A high-pressure reactor anti-fouling pretreatment device

Abstract

This application relates to a pretreatment device for preventing scaling in a high-pressure reactor. Installed within the reactor, it includes an inner cylinder, an outer cylinder, multiple sealing plates, and multiple air bladders. The inner cylinder is rotatably positioned within the reactor and connected to an external air source. The outer cylinder is fitted around the inner cylinder and fixedly connected to it. Multiple openings are evenly arranged circumferentially on the outer wall of the outer cylinder. The sealing plates are located outside the outer cylinder and are movable relative to their corresponding openings. One side of each air bladder is fixedly connected to a sealing plate, and the other side is fixedly connected to the outer wall of the inner cylinder and communicates with it. When a scale inhibitor is injected into the reactor, the air bladders expand outwards towards the outer cylinder, and the corresponding sealing plates move away from the openings, gradually occupying the internal cavity of the reactor. At this point, most of the internal cavity of the reactor is occupied by the air bladders, requiring only a small amount of scale inhibitor to form a uniform coating on the inner wall of the reactor, enhancing the scale inhibition effect while reducing costs.

Description

Technical Field

[0001] This application relates to the field of reactor technology, and in particular to a pretreatment device for preventing scaling in high-pressure reactors. Background Technology

[0002] Currently, in the hydrometallurgical process for laterite nickel ore, the ore slurry, sulfuric acid, and steam are typically injected into a high-pressure reactor for leaching nickel and cobalt from the ore. This process also produces precipitates from the hydrolysis of Fe3+ and Al3+ metal ions, forming scale on the inner wall of the reactor.

[0003] In existing technologies, scale inhibitors are typically added to the slurry during leaching to slow down the adhesion of precipitates to the inner wall of the high-pressure reactor, thereby achieving a scale inhibition effect. However, this method consumes a large amount of scale inhibitor while the scale inhibition effect is unsatisfactory. Utility Model Content

[0004] In view of this, it is necessary to provide a pretreatment device for preventing scaling in high-pressure reactors to solve the problem that the scale inhibitor is consumed in large quantities but the scale inhibition effect is not good in the prior art.

[0005] This application provides a pretreatment device for preventing scaling in a high-pressure reactor, installed in the reactor, including an inner cylinder, an outer cylinder, multiple sealing plates, and multiple air bladders. The inner cylinder is rotatably disposed in the reactor and connected to an external air source. The outer cylinder is sleeved outside the inner cylinder and fixedly connected to it. Multiple openings are evenly arranged circumferentially on the outer wall of the outer cylinder. Each sealing plate corresponds to one of the openings and is located outside the outer cylinder. Each sealing plate is movable relative to its corresponding opening, moving to a position to open or close the opening. The multiple air bladders are respectively connected to the multiple sealing plates. The sealing plates are matched one-to-one. One side of the airbag is fixedly connected to the sealing plate, and the other side of the airbag is fixedly connected to the outer wall of the inner cylinder and communicates with the inner cylinder. The airbag has a contracted state and an expanded state. When the airbag is in the contracted state, the airbag contracts toward the gap between the inner cylinder and the outer cylinder, and the corresponding sealing plate moves toward the opening until it closes the opening. When the airbag is in the expanded state, the airbag expands toward the outside of the outer cylinder, and the corresponding sealing plate moves away from the opening until it gradually occupies the internal cavity of the reactor.

[0006] Furthermore, the opening is a frame shape extending vertically, and the airbag is a long strip structure extending vertically.

[0007] Furthermore, when the airbag is in a contracted state, the portion of the airbag near the sealing plate has folds.

[0008] Furthermore, the airbag has connection ports on both sides. One connection port of the airbag is connected to the corresponding sealing plate, and the other connection port of the airbag is connected to the outer wall of the inner cylinder. A sealed cavity is formed between the airbag, the sealing plate, and the inner cylinder. An air hole is formed at the connection port of the outer cylinder facing it, which connects its interior to the sealed cavity.

[0009] Furthermore, it also includes multiple guide members respectively disposed in multiple sealed cavities, the guide members connecting the inner cylinder and the sealing plate to limit the movement of the sealing plate in a direction perpendicular to the opening.

[0010] Furthermore, the guide includes two telescopic rods and a spring. One end of the two telescopic rods is hinged to the sealing plate, and the other end of the two telescopic rods is slidably hinged to the inner cylinder in the vertical direction. The two telescopic rods are arranged sequentially in the vertical direction, and the distance between them gradually increases in the direction away from the sealing plate. The two ends of the spring are fixedly connected to the two telescopic rods respectively, and the spring is always in a tensioned state.

[0011] Furthermore, each of the sealed cavities has multiple guide elements, which are arranged sequentially in a vertical direction.

[0012] Furthermore, the sealing plate is an arc-shaped plate, and a sealing ring is provided on the side of it near the outer cylinder.

[0013] Furthermore, the top end of the inner cylinder extends outside the reactor and is connected to the output end of the reactor's drive unit, which drives the inner cylinder to rotate.

[0014] Furthermore, the portion of the inner cylinder located outside the reactor is equipped with an air nozzle, and multiple stirring rods are fixedly connected to the outer wall of the outer cylinder.

[0015] Compared to existing technologies, this anti-scaling pretreatment device replaces the stirring shaft of the reactor. When the reactor is in operation or shutdown, the air bladder is in a contracted state, contracting towards the gap between the inner and outer cylinders. The corresponding sealing plate moves towards the opening until it closes. At this time, the coating device does not occupy the internal space of the reactor. When scale inhibitor is injected into the reactor, the air bladder expands outwards towards the outer cylinder. The corresponding sealing plate moves away from the opening until it gradually occupies the internal cavity of the reactor. At this point, most of the internal cavity of the reactor is occupied by the air bladder, effectively reducing the actual internal space of the reactor. Therefore, only a small amount of scale inhibitor is needed to form a uniform coating on the inner wall of the reactor. Before the coating dissolves, it prevents precipitates from adhering to the inner wall of the reactor. After dissolving, the coating reacts with the precipitates in the slurry, precisely acting near the inner wall of the reactor, greatly enhancing the scale inhibition effect while reducing scale inhibition costs. Attached Figure Description

[0016] Figure 1 A schematic diagram of the overall structure of the anti-scaling pretreatment device for a high-pressure reactor provided in this application embodiment when the air bladder is in a contracted state.

[0017] Figure 2 The anti-scaling pretreatment device for high-pressure reactors provided in the embodiments of this application Figure 1 Sectional view of plane AA;

[0018] Figure 3 A schematic diagram of the overall structure of the airbag in the anti-scaling pretreatment device for the high-pressure reactor provided in this embodiment of the application when the airbag is in a collision state;

[0019] Figure 4 The anti-scaling pretreatment device for high-pressure reactors provided in the embodiments of this application Figure 3 Sectional view of the middle BB plane;

[0020] Figure 5 The anti-scaling pretreatment device for high-pressure reactors provided in the embodiments of this application Figure 2 Sectional view of the C-plane;

[0021] Figure 6 The anti-scaling pretreatment device for high-pressure reactors provided in the embodiments of this application Figure 4 Sectional view of the DD plane;

[0022] Figure 7 This is a schematic diagram of the outer cylinder in the anti-scaling pretreatment device for high-pressure reactors provided in the embodiments of this application;

[0023] Figure 8 This is a schematic diagram of the installation of the stirring rod in the anti-scaling pretreatment device for the high-pressure reactor provided in the embodiments of this application. Detailed Implementation

[0024] The preferred embodiments of this application are described in detail below with reference to the accompanying drawings, which constitute a part of this application and are used together with the embodiments of this application to illustrate the principles of this application, but are not intended to limit the scope of this application.

[0025] like Figure 1-4As shown, this application provides a high-pressure reactor anti-scaling pretreatment device 200, installed in a reactor 100. The anti-scaling pretreatment device 200 includes an inner cylinder 210, an outer cylinder 220, multiple sealing plates 230, and multiple airbags 240. The inner cylinder 210 is rotatably disposed within the reactor 100 and is connected to an external air source. The outer cylinder 220 is sleeved around the inner cylinder 210 and fixedly connected to it. Multiple openings 221 are evenly arranged circumferentially on the outer wall of the outer cylinder 220. Each sealing plate 230 corresponds to one of the openings 221 and is located outside the outer cylinder 220. Each sealing plate 230 can move relative to its corresponding opening 221 to open or close the opening 221. The multiple airbags 240... Each of the multiple sealing plates 230 corresponds to one of them. One side of the airbag 240 is fixedly connected to the sealing plate 230, and the other side of the airbag 240 is fixedly connected to the outer wall of the inner cylinder 210 and communicates with the inner cylinder 210. The airbag 240 has a contracted state and an inflated state. When the airbag 240 is in the contracted state, the airbag 240 contracts toward the gap between the inner cylinder 210 and the outer cylinder 220, and the corresponding sealing plate 230 moves toward the opening 221 until the opening 221 is closed. When the airbag 240 is in the inflated state, the airbag 240 expands toward the outside of the outer cylinder 220, and the corresponding sealing plate 230 moves away from the opening 221 until it gradually occupies the internal cavity of the reactor 100.

[0026] In practice, the anti-scaling pretreatment device 200 replaces the stirring shaft of the reactor 100. When the reactor 100 is in operation or shutdown, the airbag 240 is in a contracted state, contracting towards the gap between the inner cylinder 210 and the outer cylinder 220, and the corresponding sealing plate 230 moves towards the opening 221 until it closes the opening 221. At this time, the anti-scaling pretreatment device 200 does not occupy the internal space of the reactor 100. When the scale inhibitor is injected into the reactor 100, the airbag 240 is in an inflated state, expanding towards the outside of the outer cylinder 220, and the corresponding sealing plate 230 moves away from the opening 221 until it gradually occupies the internal cavity of the reactor 100. At this time, most of the internal cavity of the reactor 100 is occupied by the airbag 240, effectively reducing the actual internal space of the reactor 100. As a result, only a small amount of scale inhibitor needs to be poured in to form a uniform coating on the inner wall of the reactor, enhancing the scale inhibition effect while reducing costs.

[0027] In this embodiment, the inner cylinder 210 has an air chamber that communicates with the air bag 240. The bottom of the inner cylinder 210 is rotatably connected to the cross support rod provided inside the reactor 100. The top of the inner cylinder 210 extends to the outside of the reactor 100 and is rotatably and sealingly connected to the top of the reactor 100.

[0028] In one embodiment, the top end of the inner cylinder 210 extends outside the reactor 100 and is connected to the output end of the drive unit of the reactor 100. The drive unit drives the inner cylinder 210 to rotate, thereby causing the coating device 200 to rotate and replace the stirring shaft of the reactor 100. The drive unit includes a motor and a reducer, with the motor connected to the inner cylinder 210 via the reducer. In this case, a stirring shaft is not required inside the reactor 100; the inner cylinder 210 can replace the stirring shaft.

[0029] To control the contraction and expansion of the airbag 240, in one embodiment, the portion of the inner cylinder 210 located outside the reactor 100 is equipped with an air nozzle. The air nozzle is normally closed. When the air source is connected to the air nozzle, air can be supplied to the air chamber of the inner cylinder 210, causing the airbag 240 to expand. Alternatively, a suction device can be connected to the air nozzle to cause the airbag 240 to contract.

[0030] It is understood that air or water can be injected into the airbag 240, and the filling medium can cause the airbag 240 to contract and expand to achieve the purpose of this application.

[0031] like Figure 8 As shown, to improve stirring efficiency, multiple stirring rods 260 are fixedly connected to the outer wall of the outer cylinder 220. It is understood that the shape and angle of the stirring rods 260 are not limited, as long as they do not interfere with the sealing plate 230 and the airbag 240.

[0032] In this embodiment, the outer cylinder 220 is sleeved outside the inner cylinder 210, and a gap is formed between the outer cylinder 220 and the inner cylinder 210 to accommodate the airbag 240 in the contracted state, until the sealing plate 230 is tightly attached to the outer cylinder 220 to close the opening 221. At this time, a structure is formed between the sealing plate 230 and the outer cylinder 220 to wrap the airbag 240, so as to prevent the liquid inside the reactor 100 from entering the inner cylinder 210 during normal operation.

[0033] It is understandable that during the switching between the inflated and deflated states of the airbag 240, liquid will inevitably enter the inner cylinder 210. Therefore, a drain port can be provided at the bottom of the outer cylinder 220. Of course, even if liquid enters the inner cylinder 210, it will not affect the implementation of the scheme in this application.

[0034] like Figure 7As shown, in one embodiment, the opening 221 is a frame shape extending in the vertical direction, and the airbag 240 is a long strip structure extending in the vertical direction.

[0035] In another embodiment, multiple openings 221 can be provided, and the multiple openings 221 are arranged sequentially in the vertical direction. Similarly, the number of sealing plates 230 and airbags 240 should be set accordingly.

[0036] In this embodiment, multiple sealing plates 230 correspond one-to-one with multiple openings 221 and are located outside the outer cylinder 220. The sealing plates 230 can move relative to the corresponding openings 221 and move to a position to open or close the openings 221.

[0037] The sealing plate 230 is an arc-shaped plate, and a sealing ring is provided on the side of it near the outer cylinder 220.

[0038] In this embodiment, multiple airbags 240 correspond one-to-one with multiple sealing plates 230. One side of each airbag 240 is fixedly connected to the sealing plate 230, and the other side of each airbag 240 is fixedly connected to the outer wall of the inner cylinder 210 and is connected to the inner cylinder 210.

[0039] Meanwhile, the airbag 240 has a contracted state and an inflated state. When the airbag 240 is in the contracted state, the airbag 240 contracts toward the gap between the inner cylinder 210 and the outer cylinder 220, and the corresponding sealing plate 230 moves toward the opening 221 until the opening 221 is closed. When the airbag 240 is in the inflated state, the airbag 240 expands toward the outside of the outer cylinder 220, and the corresponding sealing plate 230 moves away from the opening 221 until it gradually occupies the internal cavity of the reactor 100.

[0040] To increase the extension distance of the airbag 240 beyond the outer cylinder 220 and occupy more space inside the reactor 100, in one embodiment, when the airbag 240 is in a contracted state, a pleated portion 241 is formed on the portion of the airbag 240 near the sealing plate 230. When the airbag 240 switches from a contracted state to an inflated state, the pleated portion 241 is gradually flattened.

[0041] In one embodiment, the airbag 240 has connection ports on both sides. One connection port of the airbag 240 is connected to the corresponding sealing plate 230, and the other connection port of the airbag 240 is connected to the outer wall of the inner cylinder 210. A sealed cavity is formed between the airbag 240, the sealing plate 230, and the inner cylinder 210. An air hole is formed at the connection port of the outer cylinder 220 facing it, which connects its interior to the sealed cavity.

[0042] By providing the connection port of the airbag 240, a guide 250 can be provided in the sealed cavity to limit the sliding direction of the sealing plate 230. In one embodiment, the anti-scaling pretreatment device 200 further includes a plurality of guides 250 respectively provided in a plurality of sealed cavities. The guides 250 connect the inner cylinder 210 and the sealing plate 230 to limit the movement of the sealing plate 230 in a direction perpendicular to the opening 221.

[0043] like Figure 5-6 As shown, in one embodiment, the guide member 250 includes two telescopic rods 251 and a spring 252. One end of the two telescopic rods 251 is hinged to the sealing plate 230, and the other end of the two telescopic rods 251 is slidably hinged to the inner cylinder 210 in the vertical direction. The two telescopic rods 251 are arranged sequentially in the vertical direction, and the distance between them gradually increases in the direction away from the sealing plate 230. The two ends of the spring 252 are fixedly connected to the two telescopic rods 251 respectively, and the spring 252 is always in a tensioned state.

[0044] Since the elastic deformation of the spring 252 is limited, each of the sealed cavities has multiple guide members 250, which are arranged sequentially in the vertical direction to reduce the deformation of a single spring 252.

[0045] Compared with existing technologies, this anti-scaling pretreatment device 200 replaces the stirring shaft of the reactor 100. When the reactor 100 is in operation or shutdown, the airbag 240 is in a contracted state, contracting towards the gap between the inner cylinder 210 and the outer cylinder 220, and the corresponding sealing plate 230 moves towards the opening 221 until it closes the opening 221. At this time, the anti-scaling pretreatment device 200 does not occupy the internal space of the reactor 100. When scale inhibitor is injected into the reactor 100, the airbag 240 is in an inflated state, expanding towards the outside of the outer cylinder 220, and the corresponding sealing plate 230 moves away from the opening 221 until it gradually occupies the internal cavity of the reactor 100. At this time, most of the internal cavity of the reactor 100 is occupied by the airbag 240, effectively reducing the actual internal space of the reactor 100, so that only a small amount of scale inhibitor needs to be poured in, reducing costs.

[0046] The above description is merely a preferred embodiment of this application, but the scope of protection of this application is not limited thereto. Any variations or substitutions that can be easily conceived by those skilled in the art within the scope of the technology disclosed in this application should be included within the scope of protection of this application.

Claims

1. A high-pressure reactor anti-fouling pretreatment device installed in a reactor, characterized in that, include: An inner cylinder is rotatably disposed within the reactor, and the inner cylinder is connected to an external gas source. An outer cylinder is fitted over the inner cylinder and fixedly connected to the inner cylinder. The outer wall of the outer cylinder has multiple openings evenly arranged along its circumference. Multiple sealing plates, each corresponding to one of the multiple openings and located outside the outer cylinder, are movable relative to their respective openings and can be moved to a position to open or close the openings. Multiple airbags are provided, each corresponding to one of the sealing plates. One side of each airbag is fixedly connected to the sealing plate, and the other side of each airbag is fixedly connected to the outer wall of the inner cylinder and communicates with the inner cylinder. The airbag has a contracted state and an expanded state. When the airbag is in the contracted state, it contracts toward the gap between the inner cylinder and the outer cylinder, and the corresponding sealing plate moves toward the opening until it closes the opening. When the airbag is in the expanded state, it expands toward the outside of the outer cylinder, and the corresponding sealing plate moves away from the opening until it gradually occupies the internal cavity of the reactor.

2. The high pressure reactor anti-fouling pretreatment apparatus according to claim 1, characterized in that, The opening is a frame shape extending vertically, and the airbag is a long strip structure extending vertically.

3. The high pressure reactor anti-fouling pretreatment apparatus according to claim 1, characterized in that, When the airbag is in a contracted state, the portion of the airbag near the sealing plate forms a pleated area.

4. The high pressure reactor anti-fouling pretreatment apparatus of claim 1, wherein, Both sides of the airbag have connection ports. One connection port of the airbag is connected to the corresponding sealing plate, and the other connection port of the airbag is connected to the outer wall of the inner cylinder. A sealed cavity is formed between the airbag, the sealing plate, and the inner cylinder. An air hole is formed at the connection port of the outer cylinder directly opposite to it, which connects its interior to the sealed cavity.

5. The high pressure reactor anti-fouling pretreatment apparatus according to claim 4, characterized in that, It also includes multiple guide members disposed in multiple sealed cavities, the guide members connecting the inner cylinder and the sealing plate to limit the movement of the sealing plate in a direction perpendicular to the opening.

6. The high pressure reactor anti-fouling pretreatment apparatus according to claim 5, characterized in that, The guide includes two telescopic rods and a spring. One end of the two telescopic rods is hinged to the sealing plate, and the other end of the two telescopic rods is slidably hinged to the inner cylinder in the vertical direction. The two telescopic rods are arranged sequentially in the vertical direction, and the distance between them gradually increases in the direction away from the sealing plate. The two ends of the spring are fixedly connected to the two telescopic rods respectively, and the spring is always in a tensioned state.

7. The anti-scaling pretreatment device for high-pressure reactors according to claim 6, characterized in that, Each of the sealed cavities has multiple guide elements, which are arranged sequentially in a vertical direction.

8. The high pressure reactor anti-fouling pretreatment apparatus of claim 1, wherein, The sealing plate is an arc-shaped plate, and a sealing ring is provided on the side of it near the outer cylinder.

9. The high pressure reactor anti-fouling pretreatment apparatus of claim 1, wherein, The top of the inner cylinder extends outside the reactor and is connected to the output end of the reactor's drive unit, which drives the inner cylinder to rotate.

10. The high pressure reactor anti-fouling pretreatment apparatus of claim 9, wherein, The portion of the inner cylinder located outside the reactor is equipped with an air nozzle, and multiple stirring rods are fixedly connected to the outer wall of the outer cylinder.

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