A moving bed continuous regeneration on-line agent replacement device, operation method and application
By designing a moving bed continuous regeneration online catalyst replacement device, online catalyst replacement was achieved, solving the problem of shutdown and maintenance during catalyst replacement, ensuring stable operation and production continuity of the unit, and reducing resource waste and economic losses.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- SINOPEC GUANGZHOU ENG CO LTD
- Filing Date
- 2026-03-11
- Publication Date
- 2026-06-09
AI Technical Summary
Moving bed continuous regeneration units require shutdown for maintenance during catalyst replacement, resulting in unnecessary maintenance costs and economic losses from production stoppages.
Design a moving bed continuous regeneration online catalyst exchange device, including a regenerator, a lower hopper of the regenerator, a catalyst addition tank, a catalyst cooling tank, and a waste catalyst collection tank. The online catalyst exchange process is controlled by specific pipelines and valves to ensure that the catalyst continuously circulates between reaction and regeneration.
This enabled online catalyst replacement, avoiding downtime for maintenance, ensuring stable operation and production continuity of the unit, and reducing resource waste and economic losses.
Smart Images
Figure CN122164313A_ABST
Abstract
Description
Technical Field
[0001] This invention belongs to the field of petrochemical or natural gas chemical industry, and relates to a moving bed device, specifically, a moving bed continuous regeneration online exchange device, its operation method, and its application. Background Technology
[0002] Moving bed continuous regeneration technology can further improve the reaction environment of the catalyst, ensuring that the reaction operates under conditions close to those of fresh catalyst throughout the catalyst's lifespan. The reaction temperature remains essentially constant, resulting in more optimized product distribution, more stable yields, and higher plant operating rates compared to fixed bed processes. In this system, four reactors are arranged in pairs. After the reaction, the carbon-containing spent catalyst enters the regenerator from the fourth reactor. The regenerated catalyst, having regained its activity, then sequentially enters the first, second, third, and fourth reactors, repeating the cycle to achieve continuous catalyst regeneration. Therefore, it is widely used in continuous reforming units, propane dehydrogenation units, and light hydrocarbon aromatization units.
[0003] The most significant feature of the moving bed continuous regeneration process technology is its "continuous" nature: the catalyst can continuously circulate between reaction and regeneration throughout its lifespan, ensuring long-term stable operation of the unit. When the catalyst reaches the end of its lifespan or needs replacement due to poor economic returns, the traditional method is to replace it during unit shutdown for maintenance. Replacing the catalyst during a shutdown when no maintenance is required would result in unnecessary maintenance costs and economic losses due to production stoppage.
[0004] CN 01115290.7 discloses a continuous reforming unit with four reaction zones for petroleum processing. Each pair of the four reaction zones is arranged in a top-down, overlapping manner to form two reaction towers. The two reaction towers and the regeneration system are arranged side-by-side. Compared to existing continuous reforming units with four reaction zones, this design reduces the elevation difference between the reaction frame and the regeneration frame, making the unit layout more convenient. A typical arrangement of a moving bed continuous regeneration unit is provided, but it lacks online unloading functionality. Summary of the Invention
[0005] To address the issue of unnecessary maintenance costs and economic losses caused by catalyst replacement in moving bed continuous regeneration units, which require shutdown for repairs, this invention provides an online catalyst replacement device, its operation method, and its application for continuous moving bed regeneration.
[0006] The moving bed continuous regeneration online catalyst replacement device provided by the present invention includes a regenerator, a lower hopper of the regenerator, a catalyst addition tank, a catalyst addition control tank, a catalyst cooling tank, and a waste catalyst collection tank; the regenerator is located above the lower hopper of the regenerator, and the bottom of the regenerator and the top of the lower hopper of the regenerator are connected by a regeneration pipeline, and a regeneration control valve is provided on the regeneration pipeline; The catalyst addition tank is located above the catalyst addition control tank, which is located above the lower hopper of the regenerator. The bottom of the catalyst addition tank is connected to the top of the catalyst addition control tank via an addition pipeline. The addition pipeline is equipped with a catalyst addition tank control valve. The bottom of the catalyst addition control tank is connected to the top of the lower hopper of the regenerator via an addition control pipeline. The addition control pipeline is equipped with a catalyst addition control tank control valve. A pressure stabilizing pipeline is installed at the top of the lower hopper of the regenerator, and a pressurizing pipeline is installed at the top of the catalyst addition control tank. Both the pressure stabilizing pipeline and the pressurizing pipeline are connected to the gas transmission pipeline. A pressure stabilizing control valve is installed on the pressure stabilizing pipeline, and a pressurizing control valve is installed on the pressurizing pipeline. A venting pipeline is connected to the pressurizing pipeline. The connection between the pressurizing pipeline and the venting pipeline is located on the outlet side of the pressurizing control valve. A venting control valve for the catalyst addition control tank is installed on the venting pipeline. The catalyst cooling tank is located below the regenerator. The top of the catalyst cooling tank is connected to the regeneration pipeline via a discharge pipeline. The connection between the discharge pipeline and the regeneration pipeline is located on the inlet side of the regeneration control valve. A discharge control valve is installed on the discharge pipeline. A bottom discharge control valve is installed on the bottom pipeline of the catalyst cooling tank. A top vent control valve is installed on the top pipeline of the catalyst cooling tank.
[0007] The catalyst cooling tank is a jacketed device, and the cooling medium depends on the actual situation of the device. The cooling medium includes, but is not limited to, gas and liquid.
[0008] The surface of the unloading pipeline is equipped with fins, which greatly increases the heat exchange area in contact with air and effectively reduces the consumption of cooling medium.
[0009] The bottom discharge control valve of the catalyst cooling tank is connected to the waste catalyst collection tank via a metal hose. This allows for the recovery of precious metals and prevents resource waste.
[0010] The pressure stabilizing pipeline can maintain gas flow between the regenerator and the lower hopper of the regenerator, preventing the device from shutting down due to excessively low pressure difference between the lower hopper and the bottom of the regenerator, thus affecting the operation of the device.
[0011] The regenerator operates at a pressure of 0.15–0.60 Pa (gauge pressure) and a coking temperature of 400–650 °C.
[0012] As an improvement, the bottom of the regenerator's lower hopper is connected to either the catalyst level control hopper or the catalyst reduction chamber via a pipeline. Both the catalyst level control hopper and the catalyst reduction chamber can be used to control the catalyst level; the catalyst reduction chamber is also used when the catalyst needs to be reduced.
[0013] As a further improvement, the bottom of the regenerator's lower hopper is connected to a regenerator elevator via a pipeline. The regenerator elevator is then connected to the catalyst level control hopper or the catalyst reduction chamber via a pipeline. The regenerator elevator is mainly used in applications where the catalyst needs to be lifted.
[0014] As an improvement, a lock hopper is installed above the regenerator, and a separation hopper is installed above the lock hopper; the two are connected by pipelines. The separation hopper mainly uses purging gas to blow away catalyst dust, while the lock hopper is mainly used to control the catalyst circulation rate.
[0015] The normal regeneration cycle of the catalyst involved in this invention is as follows: the carbon-containing catalyst (hereinafter referred to as the spent catalyst) from the reaction section enters the regenerator, and after passing through the regenerator from top to bottom through steps such as coking, reheating, chlorination, and roasting, it exits the regenerator and returns to the reaction section via the hopper at the bottom of the regenerator, completing one regeneration cycle. The catalyst can continuously circulate between the reaction section and the regeneration section during its life cycle, thereby ensuring that the device can operate stably for a long period of time.
[0016] When a catalyst reaches the end of its lifespan or needs to be replaced due to poor economic benefits, the device of this invention can achieve online catalyst replacement, that is, simultaneous online loading and unloading of catalyst.
[0017] The device of the present invention involves a cycle of three states during the agent replacement process: a stopped state, a ready state, and a loading / unloading state.
[0018] Stopped state: This means that all eight control valves, including the regeneration control valve, catalyst addition tank control valve, catalyst addition control tank control valve, pressurization control valve, catalyst addition control tank venting control valve, unloading control valve, catalyst cooling tank top venting control valve, and catalyst cooling tank bottom discharge control valve, are simultaneously closed.
[0019] Preparation status: Open the vent control valve of the catalyst addition control tank to make the pressure of the catalyst addition control tank consistent with that of the catalyst addition tank, then close the vent control valve of the catalyst addition control tank. Then open the control valve of the catalyst addition tank to allow the catalyst to flow from the catalyst addition tank into the catalyst addition control tank, and then close the control valve of the catalyst addition tank. Next, open the pressurization control valve to raise the pressure of the catalyst addition control tank to near the pressure of the lower hopper of the regenerator, and then close the pressurization control valve. Open the top vent control valve of the catalyst cooling tank to reduce the pressure of the catalyst cooling tank to atmospheric pressure, and then close the top vent control valve of the catalyst cooling tank. Open the bottom discharge control valve of the catalyst cooling tank to discharge the waste catalyst, and then close the bottom discharge control valve of the catalyst cooling tank.
[0020] Loading and unloading status: Simultaneously open the catalyst addition control tank control valve and the unloading control valve to allow fresh catalyst to flow from the catalyst addition control tank into the lower hopper of the regenerator, and then close the catalyst addition control tank control valve; at the same time, the spent catalyst at the end of its service life flows from the regenerator into the catalyst cooling tank, and then close the unloading control valve.
[0021] Once the loading and unloading process is complete and fresh catalyst enters the subsequent reaction section through the lower hopper of the regenerator, the regeneration control valve is opened, thus completing the online catalyst replacement. During the online catalyst replacement process, the pressure stabilizing control valve remains open. When the catalyst reaches the end of its service life or needs replacement due to poor economic efficiency, the above three-state cycle is repeated.
[0022] The present invention also provides an operation method for a moving bed continuous regeneration online refrigerant exchange device, comprising the following steps: 1) When changing catalysts online, first close the control valve of the catalyst addition tank, add fresh catalyst to the catalyst addition tank, and keep the pressure stabilizing control valve open at all times. 2) Close the regeneration control valve, and at the same time, keep the following six control valves closed: catalyst addition control tank control valve, pressurization control valve, catalyst addition control tank venting control valve, unloading control valve, catalyst cooling tank top venting control valve, and catalyst cooling tank bottom discharge control valve. 3) Open the vent control valve of the catalyst addition control tank to make the pressure of the catalyst addition control tank consistent with that of the catalyst addition tank. Then close the vent control valve of the catalyst addition control tank. Next, open the control valve of the catalyst addition tank to allow the catalyst to flow from the catalyst addition tank into the catalyst addition control tank. Then close the control valve of the catalyst addition tank. Then open the pressurization control valve to raise the pressure of the catalyst addition control tank to near the pressure of the lower hopper of the regenerator. Then close the pressurization control valve. 4) Open the vent control valve at the top of the catalyst cooling tank to reduce the pressure in the catalyst cooling tank to atmospheric pressure, then close the vent control valve at the top of the catalyst cooling tank. Open the discharge control valve at the bottom of the catalyst cooling tank to discharge the waste catalyst, then close the discharge control valve at the bottom of the catalyst cooling tank. 5) Simultaneously open the catalyst addition control tank control valve and the discharge control valve to allow fresh catalyst to flow from the catalyst addition control tank into the lower hopper of the regenerator, and then close the catalyst addition control tank control valve; at the same time, the spent catalyst at the end of its lifespan flows from the regenerator into the catalyst cooling tank, and then close the discharge control valve. 6) Repeat the above steps until the catalyst has been completely replaced with fresh catalyst at the end of its life. Then, shut down the online catalyst replacement device (even if the online catalyst replacement device is stopped), open the regeneration control valve, and restore the normal catalyst circulation process. At this point, the online catalyst replacement is complete.
[0023] During online catalyst replacement, the catalyst regeneration cycle rate is set at 60% to 80% of the design load to ensure stable operation of the replacement process.
[0024] The moving bed continuous regeneration online exchanger device of the present invention can be applied to continuous reforming, propane dehydrogenation and light hydrocarbon aromatization devices.
[0025] The present invention has the following beneficial effects: 1) This invention enables online catalyst replacement, which is not limited by maintenance time and can be completed without downtime.
[0026] 2) In this invention, online catalyst replacement does not affect the normal production of the unit, and the catalyst regeneration section also operates normally. Online catalyst loading and unloading are carried out simultaneously. The loading rate can be controlled by the catalyst replacement control system and can be adjusted in a timely manner according to the material level in the reduction chamber. The catalyst unloading control valve controls the unloading rate and can be adjusted in a timely manner according to the material level in the regenerator buffer zone. The catalyst is replaced stably, ensuring the stable operation of the unit.
[0027] 3) During online catalyst replacement, the catalyst regeneration and circulation operate normally, and catalyst charring is not affected. The charred catalyst is discharged to the catalyst cooling tank through the catalyst discharge pipeline. After cooling, it falls into the collection bucket through a sealed metal hose. The catalyst replacement effect is checked by the color of the charred catalyst in the collection bucket and the amount of catalyst loaded. This ensures the quality of catalyst replacement and avoids wasting fresh catalyst. Finally, it is sealed and sent to the catalyst manufacturer for precious metal recovery, which does not cause resource waste. At the same time, the catalyst discharge line is equipped with fins, which greatly increases the heat exchange area in contact with air and effectively reduces the consumption of cooling medium.
[0028] 4) In this invention, a regeneration control valve and a pressure stabilizing pipeline are provided at the top of the lower hopper of the regenerator. During online catalyst replacement, the regeneration control valve is closed, and the catalyst can enter the catalyst cooling tank through the catalyst discharge pipeline. The pressure stabilizing pipeline can maintain a stable pressure difference between the regenerator and the lower hopper of the regenerator, avoiding excessively low pressure difference between the lower hopper of the regenerator and the bottom of the regenerator, which could lead to a thermal shutdown of the unit and affect the operation of the unit and catalyst lifting. Attached Figure Description
[0029] Figure 1 This is a schematic diagram of one structure of the present invention.
[0030] In the diagram: 1-Catalyst addition tank, 2-Catalyst addition control tank, 3-Catalyst cooling tank, 4-Separation hopper, 5-Lock hopper, 6-Regenerator, 7-Lower hopper of regenerator, 8-Regenerator elevator, 9-Reduction chamber, 10-Collection bucket, 11-Discharge pipeline, 12-Top pipeline of catalyst cooling tank, 13-Bottom pipeline of catalyst cooling tank, 14-Addition control pipeline, 15-Regeneration pipeline, 16-Addition pipeline, 17-Vent pipeline, 18-Pressure charging pipeline, 19-Gas transmission pipeline, 20-Pressure stabilizing pipeline.
[0031] V1 - Regeneration control valve, V2 - Pressure stabilizing control valve, V3 - Catalyst addition tank control valve, V4 - Catalyst addition control tank venting control valve, V5 - Pressurization control valve, V6 - Catalyst cooling tank bottom discharge control valve, V7 - Catalyst cooling tank top venting control valve, V8 - Discharge control valve, V9 - Catalyst addition control tank control valve.
[0032] A - Fresh catalyst, B - Catalyst awaiting development, C - Nitrogen. Detailed Implementation
[0033] The invention will now be further described with reference to the accompanying drawings.
[0034] like Figure 1 As shown, the present invention provides a moving bed continuous regeneration online catalyst replacement device, including a catalyst addition tank 1, a catalyst addition control tank 2, a catalyst cooling tank 3, a separation hopper 4, a locking hopper 5, a regenerator 6, a regenerator lower hopper 7, a regenerator elevator 8, a reduction chamber 9, and a collection tank 10.
[0035] Separating hopper 4, locking hopper 5, regenerator 6, lower hopper of regenerator 7 and regenerator elevator 8 are arranged in sequence from top to bottom. The regenerator elevator 8 is connected to the reduction chamber 9 located above and to the side of the lower hopper of regenerator 7 via a pipeline.
[0036] The bottom of the regenerator 6 and the top of the lower hopper 7 of the regenerator are connected by a regeneration pipeline 15, on which a regeneration control valve V1 is provided.
[0037] Catalyst addition tank 1 is located above catalyst addition control tank 2, which is located above the lower hopper 7 of the regenerator. The bottom of catalyst addition tank 1 is connected to the top of catalyst addition control tank 2 via addition pipeline 16, which is equipped with catalyst addition tank control valve V3. The bottom of catalyst addition control tank 2 is connected to the top of the lower hopper 7 of the regenerator via addition control pipeline 14, which is equipped with catalyst addition control tank control valve V9.
[0038] The top of the regenerator's lower hopper 7 is equipped with a pressure stabilizing pipeline 20, and the top of the catalyst addition control tank 2 is equipped with a pressurizing pipeline 18. Both the pressure stabilizing pipeline 20 and the pressurizing pipeline 18 are connected to the gas transmission pipeline 19. The pressure stabilizing pipeline 20 is equipped with a pressure stabilizing control valve V2, and the pressurizing pipeline 18 is equipped with a pressurizing control valve V5. The pressurizing pipeline 18 is connected to a venting pipeline 17, and the connection between the pressurizing pipeline 18 and the venting pipeline 17 is located on the outlet side of the pressurizing control valve V5. The venting pipeline 17 is equipped with a catalyst addition control tank venting control valve V4.
[0039] The catalyst cooling tank 3 is located below the regenerator 6. The top of the catalyst cooling tank 3 is connected to the regeneration pipeline 15 via the discharge pipeline 11. The connection between the discharge pipeline 11 and the regeneration pipeline 15 is located on the inlet side of the regeneration control valve V1. The discharge pipeline 11 is equipped with a discharge control valve V8. The bottom pipeline 13 of the catalyst cooling tank is equipped with a bottom discharge control valve V6. The top pipeline 12 of the catalyst cooling tank is equipped with a top vent control valve V7.
[0040] Figure 1 The normal regeneration cycle of the catalyst involved in the moving bed continuous regeneration online catalyst exchange device of the present invention is as follows: the catalyst B to be generated from the reaction section first enters the separation hopper 4 to blow away the catalyst dust, then enters the closed hopper 5, and then enters the regenerator 6. In the regenerator 6, it goes through the steps of coking, reheating, chlorination, and roasting from top to bottom, and then exits the regenerator 6 and enters the lower hopper 7 of the regenerator. It enters the regenerator elevator 8 through the lower hopper 7, and is lifted by the regenerator elevator 8 to the reduction chamber 9 and returned to the reaction section, completing one regeneration cycle.
[0041] Figure 1 The operation method of the moving bed continuous regeneration online exchanger device of the present invention, as shown, includes the following steps: 1) When changing catalysts online, first close the control valve V3 of the catalyst addition tank, add fresh catalyst A into the catalyst addition tank 1, and keep the pressure stabilizing control valve V2 always open; 2) Close the regeneration control valve V1, and at the same time, keep the following six control valves closed: catalyst addition control tank control valve V9, pressurization control valve V5, catalyst addition control tank venting control valve V4, unloading control valve V8, catalyst cooling tank top venting control valve V7, and catalyst cooling tank bottom discharge control valve V6. 3) Open the vent control valve V4 of the catalyst addition control tank to make the pressure of catalyst addition control tank 2 the same as that of catalyst addition tank 1. Then close the vent control valve V4. Next, open the control valve V3 of the catalyst addition tank to allow fresh catalyst A to flow from catalyst addition tank 1 into catalyst addition control tank 2. Then close the control valve V3. Then open the pressurization control valve V5 to allow nitrogen C to enter catalyst addition control tank 2 through gas delivery line 19 and pressurization line 18. After raising the pressure of catalyst addition control tank 2 to near the pressure of the lower hopper 7 of the regenerator, close the pressurization control valve V5. 4) Open the top vent control valve V7 of the catalyst cooling tank to reduce the pressure of the catalyst cooling tank 3 to atmospheric pressure, then close the top vent control valve V7 of the catalyst cooling tank. Open the bottom discharge control valve V6 of the catalyst cooling tank to discharge the waste catalyst, then close the bottom discharge control valve V6 of the catalyst cooling tank. 5) Simultaneously open the catalyst addition control tank control valve V9 and the discharge control valve V8 to allow fresh catalyst to flow from the catalyst addition control tank 2 into the lower hopper 7 of the regenerator, and then close the catalyst addition control tank control valve V9; at the same time, the waste catalyst at the end of its service life flows into the catalyst cooling tank 3 from the self-regenerator 6, and then close the discharge control valve V8. 6) Repeat the above steps until the catalyst at the end of its life has been completely replaced with fresh catalyst. Then, shut down the online catalyst replacement device, open the regeneration control valve V1, and restore the normal catalyst circulation process. The online catalyst replacement is now complete.
Claims
1. A moving bed continuous regeneration online refrigerant exchange device, characterized in that: It includes a regenerator, a lower hopper of the regenerator, a catalyst addition tank, a catalyst addition control tank, a catalyst cooling tank, and a waste catalyst collection tank; The regenerator is located above the lower hopper of the regenerator. The bottom of the regenerator and the top of the lower hopper of the regenerator are connected by a regeneration pipeline, and a regeneration control valve is installed on the regeneration pipeline. The catalyst addition tank is located above the catalyst addition control tank, which is located above the lower hopper of the regenerator. The bottom of the catalyst addition tank is connected to the top of the catalyst addition control tank via an addition pipeline. The addition pipeline is equipped with a catalyst addition tank control valve. The bottom of the catalyst addition control tank is connected to the top of the lower hopper of the regenerator via an addition control pipeline. The addition control pipeline is equipped with a catalyst addition control tank control valve. A pressure stabilizing pipeline is installed at the top of the lower hopper of the regenerator, and a pressurizing pipeline is installed at the top of the catalyst addition control tank. Both the pressure stabilizing pipeline and the pressurizing pipeline are connected to the gas transmission pipeline. A pressure stabilizing control valve is installed on the pressure stabilizing pipeline, and a pressurizing control valve is installed on the pressurizing pipeline. A venting pipeline is connected to the pressurizing pipeline. The connection between the pressurizing pipeline and the venting pipeline is located on the outlet side of the pressurizing control valve. A venting control valve for the catalyst addition control tank is installed on the venting pipeline. The catalyst cooling tank is located below the regenerator. The top of the catalyst cooling tank is connected to the regeneration pipeline via a discharge pipeline. The connection between the discharge pipeline and the regeneration pipeline is located on the inlet side of the regeneration control valve. A discharge control valve is installed on the discharge pipeline. A bottom discharge control valve is installed on the bottom pipeline of the catalyst cooling tank. A top vent control valve is installed on the top pipeline of the catalyst cooling tank. The catalyst cooling tank is a jacketed device, the surface of the unloading pipeline is provided with fins, and the bottom discharge control valve of the catalyst cooling tank is connected to the waste catalyst collection tank through a metal hose.
2. The moving bed continuous regeneration online exchanger device according to claim 1, characterized in that: The bottom of the regenerator's lower hopper is connected to the catalyst level control hopper or the catalyst reduction chamber via a pipeline.
3. The moving bed continuous regeneration online exchanger device according to claim 2, characterized in that: The bottom of the lower hopper of the regenerator is connected to the regenerator elevator via a pipeline, and the regenerator elevator is connected to the catalyst level control hopper or the catalyst reduction chamber via a pipeline.
4. The moving bed continuous regeneration online exchanger device according to claim 1, characterized in that: A locking hopper is located above the regenerator, and a separating hopper is located above the locking hopper; the two are connected by pipelines.
5. A method for operating the moving bed continuous regeneration online exchanger device according to any one of claims 1 to 4, characterized in that... Includes the following steps: 1) When changing catalysts online, first close the control valve of the catalyst addition tank, add fresh catalyst to the catalyst addition tank, and keep the pressure stabilizing control valve open at all times. 2) Close the regeneration control valve, and at the same time, keep the following six control valves closed: catalyst addition control tank control valve, pressurization control valve, catalyst addition control tank venting control valve, unloading control valve, catalyst cooling tank top venting control valve, and catalyst cooling tank bottom discharge control valve. 3) Open the vent control valve of the catalyst addition control tank to make the pressure of the catalyst addition control tank consistent with that of the catalyst addition tank. Then close the vent control valve of the catalyst addition control tank. Next, open the control valve of the catalyst addition tank to allow the catalyst to flow from the catalyst addition tank into the catalyst addition control tank. Then close the control valve of the catalyst addition tank. Then open the pressurization control valve to raise the pressure of the catalyst addition control tank to near the pressure of the lower hopper of the regenerator. Then close the pressurization control valve. 4) Open the vent control valve at the top of the catalyst cooling tank to reduce the pressure in the catalyst cooling tank to atmospheric pressure, then close the vent control valve at the top of the catalyst cooling tank. Open the discharge control valve at the bottom of the catalyst cooling tank to discharge the waste catalyst, then close the discharge control valve at the bottom of the catalyst cooling tank. 5) Simultaneously open the catalyst addition control tank control valve and the discharge control valve to allow fresh catalyst to flow from the catalyst addition control tank into the lower hopper of the regenerator, and then close the catalyst addition control tank control valve; at the same time, the spent catalyst at the end of its lifespan flows from the regenerator into the catalyst cooling tank, and then close the discharge control valve. 6) Repeat the above steps until the catalyst has been completely replaced with fresh catalyst at the end of its life. Then, shut down the online catalyst replacement device, open the regeneration control valve, and restore the normal catalyst circulation process. At this point, the online catalyst replacement is complete.
6. The operation method of the moving bed continuous regeneration online exchanger device according to claim 5, characterized in that: During online catalyst replacement, the catalyst regeneration cycle rate is set at 60% to 80% of the design load.
7. An application of the moving bed continuous regeneration online exchanger device according to any one of claims 1 to 4, characterized in that: The moving bed continuous regeneration online exchanger is used in continuous reforming, propane dehydrogenation, or light hydrocarbon aromatization units.