A filtering and drying device for alkali metal salts

Abstract

The utility model provides a filtering and drying device for alkali metal salts, including a cylinder, an air supply chamber and an exhaust pipe, a filter screen is arranged inside the cylinder, the filter screen divides the cylinder into a filtering chamber and a drying chamber, a feed pipe is arranged at the top of the cylinder, a discharge pipe is arranged at the bottom, a filter cylinder is rotatably connected in the filtering chamber, the feed pipe extends downward into the filtering cylinder, and a plurality of fixed blades located in the filtering cylinder are arranged on the outer peripheral wall of the feed pipe; the air supply chamber is arranged at the side of the cylinder and communicated with the drying chamber, and is used to supply hot air to the drying chamber; the exhaust pipe is communicated with the drying chamber and is located above the discharge pipe, and is used to discharge water vapor in the drying chamber. The filtering and drying device for alkali metal salts provided by the utility model not only improves the filtering speed of the material, but also effectively ensures the filtering accuracy, avoids the waste of materials caused by insufficient filtering, and is convenient for improving the quality of subsequent products.

Description

Technical Field

[0001] The utility model belongs to the technical field of alkali metal salt preparation, and in particular relates to a filtering and drying device for alkali metal salt. Background Art

[0002] Alkali metal salts such as potassium bis(fluorosulfonyl imide), lithium bis(fluorosulfonyl imide, and silver bis(fluorosulfonyl imide) are often used to prepare various inorganic compounds containing bis(fluorosulfonyl imide) ions, and are also widely used to prepare various organic ionic liquids containing bis(fluorosulfonyl imide) ions. Most alkali metal salt crystals are ionic crystals with high melting and boiling points. In the processing of alkali metal salts, it is necessary to filter and dry the alkali metal salt crystal particles, which requires the use of alkali metal salt filtering and drying equipment.

[0003] Most of the existing alkali metal salt filtering and drying equipment filters the raw materials from top to bottom through a filter screen horizontally arranged at the bottom of the box. This filtering method is relatively slow, which affects the efficiency of batch production. At the same time, some alkali metal salt crystals are prone to deliquesce and agglomerate, which in turn affects the filtering accuracy, resulting in insufficient filtration and waste of raw materials. Utility Model Content

[0004] The embodiment of the utility model provides a filtering and drying device for alkali metal salts, which can improve the filtering speed of materials, effectively ensure the filtering accuracy, and avoid the waste of materials caused by insufficient filtering.

[0005] To achieve the above-mentioned purpose, the technical solution adopted by the utility model is: to provide an alkali metal salt filtering and drying equipment, including a cylinder, an air supply chamber and an exhaust pipe, a filter screen is arranged inside the cylinder, the filter screen divides the cylinder into a filter chamber and a drying chamber located below the filter chamber, a feed pipe is arranged on the top of the cylinder, and a discharge pipe is arranged on the bottom, a filter cartridge is rotatably connected in the filter chamber, the feed pipe extends downward into the filter cartridge, and a plurality of fixed blades located in the filter cartridge are arranged on the outer peripheral wall of the feed pipe; the air supply chamber is arranged on the side of the cylinder and is connected to the drying chamber for supplying hot air into the drying chamber; the exhaust pipe is connected to the drying chamber and is located above the discharge pipe for discharging water vapor in the drying chamber.

[0006] As another embodiment of the utility model, a cover body is provided above the filter cartridge, a feed pipe is arranged through the cover body and is fixedly connected to the cover body, the cover body has a downward opening, and a plurality of balls are embedded on the inner circumferential wall of the cover body and roll with the outer circumferential wall of the filter cartridge.

[0007] As another embodiment of the utility model, a conical ring plate is provided inside the cylinder and is located below the filter cylinder. The outer edge of the conical ring plate is connected to the inner wall of the cylinder, and the outer edge of the filter screen is connected to the inner edge of the conical ring plate.

[0008] As another embodiment of the utility model, an upper support plate located below the filter screen and a lower support plate located below the upper support plate are provided inside the cylinder, a drying chamber is located between the upper support plate and the lower support plate, heating wires are provided on the side of the upper support plate and the lower support plate facing away from the drying chamber, a discharge port corresponding to the upper and lower parts of the filter screen is provided on the upper support plate, and the lower support plate gradually tilts downward from the side away from the discharge pipe to the side close to the discharge pipe, and is used to guide the dried material into the discharge pipe.

[0009] As another embodiment of the utility model, a driving member is connected to the bottom of the cylinder, and the driving member is connected to a rotating shaft extending upward. The rotating shaft passes through the lower support plate, the upper support plate and the filter screen from bottom to top, and the upper end of the rotating shaft is connected to the bottom wall of the filter cylinder.

[0010] As another embodiment of the utility model, the outer periphery of the rotating shaft is connected with a guide cone plate which tapers upwards. The guide cone plate is located in the drying chamber and is arranged correspondingly to the discharge port above and below.

[0011] As another embodiment of the utility model, the outer periphery of the rotating shaft is connected with a stirring blade, and the stirring blade is located between the guide cone plate and the lower support plate.

[0012] As another embodiment of the utility model, an air inlet communicating with the outside is provided on the side of the air supply chamber away from the cylinder, and an air blower and a heating pipe are provided in the air supply chamber, and the air blower is located between the air inlet and the heating pipe.

[0013] As another embodiment of the utility model, a moisture absorbing filter plate is provided between the air inlet and the air blower.

[0014] As another embodiment of the utility model, a filter cover is provided at the air inlet end of the exhaust pipe, and the filter cover is connected to the inner wall of the drying chamber.

[0015] The beneficial effect of the alkali metal salt filtering and drying equipment provided by the utility model is that: compared with the prior art, in the alkali metal salt filtering and drying equipment of the utility model, the alkali metal salt crystal material enters the filter cylinder from the feed pipe, and the rotation of the filter cylinder generates centrifugal force so that the material can be filtered outward from the bottom and the surrounding side of the filter cylinder at the same time; at the same time, with the rotation of the filter cylinder, the fixed blade located on the outer wall of the feed pipe can stir the material in the filter cylinder and break up the agglomerated material, which greatly improves the filtering efficiency of the material; the material filtered by the filter cylinder passes through the filter net downward for secondary filtration and enters the drying chamber, and hot air is blown into the drying chamber through the air supply chamber to make the moisture in the material evaporate by heat and discharged through the exhaust pipe, and the obtained dried material is sent to the subsequent process through the discharge pipe. The above structure not only improves the filtering speed of the material, but also effectively guarantees the filtering accuracy, avoids the waste of material caused by insufficient filtering, and is convenient for improving the quality of subsequent products. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative labor.

[0017] Figure 1 A schematic diagram of the structure of an alkali metal salt filtering and drying device provided in an embodiment of the utility model;

[0018] Figure 2 For the utility model embodiment Figure 1 A schematic diagram of the enlarged structure of the middle part A;

[0019] Figure 3 A schematic structural diagram of a feed pipe provided in an embodiment of the utility model.

[0020] Among them, the reference numerals in the figure are:

[0021] 1. Cylinder; 11. Feed pipe; 111. Fixed blade; 112. Feed opening; 12. Discharge pipe; 13. Filter cylinder; 14. Cover; 15. Ball; 16. Conical ring plate; 17. Upper support plate; 171. Discharge port; 18. Lower support plate; 19. Heating wire; 2. Filter screen; 3. Filter chamber; 4. Drying chamber; 5. Air supply chamber; 51. Air inlet; 52. Air blower; 53. Heating pipe; 54. Moisture absorption filter plate; 6. Exhaust pipe; 61. Filter cover; 7. Driving member; 71. Rotating shaft; 72. Guide cone plate; 73. Stirring blade. DETAILED DESCRIPTION

[0022] In order to make the technical problems, technical solutions and beneficial effects to be solved by the present invention more clearly understood, the present invention is further described in detail below in conjunction with the accompanying drawings and embodiments. 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.

[0023] It should be noted that when an element is referred to as being "disposed on" another element, it may be directly on another element or indirectly on another element. It should be understood that the orientation or positional relationship indicated by the terms "length", "width", "upper", "lower", "front", "back", "top", "bottom", "inside", "outside", etc. is based on the orientation or positional 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 of the present invention. The terms "first" and "second" are only used for descriptive purposes and cannot be understood as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, the features defined as "first" and "second" may explicitly or implicitly include one or more of the features. In the description of the present invention, the meanings of "multiple" and "several" are two or more, unless otherwise clearly and specifically defined.

[0024] Please also read Figure 1 and Figure 3 , now the filtering and drying equipment of alkali metal salt provided by the utility model is described. The filtering and drying equipment of alkali metal salt comprises a cylinder 1, an air supply chamber 5 and an exhaust pipe 6. A filter screen 2 is arranged inside the cylinder 1, and the filter screen 2 divides the cylinder 1 into a filter chamber 3 and a drying chamber 4 located below the filter chamber 3. A feed pipe 11 is arranged at the top of the cylinder 1, and a discharge pipe 12 is arranged at the bottom. A filter cartridge 13 is rotatably connected in the filter chamber 3. The feed pipe 11 extends downward into the filter cartridge 13, and a plurality of fixed blades 111 located in the filter cartridge 13 are arranged on the outer peripheral wall of the feed pipe 11; the air supply chamber 5 is arranged at the side of the cylinder 1 and communicated with the drying chamber 4, and is used to supply hot air to the drying chamber 4; the exhaust pipe 6 is communicated with the drying chamber 4 and is located above the discharge pipe 12, and is used to discharge water vapor in the drying chamber 4.

[0025] Compared with the prior art, the alkali metal salt filtering and drying equipment provided in this embodiment is that the alkali metal salt crystal material enters the filter cylinder 13 from the feed pipe 11, and the rotation of the filter cylinder 13 generates centrifugal force so that the material can be filtered outward from the bottom and the surrounding side of the filter cylinder 13 at the same time; at the same time, as the filter cylinder 13 rotates, the fixed blade 111 located on the outer wall of the feed pipe 11 can stir the material in the filter cylinder 13 and break up the agglomerated material, which greatly improves the filtering efficiency of the material; the material filtered by the filter cylinder 13 passes through the filter screen 2 downward for secondary filtration and enters the drying chamber 4, and hot air is blown into the drying chamber 4 through the air supply chamber 5 to evaporate the moisture in the material and discharge it through the exhaust pipe 6, and the obtained dried material is sent to the subsequent process through the discharge pipe 12. The above structure not only improves the filtering speed of the material, but also effectively ensures the filtering accuracy, avoids the waste of material caused by insufficient filtering, and is convenient for improving the quality of subsequent products.

[0026] In this embodiment, a conical funnel is provided at the top of the feed pipe 11 to facilitate the input of materials into the feed pipe 11; a plurality of feed openings 112 are provided on the outer peripheral wall of the feed pipe 11 to allow materials to simultaneously enter the filter cartridge 13 through the bottom opening of the feed pipe 11 and the plurality of feed openings 112, thereby preventing materials from accumulating in the feed pipe 11 and affecting the filtration speed.

[0027] The feed pipe 11 is welded and fixed on the cylinder body 1, and the fixed blade 111 is fixed and welded on the outer peripheral wall of the feed pipe 11. Therefore, when the filter cylinder 13 rotates, a relative rotation is formed between the fixed blade 111 and the filter cylinder 13, so that the fixed blade 111 can shear and break up the material in the filter cylinder 13, break up the damp and agglomerated alkali metal salt crystal particles, and facilitate the subsequent filtering process.

[0028] The rotating setting of the filter cylinder 13 can generate centrifugal force, so that the material is diffused and filtered outward from the bottom and the surrounding side of the filter cylinder 13 at the same time, thereby improving the filtration speed; on this basis, the filter net 2 located below the filter cylinder 13 performs secondary filtration on the material. Furthermore, the filter hole diameter of the filter net 2 is smaller than the filter hole diameter of the filter cylinder 13, thereby effectively improving the filtration accuracy.

[0029] As a specific embodiment of the alkali metal salt filtering and drying device provided by the utility model, see Figure 1 and Figure 2 A cover body 14 is provided above the filter cartridge 13 , the feed pipe 11 passes through the cover body 14 and is fixedly connected to the cover body 14 , the cover body 14 has a downward opening, and a plurality of balls 15 rollingly matched with the outer peripheral wall of the filter cartridge 13 are embedded on the inner peripheral wall of the cover body 14 .

[0030] In this embodiment, a cover 14 is provided to close the top opening of the filter cartridge 13 to prevent the material inside the filter cartridge 13 from spilling out when the filter cartridge 13 rotates, thereby affecting the subsequent filtering effect.

[0031] Furthermore, in order to increase the stability of the filter cartridge 13 during rotation, the cover body 14 is fixedly connected to the outer peripheral wall of the feed pipe 11, and at the same time, a plurality of balls 15 are embedded at intervals on the inner peripheral wall of the cover body 14, so that a rolling fit is formed between the upper edge of the outer peripheral wall of the filter cartridge 13 and the cover body 14. Since the cover body 14 is connected to the feed pipe 11, the filter cartridge 13 is fixed during relative rotation, so the inner peripheral wall of the cover body 14 provides a guiding support for the filter cartridge 13, and at the same time, the balls 15 further reduce the friction resistance of the filter cartridge 13 during rotation, so that the rotation of the filter cartridge 13 is more stable and smooth.

[0032] As a specific embodiment of the alkali metal salt filtering and drying device provided by the utility model, see Figure 1A conical ring plate 16 is provided inside the cylinder 1 and is located below the filter cylinder 13 . The outer edge of the conical ring plate 16 is connected to the inner wall of the cylinder 1 , and the outer edge of the filter screen 2 is connected to the inner edge of the conical ring plate 16 .

[0033] In this embodiment, the height of the outer edge of the conical ring plate 16 is higher than the height of the inner edge, so that the material filtered out of the filter cylinder 13 can be transported along the inclined surface of the conical ring plate 16 to the filter screen 2 connected to the inner edge of the conical ring plate 16, and the filter screen 2 is used to perform secondary filtration and screening on the material, and then the filtered material is smoothly introduced into the drying chamber 4 below the filter screen 2.

[0034] As a specific embodiment of the alkali metal salt filtering and drying device provided by the utility model, see Figure 1 An upper support plate 17 located below the filter screen 2 and a lower support plate 18 located below the upper support plate 17 are provided inside the cylinder 1. The drying chamber 4 is located between the upper support plate 17 and the lower support plate 18. A heating wire 19 is provided on the side of the upper support plate 17 and the lower support plate 18 facing away from the drying chamber 4. A discharge port 171 corresponding to the upper and lower parts of the filter screen 2 is provided on the upper support plate 17. The lower support plate 18 gradually tilts downward from the side away from the discharge pipe 12 to the side close to the discharge pipe 12, so as to guide the dried material into the discharge pipe 12.

[0035] In this embodiment, the upper support plate 17, the lower support plate 18 and the inner wall of the cylinder 1 enclose a drying chamber 4. The heating wire 19 arranged on the upper support plate 17 and the lower support plate 18 can ensure the temperature in the drying chamber 4, so that the moisture in the alkali metal salt crystal particles can be fully dissipated. Furthermore, a heat preservation layer can be provided on the outer wall of the cylinder 1 corresponding to the drying chamber 4 to reduce the heat loss in the drying chamber 4.

[0036] The material discharge port 171 on the upper support plate 17 is arranged correspondingly to the filter screen 2, which can ensure that the material passing through the filter screen 2 can smoothly enter the drying chamber 4, and avoid the material being scattered elsewhere and causing waste. The lower support plate 18 is inclined to the side of the discharge pipe 12, which can make the dried material automatically enter the discharge pipe 12, eliminating the need for the material discharge mechanism, which helps to reduce the manufacturing cost of the alkali metal salt filtering and drying equipment.

[0037] As a specific embodiment of the alkali metal salt filtering and drying device provided by the utility model, see Figure 1 The bottom of the cylinder 1 is connected to a driving member 7, and the driving member 7 is connected to a rotating shaft 71 extending upward. The rotating shaft 71 passes through the lower support plate 18, the upper support plate 17 and the filter screen 2 from bottom to top, and the upper end of the rotating shaft 71 is connected to the bottom wall of the filter cylinder 13.

[0038] In this embodiment, the driving member 7 can be a rotating power member such as a stepping motor, and the driving member 7 is arranged at the bottom of the cylinder 1 and connected to the bottom wall of the filter cylinder 13 through the rotating shaft 71 extending upward to drive the filter cylinder 13 to rotate. The above arrangement improves the space utilization rate of the alkali metal salt filtering and drying equipment and makes the structure of the equipment more compact.

[0039] Furthermore, a rubber sealing ring may be provided at the position where the rotating shaft 71 passes through the lower support plate 18 and the filter screen 2 , which not only ensures the sealing performance of the equipment but also helps to improve the stability of the rotating shaft 71 during rotation.

[0040] As a specific embodiment of the alkali metal salt filtering and drying device provided by the utility model, see Figure 1 The outer periphery of the rotating shaft 71 is connected with a guide cone plate 72 which tapers upward. The guide cone plate 72 is located in the drying chamber 4 and is arranged corresponding to the discharge port 171 above and below.

[0041] In this embodiment, the cross-sectional area of ​​the guide cone plate 72 gradually increases from top to bottom, which can diffuse the material entering from the discharge port 171 to the surroundings of the drying chamber 4, helping to extend the movement path of the material in the drying chamber 4, increase the drying time of the material, and effectively improve the drying efficiency of the material.

[0042] Furthermore, the guide cone plate 72 is arranged on the rotating shaft 71 and can rotate synchronously with the rotating shaft 71, so that the material falling on the top surface of the guide cone plate 72 not only moves radially outward along the guide cone plate 72, but also moves in a circular motion along the axis of the rotating shaft 71, thereby further extending the movement path of the material, improving the evaporation efficiency of water, and ensuring the drying effect of the material.

[0043] As a specific embodiment of the alkali metal salt filtering and drying device provided by the utility model, see Figure 1 The outer periphery of the rotating shaft 71 is connected with a stirring blade 73 , and the stirring blade 73 is located between the guide cone plate 72 and the lower support plate 18 .

[0044] In this embodiment, two stirring blades 73 are provided. The stirring blades 73 stir and turn the material introduced by the guide cone plate 72 as the rotating shaft 71 rotates, thereby preventing a large amount of material introduced in a short period of time from accumulating on the lower support plate 18. The stirring of the stirring blades 73 increases the contact area between the material and the hot air, thereby improving the drying efficiency.

[0045] As a specific embodiment of the alkali metal salt filtering and drying device provided by the utility model, see Figure 1 An air inlet 51 communicating with the outside is provided on one side of the air supply chamber 5 away from the cylinder 1 , and an air blower 52 and a heating tube 53 are provided in the air supply chamber 5 , and the air blower 52 is located between the air inlet 51 and the heating tube 53 .

[0046] In this embodiment, the blower 52 introduces external air through the air inlet 51, and passes through the heating tube 53 that releases heat to form hot air that is blown into the drying chamber 4. While drying the material, it helps to transport the water vapor evaporated from the material to the exhaust pipe 6, effectively avoiding the evaporated water vapor from contacting the alkali metal salt crystal particles again, thereby ensuring the drying effect.

[0047] As a specific embodiment of the alkali metal salt filtering and drying device provided by the utility model, see Figure 1 A moisture absorbing filter plate 54 is provided between the air inlet 51 and the air blower 52 .

[0048] In this embodiment, a moisture absorbing filter plate 54 is provided at the air inlet 51 to absorb moisture from the air sucked in by the blower 52 , thereby effectively removing moisture from the air and ensuring a dry environment in the drying chamber 4 .

[0049] As a specific embodiment of the alkali metal salt filtering and drying device provided by the utility model, see Figure 1 A filter cover 61 is provided at the air inlet end of the exhaust pipe 6 , and the filter cover 61 is connected to the inner wall of the drying chamber 4 .

[0050] In this embodiment, the filter cover 61 intercepts the alkali metal salt crystal particles mixed in the water vapor to prevent the alkali metal salt crystal particles from being discharged along with the water vapor through the exhaust pipe 6, thereby causing waste of materials.

[0051] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. A filtering and drying device for alkali metal salts, characterized in that: include: A cylinder body, with a filter screen inside, the filter screen divides the cylinder body into a filter chamber and a drying chamber located below the filter chamber, a feed pipe is provided at the top of the cylinder body, and a discharge pipe is provided at the bottom, a filter cartridge is rotatably connected in the filter chamber, the feed pipe extends downward into the filter cartridge, and a plurality of fixed blades located in the filter cartridge are provided on the outer peripheral wall of the feed pipe; An air supply chamber is arranged at the side of the cylinder and is connected to the drying chamber, and is used to supply hot air into the drying chamber; An exhaust pipe is communicated with the drying chamber and is located above the discharge pipe, and is used to discharge water vapor in the drying chamber.

2. The filtering and drying device for alkali metal salts according to claim 1, characterized in that: A cover body is provided above the filter cartridge, the feed pipe passes through the cover body and is fixedly connected to the cover body, the cover body has a downward opening, and a plurality of balls are embedded on the inner circumferential wall of the cover body and are rollingly matched with the outer circumferential wall of the filter cartridge.

3. The filtering and drying device for alkali metal salts according to claim 2, characterized in that: A conical ring plate located below the filter cylinder is arranged inside the cylinder, the outer edge of the conical ring plate is connected to the inner wall of the cylinder, and the outer edge of the filter screen is connected to the inner edge of the conical ring plate.

4. The filtering and drying device for alkali metal salts according to claim 1, characterized in that: An upper support plate located below the filter screen and a lower support plate located below the upper support plate are provided inside the cylinder, the drying chamber is located between the upper support plate and the lower support plate, heating wires are provided on the sides of the upper support plate and the lower support plate facing away from the drying chamber, a discharge port corresponding to the upper and lower sides of the filter screen is provided on the upper support plate, and the lower support plate gradually tilts downward from the side away from the discharge pipe to the side close to the discharge pipe, so as to guide the dried material into the discharge pipe.

5. The filtering and drying equipment for alkali metal salts according to claim 4, characterized in that: The bottom of the cylinder is connected to a driving member, and the driving member is connected to a rotating shaft extending upward. The rotating shaft passes through the lower support plate, the upper support plate and the filter screen from bottom to top, and the upper end of the rotating shaft is connected to the bottom wall of the filter cylinder.

6. The filtering and drying equipment for alkali metal salts according to claim 5, characterized in that: The outer periphery of the rotating shaft is connected with a guide cone plate which tapers upwards. The guide cone plate is located in the drying chamber and is arranged corresponding to the discharge port above and below.

7. The filtering and drying equipment for alkali metal salts according to claim 6, characterized in that: The outer periphery of the rotating shaft is connected with a stirring blade, and the stirring blade is located between the guide cone plate and the lower support plate.

8. A filtering and drying device for alkali metal salts according to any one of claims 1 to 7, characterized in that: The air supply chamber is provided with an air inlet connected to the outside at one side away from the cylinder, and an air supply fan and a heating tube are provided in the air supply chamber, wherein the air supply fan is located between the air inlet and the heating tube.

9. The filtering and drying equipment for alkali metal salts according to claim 8, characterized in that: A moisture absorption filter plate is provided between the air inlet and the air blower.

10. The filtering and drying equipment for alkali metal salts according to claim 1, characterized in that: The air inlet end of the exhaust pipe is provided with a filter cover, and the filter cover is connected to the inner wall of the drying chamber.

Images