CN208520587U - Diesel engine post-processing system endurance test platform - Google Patents
Diesel engine post-processing system endurance test platform Download PDFInfo
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- CN208520587U CN208520587U CN201721884101.5U CN201721884101U CN208520587U CN 208520587 U CN208520587 U CN 208520587U CN 201721884101 U CN201721884101 U CN 201721884101U CN 208520587 U CN208520587 U CN 208520587U
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Abstract
The utility model provides a kind of diesel engine post-processing system endurance test platform, gas simulation system including generating NOx gas, simulation diesel engine fuel oil burns and discharges the tail gas simulation system of high-temperature tail gas, it is connected to the gas exhaust manifold of gas simulation system and tail gas simulation system, and to the gas componant and the exhaust gas analysis system that measures of content in gas exhaust manifold.Pass through gas simulation system, generate NOx gas, it is connected to the discharge pipe of tail gas simulation system, it is mixed with the high-temperature tail gas generated after the burning of tail gas simulation system intermediate fuel oil, is emitted into gas exhaust manifold jointly, and be connected to exhaust gas analysis system, by exhaust gas analysis system in gas exhaust manifold gas componant and content detect, stable NOx gas is generated by gas simulation system, it is accurate to simulate diesel engine vent gas condition, appraisal is carried out to the performance reliability of after-treatment system.
Description
Technical field
The utility model relates to diesel engine performance the field of test technology, more specifically to a kind of diesel engine after treatment
System endurance test platform.
Background technique
SCR (Selective Catalytic Reduction) technology is also known as selective catalytic reduction, a kind of elimination diesel oil
The technology of machine nox in exhaust (NOx).
With the extensive use of the after-treatment systems such as SCR, performance and durability are also of increasing concern, need to its into
Row examination.It is enterprising that the performance and durable certification test of existing after-treatment system and components are usually put in threst stand
Row, durable certification test refer to the single-point transformation efficiency test of endurance test and durable front and back to after-treatment systems such as SCR, with
It realizes the NOx concentration tested before and after after-treatment system under assigned temperature and exhaust gas flow, NOx conversion efficiency is calculated with this.
However, Bench Test System is complicated using block testing stand, prepares and the test period is longer, be unfavorable for improving
Efficiency of research and development, and since the catalyst durable examination time is long, it is very high that testing expenses are carried out on engine pedestal.
Threst stand system complex, diesel engine state, boundary Control condition are difficult to ensure completely when test every time
Unanimously, the key parameter for be easy to causeing exhausted air quantity, delivery temperature, exhaust gas component etc. to influence after-treatment system transformation efficiency becomes
Change, to be had an impact to the practical transformation efficiency of after-treatment system.
It is limited by diesel engine working characteristics itself, the attainable air speed of endurance test and single-point transformation efficiency test institute and row
Warm range is all limited, cannot examine in bigger temperature and space velocity range to after-treatment systems such as SCR.Engine is caused to try
Platform time and effort consuming is tested, test efficiency is lower.
Therefore, the difficulty of test for how reducing diesel engine post-processing system is that current those skilled in the art are urgently to be resolved
The problem of.
Utility model content
In view of this, the present invention provides a kind of diesel engine post-processing system endurance test platforms, to reduce diesel oil
The difficulty of test of machine after-treatment system.
In order to achieve the above object, the utility model provides the following technical solutions:
A kind of diesel engine post-processing system endurance test platform, the gas simulation system including generating NOx gas, simulates bavin
Oil machine fuel burning and the tail gas simulation system for discharging high-temperature tail gas are connected to the gas simulation system and tail gas simulation system
The gas exhaust manifold of system, and in the gas exhaust manifold gas componant and the tails assay system that measures of content
System.
Preferably, in above-mentioned diesel engine post-processing system endurance test platform, the gas simulation system includes spraying into
The spraying system of aqueous solution of urea；
It is set to the output end of the spraying system, the mixer of mixing urea aqueous solution and air；
It is set to the output end of the mixer, decomposes the DOC of mixed aqueous solution of urea.
Preferably, in above-mentioned diesel engine post-processing system endurance test platform, the input terminal of the spraying system is also set
It is equipped with the electric heater heated to the air of feeding, the front end of the electric heater is provided with filtered the air
One filter, and the first air blower of power of supplying gas is provided.
Preferably, in above-mentioned diesel engine post-processing system endurance test platform, the DOC includes the more of arranged in series
It is a.
Preferably, in above-mentioned diesel engine post-processing system endurance test platform, the tail gas simulation system includes fuel oil
Injector and the tonifying Qi pipeline that air is blowed to the fuel injector, the fuel injector ejection end setting to fuel oil into
The burner of row burning.
Preferably, in above-mentioned diesel engine post-processing system endurance test platform, the fuel injector and the burning
It is additionally provided between device and preheating pre-heater is carried out to the fuel oil of mixing air.
Preferably, in above-mentioned diesel engine post-processing system endurance test platform, the blowdown pipe road is provided with to sky
The second filter and the second air blower that gas is filtered.
Preferably, in above-mentioned diesel engine post-processing system endurance test platform, the gas outlet pipe road is provided with
To the minimum gas gas cylinder of the exhaust gas components such as its inner exhaust gas supplement HC, CO, and vapor in the supplement gas exhaust manifold
Heater.
Preferably, in above-mentioned diesel engine post-processing system endurance test platform, the exhaust gas analysis system includes urea
Spraying system, after-treatment system, and to the sampling system that the after-treatment system treated exhaust gas component and content are analyzed
System and FTIR tail gas test macro.
Preferably, in above-mentioned diesel engine post-processing system endurance test platform, the urea injection system and it is described after
The second mixer is also set up between processing system.
Diesel engine post-processing system endurance test platform provided by the utility model, the gas mould including generating NOx gas
Quasi- system, simulation diesel engine fuel oil burn and discharge the tail gas simulation system of high-temperature tail gas, are connected to gas simulation system and tail gas
The gas exhaust manifold of simulation system, and in gas exhaust manifold gas componant and the tails assay system that measures of content
System.By gas simulation system, NOx gas is generated, is connected to the discharge pipe of tail gas simulation system, with tail gas simulation system
The high-temperature tail gas mixing generated after the burning of intermediate fuel oil, is emitted into gas exhaust manifold, and be connected to exhaust gas analysis system jointly,
By exhaust gas analysis system in gas exhaust manifold gas componant and content detect, generated by gas simulation system steady
Fixed NOx gas, it is accurate to simulate diesel engine vent gas condition, appraisal is carried out to the performance reliability of after-treatment system.
Detailed description of the invention
In order to illustrate the embodiment of the utility model or the technical proposal in the existing technology more clearly, below will be to embodiment
Or attached drawing needed to be used in the description of the prior art is briefly described, it should be apparent that, the accompanying drawings in the following description is only
It is some embodiments of the utility model, for those of ordinary skill in the art, in the premise not made the creative labor
Under, it is also possible to obtain other drawings based on these drawings.
Fig. 1 is the layout structure schematic diagram of diesel engine post-processing system endurance test platform provided by the utility model.
Specific embodiment
The utility model discloses a kind of diesel engine post-processing system endurance test platforms, reduce diesel engine after treatment system
The difficulty of test of system.
The following will be combined with the drawings in the embodiments of the present invention, carries out the technical scheme in the embodiment of the utility model
Clear, complete description, it is clear that the described embodiments are only a part of the embodiments of the utility model, rather than whole
Embodiment.Based on the embodiments of the present invention, those of ordinary skill in the art institute without making creative work
The every other embodiment obtained, fall within the protection scope of the utility model.
As shown in FIG. 1, FIG. 1 is the layout structures of diesel engine post-processing system endurance test platform provided by the utility model
Schematic diagram.
This application provides a kind of diesel engine post-processing system endurance test platforms, the gas mould including generating NOx gas
Quasi- system 1, simulation diesel engine fuel oil burn and discharge the tail gas simulation system 2 of high-temperature tail gas, are connected to gas simulation system 1 and tail
The gas exhaust manifold 102 of gas simulation system 2, and in gas exhaust manifold 102 gas componant and content measure
Exhaust gas analysis system 3.By gas simulation system 1, NOx gas is generated, is connected to the discharge pipe of tail gas simulation system 2,
It is mixed with the high-temperature tail gas generated after the burning of 2 intermediate fuel oil of tail gas simulation system, is emitted into gas exhaust manifold 102 jointly, and
Be connected to exhaust gas analysis system 3, by exhaust gas analysis system 3 in gas exhaust manifold gas componant and content detect,
Stable NOx gas is generated by gas simulation system 1, it is accurate to simulate diesel engine vent gas condition, to the performance of after-treatment system
Reliability carries out appraisal.
In one specific embodiment of this case, gas simulation system 1 includes the spraying system 11 for spraying into aqueous solution of urea；Setting
In the output end of spraying system 11, the mixer 12 of mixing urea aqueous solution and air；It is set to the output end of mixer 12, point
Solve the DOC10 of mixed aqueous solution of urea.
The simulation of gas simulation system generates the NOx gas in diesel engine vent gas, and NOx gas is generated by DOC10, and DOC is
Diesel oxidation converter, under certain condition can be by the NH in tail gas3It is oxidized into NO and NO2Gas passes through injection system
11 injection aqueous solution of urea of system, the mixing of mixing urea aqueous solution and air is carried out in mixer 12, is sent into DOC10 after mixing
In, ammonia is generated through decomposing under the action of catalyst in DOC10, the oxygen in ammonia and air occurs chemical reaction and generates
NOx gas.
In order to control NOx gas component content, can be matched during the reaction by reaction temperature, air speed and DOC catalyst
Side further controls NO and NO in NOx at grading mode2Ratio, with the component one further with the NOx being discharged in diesel engine
It causes.Accordingly, setting detects temperature in it and gas flow in gas simulation system 1 temperature sensor and gas stream
Quantity sensor, for being accurately controlled to NOx ratio example.
In one specific embodiment of this case, the input terminal of spraying system 11, which is additionally provided with, heats the air of feeding
Electric heater 13, the front end of electric heater 13 is provided with the first filter 14 filtered the air and offer is supplied gas power
The first air blower 15.Aqueous solution of urea mixes with air to be sent into DOC10 and carries out reacting that, to meet DOC10ization
The needs for learning reaction, need to control the reaction temperature of aqueous solution of urea.The control of its temperature passes through the temperature tune to conveying air
Section is controlled, and is filtered by first filter 14 to input air on air delivery pipe road, and impurity in air is removed,
The conveying power of air is provided by the first air blower 15, the outlet air end of the first air blower 15 is connect with electric heater 13, air warp
Electric heater 13 mixes after heating with aqueous solution of urea.Temperature sensor is arranged in the outlet air end of electric heater 13, for controlling out
Air temperature.
In one specific embodiment of this case, DOC10 includes the multiple of arranged in series.Aqueous solution of urea is urged through DOC10 oxidation
After change, NOx gas is discharged, for the abundant reaction to aqueous solution of urea, with the gas for the NOx concentration that obtains meeting the requirements, can go here and there
Connection arranges multiple DOC10, so that the aqueous solution of urea being sent into sufficiently reacts, generates sufficient concentrations of NOx gas.
In one specific embodiment of this case, tail gas simulation system 2 includes fuel injector 21 and blows to fuel injector
The burner 22 to burn to fuel oil is arranged in the tonifying Qi pipeline of air, the ejection end of fuel injector 21.Tail gas simulation system 2
To generate high-temperature tail gas, by 22 non-combusted fuels of burner, the fuel injector 21 that is fed through of fuel oil spurts into fuel oil spray
In emitter 22, in 21 course of injection of fuel injector, is synchronized by tonifying Qi pipeline and blow air, pass through the control of fuel oil and AIR Proportional
System, meets the proportion requirement of fuel oil and air in burner 22.
In one specific embodiment of this case, the combustion to mixing air is additionally provided between fuel injector 21 and burner 22
Oil carries out preheating pre-heater 23.Fuel oil mixes with air, and needs to improve penetrating fuel oil in burner 22 if necessary
Pre-heater 23, fuel oil and air is arranged by the ejection end in fuel injector 21 to reduce the burning difficulty of fuel oil in temperature
After mixing, it is sent into burner 22 after heating by pre-heater 23, the temperature of air in burner 22 is entered by improving, is improved
The delivery temperature of burner 22, so that the delivery temperature of burner 22 meets the actual condition of engine as far as possible.
In one specific embodiment of this case, blowdown pipe road is provided with the second filter 24 filtered the air and the
Two air blowers 25.Air is sent into burner 22, the sky of 24 pairs of the second filter feedings of blowdown pipe road setting after mixing with fuel oil
Gas is filtered, and is provided the feeding speed of air by the second air blower 25 and is sent into pressure, meets the ratio that fuel oil mixes with air
Example and wind speed requirement.Due to the tail gas delivery temperature of burner 22 to be controlled.Temperature is respectively provided in the front-end and back-end of burner 22
Sensor and flow sensor are spent, the temperature sensor and flow sensor between burner 22 and pre-heater 23 are to detect
It is sent into temperature and traffic requirement that fuel oil mixes with air gas.The temperature sensor and flow sensor of 22 rear end of burner to
Monitor the temperature requirement of burner exhaust.
In one specific embodiment of this case, it is provided on gas exhaust manifold 102 to tail gas such as its inner exhaust gas supplement HC, CO
The heater 104 of vapor in the minimum gas gas cylinder 103 and make-up gas discharge line of ingredient.It is arranged in tail gas simulation system 2
High-temperature tail gas out after mixing in gas exhaust manifold with the NOx being discharged in gas simulation system 1, is sent into after-treatment system
Exhaust gas composition analysis is carried out, in order to enable the component of the high-temperature tail gas in gas exhaust manifold 102 simulates true bavin as far as possible
Oil machine exhaust components supplement the exhaust gas components such as necessary HC, CO by minimum gas gas cylinder 103, increase tail by humidifier 104
Water vapour content in gas, with closer diesel engine actual exhaust gas at isloation state.
Gas component and temperature and humidity on gas exhaust manifold 102 can be measured, tail by temperature sensor, flow sensor
The variation of temperature degree, flow signal reversely can be modified adjusting to the oil spout of oil burner and air inflow, be finally reached post-processing
Temperature required for system endurance test and space velocities.
In one specific embodiment of this case, exhaust gas analysis system 3 includes urea injection system 31, after-treatment system 32, and
The sampling system 34 and tail gas test macro 35 that exhaust gas component and content after handling 32 to after-treatment system are analyzed.After
For reason system 32 by taking SCR aftertreatment system as an example, high-temperature tail gas is sent into SCR aftertreatment system front end, urine by gas exhaust manifold 102
Plain spraying system 31 sprays the urea of predetermined urea amount into high-temperature tail gas, after urea enters SCR after mixing with high-temperature tail gas
Reason system 32 reacts in SCR aftertreatment system 32, and the high-temperature tail gas after reaction is sent into sampling system 34 and is sampled,
After tail gas test macro 35 measures the various compositions such as the ingredient of NOx in it and content, after calculating acquisition SCR
Transformation efficiency of the reason system 32 to NOx.
Certain after-treatment system can be changed to the after-treatment system of other components in measurement tail gas according to test requirements document,
To improve the applicability to diesel engine post-processing system performance measurement.
Preferably, tail gas test macro 35 is FTIR tail gas test macro (FTIR, Fourier Transform
Infrared spectroscopy fourier converts infrared spectrum analyzer).
In one specific embodiment of this case, the second mixer is also set up between urea injection system 31 and after-treatment system 32
33.In order to guarantee that NOx is sufficiently mixed with urea, maximum transformation efficiency is obtained in SCR aftertreatment system 32, is sprayed in urea
Second mixer 33 is set between system 31 and after-treatment system 32, after being sufficiently mixed atomization in the second mixer 33, is entered
SCR aftertreatment system reaction.
Compared to complicated diesel engine bench system, simulator stand is easy to use, easy to operate, and test effect can be improved
Rate.Diesel engine is simulated by burner combustion fuel oil and generates high-temp waste gas, reduces energy consumption.It can by gas simulation system
Each exhaust gas component content such as NOx, maintains test stability and consistency in continual and steady control tail gas.By being simulated in gas
Delivery temperature and flow are controlled by temperature sensor and flow sensor in system and tail gas simulation system, can get
Broader test section can more fully examine the after-treatment systems such as SCR, realize complete to its Performance And Reliability
The examination in face.
It is simulated by burner and generates diesel engine high-temp waste gas, generated the ammonia sprayed in system oxidation surely by DOC
Fixed enough NOx gas, cooperates the accurate control to tail gas, flow, and accurate diesel engine vent gas condition of simulating carries out the rear places such as SCR
Manage the test evaluation work of system performance and reliability.
The foregoing description of the disclosed embodiments can be realized professional and technical personnel in the field or using originally practical new
Type.Various modifications to these embodiments will be readily apparent to those skilled in the art, and determine herein
The General Principle of justice can be realized in other embodiments without departing from the spirit or scope of the present utility model.Cause
This, the present invention will not be limited to the embodiments shown herein, and is to fit to and principles disclosed herein
The widest scope consistent with features of novelty.
Claims (10)
1. a kind of diesel engine post-processing system endurance test platform, which is characterized in that the gas including generating NOx gas simulates system
System, simulation diesel engine fuel oil burn and discharge the tail gas simulation system of high-temperature tail gas, are connected to the gas simulation system and described
The gas exhaust manifold of tail gas simulation system, and to the gas componant and the tail that measures of content in the gas exhaust manifold
Gas analysis system.
2. diesel engine post-processing system endurance test platform according to claim 1, which is characterized in that the gas simulation
System includes the spraying system for spraying into aqueous solution of urea；
It is set to the output end of the spraying system, the mixer of mixing urea aqueous solution and air；
It is set to the output end of the mixer, decomposes the DOC of mixed aqueous solution of urea.
3. diesel engine post-processing system endurance test platform according to claim 2, which is characterized in that the spraying system
Input terminal be additionally provided with the electric heater heated to the air of feeding, the front end of the electric heater is provided with to air
The first filter being filtered, and the first air blower of power of supplying gas is provided.
4. diesel engine post-processing system endurance test platform according to claim 2, which is characterized in that the DOC includes
Arranged in series it is multiple.
5. diesel engine post-processing system endurance test platform according to claim 1, which is characterized in that the tail gas simulation
System includes fuel injector and blows the tonifying Qi pipeline of air, the ejection end of the fuel injector to the fuel injector
The burner to burn to fuel oil is set.
6. diesel engine post-processing system endurance test platform according to claim 5, which is characterized in that the fuel oil injection
It is additionally provided between device and the burner and preheating pre-heater is carried out to the fuel oil of mixing air.
7. diesel engine post-processing system endurance test platform according to claim 5, which is characterized in that the tonifying Qi pipeline
On be provided with the second filter and the second air blower filtered the air.
8. diesel engine post-processing system endurance test platform according to claim 1, which is characterized in that the gas discharge
The minimum gas gas cylinder to its inner exhaust gas supplement HC, CO exhaust gas component, and the supplement gas exhaust manifold are provided on pipeline
The heater of interior vapor.
9. diesel engine post-processing system endurance test platform according to claim 1, which is characterized in that the tails assay
System includes urea injection system, after-treatment system, and is carried out to the after-treatment system treated exhaust gas component and content
The sampling system and FTIR tail gas test macro of analysis.
10. diesel engine post-processing system endurance test platform according to claim 9, which is characterized in that the urea spray
It penetrates between system and the after-treatment system and also sets up the second mixer.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201721884101.5U CN208520587U (en) | 2017-12-28 | 2017-12-28 | Diesel engine post-processing system endurance test platform |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110595815A (en) * | 2019-09-18 | 2019-12-20 | 付华 | Diesel engine aftertreatment solid SCR system |
| CN110736622A (en) * | 2019-10-31 | 2020-01-31 | 中船动力研究院有限公司 | emission generation test device |
| CN113864031A (en) * | 2021-10-28 | 2021-12-31 | 威海海洋职业学院 | Vehicle tail gas simulation generating device |
-
2017
- 2017-12-28 CN CN201721884101.5U patent/CN208520587U/en active Active
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110595815A (en) * | 2019-09-18 | 2019-12-20 | 付华 | Diesel engine aftertreatment solid SCR system |
| CN110736622A (en) * | 2019-10-31 | 2020-01-31 | 中船动力研究院有限公司 | emission generation test device |
| CN113864031A (en) * | 2021-10-28 | 2021-12-31 | 威海海洋职业学院 | Vehicle tail gas simulation generating device |
| CN113864031B (en) * | 2021-10-28 | 2023-03-14 | 威海海洋职业学院 | Vehicle tail gas simulation generating device |
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