Equipment for continuously crystallizing lithium carbonate

Abstract

The invention belongs to the technical field of lithium carbonate crystallization, and particularly relates to lithium carbonate continuous crystallization equipment which comprises an equipment shell, and the equipment shell is composed of a first annular shell, a second annular shell, a third annular shell, a fourth annular shell, a fifth annular shell and a top cover; an outer spiral piece and an inner spiral piece are installed in the equipment shell. A conveying assembly is rotationally mounted in the top cover; the conveying assembly can convey the solution in the fifth cavity into the centrifugal dewatering assembly for dewatering treatment; a power assembly is installed at the upper end of the equipment shell and can control the outer spiral piece, the inner spiral piece and the centrifugal dewatering assembly to work. When a fourth rotating shaft is controlled to rotate through a power assembly, the fourth rotating shaft can drive an inner spiral piece and an outer spiral piece to rotate, and when the concentration of a crystallization liquid does not meet the requirement, the inner spiral piece and the outer spiral piece are controlled to rotate at a constant speed so that the crystallization liquid in a fourth cavity and a sixth cavity can be stirred; and the heating uniformity of the crystallization liquid is ensured.

Description

Technical Field

[0001] The invention belongs to the technical field of lithium carbonate crystallization, and in particular relates to a device for continuous crystallization of lithium carbonate. Background Art

[0002] Lithium carbonate crystallization refers to the process of lithium carbonate precipitating from a solution in the form of crystals. Under certain conditions, when the concentration of lithium carbonate in the solution exceeds its saturation concentration, lithium carbonate will begin to crystallize. The crystallization process is usually affected by factors such as temperature, concentration, and stirring speed.

[0003] The products of lithium carbonate crystals are widely used in the fields of batteries, ceramics, glass, medicine, etc. In lithium-ion batteries, lithium carbonate is an important positive electrode material; in the ceramic and glass industries, lithium carbonate is used as a flux; in the medical field, lithium carbonate is used to treat mental illnesses such as mania.

[0004] The working principle of the commonly used evaporation crystallizer is to heat and evaporate the lithium carbonate solution, so that the water content is continuously reduced and the solution concentration is gradually increased. When the solution reaches the supersaturated state, lithium carbonate crystals are precipitated. Common ones include forced circulation evaporation crystallizer and falling film evaporation crystallizer. This crystallizer can handle high-concentration solutions and has a high crystallization efficiency. However, the energy consumption is relatively large, and care must be taken to prevent scaling and other problems from occurring during the heating process.

[0005] In addition, in order to improve the efficiency of evaporation and crystallization, the evaporation crystallizer often adopts multi-effect evaporation, which will invisibly increase the cost of the equipment. After the crystallization liquid is generated, it is also necessary to dehydrate the crystallization liquid, and a dehydration device is also required.

[0006] The present invention designs a lithium carbonate continuous crystallization device to solve the above problems. Summary of the invention

[0007] Based on this, it is necessary to provide a lithium carbonate continuous crystallization device to address the problems existing in the current lithium carbonate crystallization equipment. By designing the crystallization components of the lithium carbonate raw material and the dehydration components after the crystallization into an integrated unit, the complexity of the equipment structure is reduced while reducing the manufacturing cost of the equipment; that is, the crystallization cost of lithium carbonate is reduced.

[0008] The above purpose is achieved through the following technical solutions: A device for continuous crystallization of lithium carbonate, comprising Equipment shell, the equipment shell is fixedly installed through the bottom support; the equipment shell is composed of a first annular shell, a second annular shell, a third annular shell, a fourth annular shell, a fifth annular shell and a top cover; the second annular shell is fixedly installed on the upper side of the bottom support, the second annular shell is divided into an upper and lower part, the second annular shell of the lower part forms a first cavity through the inner wall surface, the outer wall surface and the bottom surface, and a crystallization outlet is opened at the lower end of the first cavity; the second annular shell of the upper part has no inner wall surface, and a second liquid discharge port is opened on the outer wall surface of its lower end; the third annular shell is fixedly installed on the inner side of the second annular shell, and the outer wall surface of the third annular shell is closely attached to the second annular shell of the upper part, and forms a second cavity with the second annular shell of the upper part, and a centrifugal dehydration component is rotatably installed in the second cavity; The bottom of the third annular shell is provided with a first liquid discharge port, and the third annular shell has no inner wall surface; the fourth annular shell is fixedly installed on the inner side of the third annular shell, and a third cavity is formed between the outer wall surface of the fourth annular shell and the third annular shell, and a raw material adding port is installed at the upper end of the fourth annular shell; the upper end of the outer wall surface of the fourth annular shell extends obliquely inward to form a sixth conical surface, and the upper end of the sixth conical surface extends outward to be fixedly installed with a filter disk, and the outer edge surface of the filter disk extends downward and is fixedly installed with a guide ring, and the guide ring is located at the upper end of the outer wall surface of the third annular shell and is fixedly connected with the upper end of the outer wall surface of the third annular shell without a gap; the top cover is fixedly installed on the upper side of the guide ring through a connecting block, and the wall surface of the lower end of the top cover is located on the upper side of the second annular shell, and there is a raw material adding port between the guide ring and the inner wall surface of the top cover. There is a gap; a fifth annular shell is fixedly installed at the middle position of the fourth annular shell, a fourth cavity is formed between the fifth annular shell and the fourth annular shell, a sixth cavity is inside the fifth annular shell, and a plurality of second one-way valves are evenly installed circumferentially on the outer wall surface of the lower end of the fifth annular shell, and the solution in the fourth cavity can flow into the sixth cavity through the second one-way valve; a second mounting plate is fixedly installed on the upper end of the fifth annular shell, a first air hole and a second air hole are opened on the second mounting plate, a third one-way valve is installed in the first air hole, and the gas in the sixth cavity can be discharged outward through the third one-way valve, but the solution in the sixth cavity cannot be discharged through the third one-way valve; a fourth one-way valve is installed in the second air hole; external gas can enter through the fourth one-way valve The sixth cavity; the first annular shell is fixedly installed on the outer side of the fifth annular shell, the first annular shell is located in the fourth cavity, a fifth cavity is formed between the first annular shell and the fifth annular shell, a plurality of first one-way valves uniformly distributed in the circumferential direction are installed between the first annular shell and the fifth annular shell, the solution in the sixth cavity can flow into the fifth cavity through the first one-way valve, and the upper end of the fifth cavity is an open end; the shell walls of the first annular shell, the fourth annular shell and the fifth annular shell are all installed with heating layers; an outer spiral sheet is rotatably installed in the fourth cavity, and an inner spiral sheet is rotatably installed in the sixth cavity; a conveying assembly is rotatably installed in the top cover; the conveying assembly can convey the solution from the fifth cavity to the centrifugal dehydration assembly for dehydration treatment;A power assembly is installed at the upper end of the equipment shell, and the power assembly can control the operation of the outer spiral sheet, the inner spiral sheet and the centrifugal dehydration assembly. ;

[0009] In one embodiment, the upper end of the guide ring has a fifth conical surface, and the lower end of the guide ring has a seventh conical surface, and an outward pointed protrusion is formed at the intersection of the fifth conical surface and the seventh conical surface. One end of the connecting block is fixedly mounted on the pointed protrusion, and the other end of the connecting block is fixedly connected to the wall surface of the lower end of the top cover.

[0010] In one of the embodiments, a C-shaped liquid pipe is installed on the fourth annular shell, and the upper and lower ends of the liquid pipe are located on the upper and lower sides of the fourth annular shell and communicate with the fourth cavity; a liquid pump and a heat exchange device are installed on the liquid pipe.

[0011] In one embodiment, the centrifugal dehydration component includes a baffle and a conical annular shell, wherein the conical annular shell is rotatably installed in the second cavity; the upper end of the conical annular shell is located on the lower side of the guide ring and the top cover, and the lower end of the conical annular shell is located on the upper side of the first cavity, and the lower end of the conical annular shell is provided with evenly distributed notches; the outer wall surface of the conical annular shell is a conical surface inclined inward at the upper end, and has evenly distributed filtering holes, and a seventh cavity is formed between the outer wall surface of the conical annular shell and the outer wall surface of the upper second annular shell; a plurality of baffles are evenly fixedly installed circumferentially inside the conical annular shell.

[0012] In one of the embodiments, a plurality of vibration components are axially and evenly fixedly installed between the outer wall surface of the conical annular shell and the outer wall surface of the upper second annular shell; a plurality of arc-shaped protrusions are circumferentially and evenly fixedly installed on the inner side of the outer wall surface of the upper second annular shell; the vibration component includes a fifth mounting sleeve and a slide rod, wherein the fifth mounting sleeve is fixedly installed on the outer wall surface of the conical annular shell, and a slide rod is slidably installed in the fifth mounting sleeve, and one end of the slide rod has a curved surface and cooperates with the arc-shaped protrusion installed on the outer wall surface of the upper second annular shell.

[0013] In one embodiment, an air inlet is installed at the upper end of the second annular shell, and the air inlet is connected to an air pump.

[0014] In one embodiment, the first one-way valve includes a third mounting sleeve, a second piston, a second conical surface, a fourth mounting sleeve, a second spring, and a liquid outlet, wherein the third mounting sleeve is fixedly mounted on the fifth annular shell, and the third mounting sleeve is communicated with the sixth cavity; a fourth mounting sleeve is fixedly mounted on the inner side of the third mounting sleeve away from one end of the fifth annular shell, and a liquid outlet is provided between the fourth mounting sleeve and the fifth mounting sleeve; a second conical surface is provided at the connection between the third mounting sleeve and the fifth annular shell, one end of the second piston is a conical surface, the second piston is slidably mounted on the fourth mounting sleeve, and the conical surface on the second piston cooperates with the second conical surface; a second spring is installed between the second piston and the fourth mounting sleeve; the second one-way valve includes a third mounting sleeve, a second piston, a second piston, and a second spring; The valve includes a liquid inlet, a damping rod, a first conical surface, a first piston, a first mounting sleeve, a second mounting sleeve, and a first spring, wherein the first mounting sleeve is fixedly mounted on the fifth annular shell, and the first mounting sleeve is communicated with the sixth cavity; the second mounting sleeve is fixedly mounted on the inner side of the first mounting sleeve close to one end of the fifth annular shell, and a liquid outlet is provided between the second mounting sleeve and the first mounting sleeve; the inner side of the first mounting sleeve away from one end of the fifth annular shell has a first conical surface, one end of the first piston is a conical surface, the first piston is slidably mounted on the second mounting sleeve, and the conical surface on the first piston cooperates with the first conical surface; a first spring and a damping rod are installed between the first piston and the second mounting sleeve, and the first spring is located on the outer side of the damping rod.

[0015] In one embodiment, the third one-way valve comprises a first support, a third spring, a guide rod, a third conical surface, and a third piston, wherein two third conical surfaces symmetrically arranged in the first air hole are opened inside, two first supports are symmetrically installed at the upper and lower ends of the first air hole, one end of the third piston has a conical surface, and the two third pistons are symmetrically slidably installed in the first air hole through two guide rods, and the two third pistons and the two third conical surfaces correspond to each other and cooperate with each other; one end of the guide rod is fixedly installed on the corresponding first support, and the other end of the guide rod is fixedly installed on the corresponding third piston; two third springs are symmetrically installed between the two third pistons and the two first supports, and the elastic strength of the lower third spring is greater than the elastic strength of the upper third spring; the fourth one-way valve comprises a fourth conical surface, a second support, a fourth spring, and a fourth piston, wherein the second air hole has a fourth conical surface opening downward, the second support is fixedly installed on the inner wall of the lower end of the second air hole, the fourth piston is slidably installed in the second air hole, and the fourth piston cooperates with the fourth conical surface; a fourth spring is installed between the fourth piston and the second support.

[0016] In one embodiment, a shaft hole is opened on the second mounting plate, and the fourth shaft is rotatably mounted in the fifth annular shell through the shaft hole, and the inner spiral sheet is fixedly mounted on the fourth shaft; the power assembly includes a motor, a first gear, a second gear, a third gear, a transmission, a fourth gear, a fifth gear, a sixth gear, a first shaft, a seventh gear, a second shaft, an eighth gear, a first mounting plate, a ninth gear, a tenth gear, a fifth shaft, an eleventh gear, a twelfth gear, a sixth shaft, a sealing ring, a fixed support, and a transmission gear ring, wherein the second gear is fixedly mounted on the upper end of the fourth shaft, the motor is fixedly mounted on the upper side of the top cover, the first gear is fixedly mounted on the output shaft of the motor, and the first gear and the second gear are meshed; the transmission is fixedly mounted on the upper side of the top cover, the third gear is fixedly mounted on the input shaft of the transmission, and the third gear and the second gear are meshed; the fourth gear is fixedly mounted on the output shaft of the transmission, the first shaft is rotatably mounted on the upper side of the top cover, the fifth gear is fixedly mounted on the upper side of the first shaft, and the fifth gear is fixedly mounted on the upper side of the first shaft. The gear is meshed with the fourth gear, the sixth gear is fixedly mounted on the lower end of the first rotating shaft, the second rotating shaft is rotatably mounted on the upper side of the top cover through a fixed support, the seventh gear is fixedly mounted on the upper side of the second rotating shaft, and the seventh gear is meshed with the sixth gear; the eighth gear is fixedly mounted on the lower side of the second rotating shaft, the transmission gear ring is fixedly mounted on the upper side of the conical annular shell, and the transmission gear ring is meshed with the eighth gear; the ninth gear is fixedly mounted on the lower end of the fourth rotating shaft, the fifth rotating shaft is rotatably mounted on the lower side of the fourth annular shell, the tenth gear is fixedly mounted on the fifth rotating shaft, and the tenth gear is meshed with the ninth gear; the first mounting disk is rotatably mounted in the fourth cavity, and a sealing ring is installed between the first mounting disk and the fourth cavity; the lower end of the outer spiral sheet is fixedly mounted on the first mounting disk, and the lower end of the first mounting disk is equipped with a first gear ring, the sixth rotating shaft is rotatably mounted on the lower side of the fourth annular shell, the eleventh gear is fixedly mounted on the lower end of the sixth rotating shaft, the eleventh gear is meshed with the tenth gear, the twelfth gear is fixedly mounted on the upper end of the sixth rotating shaft, and the twelfth gear is meshed with the first gear ring.

[0017] In one embodiment, the conveying assembly includes a fixed disk, a thirteenth gear, a spiral conveying sheet, a fourteenth gear, and a seventh rotating shaft, wherein the fixed disk is rotatably installed in the top cover, a second gear ring is installed on the fixed disk, the spiral conveying sheet is fixedly installed on the lower side of the fixed disk and located on the upper side of the fifth cavity, the fourteenth gear is fixedly installed on the fourth rotating shaft, three seventh rotating shafts are circumferentially uniformly rotated installed in the top cover, three thirteenth gears are fixedly installed on the three seventh rotating shafts, the three thirteenth gears are meshed with the fourteenth gear, and the three thirteenth gears are meshed with the second gear ring.

[0018] Compared with the prior art, the advantages of the present invention are: 1. The present invention integrates the crystallization component of the lithium carbonate raw material and the dehydration component after crystallization, thereby reducing the complexity of the equipment structure and the manufacturing cost of the equipment; that is, reducing the crystallization cost of lithium carbonate.

[0019] 2. When the present invention controls the rotation of the fourth shaft through the power component, the fourth shaft will drive the inner spiral blades and the outer spiral blades to rotate. When the concentration of the crystallization liquid does not meet the requirements, controlling the uniform rotation of the inner spiral blades and the outer spiral blades can stir the crystallization liquid in the fourth cavity and the sixth cavity, thereby ensuring the uniformity of the crystallization liquid heating. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 It is a schematic diagram of the overall appearance of the components.

[0021] Figure 2 It is a schematic diagram of the overall component distribution.

[0022] Figure 3 This is a schematic diagram of the overall component distribution.

[0023] Figure 4 It is a schematic diagram of the power component structure.

[0024] Figure 5 It is a schematic diagram of the installation of outer spiral sheets and inner spiral sheets.

[0025] Figure 6 It is a schematic diagram of the conveying component drive.

[0026] Figure 7 It is a schematic diagram of the drive of the centrifugal dehydration component.

[0027] Figure 8 Schematic diagram of the structure of the second one-way valve.

[0028] Fig. 9 Schematic diagram of the structure of the first one-way valve.

[0029] Fig.10 Schematic diagram of the structure of the first pore and the second pore.

[0030] Fig.11 It is a schematic diagram of the vibration component structure.

[0031] Fig.12 is a schematic diagram of the cross section of the device shell.

[0032] Fig.13 It is a schematic diagram of the upper installation of the centrifugal dehydration component.

[0033] Fig.14 It is a schematic diagram of the installation of the lower end of the centrifugal dehydration component.

[0034] Fig.15 It is a schematic diagram of the device shell structure.

[0035] Fig.16 It is a schematic diagram of the structure of the upper end of the equipment shell.

[0036] Fig.17 It is a schematic diagram of the structure at the lower end of the equipment shell.

[0037] Fig.18 It is a schematic diagram of the structure of the centrifugal dehydration component.

[0038] Names of the symbols in the figure: 1. Equipment shell; 2. Power assembly; 3. Raw material addition port; 4. Heat exchange device; 5. Liquid pump; 6. Bottom support; 7. Centrifugal dehydration assembly; 8. External spiral sheet; 9. Internal spiral sheet; 10. Conveying assembly; 12. Vibration assembly; 13. First one-way valve; 14. Second one-way valve; 15. Third one-way valve; 16. Fourth one-way valve; 17. Liquid pipe; 1001, air inlet; 1002, first annular shell; 1004, second mounting plate; 1005, shaft hole; 1006, first support; 1007, third spring; 1008, guide rod; 1009, third cone surface; 1010, first air hole; 1011, third piston; 1014, fourth cone surface; 1015, second support; 1016, fourth spring; 1017, fourth piston; 1018, second air hole; 1019, second annular shell; 1020, first cavity; 1021, third annular shell ; 1022, first liquid discharge port; 1023, fifth annular shell; 1024, filter plate; 1025, top cover; 1026, fifth cone; 1027, guide ring; 1028, fast connection; 1029, sixth cone; 1030, seventh cone; 1032, fourth annular shell; 1034, second liquid discharge port; 1035, crystallization outlet; 1036, second cavity; 1037, third cavity; 1038, fourth cavity; 1039, fifth cavity; 1040, sixth cavity; 1041, seventh cavity; Motor; 2002, first gear; 2003, second gear; 2004, third gear; 2005, transmission; 2006, fourth gear; 2007, fifth gear; 2008, sixth gear; 2009, first rotating shaft; 2010, seventh gear; 2011, second rotating shaft; 2012, eighth gear; 2013, fourth rotating shaft; 2014, first mounting plate; 2015, ninth gear; 2016, tenth gear; 2017, fifth rotating shaft; 2018, eleventh gear; 2019, twelfth gear; 2020, sixth rotating shaft; 2021, sealing ring; 2022, fixed support; 2023, first gear ring; 7001, transmission gear ring; 7002, baffle; 7003, conical annular shell; 7004, notch; 10001, fixed plate; 10002, thirteenth gear; 10003, spiral conveying piece; 10004, fourteenth gear; 10005, seventh rotating shaft; 10006, second gear ring; 1201, fifth mounting sleeve; 1202, sliding rod; 1203, arc surface; 1204, arc-shaped protrusion; 1301, third mounting sleeve; 1302, second piston; 1304, second cone surface; 1305, fourth mounting sleeve; 1306, second spring; 1307, liquid outlet; 1401, liquid inlet; 1402, damping rod; 1403, first cone surface; 1404, first piston; 1405, first mounting sleeve; 1406, second mounting sleeve; 1407, first spring. DETAILED DESCRIPTION

[0039] In order to make the purpose, technical solution and advantages of the present invention more clearly understood, the present invention is further described in detail below through embodiments and in conjunction with the accompanying drawings. It should be understood that the specific embodiments described herein are only used to explain the present invention and are not used to limit the present invention.

[0040] The serial numbers assigned to the components herein, such as "first", "second", etc., are only used to distinguish the objects described and do not have any order or technical meaning. The "connection" and "coupling" mentioned in this application, unless otherwise specified, include direct and indirect connections (couplings). In the description of the present invention, it should be understood that the orientation or position relationship indicated by the terms "upper", "lower", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise", etc. are based on the orientation or position relationship shown in the accompanying drawings, which is only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation to the present invention.

[0041] In the present invention, unless otherwise clearly specified and limited, a first feature being "above" or "below" a second feature may mean that the first and second features are in direct contact, or the first and second features are in indirect contact through an intermediate medium. Moreover, a first feature being "above", "above" or "above" a second feature may mean that the first feature is directly above or obliquely above the second feature, or simply means that the first feature is higher in level than the second feature. A first feature being "below", "below" or "below" a second feature may mean that the first feature is directly below or obliquely below the second feature, or simply means that the first feature is lower in level than the second feature.

[0042] like Figure 1-Figure 18As shown, a lithium carbonate continuous crystallization device comprises a device shell 1, and the device shell 1 is fixedly installed by a bottom support 6; Fig.14 , 15 As shown in FIGS. 16 and 17 , the device shell 1 is composed of a first annular shell 1002, a second annular shell 1019, a third annular shell 1021, a fourth annular shell 1032, a fifth annular shell 1023 and a top cover 1025; Figure 1 , 14 As shown in Figures 15, the second annular shell 1019 is fixedly mounted on the upper side of the bottom support 6. The second annular shell 1019 is divided into an upper and lower part. The lower part of the second annular shell 1019 forms a first cavity 1020 through the inner wall surface, the outer wall surface and the bottom surface. The lower end of the first cavity 1020 is provided with a crystallization outlet 1035; the upper part of the second annular shell 1019 has no inner wall surface, and a second liquid discharge port 1034 is provided on the outer wall surface of the lower end; the third annular shell 1021 is fixedly mounted on the inner side of the second annular shell 1019. The outer wall surface of 1021 is in close contact with the second annular shell 1019 of the upper part, and the second annular shell 1019 of the upper part forms a second cavity 1036, and a centrifugal dehydration component 7 is rotatably installed in the second cavity 1036; the bottom of the third annular shell 1021 is provided with a first drain port 1022, and the third annular shell 1021 has no inner wall surface; the fourth annular shell 1032 is fixedly installed on the inner side of the third annular shell 1021, and a third cavity 1037 is formed between the outer wall surface of the fourth annular shell 1032 and the third annular shell 1021, as shown in FIG. Fig.12 , 13As shown, the upper end of the fourth annular shell 1032 is equipped with a raw material addition port 3; the upper end of the outer wall of the fourth annular shell 1032 extends obliquely inward to form a sixth cone 1029, and the upper end of the sixth cone 1029 extends outward to be fixedly installed with a filter disc 1024, and the outer edge of the filter disc 1024 extends downward to be fixedly installed with a guide ring 1027, and the guide ring 1027 is located at the upper end of the outer wall of the third annular shell 1021 and is fixedly connected to the upper end of the outer wall of the third annular shell 1021 without a gap; the top cover 1025 is fixedly installed on the upper side of the guide ring 1027 through a connecting block, and the lower side of the top cover 1025 The wall surface of the end is located on the upper side of the second annular shell 1019, and there is a gap between the guide ring 1027 and the inner wall surface of the top cover 1025; the fifth annular shell 1023 body is fixedly installed at the middle position of the fourth annular shell 1032, and a fourth cavity 1038 is formed between the fifth annular shell 1023 body and the fourth annular shell 1032 body. The fifth annular shell 1023 is a sixth cavity 1040, and a plurality of second one-way valves 14 are evenly installed on the outer wall surface of the lower end of the fifth annular shell 1023 in a circumferential direction, and the solution in the fourth cavity 1038 can flow into the sixth cavity 1040 through the second one-way valve 14. The upper end of the fifth annular shell 1023 is fixedly mounted with a second mounting plate 1004, and the second mounting plate 1004 is provided with a first air hole 1010 and a second air hole 1018, and a third one-way valve 15 is installed in the first air hole 1010, and the gas in the sixth cavity 1040 can be discharged outward through the third one-way valve 15, but the solution in the sixth cavity 1040 cannot be discharged through the third one-way valve 15; a fourth one-way valve 16 is installed in the second air hole 1018; external gas can enter the sixth cavity 1040 through the fourth one-way valve 16; the outer side of the fifth annular shell 1023 is fixedly mounted with The first annular shell 1002 is located in the fourth cavity 1038, and a fifth cavity 1039 is formed between the first annular shell 1002 and the fifth annular shell 1023. A plurality of first one-way valves 13 uniformly distributed in the circumferential direction are installed between the first annular shell 1002 and the fifth annular shell 1023. The solution in the sixth cavity 1040 can flow into the fifth cavity 1039 through the first one-way valves 13, and the upper end of the fifth cavity 1039 is an open end; the shell walls of the first annular shell 1002, the fourth annular shell 1032 and the fifth annular shell 1023 are all installed with a heating layer; Figure 5 , 6 As shown in , 7, and 17, an outer spiral piece 8 is rotatably installed in the fourth cavity 1038, and an inner spiral piece 9 is rotatably installed in the sixth cavity 1040; a conveying assembly 10 is rotatably installed in the top cover 1025; the conveying assembly 10 can convey the solution from the fifth cavity 1039 to the centrifugal dehydration assembly 7 for dehydration treatment; Figure 1 , 2As shown in Figures 3 and 4, a power assembly 2 is installed at the upper end of the equipment shell 1, and the power assembly 2 can control the operation of the outer spiral blades 8, the inner spiral blades 9 and the centrifugal dehydration assembly 7.

[0043] In the present invention, the crystals after centrifugal filtration by the centrifugal dehydration component 7 will fall into the first cavity 1020, and then the crystals will be discharged from the crystal outlet 1035 and collected.

[0044] In the present invention, the crystal liquid transported to the conveying component 10 will be transported outward by the conveying component 10 to the centrifugal dehydration component 7. During this process, the crystal liquid will pass through the filter disk 1024 at the upper end of the fourth annular shell 1032. The filter disk 1024 is located on the upper side of the third cavity 1037. In the process of the crystal liquid being transported outward by the conveying component 10, the crystal liquid will be filtered by the filter disk 1024. The filtered liquid will flow into the third cavity 1037 through the filter disk 1024, and finally be discharged from the first liquid discharge port 1022.

[0045] The raw material of the present invention can be added into the fourth cavity 1038 through the raw material addition port 3.

[0046] In a further embodiment, Fig.13 As shown, the upper end of the guide ring 1027 has a fifth conical surface 1026, and the lower end of the guide ring 1027 has a seventh conical surface 1030. An outward pointed protrusion is formed at the intersection of the fifth conical surface 1026 and the seventh conical surface 1030. One end of the connecting block is fixedly mounted on the pointed protrusion, and the other end of the connecting block is fixedly connected to the wall surface at the lower end of the top cover 1025.

[0047] In a further embodiment, Figure 2 As shown, a C-shaped liquid pipe 17 is installed on the fourth annular shell 1032 , and the upper and lower ends of the liquid pipe 17 are located on the upper and lower sides of the fourth annular shell 1032 and communicate with the fourth cavity 1038 ; a liquid pump 5 and a heat exchange device 4 are installed on the liquid pipe 17 .

[0048] In the present invention, the crystallization liquid at the bottom of the fourth cavity 1038 can flow upward along the liquid pipe 17 under the action of the liquid pump 5, and flow out from the upper end of the liquid pipe 17 after being heated by the heat exchange device 4. The crystallization liquid in the fourth cavity 1038 can flow through the liquid pump 5, thereby improving the mixing effect of the crystallization liquid and improving the crystallization efficiency. At the same time, during the flow process, the crystallization liquid will pass through the heat exchange device 4 and exchange heat with the heat exchange device 4. The heat exchange device 4 can increase the heating effect of the crystallization liquid and improve the crystallization efficiency.

[0049] In a further embodiment, Figure 7 , 18As shown, the centrifugal dehydration component 7 includes a baffle 7002 and a conical annular shell 7003, wherein the conical annular shell 7003 is rotatably installed in the second cavity 1036; the upper end of the conical annular shell 7003 is located at the lower side of the guide ring 1027 and the top cover 1025, and the lower end of the conical annular shell 7003 is located at the upper side of the first cavity 1020, and the lower end of the conical annular shell 7003 is provided with evenly distributed notches 7004; the outer wall surface of the conical annular shell 7003 is a conical surface inclined inward at the upper end, and has evenly distributed filtering holes, and a seventh cavity 1041 is formed between the outer wall surface of the conical annular shell 7003 and the outer wall surface of the upper second annular shell 1019; a plurality of baffles 7002 are evenly fixedly installed in the circumferential direction of the conical annular shell 7003.

[0050] In the present invention, the crystallization liquid pushed from the first annular shell 1002 to the conveying component 10 will be conveyed by the conveying component 10 to the upper side of the guide ring 1027, and the crystallization liquid conveyed to the upper side of the guide ring 1027 will flow downward from the gap between the guide ring 1027 and the top cover 1025 into the conical annular shell 7003; the crystallization equipment designed by the present invention will control the rotation of the conical annular shell 7003 through the power component 2 during the crystallization process, and the rotation of the conical annular shell 7003 will drive the baffle 7002 to rotate. After the crystallization liquid flows into the conical annular shell 7003, under the action of the baffle 7002, the crystallization liquid will be subjected to the centrifugal action and adhere to the conical surface of the conical annular shell 7003. During the rotation of the conical annular shell 7003, the crystallization liquid will be dehydrated and dried under the centrifugal action; the liquid centrifuged will be discharged from the second liquid discharge port 1034.

[0051] The reason for designing the conical surface of the conical annular shell 7003 is that the conical surface has a longer travel distance for the crystal liquid to slide down along the conical annular shell 7003 under the action of centrifugation than the vertical surface, that is, the centrifugal time is long and the centrifugal effect is relatively good.

[0052] In a further embodiment, Fig.11 As shown, a plurality of vibration components 12 are axially and evenly fixedly installed between the outer wall surface of the conical annular shell 7003 and the outer wall surface of the upper second annular shell 1019; a plurality of arc-shaped protrusions 1204 are circumferentially and evenly fixedly installed on the inner side of the outer wall surface of the upper second annular shell 1019; the vibration component 12 includes a fifth mounting sleeve 1201 and a slide rod 1202, wherein the fifth mounting sleeve 1201 is fixedly installed on the outer wall surface of the conical annular shell 7003, a slide rod 1202 is slidably installed in the fifth mounting sleeve 1201, and one end of the slide rod 1202 has an arc surface 1203 and cooperates with the arc-shaped protrusion 1204 installed on the outer wall surface of the upper second annular shell 1019.

[0053] During the rotation of the conical annular shell 7003, the conical annular shell 7003 will drive the fifth mounting sleeve 1201 to rotate circumferentially, and the rotation of the fifth mounting sleeve 1201 will drive the corresponding sliding rod 1202 to rotate circumferentially; during the rotation, the sliding rod 1202 will slide outward due to the centrifugal force, and when the outer end of the sliding rod 1202 hits the arc-shaped protrusion 1204, the arc-shaped protrusion 1204 will squeeze the sliding rod 1202 so that the sliding rod 1202 slides toward one side of the conical annular shell 7003 and hits the conical annular shell 7003. The conical annular shell 7003 designed by the present invention is an elastic shell, which will vibrate when hit. The vibration can ensure that the crystals attached to the conical surface of the conical annular shell 7003 can slide down smoothly and be collected at last.

[0054] In a further embodiment, Fig.13 As shown, the upper end of the second annular shell 1019 is provided with an air inlet 1001, which is connected to an air pump. The present invention provides an air inlet 1001 at the upper end of the second annular shell 1019, which is connected to an air pump. After use or during use, the air pump can be controlled to blow high-pressure gas into the second annular shell 1019. After the gas enters the second annular shell 1019, the filter holes opened on the conical surface of the conical annular shell 7003 can be cleaned to prevent the filter holes from being blocked and affecting the dehydration and drying of the crystal liquid.

[0055] In a further embodiment, Figure 8 As shown, the first one-way valve 13 includes a third mounting sleeve 1301, a second piston 1302, a second cone 1304, a fourth mounting sleeve 1305, a second spring 1306, and a liquid outlet 1307, wherein the third mounting sleeve 1301 is fixedly mounted on the fifth annular shell 1023, and the third mounting sleeve 1301 is communicated with the sixth cavity 1040; the inner side of the third mounting sleeve 1301 away from one end of the fifth annular shell 1023 is fixedly mounted with a fourth mounting sleeve 1305, and the fourth There is a liquid outlet 1307 between the mounting sleeve 1305 and the fifth mounting sleeve 1201; the connection between the third mounting sleeve 1301 and the fifth annular shell 1023 has a second conical surface 1304, one end of the second piston 1302 is a conical surface, the second piston 1302 is slidably mounted on the fourth mounting sleeve 1305, and the conical surface on the second piston 1302 cooperates with the second conical surface 1304; a second spring 1306 is installed between the second piston 1302 and the fourth mounting sleeve 1305; Fig. 9As shown, the second one-way valve 14 includes a liquid inlet 1401, a damping rod 1402, a first cone 1403, a first piston 1404, a first mounting sleeve 1405, a second mounting sleeve 1406, and a first spring 1407, wherein the first mounting sleeve 1405 is fixedly mounted on the fifth annular shell 1023, and the first mounting sleeve 1405 is communicated with the sixth cavity 1040; the second mounting sleeve 1406 is fixedly mounted on the inner side of the first mounting sleeve 1405 close to one end of the fifth annular shell 1023, and the second mounting sleeve 1406 and the first mounting sleeve 1407 are connected. A liquid outlet 1307 is provided between the mounting sleeves 1405; a first conical surface 1403 is provided on the inner side of the end of the first mounting sleeve 1405 away from the fifth annular shell 1023, one end of the first piston 1404 is a conical surface, the first piston 1404 is slidably mounted on the second mounting sleeve 1406, and the conical surface on the first piston 1404 cooperates with the first conical surface 1403; a first spring 1407 and a damping rod 1402 are installed between the first piston 1404 and the second mounting sleeve 1406, and the first spring 1407 is located on the outer side of the damping rod 1402.

[0056] When the fourth rotating shaft 2013 is controlled to rotate by the power assembly 2, the fourth rotating shaft 2013 will drive the inner spiral piece 9 and the outer spiral piece 8 to rotate. When the concentration of the crystallization liquid does not meet the requirement, controlling the inner spiral piece 9 and the outer spiral piece 8 to rotate at a uniform speed can stir the crystallization liquid in the fourth cavity 1038 and the sixth cavity 1040, thereby ensuring the uniformity of heating the crystallization liquid. During this process, the pressure of the crystallization liquid in the sixth cavity 1040 cannot open the first one-way valve 13; the pressure of the crystallization liquid in the fourth cavity 1038 cannot open the second one-way valve 14; the sixth cavity 1040 and the fourth cavity 1038 are 8 and the fifth cavity 1039 are in an isolated state; when the crystallization liquid concentration in the sixth cavity 1040 reaches the requirement, the inner spiral piece 9 will be controlled to rotate quickly, and the speed of the inner spiral piece 9 rotation can make the speed at which the crystallization liquid in the sixth cavity 1040 is squeezed by the inner spiral piece 9 greater than the flow speed of the crystallization liquid. At this time, the crystallization liquid in the sixth cavity 1040 has a driving force to be pushed downward, and the crystallization liquid pressure at the lower end of the sixth cavity 1040 will increase. When the pressure can make the second one-way valve 14 open, the second one-way valve 14 opens, and the crystallization liquid in the sixth cavity 1040 flows into the fifth cavity 1039, and flows along The crystal liquid in the sixth cavity 1040 flows upwardly through the fifth cavity 1039 and finally flows into the conveying assembly 10. In this process, because the crystal liquid pressure at the lower end of the sixth cavity 1040 is relatively large and greater than the crystal liquid concentration in the fourth cavity 1038, the first one-way valve 13 will not open, and the crystal liquid in the fourth cavity 1038 will not flow into the sixth cavity 1040 to affect the concentration of the crystal liquid in the sixth cavity 1040, and will not affect the crystallization effect of the crystal liquid. When a large amount of crystal liquid in the sixth cavity 1040 is discharged into the fifth cavity 1039, the rotation speed of the inner spiral sheet 9 is slowed down, because the amount of crystal liquid in the sixth cavity 1040 is large at this time. After the reduction and slowing down of the rotation speed of the inner spiral sheet 9 will not exert downward pressure on the crystallization liquid in the sixth cavity 1040, the crystallization liquid pressure in the sixth cavity 1040 will be less than the crystallization liquid pressure in the fourth cavity 1038. At this time, the second one-way valve 14 will open, and the crystallization liquid in the fourth cavity 1038 will flow into the sixth cavity 1040 to replenish the crystallization liquid. A damping rod 1402 is designed in the second one-way valve 14 of the present invention. The function of designing the damping rod 1402 is to slow down the closing speed of the second one-way valve 14 to ensure that the crystallization liquid in the fourth cavity 1038 has enough time to flow into the sixth cavity 1040.

[0057] In a further embodiment, Fig.10As shown, the third one-way valve 15 includes a first support 1006, a third spring 1007, a guide rod 1008, a third cone surface 1009, and a third piston 1011, wherein two third cone surfaces 1009 symmetrically arranged in the first air hole 1010 are opened in the interior of the first air hole 1010, the two first supports 1006 are symmetrically installed at the upper and lower ends of the first air hole 1010, one end of the third piston 1011 has a cone surface, the two third pistons 1011 are symmetrically slidably installed in the first air hole 1010 through two guide rods 1008, the two third pistons 1011 and the two third cone surfaces 1009 correspond to each other one by one and cooperate with each other; one end of the guide rod 1008 is fixedly installed on the corresponding first support 1006, and the other end of the guide rod 1008 is fixedly installed on the corresponding third active Plug 1011; two third springs 1007 are symmetrically installed between the two third pistons 1011 and the two first supports 1006, and the elastic strength of the lower third spring 1007 is greater than the elastic strength of the upper third spring 1007; the fourth one-way valve 16 includes a fourth conical surface 1014, a second support 1015, a fourth spring 1016, and a fourth piston 1017, wherein the second air hole 1018 has a fourth conical surface 1014 opening downward, the second support 1015 is fixedly installed on the inner wall of the lower end of the second air hole 1018, and the fourth piston 1017 is slidably installed in the second air hole 1018 and the fourth piston 1017 and the fourth conical surface 1014 cooperate; a fourth spring 1016 is installed between the fourth piston 1017 and the second support 1015.

[0058] During the process of controlling the rapid rotation of the inner spiral sheet 9, because the crystallization liquid in the sixth cavity 1040 will be transported to the fifth cavity 1039, the sixth cavity 1040 needs to be supplemented with gas to prevent the vacuum phenomenon in the sixth cavity 1040 from affecting the transportation of the crystallization liquid; during the process of controlling the rapid rotation of the inner spiral sheet 9 of the present invention, the fourth one-way valve 16 will open because the pressure in the sixth cavity 1040 becomes smaller, and the third piston 1011 on the upper side of the third one-way valve 15 will close the third one-way valve 15; at this time, the outside gas will enter the sixth cavity 1040 through the fourth one-way valve 16 for gas replenishment; when the crystallization liquid in the fourth cavity 1038 replenishes liquid in the sixth cavity 1040, the pressure in the sixth cavity 1040 will gradually increase, and the fourth one-way valve 16 will When the crystallization liquid contacts the third piston 1011 on the lower side of the third one-way valve 15, the third one-way valve 15 will be closed because the strength of the lower third spring 1007 is greater than that of the upper third spring 1007. During this process, the pressure in the sixth cavity 1040 will not cause the lower third piston 1011 to close. Therefore, the gas squeezed by the addition of crystallization liquid in the sixth cavity 1040 will be discharged from the third one-way valve 15. The function of the third piston 1011 on the lower side of the third one-way valve 15 is to prevent the crystallization liquid from overflowing from the third one-way valve 15 due to excessive addition. When the crystallization liquid contacts the third piston 1011 on the lower side of the third one-way valve 15, because the liquid pressure is greater than the gas pressure, the lower third one-way valve 15 will be squeezed and closed by the crystallization liquid, and the crystallization liquid will not overflow.

[0059] In a further embodiment, a shaft hole 1005 is formed on the second mounting plate 1004, and the fourth shaft 2013 is rotatably mounted in the fifth annular shell 1023 through the shaft hole 1005, and the inner spiral sheet 9 is fixedly mounted on the fourth shaft 2013; Figure 3 , 4, 5, the power assembly 2 includes a motor 2001, a first gear 2002, a second gear 2003, a third gear 2004, a transmission 2005, a fourth gear 2006, a fifth gear 2007, a sixth gear 2008, a first rotating shaft 2009, a seventh gear 2010, a second rotating shaft 2011, an eighth gear 2012, a first mounting plate 2014, a ninth gear 2015, a tenth gear 2016, a fifth rotating shaft 2017, an eleventh gear 2018, a twelfth gear 2019, a sixth rotating shaft 2020, a sealing ring 2021, a fixed support 2022, and a transmission gear ring 7001, wherein the second gear 2003 is fixedly mounted on the upper end of the fourth rotating shaft 2013, and the motor 2001 is provided with a plurality of gears. The motor 2001 is fixedly mounted on the upper side of the top cover 1025, and the first gear 2002 is fixedly mounted on the output shaft of the motor 2001, and the first gear 2002 is meshed with the second gear 2003; the transmission 2005 is fixedly mounted on the upper side of the top cover 1025, and the third gear 2004 is fixedly mounted on the input shaft of the transmission 2005, and the third gear 2004 is meshed with the second gear 2003; the fourth gear 2006 is fixedly mounted on the output shaft of the transmission 2005, the first rotating shaft 2009 is rotatably mounted on the upper side of the top cover 1025, the fifth gear 2007 is fixedly mounted on the upper side of the first rotating shaft 2009, and the fifth gear 2007 is meshed with the fourth gear 2006, and the sixth gear 2008 is fixedly mounted At the lower end of the first rotating shaft 2009, the second rotating shaft 2011 is rotatably mounted on the upper side of the top cover 1025 through the fixed support 2022, the seventh gear 2010 is fixedly mounted on the upper side of the second rotating shaft 2011, and the seventh gear 2010 is meshed with the sixth gear 2008; the eighth gear 2012 is fixedly mounted on the lower side of the second rotating shaft 2011, the transmission gear ring 7001 is fixedly mounted on the upper side of the conical annular shell 7003, and the transmission gear ring 7001 is meshed with the eighth gear 2012; the ninth gear 2015 is fixedly mounted on the lower end of the fourth rotating shaft 2013, the fifth rotating shaft 2017 is rotatably mounted on the lower side of the fourth annular shell 1032, the tenth gear 2016 is fixedly mounted on the fifth rotating shaft 2017, and the tenth gear 2016 is meshed with the Wheel 2016 is meshed with the ninth gear 2015; the first mounting disk 2014 is rotatably mounted in the fourth cavity 1038, and a sealing ring 2021 is installed between the first mounting disk 2014 and the fourth cavity 1038; the lower end of the outer spiral plate 8 is fixedly mounted on the first mounting disk 2014, and the lower end of the first mounting disk 2014 is mounted with a first gear ring 2023, the sixth rotating shaft 2020 is rotatably mounted on the lower side of the fourth annular shell 1032, the eleventh gear 2018 is fixedly mounted on the lower end of the sixth rotating shaft 2020, the eleventh gear 2018 is meshed with the tenth gear 2016, the twelfth gear 2019 is fixedly mounted on the upper end of the sixth rotating shaft 2020, and the twelfth gear 2019 is meshed with the first gear ring 2023.

[0060] When the motor 2001 is working, the motor 2001 can drive the first gear 2002 to rotate. The rotation of the first gear 2002 drives the second gear 2003 to rotate. The rotation of the second gear 2003 drives the fourth rotating shaft 2013 to rotate.

[0061] When the second gear 2003 rotates, the second gear 2003 drives the third gear 2004 to rotate. The rotation of the third gear 2004 is accelerated by the transmission 2005 and drives the fourth gear 2006 to rotate. The rotation of the fourth gear 2006 drives the fifth gear 2007 to rotate. The rotation of the fifth gear 2007 drives the first shaft 2009 to rotate. The rotation of the first shaft 2009 drives the sixth gear 2008 to rotate. The rotation of the sixth gear 2008 drives the seventh gear 2010 to rotate. The rotation of the seventh gear 2010 drives the second shaft 2011 to rotate. The rotation of the second shaft 2011 drives the eighth gear 2012 to rotate. The rotation of the eighth gear 2012 drives the transmission gear ring 7001 to rotate. The rotation of the transmission gear drives the conical annular shell 7003 to rotate. The rotation of the conical annular shell 7003 will produce a centrifugal effect on the crystal liquid flowing into it, and the crystal liquid entering its inner side is subjected to centrifugal dehydration treatment.

[0062] When the fourth rotating shaft 2013 is driven to rotate, the fourth rotating shaft 2013 will drive the inner spiral plate 9 to rotate; at the same time, the rotation of the fourth rotating shaft 2013 will drive the ninth gear 2015 to rotate, the rotation of the ninth gear 2015 will drive the tenth gear 2016 to rotate, the rotation of the tenth gear 2016 will drive the eleventh gear 2018 to rotate, the rotation of the eleventh gear 2018 will drive the twelfth gear 2019 to rotate, the rotation of the twelfth gear 2019 will drive the first gear ring 2023 to rotate, the rotation of the first gear ring 2023 will drive the first mounting disk 2014 to rotate, and the rotation of the first mounting disk 2014 will drive the outer spiral plate 8 to rotate.

[0063] In a further embodiment, Figure 6 , 7 As shown, the conveying assembly 10 includes a fixed disk 10001, a thirteenth gear 10002, a spiral conveying piece 10003, a fourteenth gear 10004, and a seventh rotating shaft 10005, wherein the fixed disk 10001 is rotatably installed in the top cover 1025, a second gear ring 10006 is installed on the fixed disk 10001, the spiral conveying piece 10003 is fixedly installed on the lower side of the fixed disk 10001 and is located on the upper side of the fifth cavity 1039, the fourteenth gear 10004 is fixedly installed on the fourth rotating shaft 2013, three seventh rotating shafts 10005 are circumferentially uniformly rotated and installed in the top cover 1025, three thirteenth gears 10002 are fixedly installed on the three seventh rotating shafts 10005, the three thirteenth gears 10002 are meshed with the fourteenth gear 10004, and the three thirteenth gears 10002 are meshed with the second gear ring 10006.

[0064] In the present invention, when the fourth rotating shaft 2013 is driven to rotate, the fourth rotating shaft 2013 will drive the fourteenth gear 10004 to rotate, the rotation of the fourteenth gear 10004 will drive the three thirteenth gears 10002 to rotate, the rotation of the three thirteenth gears 10002 will drive the second gear ring 10006 to rotate, the rotation of the second gear ring 10006 will drive the fixed disk 10001 to rotate, the rotation of the fixed disk 10001 will drive the spiral conveying piece 10003 to rotate, and the spiral conveying piece 10003 can be transported from the fifth cavity 1039 to the upper side of the guide ring 1027 along the spiral conveying piece 10003 during the rotation process, and the crystal liquid transported to the upper side of the guide ring 1027 will flow downward along the fifth cone surface 1026, and the fifth cone surface 1026 The function is to guide the flow of the crystallization liquid, ensuring that the crystallization liquid can be as close as possible to the conical side of the conical annular shell 7003 in the centrifugal dehydration component 7, and can be centrifuged to the conical surface of the conical annular shell 7003 for dehydration in a relatively short time during the process of the crystallization liquid falling downward. Because the shorter the time for the crystallization liquid to fall from the guide block and be centrifuged to the conical surface of the conical annular shell 7003, the higher its position on the conical annular shell 7003 is, and the distance from the position where it starts to be centrifugally dehydrated to the bottom of the conical annular shell 7003 is greater, and the longer the time it takes to finally slide to the bottom of the conical annular shell 7003 and be collected, the better the centrifugal dehydration effect is; if it falls directly, the contact time between the crystallization liquid and the conical surface of the conical annular shell 7003 is relatively short, and the centrifugal effect is poor.

[0065] The purpose of designing the seventh cone surface 1030 is to ensure smooth installation of the conical annular shell 7003 while preventing the falling crystal liquid from adhering to the guide ring 1027 and affecting the flow of the crystal liquid.

[0066] The technical features of the above embodiments may be arbitrarily combined. To make the description concise, not all possible combinations of the technical features in the above embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0067] The above-described embodiments only express several implementation methods of the present invention, and the description thereof is relatively specific and detailed, but it cannot be understood as limiting the scope of the present invention. It should be pointed out that, for a person of ordinary skill in the art, several modifications and improvements can be made without departing from the concept of the present invention, and these all belong to the protection scope of the present invention. Therefore, the protection scope of the present invention shall be subject to the attached claims.

Claims

1. A device for continuous crystallization of lithium carbonate, characterized in that: It includes The device shell is fixedly installed through the bottom support; the device shell is composed of a first annular shell, a second annular shell, a third annular shell, a fourth annular shell, a fifth annular shell and a top cover; the second annular shell is fixedly installed on the upper side of the bottom support, the second annular shell is divided into an upper and lower part, the second annular shell of the lower part forms a first cavity through the inner wall surface, the outer wall surface and the bottom surface, and a crystallization outlet is opened at the lower end of the first cavity; the second annular shell of the upper part has no inner wall surface, and a second liquid discharge port is opened on the outer wall surface of its lower end; the third annular shell is fixedly installed on the inner side of the second annular shell, and the outer wall surface of the third annular shell is closely attached to the second annular shell of the upper part and the second annular shell of the upper part A second cavity is formed, in which a centrifugal dehydration component is rotatably installed; a first drain port is opened at the bottom of the third annular shell, and the third annular shell has no inner wall surface; a fourth annular shell is fixedly installed on the inner side of the third annular shell, and a third cavity is formed between the outer wall surface of the fourth annular shell and the third annular shell, and a raw material addition port is installed at the upper end of the fourth annular shell; the upper end of the outer wall surface of the fourth annular shell extends obliquely inward to form a sixth conical surface, and the upper end of the sixth conical surface extends outward to fix a filter disk on it, and the outer edge surface of the filter disk extends downward to fix a guide ring on it, and the guide ring is located at the upper end of the outer wall surface of the third annular shell and has no inner wall surface. The gap is fixedly connected; the top cover is fixedly installed on the upper side of the guide ring through a connecting block, the wall surface of the lower end of the top cover is located on the upper side of the second annular shell, and there is a gap between the guide ring and the inner wall surface of the top cover; a fifth annular shell is fixedly installed at the middle position of the fourth annular shell, a fourth cavity is formed between the fifth annular shell and the fourth annular shell, and the fifth annular shell is a sixth cavity, and a plurality of second one-way valves are evenly installed circumferentially on the outer wall surface of the lower end of the fifth annular shell, and the solution in the fourth cavity can flow into the sixth cavity through the second one-way valve; a second mounting disk is fixedly installed on the upper end of the fifth annular shell, and a first air hole and a second air hole are opened on the second mounting disk, and the first and second air holes are opened on the second mounting disk. A third one-way valve is installed in the first air hole, and the gas in the sixth cavity can be discharged outward through the third one-way valve, but the solution in the sixth cavity cannot be discharged through the third one-way valve; a fourth one-way valve is installed in the second air hole; external gas can enter the sixth cavity through the fourth one-way valve; a first annular shell is fixedly installed on the outer side of the fifth annular shell, the first annular shell is located in the fourth cavity, and a fifth cavity is formed between the first annular shell and the fifth annular shell, and a plurality of first one-way valves uniformly distributed in the circumferential direction are installed between the first annular shell and the fifth annular shell, and the solution in the sixth cavity can flow into the fifth cavity through the first one-way valve, and the upper end of the fifth cavity is an open end; A heating layer is installed in the shell walls of the first annular shell, the fourth annular shell and the fifth annular shell; An outer spiral sheet is rotatably installed in the fourth cavity, and an inner spiral sheet is rotatably installed in the sixth cavity; a conveying assembly is rotatably installed in the top cover; the conveying assembly can convey the solution from the fifth cavity to the centrifugal dehydration assembly for dehydration treatment; A power assembly is installed at the upper end of the equipment shell, and the power assembly can control the operation of the outer spiral blade, the inner spiral blade and the centrifugal dehydration assembly.

2. The device for continuous crystallization of lithium carbonate according to claim 1, characterized in that: The upper end of the guide ring has a fifth conical surface, and the lower end of the guide ring has a seventh conical surface. An outward pointed protrusion is formed at the intersection of the fifth conical surface and the seventh conical surface. One end of the connecting block is fixedly installed on the pointed protrusion, and the other end of the connecting block is fixedly connected to the wall surface of the lower end of the top cover.

3. The device for continuous crystallization of lithium carbonate according to claim 1, characterized in that: A C-shaped liquid pipe is installed on the fourth annular shell, and the upper and lower ends of the liquid pipe are located on the upper and lower sides of the fourth annular shell and communicate with the fourth cavity; a liquid pump and a heat exchange device are installed on the liquid pipe.

4. The device for continuous crystallization of lithium carbonate according to claim 1, characterized in that: The centrifugal dehydration component includes a baffle and a conical annular shell, wherein the conical annular shell is rotatably installed in the second cavity; the upper end of the conical annular shell is located on the lower side of the guide ring and the top cover, and the lower end of the conical annular shell is located on the upper side of the first cavity, and the lower end of the conical annular shell is provided with evenly distributed notches; the outer wall surface of the conical annular shell is a conical surface inclined inward at the upper end, and has evenly distributed filtering holes, and a seventh cavity is formed between the outer wall surface of the conical annular shell and the outer wall surface of the upper second annular shell; a plurality of baffles are evenly fixedly installed in the circumferential direction of the conical annular shell.

5. A lithium carbonate continuous crystallization device according to claim 4, characterized in that: A plurality of vibration components are fixedly installed axially and uniformly between the outer wall surface of the conical annular shell and the outer wall surface of the upper second annular shell; A plurality of arc-shaped protrusions are evenly fixedly installed on the inner side of the outer wall surface of the second annular shell of the upper part in the circumferential direction; The vibration component includes a fifth mounting sleeve and a sliding rod, wherein the fifth mounting sleeve is fixedly mounted on the outer wall surface of the conical annular shell, and the sliding rod is slidably mounted in the fifth mounting sleeve, and one end of the sliding rod has an arc surface and cooperates with an arc-shaped protrusion mounted on the outer wall surface of the second annular shell of the upper part.

6. The device for continuous crystallization of lithium carbonate according to claim 1, characterized in that: An air inlet is installed at the upper end of the second annular shell, and the air inlet is connected to the air pump.

7. The device for continuous crystallization of lithium carbonate according to claim 1, characterized in that: The first one-way valve comprises a third mounting sleeve, a second piston, a second conical surface, a fourth mounting sleeve, a second spring, and a liquid outlet, wherein the third mounting sleeve is fixedly mounted on the fifth annular shell, and the third mounting sleeve is communicated with the sixth cavity; a fourth mounting sleeve is fixedly mounted on the inner side of the third mounting sleeve away from one end of the fifth annular shell, and a liquid outlet is provided between the fourth mounting sleeve and the fifth mounting sleeve; a second conical surface is provided at the connection between the third mounting sleeve and the fifth annular shell, one end of the second piston is a conical surface, the second piston is slidably mounted on the fourth mounting sleeve, and the conical surface on the second piston cooperates with the second conical surface; a second spring is installed between the second piston and the fourth mounting sleeve; The second one-way valve includes a liquid inlet, a damping rod, a first conical surface, a first piston, a first mounting sleeve, a second mounting sleeve, and a first spring, wherein the first mounting sleeve is fixedly mounted on the fifth annular shell, and the first mounting sleeve is communicated with the sixth cavity; a second mounting sleeve is fixedly mounted on the inner side of the first mounting sleeve close to one end of the fifth annular shell, and a liquid outlet is provided between the second mounting sleeve and the first mounting sleeve; a first conical surface is provided on the inner side of the first mounting sleeve away from one end of the fifth annular shell, one end of the first piston is a conical surface, the first piston is slidably mounted on the second mounting sleeve, and the conical surface on the first piston cooperates with the first conical surface; a first spring and a damping rod are installed between the first piston and the second mounting sleeve, and the first spring is located on the outer side of the damping rod.

8. The device for continuous crystallization of lithium carbonate according to claim 1, characterized in that: The third one-way valve comprises a first support, a third spring, a guide rod, a third conical surface, and a third piston, wherein two third conical surfaces symmetrically arranged in the upper and lower ends of the first air hole are opened inside the first air hole, two first supports are symmetrically installed at the upper and lower ends of the first air hole, one end of the third piston has a conical surface, and the two third pistons are symmetrically slidably installed in the first air hole through two guide rods, and the two third pistons and the two third conical surfaces correspond to each other one by one and cooperate with each other; one end of the guide rod is fixedly installed on the corresponding first support, and the other end of the guide rod is fixedly installed on the corresponding third piston; two third springs are symmetrically installed between the two first supports of the two third pistons, and the elastic strength of the lower third spring is greater than the elastic strength of the upper third spring; The fourth one-way valve includes a fourth conical surface, a second support, a fourth spring, and a fourth piston, wherein the second air hole has a fourth conical surface opening downward, the second support is fixedly installed on the inner wall of the lower end of the second air hole, the fourth piston is slidably installed in the second air hole and the fourth piston and the fourth conical surface cooperate; a fourth spring is installed between the fourth piston and the second support.

9. The device for continuous crystallization of lithium carbonate according to claim 1, characterized in that: The second mounting plate is provided with a shaft hole, the fourth shaft is rotatably mounted in the fifth annular shell through the shaft hole, and the inner spiral sheet is fixedly mounted on the fourth shaft; The power assembly includes a motor, a first gear, a second gear, a third gear, a transmission, a fourth gear, a fifth gear, a sixth gear, a first rotating shaft, a seventh gear, a second rotating shaft, an eighth gear, a first mounting plate, a ninth gear, a tenth gear, a fifth rotating shaft, an eleventh gear, a twelfth gear, a sixth rotating shaft, a sealing ring, a fixed support, and a transmission gear ring, wherein the second gear is fixedly mounted on the upper end of the fourth rotating shaft, the motor is fixedly mounted on the upper side of the top cover, the first gear is fixedly mounted on the output shaft of the motor, and the first gear and the second gear are meshed; the transmission is fixedly mounted on the upper side of the top cover, the third gear is fixedly mounted on the input shaft of the transmission, and the third gear and the second gear are meshed; the fourth gear is fixedly mounted on the output shaft of the transmission, the first rotating shaft is rotatably mounted on the upper side of the top cover, the fifth gear is fixedly mounted on the upper side of the first rotating shaft, the fifth gear and the fourth gear are meshed, the sixth gear is fixedly mounted on the lower end of the first rotating shaft, and the second rotating shaft The seventh gear is fixedly mounted on the upper side of the top cover through a fixed support and rotation, and the seventh gear is fixedly mounted on the upper side of the second rotating shaft, and the seventh gear is meshed with the sixth gear; the eighth gear is fixedly mounted on the lower side of the second rotating shaft, and the transmission gear ring is fixedly mounted on the upper side of the conical annular shell, and the transmission gear ring is meshed with the eighth gear; the ninth gear is fixedly mounted on the lower end of the fourth rotating shaft, and the fifth rotating shaft is rotationally mounted on the lower side of the fourth annular shell, and the tenth gear is fixedly mounted on the fifth rotating shaft, and the tenth gear is meshed with the ninth gear; the first mounting disk is rotationally mounted in the fourth cavity, and a sealing ring is installed between the first mounting disk and the fourth cavity; the lower end of the outer spiral sheet is fixedly mounted on the first mounting disk, and the lower end of the first mounting disk is equipped with a first gear ring, the sixth rotating shaft is rotationally mounted on the lower side of the fourth annular shell, the eleventh gear is fixedly mounted on the lower end of the sixth rotating shaft, the eleventh gear is meshed with the tenth gear, and the twelfth gear is fixedly mounted on the upper end of the sixth rotating shaft, and the twelfth gear is meshed with the first gear ring.

10. The device for continuous crystallization of lithium carbonate according to claim 9, characterized in that: The conveying assembly includes a fixed disk, a thirteenth gear, a spiral conveying sheet, a fourteenth gear, and a seventh rotating shaft, wherein the fixed disk is rotatably installed in the top cover, a second gear ring is installed on the fixed disk, the spiral conveying sheet is fixedly installed on the lower side of the fixed disk and located on the upper side of the fifth cavity, the fourteenth gear is fixedly installed on the fourth rotating shaft, three seventh rotating shafts are circumferentially uniformly rotated in the top cover, three thirteenth gears are fixedly installed on the three seventh rotating shafts, the three thirteenth gears are meshed with the fourteenth gear, and the three thirteenth gears are meshed with the second gear ring.

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