CN113250788A - Tail gas dual-drop treatment system for in-use vehicle - Google Patents

Tail gas dual-drop treatment system for in-use vehicle Download PDF

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Publication number
CN113250788A
CN113250788A CN202110434690.1A CN202110434690A CN113250788A CN 113250788 A CN113250788 A CN 113250788A CN 202110434690 A CN202110434690 A CN 202110434690A CN 113250788 A CN113250788 A CN 113250788A
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China
Prior art keywords
tail gas
control unit
main body
exhaust gas
urea
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Application number
CN202110434690.1A
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Chinese (zh)
Inventor
龚长友
路路
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Nanjing Lonsen Automation Equipment Co ltd
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Nanjing Lonsen Automation Equipment Co ltd
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Priority to CN202110434690.1A priority Critical patent/CN113250788A/en
Publication of CN113250788A publication Critical patent/CN113250788A/en
Pending legal-status Critical Current

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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
    • 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
    • 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
    • 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
    • F01N3/105—General auxiliary catalysts, e.g. upstream or downstream of the main catalyst
    • F01N3/106—Auxiliary oxidation catalysts
    • 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
    • F01N3/2006—Periodically heating or cooling catalytic reactors, e.g. at cold starting or overheating
    • F01N3/2013—Periodically heating or cooling catalytic reactors, e.g. at cold starting or overheating using electric or magnetic heating means
    • 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
    • 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
    • F01N9/00—Electrical control of exhaust gas treating apparatus
    • 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
    • F01N2560/00—Exhaust systems with means for detecting or measuring exhaust gas components or characteristics
    • F01N2560/02—Exhaust systems with means for detecting or measuring exhaust gas components or characteristics the means being an exhaust gas sensor
    • F01N2560/026—Exhaust systems with means for detecting or measuring exhaust gas components or characteristics the means being an exhaust gas sensor for measuring or detecting NOx
    • 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
    • F01N2610/00—Adding substances to exhaust gases
    • F01N2610/02—Adding substances to exhaust gases the substance being ammonia or urea
    • 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
    • F01N2610/00—Adding substances to exhaust gases
    • F01N2610/14—Arrangements for the supply of substances, e.g. conduits
    • F01N2610/1433—Pumps
    • 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
    • F01N2610/00—Adding substances to exhaust gases
    • F01N2610/14—Arrangements for the supply of substances, e.g. conduits
    • F01N2610/1453—Sprayers or atomisers; Arrangement thereof in the exhaust apparatus
    • F01N2610/146—Control thereof, e.g. control of injectors or injection valves
    • 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
    • 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
    • Y02T10/40—Engine management systems

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  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Combustion & Propulsion (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Health & Medical Sciences (AREA)
  • Toxicology (AREA)
  • Materials Engineering (AREA)
  • Exhaust Gas After Treatment (AREA)

Abstract

The invention discloses a tail gas double-reduction treatment system for an on-vehicle, belonging to the technical field of tail gas treatment, and comprising an SCR system module, a particulate matter filtering module, a heater module and a tail gas treatment main body; the particulate matter filtering module comprises an oxidation catalyst (DOC) and a coated particle catcher (cDPF), and the oxidation catalyst and the coated particle catcher are both arranged inside the exhaust gas treatment main body; the heater module comprises an Electronic Control Unit (ECU), an oil nozzle arranged in the tail gas treatment main body and a metering unit connected with the oil nozzle; the metering unit is electrically connected with the ECU, and sends flow information passing through the oil nozzle to the ECU.

Description

Tail gas dual-drop treatment system for in-use vehicle
Technical Field
The invention belongs to the technical field of tail gas treatment, and particularly relates to a tail gas double-reduction treatment system for an on-vehicle.
Background
At present, various policies control atmospheric pollution, wherein a part of pollution sources come from diesel engine vehicles, the pollutants of the diesel engines mainly comprise particulate matters and nitrogen oxides due to the technical characteristics of the diesel engines, and the pollutants of the diesel engines can be controlled by the engines or exhaust pollutants can be controlled by an aftertreatment device. The diesel engine aftertreatment ware is mainly through DPF improvement particulate matter (black cigarette) and SCR improvement nitrogen oxide, because DPF is a physical filter, along with the difference of live time, can lead to DPF to block up and lose effect, need wash just can the recovery function after the DPF blocks up, this process is also called "DPF regeneration", DPF regeneration's method is many, there is electric heating, microwave heating, fuel additive and combustor heating etc., current processing system purification efficiency is lower, the oil consumption increases greatly in the processing procedure, the waste of resource has been caused, can't realize online monitoring simultaneously, consequently, need research and development a neotype tail gas two processing system that drop to solve current problem.
Disclosure of Invention
The invention aims to provide an exhaust gas double-reduction treatment system for an on-vehicle, which aims to solve the problem of low exhaust gas treatment efficiency.
In order to achieve the purpose, the invention provides the following technical scheme: a tail gas dual-reduction treatment system for an on-vehicle comprises a selective reducer system module, a particulate matter filtering module, a heater module and a tail gas treatment main body;
the particulate matter filtering module comprises an oxidation catalyst (DOC) and a coated particle trap (cDPF), and the oxidation catalyst and the coated particle trap are both arranged inside the exhaust gas treatment main body;
the heater module comprises an Electronic Control Unit (ECU), an oil nozzle arranged in the tail gas treatment main body and a metering unit connected with the oil nozzle; the metering unit is electrically connected with an Electronic Control Unit (ECU) and sends flow information passing through the oil nozzle to the Electronic Control Unit (ECU);
the selective reduction device system module comprises a urea injection control unit (DCU), a urea box, a nozzle, a urea pump, a selective reduction device (SCR) and an ammonia oxidation catalyst, wherein the nozzle is installed on the tail gas treatment main body and connected with a MIXER (MIXER) in the tail gas treatment main body, the urea pump is connected with the urea box and used for inputting urea in the urea box into the nozzle, and the selective reduction device (SCR) and the ammonia oxidation catalyst are installed in the tail gas treatment main body.
Preferably, the tail gas inlet pipe and the tail gas outlet pipe are welded at the two ends of the tail gas treatment main body respectively, the tail gas inlet pipe is installed at the end part of the tail gas inflow direction, and the tail gas outlet pipe is installed at the end part of the tail gas outflow direction.
Preferably, the selective reducer system module further includes a first nitrogen oxide sensor (NOx-1) connected to the urea injection control unit (DCU), a third temperature sensor connected to the urea injection control unit (DCU), and a second nitrogen oxide sensor (NOx-2) connected to the urea injection control unit (DCU).
Preferably, the first nitrogen-oxygen sensor (NOx-1) is mounted on the exhaust gas inlet pipe and sends the nitrogen-oxygen concentration in the exhaust gas inlet pipe to a urea injection control unit (DCU);
the third temperature sensor is mounted on the exhaust gas treatment body and is located between the MIXER (MIXER) and the coated particle trap (cDPF);
the fourth temperature sensor is arranged at the position, close to the tail gas outlet pipe, of the tail gas treatment main body;
and the second nitrogen oxide sensor (NOx-2) is arranged on the tail gas outlet pipe.
Preferably, the urea tank is further connected with one end of an anti-freezing liquid water tank, and the other end of the anti-freezing liquid water tank is connected with the nozzle.
Preferably, the ammonia oxidation catalyst (ASC) is installed in the exhaust gas treatment main body near the exhaust gas outlet pipe, and the selective reduction device (SCR) is installed between the MIXER (MIXER) and the ammonia oxidation catalyst (ASC).
Preferably, the Electronic Control Unit (ECU) is further connected with a first temperature sensor, and the first temperature sensor (T1) is mounted on the inner wall of the exhaust gas treatment main body close to the exhaust gas inlet pipe.
Preferably, the coated particle trap (cDPF) is installed between an oxidation catalyst (DOC) and a MIXER (MIXER), the output and the input of the coated particle trap (cDPF) are respectively provided with a DPF differential pressure sensor, the DPF differential pressure sensor is electrically connected to an Electronic Control Unit (ECU), differential pressure data of the output and the input of the coated particle trap (cDPF) are collected and sent to the Electronic Control Unit (ECU), the Electronic Control Unit (ECU) is further connected with a second temperature sensor, and the second temperature sensor is installed at the input port of the coated particle trap (cDPF).
Preferably, the system further comprises an online monitoring module, and the online monitoring module is connected with an Electronic Control Unit (ECU) and a urea injection control unit (DCU) through CAN lines.
Preferably, the online monitoring module is connected with a particulate matter sensor (PM), and the particulate matter sensor (PM) is installed on the exhaust gas outlet pipe.
The invention has the technical effects and advantages that: this a tail gas is two processing system that falls for using car, simple structure, good reliability, on the one hand, reduced the nitrogen oxygen gas emission, on the other hand, the oil consumption increases and is no longer than 5%, and the urea consumption is no longer than 5% of oil consumption, has improved fuel economy, combines through oxidation type catalyst converter, area coating particle trapper and selective reduction ware, has solved the problem that tail gas treatment efficiency is not high.
Drawings
Fig. 1 is a schematic diagram of the framework of the present invention.
In the figure: 4. a tail gas treatment main body; 11. a urea injection control unit; 12. a urea pump; 13. a nozzle; 14. a urea tank; 141. an antifreeze solution tank; 15A, a third temperature sensor; 15B, a fourth temperature sensor; 16A, a first nitrogen-oxygen sensor; 16B, a second nitrogen oxide sensor; 17. an ammonia oxidation catalyst; 18. a selective reducer; 19. a mixer; 21. an oxidation catalyst; 22. a coated particle trap; 31. an online monitoring module; 32. a particulate matter sensor; 41. a tail gas inlet pipe; 42. a tail gas outlet pipe; 51. an electronic control unit; 52. a metering unit; 53. an oil jet; 54. a first temperature sensor; 55. a second temperature sensor; 56. DPF pressure difference sensor.
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.
The invention provides an exhaust gas double-reduction treatment system for an on-vehicle as shown in fig. 1, which comprises a selective reducer system module, a particulate matter filtering module, a heater module and an exhaust gas treatment main body 4; the system also comprises an online monitoring module 31, in order to facilitate monitoring, the online monitoring module 31 is connected with the electronic control unit 51 and the urea injection control unit 11 through CAN lines, in the embodiment, the online monitoring module 31 is connected with a particulate matter sensor 32, and the particulate matter sensor 32 is installed on the tail gas outlet pipe 42, so that remote monitoring is realized, and the convenience of the system is improved;
in this embodiment, a tail gas inlet pipe 41 and a tail gas outlet pipe 42 are welded to two ends of the tail gas treatment main body 4, the tail gas inlet pipe 41 is installed at the end portion of the tail gas flowing-in direction, and the tail gas outlet pipe 42 is installed at the end portion of the tail gas flowing-out direction.
The particulate matter filtering module comprises an oxidation catalyst 21 and a coated particle catcher 22, and the oxidation catalyst 21 and the coated particle catcher 22 are both arranged inside the exhaust gas treatment main body 4; the heater module comprises an electronic control unit 51, an oil nozzle 53 arranged in the tail gas treatment main body 4 and a metering unit 52 connected with the oil nozzle 53; the metering unit 52 is electrically connected with the electronic control unit 51, and sends the flow information passing through the oil nozzle 53 to the electronic control unit 51;
the selective reducer system module comprises a urea injection control unit 11, a urea tank 14, a nozzle 13 which is arranged on the tail gas treatment main body 4 and connected with a mixer 19 in the tail gas treatment main body 4, a urea pump 12 which is connected with the urea tank 14 and inputs urea in the urea tank 14 into the nozzle 13, a selective reducer 18 and an ammonia oxidation catalyst 17 which are arranged in the tail gas treatment main body 4, in the embodiment, the ammonia oxidation catalyst 17 is arranged in the tail gas treatment main body 4 close to a tail gas outlet pipe 42, the selective reducer 18 is arranged between the mixer 19 and the ammonia oxidation catalyst 17, the selective reducer system module further comprises a first nitrogen-oxygen sensor 16A connected with the urea injection control unit 11, a third temperature sensor 15B connected with the urea injection control unit 11 and a second nitrogen-oxygen sensor 16B connected with the urea injection control unit 11 (ii) a In the present embodiment, the first nox sensor 16A is mounted on the exhaust gas intake pipe 41, and sends the nox concentration in the exhaust gas intake pipe 41 to the urea injection control unit 11; the coated particle catcher 22 is arranged between the oxidation catalyst 21 and the mixer 19, a pair of DPF differential pressure sensors 56 are arranged at the output end and the input end of the coated particle catcher 22, the DPF differential pressure sensors 56 are respectively and electrically connected to the electronic control unit 51, the differential pressure data of the output end and the input end of the coated particle catcher 22 are collected and sent to the electronic control unit 51, the electronic control unit 51 is also connected with a second temperature sensor 55, and the second temperature sensor 55 is arranged at the input port of the coated particle catcher 22;
in this embodiment, in order to further improve the purification effect, one end of an antifreeze solution tank 141 is further connected to the urea tank 14, and the other end of the antifreeze solution tank 141 is connected to the nozzle 13;
in this embodiment, the fourth temperature sensor 15B is installed at the position close to the exhaust gas outlet pipe 42 of the exhaust gas treatment main body 4;
the second nitrogen oxide sensor 16B is arranged on the tail gas outlet pipe 42;
in this embodiment, the electronic control unit 51 is further connected to a first temperature sensor 54, and the first temperature sensor 54 is mounted on an inner wall of the exhaust gas treatment body 4 close to the exhaust gas inlet pipe 41.
The working principle is as follows: this a two processing system that fall of tail gas for using car installs the two processing system that fall of tail gas on the exhaust emission pipeline, and in tail gas enters into tail gas treatment main part 4 from tail gas intake pipe 41, oxidation type catalytic converter 21 was at the temperature of settlement NO oxidation for NO2Providing NO for regeneration of the coated particle trap 222While also providing NO for the rapid reduction reaction of selective reducer 182(ii) a Utilize the good fuel oil of oxidation type catalyst converter 21 to start the nature of burning, realize smoothly that the area coats the initiative regeneration of particle trapper 22, promote the initiative regeneration efficiency who takes coated particle trapper 22, reduce fuel consumption, improve fuel economy, spray urea aqueous solution in tail gas treatment main part 4 simultaneously, the ammonia that releases after urea aqueous solution hydrolyzes can react with the NOx gas in the tail gas and generate nitrogen gas, tail gas after the processing is discharged from tail gas outlet duct 42, nitrogen oxide gas emission has been reduced.
Finally, it should be noted that: although the present invention has been described in detail with reference to the foregoing embodiments, it will be apparent to those skilled in the art that modifications may be made to the embodiments or portions thereof without departing from the spirit and scope of the invention.

Claims (10)

1. A two processing system that fall of tail gas for using car which characterized in that: comprises a selective reducer system module, a particulate matter filtering module, a heater module and a tail gas treatment main body (4); the particulate matter filtering module comprises an oxidation catalyst (21) and a coated particle catcher (22), and the oxidation catalyst (21) and the coated particle catcher (22) are both arranged inside the tail gas treatment main body (4); the heater module comprises an electronic control unit (51), an oil nozzle (53) arranged in the tail gas treatment main body (4), and a metering unit (52) connected with the oil nozzle (53); the metering unit (52) is electrically connected with the electronic control unit (51) and sends flow information passing through the oil nozzle (53) to the electronic control unit (51); the selective reducer system module comprises a urea injection control unit (11), a urea box (14), a nozzle (13) which is installed on the tail gas treatment main body (4) and connected with a mixer (19) in the tail gas treatment main body (4), a urea pump (12) which is connected with the urea box (14) and inputs urea in the urea box (14) into the nozzle (13), a selective reducer (18) installed in the tail gas treatment main body (4) and an ammonia oxidation catalyst (17).
2. The exhaust gas double-drop treatment system for the on-vehicle according to claim 1, wherein: the tail gas treatment device is characterized in that a tail gas inlet pipe (41) and a tail gas outlet pipe (42) are welded at the two ends of the tail gas treatment main body (4) respectively, the tail gas inlet pipe (41) is installed at the end part of the tail gas inflow direction, and the end part of the tail gas outflow direction is installed on the tail gas outlet pipe (42).
3. The exhaust gas double-drop treatment system for the on-vehicle according to claim 1, wherein: the selective reducer system module further comprises a first nitrogen-oxygen sensor (16A) connected with the urea injection control unit (11), a third temperature sensor (15A) connected with the urea injection control unit (11), a fourth temperature sensor (15B) connected with the urea injection control unit (11), and a second nitrogen-oxygen sensor (16B) connected with the urea injection control unit (11).
4. The exhaust gas double-drop treatment system for the on-vehicle according to claim 3, wherein: the first nitrogen-oxygen sensor (16A) is arranged on the tail gas inlet pipe (41) and sends the nitrogen-oxygen concentration in the tail gas inlet pipe (41) to the urea injection control unit (11); the third temperature sensor 15A) is mounted on the exhaust treatment body (4) and is located between the mixer (19) and the coated particle trap (22);
the fourth temperature sensor (15B) is arranged at the position, close to the tail gas outlet pipe (42), of the tail gas treatment main body (4); and the second nitrogen-oxygen sensor (16B) is arranged on the tail gas outlet pipe (42).
5. The exhaust gas double-drop treatment system for the on-vehicle according to claim 1, wherein: the urea box (14) is also connected with one end of an antifreezing solution water tank (141), and the other end of the antifreezing solution water tank (141) is connected with the nozzle (13).
6. The exhaust gas double-drop treatment system for the on-vehicle according to claim 1, wherein: the ammonia oxidation catalyst (17) is arranged in the tail gas treatment main body (4) and close to the tail gas outlet pipe (42), and the selective reducer (18) is arranged between the mixer (19) and the ammonia oxidation catalyst (17).
7. The exhaust gas double-drop treatment system for the on-vehicle according to claim 1, wherein: the electronic control unit (51) is further connected with a first temperature sensor (54), and the first temperature sensor (54) is installed on the inner wall, close to the exhaust gas inlet pipe (41), of the exhaust gas treatment main body (4).
8. The exhaust gas double-drop treatment system for the on-vehicle according to claim 1, wherein: the coated particle trap (22) is arranged between an oxidation catalyst (21) and a mixer (19), a pair of DPF differential pressure sensors (56) is arranged at the output end and the input end of the coated particle trap (22), the DPF differential pressure sensors (56) are electrically connected to an electronic control unit (51) respectively, the pressure difference data of the output end and the input end of the coated particle trap (22) are collected and sent to the electronic control unit (51), a second temperature sensor (55) is further connected to the electronic control unit (51), and the second temperature sensor (55) is arranged at the input port of the coated particle trap (22).
9. An exhaust gas double drop treatment system for an on-board vehicle according to any of claims 1-8, wherein: the system further comprises an online monitoring module (31), and the online monitoring module (31) is connected with the electronic control unit (51) and the urea injection control unit (11) through CAN lines.
10. The exhaust gas double-drop treatment system for the on-vehicle according to claim 9, wherein: the on-line monitoring module (31) is connected with a particulate matter sensor (32), and the particulate matter sensor (32) is installed on the tail gas outlet pipe (42).
CN202110434690.1A 2021-04-22 2021-04-22 Tail gas dual-drop treatment system for in-use vehicle Pending CN113250788A (en)

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