CN106837490A - A kind of auxiliary formula urea injection apparatus of the gas for emptying - Google Patents

A kind of auxiliary formula urea injection apparatus of the gas for emptying Download PDF

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Publication number
CN106837490A
CN106837490A CN201710203898.6A CN201710203898A CN106837490A CN 106837490 A CN106837490 A CN 106837490A CN 201710203898 A CN201710203898 A CN 201710203898A CN 106837490 A CN106837490 A CN 106837490A
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CN
China
Prior art keywords
urea
liquid
pipeline
air
road
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Pending
Application number
CN201710203898.6A
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Chinese (zh)
Inventor
赵栋
史建
高世亮
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
YANTAI YINGDE PRECISION MACHINERY Co.,Ltd.
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Environmental Protection Science And Technology (yantai) Co Ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
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Application filed by Environmental Protection Science And Technology (yantai) Co Ltd filed Critical Environmental Protection Science And Technology (yantai) Co Ltd
Priority to CN201710203898.6A priority Critical patent/CN106837490A/en
Publication of CN106837490A publication Critical patent/CN106837490A/en
Pending legal-status Critical Current

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Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01N—GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR MACHINES OR ENGINES IN GENERAL; GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR INTERNAL COMBUSTION ENGINES
    • F01N3/00—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust
    • F01N3/08—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for rendering innocuous
    • F01N3/10—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for rendering innocuous by thermal or catalytic conversion of noxious components of exhaust
    • F01N3/18—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
    • F01N3/206—Adding periodically or continuously substances to exhaust gases for promoting purification, e.g. catalytic material in liquid form, NOx reducing agents
    • 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
    • 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
    • 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
    • F01N2560/08—Exhaust systems with means for detecting or measuring exhaust gas components or characteristics the means being a pressure sensor
    • 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
    • F01N2610/1426—Filtration 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
    • 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
    • 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
    • F01N2900/00—Details of electrical control or of the monitoring of the exhaust gas treating apparatus
    • F01N2900/04—Methods of control or diagnosing
    • F01N2900/0416—Methods of control or diagnosing using the state of a sensor, e.g. of an exhaust gas sensor
    • 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
    • F01N2900/00—Details of electrical control or of the monitoring of the exhaust gas treating apparatus
    • F01N2900/06—Parameters used for exhaust control or diagnosing
    • F01N2900/18—Parameters used for exhaust control or diagnosing said parameters being related to the system for adding a substance into the exhaust
    • F01N2900/1806—Properties of reducing agent or dosing system
    • F01N2900/1808—Pressure
    • 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

Landscapes

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

Abstract

The present invention relates to a kind of auxiliary formula urea injection apparatus of gas for emptying, including urea liquid pipeline and air pipe line, urea liquid pipeline includes the urea box being sequentially connected, water influent pipeline, urea pump and drain pipe road, urea box is built with urea liquid, air pipe line includes the compressed air source being sequentially connected, air inlet pipeline, air pressure-adjusting valve and outlet pipe, also include more logical reversing arrangement, urea nozzle and time liquid branch road, the other end on drain pipe road is connected with one end of many logical reversing arrangements, the other end of many logical reversing arrangements is connected with urea nozzle, the other end of outlet pipe is connected with many logical reversing arrangements, return liquid branch road and be provided with back liquid electromagnetic valve, the one end for returning liquid branch road is connected with drain pipe road, the other end for returning liquid branch road is connected with urea box, more logical reversing arrangement is the multiple-way valve comprising at least four paths.

Description

A kind of auxiliary formula urea injection apparatus of the gas for emptying
Technical field
The present invention relates to the urea injection apparatus in a kind for the treatment of of diesel motor exhaust, more particularly to a kind of empty The auxiliary formula urea injection apparatus of gas.
Background technology
Main pollutant is NOx in diesel engine vent gas, to cause that diesel engine automobile reaches national emission regulation demands, I The main technological route of state is exactly SCR (SCR), with urea liquid as reducing agent in SCR aftertreatment system To remove the nitrogen oxides in diesel engine vent gas, so as to reach the requirement of the corresponding Abgasgesetz of country.The urea injection apparatus Operation principle be：Tail gas enters blast pipe, and urea nozzle is provided with blast pipe, sprays into urea for vehicle solution, and urea exists High temperature generates ammonia after issuing unboiled water solution and pyrolytic reaction, and inside catalyst converter, ammonia and nitrogen oxides occur reduction reaction, generation Nitrogen and water, so as to reach the effect of cleaning of off-gas.
Existing urea injection apparatus structure is as shown in figure 1, mainly include urea box 3, vehicle-mounted compressed air source 9, urea Pump 5 and urea nozzle 8., with urea box 3 and urea nozzle 8 by pipeline connection, vehicle-mounted compressed air source 9 is by sky for urea pump 5 Controlled atmosphere pressure valve 11 is connected with urea nozzle 8, and air filter is provided between vehicle-mounted compressed air source 9 and air pressure-adjusting valve 11 17, gas and urea liquid mix realization atomization in the cavity of urea nozzle 8.Vehicle-mounted compressed air source passes through air pressure-adjusting valve 11 connections for realizing gas circuit and fluid path, before the side of air pressure-adjusting valve is connected to urea nozzle by a bypass circulation, bypass Loop is provided with air solenoid valve 18, and this bypass circulation is in off state in spray regime, and urea injection apparatus has worked Cheng Hou, this road is opened, and the urea liquid in fluid path is drained into blast pipe from urea nozzle by compressed air, completes urea Emptying.Engine is in stopped status during due to emptying, and urea sprays into aiutage and crystallization occurs.When urea for vehicle solution goes out Now crystallize, the exhaust pipe of engine partly even will be plugged thoroughly, can also cause the change of discarded flow, the drop of conversion ratio Low, exhaust also can be impacted.Urea can not be used completely, cause waste, and the uniformity of urea spraying distribution also can It has been influenceed that, finally resulted in the spray nozzle clogging of jet module, in the case of high-temperature exhaust air, urea crystals have been decomposed and can also produce ammonia Gas, pollutes environment.
Therefore, the program can be such that urea liquid is crystallized in aiutage, and the discharge even influence of influence motor exhaust is started Machine performance.
The content of the invention
A kind of deficiency that the present invention exists for existing urea injection apparatus, there is provided auxiliary formula urea injection dress of the gas for emptying Put.
The technical scheme that the present invention solves above-mentioned technical problem is as follows：
A kind of auxiliary formula urea injection apparatus of the gas for emptying, including urea liquid pipeline and air pipe line, the urea are molten Liquid pipeline includes the urea box, water influent pipeline, urea pump and the drain pipe road that are sequentially connected, and urea box is built with urea liquid, institute Stating air pipe line includes the compressed air source, air inlet pipeline, air pressure-adjusting valve and the outlet pipe that are sequentially connected, it is characterised in that Also include more logical reversing arrangement, urea nozzle and return liquid branch road, the other end of the drain pipe road and outlet pipe leads to more with One end of reversing arrangement is connected, and the other end of many logical reversing arrangements is connected with urea nozzle, on described time liquid branch road Liquid electromagnetic valve is provided with back, described time one end of liquid branch road is connected with drain pipe road, described time other end and urea of liquid branch road Case is connected, and many logical reversing arrangements are the multiple-way valve comprising at least four paths.
The beneficial effects of the invention are as follows：
Urea injection apparatus of the invention can be controlled respectively by setting many logical reversing arrangements in urea spray regime Drain pipe road, outlet pipe are connected with the normal of urea nozzle, realize the normal function of urea injection apparatus, are sprayed in urea and filled Put using after finishing, lead to the conversion that reversing arrangement can carry out path, it is ensured that outlet pipe is connected with drain pipe road, in air more Impetus under, during the urea liquid of remaining in drain pipe road returned into urea box by returning liquid branch road so that urea is molten Liquid is recycled, it is to avoid urea liquid is discharged to the problem in blast pipe.
On the basis of above-mentioned technical proposal, the present invention can also do following improvement.
Further, the water influent pipeline is provided with urea filter, and the air inlet pipeline is provided with air filter.
Beneficial effect using above-mentioned further technical scheme is to carry out filtering and impurity removing to air and urea liquid, optimization The working environment of engine, environmental protection.
Further, the drain pipe road and outlet pipe are provided with pressure sensor.
Beneficial effect using above-mentioned further technical scheme is the pressure that can more understand and accurately know pipeline Situation, conveniently carries out the control of pressure and flow.
Further, many logical reversing arrangements are the one kind in six-way valve or eight ways valve.
Brief description of the drawings
Fig. 1 is the structural representation of existing urea injection apparatus；
Fig. 2 is the structural representation of the urea injection apparatus of the embodiment of the present invention 1；
Fig. 3 is the structural representation of the urea injection apparatus of the embodiment of the present invention 2；
Fig. 4 is the structural representation of the urea injection apparatus of the embodiment of the present invention 3；
Fig. 5 is the structural representation of the urea injection apparatus of the embodiment of the present invention 4；
In Fig. 1-5,1, urea liquid pipeline；2nd, air pipe line；3rd, urea box；4th, water influent pipeline；5th, urea pump；6th, liquid is gone out Pipeline；7th, lead to reversing arrangement more；8th, urea nozzle；9th, compressed air source；10th, air inlet pipeline；11st, air pressure-adjusting valve；12nd, outlet Pipeline；13rd, liquid branch road is returned；14th, liquid electromagnetic valve is returned；15th, urea filter；16th, pressure sensor；17th, air filter； 18th, air solenoid valve
Specific embodiment
Principle of the invention and feature are described below in conjunction with example, example is served only for explaining the present invention, and It is non-for limiting the scope of the present invention.
Embodiment 1：
As shown in Fig. 2 a kind of auxiliary formula urea injection apparatus of the gas for emptying, including urea liquid pipeline 1 and air pipe line 2, urea liquid pipeline includes the urea box 3, water influent pipeline 4, urea pump 5 and the drain pipe road 6 that are sequentially connected, urea box built with Urea liquid, air pipe line includes the compressed air source 9, air inlet pipeline 10, air pressure-adjusting valve 11 and the outlet pipe that are sequentially connected 12, also including many logical reversing arrangements 7, urea nozzle 8 and return liquid branch road 13, the other end of drain pipe road and outlet pipe with it is many One end of logical reversing arrangement is connected, and the other end that reversing arrangement is led to more is connected with urea nozzle, returns liquid branch road and is provided with back Liquid electromagnetic valve 14, one end for returning liquid branch road is connected with drain pipe road, and the other end for returning liquid branch road is connected with urea box, described More logical reversing arrangement is four-way valve.
Embodiment 2：
As shown in figure 3, a kind of auxiliary formula urea injection apparatus of the gas for emptying, including urea liquid pipeline 1 and air pipe line 2, urea liquid pipeline includes the urea box 3, water influent pipeline 4, urea pump 5 and the drain pipe road 6 that are sequentially connected, is set in water influent pipeline There is urea filter 15, built with urea liquid, air pipe line includes the compressed air source 9, air inlet being sequentially connected to urea box Pipeline 10, air pressure-adjusting valve 11 and outlet pipe 12, air inlet pipeline are provided with air filter 17, also including many logical commutation dresses Put 7, urea nozzle 8 and time liquid branch road 13, one end phases of the other end and many logical reversing arrangements of drain pipe road and outlet pipe Connection, the other end that reversing arrangement is led to more is connected with urea nozzle, returns liquid branch road and is provided with back liquid electromagnetic valve 14, returns liquid branch road One end be connected with drain pipe road, the other end for returning liquid branch road is connected with urea box, and many logical reversing arrangements are six logical Valve.
Embodiment 3：
As shown in figure 4, a kind of auxiliary formula urea injection apparatus of the gas for emptying, including urea liquid pipeline 1 and air pipe line 2, urea liquid pipeline includes the urea box 3, water influent pipeline 4, urea pump 5 and the drain pipe road 6 that are sequentially connected, urea box built with Urea liquid, air pipe line includes the compressed air source 9, air inlet pipeline 10, air pressure-adjusting valve 11 and the outlet pipe that are sequentially connected 12, also including many logical reversing arrangements 7, urea nozzle 8 and return liquid branch road 13, the other end of drain pipe road and outlet pipe with it is many One end of logical reversing arrangement is connected, and the other end that reversing arrangement is led to more is connected with urea nozzle, drain pipe road and escaping pipe Road is provided with pressure sensor 16, returns liquid branch road and is provided with back liquid electromagnetic valve 14, and the one end for returning liquid branch road is connected with drain pipe road Logical, the other end for returning liquid branch road is connected with urea box, and many logical reversing arrangements are eight ways valve.
Embodiment 4：
As shown in figure 5, a kind of auxiliary formula urea injection apparatus of the gas for emptying, including urea liquid pipeline 1 and air pipe line 2, urea liquid pipeline includes the urea box 3, water influent pipeline 4, urea pump 5 and the drain pipe road 6 that are sequentially connected, is set in water influent pipeline There is urea filter 15, built with urea liquid, air pipe line includes the compressed air source 9, air inlet being sequentially connected to urea box Pipeline 10, air pressure-adjusting valve 11 and outlet pipe 12, air inlet pipeline are provided with air filter 17, also including many logical commutation dresses Put 7, urea nozzle 8 and time liquid branch road 13, one end phases of the other end and many logical reversing arrangements of drain pipe road and outlet pipe Connection, the other end that reversing arrangement is led to more is connected with urea nozzle, and drain pipe road and outlet pipe are provided with pressure sensor 16, to return liquid branch road and be provided with back liquid electromagnetic valve 14, the one end for returning liquid branch road is connected with drain pipe road, returns the other end of liquid branch road It is connected with urea box, many logical reversing arrangements are four-way valve.
The course of work of urea injection apparatus of the invention is as follows：
Under engine behavior, return liquid electromagnetic valve and close, lead to reversing arrangement control drain pipe road, outlet pipe difference more It is connected with urea nozzle, urea pump draws urea liquid through water influent pipeline from urea box, urea liquid is filtered through urea and filled Enter urea pump after putting filtering, urea liquid is delivered to urea nozzle, compressed air through more logical reversing arrangement by drain pipe road Air in source delivers the air to urine after air filter filtering and air pressure-adjusting valve pressure regulation by many logical reversing arrangements Plain nozzle, gas and urea liquid mix realization atomization in the cavity of urea nozzle, after engine stop work, return liquid electromagnetic Valve is opened, and leads to reversing arrangement conversion direction more, and control outlet pipe is connected with drain pipe road, under the impetus of air, During the urea liquid of remaining in drain pipe road returned into urea box by returning liquid branch road so that urea liquid is recycled.
The foregoing is only presently preferred embodiments of the present invention, be not intended to limit the invention, it is all it is of the invention spirit and Within principle, any modification, equivalent substitution and improvements made etc. should be included within the scope of the present invention.

Claims (4)

1. the auxiliary formula urea injection apparatus of a kind of gas for emptying, including urea liquid pipeline and air pipe line, the urea liquid Pipeline includes the urea box, water influent pipeline, urea pump and the drain pipe road that are sequentially connected, and urea box is described built with urea liquid Air pipe line includes the compressed air source, air inlet pipeline, air pressure-adjusting valve and the outlet pipe that are sequentially connected, it is characterised in that also Including many logical reversing arrangements, urea nozzle and return liquid branch road, the other end of the drain pipe road and outlet pipe with lead to more One end of reversing arrangement is connected, and the other end of many logical reversing arrangements is connected with urea nozzle, on described time liquid branch road Liquid electromagnetic valve is provided with back, described time one end of liquid branch road is connected with drain pipe road, described time other end and urea of liquid branch road Case is connected, and many logical reversing arrangements are the multiple-way valve comprising at least four paths.
2. the auxiliary formula urea injection apparatus of the gas for emptying according to claim 1, it is characterised in that in the water influent pipeline Urea filter is provided with, the air inlet pipeline is provided with air filter.
3. the auxiliary formula urea injection apparatus of the gas for emptying according to claim 1, it is characterised in that the drain pipe road and Outlet pipe is provided with pressure sensor.
4. the auxiliary formula urea injection apparatus of the gas for emptying according to any one of claim 1-3, it is characterised in that described Many logical reversing arrangements are the one kind in six-way valve or eight ways valve.
CN201710203898.6A 2017-03-30 2017-03-30 A kind of auxiliary formula urea injection apparatus of the gas for emptying Pending CN106837490A (en)

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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN113606018A (en) * 2021-08-05 2021-11-05 宁波楷世环保科技有限公司 Urea solution back-pumping control device and fault diagnosis method thereof

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Publication number Priority date Publication date Assignee Title
EP2116700A1 (en) * 2008-05-09 2009-11-11 MAGNETI MARELLI POWERTRAIN S.p.A. Injection method and device for injecting a reducing substance into an exhaust system of an internal combustion engine
CN102691553A (en) * 2012-06-13 2012-09-26 安徽艾可蓝节能环保科技有限公司 Air-assisting type SCR (Selective Catalyst Reaction) system
CN102748101A (en) * 2012-07-10 2012-10-24 天津亿利汽车环保科技有限公司 Urea injection system for reducing NOx discharge of engine and control method thereof
CN203321642U (en) * 2013-06-18 2013-12-04 苏州派格丽减排系统有限公司 SCR metering injection device
CN103352745A (en) * 2013-06-20 2013-10-16 厚德融智(北京)云计算技术研究院 Air assisted type urea pump system
CN104005820A (en) * 2014-05-19 2014-08-27 西南交通大学 Hydraulic pipeline urea evacuation method for vapour-pressure type urea measurement injection system
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CN104863672A (en) * 2015-04-07 2015-08-26 西南交通大学 Simple pneumatic urea dosing system
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