CN115077880A - Tail gas simulation generator for rapid aging test of diesel vehicle tail gas catalytic converter and simulation method thereof - Google Patents
Tail gas simulation generator for rapid aging test of diesel vehicle tail gas catalytic converter and simulation method thereof Download PDFInfo
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Abstract
The invention discloses a tail gas simulation generator for a rapid aging test of a diesel automobile tail gas catalytic converter and a simulation method thereof, and belongs to the technical field of tail gas simulation combustors. And S1, starting the main variable frequency fan to inject air into the air heat exchanger, measuring the flow rate of the injected air through a flowmeter, S2, generating ash content in tail gas in the combustion chamber, and sending the simulated tail gas containing the ash content into the main gas pipe. According to the invention, the tail gas source is generated through the simulated combustion of the mixed gas, the real exhaust of an engine is not needed, the change conditions of tail gas components, temperature, flow, vibration and the like meeting the requirements of various evaluation standards are provided for a test platform, the rapid aging test of the catalytic converter of the diesel vehicle can be carried out, the aging test conditions can be repeatedly reproduced, various test combination modes can be selected according to the test requirements, the test time can be saved, and meanwhile, the control of the tail gas components is more accurate and measurable.
Description
Technical Field
The invention relates to the technical field of tail gas simulation combustors, in particular to a tail gas simulation generator for a rapid aging test of a diesel automobile tail gas catalytic converter and a simulation method thereof.
Background
With the development of global economy, the automotive industry has gained rapid growth. In recent years, the number of cars worldwide has increased at an alarming rate. The pollution of the air by the huge number of cars is conceivable.
At present, the main energy for the motor vehicle is the combustion of fossil fuel (such as gasoline, diesel oil and alternative fuel such as CNG, LPG, methanol, ethanol and the like), the discharged pollutants become the main source of air pollution, the occupied proportion is increasing day by day, and after long-term accumulation, the harmful tail gas of the automobile has presented enough concentration at present, and the pollution of the initial local area is developed into global pollution, which jeopardizes the comfort and health of human body and seriously jeopardizes the ecological environment.
The main body of the exhaust of the automobile engine is harmless, but harmful exhaust emissions such as CO, HC and NO and a small amount of sulfides such as SO and H2S can be generated due to the influence of the operation condition and the combustion process, and compared with a gasoline engine, the diesel engine can also generate a large amount of easily suspended particles with the diameter of less than 2 microns, SO that a condensation core is easily formed, cloud and rain are increased, the health of a respiratory system is directly threatened, and the climate is indirectly influenced. The catalytic converter of the tail gas, which is a main component of automobile tail gas pollutants due to large emission of CO, NO and HC, plays an important role in reducing the tail gas pollution of motor vehicles, and the performance evaluation of the catalytic converter is performed by laboratory sample, bench evaluation and whole automobile evaluation methods, wherein the bench evaluation is the most important part in the whole evaluation system. At present, the tail gas source adopted by the domestic rack evaluation system is the real exhaust of the engine, the exhaust temperature, the flow and the tail gas components of the system are difficult to form consistent and reproducible test conditions, the consistency premise of quality screening of the catalytic converter is influenced, and meanwhile, in the evaluation, the synchronous proceeding of various detections cannot be realized, the time can be consumed, and the requirements of users are difficult to meet.
Disclosure of Invention
1. Technical problem to be solved
Aiming at the problems in the prior art, the invention aims to generate an exhaust source through the simulated combustion of mixed gas, does not need to adopt the real exhaust of an engine, provides a test platform with the change conditions of exhaust components, temperature, flow, vibration and the like meeting the requirements of various evaluation standards, can perform the rapid aging test of the catalytic converter of the diesel vehicle, can repeatedly reproduce the aging test conditions, can select various test combination modes according to the test requirements, and can save the test time.
2. Technical scheme
In order to solve the problems, the invention adopts the following technical scheme:
the quick ageing test of diesel vehicle tail gas catalytic converter is with tail gas analog generator includes:
the air heat exchanger, air heat exchanger's air inlet is installed main frequency conversion fan through the tuber pipe, install the main flowmeter on the tuber pipe, air heat exchanger's air inlet intercommunication is provided with the combustion chamber.
The air inlet end of the main air pipe is connected with an air outlet of the air heat exchanger, a main air valve is installed on the main air pipe, a double-way air pipe is installed at the air outlet end of the main air pipe, air pipe valves are installed on two pipelines of the double-way air pipe, and a test pipe is installed at the outlet end of the double-way air pipe.
The air cylinder is installed at the air inlet end of the first conveying pipe, a hydrocarbon pipe is arranged on the first conveying pipe in a communicated mode, a hydrocarbon flow valve is installed on the hydrocarbon pipe, a hydrocarbon flow meter and a hydrocarbon control valve are installed on the first conveying pipe, the hydrocarbon flow meter and the hydrocarbon control valve are distributed on two sides of the hydrocarbon pipe, a first heater is arranged on the first conveying pipe in a communicated mode and located between the air cylinder and the hydrocarbon flow meter, and a first auxiliary variable frequency fan is installed at an air inlet of the first heater.
The outlet end of the second conveying pipe is communicated with the main gas pipe, a reaction pipe is installed at a gas inlet of the second conveying pipe, an NO detection pipe is communicated and arranged on the second conveying pipe, and NO is installed on the NO detection pipe x A flow valve, the second delivery pipe is provided with NO x Control valve and NO x Flow meter of said NO x Control valve and NO x Flow meterThe two sides of the NO detection tube are respectively positioned, the second conveying tube is communicated with a second heater, and a second auxiliary variable frequency fan is installed at the air inlet of the second heater.
As a further scheme of the invention: the gas analyzer is provided with three gas analyzers.
The simulation method of the tail gas simulation generator for the rapid aging test of the diesel automobile tail gas catalytic converter comprises the following steps of:
s1, starting the main variable frequency fan to inject air into the air heat exchanger, and measuring the flow rate of the injected air through the main flow meter;
s2, generating ash content in the tail gas in the combustion chamber, and sending the simulated tail gas containing the ash content into the main gas pipe;
s3, feeding hydrocarbon into the main gas pipe;
s4, adding NO x Feeding into a main gas pipe;
s5, ash content, hydrocarbon and NO in mixed tail gas x Forming simulated mixed tail gas, and adjusting the temperature of the mixed tail gas;
and S6, analyzing the exhaust tail gas by using a gas analyzer.
As a further scheme of the invention: in the step S2, the method for generating ash in the tail gas in the combustion chamber is as follows:
injecting engine oil into the combustion chamber; and fuel is injected into the combustion chamber, the engine oil and the fuel are ignited, tail gas containing ash is generated in the combustion chamber, and the tail gas enters the main air pipe.
As a further scheme of the invention: the fuel is diesel oil.
As a further scheme of the invention: in step S3, the method for feeding hydrocarbon into the main gas pipe is:
opening a gas cylinder storing hydrocarbon, and opening a first auxiliary variable frequency fan and a first heater; and starting a hydrocarbon flow meter, adjusting the flow of the hydrocarbon into the main gas pipe, and feeding the hydrocarbon into the main gas pipe.
As the invention proceedsThe one-step scheme comprises the following steps: in the step S4, NO is added x The method for feeding the gas into the main gas pipe comprises the following steps:
adding ammonia water into the reaction tube, introducing oxygen, and simultaneously adding an oxidative catalyst to generate NO and NO in tail gas 2 (ii) a Starting a second auxiliary variable frequency fan and a second heater; mixing NO with NO 2 By NO x The control valve is fed into the main gas pipe.
As a further scheme of the invention: and when the ammonia water is added, controlling the adding amount of the ammonia water through a second control valve.
As a further scheme of the invention: when the oxygen is introduced, the addition amount of the oxygen is controlled by using a third control valve.
As a further scheme of the invention: in step S5, the mixed gas is fed into the test tube by using a two-way gas pipe pair, and a heat exchanger is disposed on one of the gas feed pipes.
3. Advantageous effects
Compared with the prior art, the invention has the advantages that:
the invention generates the tail gas source by the simulated combustion of the mixed gas, does not need to adopt the real exhaust of an engine, provides the test platform with the change conditions of tail gas components, temperature, flow, vibration and the like which meet the requirements of various evaluation standards, can carry out rapid aging test of the catalytic converter of the diesel vehicle, the aging test condition can be repeatedly reproduced, simultaneously, various test combination modes can be selected according to the test requirements, namely, the performance of dpf module (ash removal) corresponding to ash content and the performance of DOC/SCr/asx linkage module (nitrogen removal) corresponding to NO are detected simultaneously, different combinations of tests can be synchronously and separately carried out, the test time can be saved, meanwhile, clean hot air is directly mixed with tail gas components, the temperature of the tail gas is controlled only by the action of the combustion chamber, the complex combustion process is avoided by controlling the components of the tail gas, and the control of the components of the tail gas is more accurate and measurable.
Drawings
FIG. 1 is a schematic structural diagram of an exhaust simulation generator for a rapid aging test of a diesel vehicle exhaust catalytic converter according to an embodiment of the invention;
fig. 2 is a flowchart of a simulation method of an exhaust simulation generator for a rapid aging test of a diesel vehicle exhaust catalytic converter according to an embodiment of the present invention.
In the figure: 1. a main frequency conversion fan; 2. a primary flow meter; 3. a combustion chamber; 4. a gas cylinder; 5. a first heater; 6. a first auxiliary variable frequency fan; 7. a NO detection tube; 8. a hydrocarbon flow meter; 9. a hydrocarbon pipe; 10. a hydrocarbon flow valve; 11. a main air valve; 12. a main air pipe; 13. a double-path air pipe; 14. a cold-heat exchanger; 15. a hydrocarbon control valve; 16. a gas analyzer; 17. a test tube; 18. a reaction tube; 19. a second auxiliary variable frequency fan; 20. a second heater; 21. NO x A flow meter; 22. NO x A control valve; 23. NO x A flow valve; 24. an air heat exchanger.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention; it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all embodiments, and all other embodiments obtained by those skilled in the art without any inventive work are within the scope of the present invention.
In the description of the present invention, it should be noted that the terms "upper", "lower", "inner", "outer", "top/bottom", and the like indicate orientations or positional relationships based on those shown in the drawings, and are only for convenience of description and simplification of description, but do not indicate or imply that the referred device or element must have a specific orientation, be constructed in a specific orientation, and be operated, and thus should not be construed as limiting the present invention. Furthermore, the terms "first," "second," and the like are used for descriptive purposes only and are not to be construed as indicating or implying relative importance.
In the description of the present invention, it should be noted that, unless otherwise explicitly specified or limited, the terms "mounted," "disposed," "sleeved/connected," "connected," and the like are to be construed broadly, e.g., "connected," which may be fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; the two components can be directly connected or indirectly connected through an intermediate medium, and the two components can be communicated with each other; the specific meanings of the above terms in the present invention can be understood in specific cases to those skilled in the art.
Example 1:
referring to fig. 1, the tail gas simulation generator for the rapid aging test of the diesel vehicle tail gas catalytic converter comprises:
an air heat exchanger 24, wherein a main variable frequency fan 1 is arranged at an air inlet of the air heat exchanger 24 through an air pipe, a main flow meter 2 is arranged on the air pipe, a combustion chamber 3 is arranged at the air inlet of the air heat exchanger 24 in a communicating manner, indirectly heated air and gas generated by the combustion chamber 3 pass through the air heat exchanger 24, so that the temperature of the air heat exchanger 24 is slightly higher than a target temperature, normal temperature air is changed into hot air through the air heat exchanger 24, the hot air is changed into a tail gas source which is similar to the running process of a real vehicle through an existing hydrocarbon and carbon oxygen compound generator, and the temperature of the tail gas can be controlled by adjusting the mixing ratio of cold gas and hot gas, thereby realize that clean hot-air is direct to mix with the tail gas component, the effect of combustion chamber 3 only improves controllable temperature for tail gas, and the control of tail gas composition has avoided complicated combustion process, and the control of tail gas composition is more accurate measurable.
The air conditioner comprises a main air pipe 12, wherein an air inlet end of the main air pipe 12 is connected with an air outlet of an air heat exchanger 24, a main air valve 11 is installed on the main air pipe 12, a double-way air pipe 13 is installed at an air outlet end of the main air pipe 12, air pipe valves are installed on two pipelines of the double-way air pipe 13, and a test pipe 17 is installed at an outlet end of the double-way air pipe 13.
The gas cylinder 4 is installed at the air inlet end of the first conveying pipe, a hydrocarbon pipe 9 is arranged on the first conveying pipe in a communicated mode, a hydrocarbon flow valve 10 is installed on the hydrocarbon pipe 9, a hydrocarbon flow meter 8 and a hydrocarbon control valve 15 are installed on the first conveying pipe, the hydrocarbon flow meter 8 and the hydrocarbon control valve 15 are distributed on two sides of the hydrocarbon pipe 9, a first heater 5 is arranged on the first conveying pipe in a communicated mode, the first heater 5 is located between the gas cylinder 4 and the hydrocarbon flow meter 8, and a first auxiliary variable frequency fan 6 is installed at the air inlet of the first heater 5.
The outlet end of the second conveying pipe is communicated with the main gas pipe 12, a reaction pipe 18 is installed at the gas inlet of the second conveying pipe, an NO detection pipe 7 is communicated and arranged on the second conveying pipe, and NO is installed on the NO detection pipe 7 x Flow valve 23, NO mounted on second delivery pipe x Control valve 22 and NO x Flow meter 21, NO x Control valve 22 and NO x The flow meters 21 are respectively positioned at two sides of the NO detection pipe 7, the second conveying pipe is communicated with a second heater 20, and a second auxiliary variable frequency fan 19 is installed at an air inlet of the second heater 20.
And the gas analyzer 16 is also included, and the gas analyzer 16 is provided with three in total.
Referring to fig. 2, the invention further provides a simulation method of the tail gas simulation generator for the rapid aging test of the diesel automobile tail gas catalytic converter, which comprises the following steps:
step one, starting a main variable frequency fan 1 to inject air into an air heat exchanger 24, and measuring the flow rate of the injected air through a main flow meter 2.
And step two, generating ash content in the tail gas in the combustion chamber 3, and sending the simulated tail gas containing the ash content into the main gas pipe 12.
The method of generating ash in the tail gas in the combustion chamber 3 is:
spraying engine oil into the combustion chamber 3; fuel is injected into the combustion chamber 3, engine oil and fuel are ignited, tail gas containing ash is generated in the combustion chamber 3, and the tail gas enters the main gas pipe 12.
Wherein the fuel is diesel.
And step three, sending hydrocarbon into the main gas pipe 12.
The method of feeding hydrocarbons into the main gas pipe 12 is:
starting a gas cylinder 4 storing hydrocarbon, and starting a first auxiliary variable frequency fan 6 and a first heater 5; the hydrocarbon flow meter 8 is activated to adjust the flow of hydrocarbons into the main gas line 12 and feed the hydrocarbons into the main gas line 12.
Step four, NO x Into the main gas pipe 12.
Adding NO x The method of feeding into the main gas pipe 12 is:
adding ammonia water and oxygen into the reaction tube 18, and adding an oxidative catalyst to generate NO and NO in the tail gas 2 (ii) a Starting a second auxiliary variable frequency fan 19 and a second heater 20; mixing NO with NO 2 By NO x Control valve 22 feeds into main gas pipe 12.
Wherein, when adding ammonia water, the adding amount of ammonia water is controlled, the catalyst is Pt, NO is further oxidized into NO through oxidizing catalyst (DOC) 2， Wherein DOC is Pt 0.8 Pd 0.2 /CeO 2 A catalyst,
when oxygen is introduced, the amount of oxygen added is controlled so as to control NO and NO 2 The ratio of (a) to (b).
Step five, mixing ash, hydrocarbon and NO in the tail gas x And forming simulated mixed tail gas, and adjusting the temperature of the mixed tail gas.
A double-way gas pipe 13 pair is adopted to feed mixed gas into a test pipe 17, and a cold-heat exchanger 14 is arranged on one gas feed pipe.
And sixthly, analyzing the discharged tail gas by using a gas analyzer 16.
Example 2:
the tail gas simulation generator for the rapid aging test of the diesel automobile tail gas catalytic converter and the simulation method thereof provided by the embodiment are substantially the same as those of the embodiment 1, and the main differences are as follows: the method is characterized in that the ash content corresponds to dpf module (ash removal) performance, the CH corresponding DOC module (oxidized hydrocarbon) performance and the NO corresponding DOC/SCr/asx linkage module (nitrogen removal) performance are synchronously and separately detected, and the method comprises the following steps:
step one, opening the main gas valve 11, closing the hydrocarbon control valve 15, and opening NO x The control valve 22 ignites the engine oil and the fuel, tail gas containing ash is generated in the combustion chamber 3, and the main frequency conversion fan 1 exchanges heat with airAir is injected into the device 24, the injected air flow is measured through the main flow meter 2, the simulation tail gas containing ash enters the main gas pipe 12, then enters the test pipe 17 through the cold heat exchanger 14 and the double-path gas pipe 13, and the performance of the dpf module (ash removal) corresponding to the ash is detected.
Step two, opening the gas cylinder 4 storing hydrocarbons, closing the hydrocarbon control valve 15, adjusting and controlling the hydrocarbon flow meter 8, and opening the first auxiliary variable frequency fan 6 and the first heater 5; and (3) opening a hydrocarbon flow valve 10, adjusting the flow and the temperature of the hydrocarbon, entering a hydrocarbon pipe 9, and detecting the performance of the DOC module (oxidized hydrocarbon) corresponding to the CH.
Step three, turning on NO x Flow valve 23, NO closure x Controlling the valve 22, adding ammonia water into the reaction tube 18, introducing oxygen, and simultaneously adding an oxidative catalyst to generate NO and NO in the tail gas 2 (ii) a Regulating NO x A flowmeter 21 for starting the second auxiliary variable frequency fan 19 and the second heater 20; NO (nitric oxide) x And (3) adjusting the temperature and the flow rate, entering the NO detection tube 7, and detecting the DOC/SCr/asx linkage module (denitrogenation) performance corresponding to NO.
In this embodiment, the ash content can be detected simultaneously for dpf module (ash removal) performance and the DOC/SCr/asx linkage module (nitrogen removal) performance corresponding to NO, and the detection can be performed separately, thereby saving time.
Example three:
the tail gas simulation generator for the rapid aging test of the diesel automobile tail gas catalytic converter and the simulation method thereof provided by the embodiment are substantially the same as those of the embodiment 1, and the main differences are as follows: and detecting the performance of a dpf module (ash removal) corresponding to ash and the performance of a DOC module (hydrocarbon oxide) corresponding to CH, and synchronously and independently detecting the performance of a DOC/SCR/asx linkage module (nitrogen removal) corresponding to NO.
Step one, opening the main gas valve 11, closing the hydrocarbon control valve 15 and NO x A control valve 22 is used for igniting engine oil and fuel, tail gas containing ash is generated in the combustion chamber 3, the main frequency conversion fan 1 injects air into an air heat exchanger 24, the flow rate of the injected air is measured through a main flow meter 2, and the simulated tail gas containing ash entersInto the main gas pipe 12.
Step two, opening the gas cylinder 4 storing hydrocarbon, opening the hydrocarbon control valve 15, adjusting the hydrocarbon flow meter 8, and opening the first auxiliary variable frequency fan 6 and the first heater 5; and (3) closing the hydrocarbon flow valve 10, enabling the hydrocarbon to enter the main gas pipe 12, mixing with the contained ash content simulation tail gas, and enabling the mixture to enter the test pipe 17 through the cold heat exchanger 14 and the double-way gas pipe 13, wherein the ash content corresponds to dpf module (ash removal) performance and the DOC module (hydrocarbon oxidation) performance corresponding to CH for detection.
Step three, turning on NO x Flow valve 23, NO closure x Controlling the valve 22, adding ammonia water into the reaction tube 18, introducing oxygen, and simultaneously adding an oxidative catalyst to generate NO and NO in the tail gas 2 (ii) a Regulating NO x A flowmeter 21 for starting the second auxiliary variable frequency fan 19 and the second heater 20; and detecting the DOC/SCR/asx linkage module (denitrogenation) performance corresponding to NO.
In this embodiment, when the ash content is detected corresponding to the dpf module (ash removal) performance and the DOC module (oxidized hydrocarbon) performance corresponding to the CH, the DOC/SCr/asx linkage module (nitrogen removal) performance corresponding to the NO can be separately detected, so that the device is convenient to use and saves time.
According to the invention, a tail gas source is generated through simulated combustion of mixed gas, an engine does not need to be adopted for real exhaust, variable conditions such as tail gas components, temperature, flow, vibration and the like meeting various evaluation standard requirements are provided for a test platform, a rapid aging test of the diesel automobile catalytic converter can be carried out, aging test conditions can be repeatedly reproduced, and meanwhile, various test combination modes can be selected according to test requirements, namely, the performance of a dpf module (ash removal) corresponding to ash and the performance of a DOC/SCR/asx linkage module (nitrogen removal) corresponding to NO are simultaneously detected, different combined tests can be synchronously carried out in a separated mode, and the test time can be saved.
The above description is only for the preferred embodiment of the present invention, but the scope of the present invention is not limited thereto, and any person skilled in the art should be considered to be within the technical scope of the present invention, and the equivalent replacement or change according to the technical solution and the modified concept of the present invention should be covered by the scope of the present invention.
Claims (10)
1. Tail gas analogue generator is used in quick ageing test of diesel vehicle tail gas catalytic converter, its characterized in that includes:
the air inlet of the air heat exchanger (24) is provided with a main frequency conversion fan (1) through an air pipe, the air pipe is provided with a main flow meter (2), and the air inlet of the air heat exchanger (24) is communicated with a combustion chamber (3);
the air inlet end of the main air pipe (12) is connected with an air outlet of the air heat exchanger (24), a main air valve (11) is installed on the main air pipe (12), a double-path air pipe (13) is installed at the air outlet end of the main air pipe (12), air pipe valves are installed on two paths of pipelines of the double-path air pipe (13), and a test pipe (17) is installed at the outlet end of the double-path air pipe (13);
the gas-liquid separation device comprises a first conveying pipe, wherein the outlet end of the first conveying pipe is communicated with a main gas pipe (12), a gas cylinder (4) is installed at the gas inlet end of the first conveying pipe, a hydrocarbon pipe (9) is arranged on the first conveying pipe in a communicated mode, a hydrocarbon flow valve (10) is installed on the hydrocarbon pipe (9), a hydrocarbon flow meter (8) and a hydrocarbon control valve (15) are installed on the first conveying pipe, the hydrocarbon flow meter (8) and the hydrocarbon control valve (15) are distributed on two sides of the hydrocarbon pipe (9), a first heater (5) is arranged on the first conveying pipe in a communicated mode, the first heater (5) is located between the gas cylinder (4) and the hydrocarbon flow meter (8), and a first auxiliary variable frequency fan (6) is installed at the gas inlet of the first heater (5);
the second conveyer pipe, the exit end and the main trachea (12) intercommunication of second conveyer pipe, reaction tube (18) are installed to the air inlet of second conveyer pipe, the intercommunication is provided with NO detecting tube (7) on the second conveyer pipe, install NO on NO detecting tube (7) x A flow valve (23), NO is installed on the second conveying pipe x Control valve (22) and NO x A flow meter (21), said NO x Control valve (22) and NO x The flowmeters (21) are respectively positioned at the NO detectionAnd two sides of the measuring pipe (7) are communicated with a second heater (20) on the second conveying pipe, and a second auxiliary variable frequency fan (19) is installed at the air inlet of the second heater (20).
2. The tail gas simulation generator for the rapid aging test of the diesel automobile tail gas catalytic converter according to claim 1, characterized by further comprising three gas analyzers (16), wherein the three gas analyzers (16) are arranged.
3. The simulation method of the exhaust simulation generator for the rapid aging test of the diesel automobile exhaust catalytic converter is characterized in that the exhaust simulation generator for the rapid aging test of the diesel automobile exhaust catalytic converter according to any one of claims 1 to 2 is used, and comprises the following steps:
s1, starting a main frequency conversion fan (1) to inject air into an air heat exchanger (24), and measuring the flow rate of the injected air through a main flow meter (2);
s2, generating ash content in the tail gas in the combustion chamber (3), and sending the simulated tail gas containing the ash content into the main gas pipe (12);
s3, feeding hydrocarbon into the main gas pipe (12);
s4, mixing NO x Feeding into a main gas pipe (12);
s5, ash, hydrocarbon and NO in mixed tail gas x Forming simulated mixed tail gas, and adjusting the temperature of the mixed tail gas;
and S6, analyzing the exhaust tail gas by using a gas analyzer (16).
4. The method for simulating an exhaust gas simulation generator for a rapid aging test of a diesel automobile exhaust catalytic converter according to claim 3, wherein in the step S2, the method for generating ash in the exhaust gas in the combustion chamber (3) comprises:
spraying engine oil into the combustion chamber (3); fuel is injected into the combustion chamber (3) to ignite the engine oil and the fuel, tail gas containing ash is generated in the combustion chamber (3), and the tail gas enters the main gas pipe (12).
5. The method for simulating an exhaust gas simulation generator for a rapid aging test of a diesel automobile exhaust catalytic converter according to claim 4, wherein the fuel is diesel.
6. The simulation method of an exhaust gas simulation generator for a rapid aging test of a diesel automobile exhaust catalytic converter according to claim 3, wherein the method of feeding the hydrocarbon into the main gas pipe (12) in the step S3 is:
opening a gas cylinder (4) storing hydrocarbon, and opening a first auxiliary variable frequency fan (6) and a first heater (5); the hydrocarbon flow meter (8) is activated to adjust the flow of hydrocarbons into the main gas pipe (12) and feed the hydrocarbons into the main gas pipe (12).
7. The method of claim 3, wherein in step S4, NO is added to the simulation of the exhaust simulation generator for rapid aging test of the catalytic converter for diesel vehicles x The method of feeding into the main gas pipe (12) is as follows:
ammonia water is added into the reaction tube (18), oxygen is introduced, and meanwhile, an oxidizing catalyst is added to generate NO and NO in tail gas 2 (ii) a Starting a second auxiliary variable frequency fan (19) and a second heater (20); mixing NO with NO 2 By NO x The control valve (22) is fed into the main gas pipe (12).
8. The method of claim 7, wherein the amount of ammonia added is controlled during the ammonia addition.
9. The method for simulating an exhaust gas simulation generator for a rapid aging test of a diesel automobile exhaust catalytic converter according to claim 7, wherein the amount of oxygen added is controlled while oxygen is introduced.
10. The method of claim 3, wherein in step S5, a two-way pipe (13) is used to feed the mixed gas into the test pipe (17), and a cold-heat exchanger (14) is disposed on one of the feed pipes.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210518431.1A CN115077880A (en) | 2022-05-12 | 2022-05-12 | Tail gas simulation generator for rapid aging test of diesel vehicle tail gas catalytic converter and simulation method thereof |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210518431.1A CN115077880A (en) | 2022-05-12 | 2022-05-12 | Tail gas simulation generator for rapid aging test of diesel vehicle tail gas catalytic converter and simulation method thereof |
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| CN115077880A true CN115077880A (en) | 2022-09-20 |
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