Double-cone vacuum drier and silver nitrate drying method

Abstract

The application belongs to the technical field of drying equipment, and particularly relates to a double-cone vacuum drying machine and a silver nitrate drying method. The double-cone vacuum drying machine comprises a stock bin, a gas path mechanism, a heat source mechanism, a first power mechanism, a blowing adjustment mechanism and a second power mechanism. The second power mechanism drives the arc-shaped plate in the blowing adjustment mechanism to reciprocatingly rotate relative to the transfer bin, so as to adjust the direction and flow rate of the hot nitrogen gas blown out of the upper opening of the transfer bin. When the arc-shaped plate rotates clockwise, the wet silver nitrate material that is flipped upward under the action of centrifugal force is blown away. The second power mechanism cooperates with the blowing adjustment mechanism to reciprocatingly adjust the blowing direction and blowing flow rate of the hot nitrogen gas, which can not only ensure that the dry layer on the surface of the wet silver nitrate material is broken, but also avoid the problem that the wet silver nitrate material splashes after the dry layer on the surface of the wet silver nitrate material is broken. That is, the problem that the heat and mass transfer path inside the wet silver nitrate material is lengthened after the dry layer is formed on the surface of the wet silver nitrate material, which affects the drying efficiency and drying time, is overcome.

Description

Technical Field

[0001] This invention belongs to the field of drying equipment technology, specifically relating to dryers, and more particularly to a double-cone vacuum dryer and a method for drying silver nitrate. Background Technology

[0002] When using a double-cone vacuum dryer for vacuum drying, as drying continues, the vacuum level inside the dryer tends to stabilize in the middle and later stages of drying. The moisture on the surface of the wet silver nitrate material evaporates completely, forming a dry layer on the surface of the wet silver nitrate material. The vaporization of the moisture gradually moves into the interior of the wet silver nitrate material. At this time, the heat and mass transfer pathway inside the wet silver nitrate material is lengthened, and the evaporation rate of the wet silver nitrate material decreases, resulting in a significant reduction in drying efficiency and a significant increase in drying time.

[0003] Therefore, there is an urgent need to develop a new double-cone vacuum dryer and a silver nitrate drying method to solve the technical problem that the formation of a dry layer on the surface of wet silver nitrate affects the internal heat and mass transfer of the wet silver nitrate.

[0004] It should be noted that the information disclosed in this background section is only for understanding the background technology of the present application concept, and therefore, the above description is not considered to constitute prior art information. Summary of the Invention

[0005] This disclosure provides at least one double-cone vacuum dryer and a method for drying silver nitrate.

[0006] In a first aspect, this disclosure provides a double-cone vacuum dryer, comprising: a hopper, an air passage mechanism, a heat source mechanism, a first power mechanism, a blowing adjustment mechanism, and a second power mechanism; wherein the air passage mechanism is connected to the inner cavity of the hopper, the heat source mechanism is connected to the outer cavity of the hopper, and the first power mechanism is connected to the hopper; the blowing adjustment mechanism is located in the inner cavity, is connected to the air passage mechanism, and the second power mechanism is movably connected to the blowing adjustment mechanism; when wet silver nitrate is added to the inner cavity, the air passage mechanism evacuates the inner cavity and blows hot nitrogen into the blowing adjustment mechanism, and the heat source mechanism circulates... A heat source is pumped into the outer cavity, and the first power mechanism drives the hopper to rotate to dry the wet silver nitrate material in the inner cavity; the second power mechanism drives the arc plate in the blowing adjustment mechanism to reciprocate relative to the transfer hopper to adjust the direction and flow rate of hot nitrogen gas blown out from the opening on the transfer hopper; when the arc plate rotates clockwise, the opening gradually closes and the flow rate of nitrogen gas blown out from the opening gradually increases, so as to disperse the wet silver nitrate material that is turned up under the action of centrifugal force; when the arc plate rotates counterclockwise, the opening gradually opens and the flow rate of nitrogen gas blown out from the opening gradually decreases, so as to attract the dispersed wet silver nitrate material to concentrate at the bottom of the inner cavity.

[0007] In one optional embodiment, the gas path mechanism includes: an air extraction pipeline and a vacuum pump; the air extraction pipeline is connected to the inner cavity; the air extraction pipeline is connected to the vacuum pump to evacuate the inner cavity.

[0008] In one optional embodiment, the gas path mechanism includes: an inflation line and a nitrogen pump; the inflation line extends into the inner cavity and communicates with the blowing adjustment mechanism; the inflation line is connected to the nitrogen pump to charge the blowing adjustment mechanism with heated nitrogen.

[0009] In one optional embodiment, the heat source mechanism includes: a liquid-conducting pipeline and a heat source pump; the liquid-conducting pipeline is connected to an external cavity; the liquid-conducting pipeline is connected to the heat source pump to circulate and pump a heat source into the external cavity.

[0010] In one optional embodiment, the air blowing adjustment mechanism includes: a transfer chamber and an arc-shaped plate; the air passage mechanism has an air filling pipe connected to the transfer chamber, the arc-shaped plate is located inside the transfer chamber, and the arc-shaped plate is movably connected to a second power mechanism; the transfer chamber has an opening, and the opening is located on the moving path of the arc-shaped plate; the second power mechanism drives the arc-shaped plate to reciprocate relative to the transfer chamber to adjust the direction and flow rate of hot nitrogen gas blown out from the opening.

[0011] In one alternative embodiment, the transfer compartment is cylindrical, and the arc-shaped plate is fitted to the inner wall of the transfer compartment.

[0012] In one optional embodiment, a first guide plate is provided along the upper edge of the opening, and a second guide plate is provided on the arc-shaped plate. The first guide plate and the second guide plate are arranged in a V-shape to guide hot nitrogen gas to be blown out from between the first guide plate and the second guide plate.

[0013] In one alternative embodiment, the second power mechanism includes a rotation drive member connected to the arc-shaped plate to drive the arc-shaped plate to rotate.

[0014] In one optional embodiment, the first power mechanism includes: a belt-driven power source; the belt-driven power source is connected to the hopper to drive the hopper to rotate.

[0015] In one alternative embodiment, the hopper is provided with a jacket to separate an inner cavity and an outer cavity within the hopper.

[0016] Secondly, this disclosure also provides a method for drying silver nitrate as described above, comprising: placing wet silver nitrate material into an inner cavity, evacuating the inner cavity and blowing hot nitrogen into a blowing adjustment mechanism, and circulating a heat source into the outer cavity, while driving the hopper to rotate to dry the wet silver nitrate material in the inner cavity; driving the arc plate in the blowing adjustment mechanism to reciprocate relative to the transfer chamber to adjust the direction and flow rate of the hot nitrogen blowing out from the opening on the transfer chamber, and when the arc plate rotates clockwise, the opening gradually closes and the flow rate of the nitrogen blowing out from the opening gradually increases, so as to disperse the wet silver nitrate material that is turned upward under the action of centrifugal force.

[0017] The beneficial effects of this invention are that it transfers heat from the outer cavity to the inner cavity through a heat source mechanism, while the gas path mechanism injects heat directly into the inner cavity through a blowing adjustment mechanism, achieving bidirectional heat conduction to improve drying efficiency. The second power mechanism, in conjunction with the blowing adjustment mechanism, repeatedly adjusts the blowing direction and flow rate of hot nitrogen, ensuring that the dry layer on the surface of the wet silver nitrate material is broken, while avoiding the problem of splashing of the wet silver nitrate material after breaking the dry layer. In other words, it overcomes the problem that the internal heat and mass transfer path is lengthened after the formation of a dry layer on the surface of the wet silver nitrate material, which affects the drying efficiency and drying time.

[0018] Other features and advantages of the invention will be set forth in the following description, and will be apparent in part from the description, or may be learned by practicing the invention. The objects and other advantages of the invention are realized and obtained through the structures particularly pointed out in the description and the drawings.

[0019] To make the above-mentioned objects, features and advantages of the present invention more apparent and understandable, preferred embodiments are described in detail below with reference to the accompanying drawings. Attached Figure Description

[0020] To more clearly illustrate the specific embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the specific embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of the present invention. For those skilled in the art, other drawings can be obtained from these drawings without creative effort.

[0021] Figure 1 A structural diagram of a double-cone vacuum dryer provided in an embodiment of this disclosure;

[0022] Figure 2 A cross-sectional view of a double-cone vacuum dryer provided in an embodiment of this disclosure;

[0023] Figure 3 A structural diagram of an air blowing adjustment mechanism provided in an embodiment of this disclosure;

[0024] Figure 4 A cross-sectional view of an air blowing adjustment mechanism provided in an embodiment of this disclosure;

[0025] Figure 5 A schematic diagram of a blowing adjustment mechanism for blowing wet silver nitrate material according to an embodiment of this disclosure;

[0026] Figure 6 This is a schematic diagram of a blowing adjustment mechanism for collecting wet silver nitrate material, provided in an embodiment of this disclosure.

[0027] In the picture:

[0028] 1. Hopper; 11. Inner cavity; 12. Outer cavity; 13. Jacket;

[0029] 2. Air circuit mechanism; 21. Air extraction pipeline; 22. Air inflation pipeline;

[0030] 3. Heat source mechanism; 31. Liquid flow pipeline; 32. Heat source pump;

[0031] 4. First power mechanism; 41. Belt drive power source;

[0032] 5. Air blowing adjustment mechanism; 51. Transfer chamber; 511. Opening; 512. Air inlet; 52. Arc-shaped plate; 53. First guide plate; 54. Second guide plate; 55. Connecting plate;

[0033] 6. Second power mechanism; 61. Rotation drive component;

[0034] 7. Silver nitrate wet material. Detailed Implementation

[0035] To make the objectives, technical solutions, and advantages of the embodiments of the present invention clearer, the technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0036] In this document, when it is mentioned that a first component is located on a second component, this can mean that the first component can be directly formed on the second component, or that a third component can be inserted between the first and second components. Furthermore, in the accompanying drawings, the thickness of the components may be exaggerated or reduced for the purpose of effectively describing the technical content.

[0037] In this document, when an element or layer is referred to as “located,” “joined to,” “connected to,” “attached to,” or “coupled to” another element or layer, it may be directly located, joined, connected, attached to, or coupled to the other element or layer, or there may be intermediate elements or layers present. Conversely, when an element is referred to as “directly on another element or layer,” “directly joined to,” “directly connected to,” “directly attached to,” or “directly coupled to” another element or layer, there may be no intermediate elements or layers present. Other terms used to describe relationships between elements should be interpreted in a similar manner (e.g., “between” versus “directly between,” “adjacent” versus “directly adjacent,” etc.). As used herein, the term “and / or” includes any and all combinations of one or more of the related listed items.

[0038] In this document, exemplary embodiments of the present disclosure will be described in more detail with reference to the accompanying drawings. As used herein, expressions such as “at least one of…” modify the entire list of elements when following a list of elements, rather than individual elements in the list. For example, the expression “at least one of a, b, and c” should be understood to include only a, only b, only c, both a and b, both a and c, both b and c, or all of a, b, and c.

[0039] The terminology used herein is for the purpose of describing specific exemplary configurations only and is not intended to be limiting. As used herein, the singular articles “a,” “an,” and “the” may also be intended to include plural forms unless otherwise clearly stated herein. The terms “comprising,” “including,” and “having” are inclusive and thus specify the presence of features, steps, operations, elements, and / or components, but do not preclude the presence or addition of one or more other features, steps, operations, elements, components, and / or combinations thereof. The method steps, processes, and operations described herein should not be construed as requiring them to be performed in the specific order discussed or shown, unless specifically identified as such. Additional or alternative steps may be employed.

[0040] As used herein, the phrases “in one embodiment,” “according to one embodiment,” “in some embodiments,” etc., generally refer to the fact that a particular feature, structure, or characteristic following the phrase can be included in at least one embodiment of this disclosure. Therefore, a particular feature, structure, or characteristic can be included in more than one embodiment of this disclosure, such that these phrases do not necessarily refer to the same embodiment. As used herein, the terms “example,” “exemplary,” etc., are used to “serve as an example, instance, or illustration.” Any implementation, aspect, or design described herein as “example” or “exemplary” is not necessarily to be construed as preferred or superior to other implementations, aspects, or designs. Rather, the use of the terms “example,” “exemplary,” etc., is intended to present concepts in a specific manner.

[0041] Research has shown that when using a double-cone vacuum dryer for vacuum drying, as drying continues, the vacuum level inside the dryer tends to stabilize in the later stages. The surface moisture of the wet silver nitrate material evaporates completely, forming a dry layer. The vaporization of moisture gradually moves into the interior of the wet silver nitrate material. At this point, the heat and mass transfer pathways within the wet silver nitrate material are lengthened, resulting in a smaller evaporation rate and a significantly reduced drying efficiency and a considerably longer drying time. Furthermore, because the top and bottom of the double-cone vacuum dryer are cone-shaped, the wet silver nitrate material tends to deposit inside the two cones, making it difficult to disperse.

[0042] Based on the above research, this disclosure provides a double-cone vacuum dryer and a silver nitrate drying method, which disperses the clumps of wet silver nitrate material, destroys the drying layer formed on its surface, and realizes heat and mass transfer to the interior of the wet silver nitrate material to improve drying efficiency.

[0043] The shortcomings of the above solutions are the result of the inventor's practical experience and careful research. Therefore, the discovery process of the above problems and the solutions proposed in this disclosure should be considered as the inventor's contribution to this disclosure.

[0044] It should be noted that similar labels and letters in the following figures indicate similar items. Therefore, once an item is defined in one figure, it does not need to be further defined and explained in subsequent figures.

[0045] The following detailed description of some embodiments of the present invention is provided in conjunction with the accompanying drawings. Unless otherwise specified, the following embodiments and features can be combined with each other.

[0046] like Figures 1 to 6As shown, at least one embodiment provides a double-cone vacuum dryer, comprising: a hopper 1, an air passage mechanism 2, a heat source mechanism 3, a first power mechanism 4, a blowing adjustment mechanism 5, and a second power mechanism 6; wherein the air passage mechanism 2 is connected to the inner cavity 11 of the hopper 1, the heat source mechanism 3 is connected to the outer cavity 12 of the hopper 1, and the first power mechanism 4 is connected to the hopper 1; the blowing adjustment mechanism 5 is located in the inner cavity 11, the blowing adjustment mechanism 5 is connected to the air passage mechanism 2, and the second power mechanism 6 is movably connected to the blowing adjustment mechanism 5; when wet silver nitrate material 7 is added to the inner cavity 11, the air passage mechanism 2 evacuates the inner cavity 11 and blows hot nitrogen gas into the blowing adjustment mechanism 5, and the heat source mechanism 3 circulates gas into the outer cavity 12. A heat source is pumped in, and the first power mechanism 4 drives the hopper 1 to rotate, so as to dry the wet silver nitrate material 7 in the inner cavity 11; the second power mechanism 6 drives the arc plate 52 in the blowing adjustment mechanism 5 to reciprocate relative to the transfer hopper 51, so as to adjust the direction and flow rate of hot nitrogen blowing out from the opening 511 on the upper part of the transfer hopper 51. When the arc plate 52 rotates clockwise, the opening 511 gradually closes and the flow rate of nitrogen blowing out from the opening 511 gradually increases, so as to disperse the wet silver nitrate material 7 that is turned up under the action of centrifugal force; when the arc plate 52 rotates counterclockwise, the opening 511 gradually opens and the flow rate of nitrogen blowing out from the opening 511 gradually decreases, so as to attract the dispersed wet silver nitrate material 7 to concentrate at the bottom of the inner cavity 11.

[0047] In at least one embodiment, heat is transferred from the outer cavity 12 to the inner cavity 11 through the heat source mechanism 3. At the same time, the air path mechanism 2 injects heat directly into the inner cavity 11 through the air blowing adjustment mechanism 5 to achieve bidirectional heat conduction and improve drying efficiency. Since the hopper 1 is set in a double cone shape, the silver nitrate wet material 7 that is turned up under the action of centrifugal force can only be blown away when the hot nitrogen is blown out in the direction of the non-cone barrel of the hopper 1 by adjusting the air blowing adjustment mechanism 5 and the blowing speed is strong. If the hot nitrogen is blown out continuously after breaking the dry layer on the surface of the silver nitrate wet material 7, it will cause the silver nitrate wet material 7 to splash. By using the second power mechanism 6 in conjunction with the air blowing adjustment mechanism 5 to repeatedly adjust the blowing direction and blowing speed of the hot nitrogen, it can ensure that the dry layer on the surface of the silver nitrate wet material 7 is broken, and avoid the problem of silver nitrate wet material 7 splashing after breaking the dry layer on the surface of the silver nitrate wet material 7. That is, it overcomes the problem that the internal heat and mass transfer path is lengthened after the dry layer is formed on the surface of the silver nitrate wet material 7, which affects the drying efficiency and drying time.

[0048] In at least one embodiment, please refer to Figure 2 The gas path mechanism 2 includes: a vacuum pipe 21 and a vacuum pump; the vacuum pipe 21 is connected to the inner cavity 11; the vacuum pipe 21 is connected to the vacuum pump to evacuate the inner cavity 11.

[0049] Specifically, the vacuum pipe 21, in conjunction with the vacuum pump, can create a vacuum in the inner cavity 11, thereby lowering the boiling point of the liquid in the wet silver nitrate material 7 to allow the solvent to precipitate out. It can also extract water vapor. By combining the reduction of the boiling point to enhance evaporation and the tumbling to renew the heat transfer surface, the wet silver nitrate material 7 is dried.

[0050] In at least one embodiment, please refer to Figure 2 The gas path mechanism 2 includes: an inflation pipe 22 and a nitrogen pump; the inflation pipe 22 extends into the inner cavity 11 and is connected to the blowing adjustment mechanism 5; the inflation pipe 22 is connected to the nitrogen pump to fill the blowing adjustment mechanism 5 with heated nitrogen.

[0051] Specifically, the nitrogen pump's pumping rate is less than the vacuum pump's extraction rate, ensuring that the water vapor generated during the drying of the wet silver nitrate material 7 is extracted.

[0052] Specifically, both the air extraction pipe 21 and the air inflation pipe 22 are rigid pipes, and the air inflation pipe 22 is inside the air extraction pipe 21.

[0053] Specifically, the gas filling pipe 22, in conjunction with the nitrogen pump, replenishes the inner cavity 11 with hot nitrogen, which can accelerate the drying of the wet silver nitrate material 7.

[0054] Specifically, hot nitrogen is pumped into the inner cavity 11, and the vacuum level of the inner cavity 11 is controlled by controlling the air intake. Hot nitrogen is used to assist the drying of wet materials. In the later stage of silver nitrate drying, due to the small amount of material evaporation and the small pressure difference between the inside and outside of the material pile, the drying efficiency is significantly reduced and the drying time is significantly prolonged. Therefore, pumping hot nitrogen into the inner cavity 11 during drying can promote drying.

[0055] In at least one embodiment, please refer to Figure 2 The heat source mechanism 3 includes: a liquid passage 31 and a heat source pump 32; the liquid passage 31 is connected to the outer cavity 12; the liquid passage 31 is connected to the heat source pump 32 to circulate and pump the heat source into the outer cavity 12.

[0056] Specifically, the moist silver nitrate wet material 7 is put into the inner cavity 11, and the heat source pump 32 pumps the heat source (including but not limited to hot water) into the inner cavity 11 through the liquid passage 31 to raise the temperature in the inner cavity 11.

[0057] In at least one embodiment, please refer to Figure 3 , Figure 4The blowing adjustment mechanism 5 includes a transfer chamber 51 and an arc-shaped plate 52; the air passage 22 in the air passage mechanism 2 is connected to the transfer chamber 51, the arc-shaped plate 52 is located inside the transfer chamber 51, and the arc-shaped plate 52 is movably connected to the second power mechanism 6; the transfer chamber 51 has an opening 511, and the opening 511 is located on the moving path of the arc-shaped plate 52; the second power mechanism 6 drives the arc-shaped plate 52 to reciprocate relative to the transfer chamber 51 to adjust the direction and flow rate of hot nitrogen gas blown out from the opening 511.

[0058] Specifically, please refer to Figure 4 The arc-shaped plate 52 rotates along the F2 direction under the drive of the second power mechanism 6, while simultaneously... Figure 2 The direction of F2 is the same as that of F1.

[0059] Specifically, the transfer chamber 51 has an air inlet 512, and the air filling pipe 22 is connected to the interior of the transfer chamber 51 through the air inlet 512. At the same time, the nitrogen pump maintains a constant working state. When the arc plate 52 rotates, it can adjust the size of the opening 511. That is, the larger the opening 511, the slower the flow rate, and the smaller the opening 511, the faster the flow rate.

[0060] Specifically, please refer to Figure 5 When the second power mechanism 6 drives the arc plate 52 to rotate clockwise, the opening 511 gradually closes from the lower edge to the upper edge. At the same time, the flow rate of nitrogen gas blowing out from the opening 511 gradually increases. Meanwhile, the wet silver nitrate material 7 itself will be deposited at the bottom of the inner cavity 11 due to gravity. However, if the opening 511 blows towards the bottom of the inner cavity 11, the wet silver nitrate material 7 cannot be blown away because it is clumped together. Instead, some of the wet silver nitrate material 7 is turned upward by the centrifugal force generated by the rotation of the hopper 1. At this time, the hot nitrogen gas with a small range and high flow rate can blow away this part of the wet silver nitrate material 7, thereby destroying the dry layer on the surface of the wet silver nitrate material 7.

[0061] Specifically, please refer to Figure 5 In the transfer chamber 51, hot nitrogen gas is blown out along the F3 direction toward the silver nitrate wet material 7 that is turning upward under the action of centrifugal force, so as to blow the part of the silver nitrate wet material 7 that is turning upward toward the F4 direction.

[0062] Specifically, please refer to Figure 6 When concentrated and high-velocity nitrogen gas blows away the silver nitrate wet material 7 that is turned upward under the action of centrifugal force, in order to prevent the silver nitrate wet material 7 from splashing, the second power mechanism 6 drives the arc plate 52 to rotate counterclockwise, and the opening 511 gradually becomes larger from the lower edge to the upper edge. At the same time, the flow rate of nitrogen gas blown out from the opening 511 gradually decreases. Through the fluid pressure effect, the blown silver nitrate wet material 7 can be attracted to deposit at the bottom of the inner cavity 11, which plays the role of concentrating the silver nitrate wet material 7.

[0063] Specifically, please refer to Figure 6In the transfer chamber 51, hot nitrogen gas is blown out along the F4 direction toward the bottom of the inner cavity 11, so that the dispersed wet silver nitrate material 7 is gathered along the F6 direction to the bottom of the inner cavity 11 under the action of fluid pressure.

[0064] Specifically, the second power mechanism 6 drives the arc plate 52 to reciprocate relative to the transfer chamber 51, which can continuously break the dry layer on the surface of the silver nitrate wet material 7 and concentrate the dispersed silver nitrate wet material 7, thereby accelerating the drying of the silver nitrate wet material 7.

[0065] In at least one embodiment, please refer to Figure 4 The transfer compartment 51 is cylindrical, and the arc-shaped plate 52 is attached to the inner wall of the transfer compartment 51.

[0066] Specifically, the arc-shaped plate 52 rotates in contact with the inner wall of the transfer compartment 51, which enables control over the size and direction of the opening 511.

[0067] In at least one embodiment, a first guide plate 53 is provided on the upper edge of the opening 511, and a second guide plate 54 is provided on the arc plate 52. The first guide plate 53 and the second guide plate 54 are arranged in a V-shape to guide hot nitrogen gas to be blown out from between the first guide plate 53 and the second guide plate 54.

[0068] Specifically, the first guide plate 53 also serves to limit the second guide plate 54, preventing the second guide plate 54 from rotating excessively.

[0069] In at least one embodiment, please refer to Figure 1 The second power mechanism 6 includes a rotation drive member 61; the rotation drive member 61 is connected to the arc plate 52 to drive the arc plate 52 to rotate.

[0070] Specifically, the rotation drive 61 is a rotary motor, and the rotating shaft of the rotation drive 61 passes through the liquid passage 31, extends into the transfer chamber 51 through the inner cavity 11, and is connected to the arc plate 52 through the connecting plate 55, thereby driving the arc plate 52 to rotate.

[0071] In at least one embodiment, please refer to Figure 1 The first power mechanism 4 includes: a belt-driven power source 41; the belt-driven power source 41 is connected to the hopper 1 to drive the hopper 1 to rotate.

[0072] Specifically, the belt drive power source 41 consists of a motor, gears, belt, bearing housing, etc., and the hopper 1 is installed on two bearing housings to drive the hopper 1 to rotate.

[0073] Specifically, please refer to Figure 2 The hopper 1 rotates along the F1 direction.

[0074] Specifically, the belt-driven power source 41 drives the hopper 1 to rotate along the F1 direction. By turning over the wet material inside the hopper 1, the wet material is continuously turned over and comes into contact with the inner wall of the inner cavity 11 to conduct heat and dry the wet material.

[0075] In at least one embodiment, the hopper 1 is provided with a jacket 13 to separate an inner cavity 11 and an outer cavity 12 within the hopper 1.

[0076] Based on the same technical concept, at least one embodiment also provides a silver nitrate drying method as described above, which includes: putting silver nitrate wet material 7 into the inner cavity 11, evacuating the inner cavity 11 and blowing hot nitrogen into the blowing adjustment mechanism 5, and circulating and pumping the heat source into the outer cavity 12, while driving the hopper 1 to rotate, so as to dry the silver nitrate wet material 7 in the inner cavity 11; driving the arc plate 52 in the blowing adjustment mechanism 5 to reciprocate relative to the transfer chamber 51, so as to adjust the direction and flow rate of hot nitrogen blown out from the opening 511 on the transfer chamber, and when the arc plate 52 rotates clockwise, the opening 511 gradually closes along the rotation direction and the flow rate of nitrogen blown out from the opening 511 gradually increases, so as to disperse the silver nitrate wet material 7 that is turned up under the action of centrifugal force.

[0077] In summary, this invention transfers heat from the outer cavity to the inner cavity through a heat source mechanism, while the air path mechanism directly injects heat into the inner cavity through a blowing adjustment mechanism, achieving bidirectional heat conduction to improve drying efficiency. Since the hopper is designed with a double cone, the silver nitrate wet material that is turned upward under centrifugal force can only be dispersed when the hot nitrogen is blown out of the non-cone direction of the hopper by adjusting the blowing adjustment mechanism and the blowing velocity is strong. If the hot nitrogen is continuously blown out after breaking the dry layer on the surface of the silver nitrate wet material, it will cause the silver nitrate wet material to splash. By using a second power mechanism in conjunction with the blowing adjustment mechanism to repeatedly adjust the blowing direction and blowing velocity of the hot nitrogen, it is possible to ensure that the dry layer on the surface of the silver nitrate wet material is broken, while avoiding the problem of silver nitrate wet material splashing after breaking the dry layer. That is, it overcomes the problem that the internal heat and mass transfer path is lengthened after the formation of a dry layer on the surface of the silver nitrate wet material, which affects the drying efficiency and drying time.

[0078] In the description of the embodiments of the present invention, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "linking" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in the present invention based on the specific circumstances.

[0079] In the description of this invention, it should be noted that the terms "center," "upper," "lower," "left," "right," "vertical," "horizontal," "inner," and "outer," etc., indicating orientation or positional relationships based on the orientation or positional relationships shown in the accompanying drawings, are only for the convenience of describing the invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of the invention. Furthermore, terms such as "first," "second," and other numerical terms used herein do not imply order or sequence unless expressly indicated herein. Therefore, without departing from the teachings of the exemplary embodiments, the first element, component, region, layer, or segment discussed above may be referred to as a second element, component, region, layer, or segment.

[0080] Spatially relative terms, such as “inside,” “outside,” “below,” “below,” “down,” “above,” “up,” etc., may be used herein to describe the relationship between one element or feature illustrated in the figures and another element or feature. In addition to the orientations depicted in the figures, spatially relative terms may be intended to cover different orientations of the device in use or operation. For example, if the device in the figure is flipped, an element described as “below” or “below” other elements or features would be oriented as “above” other elements or features. Thus, the example term “below” can cover both above and below orientations. The device may be oriented in other ways (rotated 90 degrees or in other orientations), and the spatially relative descriptors used herein are interpreted accordingly.

[0081] In the above discussion, unless otherwise stated, when used to describe numerical values, the terms “about,” “approximately,” “basically,” etc., indicate a change of + / - 10% in that value.

[0082] Based on the above-described preferred embodiments of the present invention, and through the foregoing description, those skilled in the art can make various changes and modifications without departing from the inventive concept. The technical scope of this invention is not limited to the contents of the specification, but must be determined according to the scope of the claims.

Claims

1. A double-cone vacuum dryer, characterized in that, include: The components include: a hopper (1), an air supply mechanism (2), a heat source mechanism (3), a first power mechanism (4), an air blowing adjustment mechanism (5), and a second power mechanism (6); among which... The air passage mechanism (2) is connected to the inner cavity (11) of the silo (1), the heat source mechanism (3) is connected to the outer cavity (12) of the silo (1), and the first power mechanism (4) is connected to the silo (1). The blowing adjustment mechanism (5) is located in the inner cavity (11), the blowing adjustment mechanism (5) is connected to the air passage mechanism (2), and the second power mechanism (6) is movably connected to the blowing adjustment mechanism (5); When silver nitrate wet material (7) is put into the inner cavity (11), the gas path mechanism (2) evacuates the inner cavity (11) and blows hot nitrogen into the blowing adjustment mechanism (5), the heat source mechanism (3) pumps the heat source into the outer cavity (12) in a cycle, and the first power mechanism (4) drives the hopper (1) to rotate to dry the silver nitrate wet material (7) in the inner cavity (11). The second power mechanism (6) drives the arc plate (52) in the blowing adjustment mechanism (5) to rotate back and forth relative to the transfer chamber (51) to adjust the direction and flow rate of hot nitrogen gas blown out from the opening (511) on the transfer chamber (51); When the arc plate (52) rotates clockwise, the opening (511) gradually closes and the flow rate of nitrogen gas blown out from the opening (511) gradually increases, so as to disperse the wet silver nitrate material (7) that is turned up under the action of centrifugal force. When the arc plate (52) rotates counterclockwise, the opening (511) gradually opens and the flow rate of nitrogen gas blown out from the opening (511) gradually decreases. The fluid pressure attracts the dispersed wet silver nitrate material (7) to concentrate at the bottom of the inner cavity (11). The air blowing adjustment mechanism (5) includes: a transfer chamber (51) and an arc plate (52); The air passage (22) in the air passage mechanism (2) is connected to the transfer chamber (51), the arc plate (52) is located inside the transfer chamber (51), and the arc plate (52) is movably connected to the second power mechanism (6); The transit compartment (51) has an opening (511) and the opening (511) is located on the moving path of the arc plate (52); The second power mechanism (6) drives the arc plate (52) to reciprocate relative to the transfer chamber (51) to adjust the direction and flow rate of hot nitrogen gas blown out from the opening (511); The transfer compartment (51) is cylindrical, and the arc-shaped plate (52) is attached to the inner wall of the transfer compartment (51); A first guide plate (53) is provided on the upper edge of the opening (511), and a second guide plate (54) is provided on the arc plate (52). The first guide plate (53) and the second guide plate (54) are arranged in a figure-eight shape to guide hot nitrogen gas to be blown out from between the first guide plate (53) and the second guide plate (54).

2. The double-cone vacuum dryer as described in claim 1, characterized in that, The gas path mechanism (2) includes: a gas extraction pipeline (21) and a vacuum pump; The air extraction pipe (21) is connected to the inner cavity (11); The evacuation line (21) is connected to a vacuum pump to evacuate the inner cavity (11).

3. The double-cone vacuum dryer as described in claim 2, characterized in that, The gas circuit mechanism (2) includes: an inflation pipeline (22) and a nitrogen pump; The inflation tube (22) extends into the inner cavity (11) and is connected to the inflation adjustment mechanism (5); The inflation line (22) is connected to a nitrogen pump to charge heated nitrogen into the inflation adjustment mechanism (5).

4. The double-cone vacuum dryer as described in claim 1, characterized in that, The heat source mechanism (3) includes: a liquid pipeline (31) and a heat source pump (32); The liquid-conducting pipeline (31) is connected to the outer cavity (12); The liquid-passing pipeline (31) is connected to the heat source pump (32) to circulate and pump the heat source into the outer cavity (12).

5. The double-cone vacuum dryer as described in claim 1, characterized in that, The second power mechanism (6) includes: a rotation drive (61); The rotation drive (61) is connected to the arc plate (52) to drive the arc plate (52) to rotate.

6. The double-cone vacuum dryer as described in claim 1, characterized in that, The first power mechanism (4) includes: a belt-driven power source (41); The belt drive power source (41) is connected to the hopper (1) to drive the hopper (1) to rotate.

7. The double-cone vacuum dryer as described in claim 1, characterized in that, The hopper (1) is provided with a jacket (13) to separate the inner cavity (11) and the outer cavity (12) within the hopper (1).

8. A method for drying silver nitrate using a double-cone vacuum dryer as described in any one of claims 1-7, characterized in that, include: Silver nitrate wet material (7) is put into the inner cavity (11), the inner cavity (11) is evacuated and hot nitrogen is blown into the blowing adjustment mechanism (5), and the heat source is pumped into the outer cavity (12) in a cycle. At the same time, the hopper (1) is driven to rotate to dry the silver nitrate wet material (7) in the inner cavity (11). The arc plate (52) in the driving air blowing adjustment mechanism (5) rotates back and forth relative to the transfer chamber (51) to adjust the direction and flow rate of hot nitrogen gas blown out from the opening (511) on the transfer chamber. When the arc plate (52) rotates clockwise, the opening (511) gradually closes and the flow rate of nitrogen gas blown out from the opening (511) gradually increases, so as to disperse the wet silver nitrate material (7) that is turned up under the action of centrifugal force.

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