Multi-gas reaction kettle experiment system and application thereof in automobile exhaust catalyst evaluation

Abstract

The invention relates to the technical field of automobile exhaust treatment, in particular to a multi-gas reaction kettle experiment system and application thereof in automobile exhaust catalyst evaluation. The device comprises a reaction kettle device, a gas flow control device, a gas analysis and detection device, a temperature control device and a data acquisition control device, wherein the reaction kettle device comprises a reaction kettle, a gas inlet formed in the top of the reaction kettle and a gas outlet formed in the side part of the reaction kettle; the gas flow control device comprises a gas inlet valve, a flow meter, a one-way valve, a pressure gauge and a stop valve which are sequentially arranged on the main control loop; the gas analysis and detection device is a Fourier transform infrared spectrometer; the temperature control device comprises a water bath, a temperature sensor and a circulating jacket; the data acquisition control device comprises a PLC (Programmable Logic Controller) and a server; through the integrated reaction kettle, the gas flow control device, the gas analysis and detection device, the temperature control device and the data acquisition control device, highly accurate control of experimental conditions is realized.

Description

Technical Field

[0001] The invention relates to the technical field of automobile exhaust treatment, and in particular to a multi-gas reactor experimental system and its application in automobile exhaust catalyst evaluation. Background Art

[0002] As environmental regulations become stricter, automobile exhaust emission standards are raised, and higher performance requirements are placed on exhaust catalysts. In the fierce market competition, the cost-effectiveness of exhaust treatment catalysts has become the key. In the process of developing key catalytic materials, an evaluation device that can detect multiple gases, compare catalyst effects, and record gas concentrations in real time is required. Technicians have made many efforts, such as the hydrate reactor experimental system of Chinese patent CN114674999A, but the system still faces challenges. The lack of a unified integrated platform leads to complex operations and low efficiency; the gas flow, temperature and composition control accuracy is insufficient, such as large fluctuations in gas flow and inaccurate temperature control; at the same time, there is a lack of a complete gas leak detection and fault warning, and emergency response mechanism, which increases the safety risks of the experiment. Summary of the invention

[0003] The technical problem to be solved by the present invention is to overcome the deficiencies of the prior art and provide a multi-gas reactor experimental system and its application in automobile exhaust catalyst evaluation.

[0004] The technical solution adopted by the present invention is as follows: A multi-gas reactor experimental system includes a reactor device, a gas flow control device, a gas analysis and detection device, a temperature control device and a data acquisition control device, wherein: A reactor device, comprising a reactor, an air inlet located at the top of the reactor, and an air outlet located at the side of the reactor, wherein the air inlet is connected to a gas flow control device through a main control loop, and the air outlet is connected to the gas flow control device through a detection loop; The gas flow control device includes an air inlet valve, a flow meter, a one-way valve, a pressure gauge and a stop valve which are sequentially arranged on the main control circuit. The air inlet valve is connected to at least two gas cylinders. The end of the stop valve aggregates the main control circuits into one circuit and is connected to the air inlet of the reactor. The gas analysis and detection device is a Fourier transform infrared spectrometer, which includes a light source, a beam splitter and a probe. The light source is separated and composited by the beam splitter to obtain a composite light beam with interference. The composite light beam passes through the probe to obtain an interference pattern function and obtains an infrared spectrum through Fourier mathematical transformation. The temperature control device comprises a water bath, a temperature sensor and a circulation jacket; a heating wire is arranged in the water bath, the water bath is connected to the circulation jacket through a heating circuit, the circulation jacket is respectively arranged on the main control circuit, the detection circuit and the reactor, and the temperature sensor is arranged on the heating circuit; The data acquisition control device includes a PLC controller and a server. The PLC controller is respectively connected to the reactor device, the gas flow control device, the gas analysis and detection device and the temperature control device. The PLC controller integrates the data after the internal gas analysis of the Fourier transform infrared spectrometer and is connected to the server via the modbus TCP / IP protocol.

[0005] This technical solution constructs a multi-gas reactor experimental system by integrating a reactor device, a gas flow control device, a gas analysis and detection device, a temperature control device and a data acquisition control device, which can accurately control the experimental conditions, monitor the reaction process in real time, and collect and analyze experimental data. Specifically, the gas flow control strictly controls the type, flow rate and pressure of the gas entering the reactor through the precise combination of the inlet valve, flow meter, one-way valve, pressure gauge and stop valve, ensuring the accuracy and repeatability of the experimental conditions; the water bath and circulating jacket can accurately control the temperature in the reactor, the main control loop and the detection loop, which is used to maintain the thermodynamic equilibrium during the experiment and improve the accuracy of the experiment; the Fourier transform infrared spectrometer, as a gas analysis and detection device, can monitor the composition and concentration of the gas in the reactor in real time; the PLC controller is responsible for integrating and fusing data from various modules and connecting to the server through the modbus TCP / IP protocol; the one-way valve and stop valve ensure the one-way flow of gas in the system and safe isolation in emergency situations, which is used to prevent gas leakage and experimental accidents; the inlet valve can connect at least two gas cylinders and flexibly adapt to different gas combinations and experimental needs; as the experimental needs grow, the experimental system can easily add more functional modules or upgrade existing modules to meet more complex experimental requirements.

[0006] In addition, the multi-gas reactor experimental system and its application in automobile exhaust catalyst evaluation according to the present invention also have the following additional technical features: According to one embodiment of the present invention, the PLC controller is arranged in a control cabinet, and a touch screen and a Fourier transform infrared spectrometer connected to the PLC controller are arranged in the middle of the control cabinet; a group of gas flow control devices are respectively arranged on both sides of the control cabinet, and the two groups of gas flow control devices serve as backup for each other; wherein, the flow meter, pressure gauge and stop valve are respectively arranged on the upper parts of both sides of the control cabinet.

[0007] In this technical solution, a set of gas flow control devices is set on both sides of the control cabinet, and the two sets of devices serve as backup for each other. This means that when one set of devices fails, the other set will immediately take over the work to ensure the continuity and stability of the experimental process; in addition, key components such as flow meters, pressure gauges and stop valves are also set on the upper parts of both sides of the control cabinet. This layout is not only convenient for observation and operation, but also can reduce the risk of system downtime caused by single component failure to a certain extent; the components in the control cabinet are compactly and orderly arranged, which not only ensures sufficient heat dissipation space, but also facilitates maintenance personnel to carry out daily inspection and maintenance work.

[0008] According to one embodiment of the present invention, the main control circuit includes at least the following circuits: CO gas circuit, CO2 gas circuit, O2 gas circuit, N2 gas circuit, NH3 gas circuit, C3H6 gas circuit, NO gas circuit, and CH4 gas circuit.

[0009] In this technical solution, the main control circuit includes eight circuits, and two redundant circuits are also set up; this allows researchers to flexibly adjust different gas combinations and concentrations in the same experimental system to explore and understand the impact of different gases on chemical reactions.

[0010] According to one embodiment of the present invention, the heating circuit includes a heating solenoid valve, which is connected to a PLC controller; the heating solenoid valve in the heating circuit is redundantly configured, that is, each heating circuit is equipped with at least two parallel heating solenoid valves. When one solenoid valve fails, the other immediately takes over the work to ensure continuous and stable operation of the heating circuit.

[0011] In this technical solution, in the heating circuit, the heating solenoid valve is a key component for controlling the flow of the heating medium; a redundant setting is adopted, that is, each heating circuit is equipped with at least two parallel heating solenoid valves to ensure that when one solenoid valve fails, the other can immediately take over the work, thereby avoiding interruption of the heating circuit.

[0012] According to one embodiment of the present invention, the circulation jacket is a double-layer structure, with the inner layer circulating the heating medium and the outer layer being an insulation layer, to ensure that the gas temperature in the reactor, the main control circuit and the detection circuit is stable and evenly distributed; the insulation layer is made of high-efficiency thermal insulation material.

[0013] This technical solution uses a double-layer structure and high-efficiency thermal insulation materials. The circulating jacket can significantly reduce energy loss during the heating process, improve energy utilization efficiency, and reduce production costs while reducing environmental impact. For example, by changing the type, flow rate and temperature of the heating medium, the temperature of the reaction medium can be accurately controlled; in addition, the double-layer structure and thermal insulation layer also facilitate equipment maintenance and overhaul, reducing maintenance costs.

[0014] According to one embodiment of the present invention, the gas analysis and detection device further comprises a calibration module, which regularly performs wavenumber calibration and baseline correction on the Fourier transform infrared spectrometer; the calibration module is connected to the PLC controller.

[0015] In the present technical solution, the accuracy of the measurement results of the Fourier transform infrared spectrometer is directly related to the reliability of gas analysis; long-term operation or environmental changes lead to instrument performance deviations, such as wavenumber drift and baseline deviation, which affect the measurement accuracy; the calibration module regularly performs wavenumber calibration and baseline correction on the Fourier transform infrared spectrometer to eliminate these deviations and ensure the accuracy and consistency of the measurement data; wavenumber calibration is used to adjust the spectral position of the instrument to correspond to the actual wavelength; baseline correction is used to eliminate instrument background noise and improve the signal-to-noise ratio; regular calibration is used to maintain the stability of FTIR performance and reduce measurement errors caused by degradation of instrument performance.

[0016] According to one embodiment of the present invention, the control cabinet is also provided with a gas leakage detection device, which includes a gas detection sensor and an alarm. The gas detection sensor is located in the main control circuit, and the alarm is located in the middle of the control cabinet. The gas detection sensor is connected through a PLC controller, and the alarm record is transmitted to the server through the PLC controller. The maximum recording period of the server's data record is acquisition / s, recording / s.

[0017] In this technical solution, the gas leakage detection device is used to monitor the gas concentration in the main control circuit in real time. By setting a gas detection sensor in the main control circuit, potential gas leakage can be discovered in time, thereby effectively preventing safety accidents caused by gas leakage; once the gas detection sensor detects that the gas concentration exceeds the preset safety threshold, the alarm will be activated immediately and send out an audible and visual alarm signal to remind the operator to pay attention and take corresponding measures.

[0018] To achieve the above-mentioned purpose, the present invention also provides an application of a multi-gas reactor experimental system in the evaluation of automobile exhaust catalysts.

[0019] According to one embodiment of the present invention, the following steps are included: S1. Assembly of the experimental system: The control cabinet is equipped with a PLC controller, a gas flow control device, and a temperature control device. The gas flow control device is connected to the CO gas circuit, CO2 gas circuit, O2 gas circuit, N2 gas circuit, NH3 gas circuit, C3H6 gas circuit, NO gas circuit, and CH4 gas circuit through an inlet valve; the server is connected to several groups of PLC controllers through the modbus TCP / IP protocol; S2, gas flow control: open the inlet valve of the required gas, the gas passes through the flow meter to measure the flow, the one-way valve ensures the one-way flow of the gas, and the pressure gauge displays the gas pressure; the flow controller of each gas circuit is adjusted by the PLC controller to accurately control the gas flow entering the reactor; the end of the stop valve aggregates the main control circuits into one circuit and connects it to the air inlet of the reactor to ensure that the gas enters the reactor after being mixed in the preset ratio; S3, temperature control: The PLC controller controls the heating wire to heat the water bath through the heating circuit according to the preset temperature value; the heating medium in the circulating jacket absorbs heat from the water bath and transfers the heat to the reactor, the main control circuit and the gas in the detection circuit to maintain a stable temperature; the temperature sensor monitors the temperature of the heating circuit in real time and feeds the data back to the PLC controller, which adjusts the heating power according to the feedback data to keep the temperature constant; the heating solenoid valve in the heating circuit adopts a redundant setting; S4, gas analysis and detection: The gas in the reactor enters the detection circuit through the gas outlet and finally reaches the probe of the Fourier transform infrared spectrometer; the light emitted by the light source is separated and compounded by the beam splitter to obtain a composite light beam with interference; the composite light beam passes through the probe to obtain an interference pattern function; the interference pattern function is transformed by Fourier mathematical transformation to obtain an infrared spectrum, thereby analyzing the gas composition and concentration; the calibration module regularly performs wavenumber calibration and baseline correction on the Fourier transform infrared spectrometer; S5. Data acquisition control: The PLC controller integrates the data after gas analysis in the Fourier transform infrared spectrometer; the PLC controller transmits the data to the server for storage in real time through the modbus TCP / IP protocol; the touch screen in the control cabinet is used to monitor the operating status and data of the experimental system in real time; the gas leakage detection device monitors the gas leakage of the main control circuit in real time. Once a leak is detected, the alarm is triggered immediately and the alarm record is transmitted to the server through the PLC controller; the data recording function of the server runs at the maximum recording cycle.

[0020] This technical solution is assembled through the S1 experimental system, including a PLC controller, a gas flow control device, and a temperature control device, and each gas circuit is connected to the gas flow control device through an intake valve to achieve precise control of multiple gases; the connection between the server and the PLC controller; through S2 gas flow control, using flow meters, one-way valves, pressure gauges and other components to ensure accurate metering and one-way flow of gases, and adjusting the flow controller through the PLC controller to achieve precise control of the gas flow entering the reactor; the summarizing function of the stop valve ensures that the gas enters the reactor after mixing in a preset proportion; through S3 temperature control, using the PLC controller to adjust the heating circuit according to the preset temperature value, the water bath is heated by the heating wire, and then the heat is transferred to the reactor and the gas in the main control circuit through the circulating jacket to maintain temperature stability; real-time monitoring and feedback of the temperature sensor , and redundant settings of heating solenoid valves to improve the accuracy and reliability of temperature control; through S4 gas analysis and detection, the composition and concentration of the gas in the reactor are analyzed using a Fourier transform infrared spectrometer, and accurate gas analysis data are obtained through the synergy of components such as light source, beam splitter, probe, and the processing of interference pattern function and Fourier mathematical transform; regular calibration of the calibration module ensures the accuracy of the analysis data; through S5 data acquisition control, the PLC controller integrates and integrates the internal gas analysis data of the Fourier transform infrared spectrometer, and transmits the data to the server in real time for storage through the modbusTCP / IP protocol; the real-time monitoring function of the touch screen and the linkage between the gas leakage detection device and the PLC controller provide strong guarantees for the safe operation of the experimental system; the maximum recording cycle operation of the server ensures the integrity of the data.

[0021] According to one embodiment of the present invention, the automobile exhaust catalyst is a precious metal catalyst, and the active components of the precious metal catalyst include platinum, rhodium and palladium.

[0022] In the present technical solution, in automobile exhaust treatment, precious metal catalysts can effectively promote the conversion of harmful gases, such as converting carbon monoxide (CO), hydrocarbons (HC) and nitrogen oxides (NOx) into harmless carbon dioxide (CO2), water and nitrogen (N2).

[0023] Compared with the prior art, the present invention has the following beneficial effects: (1) High integration and precise control: By integrating the reactor, gas flow control, gas analysis and detection, temperature control and data acquisition control devices, highly precise control of experimental conditions can be achieved; gas flow, temperature and gas composition can be adjusted as needed to ensure the accuracy and repeatability of experimental conditions; (2) Improved safety and reliability: The system's built-in gas leak detection device and redundant settings, such as redundant heating solenoid valves and backup of gas flow control devices, greatly improve the safety and reliability of the experimental process. Once an abnormal situation occurs, the system can respond quickly and take corresponding measures to effectively prevent experimental accidents and ensure the safety of personnel and equipment. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] Figure 1 It is the electrical diagram of the experimental system of the present invention.

[0025] Figure 2 It is a structural schematic diagram of the control cabinet of the present invention.

[0026] Figure 3 It is the electrical diagram of the PLC controller and the server.

[0027] Figure 4 It is the gas path layout diagram of the experimental system of the present invention.

[0028] Figure 5 This is the interface diagram of the Fourier transform infrared spectrometer.

[0029] Figure 6 It is an interface diagram of the experimental system of the present invention.

[0030] In the figure: 1. Reactor; 2. Air inlet valve; 3. Pressure gauge; 4. Stop valve; 5. Temperature control device; 6. Fourier transform infrared spectrometer; 7. Touch screen; 8. Control cabinet; 9. PLC controller. DETAILED DESCRIPTION

[0031] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0032] Example 1 like Figures 1 to 4 As shown, this embodiment provides a multi-gas reactor experimental system, including a reactor device, a gas flow control device, a gas analysis and detection device, a temperature control device 5 and a data acquisition control device, wherein: A reactor device, comprising a reactor 1, an air inlet located at the top of the reactor 1, and an air outlet located at the side of the reactor 1, wherein the air inlet is connected to a gas flow control device through a main control loop, and the air outlet is connected to the gas flow control device through a detection loop; The gas flow control device comprises an inlet valve 2, a flow meter, a one-way valve, a pressure gauge 3 and a stop valve 4 which are sequentially arranged on the main control circuit. The inlet valve 2 is connected to at least two gas cylinders. The end of the stop valve 4 combines the main control circuits into one circuit and is connected to the air inlet of the reactor 1. The gas analysis and detection device is a Fourier transform infrared spectrometer 6, which includes a light source, a beam splitter and a probe. The light source is separated and composited by the beam splitter to obtain a composite light beam with interference. The composite light beam passes through the probe to obtain an interference pattern function and obtains an infrared spectrum through Fourier mathematical transformation; The temperature control device 5 includes a water bath, a temperature sensor and a circulation jacket; a heating wire is arranged in the water bath, the water bath is connected to the circulation jacket through a heating circuit, the circulation jacket is respectively located on the main control circuit, the detection circuit and the reactor 1, and the temperature sensor is located on the heating circuit; The data acquisition control device includes a PLC controller 9 and a server. The PLC controller 9 is respectively connected to the reactor device, the gas flow control device, the gas analysis and detection device and the temperature control device 5. The PLC controller 9 integrates the data after the internal gas analysis of the Fourier transform infrared spectrometer 6 and is connected to the server via the modbus TCP / IP protocol.

[0033] like Figures 1 to 4 As shown, the technical solution constructs a multi-gas reactor experimental system by integrating a reactor device, a gas flow control device, a gas analysis and detection device, a temperature control device 5 and a data acquisition control device, which can accurately control the experimental conditions, monitor the reaction process in real time, and collect and analyze experimental data. Specifically, the gas flow control strictly controls the type, flow rate and pressure of the gas entering the reactor 1 through the precise combination of the inlet valve 2, flow meter, one-way valve, pressure gauge 3 and stop valve 4, ensuring the accuracy and repeatability of the experimental conditions; the water bath and the circulating jacket can accurately control the temperature in the reactor 1, the main control loop and the detection loop, which is used to maintain the thermodynamic equilibrium during the experiment and improve the accuracy of the experiment; the Fourier transform infrared spectrometer 6 is a gas analysis and detection device that can monitor the composition and concentration of the gas in the reactor 1 in real time; the PLC controller 9 is responsible for integrating and fusing data from various modules and is connected to the server through the modbus TCP / IP protocol; the one-way valve and the stop valve 4 ensure the one-way flow of gas in the system and the safe isolation in emergency situations, which is used to prevent gas leakage and experimental accidents; the inlet valve 2 can connect at least two gas cylinders and flexibly adapt to different gas combinations and experimental needs; as the experimental needs grow, the experimental system can easily add more functional modules or upgrade existing modules to meet more complex experimental requirements.

[0034] In addition, the multi-gas reactor experimental system and its application in automobile exhaust catalyst evaluation according to the present invention also have the following additional technical features: like Figure 2 As shown, the PLC controller 9 is arranged in a control cabinet 8, and a touch screen 7 and a Fourier transform infrared spectrometer 6 connected to the PLC controller 9 are arranged in the middle of the control cabinet 8; a group of gas flow control devices are respectively arranged on both sides of the control cabinet 8, and the two groups of gas flow control devices are backed up for each other; among them, the flow meter, the pressure gauge 3 and the stop valve 4 are respectively arranged on the upper parts of both sides of the control cabinet 8.

[0035] In this technical solution, a set of gas flow control devices is respectively arranged on both sides of the control cabinet 8, and the two sets of devices serve as backup for each other. This means that when one set of devices fails, the other set will immediately take over the work to ensure the continuity and stability of the experimental process; in addition, key components such as flow meter, pressure gauge 3 and stop valve 4 are also respectively arranged on the upper part of both sides of the control cabinet 8. Such a layout is not only convenient for observation and operation, but also can reduce the risk of system downtime caused by single component failure to a certain extent; the components in the control cabinet 8 are compactly and orderly arranged, which not only ensures sufficient heat dissipation space, but also facilitates maintenance personnel to carry out daily inspection and maintenance work.

[0036] According to one embodiment of the present invention, the main control circuit includes at least the following circuits: CO gas circuit, CO2 gas circuit, O2 gas circuit, N2 gas circuit, NH3 gas circuit, C3H6 gas circuit, NO gas circuit, and CH4 gas circuit.

[0037] In this technical solution, the main control circuit includes eight circuits, and two redundant circuits are also set up; this allows researchers to flexibly adjust different gas combinations and concentrations in the same experimental system to explore and understand the impact of different gases on chemical reactions.

[0038] According to one embodiment of the present invention, the heating circuit includes a heating solenoid valve, which is connected to a PLC controller 9; the heating solenoid valve in the heating circuit is redundantly configured, that is, each heating circuit is equipped with at least two parallel heating solenoid valves. When one solenoid valve fails, the other immediately takes over to ensure continuous and stable operation of the heating circuit.

[0039] In this technical solution, in the heating circuit, the heating solenoid valve is a key component for controlling the flow of the heating medium; a redundant setting is adopted, that is, each heating circuit is equipped with at least two parallel heating solenoid valves to ensure that when one solenoid valve fails, the other can immediately take over the work, thereby avoiding interruption of the heating circuit.

[0040] According to one embodiment of the present invention, the circulation jacket is a double-layer structure, with the inner layer circulating the heating medium and the outer layer being an insulation layer, to ensure that the gas temperature in the reactor 1, the main control circuit and the detection circuit is stable and evenly distributed; the insulation layer is made of high-efficiency thermal insulation material.

[0041] This technical solution uses a double-layer structure and high-efficiency thermal insulation materials. The circulating jacket can significantly reduce energy loss during the heating process, improve energy utilization efficiency, and reduce production costs while reducing environmental impact. For example, by changing the type, flow rate and temperature of the heating medium, the temperature of the reaction medium can be accurately controlled; in addition, the double-layer structure and thermal insulation layer also facilitate equipment maintenance and overhaul, reducing maintenance costs.

[0042] According to an embodiment of the present invention, the gas analysis and detection device further comprises a calibration module, which regularly performs wavenumber calibration and baseline correction on the Fourier transform infrared spectrometer 6 ; the calibration module is connected to the PLC controller 9 .

[0043] like Figure 5 and Figure 6 As shown, the accuracy of the measurement results of the Fourier transform infrared spectrometer 6 is directly related to the reliability of gas analysis; long-term operation or environmental changes lead to instrument performance deviations, such as wavenumber drift and baseline deviation, which affect the measurement accuracy; the calibration module regularly performs wavenumber calibration and baseline correction on the Fourier transform infrared spectrometer 6 to eliminate these deviations and ensure the accuracy and consistency of the measurement data; the wavenumber calibration is used to adjust the spectral position of the instrument to correspond to the actual wavelength; the baseline correction is used to eliminate the instrument background noise and improve the signal-to-noise ratio; regular calibration is used to maintain the stability of the FTIR performance and reduce the measurement error caused by the degradation of the instrument performance.

[0044] According to one embodiment of the present invention, the control cabinet 8 is also provided with a gas leakage detection device, which includes a gas detection sensor and an alarm. The gas detection sensor is located in the main control loop, and the alarm is located in the middle of the control cabinet 8. The gas detection sensor is connected through a PLC controller 9, and the alarm record is transmitted to the server through the PLC controller 9. The maximum recording period of the server's data record is acquisition / s, recording / s.

[0045] In this technical solution, the gas leakage detection device is used to monitor the gas concentration in the main control circuit in real time. By setting a gas detection sensor in the main control circuit, potential gas leakage can be discovered in time, thereby effectively preventing safety accidents caused by gas leakage; once the gas detection sensor detects that the gas concentration exceeds the preset safety threshold, the alarm will be activated immediately and send out an audible and visual alarm signal to remind the operator to pay attention and take corresponding measures.

[0046] Example 2 Based on Example 1, Figure 1 As shown, this embodiment also provides an application of a multi-gas reactor experimental system in the evaluation of automobile exhaust catalysts.

[0047] According to one embodiment of the present invention, the following steps are included: S1. Assembly of the experimental system: The control cabinet 8 is equipped with a PLC controller 9, a gas flow control device, and a temperature control device 5. The gas flow control device is connected to the CO gas circuit, CO2 gas circuit, O2 gas circuit, N2 gas circuit, NH3 gas circuit, C3H6 gas circuit, NO gas circuit, and CH4 gas circuit through the inlet valve 2; the server is connected to several groups of PLC controllers 9 through the modbus TCP / IP protocol; S2, gas flow control: open the inlet valve 2 of the required gas, the gas passes through the flow meter to measure the flow, the one-way valve ensures the one-way flow of the gas, and the pressure gauge 3 displays the gas pressure; the flow controller of each gas circuit is adjusted by the PLC controller 9 to accurately control the gas flow entering the reactor 1; the end of the stop valve 4 aggregates the main control circuits into one circuit and is connected to the air inlet of the reactor 1 to ensure that the gas enters the reactor 1 after being mixed in a preset ratio; S3, temperature control: PLC controller 9 controls the heating wire to heat the water bath through the heating circuit according to the preset temperature value; the heating medium in the circulating jacket absorbs heat from the water bath and transfers the heat to the gas in the reactor 1, the main control circuit and the detection circuit to maintain a stable temperature; the temperature sensor monitors the temperature of the heating circuit in real time and feeds the data back to PLC controller 9, and PLC controller 9 adjusts the heating power according to the feedback data to keep the temperature constant; the heating solenoid valve in the heating circuit adopts a redundant setting; S4, gas analysis and detection: the gas in the reactor 1 enters the detection circuit through the gas outlet and finally reaches the probe of the Fourier transform infrared spectrometer 6; the light emitted by the light source is separated and compounded by the beam splitter to obtain a composite light beam with interference; the composite light beam passes through the probe to obtain an interference pattern function; the interference pattern function is transformed by Fourier mathematical transformation to obtain an infrared spectrum, thereby analyzing the gas composition and concentration; the calibration module regularly performs wave number calibration and baseline correction on the Fourier transform infrared spectrometer 6; S5, data acquisition control: PLC controller 9 integrates the data after gas analysis in Fourier transform infrared spectrometer 6; PLC controller 9 transmits data to the server in real time for storage through modbus TCP / IP protocol; touch screen 7 in control cabinet 8 is used to monitor the operation status and data of the experimental system in real time; gas leakage detection device monitors the gas leakage of the main control circuit in real time, and once leakage is detected, the alarm is triggered immediately and the alarm record is transmitted to the server through PLC controller 9; the data recording function of the server runs at the maximum recording cycle.

[0048] This technical solution is assembled through the S1 experimental system, including a PLC controller 9, a gas flow control device, and a temperature control device 5, and each gas circuit is connected to the gas flow control device through the air inlet valve 2 to achieve precise control of multiple gases; the connection between the server and the PLC controller 9; through the S2 gas flow control, the flow meter, the one-way valve, the pressure gauge 3 and other components are used to ensure the accurate measurement and one-way flow of the gas, and the flow controller is adjusted by the PLC controller 9 to achieve precise control of the gas flow entering the reactor 1; the summing function of the stop valve 4 ensures that the gas enters the reactor 1 after mixing in a preset ratio; through the S3 temperature control, the PLC controller 9 is used to adjust the heating circuit according to the preset temperature value, and the water bath is heated by the heating wire. Heating, and then transferring heat to the reactor 1 and the gas in the main control loop through the circulation jacket to maintain temperature stability; real-time monitoring and feedback of the temperature sensor, and redundant settings of the heating solenoid valve improve the accuracy and reliability of temperature control; through S4 gas analysis and detection, the composition and concentration of the gas in the reactor 1 are analyzed by Fourier transform infrared spectrometer 6, and accurate gas analysis data are obtained through the synergy of components such as light source, beam splitter, probe, and interference pattern function and Fourier mathematical transformation. Regular calibration of the calibration module ensures the accuracy of the analysis data; through S5 data acquisition control, the PLC controller 9 realizes the integration and fusion of the gas analysis data inside the Fourier transform infrared spectrometer 6, and transmits the data to the server in real time for storage through the modbus TCP / IP protocol; the real-time monitoring function of the touch screen 7, and the linkage between the gas leakage detection device and the PLC controller 9 provide strong guarantees for the safe operation of the experimental system; the maximum recording cycle operation of the server ensures the integrity of the data.

[0049] According to one embodiment of the present invention, the automobile exhaust catalyst is a precious metal catalyst, and the active components of the precious metal catalyst include platinum, rhodium and palladium.

[0050] In the present technical solution, in automobile exhaust treatment, precious metal catalysts can effectively promote the conversion of harmful gases, such as converting carbon monoxide (CO), hydrocarbons (HC) and nitrogen oxides (NOx) into harmless carbon dioxide (CO2), water and nitrogen (N2).

[0051] Although the present invention is described in detail by referring to the accompanying drawings and in combination with the preferred embodiments, the present invention is not limited thereto. Without departing from the spirit and essence of the present invention, a person of ordinary skill in the art may make various equivalent modifications or substitutions to the embodiments of the present invention, and these modifications or substitutions shall be within the scope of the present invention. Any person of ordinary skill in the art may easily think of changes or substitutions within the technical scope disclosed by the present invention, and these shall be within the scope of protection of the present invention. Therefore, the scope of protection of the present invention shall be subject to the scope of protection of the claims.

Claims

1. A multi-gas reactor experimental system, characterized in that: It comprises a reaction kettle device, a gas flow control device, a gas analysis and detection device, a temperature control device (5) and a data acquisition control device, wherein: A reactor device, comprising a reactor (1), an air inlet located at the top of the reactor (1), and an air outlet located at the side of the reactor (1), wherein the air inlet is connected to a gas flow control device via a main control loop, and the air outlet is connected to the gas flow control device via a detection loop; The gas flow control device comprises an air intake valve (2), a flow meter, a one-way valve, a pressure gauge (3) and a stop valve (4) which are sequentially arranged on a main control circuit, the air intake valve (2) being connected to at least two gas cylinders, and the end of the stop valve (4) combining the main control circuits into one circuit and being connected to the air intake of the reaction kettle (1); The gas analysis and detection device is a Fourier transform infrared spectrometer (6), which includes a light source, a beam splitter and a probe. The light source is separated and composited by the beam splitter to obtain a composite light beam with interference. The composite light beam passes through the probe to obtain an interference pattern function and obtains an infrared spectrum through Fourier mathematical transformation. The temperature control device (5) comprises a water bath, a temperature sensor and a circulation jacket; a heating wire is arranged in the water bath, the water bath is connected to the circulation jacket through a heating circuit, the circulation jacket is respectively located on the main control circuit, the detection circuit and the reaction kettle (1), and the temperature sensor is located on the heating circuit; The data acquisition control device comprises a PLC controller (9) and a server. The PLC controller (9) is respectively connected to a reaction kettle device, a gas flow control device, a gas analysis and detection device and a temperature control device (5). The PLC controller (9) integrates and fuses data after gas analysis in a Fourier transform infrared spectrometer (6), and is connected to the server via a modbus TCP / IP protocol.

2. The multi-gas reactor experimental system according to claim 1, characterized in that: The PLC controller (9) is arranged in a control cabinet (8), and a touch screen (7) and a Fourier transform infrared spectrometer (6) connected to the PLC controller (9) are arranged in the middle of the control cabinet (8); a group of gas flow control devices are respectively arranged on both sides of the control cabinet (8), and the two groups of gas flow control devices serve as backup for each other; wherein the flow meter, the pressure gauge (3) and the stop valve (4) are respectively arranged on the upper parts of both sides of the control cabinet (8).

3. The multi-gas reactor experimental system according to claim 1 or 2, characterized in that: The main control circuit includes at least the following circuits: a CO gas circuit, a CO2 gas circuit, an O2 gas circuit, a N2 gas circuit, an NH3 gas circuit, a C3H6 gas circuit, a NO gas circuit, and a CH4 gas circuit.

4. The multi-gas reactor experimental system according to claim 1, characterized in that: The heating circuit comprises a heating solenoid valve, which is connected to a PLC controller (9); the heating solenoid valve in the heating circuit is redundantly arranged, that is, each heating circuit is equipped with at least two parallel heating solenoid valves, and when one solenoid valve fails, the other immediately takes over the work, thereby ensuring the continuous and stable operation of the heating circuit.

5. The multi-gas reactor experimental system according to claim 1, characterized in that: The circulation jacket is a double-layer structure, with the inner layer circulating the heating medium and the outer layer being a heat-insulating layer, so as to ensure that the gas temperature in the reactor (1), the main control circuit and the detection circuit is stable and evenly distributed; the heat-insulating layer is made of high-efficiency heat-insulating material.

6. The multi-gas reactor experimental system according to claim 1, characterized in that: The gas analysis and detection device also includes a calibration module, which regularly performs wave number calibration and baseline correction on the Fourier transform infrared spectrometer (6); the calibration module is connected to the PLC controller (9).

7. The multi-gas reactor experimental system according to claim 2, characterized in that: The control cabinet (8) is also provided with a gas leakage detection device, which comprises a gas detection sensor and an alarm. The gas detection sensor is located in the main control circuit, and the alarm is located in the middle of the control cabinet (8). The gas detection sensor is connected via a PLC controller (9), and the alarm record is transmitted to the server via the PLC controller (9). The maximum recording cycle of the data record of the server is acquisition / s, recording / s.

8. Application of a multi-gas reactor experimental system in the evaluation of automobile exhaust catalysts, characterized in that: A multi-gas reactor experimental system as described in any one of claims 1 to 7 is used.

9. Application of the multi-gas reactor experimental system as claimed in claim 8 in the evaluation of automobile exhaust catalysts, characterized in that: The steps include: S1. Assembly of the experimental system: The control cabinet (8) is equipped with a PLC controller (9), a gas flow control device, and a temperature control device (5). The gas flow control device is connected to a CO gas circuit, a CO2 gas circuit, an O2 gas circuit, a N2 gas circuit, an NH3 gas circuit, a C3H6 gas circuit, a NO gas circuit, and a CH4 gas circuit through an inlet valve (2); the server is connected to several groups of PLC controllers (9) through a modbus TCP / IP protocol; S2, gas flow control: open the inlet valve (2) of the required gas, the gas passes through the flow meter to measure the flow rate, the one-way valve ensures the one-way flow of the gas, and the pressure gauge (3) displays the gas pressure; the flow controller of each gas circuit is adjusted by the PLC controller (9) to accurately control the gas flow entering the reactor (1); the end of the stop valve (4) combines the main control circuits into one circuit and connects it to the air inlet of the reactor (1) to ensure that the gas enters the reactor (1) after being mixed in a preset ratio; S3, temperature control: the PLC controller (9) controls the heating wire to heat the water bath through the heating circuit according to the preset temperature value; the heating medium in the circulating jacket absorbs heat from the water bath and transfers the heat to the gas in the reactor (1), the main control circuit and the detection circuit to maintain a stable temperature; the temperature sensor monitors the temperature of the heating circuit in real time and feeds the data back to the PLC controller (9), and the PLC controller (9) adjusts the heating power according to the feedback data to keep the temperature constant; the heating solenoid valve in the heating circuit adopts a redundant setting; S4, gas analysis and detection: the gas in the reactor (1) enters the detection circuit through the gas outlet and finally reaches the probe of the Fourier transform infrared spectrometer (6); the light emitted by the light source is separated and composited by the beam splitter to obtain a composite light beam with interference; the composite light beam passes through the probe to obtain an interference pattern function; the interference pattern function is transformed by Fourier mathematical transformation to obtain an infrared spectrum, thereby analyzing the gas composition and concentration; the calibration module regularly performs wave number calibration and baseline correction on the Fourier transform infrared spectrometer (6); S5. Data acquisition control: The PLC controller (9) integrates the data after gas analysis in the Fourier transform infrared spectrometer (6); the PLC controller (9) transmits the data to the server in real time for storage via the modbus TCP / IP protocol; the touch screen (7) in the control cabinet (8) is used to monitor the operating status and data of the experimental system in real time; the gas leakage detection device monitors the gas leakage of the main control circuit in real time, and once a leakage is detected, the alarm is immediately triggered and the alarm record is transmitted to the server via the PLC controller (9); the data recording function of the server runs at the maximum recording cycle.

10. Application of the multi-gas reactor experimental system according to claim 8 in the evaluation of automobile exhaust catalysts, characterized in that: The automobile exhaust catalyst is a precious metal catalyst, and the active components of the precious metal catalyst include platinum, rhodium and palladium.

Images