Ectopic catalytic cracking product online monitoring and catalyst evaluation device

Abstract

The utility model discloses an ectopic catalytic cracking product on-line monitoring and catalyst evaluation device which comprises a pyrolysis reactor and a catalytic reactor, the pyrolysis reactor and the catalytic reactor are connected through a conveying pipeline, and the conveying pipeline is used for conveying pyrolysis products in the pyrolysis reactor into the catalytic reactor. An exhaust port of the catalytic reactor is connected with the monitoring and evaluation module through an exhaust pipeline, and the exhaust pipeline is used for conveying ectopic catalytic cracking products in the catalytic reactor into the monitoring and evaluation module; a waste gas collecting assembly is arranged below the conveying pipeline, a gas inlet of the waste gas collecting assembly is connected with a gas collecting pipeline, and the waste gas collecting assembly communicates with the conveying pipeline and the exhaust pipeline through the gas collecting pipeline. Compared with the prior art, the device disclosed by the utility model has the advantages that pyrolysis and catalytic reactions can be carried out in different positions, so that the treatment effect of a catalyst on harmful substances is better reflected, and the evaluation precision of the catalyst is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of tobacco catalytic cracking experimental devices, in particular to an online monitoring device for heterogeneous catalytic cracking products and a catalyst evaluation device. Background Art

[0002] Currently, online monitoring of catalytic cracking products and catalyst evaluation devices are widely used in tobacco catalytic cracking experiments. Traditional online monitoring devices are primarily used to detect harmful substances such as CO, NO, NH3, and nitrosamines produced during tobacco cracking in real time. Specifically, they monitor the cracking products generated by tobacco under high-temperature conditions. These devices analyze the ability of different catalysts to treat harmful substances during the cracking process in real time, thereby evaluating the catalyst's effectiveness. Prior art generally integrates the catalyst and cracking apparatus in the same location, a method commonly known as isotopic cracking. This simplifies the experimental process and improves the efficiency of cracking product collection and analysis.

[0003] However, existing isotopic cracking devices still have some shortcomings. First, because pyrolysis and catalytic reactions occur in the same location, the reaction between the pyrolysis products and the catalyst is difficult to control, making it difficult to accurately reflect the catalyst's treatment effect on the pyrolysis products. Second, isotopic cracking can easily lead to rapid catalyst failure during the high-temperature cracking process, which in turn affects the catalyst's long-term stability and reusability. Third, it is difficult to independently control the temperatures of the pyrolysis and catalytic reactions within the isotopic cracking device, which may also affect catalyst evaluation results. Utility Model Content

[0004] The purpose of the utility model is to overcome the deficiencies of the prior art and provide an online monitoring device for heterogeneous catalytic cracking products and catalyst evaluation, so that pyrolysis and catalytic reactions can be carried out heterogeneously, thereby better reflecting the treatment effect of the catalyst on harmful substances and improving the accuracy of catalyst evaluation.

[0005] The utility model is realized through the following technical solutions:

[0006] A device for online monitoring of heterogeneous catalytic cracking products and evaluation of catalysts includes a pyrolysis reactor and a catalytic reactor. The pyrolysis reactor and the catalytic reactor are connected by a conveying pipeline. The conveying pipeline is used to convey the pyrolysis products in the pyrolysis reactor to the catalytic reactor. The exhaust port of the catalytic reactor is connected to a monitoring and evaluation module through an exhaust pipeline. The exhaust pipeline is used to convey the heterogeneous catalytic cracking products in the catalytic reactor to the monitoring and evaluation module. An exhaust gas collection component is provided below the conveying pipeline. The air inlet of the exhaust gas collection component is connected to a gas collecting pipeline. The exhaust gas collection component is connected to the conveying pipeline and the exhaust pipeline through the gas collecting pipeline.

[0007] As a preferred embodiment of the above-mentioned device, the conveying pipeline includes a high-temperature resistant isolating valve, the inlet end of the high-temperature resistant isolating valve is connected to the gas outlet of the pyrolysis reactor through three-way pipe one, and the outlet end of the high-temperature resistant isolating valve is connected to the gas inlet of the catalytic reactor through three-way pipe two. The exhaust pipeline includes a guide pipe whose end is connected to the monitoring and evaluation module, and the head end of the guide pipe is connected to the gas outlet of the catalytic reactor through three-way pipe three. The exhaust gas collection assembly is respectively connected to three-way pipe one and three-way pipe three through the gas collecting pipeline.

[0008] As a preferred embodiment of the above-mentioned device, the gas collection pipeline includes a three-way valve 1 and an exhaust pipe. The three ports of the three-way valve 1 are respectively connected to the exhaust pipe, three-way pipe 1 and three-way pipe 3, and the end of the exhaust pipe is connected to the exhaust collection assembly.

[0009] As a preferred embodiment of the above-mentioned device, the pyrolysis reactor includes a pyrolysis tube connected to a three-way pipe 1, a sealing cover arranged on the top of the pyrolysis tube, a first purge pipe arranged on one side of the sealing cover, a three-way valve 2 arranged at the bottom of the pyrolysis tube, and a first fluidizing pipe and an air transmission pipe respectively connected to the other two ports of the three-way valve 2.

[0010] As a preferred embodiment of the above-mentioned device, the catalytic reactor includes an air inlet pipe connected to the second phase of the tee pipe, one end of the air inlet pipe extends downward to form a reducer, one end of the reducer pipe bends upward and extends to form an air outlet pipe, the upper end of the air outlet pipe is connected to the third phase of the tee pipe, and a second purge pipe is provided at the upper end of the third phase of the tee pipe.

[0011] As a preferred embodiment of the above-mentioned device, it also includes a heating assembly, which includes two heating cylinders respectively arranged on the outside of the pyrolysis reactor and the outside of the catalytic reactor, two temperature sensing elements respectively embedded in the pyrolysis reactor and the catalytic reactor, and a lifting assembly whose output end is connected to the heating cylinder outside the catalytic reactor.

[0012] As a preferred embodiment of the above-mentioned device, the exhaust gas collection assembly includes a mounting frame, on which a telescopic tube is provided. The air inlet at one end of the telescopic tube is connected to the exhaust gas pipe, and the other end of the telescopic tube is closed by an end plate. The end plate is slidably mounted on the mounting frame and can slide back and forth along the telescopic direction of the telescopic tube.

[0013] As a preferred solution of the above device, a pressure plate is slidably provided on the mounting frame, and a linear driving member for pushing the pressure plate to squeeze or move away from the end plate is provided on one side of the mounting frame.

[0014] As a preferred solution of the above device, the lower portion of the exhaust pipe has a circuitous section, and a heat dissipation component is provided on the circuitous section of the exhaust pipe.

[0015] Compared with the prior art, the present invention has the following advantages:

[0016] 1. The utility model provides an online monitoring device for heterogeneous catalytic cracking products and catalyst evaluation, which uses heterogeneous catalysis to conduct experiments on tobacco. The tobacco is pyrolyzed in a pyrolysis reactor, and the pyrolysis products enter the catalytic reactor through a conveying pipeline for catalytic cracking. The components of the heterogeneous catalytic cracking products are analyzed by a monitoring and evaluation module, thereby evaluating the catalyst in the catalytic reactor. This facilitates the separation of coke produced in the pyrolysis and catalytic cracking reactions, avoids the phenomenon of air entering the catalytic reactor during sampling, and prevents catalyst calcination and regeneration during the experiment. The temperature of the pyrolysis and catalytic cracking reactions can be independently controlled to avoid rapid failure of the catalyst, and can accurately reflect the treatment effect of the catalyst on tobacco pyrolysis products.

[0017] 2. The utility model provides an online monitoring device for heterogeneous catalytic cracking products and catalyst evaluation. Before and after the heterogeneous catalytic cracking experiment, the air in the pyrolysis reactor and the catalytic reactor or the residual waste gas after the reaction is input into the waste gas collection component through the carrier gas by regulating the opening and closing status of the delivery pipeline and the exhaust pipeline. The gas storage chamber inside the waste gas collection component is a retractable telescopic tube with a variable volume. While sealing the tobacco waste gas, it ensures that the gas storage capacity is sufficient and avoids excessive air pressure in the gas storage chamber, thereby preventing the tobacco catalytic cracking reaction from polluting the laboratory environment and facilitating the treatment of the waste gas generated by the experiment.

[0018] 3. The utility model provides an online monitoring device for heterogeneous catalytic cracking products and catalyst evaluation, wherein the exhaust gas collection component is connected to the delivery pipeline and the exhaust pipeline through a gas collecting pipeline, thereby realizing the collection of experimental exhaust gas, and the exhaust gas is input into the exhaust gas collection component through the exhaust pipe. One side of the exhaust pipe is bent downward and meanders at the bottom to form a circuitous section. A heat dissipation component is provided at the circuitous section to reduce the temperature of the input exhaust gas and avoid overheating of the exhaust gas collection component. The heat dissipation component is located below the delivery pipeline and the exhaust pipeline, preventing the heat dissipation process from significantly lowering the temperature of the pyrolysis reactor and the catalytic reactor, thereby reducing the heat loss of subsequent catalytic experiments. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 It is a three-dimensional diagram of the overall structure of the utility model;

[0020] Figure 2 It is a top view of the utility model;

[0021] Figure 3 It is a structural schematic diagram of the pyrolysis reactor and catalytic reactor of the utility model;

[0022] Figure 4 It is a structural schematic diagram of the heating component of the present utility model.

[0023] Numbers in the figure:

[0024] 1. Pyrolysis reactor;

[0025] 11. Pyrolysis tube; 12. Sealing cover; 13. First purge tube; 14. Three-way valve 2; 15. First fluidizing tube; 16. Air transmission tube;

[0026] 2. Catalytic reactor;

[0027] 21. Tee pipe 2; 22. Air inlet pipe; 23. Reducer; 24. Air outlet pipe; 25. Second purge pipe;

[0028] 3. Delivery pipeline;

[0029] 31. High temperature resistant isolation valve; 32. Three-way pipe 1;

[0030] 4. Exhaust pipe;

[0031] 41. Draft tube; 42. Tee pipe three;

[0032] 5. Monitoring and evaluation module;

[0033] 6. Exhaust gas collection components;

[0034] 61. Mounting frame; 62. Telescopic tube; 63. End plate; 64. Pressing plate; 65. Linear drive member;

[0035] 7. Gas gathering pipeline;

[0036] 71. Three-way valve 1; 72. Exhaust pipe;

[0037] 8. Heat dissipation components;

[0038] 9. Heating component;

[0039] 91. Heating tube; 92. Temperature sensing element; 93. Lifting assembly. DETAILED DESCRIPTION

[0040] The following is a detailed description of an embodiment of the present invention. This embodiment is implemented based on the technical solution of the present invention, and provides a detailed implementation method and specific operation process. However, the protection scope of the present invention is not limited to the following embodiment.

[0041] See Figure to Figure 4This embodiment discloses an online monitoring and catalyst evaluation device for heterogeneous catalytic cracking products, including a pyrolysis reactor 1, a catalytic reactor 2, and a heating assembly 9. The pyrolysis reactor 1 and the catalytic reactor 2 are connected by a conveying pipeline 3. The conveying pipeline 3 is used to convey the pyrolysis products in the pyrolysis reactor 1 to the catalytic reactor 2. The exhaust port of the catalytic reactor 2 is connected to the monitoring and evaluation module 5 through an exhaust pipeline 4. The exhaust pipeline 4 is used to convey the heterogeneous catalytic cracking products in the catalytic reactor 2 to the monitoring and evaluation module 5; the monitoring and evaluation module 5 is used to analyze the composition and concentration of the heterogeneous catalytic cracking products. The monitoring and evaluation module 5 is preferably a vacuum ultraviolet photoionization time-of-flight mass spectrometer. The pyrolysis products in the pyrolysis reactor 1 undergo catalytic conversion in the catalytic reactor 2 to generate heterogeneous catalytic cracking products. The heterogeneous catalytic cracking products are ionized by vacuum ultraviolet light of .eV, and the generated ions enter the time-of-flight mass spectrometer for analysis. An exhaust gas collecting assembly 6 is provided below the delivery pipeline 3 , and an air inlet of the exhaust gas collecting assembly 6 is connected to a gas collecting pipeline 7 . The exhaust gas collecting assembly 6 is connected to the delivery pipeline 3 and the exhaust pipeline 4 through the gas collecting pipeline 7 .

[0042] Prior to the heterogeneous catalytic cracking experiment, a carrier gas was introduced into the pyrolysis reactor 1 and the catalytic reactor 2. This carrier gas was preferably nitrogen, but an inert gas could also be used. The air in the pyrolysis reactor 1 and the catalytic reactor 2 entered the gas collection pipeline 7 through the delivery pipeline 3 and the exhaust pipeline 4, respectively, to regulate the atmosphere within the pyrolysis reactor 1 and the catalytic reactor 2. During the heterogeneous catalytic cracking experiment, the pyrolysis reactor 1 and the catalytic reactor 2 were first preheated. After preheating, the tobacco sample was loaded into the pyrolysis reactor 1 for pyrolysis to generate pyrolysis products. The delivery pipeline 3 was opened to allow the pyrolysis products to enter the catalytic reactor 2 for catalytic cracking, generating heterogeneous catalytic cracking products. These heterogeneous catalytic cracking products were then transported via the exhaust pipeline 4 to the monitoring and evaluation module 5. The monitoring and evaluation module 5 analyzed the composition and concentration of the heterogeneous catalytic cracking products to evaluate the catalyst's treatment effect on the pyrolysis products. Afterwards, carrier gas was again introduced into the pyrolysis reactor 1 and the catalytic reactor 2. The exhaust gas from the pyrolysis reactor 1 and the catalytic reactor 2 entered the gas collection pipeline 7 through the delivery pipeline 3 and the exhaust pipeline 4, respectively, and was stored by the exhaust gas collection assembly 6. Following the above process, multiple ex situ catalytic cracking experiments were conducted to analyze the treatment effect and service life of the catalyst.

[0043] The conveying pipeline 3 comprises a high-temperature-resistant cut-off valve 31, the inlet end of the high-temperature-resistant cut-off valve 31 is connected with the outlet of the pyrolysis reactor 1 through a three-way pipe 1, the outlet end of the high-temperature-resistant cut-off valve 31 is connected with the inlet of the catalytic reactor 2 through a three-way pipe 2, the exhaust pipeline 4 comprises a flow guide pipe 41 connected with the monitoring and evaluation module 5 at the tail end, the outer side of the flow guide pipe 41 is provided with a heat preservation coating, the head end of the flow guide pipe 41 is connected with the outlet of the catalytic reactor 2 through a three-way pipe 3, and the exhaust gas collecting assembly 6 is connected with the three-way pipe 1 and the three-way pipe 3 through a gas collecting pipeline 7. The gas collecting pipeline 7 comprises a three-way valve 1 and an exhaust pipe 2, the three ports of the three-way valve 1 are connected with the exhaust pipe 2, the three-way pipe 1 and the three-way pipe 3 respectively, and the tail end of the exhaust pipe 2 is connected with the exhaust gas collecting assembly 6. During the sampling process of each ectopic catalytic cracking experiment, the high-temperature-resistant cut-off valve 31 is closed, the port of the three-way valve 1 connected with the three-way pipe 3 is closed, and the other two ports of the three-way valve 1 are opened, so that air in the pyrolysis reactor 1 is prevented from entering the catalytic reactor 2 through the conveying pipeline 3 during sampling, the catalyst in the catalytic reactor 2 is prevented from being calcined and regenerated, and the accuracy of catalyst evaluation is improved. After sampling, the carrier gas is continuously introduced into the pyrolysis reactor 1, the air in the pyrolysis reactor 1 is discharged to the gas collecting pipeline 7 through the three-way pipe 1, then the three ports of the three-way valve 1 are closed, the high-temperature-resistant cut-off valve 31 is opened, and the pyrolysis products can flow to the catalytic reactor 2 through the conveying pipeline 3.

[0044] The exhaust gas collecting assembly 6 comprises a mounting frame 61, the mounting frame 61 is provided with an extension pipe 62, a connecting plate fixed at one end of the extension pipe 62 is provided with an air inlet, the air inlet of the connecting plate is connected with the exhaust pipe 2, the other end of the extension pipe 62 is closed through an end plate 63, the end plate 63 is slidably arranged on the mounting frame 61 and can slide back and forth along the extension direction of the extension pipe 62. A pressing plate 64 is slidably arranged on the mounting frame 61, and the mounting frame 61 is provided with a plurality of sliding shafts, the pressing plate 64 and the end plate 63 are respectively slidably arranged on the sliding shafts. A linear drive 65 for pushing the pressing plate 64 to press or move away from the end plate 63 is arranged on one side of the mounting frame 61. The linear drive 65 can be an electric push rod, an air cylinder or a hydraulic cylinder, etc. having a linear extension function. An exhaust valve is arranged on the extension pipe 62, the exhaust valve is connected with an air purification device, according to the composition of the exhaust gas in the extension pipe 62, a corresponding type of air purification device can be selected, when purifying the gas in the extension pipe 62, the pressing plate 64 is pressed by the linear drive 65 to press the end plate 63, so that the extension pipe 62 is folded and compressed, and the gas in the extension pipe 62 is discharged from the exhaust valve. In addition, the air outlet of the monitoring and evaluation module 5 is also connected with an air purification device, and the air purification device connected with the monitoring and evaluation module 5 and the air purification device connected with the extension pipe 62 can be the same device.

[0045] The exhaust pipe 72 has a circuitous section at its lower portion, on which a heat sink assembly 8 is installed. This heat sink assembly 8 is preferably a heat sink fin, with a fan positioned on one side of the fin. Alternatively, a cold head can be attached to the side of the fin, and a corresponding water cooling device can be provided. The heat sink assembly 8, located in the circuitous section at the lower portion of the exhaust pipe 72, reduces heat loss to the pyrolysis reactor 1 and catalytic reactor 2, thereby improving energy efficiency during subsequent ex situ catalytic cracking experiments.

[0046] The pyrolysis reactor 1 includes a pyrolysis tube 11 connected to a three-way pipe 32, a sealing cap 12 disposed at the top of the pyrolysis tube 11, a first purge pipe 13 disposed on one side of the sealing cap 12, a three-way valve 14 disposed at the bottom of the pyrolysis tube 11, and a first fluidizing pipe 15 and an air delivery pipe 16 connected to the remaining two ports of the three-way valve 14. The catalytic reactor 2 includes an inlet pipe 22 connected to the two-way pipe 21. One end of the inlet pipe 22 extends downward to form a reducer 23, which bends upward to form an outlet pipe 24. The upper end of the outlet pipe 24 is connected to the three-way pipe 42, which has a second purge pipe 25 disposed at its upper end. The upper end of the outlet pipe 24 is the exhaust port of the catalytic reactor 2. The cross-sectional area of ​​the reducer 23 is larger than the cross-sectional area of ​​the inlet pipe 22. A quartz sand core layer is provided inside the reducer 23 and the pyrolysis tube 11. The tobacco sample undergoes a pyrolysis reaction in the quartz sand core layer inside the pyrolysis tube 11, and the pyrolysis product undergoes a catalytic cracking reaction in the quartz sand core layer inside the reducer 23.

[0047] The heating assembly 9 includes two heating tubes 91 respectively arranged on the outside of the pyrolysis reactor 1 and the outside of the catalytic reactor 2, two temperature sensing elements 92 respectively embedded in the pyrolysis reactor 1 and the catalytic reactor 2, and a lifting assembly 93 whose output end is connected to the heating tube 91 on the outside of the catalytic reactor 2. The temperature sensing element 92 is preferably a thermocouple. The thermocouple in the pyrolysis reactor 1 passes through the sealing cover 12 and extends downward to the inside of the pyrolysis tube 11. The thermocouple in the catalytic reactor 2 passes through the second purge pipe 25 and extends downward to the inside of the reducer 23. The heating tube 91 has a built-in spiral heating coil. The preheating temperature of the pyrolysis reactor 1 and the preheating temperature of the catalytic reactor 2 can be set according to the selection. For example, the preheating temperature of the pyrolysis reactor 1 can be set to ℃, and the preheating temperature of the catalytic reactor 2 can be set to ℃. The lifting assembly 93 is preferably a screw drive device for adjusting the position of the heating center of the heating tube 91 to improve the heating effect of the catalytic reactor 2. Before, during, and after the heterogeneous catalytic cracking experiments, carrier gas was introduced into the pyrolysis tube 11 of pyrolysis reactor 1 through the first purge tube 13 and the first fluidizing tube 15, and carrier gas was introduced into the air inlet 22 of catalytic reactor 2 through the second purge tube 25. After the previous heterogeneous catalytic cracking experiment and before the next heterogeneous catalytic cracking experiment, air was introduced into the pyrolysis tube 11 of pyrolysis reactor 1 through the air delivery tube 16 to calcine the coke generated in the pyrolysis tube 11 and prevent contamination of the quartz sand core layer by the coke in the pyrolysis reactor 1.

[0048] The above are only preferred embodiments of the present invention and are not intended to limit the present invention. Any modifications, equivalent replacements and improvements made within the spirit and principles of the present invention should be included in the scope of protection of the present invention.

Claims

1. An online monitoring device for heterogeneous catalytic cracking products and catalyst evaluation, characterized by: It includes a pyrolysis reactor and a catalytic reactor. The pyrolysis reactor and the catalytic reactor are connected by a conveying pipeline. The conveying pipeline is used to convey the pyrolysis products in the pyrolysis reactor to the catalytic reactor. The exhaust port of the catalytic reactor is connected to the monitoring and evaluation module through the exhaust pipeline. The exhaust pipeline is used to convey the heterogeneous catalytic cracking products in the catalytic reactor to the monitoring and evaluation module; an exhaust gas collection component is provided below the conveying pipeline, the air inlet of the exhaust gas collection component is connected to the gas collecting pipeline, and the exhaust gas collection component is connected to the conveying pipeline and the exhaust pipeline through the gas collecting pipeline.

2. The device for online monitoring of heterogeneous catalytic cracking products and evaluation of catalysts according to claim 1, characterized in that: The conveying pipeline includes a high-temperature resistant isolation valve, the inlet end of the high-temperature resistant isolation valve is connected to the outlet of the pyrolysis reactor through three-way pipe one, and the outlet end of the high-temperature resistant isolation valve is connected to the inlet of the catalytic reactor through three-way pipe two. The exhaust pipeline includes a guide pipe whose end is connected to the monitoring and evaluation module, and the head end of the guide pipe is connected to the outlet of the catalytic reactor through three-way pipe three. The exhaust gas collection component is respectively connected to three-way pipe one and three-way pipe three through the gas collecting pipeline.

3. The device for online monitoring of heterogeneous catalytic cracking products and evaluation of catalysts according to claim 2, characterized in that: The gas collection pipeline includes a three-way valve 1 and an exhaust pipe. The three ports of the three-way valve 1 are respectively connected to the exhaust pipe, three-way pipe 1 and three-way pipe 3. The end of the exhaust pipe is connected to the exhaust gas collection component.

4. The device for online monitoring of heterogeneous catalytic cracking products and evaluation of catalysts according to claim 2, characterized in that: The pyrolysis reactor includes a pyrolysis tube connected to a three-way pipe, a sealing cover arranged on the top of the pyrolysis tube, a first purge pipe arranged on one side of the sealing cover, a three-way valve 2 arranged at the bottom of the pyrolysis tube, and a first fluidizing pipe and an air transmission pipe respectively connected to the other two ports of the three-way valve 2.

5. The device for online monitoring of heterogeneous catalytic cracking products and evaluation of catalysts according to claim 2, characterized in that: The catalytic reactor includes an air inlet pipe connected to the second phase of the tee pipe, one end of the air inlet pipe extends downward to form a reducer, one end of the reducer bends upward to form an air outlet pipe, the upper end of the air outlet pipe is connected to the third phase of the tee pipe, and the upper end of the third phase of the tee pipe is provided with a second purge pipe.

6. The device for online monitoring of heterogeneous catalytic cracking products and evaluation of catalysts according to claim 1, characterized in that: It also includes a heating assembly, which includes two heating cylinders respectively arranged on the outside of the pyrolysis reactor and the outside of the catalytic reactor, two temperature sensing elements respectively embedded in the pyrolysis reactor and the catalytic reactor, and a lifting assembly whose output end is connected to the heating cylinder outside the catalytic reactor.

7. The device for online monitoring of heterogeneous catalytic cracking products and evaluation of catalysts according to claim 3, characterized in that: The exhaust gas collection assembly includes a mounting frame, on which a telescopic tube is provided. The air inlet at one end of the telescopic tube is connected to the exhaust pipe, and the other end of the telescopic tube is closed by an end plate. The end plate is slidably mounted on the mounting frame and can slide back and forth along the telescopic direction of the telescopic tube.

8. The device for online monitoring of heterogeneous catalytic cracking products and evaluation of catalysts according to claim 7, characterized in that: A pressing plate is slidably provided on the mounting frame, and a linear driving member for pushing the pressing plate to squeeze or move away from the end plate is provided on one side of the mounting frame.

9. The device for online monitoring of heterogeneous catalytic cracking products and evaluation of catalysts according to claim 7, characterized in that: The lower part of the exhaust pipe is provided with a circuitous section, and the circuitous section of the exhaust pipe is provided with a heat dissipation component.

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