器4布置于DOC-DPF单元5和 排气管3所在的对角线上，且位于DOC-DPF单元5和排气管3之间；两个SCR单元2分别是第一SCR单元和第二SCR单元，第一SCR单元和第二SCR单元分别设置于箱体1的正方形的一组对角的两个角上；DOC-DPF单元5的出口通过位于箱体1后端的第一连接盘8与尿素混合器4的进口连通，尿素混合器4的出口通过位于箱体1前端的第二连接盘7与第一SCR单元的进口连通，第一SCR单元的出口通过位于箱体1后端的第三连接盘与第二SCR单元的进口串接连通，第二SCR单元的出口与排气管3连通。即废气在尿素混合器4中混合后，先在第一SCR单元中进行催化转化，再进入第二SCR单元中进行第二次催化转化，最后从排气管3排出。第二连接盘7具有一个进口和一个出口，实现尿素混合器4和第一SCR单元的单连通，第三连接盘具有一个进口和出口，实现第一SCR单元和第二SCR单元的单连通。
本实施例提供了第三种具体的SCR单元2和尿素混合器4的布置形式，其中，尿素混合器4的数量为两个，两个尿素混合器4相对DOC-DPF单元5和排气管3所在的对角线对称布置，且位于DOC-DPF单元5和排气管3之间。DOC-DPF单元5的出口通过位于箱体1后端的第一连接盘8分流连通两个尿素混合器4的进口，两个尿素混合器4的出口分别通过两个位于箱体1前端的第二连接盘8与两个SCR单元2的进口一一对应地连通。即废气从DOC-DPF单元5出来后先分流成两路，分别进入两个尿素混合器4中，分别进行混合，每个尿素混合器4中出来的废气混合物分别对应进入一个SCR单元2中。第一连接盘8具有一个进口和两个出口，具有分流的作用，第二连接盘7的数量为两个，均具有一个进口和一个出口，单独连通一个尿素混合器4和一个SCR单元2。
以上三种尿素混合器4和SCR单元2的布置形式均采用对称布置的结构，因此，能够实现箱体1的左右侧设置。
进一步地，在本实施例中，箱体1内设置有保温结构，用于对通用化集成式DOC-DPF-SCR后处理装置进行隔热保护。
具体地，在本实施例中，箱体1的前端盖11与箱体1的内部部件之间设置有隔热棉。箱体1的后端盖13与箱体1的后端隔热罩12之间设置有隔热棉。 箱体1的四周壁为双层结构，且双层结构内设置有隔热棉。此外，箱体1内的各个单元也可以通过设置双层结构和隔热棉的形式进行隔热处理。通过多层隔热保护有效降低了后处理装置表面的温度。
如图4和图5所示，在本实施例中，SCR单元2和排气管3所在的箱体1一侧设置有用于安装于车架上的安装支架9。由于SCR单元2的数量为两个，且相对DOC-DPF单元5和排气管3所在的对角线对称布置，因此，安装支架9在箱体1上的设置位置有两个，且两个设置位置相对DOC-DPF单元5和排气管3所在的对角线对称设置，两个安装支架可以实现箱体在车架的左右两侧的安装，同时保证DOC-DPF单元5位于车架的外侧上方，方便维护。
如图6所示，在本实施例中，箱体1的前端盖11上设置有进气管组件6，进气管组件6的进气口朝向前端盖11的前方、上方或侧方。前端盖11上不同位置冲孔，将进气管组件6直接布置在前端盖11上，实现了前进气、侧进气、上进气等多种进气方式的配套要求，适用于不同车辆的装配布置。同时，只是在前端盖11上不同位置冲孔、布置进气管组件6的方案，共用一种前端盖11，有效降低了开模成本。
如图7所示，在本实施例中，排气管3的排气口31位于箱体1的前端盖11、箱体1的后端盖13、箱体1的底壁或箱体1的侧壁上。SCR单元2的出口通常位于箱体1的后端，因此，排气管3的进口位于箱体1的后端。当排气管3的排气口31位于前端盖11上时，则排气管3为贯通前端盖11的长直管，当排气管3的排气口31位于后端盖13上时，则排气管3为贯通后端盖13的短直管；当排气管3的排气口31位于箱体1的底壁或侧壁上时，则排气管3可以为向下弯折弯管或左右侧面弯折的弯管，或者在直管上开设垂直向下或向左右的分支管。排气管3可以采用法兰连接，也可以采用插接式等多种连接结构。出气方式的多样性有效的拓宽了产品的配套领域，适用于不同的车辆装配。
如图8所示，在本实施例中，箱体1上还设置有传感器和尿素喷嘴C。传感器为对应各个功能单元的传感器，如压差传感器A、氮氧传感器探头D、氮氧传感器电子集成单元B、温度传感器E，各功能单元的传感器及尿素喷嘴C共同集成在箱体1上，实现总成供货，减少了配套的装配复杂性。集成式总成 既方便安装配套，也有利于提高各催化单元的温度，提升各功能单元的转化效率，有效降低废气污染物的排放。
本说明书中各个实施例采用递进的方式描述，每个实施例重点说明的都是与其他实施例的不同之处，各个实施例之间相同相似部分互相参见即可。
对所公开的实施例的上述说明，使本领域专业技术人员能够实现或使用本发明。对这些实施例的多种修改对本领域的专业技术人员来说将是显而易见的，本文中所定义的一般原理可以在不脱离本发明的精神或范围的情况下，在其它实施例中实现。因此，本发明将不会被限制于本文所示的这些实施例，而是要符合与本文所公开的原理和新颖特点相一致的最宽的范围。

Claims (10)

  1. 一种通用化集成式DOC-DPF-SCR后处理装置，包括箱体(1)、DOC-DPF单元(5)、两个SCR单元(2)、一个或两个尿素混合器(4)和排气管(3)；其特征在于，所述箱体(1)的横截面为正方形，所述DOC-DPF单元(5)和所述排气管(3)分别布置于正方形的一组对角的两个角上；两个所述SCR单元(2)相对所述DOC-DPF单元(5)和所述排气管(3)所在的对角线对称布置；所述尿素混合器(4)相对所述DOC-DPF单元(5)和所述排气管(3)所在的对角线对称布置；所述DOC-DPF单元(5)中的废气排出后进入所述尿素混合器(4)；所述尿素混合器(4)中的混合废气排出后进入所述SCR单元(2)，所述SCR单元(2)中的废气排入所述排气管(3)。
  2. 根据权利要求1所述的通用化集成式DOC-DPF-SCR后处理装置，其特征在于，所述尿素混合器(4)的数量为一个，所述尿素混合器(4)的出口通过位于所述箱体(1)前端的第二连接盘(7)分流连通两个所述SCR单元(2)的两个进口。
  3. 根据权利要求1所述的通用化集成式DOC-DPF-SCR后处理装置，其特征在于，所述尿素混合器(4)的数量为一个，两个SCR单元(2)分别是第一SCR单元和第二SCR单元，所述尿素混合器(4)的出口通过位于所述箱体(1)前端的第二连接盘(7)与所述第一SCR单元连通，所述第一SCR单元的出口通过位于所述箱体(1)后端的第三连接盘与所述第二SCR单元的进口串接连通。
  4. 根据权利要求1所述的通用化集成式DOC-DPF-SCR后处理装置，其特征在于，所述尿素混合器(4)的数量为两个，所述DOC-DPF单元(5)的出口通过位于所述箱体(1)后端的第一连接盘(8)分流连通两个所述尿素混合器(4)的进口，两个所述尿素混合器(4)的出口分别通过两个位于所述箱体(1)前端的第二连接盘(7)与两个所述SCR单元(2)的进口一一对应地连通。
  5. 根据权利要求1-4任一项所述的通用化集成式DOC-DPF-SCR后处理装置，其特征在于，所述箱体(1)内设置有保温结构。
  6. 根据权利要求5任一项所述的通用化集成式DOC-DPF-SCR后处理装置，其特征在于，所述保温结构为隔热棉。
  7. 根据权利要求1-4任一项所述的通用化集成式DOC-DPF-SCR后处理装置，其特征在于，所述SCR单元(2)和所述排气管(3)所在的所述箱体(1)一侧设置有用于安装于车架上的安装支架(9)。
  8. 根据权利要求1-4任一项所述的通用化集成式DOC-DPF-SCR后处理装置，其特征在于，所述箱体(1)的前端盖(11)上设置有进气管组件(6)，所述进气管组件(6)的进气口朝向所述前端盖(1)的前方、上方或侧方。
  9. 根据权利要求1-4任一项所述的通用化集成式DOC-DPF-SCR后处理装置，其特征在于，所述排气管(3)的排气口(31)位于所述箱体(1)的前端盖(11)、所述箱体(1)的后端盖(13)、所述箱体(1)的底壁或所述箱体(1)的侧壁上。
  10. 根据权利要求1-4任一项所述的通用化集成式DOC-DPF-SCR后处理装置，其特征在于，所述箱体(1)上还设置有传感器和尿素喷嘴(C)。
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CN114961929A (zh) * 2021-05-14 2022-08-30 无锡威孚力达催化净化器有限责任公司 双级后处理系统的控制方法、装置终端及可读存储介质
CN114961929B (zh) * 2021-05-14 2023-12-01 无锡威孚力达催化净化器有限责任公司 双级后处理系统的控制方法、装置终端及可读存储介质
CN114991926A (zh) * 2022-06-29 2022-09-02 东风商用车有限公司 应用于倾斜后处理器的安装结构

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RS63142B1 (sr) 2022-05-31
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