Regenerator of catalyst

Abstract

The present invention relates to the technical field of catalysis, and discloses a catalyst regenerator, which comprises: a regenerator shell provided with a feed inlet; the lifting cylinder is fixed on one side wall of the regenerator shell, and the top end of the lifting cylinder is connected with a cover plate for sealing the feeding hole through a supporting block; the filter is arranged at the upper end of the inner side of the regenerator shell and is used for cleaning and filtering a catalyst; the three-way valve is arranged at the lower end of the filter, and one end of the three-way valve is connected with a blow-off pipe; a drying chamber; by arranging the filter, the drying chamber, the blow-off pipe, the nitrogen input pipe, the lifting cylinder and the three-way valve, macromolecular pollutants on the surface of a catalyst can be removed firstly through cleaning, then the catalyst is subjected to high-temperature calcination through nitrogen protection, the integrated treatment efficiency is improved, dirt removal on the surface of the catalyst can be greatly improved, and the service life of the catalyst is prolonged. And nitrogen in the device can protect the catalyst in a high-temperature environment, so that the activity of the catalyst is well recovered.

Description

Technical Field

[0001] The present invention relates to the field of catalysis technology, in particular to a catalyst regenerator. Background Art

[0002] A catalyst is a substance that can change the speed of a chemical reaction without changing its own mass and chemical properties before and after the reaction. A catalyst regenerator is a crucial piece of equipment in industrial catalysis. Its core function is to restore the performance of catalysts that have lost activity due to carbon deposition, poisoning, or physical deactivation, allowing them to be recycled and reducing costs. For example, in publication number CN116393128B, entitled "A Graphene-Loaded Copper Nanocluster Catalyst and Its Preparation Process," the catalyst needs to be regenerated after use.

[0003] When regenerating existing catalysts, pollutants on the catalyst surface are removed only by high-temperature calcination. However, when large molecular pollutants exist on the catalyst surface, incomplete carbonization occurs at high temperatures, and a viscous tar layer is formed to wrap around the active sites of the catalyst, affecting the efficiency of pollutant removal and resulting in poor regeneration. Some catalysts are first cleaned with a cleaning fluid and then calcined, but the catalyst needs to be transferred and transported between the cleaner and the calcination regenerator, which is more troublesome and time-consuming, and the use effect is not good. For this reason, we propose a catalyst regenerator. Summary of the Invention

[0004] The purpose of the present invention is to provide a catalyst regenerator to solve the problem mentioned in the above background technology that the existing catalyst regenerator only performs high-temperature calcination, the catalyst regeneration effect is poor, and a few regenerations are performed first by cleaning, but the catalyst needs to be transferred and transported between the cleaning equipment and the high-temperature calcination regeneration equipment, which is troublesome and time-consuming.

[0005] To achieve the above object, the present invention provides the following technical solution: a catalyst regenerator, comprising:

[0006] A regenerator shell, wherein a feed port is provided on the regenerator shell;

[0007] A lifting cylinder is fixed to a side wall of the regenerator housing, and a cover plate for closing the feed port is connected to the top of the lifting cylinder through a support block;

[0008] A filter is provided at the upper end of the inner side of the regenerator shell to clean and filter the catalyst;

[0009] A three-way valve is provided at the lower end of the filter, and one end of the three-way valve is connected to a sewage pipe;

[0010] A drying chamber is provided at the other end of the three-way valve, and a lower end of the drying chamber is connected to a calcining pipeline via a control valve;

[0011] A nitrogen inlet pipe is provided on a side wall of the drying chamber to introduce inert gas into the inner side of the drying chamber.

[0012] Preferably, the filter includes a filter housing, a second discharge outlet, a filter screen, a first discharge outlet and a sealing column. The filter screen is fixed to the middle part of the inner side of the filter housing, and the first discharge outlet is opened on the inner side of the filter screen. The sealing column is fixed to the lower surface of the cover plate, and the lower end of the sealing column is inserted into the inner side of the first discharge outlet. The bottom end of the filter housing has a second discharge outlet corresponding to the three-way valve.

[0013] Preferably, the filter screen is conical.

[0014] Preferably, the lower end of the sealing column is chamfered.

[0015] Preferably, a spray pipe is fixed to the top inner side of the filter housing, a spray head is provided on the lower surface of the spray pipe, and one end of the spray pipe penetrates the outer surface of the regenerator housing to form a liquid inlet.

[0016] Preferably, the spray pipe is vortex-shaped.

[0017] Preferably, the nitrogen inlet pipe is provided at two locations, and the other one is connected to the inside of the calcining pipe.

[0018] Preferably, the calcination pipe is spiral-shaped, and the lower end of the calcination pipe passes through the lower surface of the regenerator shell and is formed with a discharge port.

[0019] Preferably, supporting legs are fixed to the lower surface of the regenerator housing.

[0020] Preferably, the drying chamber is provided with an exhaust pipe for discharging gas to the outside.

[0021] Compared with the prior art, the present invention has the following beneficial effects:

[0022] The present invention is equipped with a filter, a drying chamber, a drain pipe, a nitrogen inlet pipe, a lifting cylinder and a three-way valve, thereby avoiding the traditional method of regenerating the catalyst only by high temperature. When there are large molecular pollutants on the catalyst surface, they are not completely carbonized at high temperature, forming a viscous tar layer that wraps the active sites of the catalyst, affecting the efficiency of removing pollutants. The present invention can first remove the large molecular pollutants on the catalyst surface by cleaning, and then calcine the catalyst at high temperature under nitrogen protection, thereby improving the integrated processing efficiency and greatly improving the dirt removal on the catalyst surface. In addition, the nitrogen in the present device can protect the catalyst in a high temperature environment, so that the catalyst can be well restored to activity. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] Figure 1 It is a structural schematic diagram of the present invention;

[0024] Figure 2 Schematic diagram of the structure of the nitrogen input pipe of the present invention;

[0025] Figure 3 This is a schematic diagram of the calcination pipeline installation structure of the present invention;

[0026] Figure 4 This is a schematic cross-sectional view of the filter housing of the present invention;

[0027] Figure 5 Schematic diagram of the spray pipe structure of the present invention;

[0028] Figure 6 Schematic diagram of the chamfered structure of the sealing column of the present invention.

[0029] In the figure: 1. Regenerator housing; 2. Filter; 201. Filter housing; 202. Second outlet; 203. Filter screen; 204. First outlet; 205. Sealing column; 206. Chamfer; 3. Cover plate; 4. Drying chamber; 5. Calcination pipeline; 501. Discharge port; 601. Spray pipe; 602. Liquid inlet; 603. Spray head; 7. Lifting cylinder; 8. Nitrogen inlet pipe; 9. Three-way valve; 10. Exhaust pipe; 11. Support leg; 12. Drain pipe. DETAILED DESCRIPTION

[0030] The following will clearly and completely describe the technical solutions in the embodiments of the present invention in conjunction with the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0031] See also Figures 1-6 The present invention provides a technical solution: a catalyst regenerator, comprising:

[0032] The regenerator shell 1 is provided with a feed port;

[0033] The lifting cylinder 7 is fixed to a side wall of the regenerator housing 1, and the top of the lifting cylinder 7 is connected to the cover plate 3 that closes the feed port through a support block;

[0034] The filter 2 is provided at the upper end of the inner side of the regenerator housing 1 to clean and filter the catalyst;

[0035] It is convenient to clean and remove the macromolecular pollutants attached to the catalyst surface. In addition, an ultrasonic generator can be placed inside the filter housing 201 to improve the cleaning effect.

[0036] A three-way valve 9 is provided at the lower end of the filter 2, and one end of the three-way valve 9 is connected to a sewage pipe 12;

[0037] It is convenient to quickly discharge the cleaned dirty liquid;

[0038] The drying chamber 4 is provided at the other end of the three-way valve 9, and the lower end of the drying chamber 4 is connected to the calcining pipe 5 through a control valve;

[0039] It is convenient to calcine the pollutants on the catalyst surface to restore the activity of the catalyst surface;

[0040] A nitrogen inlet pipe 8 is provided on a side wall of the drying chamber 4 to introduce inert gas into the drying chamber 4 .

[0041] It is convenient to protect the catalyst during calcination or drying, and by isolating oxygen and water vapor, it prevents active components, such as catalyst copper nanoclusters, from being oxidized, agglomerated or undergoing irreversible structural changes under high temperature or reaction conditions. In addition, copper nanoclusters are prone to migration and agglomeration at high temperatures, resulting in larger particles and fewer active sites. By providing an inert environment through nitrogen, the driving force for surface atomic migration is reduced, thereby avoiding the formation of copper oxide, which is more easily sintered at high temperatures.

[0042] Preferably, the filter 2 includes a filter housing 201, a second discharge port 202, a filter screen 203, a first discharge port 204, and a sealing column 205. The filter screen 203 is fixed to the middle portion of the inner side of the filter housing 201, and the first discharge port 204 is opened inside the filter screen 203. The sealing column 205 is fixed to the lower surface of the cover plate 3, and the lower end of the sealing column 205 is inserted into the inner side of the first discharge port 204. The bottom end of the filter housing 201 has a second discharge port 202 corresponding to the three-way valve 9.

[0043] It is convenient to clean the catalyst surface, filter out the dirty liquid, and ensure the cleanliness of the catalyst surface.

[0044] Preferably, the filter screen 203 is conical.

[0045] Compared with a flat surface, it is easier to form a larger filtering area.

[0046] Preferably, a chamfer 206 is provided at the lower end of the sealing column 205 .

[0047] It is convenient for the sealing column 205 to be better inserted into the inner side of the first outlet 204 for sealing when it moves downward, and Figure 4 As shown, the sealing column 205 is staggered with the second discharge port 202. The staggered design can effectively limit the downward movement distance of the sealing column 205. At the same time, after the catalyst is cleaned in the later stage, when it is discharged through the first discharge port 204, the inner bottom surface of the filter housing 201 can cushion the falling catalyst, reducing the catalyst from directly flowing into the inside of the three-way valve 9 through the second discharge port 202, causing a greater impact on the inside of the three-way valve 9. This staggered design is conducive to unloading the falling catalyst and then flowing into the inside of the three-way valve 9.

[0048] Preferably, a spray pipe 601 is fixed to the top inner side of the filter housing 201 , a spray head 603 is provided on the lower surface of the spray pipe 601 , and one end of the spray pipe 601 passes through the outer surface of the regenerator housing 1 to form a liquid inlet 602 .

[0049] It is convenient to spray the cleaning liquid to clean the surface of the particulate matter catalyst.

[0050] Preferably, the spray pipe 601 is vortex-shaped.

[0051] It is convenient to arrange more spray heads 603, thereby forming a more uniform spray cleaning effect.

[0052] Preferably, the nitrogen inlet pipe 8 is provided at two locations, and the other one is connected to the inside of the calcining pipe 5 .

[0053] It is convenient to introduce nitrogen into the inside of the calcination pipe 5 to protect the catalyst when calcining it at high temperature, to avoid carbon accumulation on the catalyst surface in an oxygen-free environment, and to reduce the formation of an oxide layer on the copper in the catalyst.

[0054] Preferably, the calcination pipe 5 is spiral, and the lower end of the calcination pipe 5 passes through the lower surface of the regenerator shell 1 and is formed with a discharge port 501. The spiral design facilitates increasing the movement time of the catalyst inside the calcination pipe 5, thereby facilitating long-term calcination of the catalyst. The spiral design also reduces the height of the regenerator shell 1.

[0055] Preferably, a support leg 11 is fixed to the lower surface of the regenerator housing 1 .

[0056] Preferably, the drying chamber 4 is provided with an exhaust pipe 10 for discharging gas to the outside, so as to facilitate rapid drying of the catalyst after cleaning so as to facilitate subsequent calcination treatment.

[0057] The working principle and use process of the present invention are as follows: when regenerating a catalyst such as graphene-loaded copper nanoclusters, the lifting cylinder 7 drives the cover plate 3 and the sealing column 205 to move upward. At this time, the feed port on the regenerator housing 1 is opened, and the catalyst particles to be cleaned can be put into the inner side of the filter housing 201. Then the lifting cylinder 7 drives the cover plate 3 to close the feed port. The liquid inlet 602 is externally connected to the cleaning liquid, and the cleaning liquid is sprayed into the inner side of the filter housing 201 through the spray head 603 to clean the catalyst on the filter screen 203. The cleaned dirty liquid is discharged to the external purifier through the sewage pipe 12. Then the lifting cylinder 7 drives the cover plate 3 and the sealing column 205 to move upward so that the sealing column 205 exits from the inner side of the first discharge port 204. At this time, the catalyst passes through the first discharge port 204, the second discharge port 202 and the three-way valve 9 in sequence. After entering the inner side of the drying chamber 4, the lifting cylinder 7 drives the sealing column 205 to descend to block the first discharge port 204, and then the catalyst to be treated can continue to be put into the inner side of the filter housing 201. The catalyst is dried at a low temperature inside the drying chamber 4, the temperature is less than 100°C, and then flows into the inner side of the calcination pipe 5 through the control valve on the lower surface of the drying chamber 4, and the treatment temperature is increased to 200-400°C. The organic matter is decomposed by high-temperature calcination to restore the surface activity of the catalyst. Nitrogen is introduced through the nitrogen inlet pipe 8 to protect the catalyst. The core principle of using nitrogen protection during the catalyst regeneration process is to prevent the active components, such as copper nanoclusters, from being oxidized, agglomerated or undergoing irreversible structural changes under high temperature or reaction conditions by isolating oxygen and water vapor, and also to avoid the formation of copper oxide in the catalyst.

[0058] While embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions, and variations may be made to these embodiments without departing from the principles and spirit of the invention, and that the scope of the invention is defined by the appended claims and their equivalents.

Claims

1. A catalyst regenerator, characterized in that: include: A regenerator shell (1), wherein a feed port is provided on the regenerator shell (1); A lifting cylinder (7) is fixed to a side wall of the regenerator housing (1), and the top end of the lifting cylinder (7) is connected to a cover plate (3) that closes the feed port via a support block; A filter (2) is provided at the upper end of the inner side of the regenerator housing (1) to clean and filter the catalyst; A three-way valve (9) is provided at the lower end of the filter (2), and one end of the three-way valve (9) is connected to a sewage pipe (12); A drying chamber (4) is provided at the other end of the three-way valve (9), and the lower end of the drying chamber (4) is connected to a calcining pipe (5) via a control valve; A nitrogen inlet pipe (8) is provided on a side wall of the drying chamber (4) to introduce inert gas into the inside of the drying chamber (4).

2. The catalyst regenerator according to claim 1, characterized in that: The filter (2) comprises a filter housing (201), a second discharge outlet (202), a filter screen (203), a first discharge outlet (204) and a sealing column (205); the filter screen (203) is fixed to the middle of the inner side of the filter housing (201), and the first discharge outlet (204) is opened on the inner side of the filter screen (203); the sealing column (205) is fixed to the lower surface of the cover plate (3), and the lower end of the sealing column (205) is inserted into the inner side of the first discharge outlet (204); the bottom end of the filter housing (201) has a second discharge outlet (202) corresponding to the three-way valve (9).

3. The catalyst regenerator according to claim 2, characterized in that: The filter screen (203) is conical.

4. The catalyst regenerator according to claim 2, characterized in that: The lower end of the sealing column (205) is provided with a chamfer (206).

5. The catalyst regenerator according to claim 2, characterized in that: A spray pipe (601) is fixed to the top inner side of the filter housing (201), a spray head (603) is provided on the lower surface of the spray pipe (601), and one end of the spray pipe (601) passes through the outer surface of the regenerator housing (1) to form a liquid inlet (602).

6. A catalyst regenerator according to claim 5, characterized in that: The spray pipe (601) is vortex-shaped.

7. The catalyst regenerator according to claim 1, characterized in that: The nitrogen inlet pipe (8) is provided at two locations, and the other location is connected to the interior of the calcining pipe (5).

8. The catalyst regenerator according to claim 1, characterized in that: The calcination pipe (5) is spiral-shaped, and the lower end of the calcination pipe (5) passes through the lower surface of the regenerator shell (1) and is formed with a discharge port (501).

9. The catalyst regenerator according to claim 1, characterized in that: Support legs (11) are fixed to the lower surface of the regenerator housing (1).

10. The catalyst regenerator according to claim 1, characterized in that: The drying chamber (4) is provided with an exhaust pipe (10) for discharging gas to the outside.

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