Detachable coil pipe reactor

Abstract

This invention provides a reactor with a detachable coil, specifically relating to the field of reactor technology, to solve a technical problem. The device includes a reactor body and a detachable feeding coil system. The inner wall of the reactor body is provided with a positioning guide structure for positioning the detachable feeding coil system. The detachable feeding coil system is composed of multiple coil modules assembled to form an annular structure adapted to the inner cavity of the reactor body. The coil modules are detachably connected to the positioning guide structure, and adjacent coil modules are connected via detachable interfaces. Spray holes for spraying lithium-containing solutions or precipitants are provided on the pipe walls of the coil modules. This device solves the problems of difficult disassembly of the feeding coil in traditional lithium deposition reactors and the ease with which the equipment is damaged by corrosion or scaling. Through modular design, quick-release structure, and corrosion-resistant optimization, it achieves rapid disassembly and assembly of the coil and efficient maintenance.

Description

Technical Field

[0001] This utility model relates to the field of reaction vessel technology, and more specifically, to a reaction vessel with a detachable coil. Background Technology

[0002] The primary lithium precipitation reactor is a key reaction device used for lithium-ion precipitation in the lithium salt production process. It typically contains a feeding coil (also called a feeder) to evenly distribute the reactants and promote the crystallization process. The feeding coil is usually a ring-shaped metal pipe installed inside the reaction chamber of the lithium precipitation reactor. Small holes are densely distributed at the bottom of the pipe for evenly spraying the lithium-containing solution or precipitant. Its core function is to prevent excessively high local concentrations or wall adhesion, thereby improving precipitation efficiency and crystal quality.

[0003] The feeding coil is usually fixed to the inner wall of the reactor by welding or bolting. However, since the lithium deposition reactor is in a high-temperature, high-pressure and highly corrosive environment for a long time, the pipe may become stuck due to corrosion or scaling. Forcibly disassembling it can easily damage the equipment. Secondly, disassembly requires stopping the machine, cooling, and emptying the material, and requires special tools, which takes a long time. If the operation is not done properly, it may damage the orifice or sealing structure, affecting the uniformity of subsequent feeding. Utility Model Content

[0004] The purpose of this utility model is to provide a reactor with a detachable coil, which mainly solves the problems of difficult disassembly of the feeding coil in traditional lithium precipitation reactors and easy damage to the equipment due to corrosion or scaling. Through modular design, quick-disassembly structure and corrosion resistance optimization, the coil can be quickly disassembled and efficiently maintained.

[0005] The embodiments of this utility model are achieved through the following technical solutions: A reactor with a detachable coil includes a reactor body and a detachable material distribution coil system. The inner wall of the reactor body is provided with a positioning guide structure for positioning the detachable material distribution coil system. The detachable fabric coil system is composed of multiple coil modules assembled to form a ring structure that fits the inner cavity of the reactor body. The coil module is detachably connected to the positioning guide structure, and adjacent coil modules are connected through a detachable interface. The pipe wall of the coil module is provided with spray holes for spraying lithium-containing solutions or precipitants.

[0006] In some embodiments, the positioning and guiding structure includes L-shaped guide grooves spaced circumferentially along the inner wall of the reactor body, and a positioning bracket fixed to the inner wall of the reactor body and corresponding vertically to the L-shaped guide grooves; the bottom of the coil module is adapted to be embedded in the L-shaped guide groove, and the bottom of the module is in contact with the groove wall of the L-shaped guide groove to restrict horizontal displacement; the top of the coil module is detachably fixed to the positioning bracket by a U-shaped clamp, and the U-shaped clamp surrounds the top of the coil module and locks with the positioning bracket to restrict vertical displacement.

[0007] In some embodiments, the detachable interface is a quick-release interface provided at both ends of each coil module. The quick-release interface is coaxially arranged with the pipe of the coil module, and the axes of the quick-release interfaces of two adjacent coil modules coincide after docking. The quick-release interface is made of Hastelloy or titanium alloy, and the outer surface of the quick-release interface is provided with a coating to enhance corrosion resistance.

[0008] In some embodiments, the quick-release interface has a sealing structure at the mating point, the sealing structure including a conical metal sealing ring and a fluororubber O-ring; the two conical metal sealing rings are respectively fixed to the end faces of the two mating quick-release interfaces, and their conical surfaces are in contact with each other; the fluororubber O-ring is embedded in the sealing groove of one of the quick-release interfaces, the sealing groove is arranged around the flow hole of the quick-release interface and located outside the conical metal sealing ring, and the fluororubber O-ring is tightly sealed against the end face of the other quick-release interface after the quick-release interfaces are mated.

[0009] In some embodiments, the pipe of the coil module is a composite pipe, which includes an alloy pipe matrix and a polytetrafluoroethylene (PTFE) layer lining the inner wall of the alloy pipe matrix. The PTFE layer is tightly fitted to the inner wall of the alloy pipe matrix. The spray hole is opened on the lower wall of the pipe and the orifice is inclined towards the center of the reactor body cavity. The edge of the orifice of the spray hole is provided with an outwardly extending guide slope. The guide slope is arranged around the spray hole and smoothly transitions to the outer wall of the pipe.

[0010] In some embodiments, the pipes of the coil module are surface-treated pipes, which are stainless steel pipes with their inner walls electrochemically polished.

[0011] In some embodiments, a thermal compensation structure for compensating for thermal expansion and contraction is further included. The thermal compensation structure includes a bellows compensator and an elastic support block. The bellows compensator is connected in series between the quick-release interface and the pipe of the coil module, with one end sealed to the pipe and the other end sealed to the quick-release interface. The elastic support block is fixed to the bottom of the L-shaped guide groove, with its top abutting against the bottom of the coil module. The elastic support block is also clearance-fitted with the wall of the L-shaped guide groove to allow the coil module to move slightly in the vertical direction.

[0012] In some embodiments, an integrated online cleaning system for cleaning the inside of the coil is also included. The online cleaning system includes a three-way cleaning interface and a cleaning fluid circulation pipeline. The first port of the three-way cleaning interface is sealed to the material inlet end of the coil module, the second port is used to connect to the material conveying pipeline, and the third port is connected to the cleaning fluid supply device through the cleaning fluid circulation pipeline.

[0013] In some embodiments, a coil lifting auxiliary device is further included for assisting in coil disassembly. The lifting auxiliary device includes a lifting ring that surrounds and is fixed to the top outer wall of the reactor body, with its lifting end extending to the position of the coil module within the inner cavity of the reactor body; the top of the coil module is provided with a lifting joint. The technical solution of this utility model embodiment has at least the following advantages and beneficial effects: The coils in this reactor are modularized and have quick-release interfaces, enabling rapid assembly and disassembly and significantly improving maintenance efficiency. Corrosion-resistant materials and surface treatments extend the equipment's service life. Furthermore, thermal compensation and anti-scaling designs reduce the probability of equipment failure and ensure precipitation efficiency and crystal quality. Attached Figure Description

[0014] To more clearly illustrate the technical solutions of the embodiments of this utility model, the drawings used in the embodiments will be briefly introduced below. It should be understood that the following drawings only show some embodiments of this utility model and should not be regarded as a limitation on the scope. For those skilled in the art, other related drawings can be obtained based on these drawings without creative effort.

[0015] Figure 1 This is a schematic diagram of the structure of a reactor with a detachable coil provided in an embodiment of this utility model; Figure 2 for Figure 1 A magnified view of part A in the middle; Figure 3 A bottom view of the coil module provided in an embodiment of this utility model; Figure 4 for Figure 3 A magnified view of part B in the middle.

[0016] Icons: 1. Reactor body; 2. Coil module; 3. Spray hole; 4. L-shaped guide groove; 5. Positioning bracket; 6. U-shaped clamp; 7. Quick-release interface; 8. Conical metal sealing ring; 9. Fluororubber O-ring; 10. Flow guide slope; 11. Corrugated pipe compensator; 12. Elastic support block; 13. T-junction cleaning interface; 14. Cleaning fluid circulation pipeline; 15. Material inlet; 16. Material conveying pipeline; 17. Cleaning fluid supply device; 18. Lifting ring; 19. Lifting joint. Detailed Implementation

[0017] To make the objectives, technical solutions, and advantages of the embodiments of this utility model clearer, the technical solutions of the embodiments of this utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this utility model, and not all embodiments. The components of the embodiments of this utility model described and shown in the accompanying drawings can generally be arranged and designed in various different configurations.

[0018] Therefore, the following detailed description of the embodiments of the present invention provided in the accompanying drawings is not intended to limit the scope of the claimed invention, but merely to illustrate selected embodiments of the invention. All other embodiments obtained by those skilled in the art based on the embodiments of the present invention without inventive effort are within the scope of protection of the present invention.

[0019] It should be noted that similar labels and letters in the following figures indicate similar items. Therefore, once an item is defined in one figure, it does not need to be further defined and explained in subsequent figures.

[0020] In the description of this utility model, it should be noted that if terms such as "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer" appear to indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, or the orientation or positional relationship commonly used when the product is in use, they are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this utility model.

[0021] In the description of this utility model, it should also be noted that, unless otherwise explicitly specified and limited, the terms "set," "install," "connect," and "link" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.

[0022] Please see Figures 1-4 As shown, the main body of this embodiment is a reactor with a detachable coil, including a reactor body 1, which is a cylindrical sealed container. Its inner wall is provided with a positioning guide structure for positioning the detachable coil system. The positioning guide structure includes an L-shaped guide groove 4 and a positioning bracket 5. The L-shaped guide grooves 4 are distributed circumferentially along the inner wall of the reactor body 1. Their cross-section is L-shaped, with the horizontal section facing the center of the reactor body and the vertical section welded and fixed to the inner wall of the reactor body. The L-shaped guide grooves 4 are made of titanium alloy to improve corrosion resistance, and their groove walls are polished to reduce friction.

[0023] The positioning bracket 5 is a plate-shaped structure, which is fixed to the inner wall of the reactor body 1 by welding, and is located vertically above the L-shaped guide groove 4, wherein a positioning bracket 5 is provided directly above each L-shaped guide groove 4.

[0024] Furthermore, the detachable fabric coil system achieves bidirectional positioning in both horizontal and vertical directions by embedding an L-shaped guide groove 4 at the bottom and locking the top with a U-shaped clamp 6 and a positioning bracket 5. The bottom outer contour of the coil module 2 is adapted to the groove shape of the L-shaped guide groove 4. After embedding, the bottom of the coil module 2 fits against the upper surface of the horizontal section and the inner wall of the vertical section of the L-shaped guide groove 4, restricting horizontal displacement. The open end of the U-shaped clamp 6 surrounds the top of the coil module 2, and the closed end is provided with an upward-facing bent plate. The bent plate is locked with the threaded hole of the positioning bracket 5 by bolts, thereby restricting the vertical displacement of the coil module 2.

[0025] Furthermore, the detachable material feeding coil system is composed of multiple coil modules 2 assembled into a ring structure, adapted to the inner diameter of the reactor body 1. Each coil module 2 is an arc-shaped bend, with quick-release interfaces 7 welded to both ends. Adjacent coil modules 2 are joined together via these quick-release interfaces 7 to form a complete ring. The quick-release interfaces 7 are coaxially aligned with the pipes of the coil modules 2, ensuring smooth material flow after connection.

[0026] The quick-release interface 7 is made of Hastelloy C-276 or titanium alloy TC4, and its outer surface is coated with a ceramic coating to enhance corrosion resistance. The quick-release interface 7 includes a connecting end and a mating end integrally formed along its axis; the connecting end is a welded structure used for a sealed connection with the pipe or bellows compensator 11 of the coil module 2; a flange is provided on the outer side of the connecting end for bolting the coil module 2. The end face of the mating end is provided with a conical metal seal mounting position and a sealing groove for a fluororubber O-ring 9. The conical metal seal mounting position is located in the central area of ​​the mating end and surrounds the flow hole, and has an annular positioning groove adapted to the conical metal seal. The sealing groove for the fluororubber O-ring 9 is located radially outside the conical metal seal mounting position and is an annular groove surrounding the metal seal for embedding the fluororubber O-ring 9. The conical metal sealing rings 8 are respectively fixed to the end faces of the two quick-release interfaces 7. After the quick-release interfaces 7 are mated, the conical surfaces fit tightly together, which can resist the erosion of high-pressure media. The fluororubber O-ring 9 is embedded in the sealing groove of the quick-release interface 7. After mating, the O-ring is compressed and abuts against the end face of the other interface, forming a secondary seal to compensate for installation errors.

[0027] The pipes of the coil module 2 are composite pipes, consisting of a 316L stainless steel alloy pipe base and an inner PTFE lining. The PTFE layer is tightly bonded to the inner wall of the alloy pipe base through a molding process, resulting in a smooth inner wall that reduces lithium salt crystal adhesion. Spray holes 3 are located on the lower wall of the pipe and are evenly distributed along the length of the coil module 2. The orifices are inclined towards the center of the reactor body 1 to prevent material from being sprayed directly onto the reactor wall, which could lead to wall slagging. A guide slope 10 is provided at the edge of the orifice, surrounding the spray hole 3 and smoothly transitioning to the outer wall of the pipe to reduce crystal accumulation at the orifice.

[0028] Furthermore, to address thermal expansion and contraction under high-temperature conditions and prevent stress deformation of the coil module 2 or its interface, a thermal compensation structure is installed, including a bellows compensator 11. This compensator is connected in series between the quick-release interface 7 and the pipe of the coil module 2, and is made of the same material as the quick-release interface 7. One end of the compensator is welded to the pipe for a sealed connection, and the other end is flanged to the quick-release interface 7 for a sealed connection. The bellows compensator 11 provides axial displacement compensation and absorbs stress generated by thermal expansion. An elastic support block 12, made of silicon carbide ceramic, is also included. This block is characterized by its high-temperature resistance and corrosion resistance and is fixed to the bottom of the L-shaped guide groove 4. The top of the elastic support block 12 abuts against the bottom of the coil module 2, allowing for slight movement of the coil module 2 and further releasing thermal stress.

[0029] Furthermore, to reduce scaling inside the coil and facilitate subsequent disassembly, an integrated online cleaning system is installed, including a three-way cleaning interface 13 made of corrosion-resistant alloy. Its first port is sealed to the material inlet 15 of the coil module 2, the second port is connected to the material conveying pipeline 16 for normal feeding, and the third port is connected to the cleaning fluid supply device 17, such as a storage tank or pump, via the cleaning fluid flow pipeline 14. Before shutdown, the valve of the material conveying pipeline 16 is closed, and the cleaning fluid supply device 17 is opened. Hot water or dilute acid solution enters the internal channel of the coil module 2 through the three-way cleaning interface 13, flows along the pipeline, and exits from the spray hole 3, flushing away residual lithium salt crystals on the inner wall of the pipeline. The waste liquid after cleaning is discharged from the drain port at the bottom of the reactor.

[0030] Furthermore, to avoid damage to the coil during disassembly by manually dragging it, a coil lifting auxiliary device is provided, including a lifting ring 18, which is welded and fixed to the top outer wall of the reactor body 1. The lifting ring 18 is made of high-strength alloy and can be connected to lifting equipment, such as an electric hoist. The lifting part 19 is an ear plate welded to the top of the coil module 2, with one ear plate for each module section. The ear plate has lifting holes. During disassembly, the hook of the lifting equipment extends into the reactor through the lifting ring 18 and connects to the lifting part 19 of the coil module 2. By slowly lifting, the coil module 2 can be raised vertically along the L-shaped guide groove 4 until it is detached from the inner cavity of the reactor body 1.

[0031] It is worth mentioning that the bolts used for connection in this device are all made of the same material as the quick-release interface 7.

[0032] In some other embodiments, unlike the embodiments described above, the pipes of the coil module 2 are surface-treated pipes, using 316L stainless steel pipes with electrochemically polished inner walls to reduce the probability of crystal deposition.

[0033] The working principle and advantages of this device: Normal operation: The lithium-containing solution or precipitant enters the coil module 2 through the material conveying pipeline 16 and is evenly sprayed into the reactor body 1 through the spraying holes 3 to achieve uniform precipitation of lithium ions; the heat compensation structure absorbs the stress generated by temperature changes to ensure system stability.

[0034] Disassembly and maintenance: First, flush the inside of the coil with the online cleaning system to reduce scale buildup; loosen the connection between the U-shaped clamp 6 and the positioning bracket 5, and disconnect the quick-release interface 7; use the lifting auxiliary device to lift the coil module 2 out for offline cleaning or replacement.

[0035] Key advantages: The coils in this reactor are modularized and feature quick-release interfaces, enabling rapid assembly and disassembly and significantly improving maintenance efficiency; the use of corrosion-resistant materials and surface treatments extends the equipment's service life; and the inclusion of heat compensation and anti-scaling designs reduces the probability of equipment failure and ensures precipitation efficiency and crystal quality.

[0036] The above are merely preferred embodiments of this utility model and are not intended to limit the scope of this utility model. Various modifications and variations can be made to this utility model by those skilled in the art. Any modifications, equivalent substitutions, or improvements made within the spirit and principles of this utility model should be included within the protection scope of this utility model.

Claims

1. A reactor with detachable coils, characterized in that, include: The reactor body (1) and the detachable material feeding coil system are provided with a positioning guide structure for positioning the detachable material feeding coil system on the inner wall of the reactor body (1). The detachable fabric coil system is formed by assembling multiple coil modules (2) to form an annular structure that fits the inner cavity of the reactor body (1). The coil module (2) is detachably connected to the positioning guide structure, and adjacent coil modules (2) are connected through a detachable interface. The pipe wall of the coil module (2) is provided with spray holes (3) for spraying lithium-containing solution or precipitant.

2. The reactor with detachable coils according to claim 1, characterized in that, The positioning and guiding structure includes L-shaped guide grooves (4) spaced circumferentially along the inner wall of the reactor body (1), and a positioning bracket (5) fixed to the inner wall of the reactor body (1) and corresponding vertically to the L-shaped guide grooves (4); the bottom of the coil module (2) is adapted to be embedded in the L-shaped guide groove (4), and the bottom of the module is in contact with the groove wall of the L-shaped guide groove (4) to limit horizontal displacement; the top of the coil module (2) is detachably fixed to the positioning bracket (5) by a U-shaped clamp (6), and the U-shaped clamp (6) surrounds the top of the coil module (2) and locks with the positioning bracket (5) to limit vertical displacement.

3. The reactor with detachable coils according to claim 1 or 2, characterized in that, The detachable interface is a quick-release interface (7) set at both ends of each coil module (2). The quick-release interface (7) is coaxially set with the pipe of the coil module (2), and the quick-release interfaces (7) of two adjacent coil modules (2) are connected and their axes coincide. The quick-release interface (7) is made of Hastelloy or titanium alloy, and the outer surface of the quick-release interface (7) is coated to enhance corrosion resistance.

4. The reactor with detachable coils according to claim 3, characterized in that, The quick-release interface (7) is provided with a sealing structure at the joint. The sealing structure includes a conical metal sealing ring (8) and a fluororubber O-ring (9). The two conical metal sealing rings (8) are respectively fixed on the end faces of the two quick-release interfaces (7) and their conical surfaces fit together. The fluororubber O-ring (9) is embedded in the sealing groove of one of the quick-release interfaces (7). The sealing groove is arranged around the flow hole of the quick-release interface (7) and is located outside the conical metal sealing ring (8). After the quick-release interfaces (7) are joined, the fluororubber O-ring (9) is pressed tightly against the end face of the other quick-release interface (7) for sealing.

5. The reactor with detachable coils according to claim 1, characterized in that, The pipe of the coil module (2) is a composite pipe, which includes an alloy pipe base and a polytetrafluoroethylene layer lining the inner wall of the alloy pipe base. The polytetrafluoroethylene layer is tightly attached to the inner wall of the alloy pipe base. The spray hole (3) is opened on the lower wall of the pipe and the orifice is inclined towards the center of the reactor body (1). The edge of the orifice of the spray hole (3) is provided with an outwardly extending guide slope (10). The guide slope (10) is arranged around the spray hole (3) and smoothly transitions to the outer wall of the pipe.

6. The reactor with detachable coils according to claim 1, characterized in that, The pipe of the coil module (2) is a surface-treated pipe, which is a stainless steel pipe with an inner wall that has been electrochemically polished.

7. The reactor with detachable coils according to claim 1, characterized in that, It also includes a thermal compensation structure for compensating for thermal expansion and contraction, the thermal compensation structure including a bellows compensator (11) and an elastic support block (12); the bellows compensator (11) is connected in series between the quick-release interface (7) and the pipe of the coil module (2), one end of which is sealed to the pipe and the other end is sealed to the quick-release interface (7); the elastic support block (12) is fixed to the bottom of the L-shaped guide groove (4), its top abutting against the bottom of the coil module (2), and the elastic support block (12) and the groove wall of the L-shaped guide groove (4) are fitted with a gap to allow the coil module (2) to move slightly in the vertical direction.

8. The reactor with detachable coils according to claim 1, characterized in that, It also includes an integrated online cleaning system for cleaning the inside of the coil, the online cleaning system including a three-way cleaning interface (13) and a cleaning fluid circulation pipeline (14); the first port of the three-way cleaning interface (13) is sealed to the material inlet (15) of the coil module (2), the second port is used to connect to the material conveying pipeline (16), and the third port is connected to the cleaning fluid supply device (17) through the cleaning fluid circulation pipeline (14).

9. The reactor with detachable coils according to claim 1, characterized in that, It also includes a coil lifting auxiliary device for assisting in the disassembly of the coil, the lifting auxiliary device including a lifting ring (18) fixed around the top outer wall of the reactor body (1), the lifting end of which extends to the position of the inner cavity of the reactor body (1) corresponding to the coil module (2); the top of the coil module (2) is provided with a lifting part (19).

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