Novel belt dryer

Abstract

The invention discloses a novel belt dryer, and relates to the field of lithium ore purification. According to the scheme, the device comprises a drying trolley used for containing a mixed acid solution and heating and drying the mixed acid solution; the supporting and guiding assembly is fixed to the surface of the rack and used for guiding the drying trolley, and the drying trolley is in rolling connection with the supporting and guiding assembly; the driving assemblies are distributed at the two ends of the rack and used for driving the drying trolley to roll on the supporting and guiding assemblies; and the fixed heating assembly is fixed to the rack, and the fixed heating assembly is electrically connected with the drying trolley in a sliding mode and used for supplying power to the drying trolley in a sliding mode. The supporting and guiding assembly is fixed to the rack, the drying trolleys are connected to the supporting and guiding assembly in a rolling mode, the drying trolleys are powered through the sliding power supply assembly in a sliding mode, power supply of each drying trolley can be independently controlled, the drying temperature can be controlled, the polytetrafluoroethylene lining plates are fixed to the surfaces of the trolley bodies, and bonding of mixed acid solutions is prevented.

Description

Technical Field

[0001] The present invention relates to the field of lithium ore purification, and particularly to a novel belt dryer. Background Art

[0002] Lithium ore contains a certain amount of lithium carbonate. After purification, lithium carbonate is the core material for battery production. During the purification process of lithium carbonate, a certain proportion of strong sulfuric acid needs to be mixed. After mixing, it becomes a paste-like viscous solution. This solution has strong corrosiveness and strong adhesiveness, and harmful substances will be emitted when heated, which brings various problems to the drying work.

[0003] Currently, the drying equipment uses high-temperature flue gas for drying. The high-temperature flue gas will mix with the harmful substances emitted during the drying process of lithium carbonate. The treatment volume of this part of the flue gas is large. And after mixing with acid, it becomes a paste-like viscous solution, which has strong corrosiveness and high adhesiveness, is easy to corrode the steel plate, and adheres to the steel plate, making it very difficult to clean.

[0004] In addition, there are specific requirements for the temperature during the drying of the lithium carbonate solution. If the temperature exceeds a certain level, lithium carbonate will decompose significantly. Therefore, the drying temperature needs to be strictly controlled. However, it is difficult to control the drying temperature of high-temperature flue gas. Summary of the Invention

[0005] In view of this, the purpose of the present invention is to propose a novel belt dryer to achieve an energy-saving, low-emission, and low-pollution drying equipment, and solve the drying difficulties after mixing lithium carbonate with acid.

[0006] To achieve the above technical purpose, the present invention provides a novel belt dryer:

[0007] It includes: a drying cart for containing the mixed acid solution and heating and drying the mixed acid solution; a support and guiding assembly fixed on the surface of the frame for guiding the drying cart, and the drying cart is in rolling connection with the support and guiding assembly; a driving assembly distributed at both ends of the frame for driving the drying cart to roll on the support and guiding assembly; a fixed heating assembly fixed on the frame, and the fixed heating assembly is in sliding electrical connection with the drying cart for slidingly supplying power to the drying cart.

[0008] Preferably, the driving assembly includes: two driving shafts, both of the two driving shafts are respectively rotatably connected to both ends of the frame through bearing seats; driving gears sleeved and fixed on the surfaces of the driving shafts; a planetary gear reducer fixed on the frame, and the output end is linked with the driving shaft.

[0009] Preferably, the support and guide assembly includes a first guide rail, a second guide rail, a first curved rail and a second curved rail. First curved rails are fixed at both ends of the first guide rail, and the first curved rails are fixedly connected to the inner wall of the frame. Second curved rails are fixed at both ends of the second guide rail, and the second curved rails are fixedly connected to the inner wall of the frame.

[0010] Preferably, the fixed heating assembly includes: a sealing cover fixed to the top of the frame; an air duct fixed to the upper surface of the sealing cover; an exhaust pipe fixed to the top of the air duct, and the inner cavity of the sealing cover is communicated with the inner cavity of the exhaust pipe through the air duct.

[0011] Preferably, a heat preservation pad and a first heating element are fixed inside the sealing cover, a sealing strip is fixed to the bottom of the sealing cover, and the sealing strip is slidably and sealingly connected to the drying cart.

[0012] Preferably, the drying cart includes a vehicle body. A connecting pipe is fixed to the bottom of the vehicle body, and the inside of the connecting pipe is hollow. Rollers are rotatably connected to both ends of the connecting pipe, and the rollers are in rolling connection with the support and guide assembly. A second heating element is fixed to the top of the vehicle body, a polytetrafluoroethylene lining plate is fixed to the upper surface of the second heating element, and a calcium silicate board is fixed inside the vehicle body and is located at the bottom of the second heating element.

[0013] Preferably, a controller is fixed inside the vehicle body, and the controller is used to control the power of the second heating element; a retaining wall is fixed to the upper surface of the polytetrafluoroethylene lining plate.

[0014] Preferably, the sliding power supply assembly includes a conductive slide rail, and a conductive slider is slidably connected to the outer surface of the conductive slide rail. The conductive slider is electrically connected to the controller through a wire.

[0015] Preferably, a feeding hopper is fixed to the top of the frame, and the feeding hopper is used for feeding the drying cart.

[0016] It can be seen from the above technical solutions that the present application has the following beneficial effects:

[0017] 1. By fixing a support and guide assembly on the frame, a drying cart is in rolling connection with the support and guide assembly, and the drying cart is slidably powered by a sliding power supply assembly. Each drying cart can be independently controlled for power supply, which is beneficial to controlling the drying temperature. Moreover, a polytetrafluoroethylene lining plate is fixed on the surface of the vehicle body to prevent the mixed acid solution from sticking.

[0018] 2. By fixing a fixed heating assembly above the frame, the fixed heating assembly is slidably and sealingly connected to the drying cart, which is beneficial to collecting the heated flue gas and is more environmentally friendly. Moreover, a first heating element is fixed inside the sealing cover, and in cooperation with the drying cart, the mixed acid solution can be heated simultaneously from above and below, improving the heating efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] In order to more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the following will briefly introduce the drawings required for the description of the embodiments or the prior art. Obviously, the drawings in the following description are only the embodiments of the present invention. For those of ordinary skill in the art, without creative efforts, other drawings can also be obtained based on the provided drawings.

[0020] Figure 1 FIG. 0 is a front view structural schematic diagram of a novel belt dryer provided by the present invention;

[0021] Figure 2 FIG. 1 is a side view cross-sectional structural schematic diagram of a novel belt dryer provided by the present invention;

[0022] Figure 3 FIG. 2 is a side view cross-sectional structural schematic diagram of a sealing cover of a novel belt dryer provided by the present invention;

[0023] Figure 4 FIG. 3 is a schematic diagram of the overall structure of the vehicle body of a novel belt dryer provided by the present invention;

[0024] Figure 5 FIG. 4 is a cross-sectional structural schematic diagram of a drying vehicle of a novel belt dryer provided by the present invention;

[0025] Figure 6 FIG. 5 is a front view structural schematic diagram of a support and guiding assembly of a novel belt dryer provided by the present invention;

[0026] Figure 7 FIG. 6 is an overall structural schematic diagram of a sliding power supply assembly of a novel belt dryer provided by the present invention.

[0027] BRIEF DESCRIPTION OF THE DRAWINGS: 1. Frame; 2. Driving assembly; 21. Driving shaft; 22. Driving gear; 23. Bearing seat; 24. Planetary gear speed reducer; 3. Support and guiding assembly; 31. First guide rail; 32. Second guide rail; 33. First curved rail; 34. Second curved rail; 4. Fixed heating assembly; 41. Sealing cover; 411. Heat insulation pad; 412. First heating element; 413. Sealing strip; 42. Air duct; 43. Exhaust pipe; 5. Drying vehicle; 51. Vehicle body; 52. Second heating element; 53. Polytetrafluoroethylene lining; 531. Enclosure; 54. Connecting pipe; 55. Roller; 56. Controller; 57. Calcium silicate board; 6. Sliding power supply assembly; 61. Conductive slide rail; 62. Conductive slider; 7. Feeding hopper. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0028] The following description is merely exemplary in nature and is not intended to limit the present disclosure, application, and use. It should be understood that in all of these figures, the same or similar reference numerals indicate the same or similar parts and features. The various drawings only schematically represent the concepts and principles of the embodiments of the present disclosure, and do not necessarily show the specific dimensions and proportions of the various embodiments of the present disclosure. Specific parts in specific drawings may be exaggerated to illustrate the relevant details or structures of the embodiments of the present disclosure.

[0029] Example, see Figure 1-7 The novel belt drying machine comprises a frame 1, a driving assembly 2, a supporting and guiding assembly 3, a fixed heating assembly 4 and a drying vehicle 5;

[0030] The frame 1 mainly adopts a welded structure of steel and steel plates made of ordinary materials. The frame 1 is composed of multiple columns and beams, and the columns and beams are connected by high-performance grade bolts; for example, the frame 1 is positioned by fixtures during manufacturing to ensure the position and shape size, and ensure 100% installation accuracy;

[0031] See also Figure 2 and Figure 6 As shown, the support and guide assembly 3 is fixed to the surface of the frame 1 and is used to guide the drying vehicle 5. The support and guide assembly 3 includes a first guide rail 31, a second guide rail 32, a first curved rail 33 and a second curved rail 34. The first curved rails 33 are fixed to both ends of the first guide rail 31, and the first curved rail 33 is fixedly connected to the inner wall of the frame 1. The second curved rails 34 are fixed to both ends of the second guide rail 32, and the second curved rail 34 is fixedly connected to the inner wall of the frame 1. The drying vehicle 5 is evenly arranged on the first guide rail 31, the second guide rail 32, the first curved rail 33 and the second curved rail 34.

[0032] Specifically, the driving assembly 2 is distributed at both ends of the frame 1. The driving assembly 2 is used to drive the drying vehicle 5 to roll on the supporting guide assembly 3. The driving assembly 2 includes a driving shaft 21, a driving gear 22, a bearing seat 23 and a planetary gear reducer 24. Two driving shafts 21 are provided. Both driving shafts 21 are rotatably connected to both ends of the frame 1 through the bearing seat 23; the driving gear 22 is sleeved and fixed on the surface of the driving shaft 21; the planetary gear reducer 24 is fixed on the frame 1, and the output end of the planetary gear reducer 24 is linked with the driving shaft 21;

[0033] In some embodiments, the drive gear 22 is composed of a hub and a toothed plate. The hub is sleeved and fixed on the drive shaft 21, and the toothed plate is fixed on the hub. In this way, when the toothed plate is worn, only the toothed plate needs to be replaced, which saves costs and reduces the processing difficulty of the toothed plate. Specifically, the toothed plate is processed by a CNC machining center, and the processing process is formed in one time to ensure dimensional accuracy. When manufacturing and assembling, the tooth profiles of the two toothed plates are ensured to be synchronous, and the error is ≤0.5 mm. A small gear is fixed on the output shaft of the planetary gear reducer 24, and a large gear is fixed at the end of the drive shaft 21. The small gear meshes with the large gear, and the large gear is driven to rotate by the small gear to increase the rotational torque.

[0034] Refer to Figure 2 , Figure 4 and Figure 5 As shown, the drying cart 5 is used to hold the mixed acid solution and heat and dry the mixed acid solution. The drying cart 5 includes a vehicle body 51. A connecting pipe 54 is fixed at the bottom of the vehicle body 51, and the inside of the connecting pipe 54 is hollow. Rollers 55 are rotatably connected to both ends of the connecting pipe 54, and the rollers 55 are in rolling connection with the support and guiding assembly 3. A second heating element 52 is fixed on the top of the vehicle body 51, and a polytetrafluoroethylene lining plate 53 is fixed on the upper surface of the second heating element 52. A calcium silicate board 57 is fixed inside the vehicle body 51, and the calcium silicate board 57 is located at the bottom of the second heating element 52 to prevent heat dissipation inside the vehicle body 51. A controller 56 is fixed inside the vehicle body 51, and the controller 56 is used to control the power of the second heating element 52. A retaining wall 531 is fixed on the upper surface of the polytetrafluoroethylene lining plate 53. The second heating element 52 uses a resistance wire or a heating tube, and no specific limitation is made here.

[0035] More specifically, the drying cart 5 is used to carry and transport materials through the drying section to realize on-board drying of the materials. The drying cart 5 has the characteristics of complex stress, large quantity, high and uneven working temperature, etc., and needs to have certain thermal shock and thermal fatigue resistance. Therefore, the structural design, material selection, and manufacturing requirements of the vehicle body 51 are relatively high to improve its service life. Refer to Figure 4 As shown, the vehicle body 51 is composed of welded steel plates, and a plurality of reinforcing ribs are distributed on the surface to ensure the strength of the vehicle body 51.

[0036] Since the lithium carbonate after mixing with acid has corrosiveness and adhesiveness, this adhesion does not occur on the lining plate of special material. In this embodiment, the lining plate is selected as the polytetrafluoroethylene lining plate 53, and the polytetrafluoroethylene lining plate 53 can remain unchanged under high-temperature performance. The polytetrafluoroethylene lining plate 53 is used as the material-bearing surface to prevent material adhesion.

[0037] Furthermore, the fixed heating component 4 is fixed on the frame 1, and the fixed heating component 4 is electrically connected to the drying cart 5 in a sliding manner, so as to supply power for the sliding of the drying cart 5; the fixed heating component 4 includes a sealing cover 41, an air duct 42 and an exhaust pipe 43, the sealing cover 41 is fixed on the top of the frame 1; the air duct 42 is fixed on the upper surface of the sealing cover 41; the exhaust pipe 43 is fixed on the top of the air duct 42, and the inner cavity of the sealing cover 41 is connected with the inner cavity of the exhaust pipe 43 through the air duct 42; at least three air ducts 42 are provided, and the three air ducts 42 are distributed at the head, middle and tail of the sealing cover 41, and the gas generated during drying is collected through the exhaust pipe 43 to prevent the overflow of harmful gas.

[0038] A heat preservation pad 411 and a first heating element 412 are fixed inside the sealing cover 41, a sealing strip 413 is fixed at the bottom of the sealing cover 41, and the sealing strip 413 is slidably sealed and connected to the drying vehicle 5, and the first heating element 412 is a resistance wire or a heating tube, which is not specifically limited here;

[0039] Furthermore, the sliding power supply assembly 6 includes a conductive slide rail 61, and the outer surface of the conductive slide rail 61 is slidably connected to a conductive slider 62, and the conductive slider 62 is electrically connected to the controller 56 through a wire. Exemplarily, the wire passes through the connecting pipe 54 of the drying vehicle 5 and is electrically connected to the controller 56.

[0040] Furthermore, a lower hopper 7 is fixed on the top of the frame 1 , and the lower hopper 7 is used to supply materials to the drying vehicle 5 .

[0041] Exemplarily, each drying cart 5 passes through, and the controller 56 is used to control the power of the second heating element 52, so as to independently control the temperature of each drying cart 5 to ensure the accuracy of the heating temperature. Each drying cart 5 carries a certain amount of slurry and moves slowly for drying. There is no external smoke in the drying process, and only a small amount of smoke is discharged when the material is dried. This part of the smoke can be collected for processing; the purpose is that by independently controlling the temperature, the drying temperature can be adjusted according to the characteristics of the slurry to improve the drying effect. For example, through a pressure sensor or machine vision, the weight or color characteristics of the slurry on the surface of each drying cart 5 are collected, and these characteristics are used as the basis for adjusting the temperature, so as to achieve targeted drying; it should be noted that the relationship between characteristics such as weight or color and the drying temperature is obtained by the technology in this field through a large number of experiments, and is not specifically limited here.

[0042] Working principle: This embodiment uses a planetary gear reducer 24 to provide power, and the large gear and the small gear are meshed to reduce the speed and increase the torque, thereby driving the driving gear 22 to rotate through the driving shaft;

[0043] The driving gear 22 moves the roller 55 of the drying vehicle 5, thereby driving the drying vehicle 5 to slide on the supporting guide assembly 3;

[0044] The drying cart 5 is powered by the sliding power supply assembly 6. When the drying cart 5 moves below the feeding hopper 7, it is fed with materials. The control and quantity of feeding are determined by those skilled in the art according to the actual situation.

[0045] When the drying cart 5 slides on the conductive rail 61 with the conductive slider 62, it is powered, and the second heating element 52 is controlled by the controller 56 to generate heat to dry the slurry on the polytetrafluoroethylene lining 53.

[0046] At the same time, the first heating element 412 is also powered on to heat, drying the upper surface of the slurry to achieve double-sided heating and improve the heating efficiency. When the drying cart 5 moves to the first curved rail 33 or the second curved rail 34, such as when moving to the first curved rail 33 or the second curved rail 34 far from the feeding hopper 7, the drying of the drying cart 5 is completed. At this time, the power is cut off to reduce energy waste. The drying cart 5 is flipped, and the slurry on the drying cart 5 falls due to its own weight. In this embodiment, a conveyor belt or a collection tank can be installed below the drying cart 5 to collect the dried slurry. When the drying cart 5 moves to the first curved rail 33 or the second curved rail 34 close to the feeding hopper 7, the drying cart 5 is powered on to achieve preheating.

[0047] The flue gas generated during the drying process is sealed by the sealing cover 41, and the flue gas enters the exhaust pipe 43 through the guide pipe. The exhaust pipe 43 can be connected to external gas purification equipment for treatment. During the entire operation process of this embodiment, through electric heating, emissions are reduced, effectively reducing the operating cost, thereby achieving the performance of energy conservation and environmental protection.

[0048] In the above text, the exemplary embodiments of the solutions proposed by the present disclosure are described in detail with reference to the preferred embodiments. However, those skilled in the art can understand that, without departing from the concept of the present disclosure, various modifications and variations can be made to the above specific embodiments, and various combinations of the technical features and structures proposed by the present disclosure can be made without exceeding the protection scope of the present disclosure. The protection scope of the present disclosure is determined by the appended claims.

Claims

1. A new type of belt dryer, characterized in that, Comprising: A drying cart (5) for containing the mixed acid solution and heating and drying the mixed acid solution; A support and guiding assembly (3) fixed on the surface of the frame (1) for guiding the drying cart (5), and the drying cart (5) is in rolling connection with the support and guiding assembly (3); A driving assembly (2) distributed at both ends of the frame (1) for driving the drying cart (5) to roll on the support and guiding assembly (3); A fixed heating assembly (4) fixed on the frame (1), and the fixed heating assembly (4) is in sliding electrical connection with the drying cart (5) for slidingly supplying power to the drying cart (5).

2. The novel belt dryer according to claim 1, characterized in that, The driving assembly (2) includes: Two driving shafts (21), and both of the two driving shafts (21) are respectively rotatably connected to both ends of the frame (1) through bearing seats (23); Driving gears (22) sleeved and fixed on the surface of the driving shafts (21); A planetary gear reducer (24) fixed on the frame (1), and the output end is linked with the driving shaft (21).

3. A novel belt dryer according to claim 1, characterized in that, The support and guiding assembly (3) includes a first guide rail (31), a second guide rail (32), a first curved rail (33) and a second curved rail (34). Both ends of the first guide rail (31) are fixed with the first curved rails (33), and the first curved rails (33) are fixedly connected to the inner wall of the frame (1). Both ends of the second guide rail (32) are fixed with the second curved rails (34), and the second curved rails (34) are fixedly connected to the inner wall of the frame (1).

4. A novel belt dryer according to claim 1, wherein, The fixed heating assembly (4) includes: A sealing cover (41) fixed on the top of the frame (1); An air guide pipe (42) fixed on the upper surface of the sealing cover (41); An exhaust pipe (43) fixed on the top of the air guide pipe (42), and the inner cavity of the sealing cover (41) is communicated with the inner cavity of the exhaust pipe (43) through the air guide pipe (42).

5. A novel belt dryer according to claim 4, characterized in that, A heat preservation pad (411) and a first heating element (412) are fixed inside the sealing cover (41), and a sealing strip (413) is fixed at the bottom of the sealing cover (41), and the sealing strip (413) is in sliding sealing connection with the drying cart (5).

6. A novel belt dryer according to claim 1, characterized in that, The drying cart (5) includes a vehicle body (51). A connecting pipe (54) is fixed at the bottom of the vehicle body (51), and the inside of the connecting pipe (54) is hollow. Both ends of the connecting pipe (54) are rotatably connected with rollers (55), and the rollers (55) are in rolling connection with the support and guiding assembly (3). A second heating element (52) is fixed on the top of the vehicle body (51). A polytetrafluoroethylene lining plate (53) is fixed on the upper surface of the second heating element (52). A calcium silicate board (57) is fixed inside the vehicle body (51), and the calcium silicate board (57) is located at the bottom of the second heating element (52).

7. A novel belt dryer according to claim 6, characterized in that, A controller (56) is fixed inside the vehicle body (51), and the controller (56) is used to control the power of the second heating element (52); A retaining wall (531) is fixed on the upper surface of the polytetrafluoroethylene lining plate (53).

8. A novel belt dryer according to claim 6, characterized in that, The sliding power supply assembly (6) includes a conductive slide rail (61), and a conductive slider (62) is slidably connected to the outer surface of the conductive slide rail (61). The conductive slider (62) is electrically connected to the controller (56) through a wire.

9. A novel belt dryer according to claim 1, characterized in that, A blanking hopper (7) is fixed to the top of the frame (1), and the blanking hopper (7) is used to supply materials to the drying cart (5).

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