Grinding and drying equipment for catalyst and process of grinding and drying equipment
By introducing multiple roundabout grinding chambers and a threaded structure into the catalyst grinding equipment, combined with a screw conveyor and a drying device, the problems of large equipment size and insufficient grinding fineness are solved, and efficient grinding and drying of catalysts are achieved.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- Filing Date
- 2023-07-14
- Publication Date
- 2026-04-07
AI Technical Summary
Existing catalyst grinding equipment is bulky and the grinding is not fine enough, resulting in a large space occupation.
The catalyst is fully ground and dried by employing multiple grinding chambers arranged in a circuitous manner and moving grinding parts with a threaded structure, combined with a screw conveyor and a drying device.
This method achieves thorough grinding of the catalyst, reduces equipment space requirements, and improves grinding efficiency and drying effect.
Smart Images
Figure CN121797462A_ABST
Abstract
Description
Technical Field
[0001] This invention relates to the field of grinding and drying, specifically to a grinding and drying device and process for a catalyst. Background Technology
[0002] Heavy oil catalytic cracking is an important petroleum processing technology, in which cracking catalysts play a crucial role. Cracking catalysts generally consist of kaolin, alumina, silica sol, alumina sol, sodium aluminate, aluminum sulfate, water glass, sepiolite, and other clays, mixed in a specific ratio until homogeneous. This homogeneous mixture is then wet-milled and spray-dried to produce the catalyst product. However, current grinding equipment lacks fineness, requiring longer grinding channels for thorough catalyst grinding. These longer channels result in larger overall equipment size and greater space requirements, a problem that urgently needs to be addressed. Summary of the Invention
[0003] To address the above problems, this invention proposes a grinding and drying device and process for catalysts.
[0004] The present invention provides a grinding and drying device for a catalyst, comprising a stationary grinding element, a moving grinding element, and a drying device;
[0005] A grinding chamber is formed between the stationary grinding part and the moving grinding part. The width of the grinding chamber gradually decreases from the feed end to the discharge end of the grinding chamber. The grinding chamber includes multiple grinding chambers connected in sequence. The multiple grinding chambers are arranged in a roundabout manner. The grinding surface of the moving grinding part is provided with threads.
[0006] The drying device is connected to the discharge end of the grinding chamber.
[0007] Preferably, the device further includes a first screw conveyor, a motor, an elastic element, a first contact, and a second contact;
[0008] The first screw conveyor is located on one side of the feed end of the grinding chamber and is used to convey the catalyst into the grinding chamber.
[0009] The motor is connected to the moving grinding component via an elastic element, and the motor is used to drive the moving grinding component to rotate.
[0010] The moving grinding part is provided with an annular groove. The first contact and the second contact are connected to the power supply circuit of the first screw conveyor. The first contact is slidably installed in the annular groove. The first contact moves along the rotation axis of the moving grinding part. During the movement of the first contact, it is in a disengaged / aggressive state with the second contact.
[0011] Preferably, the grinding part is provided with an overflow hole near the feed end of the grinding chamber, and a shut-off valve is provided in the overflow hole.
[0012] Preferably, it also includes a third contact and a fourth contact;
[0013] The moving grinding element is provided with an annular groove. The third contact and the fourth contact are connected to the power supply circuit of the shut-off valve. The third contact is slidably installed in the annular groove. The third contact moves along the rotation axis of the moving grinding element. During the movement of the third contact, it is in a disengaged / aggressive state with the fourth contact.
[0014] Preferably, the drying device includes a second screw conveyor and a drying chamber;
[0015] The second screw conveyor is connected to the discharge end of the grinding chamber. The discharge end of the second screw conveyor is equipped with an atomizing nozzle, which is located inside the drying chamber. The atomizing nozzle is used to atomize and spray the catalyst horizontally or obliquely upward.
[0016] The bottom of the drying chamber, near the atomizing nozzle, is connected to the feed end of the first screw conveyor.
[0017] Preferably, the second screw conveyor is connected to the discharge end of the grinding chamber via a pipe, and a heating wire is arranged on the pipe.
[0018] A grinding and drying process for a catalyst.
[0019] Molecular sieve and water are mixed and pulped to obtain molecular sieve slurry;
[0020] The clay powder matrix and water are mixed and slurryed to obtain the first slurry;
[0021] The aluminum-based carrier powder matrix and water are mixed and slurried to obtain the second slurry;
[0022] The molecular sieve slurry, the first slurry, and the second slurry are mixed; the mixed liquid is then ground and dried using the grinding and drying equipment described in any one of the claims.
[0023] The present invention proposes a catalyst grinding and drying device, in which multiple grinding chambers are used to fully grind the catalyst to obtain a fully ground catalyst product. The multiple grinding chambers are arranged in a roundabout manner to reduce the space occupied by the entire grinding device. Attached Figure Description
[0024] Figure 1 This is a cross-sectional view of the grinding and drying equipment according to an embodiment of the present invention;
[0025] Figure 2 This is an enlarged view of the connection point between the motor and the moving grinding part;
[0026] Figure 3 This is an enlarged view of the atomizing nozzle.
[0027] In the diagram: stationary grinding component-11, moving grinding component-12, first grinding chamber-21, second grinding chamber-22, third grinding chamber-23, first screw conveyor-31, second screw conveyor-32, third screw conveyor-33, motor-41, elastic component-42, first contact-51, second contact-52, third contact-53, fourth contact-54, overflow hole-6, hot air pipe-7, drying chamber-8, atomizing nozzle-9. Detailed Implementation
[0028] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.
[0029] An embodiment of the present invention provides a catalyst grinding and drying device, comprising a fixed grinding element 11, a movable grinding element 12, and a drying device; a grinding chamber is formed between the fixed grinding element 11 and the movable grinding element 12, the width of the grinding chamber gradually decreases from the feed end to the discharge end of the grinding chamber, the grinding chamber includes multiple sequentially connected grinding chambers, the multiple grinding chambers are arranged in a circuitous manner, and the grinding surface of the movable grinding element 12 is provided with threads; the drying device is connected to the discharge end of the grinding chamber.
[0030] By thoroughly grinding the catalyst in multiple grinding chambers, a well-ground catalyst product can be obtained. The multiple grinding chambers are arranged in a roundabout manner, which reduces the space occupied by the entire grinding equipment.
[0031] For example, such as Figure 1 As shown, the moving grinding element 12 is located above the fixed grinding element 11. Both the moving grinding element 12 and the fixed grinding element 11 are rotating structures. The moving grinding element 12 can rotate, while the fixed grinding element 11 cannot. A cooling pipe is provided inside the fixed grinding element 11, and the flowing coolant in the cooling pipe can remove the heat generated by the friction between the fixed grinding element 11 and the moving grinding element 12. A grinding chamber is formed between the moving grinding element 12 and the fixed grinding element 11. The feed end of the grinding chamber is located at the top of the grinding equipment, and the discharge end of the grinding chamber is located at the bottom of the grinding equipment. Figure 1 As can be seen, the width of the grinding chamber gradually decreases from the feed end to the discharge end. The wider feed end is conducive to the catalyst entering the grinding chamber. As the width of the grinding chamber gradually decreases, the extrusion pressure on the catalyst gradually increases, and the catalyst is gradually ground into small particles.
[0032] The grinding chamber comprises three sequentially connected grinding chambers, from the feed end to the discharge end. These three grinding chambers are named the first grinding chamber 21, the second grinding chamber 22, and the third grinding chamber 23, respectively. The catalyst flows downwards in the first grinding chamber 21. To increase the flow velocity of the catalyst in the first grinding chamber 21, the grinding surface of the moving grinding element 12 near the first grinding chamber 21 is provided with threads. During the rotation of the moving grinding element 12, the threads drive the catalyst downwards, increasing the downward flow velocity of the catalyst in the first grinding chamber 21. Simultaneously, due to the presence of the threads, the grinding surface of the moving grinding element 12 is rougher, improving the catalyst crushing effect. The catalyst flows upwards in the second grinding chamber 22. To achieve upward flow, the grinding surface of the moving grinding element 12 near the second grinding chamber 22 is provided with threads. During the rotation of the moving grinding element 12, the threads drive the catalyst upwards. Simultaneously, due to the presence of the threads, the grinding surface of the moving grinding element 12 is rougher, improving the catalyst crushing effect. The catalyst flows downward in the third grinding chamber 23. To increase the flow velocity of the catalyst in the first grinding chamber 21, the grinding surface of the moving grinding element 12 near the third grinding chamber 23 may be threaded. During the rotation of the moving grinding element 12, the thread can drive the catalyst downward, increasing the downward flow velocity of the catalyst in the first grinding chamber 21. At the same time, due to the presence of the thread, the grinding surface of the moving grinding element 12 is rougher, improving the crushing effect on the catalyst. In specific designs, the grinding surfaces of the moving grinding element 12 near the first grinding chamber 21 and the third grinding chamber 23 may also be without threads.
[0033] The device further includes a first screw conveyor 31, a motor 41, an elastic element 42, a first contact 51, and a second contact 52. The first screw conveyor 31 is located on the feed end side of the grinding chamber and is used to convey the catalyst into the grinding chamber. The motor 41 is connected to the moving grinding element 12 through the elastic element 42 and is used to drive the moving grinding element 12 to rotate. The moving grinding element 12 is provided with an annular groove. The first contact 51 and the second contact 52 are connected to the power supply circuit of the first screw conveyor 31. The first contact 51 is slidably installed in the annular groove and moves along the rotation axis of the moving grinding element 12. During the movement, the first contact 51 is in a disengaged / aggressive state with the second contact 52.
[0034] For example, such as Figure 1 and Figure 2As shown, there are two first screw conveyors 31, symmetrically installed above the feed end of the grinding chamber. The two first screw conveyors 31 rotate synchronously, conveying the catalyst into the grinding chamber. After the first screw conveyors 31 stop rotating, the catalyst will not flow into the grinding chamber. The motor 41 is mounted on the external structure. The output shaft of the motor 41 has multiple mounting holes, and springs are provided at the bottom of the mounting holes. Of course, the elastic element 42 is not limited to springs. The top of the moving grinding element 12 has multiple mounting rods, which slide in the mounting holes. The mounting rods abut against the springs. The moving grinding element 12 is allowed to move in the vertical direction. When the moving grinding element 12 moves, it drives the mounting rods to move, and the movement of the mounting rods will compress the springs. The top surface of the moving grinding member 12 is coaxially provided with an annular groove. The first contact 51 is specifically mounted on a rod, which slides in the annular groove. The rod is also vertically slidably mounted on an external slide rail. When the moving grinding member 12 rotates, the rod slides relative to the annular groove. The second contact 52 is fixed to the external structure. When the moving grinding member 12 is not moving upward, the second contact 52 abuts against the first contact 51, thereby connecting the conductive circuit of the first screw conveyor 31 and energizing the first screw conveyor 31. After the moving grinding member 12 moves upward, the second contact 52 disengages from the first contact 51, thereby disconnecting the conductive circuit of the first screw conveyor 31 and de-energizing the first screw conveyor 31, stopping its operation.
[0035] Under normal grinding conditions, the motor 41 drives the moving grinding part 12 to rotate. The moving grinding part 12 will not move upward, and the first contact 51 remains stationary. Thus, the first contact 51 slides relative to the annular groove. The first contact 51 abuts against the second contact 52. Because the first contact 51 abuts against the second contact 52, the first screw conveyor 31 remains energized and pushes the catalyst into the grinding chamber. When there is a large amount of catalyst in the grinding chamber, the supply of catalyst into the grinding chamber should not continue. The supply of catalyst into the grinding chamber should be stopped. At this time, the moving grinding element 12 is lifted a small distance by the catalyst in the grinding chamber, and the first contact 51 moves upward accordingly. The first contact 51 and the second contact 52 separate, the conductive circuit of the first screw conveyor 31 is disconnected, and the first screw conveyor 31 is de-energized and stops working. When the amount of catalyst in the grinding chamber decreases, the moving grinding element 12 returns to its original position under its own gravity. At this time, the first contact 51 and the second contact 52 return to contact, and the conductive circuit of the first screw conveyor 31 is turned on. The first screw conveyor 31 is energized and continues to supply catalyst into the grinding chamber.
[0036] An overflow hole 6 is provided at the position of the fixed grinding part 11 near the feed end of the grinding chamber, and a shut-off valve is provided inside the overflow hole 6.
[0037] Since it is a wet grinding process, the catalyst body flows along the grinding chamber during the grinding process. The density of water is less than that of the catalyst body, so water will accumulate in the upper part of the first chamber. The water occupies the space of the first chamber and affects the grinding of the catalyst. It is necessary to drain the water in the upper part of the first chamber at intervals. Therefore, an overflow hole 6 is provided at the position of the fixed grinding part 11 near the feed end of the grinding chamber. A shut-off valve is provided in the overflow hole 6. When the shut-off valve is opened, the water in the first chamber is discharged through the overflow hole 6.
[0038] For example, such as Figure 1 As shown, the fixed grinding part 11 is provided with two overflow holes 6, which are symmetrically arranged. A pipe is inserted into the outside of the overflow hole 6. The shut-off valve is an electromagnetic shut-off valve, which can be opened / closed by turning on and off the electromagnetic shut-off valve.
[0039] It also includes a third contact 53 and a fourth contact 54; the moving grinding member 12 is provided with an annular groove, the third contact 53 and the fourth contact 54 are connected to the power supply circuit of the shut-off valve, the third contact 53 is slidably installed in the annular groove, the third contact 53 moves along the rotation axis of the moving grinding member 12 with the moving grinding member 12, and the third contact 53 has a disengaged / aggressive state with the fourth contact 54 during the movement.
[0040] Examples such as Figure 1 As shown, the third contact 53 is specifically mounted on a rod, which slides in an annular groove. The rod is also vertically slidably mounted on an external slide rail. When the moving grinding element 12 rotates, the rod slides relative to the annular groove. The fourth contact 54 is fixed to the external structure. When the moving grinding element 12 is not moving upwards, the third contact 53 and the fourth contact 54 are disengaged. At this time, the conductive circuit of the electromagnetic shut-off valve is disconnected, and the electromagnetic shut-off valve remains closed. After the moving grinding element 12 moves upwards, the third contact 53 and the fourth contact 54 abut against each other, thereby connecting the conductive circuit of the electromagnetic shut-off valve, opening the electromagnetic shut-off valve, and allowing water in the first chamber to drain through the overflow hole 6. Simultaneously, the first contact 51 and the second contact 52 disconnect, and the first screw conveyor 31 stops conveying the catalyst, thus preventing catalyst leakage from the overflow hole 6.
[0041] The drying device includes a second screw conveyor 32, a hot air pipe 7, and a drying chamber 8. The second screw conveyor 32 is connected to the discharge end of the grinding chamber. The discharge end of the second screw conveyor 32 is equipped with an atomizing nozzle 9, which is located inside the drying chamber 8. The atomizing nozzle 9 is used to atomize and spray the catalyst horizontally or obliquely upward. The end of the hot air pipe 7 is located in the atomizing nozzle 9. The bottom of the drying chamber 8 near the atomizing nozzle 9 is connected to the feed end of the first screw conveyor 31.
[0042] Examples such as Figure 1 and Figure 3As shown, the drying chamber 8 is located at the left end of the feed end of the first screw conveyor 31, and the left end of the drying chamber 8 is directly connected to the feed end of the first screw conveyor 31. The right end of the drying chamber 8 is provided with a material collection trough. The second screw conveyor 32 is located on the left side of the drying chamber 8. The discharge end of the second screw conveyor 32 is provided with an atomizing nozzle 9, which is located inside the drying chamber 8. The second screw conveyor 32 is connected to the discharge end of the grinding chamber through a pipe. The discharge end of the grinding chamber is provided with a third screw conveyor 33, which is fixed to the bottom of the moving grinding element 12 and rotates synchronously with the moving grinding element 12. The third screw conveyor 33 pushes the catalyst discharged from the grinding chamber to the pipe. The catalyst discharged from the discharge end of the grinding chamber enters the second screw conveyor 32 through the pipe. The second screw conveyor 32 pushes the catalyst to the atomizing nozzle 9. The atomizing nozzle 9 is used to atomize and spray the catalyst at an angle upward. At the same time, the hot air pipe 7 sprays out high-temperature hot air, which heats the atomized catalyst to remove moisture, thereby achieving the drying of the catalyst.
[0043] The atomized catalyst moves along a parabolic path. Larger, less-ground catalyst particles are heavier and travel a shorter horizontal distance, so they fall to the left end of the drying chamber 8 and enter the first screw conveyor 31, where they are transported to the grinding chamber for secondary grinding. Smaller, less-ground catalyst particles are lighter and travel a longer horizontal distance, so they fall into the collection trough at the right end of the drying chamber 8 and do not require secondary grinding.
[0044] Furthermore, the second screw conveyor 32 is connected to the discharge end of the grinding chamber through a pipe. A heating wire is arranged on the pipe to heat the water in the catalyst conveyed in the pipe, raising the water to a predetermined temperature, which is beneficial for the evaporation of water after atomization and spraying.
[0045] A grinding and drying process for the catalyst is also proposed, including the following steps:
[0046] Molecular sieve and water are mixed and pulped to obtain molecular sieve slurry;
[0047] The clay powder matrix and water are mixed and slurryed to obtain the first slurry;
[0048] The aluminum-based carrier powder matrix and water are mixed and slurried to obtain the second slurry;
[0049] The molecular sieve slurry, the first slurry, and the second slurry are mixed; the mixed liquid is then ground and dried using the aforementioned grinding and drying equipment.
[0050] Although embodiments of the invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the invention, the scope of which is defined by the appended claims and their equivalents.
Claims
1. A grinding and drying apparatus for a catalyst, characterized in that, It includes a stationary grinding part (11), a moving grinding part (12), and a drying device; A grinding chamber is formed between the fixed grinding part (11) and the moving grinding part (12). The width of the grinding chamber gradually decreases from the feed end to the discharge end of the grinding chamber. The grinding chamber includes multiple grinding chambers connected in sequence. The multiple grinding chambers are arranged in a roundabout manner. The grinding surface of the moving grinding part (12) is provided with threads. The drying device is connected to the discharge end of the grinding chamber.
2. The catalyst grinding and drying equipment according to claim 1, characterized in that, The device also includes a first screw conveyor (31), a motor (41), an elastic element (42), a first contact (51), and a second contact (52); The first screw conveyor (31) is located on one side of the feed end of the grinding chamber. The first screw conveyor (31) is used to convey the catalyst into the grinding chamber. The motor (41) is connected to the moving grinding part (12) through the elastic element (42), and the motor (41) is used to drive the moving grinding part (12) to rotate; The moving grinding part (12) is provided with an annular groove. The first contact (51) and the second contact (52) are connected to the power supply circuit of the first screw conveyor (31). The first contact (51) is slidably installed in the annular groove. The first contact (51) moves along the rotation axis of the moving grinding part (12) with the moving grinding part (12). During the movement of the first contact (51), it is in a disengaged / aggressive state with the second contact (52).
3. The catalyst grinding and drying equipment according to claim 1, characterized in that, An overflow hole (6) is provided near the feed end of the grinding chamber on the fixed grinding part (11), and a stop valve is provided inside the overflow hole (6).
4. The catalyst grinding and drying equipment according to claim 3, characterized in that, It also includes a motor (41), an elastic element (42), a third contact (53), and a fourth contact (54); The motor (41) is connected to the moving grinding part (12) through the elastic element (42), and the motor (41) is used to drive the moving grinding part (12) to rotate; The moving grinding element (12) is provided with an annular groove. The third contact (53) and the fourth contact (54) are connected to the power supply circuit of the shut-off valve. The third contact (53) is slidably installed in the annular groove. The third contact (53) moves along the rotation axis of the moving grinding element (12) with the moving grinding element (12). During the movement of the third contact (53), it is in a disengaged / aggressive state with the fourth contact (54).
5. The catalyst grinding and drying equipment according to claim 1, characterized in that, The drying device includes a second screw conveyor (32), a hot air duct (7), and a drying chamber (8); The second screw conveyor (32) is connected to the discharge end of the grinding chamber. The discharge end of the second screw conveyor (32) is provided with an atomizing nozzle (9). The atomizing nozzle (9) is located inside the drying box (8). The atomizing nozzle (9) is used to atomize and spray the catalyst horizontally or obliquely upward. The end of the hot air pipe (7) is located in the atomizing nozzle (9). The bottom of the drying chamber (8) near the atomizing nozzle (9) is connected to the feed end of the first screw conveyor (31).
6. The catalyst grinding and drying equipment according to claim 5, characterized in that, The second screw conveyor (32) is connected to the discharge end of the grinding chamber through a pipe, and a heating wire is arranged on the pipe.
7. A grinding and drying process for a catalyst, characterized in that, Molecular sieve and water are mixed and pulped to obtain molecular sieve slurry; The clay powder matrix and water are mixed and slurryed to obtain the first slurry; The aluminum-based carrier powder matrix and water are mixed and slurried to obtain the second slurry; The molecular sieve slurry, the first slurry, and the second slurry are mixed; the mixed liquid is then ground and dried using the grinding and drying equipment described in any one of claims 1-6.