Carbon-based catalyst performance test device and test method
By designing a performance test device for carbon-based catalysts, multiple adsorption and regeneration tests of carbon-based catalysts have been achieved, which solves the problem that existing equipment cannot simulate the actual environment and improves the accuracy and flexibility of the test data.
Patent Information
- Application Number
- CN202510673605.5
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- Filing Date
- 2025-05-23
- Publication Date
- 2025-07-29
AI Technical Summary
The existing carbon-based catalyst performance test equipment is difficult to simulate the actual flue gas composition and adsorption environment, and cannot meet the needs of multiple adsorption and regeneration processes of carbon-based catalysts, resulting in too large differences in the test data and actual operating conditions.
A carbon-based catalyst performance test device is designed, including a test chamber, reaction tube, flue gas pipeline and regeneration gas pipeline. The reaction tube is independently adjusted. By simulating the temperature environment, multiple adsorption and regeneration tests of the carbon-based catalyst are realized. The catalyst loading and unloading is controlled by using a movable plate to ensure independent gas in and discharge.
It improves the data accuracy and flexibility of repeated reactions in carbon-based catalyst tests, simulates the adsorption and regeneration process in practical applications, and improves the reliability and accuracy of test results.
Smart Images
Figure CN120385784A_ABST
Abstract
Description
Technical Field
[0001] This application relates to the technical field of catalyst test equipment, and particularly to a performance test device and test method for carbon-based catalysts. Background Art
[0002] The carbon-based catalytic method for synergistic control of multiple flue gas pollutants is a method that can effectively remove various pollutants such as SOx, NOx, and soot in flue gas. At the same time, the carbon-based catalyst can be recycled after being regenerated to restore its activity, which has important practical value for the up-to-standard discharge of flue gas; however, the regeneration process will cause non-linear changes in the desorption effect of the carbon-based catalyst on the pollutants in the flue gas. Therefore, it is necessary to test the pollutant removal performance and cyclic regeneration performance of the carbon-based catalyst before it is put into operation. Since the test process of the cyclic regeneration performance requires multiple adsorption and regeneration of the carbon-based catalyst, the current test equipment is limited by the test environment and is difficult to simulate the actual flue gas composition and adsorption environment, and it is difficult to meet the requirement of multiple repeated reactions in the adsorption-regeneration process of the carbon-based catalyst, resulting in a large difference between the test data and the actual operating conditions.
[0003] Therefore, how to meet the repeated reaction requirements of the carbon-based catalyst in the performance test process and improve the accuracy of the test data is a technical problem that needs to be solved urgently by those skilled in the art. Summary of the Invention
[0004] In view of this, the purpose of this application is to provide a performance test device for carbon-based catalysts to meet the repeated reaction requirements of the carbon-based catalyst in the performance test process and improve the accuracy of the test data.
[0005] Another purpose of this application is to provide a test method for catalyst performance test using the above-mentioned performance test device for carbon-based catalysts.
[0006] To achieve the above purpose, this application provides the following technical solutions:
[0007] A performance test device for carbon-based catalysts, characterized by comprising:
[0008] A test chamber, which is a closed chamber and is provided with an air inlet and an air outlet at intervals. Inside the test chamber, multiple reaction tubes are arranged at intervals. The reaction tube is a hollow cavity structure and its two ends open out of the test chamber. The reaction tube is used to accommodate the carbon-based catalyst;
[0009] A flue gas pipeline and a regeneration gas pipeline. The flue gas pipeline is connected to the two open ends of the reaction tube, and the regeneration gas pipeline is connected to the two open ends of the reaction tube, and the flue gas pipeline and the regeneration gas pipeline are independently adjustable;
[0010] The discharging section is arranged at the bottom of the test chamber. The discharging section includes a movable plate which is arranged at the bottom of the reaction tube and can open and close the bottom opening of the reaction tube through sliding.
[0011] Preferably, in the above carbon-based catalyst performance test device, a pipe cap is suspended and arranged at the bottom of the reaction tube. The outer diameter of the top of the pipe cap is larger than the outer diameter of the reaction tube, and it is arranged at an interval from the bottom opening of the reaction tube, and the pipe cap tapers towards its bottom.
[0012] Communication holes are formed in the movable plate and correspond to the pipe caps one by one. When the movable plate moves to the communication position, the bottom opening of the pipe cap is aligned and communicated with the communication hole. When the movable plate leaves the communication position, the bottom opening of the pipe cap is closed.
[0013] Preferably, in the above carbon-based catalyst performance test device, the bottom of the pipe cap and the movable plate are arranged at a vertical distance of 2 mm - 5 mm.
[0014] Preferably, in the above carbon-based catalyst performance test device, a first guiding section is arranged at the top of the test chamber. The large end of the first guiding section fits the top of the test chamber to cover the top openings of all the reaction tubes, and at least two branch paths are led out from the small end of the first guiding section and are respectively provided with opening and closing valves.
[0015] Preferably, in the above carbon-based catalyst performance test device, a second guiding section is arranged at the bottom of the discharging section. The large end of the second guiding section contacts the bottom of the discharging section, and at least three branch paths are led out from the small end of the second guiding section and are respectively provided with opening and closing valves.
[0016] Preferably, in the above carbon-based catalyst performance test device, the inclined plane angle of the first guiding section is not less than 30°; the inclined plane angle of the second guiding section is not less than 45°.
[0017] Preferably, in the above carbon-based catalyst performance test device, multiple reaction tubes are arranged in parallel, and the reaction tubes are arranged at an interval from the inner wall of the test chamber.
[0018] Preferably, in the above carbon-based catalyst performance test device, the flow paths of the flue gas pipeline and the regeneration gas pipeline in the reaction tube are opposite.
[0019] Preferably, in the above carbon-based catalyst performance test device, baffle plates are alternately arranged on the inner wall of the test chamber in the vertical direction, and the air inlet and the air outlet are arranged on both sides of the baffle plates in the vertical direction.
[0020] A test method uses the carbon-based catalyst performance test device described in any of the above embodiments to conduct a performance test on a carbon-based catalyst. The test method at least includes the following steps:
[0021] Loading: Close the bottom opening of the reaction tube through the movable plate and load the carbon-based catalyst to the required height for the test from the top of the reaction tube.
[0022] Testing chamber environment simulation: Introduce hot air at the same temperature as the test flue gas from the inlet of the testing chamber and form a cycle through the outlet.
[0023] Adsorption test: Close the regeneration gas pipeline and open the flue gas pipeline. Keep the outer periphery of the reaction tube at the test temperature, and inside, pass the flue gas to react with the carbon-based catalyst by adsorption.
[0024] Regeneration test: Close the flue gas pipeline and open the regeneration gas pipeline. Introduce nitrogen and the ventilation time of a single reaction tube is greater than the ratio of its volume to the nitrogen flow rate. Introduce hot air at the preset regeneration temperature from the inlet of the testing chamber and form a cycle through the outlet. After the temperature of the testing chamber reaches the set temperature, keep the reaction tube for the first preset duration to complete the regeneration test.
[0025] Repeat the adsorption test step and the regeneration test step until the required number of adsorption-regeneration cycles of the carbon-based catalyst is met.
[0026] Catalyst cooling: Keep one of the flue gas pipeline and the regeneration gas pipeline open and introduce heat exchange air into the reaction tube. The inlet temperature of the heat exchange air is the same as the catalyst cooling temperature, and stop the ventilation after the temperature at the outlet position of the reaction tube remains stable.
[0027] Unloading: Move the movable plate to open the reaction tube, and the catalyst falls off from the reaction tube under the action of gravity and is collected.
[0028] As can be seen from the above technical solutions, the carbon-based catalyst performance test device provided by the present disclosure uses multiple reaction tubes arranged at intervals to carry the carbon-based catalyst. Flue gas or regeneration gas can come into full contact with the carbon-based catalyst through the reaction tubes. The multiple spaced reaction tubes can disperse the carbon-based catalyst, and a test chamber is used to simulate the flue gas temperature environment outside the reaction tubes. Both ends of the reaction tubes are provided with flue gas pipelines and regeneration gas pipelines. The flue gas pipelines and regeneration gas pipelines are independently adjusted for opening and closing, and are both connected to the two ends of the reaction tubes. After the temperature simulation of the flue gas and regeneration gas in the test chamber, they are introduced into the reaction tubes as needed to react with the carbon-based catalyst. This avoids the problem of uneven boundary temperature during the reaction of the current catalyst. The reaction tubes are suspended in the test chamber to improve the temperature uniformity during the reaction of the carbon-based catalyst and the full degree of contact between the carbon-based catalyst and the gas, thereby improving the data accuracy of the carbon-based catalyst performance test; and through the provision of flue gas pipelines and regeneration gas pipelines, the repeated reaction requirements during the performance test of the carbon-based catalyst are met. BRIEF DESCRIPTION OF THE DRAWINGS
[0029] In order to more clearly illustrate the technical solutions in the embodiments of the present application or the prior art, the following will briefly introduce the drawings required for the description of the embodiments or the prior art. Obviously, the following drawings are only some embodiments of the present application. For those of ordinary skill in the art, without creative efforts, other drawings can also be obtained based on these drawings.
[0030] Figure 1 Structural schematic diagram of the carbon-based catalyst performance test device provided by the present disclosure;
[0031] Figure 2 Structural schematic diagram of the pipe cap;
[0032] Figure 3 Top view of the mating structure of the pipe cap and the movable plate;
[0033] Figure 4 For Figure 3 front view.
[0034] Wherein, 10 - test chamber; 110 - air inlet; 120 - air outlet; 130 - baffle plate; 20 - reaction tube; 30 - discharging section; 310 - movable plate; 3110 - communication hole; 40 - pipe cap; 50 - first guiding section; 510 - first on-off valve; 520 - second on-off valve; 60 - second guiding section; 610 - third on-off valve; 620 - fourth on-off valve; 630 - fifth on-off valve. DETAILED DESCRIPTION OF THE EMBODIMENTS
[0035] The core of this application lies in disclosing a performance test device for carbon-based catalysts to meet the repetitive reaction requirements during the performance test of carbon-based catalysts and improve the accuracy of test data.
[0036] Another object of this application is to provide a test method for catalyst performance test using the above-mentioned performance test device for carbon-based catalysts.
[0037] To enable those skilled in the art to better understand the solution of this application, the embodiments of this application will be described below with reference to the accompanying drawings. In addition, the embodiments shown below do not impose any limitation on the content of the invention recorded in the claims. Furthermore, all the content of the configurations shown in the following embodiments is not limited to what is necessary for the solution of the invention recorded in the claims.
[0038] As Figure 1 and Figure 2 shown, this disclosure provides a performance test device for carbon-based catalysts, which mainly includes a test chamber 10, a reaction tube 20, a flue gas pipeline, a regeneration gas pipeline, and a discharging section 30. Among them, the test chamber 10 is a closed cavity for simulating the temperature environment during the reaction of carbon-based catalysts. An air inlet 110 and an air outlet 120 are spaced apart on the side wall of the test chamber 10 to allow high-temperature gas to enter and circulate, thereby realizing the simulation of the reaction environment in the test chamber 10.
[0039] On this basis, a plurality of reaction tubes 20 are spaced inside the test chamber 10. The reaction tube 20 is a hollow cavity structure for accommodating the carbon-based catalyst and serving as the reaction site for the carbon-based catalyst. It should be noted that the reaction tubes 20 are spaced in the test chamber 10 so that the outer periphery of each single reaction tube 20 is surrounded by air at a preset temperature in the test chamber 10, and the periphery of the carbon-based catalyst disposed inside the reaction tube 20 is surrounded by a preset temperature environment, thereby improving the accuracy of the reaction process of the carbon-based catalyst. At the same time, it should be noted that the reaction tubes 20 are arranged in a suspended manner, which enables the carbon-based catalyst to be vertically arranged in the test chamber 10 instead of a simple stacking form. As a result, the temperature distribution on the outer periphery of the carbon-based catalyst is more uniform, and the lower packing density inside the carbon-based catalyst improves the contact sufficiency between the carbon-based catalyst and the gas, thereby improving the data accuracy of the reaction process.
[0040] Furthermore, the reaction tube 20 with a hollow cavity structure has openings at both ends and extends out of the test chamber 10, and the flue gas pipeline is connected to the openings at both ends of the reaction tube 20 to enable the circulation supply of flue gas in the reaction tube 20; while the two ends of the regeneration gas pipeline are also connected to the openings at both ends of the reaction tube 20 to enable the circulation supply of regeneration gas in the reaction tube 20. It should be noted that the flue gas pipeline and the regeneration gas pipeline can be independently adjusted to separately control the introduction of flue gas and regeneration gas as needed. During the adsorption test, only the flue gas pipeline is opened to allow the flue gas to pass through the reaction tube 20 and react with the carbon-based catalyst by adsorption; while in the regeneration test stage, the flue gas pipeline is closed and the regeneration gas pipeline is opened to introduce nitrogen to regenerate the catalyst. This independent adjustment function makes the test process more flexible, can accurately simulate the adsorption and regeneration processes of the carbon-based catalyst in actual applications, and provides experimental support for studying the performance of the catalyst.
[0041] The discharging section 30 is arranged at the bottom of the test chamber 10. It includes a movable plate 310, and for the convenience of the adjustment process, the movable plate 310 is slidably arranged. The movable plate 310 is arranged at the bottom of the reaction tube 20 and is provided with a communication hole 3110, so that during the sliding process of the movable plate 310, the opening and closing of the bottom opening of the reaction tube 20 can be adjusted by means of the corresponding state of the communication hole 3110 and the bottom opening of the reaction tube 20. When the bottom opening of the reaction tube 20 is closed, the carbon-based catalyst can be kept in a stored state in the reaction tube 20, and when the bottom opening of the reaction tube 20 is opened, the carbon-based catalyst can fall off from the reaction tube 20 under the action of gravity and be collected.
[0042] In summary, the performance test device for the carbon-based catalyst of this embodiment provides an efficient, flexible and more accurate test result platform for the performance test of the carbon-based catalyst through the structures and functions of the test chamber 10, the reaction tube 20, the flue gas pipeline, the regeneration gas pipeline and the discharging section 30, and can effectively simulate the adsorption and regeneration processes of the catalyst to realize the adsorption test, regeneration experiment or adsorption-regeneration performance composite test of the carbon-based catalyst, and provides an effective test tool for studying the performance of the carbon-based catalyst and optimizing the production process.
[0043] On the basis of the above embodiments, in order to ensure the stability of the reaction tube 20 during use, a tube cap 40 is further provided at the bottom of the reaction tube 20. The tube cap 40 is disposed between the reaction tube 20 and the movable plate 310. In order to allow gas to enter, the tube cap 40 is suspended at the bottom of the reaction tube 20. The outer diameter of the top of the tube cap 40 is larger than the outer diameter of the reaction tube 20, so that the gas to be introduced into the reaction tube 20 can enter the reaction tube 20 through the periphery of the tube cap 40. At the same time, it should be noted that the tube cap 40 has an inverted frustum or pyramid structure, forming a shape similar to a flared opening. It is disposed at the bottom of the reaction tube 20 to be able to carry the carbon-based catalyst, and the opening is contracted to reduce the risk of abnormal shedding of the carbon-based catalyst.
[0044] As Figure 3 and Figure 4 shown, the movable plate 310 is provided with communication holes 3110. The communication holes 3110 specifically correspond to the tube caps 40 one by one. Here, one-to-one correspondence specifically means that the number of communication holes 3110 opened is the same as that of the tube caps 40. At the same time, when the movable plate 310 is located at the position where the reaction tube 20 is opened, the bottom opening of each tube cap 40 corresponds to a communication hole 3110. On this basis, when the movable plate 310 moves to the communication position, the bottom opening of the tube cap 40 is aligned and communicated with the communication hole 3110. At this time, the channel between the bottom of the reaction tube 20 and the discharge section 30 is opened, and the catalyst can be smoothly discharged under the action of gravity. When the movable plate 310 leaves the communication position, the bottom opening of the tube cap 40 is closed, and the carbon-based catalyst is blocked by the movable plate 310 at the bottom of the tube cap 40 and will not fall off, while the gas is communicated to the inside of the reaction tube 20 through the top of the tube cap 40.
[0045] It should be further noted that taking a single reaction tube 20 and a tube cap 40 as an example, the tube cap 40 is suspended, and the distance H between the top of the tube cap 40 and the bottom of the test chamber 10 is set to 10 cm - 15 cm, so that there is a certain distance between the tube cap 40 and the bottom opening of the reaction tube 20; and the minimum distance L between the bottom of the reaction tube 20 and the outer edge of the top of the frustum is set to 1 / 4 - 1 / 2 of the inner diameter of the reaction tube 20 according to the size of the reaction tube 20, so that there is a sufficient gas flow path between the tube cap 40 and the reaction tube 20. For a single tube cap 40, it is preferably set as an inverted frustum structure, and the busbar inclination angle of the frustum-structured tube cap 40 is 40° - 70°, so as to realize the shrinkage limit of the carbon-based catalyst. Preferably, the busbar inclination angle of the tube cap 40 is 55°.
[0046] The mating structure of the reaction tube 20 with the tube cap 40 and the movable plate 310 not only improves the convenience and reliability of loading and unloading the carbon-based catalyst, but also avoids damage to the structure of the test chamber 10 and the reaction tube 20. The operator only needs to adjust the tube cap 40 to achieve the loading and unloading operation of the carbon-based catalyst, avoiding errors caused by equipment differences during multiple tests. It should be noted that, for the convenience of operating the movable plate 310, a 2-mm to 5-mm gap is provided between the bottom of the tube cap 40 and the movable plate 310. This can keep the carbon-based catalyst stable and prevent it from falling off the bottom of the tube cap 40. At the same time, the movable plate 310 can slide and adjust more freely without affecting the structural stability of the tube cap 40 and the reaction tube 20.
[0047] To further optimize the above technical solution, in some embodiments of the present invention, a first guiding section 50 is provided at the top of the test chamber 10. The first guiding section 50 has two end faces with different cross-sectional areas in the vertical direction. Specifically, the large end of the first guiding section 50 is arranged to fit the top of the test chamber 10 to cover the top openings of the respective reaction tubes 20. On the premise of keeping the top of the test chamber 10 sealed, the large end of the first guiding section 50 can cover the opening areas at the tops of each reaction tube 20 to effectively guide the flow of gas. The gas flowing out of the top openings of the respective reaction tubes 20 can be collected by the first guiding section 50, and at the same time, the gas coming from the top of the first guiding section 50 can also reach the top opening positions of each reaction tube 20 to enter the reaction tube 20. Correspondingly, at least two branches are led out from the small end at the top of the first guiding section 50, and an opening and closing valve is provided for each branch. These opening and closing valves can independently control the on-off of each branch according to the test requirements, so as to achieve precise control of the gas supply to different reaction tubes 20.
[0048] Based on the structure of the test device disclosed in the present invention, among the two branches led out from the small end at the top of the first guiding section 50, one is for the flow of flue gas, and the other is for the flow of regeneration gas. When conducting the adsorption or regeneration performance test of the carbon-based catalyst, the opening and closing valves on the two branches are alternately opened to meet the flow requirements of different gases in the reaction tube 20.
[0049] On the basis of the above structure, the bottom of the test chamber 10 is of the structure of the discharging section 30, and a second guiding section 60 is further provided at the bottom of the discharging section 30. Similarly, the second guiding section 60 also has two end faces with different cross-sectional areas in the vertical direction. Specifically, the large end of the second guiding section 60 contacts the bottom of the discharging section 30, and its small end leads out at least three branches, and each branch is respectively provided with an opening and closing valve. It should be noted that for the second guiding section 60 provided at the bottom of the discharging section 30, two of its branches are respectively used for the passage of flue gas and regeneration gas, and the other branch is provided at the bottom of the discharging section 30 in the vertical direction and is used for discharging the carbon-based catalyst. That is, when the carbon-based catalyst needs to react in the reaction tube 20, the two ventilated branches are alternately opened and closed to carry out the corresponding reaction, and the second guiding section 60 is used for the confluence and diffusion of gas; and when it is necessary to discharge the carbon-based catalyst in the reaction tube 20, the second guiding section 60 is used to collect the carbon-based catalyst flowing out from the bottom of the reaction tube 20 and discharge it through the opening and closing valve on the branch.
[0050] In the above embodiment, the setting of the first guiding section 50 and the second guiding section 60 improves the integration degree of the carbon-based catalyst performance test device. Both of them integrate various functional requirements, while maintaining the structural compactness of the test device, reducing the complexity of the test device to optimize the test cost. On this basis, the inclined plane angle of the first guiding section 50 is not less than 30°, so as to ensure that the gas has good flow directionality and uniformity when entering the reaction tube 20. It should be noted that the first guiding section 50 is only used for air flow guiding. Therefore, its smaller inclined plane angle can have a lower height when meeting the requirement of the large end opening, so as to ensure that the gas can quickly diffuse and converge, thereby improving the efficiency of the adsorption and regeneration reaction and reducing the time required to achieve the test conditions. For the inclined plane angle of the second guiding section 60, it is not less than 45°. While meeting the air flow guiding requirement, the inclined plane angle not less than 45° enables the carbon-based catalyst to slide smoothly during discharging, reduces the retention of the catalyst in the guiding section, reduces the friction and accumulation between catalyst particles, and enables the catalyst to be quickly and smoothly discharged from the discharging section 30 under the action of gravity.
[0051] Furthermore, in order to improve the uniformity and stability of the carbon-based catalyst in each reaction tube 20 during the reaction process, in some embodiments of the present invention, multiple reaction tubes 20 are arranged in parallel in the test chamber 10, and the reaction tubes 20 are spaced apart from the inner wall of the test chamber 10. It should be noted that the above layout enables a certain distance to be maintained between the reaction tubes 20 and between the reaction tubes 20 and the inner wall of the test chamber 10, thereby providing sufficient space for the gas to flow in the test chamber 10. Furthermore, the parallel reaction tubes 20 can be under similar environmental conditions, making the test results more comparable and repeatable. At the same time, the spaced arrangement of the reaction tubes 20 and the inner wall of the test chamber 10 helps to evenly distribute the gas in the test chamber 10, avoiding local accumulation or poor flow of the gas in the test chamber 10.
[0052] In order to further improve the test efficiency, in some embodiments of the present invention, the flue gas supplied by the flue gas pipeline and the regeneration gas supplied by the regeneration gas pipeline flow in opposite paths in the reaction tube 20, that is, the two gases can pass through the carbon-based catalyst in the reaction tube 20 in different directions. During the adsorption test stage, the flue gas enters from one end of the reaction tube 20, undergoes an adsorption reaction with the carbon-based catalyst, and then exits from the other end. During the regeneration test stage, the regeneration gas enters from the other end of the reaction tube 20, undergoes a regeneration reaction with the catalyst, and then exits from the end where the flue gas enters. It should be noted that the setting of the opposite flow paths can ensure that the catalyst can come into full contact with the gas during both the adsorption and regeneration processes. At the same time, the opposite flow paths can also reduce the short-circuit phenomenon of the gas in the reaction tube 20 and enable the subsequent gas to more fully discharge the gas already present in the reaction tube 20, thereby improving the accuracy of the test results.
[0053] Such as Figure 1As shown in the figure, for the first guiding section 50, two branch pipelines are arranged at its top, and a first opening and closing valve 510 and a second opening and closing valve 520 are respectively arranged. For the second guiding section 60, a third opening and closing valve 610, a fourth opening and closing valve 620 and a fifth opening and closing valve 630 are arranged at its bottom. When it is necessary to introduce flue gas into the reaction tube 20, the third opening and closing valve 610 and the first opening and closing valve 510 are opened, while the second opening and closing valve 520, the fourth opening and closing valve 620 and the fifth opening and closing valve 630 remain closed, so as to introduce flue gas from the branch where the third opening and closing valve 610 is located and discharge it from the branch where the first opening and closing valve 510 is located. When it is necessary to carry out a regeneration test, the third opening and closing valve 610 and the first opening and closing valve 510 are closed, and at the same time the fifth opening and closing valve 630 is closed. The second opening and closing valve 520 and the fourth opening and closing valve 620 are opened to introduce nitrogen from the branch where the second opening and closing valve 520 is located and discharge it from the branch where the fourth opening and closing valve 620 is located, so as to realize the independent regulation of flue gas and regeneration gas and meet the requirement of flowing in opposite directions in the reaction tube 20. When it is necessary to unload the reaction tube 20, the fifth opening and closing valve 630 can be opened to collect the carbon-based catalyst in the second guiding section 60.
[0054] Furthermore, in order to improve the environmental simulation efficiency of the test chamber 10, in some embodiments of the present invention, baffles 130 are alternately arranged on the inner wall of the test chamber 10 in the vertical direction, and the air inlet 110 and the air outlet 120 are arranged on both sides of the baffles 130 in the vertical direction. The baffles 130 are used to change the flow direction of the gas in the test chamber 10, increase the residence time and contact area of the gas in the test chamber 10. That is, when the gas enters the test chamber 10 from the air inlet 110, the baffles 130 will guide the gas to flow up and down in the test chamber 10, so that the gas path is extended and the gas can fully contact with each reaction tube 20 in the test chamber 10, which improves the utilization rate of the gas and increases the heating rate in the test chamber 10. At the same time, the arrangement of the baffles 130 can also reduce the turbulence phenomenon of the gas in the test chamber 10, make the gas flow more smoothly, provide a more stable environment for the test process, and provide more ideal test conditions for studying the performance of the carbon-based catalyst.
[0055] Furthermore, an embodiment of the present invention also provides a test method. This test method uses the carbon-based catalyst performance test device provided in any one of the above embodiments to carry out the performance test of the carbon-based catalyst. Specifically, this test method at least includes the following steps:
[0056] S01: Loading: Close the bottom opening of the reaction tube 20 through the movable plate 310 and load the carbon-based catalyst with the required height for the test from the top of the reaction tube 20.
[0057] The top-mounted feeding method has better operability and can ensure the uniform distribution of the catalyst in the reaction tube 20, providing a good basis for subsequent adsorption and regeneration tests.
[0058] S02: Environmental simulation of the test chamber 10: Hot air with the same temperature as the test flue gas is introduced through the inlet 110 of the test chamber 10 and circulated through the outlet 120.
[0059] It should be noted that a temperature sensor can be set at a position near the outlet 120 in the test chamber 10 to display the temperature of the outlet 120 in the test chamber 10. The test chamber 10 simulates the working environment of the carbon-based catalyst in actual application, and the temperature and gas composition in the test chamber 10 during the test are ensured to be consistent with the actual working conditions through the temperature display of the outlet 120, thereby improving the reliability of the test results.
[0060] S03: Adsorption test: Close the regeneration gas pipeline and open the flue gas pipeline. The outer periphery of the reaction tube 20 maintains the test temperature, and the inside reacts with the flue gas through the carbon-based catalyst. In this step, harmful substances in the flue gas are adsorbed by the carbon-based catalyst, thereby realizing the test of the adsorption performance of the catalyst.
[0061] It should be noted that step S03 can be carried out separately to test the adsorption effect of the carbon-based catalyst on the flue gas.
[0062] S04: Regeneration test: Close the flue gas pipeline and open the regeneration gas pipeline. Nitrogen is introduced, and the ventilation time of a single reaction tube 20 is greater than the ratio of its volume to the nitrogen flow rate. Hot air with a preset regeneration temperature is introduced through the inlet 110 of the test chamber 10 and circulated through the outlet 120. After the temperature of the test chamber 10 reaches the set temperature, the reaction tube 20 maintains the first preset duration to complete the regeneration experiment.
[0063] It should be noted that during the process of introducing nitrogen, the ventilation time of a single reaction tube 20 being greater than the ratio of its volume to the nitrogen flow rate is to discharge the flue gas or air in the reaction tube 20, so that the carbon-based catalyst in the reaction tube 20 can be completely under the influence of nitrogen; and introducing hot air with a preset regeneration temperature again through the inlet 110 of the test chamber 10 and circulating through the outlet 120 is because the temperature of the carbon-based catalyst regeneration condition is different from the temperature of the adsorption condition, so the temperature of the test chamber 10 needs to be adjusted again.
[0064] On the basis of the above embodiments, steps S03 and S04 can be alternately repeated multiple times until the required number of adsorption-regeneration cycles of the carbon-based catalyst is met. Through multiple repeated adsorption and regeneration tests, the performance changes of the carbon-based catalyst during multiple cycles can be comprehensively evaluated, providing a basis for the study of the service life and performance stability of the catalyst.
[0065] S05: Catalyst Cooling: Keep one of the flue gas pipeline and the regeneration gas pipeline open, and introduce heat exchange air into the reaction tube 20. The inlet temperature of the heat exchange air is the same as the catalyst cooling temperature, and stop the ventilation after the temperature at the outlet position of the reaction tube 20 remains stable.
[0066] The pipeline for the heat exchange air can borrow one of the flue gas pipeline and the regeneration gas pipeline, which further improves the integration degree of the test device; and cooling the catalyst to a safe temperature facilitates the subsequent unloading operation and the research on the removal of the catalyst.
[0067] S06: Unloading: Move the movable plate 310 to open the reaction tube 20, and the catalyst falls off from the reaction tube 20 under the action of gravity and is collected.
[0068] The above unloading method is simple and efficient. The carbon-based catalyst can be smoothly unloaded under the action of gravity, which is convenient for further analysis of the catalyst after the test.
[0069] Terms such as "first", "second", "left side" and "right side" in the description, claims and above-mentioned drawings of this application are used to distinguish different objects, rather than to describe a specific order. In addition, the terms "comprising" and "having" and any variations thereof are intended to cover non-exclusive inclusion. For example, a process, method, system, product or device that includes a series of steps or units is not limited to the listed steps or units, but may include steps or units not listed.
[0070] The above description of the disclosed embodiments enables those skilled in the art to implement or use this application. Various modifications to these embodiments will be obvious to those skilled in the art, and the general principles defined herein can be implemented in other embodiments without departing from the spirit or scope of this application. Therefore, this application will not be limited to these embodiments shown herein, but will be accorded the widest scope consistent with the principles and novel features disclosed herein.
Claims
1. A performance test device for carbon-based catalysts, characterized in that, Comprising: A test chamber, which is an enclosed chamber and is provided with an air inlet and an air outlet at intervals. A plurality of reaction tubes are arranged inside the test chamber at intervals. The reaction tubes are hollow cavity structures and both ends thereof open out of the test chamber. The reaction tubes are used for accommodating carbon-based catalysts; A flue gas pipeline and a regeneration gas pipeline. The flue gas pipeline communicates with both ends of the reaction tube, and the regeneration gas pipeline communicates with both ends of the reaction tube. Moreover, the flue gas pipeline and the regeneration gas pipeline are independently adjusted; A discharging section, which is arranged at the bottom of the test chamber. The discharging section includes a movable plate, and the movable plate is arranged at the bottom of the reaction tube and opens and closes the opening of the carbon-based catalyst at the bottom of the reaction tube through a sliding action.
2. The carbon-based catalyst performance test device according to claim 1, characterized in that, A pipe cap is hoisted and arranged at the bottom of the reaction tube. The outer diameter of the top of the pipe cap is larger than the outer diameter of the reaction tube, and is arranged at an interval with the bottom opening of the reaction tube. Moreover, the pipe cap contracts towards its bottom; A communication hole is formed in the movable plate and corresponds to the pipe cap one by one. When the movable plate moves to the communication position, the bottom opening of the pipe cap is aligned and communicated with the communication hole. When the movable plate leaves the communication position, the bottom opening of the pipe cap is closed.
3. The carbon-based catalyst performance test device according to claim 2, characterized in that, The bottom of the pipe cap and the movable plate are arranged at a distance of 2 mm - 5 mm in the vertical direction.
4. The carbon-based catalyst performance test device according to claim 1, characterized in that, A first guiding section is arranged at the top of the test chamber. The large end of the first guiding section fits the top of the test chamber to cover the top openings of all the reaction tubes. The small end of the first guiding section leads out at least two branches and is respectively provided with a switching valve.
5. The carbon-based catalyst performance test device according to claim 4, characterized in that, A second guiding section is arranged at the bottom of the discharging section. The large end of the second guiding section contacts the bottom of the discharging section. The small end of the second guiding section leads out at least three branches and is respectively provided with a switching valve.
6. The carbon-based catalyst performance test device according to claim 5, wherein The slope angle of the inclined plane of the first guiding section is not less than 30°; the slope angle of the inclined plane of the second guiding section is not less than 45°.
7. The carbon-based catalyst performance test device according to claim 1, wherein A plurality of the reaction tubes are arranged in parallel, and the reaction tubes are arranged at an interval with the inner wall of the test chamber.
8. The performance test device for the carbon-based catalyst according to claim 1, wherein The flow paths of the flue gas pipeline and the regeneration gas pipeline in the reaction tube are opposite.
9. The carbon-based catalyst performance test device according to claim 1, characterized in that, The inner wall of the test chamber is alternately provided with baffle plates in the vertical direction. The air inlet and the air outlet are arranged on both sides of the baffle plates in the vertical direction.
10. A test method, characterized in that, When performing a performance test on a carbon-based catalyst using the carbon-based catalyst performance test device according to any one of claims 1 - 9, the test method at least includes the following steps: Loading: closing the bottom opening of the reaction tube through the movable plate, and loading carbon-based catalysts with the required height for the test from the top of the reaction tube; Simulating the test chamber environment: introducing hot air with the same temperature as the test flue gas from the air inlet of the test chamber, and forming a cycle through the air outlet; Adsorption test: closing the regeneration gas pipeline and opening the flue gas pipeline, keeping the periphery of the reaction tube at the test temperature, and allowing the flue gas to pass through the inside to react with the carbon-based catalyst for adsorption; Regeneration test: Close the flue gas line and open the regeneration gas line, introduce nitrogen, and the ventilation time of a single reaction tube is greater than the ratio of its volume to the nitrogen flow rate. Hot air at a preset regeneration temperature is introduced from the air inlet of the test chamber and circulated through the air outlet. After the test chamber temperature reaches the set temperature, the reaction tube is kept at a first preset time to complete the regeneration test; Repeat the adsorption test steps and the regeneration test steps until the number of carbon-based catalyst adsorption-regeneration times required by the test is met; Catalyst cooling: keep one of the flue gas pipeline and the regeneration gas pipeline open, and introduce heat exchange air into the reaction tube. The inlet temperature of the heat exchange air is the same as the catalyst cooling temperature, and stop ventilation after the temperature at the outlet of the reaction tube remains stable. To unload, move the movable plate to open the reaction tube, and the catalyst will fall out of the reaction tube under the action of gravity and be collected.