Lithium hydroxide preparation, separation and crystallization device

Abstract

The utility model relates to the field of lithium hydroxide preparation, in particular to a lithium hydroxide preparation, separation and crystallization device. The utility model provides a lithium hydroxide preparation, separation and crystallization device which can be used for stirring lithium hydroxide slurry, accelerating the separation efficiency of the lithium hydroxide slurry and preventing blockage caused by calcium carbonate filter residues. A lithium hydroxide preparation, separation and crystallization device comprises a supporting frame, a filter, a cover plate, a filter screen and the like, the filter is connected to the upper side of the left portion of the supporting frame, the cover plate is arranged on the upper side of the filter, and the filter screen is clamped in the filter. According to the lithium hydroxide slurry stirring device, the small gear is driven to rotate by rotating the handle, so that the small gear is meshed with the large gear to move, the large gear is driven to slide on the sliding rail, and the connecting shaft rotates to drive the stirrer to rotate on the filter screen, so that lithium hydroxide slurry can be stirred; the lithium hydroxide slurry separation efficiency is improved; and blockage caused by calcium carbonate filter residues is prevented.

Description

Technical Field

[0001] The utility model relates to the field of lithium hydroxide preparation, in particular to a lithium hydroxide preparation separation and crystallization device. Background Art

[0002] A common method for preparing lithium hydroxide is through the lithium salt causticization method. In the lithium salt causticization method, sodium hydroxide (NaOH) is usually used as a causticizing agent to react a lithium salt (such as lithium chloride) with sodium hydroxide to produce lithium hydroxide. In the lithium hydroxide preparation process, the obtained lithium hydroxide slurry needs to be separated and crystallized.

[0003] The existing method for preparing and separating lithium hydroxide crystals is to pour lithium hydroxide slurry into a filter barrel, and then use a filter screen in the filter barrel to separate the causticized calcium carbonate residue and lithium hydroxide mother liquor. However, since the lithium hydroxide slurry flows through the filter screen by gravity, the filtration speed is slow during filtration, and the calcium carbonate residue is easily blocked by the filter screen.

[0004] Therefore, a lithium hydroxide preparation, separation and crystallization device has been developed which can stir the lithium hydroxide slurry, accelerate the separation efficiency of the lithium hydroxide slurry and prevent blockage caused by calcium carbonate filter residue. Utility Model Content

[0005] In order to overcome the shortcomings of the existing lithium hydroxide preparation separation crystallization, in which the lithium hydroxide slurry flows through the filter screen by gravity, the filtration speed is slow during filtration, and the calcium carbonate filter residue easily causes clogging of the filter screen, the utility model provides a lithium hydroxide preparation separation crystallization device which can stir the lithium hydroxide slurry, speed up the separation efficiency of the lithium hydroxide slurry and prevent clogging caused by the calcium carbonate filter residue.

[0006] The technical solution is: a lithium hydroxide preparation, separation and crystallization device, including a support frame, a filter, a cover plate, a filter screen, a transport part, a crystallization barrel, a heating base, a stirring assembly, an air inlet part, an air outlet part and a stirring mechanism. The upper left side of the support frame is connected to the filter, the upper side of the filter is provided with a cover plate, the filter screen is clamped inside the filter, the lower side of the filter is connected to the transport part, the right side of the support frame is connected to the crystallization barrel, the lower side of the crystallization barrel is threadedly connected to the heating base, the crystallization barrel is connected to the stirring assembly, the lower right side of the crystallization barrel is connected to the air inlet part, the upper right side of the crystallization barrel is connected to the air outlet part, and the cover plate is provided with a stirring mechanism capable of stirring lithium hydroxide slurry.

[0007] Furthermore, the stirring assembly includes a motor and a stirring rod. The motor is connected to the upper side of the crystallization barrel, the stirring rod is connected to the motor output shaft, and the stirring rod is rotatably connected to the crystallization barrel.

[0008] Furthermore, a filter plug is included. The filter plug is clamped on the air inlet component. The filter plug filters the inert gas and prevents the lithium hydroxide mother liquor from flowing out.

[0009] Furthermore, the stirring mechanism includes a handle, a small gear, a large gear, a slide rail, a connecting shaft and an agitator. The right part of the cover plate is rotatably connected to the handle, the lower side of the handle is connected to the small gear, the lower side of the cover plate is connected to the slide rail, the slide rail is slidably connected to the large gear, the large gear is meshed with the small gear, a plurality of connecting shafts are connected to the lower side of the large gear, the agitator is connected between the lower sides of the connecting shafts, the agitator is in contact with the filter screen, and the handle is turned to drive the small gear to rotate, so that the small gear meshes with the large gear, driving the large gear to slide on the slide rail, and the connecting shaft rotates to drive the agitator to rotate on the filter screen.

[0010] Furthermore, a gripping piece is provided on the handle.

[0011] Furthermore, it also includes a leak-proof mechanism, which includes a connecting piece, a baffle, a torsion spring and a fixed shaft. The right side of the air inlet piece is connected to a connecting piece, the connecting piece is connected to a fixed shaft, the fixed shaft is rotatably connected to a baffle, the baffle is in contact with the connecting piece, and a torsion spring is connected between the baffle and the fixed shaft. When the inert gas stops flowing, the torsion spring recovers, driving the baffle to return to contact with the connecting piece.

[0012] The beneficial effects are as follows: 1. The utility model drives the small gear to rotate by turning the handle, so that the small gear and the large gear mesh and move, driving the large gear to slide on the slide rail, so that the connecting shaft rotates and drives the agitator to rotate on the filter screen, thereby achieving the effect of stirring the lithium hydroxide slurry, accelerating the separation efficiency of the lithium hydroxide slurry and preventing blockage caused by calcium carbonate filter residue.

[0013] 2. The utility model uses inert gas to push the baffle to rotate on the fixed axis, causing the torsion spring to deform. When the inert gas stops flowing in, the torsion spring recovers, driving the baffle to return to contact with the connecting piece, thereby achieving the effect of sealing the air inlet and preventing the inert gas in the crystallization barrel from flowing back and leaking. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 It is a three-dimensional structural schematic diagram of the utility model.

[0015] Figure 2 It is a structural schematic diagram of the utility model.

[0016] Figure 3 It is a schematic diagram of the three-dimensional structure of the stirring mechanism of the utility model.

[0017] Figure 4 It is a three-dimensional structural schematic diagram of the utility model.

[0018] Figure 5 It is a three-dimensional structural schematic diagram of the leakage prevention mechanism of the utility model.

[0019] The names and serial numbers of the parts in the figure are: 1_support frame, 2_filter, 20_cover, 3_filter screen, 4_transport part, 5_crystallization barrel, 6_heating base, 7_stirring assembly, 8_air inlet part, 80_filter plug, 9_air outlet part, 10_stirring mechanism, 101_handle, 102_small gear, 103_large gear, 104_slide rail, 105_connecting shaft, 106_stirrer, 11_leakage prevention mechanism, 111_connecting part, 112_baffle, 113_torsion spring, 114_fixed shaft. DETAILED DESCRIPTION

[0020] The technical solution of the utility model is further described below in conjunction with the accompanying drawings.

[0021] A lithium hydroxide preparation separation crystallization device, such as Figure 1 , Figure 2 and Figure 4 As shown, it includes a support frame 1, a filter 2, a cover plate 20, a filter screen 3, a transport member 4, a crystallization barrel 5, a heating base 6, a stirring assembly 7, an air inlet member 8, a filter plug 80, an air outlet member 9 and a stirring mechanism 10. The upper left side of the support frame 1 is connected to the filter 2, the upper side of the filter 2 is provided with a cover plate 20, the filter screen 3 is clamped inside the filter 2, the lower side of the filter 2 is connected to the transport member 4, the right portion of the support frame 1 is connected to the crystallization barrel 5, the lower side of the crystallization barrel 5 is threadedly connected to the heating base 6, the crystallization barrel 5 is connected to the stirring assembly 7, the stirring assembly 7 includes a motor and a stirring rod, the upper side of the crystallization barrel 5 is connected to the motor, the motor output shaft is connected to the stirring rod, the stirring rod is rotatably connected to the crystallization barrel 5, the lower right side of the crystallization barrel 5 is connected to the air inlet member 8, the filter plug 80 is clamped on the air inlet member 8, the upper right side of the crystallization barrel 5 is connected to the air outlet member 9, and the cover plate 20 is provided with a stirring mechanism 10.

[0022] like Figure 1-Figure 3 As shown, the stirring mechanism 10 includes a handle 101, a pinion 102, a large gear 103, a slide rail 104, a connecting shaft 105 and an agitator 106. The right part of the cover 20 is rotatably connected to the handle 101, and a gripping piece is provided on the handle 101 for easy gripping. The lower side of the handle 101 is connected to the pinion 102, and the lower side of the cover 20 is connected to the slide rail 104. The slide rail 104 is slidably connected to the large gear 103, and the large gear 103 is meshed with the pinion 102. A plurality of connecting shafts 105 are connected to the lower side of the large gear 103, and the agitator 106 is connected between the lower sides of the connecting shafts 105, and the agitator 106 is in contact with the filter 3.

[0023] When using the utility model, firstly, the support frame 1 is placed in the lithium hydroxide preparation area, and then the lithium hydroxide slurry is poured into the filter 2 through the cover plate 20, and the filter screen 3 is used to filter the lithium hydroxide slurry to obtain the causticized calcium carbonate filter residue and the lithium hydroxide mother liquor. The lithium hydroxide mother liquor flows into the crystallization barrel 5 through the transport part 4, and then the heating base 6 is used to heat the lithium hydroxide mother liquor to evaporate, crystallize and dry the lithium hydroxide mother liquor to obtain the lithium hydroxide product. When the lithium hydroxide mother liquor is dry, dry inert gas can be transported into the crystallization barrel 5 through the air inlet part 8, and the filter plug 80 filters the inert gas. And prevent the lithium hydroxide mother liquor from flowing out, so that the gas in the crystallization barrel 5 is discharged from the gas outlet 9 to ensure the purity of the lithium hydroxide product. After the lithium hydroxide slurry is poured into the filter 2 through the cover plate 20, the handle 101 can be turned to drive the small gear 102 to rotate, so that the small gear 102 and the large gear 103 are meshed and move, driving the large gear 103 to slide on the slide rail 104, so that the connecting shaft 105 rotates and drives the agitator 106 to rotate on the filter 3, thereby playing a role in stirring the lithium hydroxide slurry, accelerating the separation efficiency of the lithium hydroxide slurry and preventing the calcium carbonate filter residue from causing blockage.

[0024] like Figure 1 , Figure 2 , Figure 4 and Figure 5 As shown, it also includes a leak-proof mechanism 11, which includes a connecting member 111, a baffle 112, a torsion spring 113 and a fixed shaft 114. The connecting member 111 is connected to the right side of the air inlet member 8, and the connecting member 111 is connected to the fixed shaft 114. The baffle 112 is rotatably connected to the fixed shaft 114, and the baffle 112 is in contact with the connecting member 111. A torsion spring 113 is connected between the baffle 112 and the fixed shaft 114.

[0025] The anti-leakage mechanism 11 of the device can prevent the leakage of inert gas. The connecting piece 111 is connected to the air inlet piece 8. When the inert gas is introduced into the air inlet piece 8, the inert gas pushes the baffle 112 to rotate on the fixed shaft 114, and the torsion spring 113 is deformed. When the inert gas stops entering, the torsion spring 113 recovers, driving the baffle 112 to return to contact with the connecting piece 111, thereby closing the air inlet piece 8 and preventing the inert gas in the crystallization barrel 5 from reflux and leakage.

[0026] The above is only a preferred embodiment of the present invention. It should be pointed out that for ordinary technicians in this technical field, several improvements and modifications can be made without departing from the principle of the present invention. These improvements and modifications should also be regarded as the protection scope of the present invention.

Claims

1. A lithium hydroxide preparation separation crystallization device, characterized in that: The invention comprises a support frame (1), a filter (2), a cover plate (20), a filter screen (3), a transport member (4), a crystallization barrel (5), a heating base (6), a stirring assembly (7), an air inlet member (8), an air outlet member (9) and a stirring mechanism (10). The upper left side of the support frame (1) is connected to the filter (2), the upper side of the filter (2) is provided with a cover plate (20), the filter screen (3) is clamped inside the filter (2), the lower side of the filter (2) is connected to the transport member (4), the right side of the support frame (1) is connected to the crystallization barrel (5), the lower side of the crystallization barrel (5) is threadedly connected to the heating base (6), the crystallization barrel (5) is connected to the stirring assembly (7), the lower right side of the crystallization barrel (5) is connected to the air inlet member (8), the upper right side of the crystallization barrel (5) is connected to the air outlet member (9), and the cover plate (20) is provided with a stirring mechanism (10) capable of stirring lithium hydroxide slurry.

2. A lithium hydroxide preparation separation crystallization device according to claim 1, characterized in that, The stirring assembly (7) comprises a motor and a stirring rod. The upper side of the crystallization barrel (5) is connected to the motor. The motor output shaft is connected to the stirring rod. The stirring rod is rotatably connected to the crystallization barrel (5).

3. A lithium hydroxide preparation separation crystallization device according to claim 1, characterized in that, The invention also comprises a filter plug (80), which is clamped on the air inlet member (8) and filters the inert gas and prevents the lithium hydroxide mother liquor from flowing out.

4. A lithium hydroxide preparation separation crystallization device according to claim 1, characterized in that, The stirring mechanism (10) comprises a handle (101), a pinion (102), a large gear (103), a slide rail (104), a connecting shaft (105) and a stirrer (106). The right part of the cover plate (20) is rotatably connected to the handle (101), the lower side of the handle (101) is connected to the pinion (102), the lower side of the cover plate (20) is connected to the slide rail (104), the slide rail (104) is slidably connected to the large gear (103), and the large gear (103) is meshed with the pinion (102). Four connecting shafts (105) are connected to the lower side of the large gear (103), and a stirrer (106) is connected between the lower sides of the connecting shafts (105). The stirrer (106) is in contact with the filter screen (3). The handle (101) is turned to drive the small gear (102) to rotate, so that the small gear (102) and the large gear (103) mesh and move, driving the large gear (103) to slide on the slide rail (104), so that the connecting shaft (105) rotates and drives the stirrer (106) to rotate on the filter screen (3).

5. A lithium hydroxide preparation separation crystallization device according to claim 4, characterized in that, The handle (101) is provided with a gripping piece.

6. A lithium hydroxide preparation separation crystallization device according to claim 4, characterized in that, The invention also comprises a leak prevention mechanism (11), the leak prevention mechanism (11) comprising a connecting member (111), a baffle (112), a torsion spring (113) and a fixed shaft (114); the right side of the air inlet member (8) is connected to the connecting member (111); the fixed shaft (114) is connected to the connecting member (111); the fixed shaft (114) is rotatably connected to the baffle (112); the baffle (112) is in contact with the connecting member (111); a torsion spring (113) is connected between the baffle (112) and the fixed shaft (114); when the inert gas stops being introduced, the torsion spring (113) is restored, driving the baffle (112) to return to contact with the connecting member (111).

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