CN113670379A - Tail gas pollutant emission simulation device and method - Google Patents
Tail gas pollutant emission simulation device and method Download PDFInfo
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- 239000003344 environmental pollutant Substances 0.000 title claims abstract description 42
- 231100000719 pollutant Toxicity 0.000 title claims abstract description 42
- 238000000034 method Methods 0.000 title claims abstract description 23
- 238000004088 simulation Methods 0.000 title abstract description 23
- 239000007789 gas Substances 0.000 claims abstract description 264
- 238000010438 heat treatment Methods 0.000 claims abstract description 56
- 230000000087 stabilizing effect Effects 0.000 claims abstract description 41
- 230000001105 regulatory effect Effects 0.000 claims abstract description 23
- 238000005259 measurement Methods 0.000 claims description 17
- 230000001276 controlling effect Effects 0.000 claims description 10
- 239000000203 mixture Substances 0.000 claims description 10
- 238000002474 experimental method Methods 0.000 claims description 9
- 239000003595 mist Substances 0.000 claims description 6
- 238000012360 testing method Methods 0.000 claims description 6
- 238000000746 purification Methods 0.000 abstract description 6
- 238000001514 detection method Methods 0.000 abstract description 5
- 238000005086 pumping Methods 0.000 abstract 1
- 238000011161 development Methods 0.000 description 4
- 238000011160 research Methods 0.000 description 2
- 238000009530 blood pressure measurement Methods 0.000 description 1
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- 238000010586 diagram Methods 0.000 description 1
- 239000003085 diluting agent Substances 0.000 description 1
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- G—PHYSICS
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- G01D—MEASURING NOT SPECIALLY ADAPTED FOR A SPECIFIC VARIABLE; ARRANGEMENTS FOR MEASURING TWO OR MORE VARIABLES NOT COVERED IN A SINGLE OTHER SUBCLASS; TARIFF METERING APPARATUS; MEASURING OR TESTING NOT OTHERWISE PROVIDED FOR
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- G01N1/28—Preparing specimens for investigation including physical details of (bio-)chemical methods covered elsewhere, e.g. G01N33/50, C12Q
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
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- G01N1/28—Preparing specimens for investigation including physical details of (bio-)chemical methods covered elsewhere, e.g. G01N33/50, C12Q
- G01N1/38—Diluting, dispersing or mixing samples
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
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Abstract
The invention relates to a tail gas pollutant discharge simulation device and a method, which comprises a gas supply system, a pressure stabilizing system, a flow regulating system, a heating system, a gas measuring system and a control system, wherein the control system controls the gas supply system to prepare initial mixed gas, the pressure stabilizing system is used for stabilizing the initial mixed gas to obtain the pressure-stabilized mixed gas, the flow regulating system is used for pumping the pressure-stabilized mixed gas into the heating system according to a set flow rate, the temperature of the pressure-stabilized mixed gas is heated to a temperature required to be simulated to obtain the heated mixed gas, the gas measuring system is used for detecting various indexes of the heated mixed gas simulated each time, the control system adjusts the operating conditions of other systems in real time according to the detection result, and accurately controls and simulates various indexes of tail gas so as to ensure that different pressures, exhaust gas pressures and gases emitted under different operating conditions can be simulated, The tail gas pollutants under different temperatures provide experimental conditions for developing tail gas emission purification devices and the like.
Description
Technical Field
The invention relates to the technical field of tail gas simulation, in particular to a tail gas pollutant emission simulation device and method.
Background
At present, the quantity of motor vehicles in China continuously rises, the exhaust emission is greatly increased, and in order to respond to the policy of blue sky defense war, not only novel fuel and new energy vehicles need to be developed, but also the problem of motor vehicle exhaust emission needs to be fundamentally solved. In order to research the exhaust emission characteristics, if the exhaust emission characteristics are completely based on the vehicle, the engine is always in a working state, the surrounding environment is polluted, the emission-related test period is long, the cost is high, and the emission result controllability is poor due to uncontrollable factors such as overstrain work and the like of the engine, and experimental conditions can be provided for research, development and test of the motor vehicle exhaust purification device by simulating the emission of pollutants in the motor vehicle exhaust. The invention patent CN102749378A adopts a standard gas control unit, selects standard gas with different concentrations according to different working conditions to simulate the tail gas environment of an automobile under various working conditions; utility model patent CN211122510U disposes tail gas according to the standard requirement through the emission that control standard gas device and diluent gas device are connected, and content, the proportion of tail gas can dispose as required, satisfy the tail gas of different standards, adapt to different tail gas measurement standard.
The existing patents only consider the problems of tail gas concentration, content and proportion, and are not comprehensive. For example, in the development of an exhaust gas purification device, the temperature of exhaust gas discharged by a real vehicle needs to be considered, and only normal temperature is simulated in the prior art. In addition, the temperature difference of the tail gas discharged by the gasoline engine and the diesel engine is large, and the temperature of the tail gas of the diesel engine is much higher.
Therefore, there is a need to develop an exhaust emission simulation apparatus and method capable of simulating the components, concentration, temperature and pressure of each pollutant in the exhaust of the motor vehicle, so as to provide experimental conditions for developing an exhaust emission purification apparatus.
Disclosure of Invention
The invention aims to provide a tail gas pollutant discharge simulation device and a tail gas pollutant discharge simulation method, and solves the problem that in the existing tail gas discharge simulation process, simulation tail gases at different temperatures and pressures cannot be simulated, so that the experimental result is inconsistent with the actual result.
In order to achieve the purpose, the invention provides the following scheme:
an exhaust pollutant emission simulation device, comprising:
the gas supply system is used for providing initial mixed gas for simulating tail gas;
the pressure stabilizing system is connected with the gas supply system and is used for stabilizing the pressure of the initial mixed gas to obtain a pressure-stabilized mixed gas;
the flow regulating system is connected with the pressure stabilizing system and is used for extracting the pressure stabilizing mixed gas from the pressure stabilizing system;
the heating system is connected with the flow regulating system and is used for heating the temperature of the pressure-stabilizing mixed gas to the temperature required by the simulated tail gas to obtain heated mixed gas;
the gas measurement system is connected with the heating system and is used for detecting the flow, the component concentration, the temperature and the pressure of the heated mixed gas;
control system, with gas supply system the steady voltage system the flow control system the heating system and gas measurement system connects, is used for according to right the testing result of heating mist's flow, composition concentration, temperature and pressure, control gas supply system the steady voltage system the flow control system with heating system's operating condition, until the testing result of each item index of heating mist reaches and can carry out subsequent requirement like experiments such as development exhaust emission purifier.
Optionally, the gas supply system and the pressure stabilizing system, the pressure stabilizing system and the flow regulating system, the flow regulating system and the heating system, and the heating system and the gas measuring system are connected through connecting pipelines.
Optionally, the gas supply system includes: n is a radical of2Gas cylinder, NO2Gas cylinder, CO2Gas cylinder, CO gas cylinder, HC gas cylinder, NO gas cylinder and O2A gas cylinder; the outlet of each gas cylinder is provided with a pressure reducing valve and an electromagnetic valve;
the pressure reducing valve is connected with the control system and is used for reducing the pressure of the gas flowing through and stabilizing the pressure to a fixed value, and the outlet pressure is automatically kept stable by means of the energy of the gas cylinder;
and the electromagnetic valve is connected with the control system and is used for adjusting the direction, the flow and the speed of the gas flowing through.
Optionally, the flow rate adjusting system includes a variable frequency motor and a fan, the fan is connected to the variable frequency motor, the variable frequency motor is connected to the control system, and the variable frequency motor is used to drive the fan to operate.
Optionally, the heating system adopts an electric heater, and the electric heater is connected with the control system and used for heating the pressure-stabilizing mixed gas.
Optionally, the gas measurement system comprises:
the flow measurement unit is connected with the control system and used for detecting the flow of the heated mixed gas;
the component measuring unit is connected with the control system and used for detecting the concentration of each component in the heated mixed gas;
the temperature measuring unit is connected with the control system and used for detecting the temperature of the heated mixed gas;
and the pressure measuring unit is connected with the control system and used for detecting the pressure of the heating mixed gas.
Optionally, the component measuring unit includes: n is a radical of2Sensor, NO2Sensor, CO2Sensor, CO sensor, HC sensor, NO sensor, and O2Sensors for detecting N in the heated mixed gas respectively2、NO2、CO2CO, HC, NO and O2The concentration of the gas.
The invention also provides a tail gas pollutant emission simulation method, which comprises the following steps:
according to the input information and the set value of the operating condition of the simulated vehicle, an initial mixed gas is produced by using a gas supply system;
stabilizing the air pressure of the initial mixed gas by using a pressure stabilizing system to obtain a pressure-stabilized mixed gas;
controlling a flow regulating system to extract the pressure-stabilizing mixed gas from the pressure-stabilizing system to a heating system;
controlling the heating system to heat the pressure-stabilizing mixed gas to obtain a heated mixed gas;
measuring the flow, the composition, the temperature and the pressure of the heated mixed gas by using a gas measuring system;
judging whether the flow, the composition, the temperature and the pressure of the heated mixed gas meet the mixed gas requirement to be simulated or not;
if the requirements are not met, the operation parameters of each system are readjusted, and the process of simulating the exhaust pollutant emission is performed again;
if the requirements are met, the generated heated mixed gas is used as a tail gas pollutant for relevant experiments.
Optionally, according to the input information and the set value of the operating condition of the simulated vehicle, the method further comprises the following steps before the mixed gas is produced by the gas supply system:
receiving set input information of the simulated vehicle;
and receiving the set running condition of the simulated vehicle.
Optionally, the making of the initial mixed gas by using the gas supply system includes:
and controlling a pressure reducing valve and an electromagnetic valve of each gas cylinder of the gas supply system, adjusting the concentration and the pressure of each gas component to obtain initial mixed gas, and transmitting the initial mixed gas to the pressure stabilizing system through a connecting pipeline.
According to the specific embodiment provided by the invention, the invention discloses the following technical effects:
the invention provides a tail gas pollutant discharge simulation device and a method, which comprises a gas supply system, a pressure stabilizing system, a flow regulating system, a heating system, a gas measuring system and a control system, wherein the pressure stabilizing system is used for regulating the gas pressure of initial mixed gas, the heating system is also arranged behind the flow regulating system and can heat the temperature of the pressure-stabilized mixed gas to the temperature required to be simulated so as to ensure that tail gas pollutants discharged under different pressures and different temperatures under different working conditions can be simulated, the gas measuring system is used for detecting the simulated tail gas pollutants, and the control system is used for adjusting the running working conditions of other systems in real time according to the detection result so as to accurately control the indexes of the simulated different tail gas pollutants.
As an alternative scheme of the invention, a pressure reducing valve and an electromagnetic valve are correspondingly arranged on each gas bottle, so that each gas enters a gas pressure stabilizer after being primarily mixed, and the mixed gas can be ensured to be stable in the whole simulation flow.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings needed in the embodiments will be briefly described below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and it is obvious for those skilled in the art to obtain other drawings without creative efforts.
Fig. 1 is a schematic structural diagram of an exhaust pollutant discharge simulation apparatus according to embodiment 1 of the present invention;
fig. 2 is a schematic view of a connection relationship between a control system and other components in embodiment 1 of the present invention;
fig. 3 is a flowchart of a method for simulating exhaust pollutant emissions according to embodiment 2 of the present invention.
Symbol interpretation:
1: an air supply system; 2: a voltage stabilizing system; 3: a flow regulating system; 4: a heating system; 5: a gas measurement system; 6: a control system; 1-1: n is a radical of2A gas cylinder; 1-1-1: a first pressure reducing valve; 1-1-2: a first solenoid valve; 1-2: NO2A gas cylinder; 1-2-1: a second pressure reducing valve; 1-2-2: a second solenoid valve; 1-3: CO 22A gas cylinder; 1-3-1: a third pressure reducing valve; 1-3-2: a third electromagnetic valve; 1-4: a CO gas cylinder; 1-4-1: a fourth pressure reducing valve; 1-4-2: a fourth solenoid valve; 1-5: an HC gas cylinder; 1-5-1: a fifth pressure reducing valve; 1-5-2: a fifth solenoid valve; 1-6: a NO cylinder; 1-6-1: a sixth pressure reducing valve; 1-6-2: a sixth electromagnetic valve; 1-7: o is2A gas cylinder; 1-7-1: a seventh reducing valve; 1-7-2: a seventh electromagnetic valve; 3-1: a variable frequency motor; 3-2: a fan; 4-1: an inlet temperature sensor; 4-2: an outlet temperature sensor; 4-3: a heating device; 5-1: a flow rate measurement unit; 5-2: a temperature measuring unit; 5-3: a pressure measurement unit; 5-4: a component measuring unit; 5-4-1: n is a radical of2A sensor; 5-4-2: NO2A sensor; 5-4-3: CO 22A sensor; 5-4-4: a CO sensor; 5-4-5: an HC sensor; 5-4-6: a NO sensor; 5-4-7: o is2A 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 aims to provide a tail gas pollutant discharge simulation device and a tail gas pollutant discharge simulation method, and solves the problem that in the existing tail gas discharge simulation process, simulation tail gases at different temperatures and pressures cannot be simulated, so that the experimental result is inconsistent with the actual result.
In order to make the aforementioned objects, features and advantages of the present invention comprehensible, embodiments accompanied with figures are described in further detail below.
Example 1:
as shown in fig. 1, the present invention provides an exhaust pollutant discharge simulation device, which includes:
the gas supply system 1 is used for providing initial mixed gas simulating tail gas;
the pressure stabilizing system 2 is connected with the gas supply system 1 and is used for stabilizing the pressure of the initial mixed gas to obtain a pressure-stabilized mixed gas;
the flow regulating system 3 is connected with the pressure stabilizing system 2 and is used for extracting pressure stabilizing mixed gas from the pressure stabilizing system 2;
the heating system 4 is connected with the flow regulating system 3 and is used for obtaining the pressure-stabilizing mixed gas from the flow regulating system 3 and heating the temperature of the pressure-stabilizing mixed gas to the temperature required by the simulated tail gas to obtain the heated mixed gas;
the gas measuring system 5 is connected with the heating system 4 and is used for detecting the flow, the component concentration, the temperature and the pressure of the heated mixed gas;
as shown in fig. 2, the control system 6 is connected to the gas supply system 1, the pressure stabilizing system 2, the flow rate adjusting system 3, the heating system 4 and the gas measuring system 5, and is configured to control the operation conditions of the gas supply system 1, the pressure stabilizing system 2, the flow rate adjusting system 3 and the heating system 4 according to the detection results of the flow rate, the component concentration, the temperature and the pressure of the heated mixed gas until the detection results of various indexes of the heated mixed gas meet the requirements of subsequent experiments such as development of an exhaust emission purification device.
Wherein, between gas supply system 1 and steady voltage system 2, between steady voltage system 2 and flow control system 3, between flow control system 3 and heating system 4, between heating system 4 and the gas measurement system 5 all through linking the pipe connection, in order to improve the durability of device, link up the pipe connection and select the cylindric pipeline that has high temperature resistant anticorrosive characteristic and the diameter slightly is greater than its connected system pipeline diameter, in order to improve the leakproofness of device, link up the pipe connection with other system junctions and all have the gas tightness connection of leakproofness component, and the leakproofness component is quick detachable.
In practical implementation, in order to adjust the mixed gas with different component concentrations, the gas supply system 1 includes: n is a radical of2Gas cylinder 1-1, NO2Gas cylinder 1-2, CO21-3 gas cylinders, 1-4 CO gas cylinders, 1-5 HC gas cylinders, 1-6 NO gas cylinders and O21-7 of a gas cylinder;
in order to stably control the pressure, flow and direction of the gas output by each gas cylinder, a first pressure reducing valve 1-1-1 and a first electromagnetic valve 1-1-2 are correspondingly arranged at the outlet of the N2 gas cylinder 1-1, and NO is added2The outlet of the gas cylinder 1-2 is provided with a second pressure reducing valve 1-2-1 and a second electromagnetic valve 1-2-2, and CO is arranged2A third pressure reducing valve 1-3-1 and a third electromagnetic valve 1-3-2 are arranged at the outlet of the gas cylinder 1-3, a fourth pressure reducing valve 1-4-1 and a fourth electromagnetic valve 1-4-2 are arranged at the outlet of the CO gas cylinder 1-4, a fifth pressure reducing valve 1-5-1 and a fifth electromagnetic valve 1-5-2 are arranged at the outlet of the HC gas cylinder 1-5, a sixth pressure reducing valve 1-6-1 and a sixth electromagnetic valve 1-6-2 are arranged at the outlet of the NO gas cylinder 1-6, and an O gas cylinder2A seventh reducing valve 1-7-1 and a seventh electromagnetic valve 1-7-2 are arranged at the outlet of the gas cylinder 1-7;
each pressure reducing valve is connected with the control system 6 and used for reducing the pressure of gas flowing through and stabilizing the pressure to a fixed value, and the outlet pressure is automatically kept stable by means of the energy of the gas cylinder; each solenoid valve is connected to the control system 6 for regulating the direction, flow rate and speed of the gas flowing through.
In order to accurately control the flow of the pressure-stabilizing mixed gas, the flow regulating system 3 comprises a variable frequency motor 3-1 and a fan 3-2, the fan 3-2 is connected with the variable frequency motor 3-1, the variable frequency motor 3-1 is connected with a control system 6, the control system 6 controls the variable frequency motor 3-1 to drive the fan 3-2 to operate, and the pressure-stabilizing mixed gas in the pressure-stabilizing system 3 is extracted to the heating system 4 according to a set flow rate.
In some embodiments, the heating system 4 comprises an inlet temperature sensor 4-1, an outlet temperature sensor 4-2 and a heating device 4-3, the heating device 4-3 can be an electric heater, the inlet temperature sensor 4-1 is disposed at an inlet end of the heating system 4, the outlet temperature sensor 4-2 is disposed at an outlet end of the heating system 4, the inlet temperature sensor 4-1, the outlet temperature sensor 4-2 and the heating device 4-3 are all connected with a control system 6, and the control system 6 controls the specific heating temperature of the heating device 4-3 according to the temperature signals of the inlet temperature sensor 4-1 and the outlet temperature sensor 4-2.
In order to guarantee that the simulated tail gas can reach different index requirements so as to carry out different experiments, each index of the simulated tail gas needs to be accurately detected, and the gas measurement system 5 comprises:
the flow measurement unit 5-1 is connected with the control system 6 and used for detecting flow information of the heated mixed gas and feeding the flow information back to the control system 6;
the temperature measuring unit 5-2 is connected with the control system 6 and used for detecting the temperature information of the heated mixed gas and feeding the temperature information back to the control system 6;
the pressure measuring unit 5-3 is connected with the control system 6 and used for detecting the pressure information of the heated mixed gas and feeding the pressure information back to the control system 6;
and the component measuring unit 5-4 is connected with the control system 6 and is used for detecting the concentration information of each component in the heated mixed gas and feeding back the concentration information to the control system 6.
Wherein the component measuring unit 5-4 includes: n is a radical of2Sensor 5-4-1, NO2Sensor 5-4-2, CO2Sensor 5-4-3, CO sensor 5-4-4, HC sensor 5-4-5, NO sensor 5-4-6 and O2Sensors 5-4-7 for detecting N in the heated mixed gas, respectively2、NO2、CO2CO, HC, NO and O2The concentration of the gas.
In this embodiment, utilize steady voltage system 2 to adjust the atmospheric pressure of initial mist, still install heating system 4 simultaneously behind flow control system 3 and can heat steady voltage mist's temperature to the temperature of required simulation, solved the in-process that current tail gas simulation discharged, do not consider the problem of simulating tail gas under different temperatures and the different pressure, through the scheme of this application, can simulate out the tail gas pollutant of different pressures, different temperatures that discharge under the different operating modes.
Example 2:
as shown in fig. 3, the present invention also provides a method for simulating exhaust pollutant emission, comprising the following steps:
s1, receiving vehicle information and operating condition set values of the simulated vehicle required by the relevant experiment;
s2, controlling a pressure reducing valve and an electromagnetic valve of each gas cylinder of the gas supply system 1 according to the vehicle information and the set value of the operation condition of the simulated vehicle, adjusting the concentration and the pressure of each gas component to obtain initial mixed gas, and transmitting the initial mixed gas to the pressure stabilizing system 2 through a connecting pipeline;
s3, stabilizing the air pressure of the initial mixed gas by using the pressure stabilizing system 2 to obtain a pressure-stabilized mixed gas;
s4, controlling the flow regulating system 3 to extract the pressure-stabilizing mixed gas from the pressure-stabilizing system 2 to the heating system 4;
s5, controlling the heating system 4 to heat the pressure-stabilizing mixed gas to obtain a heated mixed gas;
s6, measuring the flow, the component, the temperature and the pressure of the heated mixed gas by using the gas measuring system 5;
s7, judging whether the flow, the composition, the temperature and the pressure of the heated mixed gas meet the requirements of tail gas required by the related experiment; if the requirement is not satisfied, performing step S8, and if the requirement is satisfied, performing step S9;
s8, readjusting the operation parameters of each system, returning to the step S2, and simulating the process of exhaust pollutant emission again;
and S9, using the generated heating mixed gas as tail gas pollutants for related experiments.
The tail gas pollutant discharge simulation method provided by the embodiment detects various indexes of tail gas simulated at every time by using the gas measurement system, and accurately controls the indexes of simulated different tail gas pollutants by controlling the indexes of the simulated different tail gas pollutants according to the operation working conditions of other systems in real time according to the detection result, so that the tail gas pollutants discharged under different working conditions and different temperatures are simulated, and experimental conditions are provided for developing tail gas discharge purification devices and the like.
The principles and embodiments of the present invention have been described herein using specific examples, which are provided only to help understand the method and the core concept of the present invention; meanwhile, for a person skilled in the art, according to the idea of the present invention, the specific embodiments and the application range may be changed. In view of the above, the present disclosure should not be construed as limiting the invention.
Claims (10)
1. A simulated exhaust pollutant discharge device, comprising:
the gas supply system is used for providing initial mixed gas for simulating tail gas;
the pressure stabilizing system is connected with the gas supply system and is used for stabilizing the pressure of the initial mixed gas to obtain a pressure-stabilized mixed gas;
the flow regulating system is connected with the pressure stabilizing system and is used for extracting the pressure stabilizing mixed gas from the pressure stabilizing system;
the heating system is connected with the flow regulating system and is used for heating the temperature of the pressure-stabilizing mixed gas to the temperature required by the simulated tail gas to obtain heated mixed gas;
the gas measurement system is connected with the heating system and is used for detecting the flow, the component concentration, the temperature and the pressure of the heated mixed gas;
control system, with gas supply system voltage stabilizing system flow control system heating system and gas measurement system connects, is used for according to right the testing result of heating mist's flow, composition concentration, temperature and pressure controls gas supply system voltage stabilizing system flow control system with heating system's operating condition, until the testing result of heating mist's flow, composition concentration, temperature and pressure index reaches the requirement that can carry out follow-up experiment.
2. The device for simulating pollutant emissions from exhaust gas of claim 1, wherein the gas supply system and the pressure stabilizing system, the pressure stabilizing system and the flow regulating system, the flow regulating system and the heating system, and the heating system and the gas measurement system are connected by connecting pipes.
3. The simulated exhaust pollutant discharge device of claim 1, wherein the air supply system comprises: n is a radical of2Gas cylinder, NO2Gas cylinder, CO2Gas cylinder, CO gas cylinder, HC gas cylinder, NO gas cylinder and O2A gas cylinder; the outlet of each gas cylinder is provided with a pressure reducing valve and an electromagnetic valve;
the pressure reducing valve is connected with the control system and is used for reducing the pressure of the gas flowing through and stabilizing the pressure to a fixed value, and the outlet pressure is automatically kept stable by means of the energy of the gas cylinder;
and the electromagnetic valve is connected with the control system and is used for adjusting the direction, the flow and the speed of the gas flowing through.
4. The device for simulating pollutant emissions from exhaust gas of claim 1, wherein the flow regulating system comprises a variable frequency motor and a fan, the fan is connected to the variable frequency motor, the variable frequency motor is connected to the control system, and the variable frequency motor is used for driving the fan to operate.
5. The simulated exhaust pollutant discharge device of claim 1, wherein the heating system comprises an inlet temperature sensor, an outlet temperature sensor and a heating device;
the inlet temperature sensor, the outlet temperature sensor and the heating device are all connected with the control system, and the control system controls the heating device to heat according to temperature signals of the inlet temperature sensor and the outlet temperature sensor; the heating device may be an electric heater.
6. The simulated exhaust pollutant discharge device of claim 1, wherein the gas measurement system comprises:
the flow measurement unit is connected with the control system and used for detecting the flow information of the heated mixed gas and feeding the flow information back to the control system;
the component measuring unit is connected with the control system and used for detecting the concentration information of each component in the heated mixed gas and feeding back the concentration information to the control system;
the temperature measuring unit is connected with the control system and used for detecting the temperature information of the heated mixed gas and feeding back the temperature information to the control system;
and the pressure measuring unit is connected with the control system and used for detecting the pressure information of the heated mixed gas and feeding back the pressure information to the control system.
7. The simulated exhaust pollutant discharge device of claim 6, wherein the composition measurement unit comprises: n is a radical of2Sensor, NO2Sensor, CO2Sensor, CO sensor, HC sensor, NO sensor, and O2Sensors for detecting N in the heated mixed gas respectively2、NO2、CO2CO, HC, NO and O2The concentration of the gas.
8. A method for simulating exhaust pollutant emission is characterized by comprising the following steps:
according to the input information and the set value of the operating condition of the simulated vehicle, an initial mixed gas is produced by using a gas supply system;
stabilizing the air pressure of the initial mixed gas by using a pressure stabilizing system to obtain a pressure-stabilized mixed gas;
controlling a flow regulating system to extract the pressure-stabilizing mixed gas from the pressure-stabilizing system to a heating system;
controlling the heating system to heat the pressure-stabilizing mixed gas to obtain a heated mixed gas;
measuring the flow, the composition, the temperature and the pressure of the heated mixed gas by using a gas measuring system;
judging whether the flow, the composition, the temperature and the pressure of the heated mixed gas meet the mixed gas requirement to be simulated or not;
if the requirements are not met, the operation parameters of each system are readjusted, and the process of simulating the exhaust pollutant emission is performed again;
if the requirements are met, the generated heated mixed gas is used as a tail gas pollutant for relevant experiments.
9. The method for simulating pollutant emissions in exhaust gas according to claim 8, wherein the step of preparing the initial mixed gas by the gas supply system according to the recorded information and the set value of the operating condition of the simulated vehicle further comprises:
receiving set vehicle information of the simulated vehicle;
and receiving the set running condition of the simulated vehicle.
10. The method for simulating pollutant emissions in exhaust gases according to claim 8, wherein the step of generating an initial mixture of gases by means of a gas supply system based on the information recorded and the operating conditions set points of the simulated vehicle comprises:
and controlling a pressure reducing valve and an electromagnetic valve of each gas cylinder of the gas supply system, adjusting the concentration and the pressure of each gas component to obtain initial mixed gas, and transmitting the initial mixed gas to the pressure stabilizing system through a connecting pipeline.
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| CN202110928762.8A CN113670379A (en) | 2021-08-13 | 2021-08-13 | Tail gas pollutant emission simulation device and method |
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| CN202110928762.8A CN113670379A (en) | 2021-08-13 | 2021-08-13 | Tail gas pollutant emission simulation device and method |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
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| CN115372046A (en) * | 2022-10-25 | 2022-11-22 | 佛山市顺德区美的洗涤电器制造有限公司 | Stable releasing device for simulating oil fume |
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| CN118067579A (en) * | 2024-04-19 | 2024-05-24 | 北京理工大学 | In-situ detection system and method for simulating evolution of particle morphology of tail gas of fuel vehicle and cooperating with thermophysical properties |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN114137164A (en) * | 2021-12-06 | 2022-03-04 | 安徽庆宇光电科技有限公司 | Jet pipe structure and motor vehicle tail gas remote sensing monitoring facilities |
| CN114137164B (en) * | 2021-12-06 | 2023-12-19 | 安徽庆宇光电科技有限公司 | Air jet pipe structure and motor vehicle tail gas remote sensing monitoring equipment |
| CN115372046A (en) * | 2022-10-25 | 2022-11-22 | 佛山市顺德区美的洗涤电器制造有限公司 | Stable releasing device for simulating oil fume |
| CN116165350A (en) * | 2023-03-13 | 2023-05-26 | 山东交通学院 | Method, system and equipment for detecting pollutants of diesel vehicle based on remote sensing technology |
| CN116165350B (en) * | 2023-03-13 | 2023-09-29 | 山东交通学院 | Method, system and equipment for detecting pollutants of diesel vehicle based on remote sensing technology |
| CN118067579A (en) * | 2024-04-19 | 2024-05-24 | 北京理工大学 | In-situ detection system and method for simulating evolution of particle morphology of tail gas of fuel vehicle and cooperating with thermophysical properties |
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