Drying apparatus

Abstract

The application discloses a drying device, which comprises a shell, a cavity in the shell, a first drying part arranged along the axial direction of the shell and used for transferring heat to the solution, and a second drying part extending along the radial direction of the shell and used for transferring heat to the solution. The middle part of the second drying part is provided with a through hole, and the solution flows through the through hole after flowing out from the edge of the first drying part. The drying device can increase the heat exchange area of the solution and improve the crystallization efficiency.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of solution concentration and drying, and particularly relates to a drying device. BACKGROUND

[0002] Evaporation refers to a process of gradually concentrating solute by heating and boiling solvent in solution, so that the solvent is evaporated. In modern industrial production and daily life, evaporation and concentration are common, and evaporation and crystallization equipment is widely used.

[0003] In the related art, the heat exchange efficiency of the evaporation and crystallization equipment is low, which leads to low evaporation efficiency of the solvent, thereby reducing the crystallization efficiency of the solute and affecting the production. SUMMARY

[0004] The present application aims to at least solve one of the technical problems in the prior art. To this end, the present application provides a drying device capable of accelerating the evaporation efficiency of the solvent.

[0005] The drying device according to the first aspect of the present application comprises: a shell having a cavity for introducing a solution; a first drying member extending along the radial direction of the shell for transferring heat to the solution; and a second drying member extending along the radial direction of the shell for transferring heat to the solution, wherein a through hole is formed in the middle of the second drying member, and the solution flows through the through hole after flowing out of the edge of the first drying member.

[0006] The drying device according to the present application has at least the following beneficial effects: by providing the first drying member and the second drying member, and forming a through hole in the middle of the second drying member for the solution to pass through, the solution introduced into the cavity of the shell flows through the through hole in the middle of the second drying member after flowing out of the edge of the first drying member, thereby forming a circulation process from the inside to the outside on the first drying member and the second drying member in the cavity of the shell. Since the first drying member and the second drying member are used to transfer heat to the solution, the solution can be heated in circulation. The arrangement of the first drying member and the second drying member increases the heat exchange area with the solution, increases the heat exchange efficiency, promotes the evaporation of the solvent, and thus accelerates the crystallization of the solute.

[0007] According to some embodiments of the present application, the first drying member is formed with a first flow channel, the second drying member is formed with a second flow channel, and the drying device further comprises a heating mechanism for generating a hot fluid flowing through the first flow channel and the second flow channel, respectively.

[0008] According to some embodiments of the present application, the drying device further comprises a first main pipe for the hot fluid to flow into the cavity, a second main pipe for the hot fluid to flow out of the cavity, and a plurality of branch pipes connected between the first main pipe and the second main pipe, each of the branch pipes being connected to the first flow channel and the second flow channel.

[0009] According to some embodiments of the present application, the branch pipes are coiled in the first flow channel and the second flow channel.

[0010] According to some embodiments of the present application, the drying device further comprises a rotating shaft located in the cavity and driven to rotate by a driving member, the first drying member surrounds the rotating shaft, the rotating shaft passes through the through hole, and the drying device further comprises a first scraping mechanism driven to rotate by the rotating shaft for scraping the surfaces of the first drying member and the second drying member.

[0011] According to some embodiments of the present application, the first scraping mechanism comprises a first set of scraping members for scraping the surface of the first drying member and a second set of scraping members for scraping the surface of the second drying member.

[0012] According to some embodiments of the present application, the first set of scraping members comprises at least one first scraping member group and at least one second scraping member group, the number of scraping members in the first scraping member group is different from the number of scraping members in the second scraping member group, and the first scraping member group and the second scraping member group are arranged alternately.

[0013] According to some embodiments of the present application, the second set of scraping members comprises at least one third scraping member group and at least one fourth scraping member group, the number of scraping members in the third scraping member group is different from the number of scraping members in the fourth scraping member group, and the third scraping member group and the fourth scraping member group are arranged alternately. According to some embodiments of the present application, the drying device further comprises a cooling member, the bottom of the shell is provided with a discharge port, and the drying device is provided with a cooling liquid at the cooling member to solidify the solute in the solution and discharge the solute from the discharge port.

[0014] According to some embodiments of the present application, the shell is further provided with a second scraping mechanism for scraping the surface of the cooling member.

[0015] Additional aspects and advantages of the present application will be given in part in the following description, become apparent from the following description, or be understood through practice of the present application. BRIEF DESCRIPTION OF DRAWINGS

[0016] The present application will be further described below with reference to the accompanying drawings and embodiments, in which:

[0017] Figure 1 A structural schematic diagram of the drying device of the embodiments of the present application;

[0018] Figure 2 A structural schematic diagram of the drying device of the embodiments of the present application; Figure 1 A flow state of the solution in the drying device of the embodiments of the present application is shown in the reference diagram;

[0019] Figure 3 A top view of the first drying member of the embodiments of the present application is shown in the reference diagram; Figure 1 A top view of the first drying member of the embodiments of the present application is shown in the reference diagram;

[0020] Figure 4 A top view of the second drying member of the embodiments of the present application is shown in the reference diagram; Figure 1 A top view of the second drying member of the embodiments of the present application is shown in the reference diagram;

[0021] Figure 5 A schematic diagram of the hot liquid discharge of the embodiments of the present application is shown in the reference diagram; Figure 1 A schematic diagram of the hot liquid discharge of the embodiments of the present application is shown in the reference diagram;

[0022] Figure 6 A flow direction of the hot liquid in the first drying member of the embodiments of the present application is shown in the reference diagram;

[0023] Figure 7 A flow direction of the hot liquid in the second drying member of the embodiments of the present application is shown in the reference diagram;

[0024] Figure 8 A top view of the cooling member of the embodiments of the present application is shown in the reference diagram. Figure 1

[0025] Reference signs:

[0026] Drying device 100;

[0027] Housing 110, material inlet 111, material inlet pipe 112, exhaust port 113, material outlet 114, cooling liquid inlet 115;

[0028] Rotating shaft 120, mounting shaft 121, elastic member 122;

[0029] First drying member 130, first support member 131, blocking member 132;

[0030] Second drying member 140, through hole 141, second support member 142;

[0031] First scraping mechanism 150, first set of scraping members 151, second set of scraping members 152, first scraping member group 1511, second scraping member group 1512, third scraping member group 1521, fourth scraping member group 1522;

[0032] Driving member 160;

[0033] Cooling member 170; ​

[0034] The second scraping mechanism 180, the fifth scraping piece group 181, and the sixth scraping piece group 182;

[0035] The first main pipe 200 and the branch pipe 210;

[0036] The second main pipe 300. DETAILED DESCRIPTION

[0037] Embodiments of the present application are described in detail below with reference to the attached drawings, which show by way of example embodiments in which like numerals indicate like elements or elements having the same or similar function throughout the several views. The embodiments described below are exemplary only, and are not to be taken in a limiting sense, but the scope of the present application is defined by the appended claims.

[0038] In the description of the present application, it needs to be understood that the orientation description, such as the orientation or position relationship indicated by up, down, front, back, left, right, etc. is based on the orientation or position relationship shown in the drawings, and is only for the convenience of describing the present application and simplifying the description, and therefore cannot be understood as a limitation on the present application.

[0039] In the description of the present application, if the meaning of several is more than one, the meaning of multiple is more than two, greater than, less than, more than, etc. is understood as not including the number, above, below, etc. is understood as including the number. If it is described as first, second, it is only for the purpose of distinguishing technical features, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of indicated technical features or the sequence of indicated technical features.

[0040] In the description of the present application, unless otherwise explicitly limited, the words such as setting, installing, connecting, etc. should be understood in a broad sense, and the person skilled in the art can reasonably determine the specific meaning of the above words in the present application in combination with the specific content of the technical solution.

[0041] In the description of the present application, the description of the terms "one embodiment", "some embodiments", "exemplary embodiment", "example", "specific example", or "some examples" means that the specific features, structures, materials or characteristics described in combination with the embodiment or example are included in at least one embodiment or example of the present application. In the present specification, the exemplary description of the above terms does not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described can be combined in any one or more embodiments or examples in a suitable manner.

[0042] Please refer to Figures 1 to 8The drying device 100 provided in an embodiment of the present application comprises a shell 110, a rotating shaft 120, a first drying member 130, a second drying member 140 and a first scraping mechanism 150.

[0043] Please refer to Figure 1 and Figure 2 The shell 110 has a cavity for the solution to flow into, and the first drying member 130 and the second drying member 140 are located in the cavity. The first drying member 130 is used to transfer heat to the solution and extends along the radial direction of the shell 110. The second drying member 140 also extends along the radial direction of the shell 110 and is used to transfer heat to the solution. The middle part of the second drying member 140 is provided with a through hole 141, and the solution flows through the through hole 141 after flowing out of the edge of the first drying member 130.

[0044] The drying device 100 described above is provided with the first drying member 130 and the second drying member 140, and the middle part of the second drying member 140 is provided with the through hole 141 for the solution to flow through. Therefore, after the solution flows into the cavity of the shell 110, it flows through the through hole 141 in the middle part of the second drying member 140, and a circulation process from the inside to the outside is formed on the first drying member 130 and the second drying member 140 in the cavity of the shell 110. Please refer to Figure 2 In addition, the first drying member 130 and the second drying member 140 are used to transfer heat to the solution, which can heat the solution in circulation, increase the heat exchange area with the solution, increase the heat exchange efficiency, promote the evaporation of the solvent, and thus accelerate the crystallization of the solute.

[0045] Please refer to Figure 1 The top of the shell 110 is provided with a feeding port 111 for the solution to flow into. Specifically, the solution is fed into the cavity of the shell 110 through the feeding pipe 112, so that after the solution is fed into the cavity of the shell 110 through the feeding pipe 112, it can be discharged onto the first drying member 130, and then a circulation process from the inside to the outside can be formed between the first drying member 130 and the second drying member 140.

[0046] In addition, since the solvent in the solution will become gas and evaporate when heated, the top of the shell 110 is also provided with an exhaust port 113 to discharge the gaseous solvent, so as to achieve the effect of separating the solvent from the solute.

[0047] It can be understood that the bottom of the shell 110 is provided with a discharge port 114 to discharge the separated crystalline solute from the discharge port 114, thereby achieving the purpose of evaporation and crystallization.

[0048] Wherein, in one embodiment of the present application, the drying device 100 is further provided with a rotating shaft 120, the rotating shaft 120 is located in the cavity and can be driven to rotate by the driving member 160, the first drying member 130 is arranged outside the rotating shaft 120, the rotating shaft 120 passes through the through hole 141, and the drying device 100 further comprises a first scraping mechanism 150, the first scraping mechanism 150 can be driven to rotate by the rotating shaft 120, so as to scrape the surface of the first drying member 130 and the second drying member 140.

[0049] Specifically, in one embodiment of the present application, the driving member 160 is arranged outside the bottom of the shell 110 and connected with the rotating shaft 120, so as to drive the rotating shaft 120 to rotate. In other embodiments, the driving member 160 can also be arranged at the top of the shell 110.

[0050] Wherein, the driving member 160 in the embodiment is a driving motor.

[0051] Please refer to Figures 1 to 2 In one embodiment of the present application, a plurality of first drying members 130 and a plurality of second drying members 140 are arranged in the shell 110, and the plurality of first drying members 130 and the plurality of second drying members 140 are arranged alternately and spaced from each other from top to bottom, so that the solution forms a circulation process from inside to outside and then from outside to inside, please refer to Figure 2 , increase the heat exchange area, increase the heat exchange efficiency, promote the evaporation of the solvent, so as to accelerate the crystallization of the solute.

[0052] Wherein, the plurality of first drying members 130 are arranged in sequence along the axial direction of the rotating shaft 120, for transferring heat to the solution, the first drying member 130 is annular, and the rotating shaft 120 passes through the first drying member 130, so that the first drying member 130 can be arranged outside the rotating shaft 120.

[0053] Specifically, the first drying member 130 is fixed to the inner wall of the shell 110 by the first support 131. And the annular blocking member 132 is arranged on the first drying member 130, the height of the blocking member 132 is higher than the height of the first drying member 130, and the longitudinal section of the blocking member 132 is trapezoidal, so that when the solution is discharged onto the first drying member 130, the solution is prevented from flowing down from the rotating shaft 120 too much, so that the solution flows out from the outer edge of the first drying member 130, thereby increasing the circulation area of the solution and heat.

[0054] Please refer to Figures 1 to 2 In one embodiment of the present application, the plurality of second drying members 140 are arranged in sequence along the axial direction of the rotating shaft 120, for transferring heat to the solution, the middle part of the second drying member 140 forms a through hole 141, the rotating shaft passes through the through hole 141, and the solution flows through the through hole 141 after flowing out from the edge of the first drying member 130.

[0055] The second drying element 140 is annular and is fixed to the inner wall of the housing 110 by the second support element 142.

[0056] Furthermore, since the second drying element 140 has a through hole 141 for the solution to flow through, the outer edge of the second drying element 140 is closer to the inner wall of the housing 110 than the outer edge of the first drying element 130, thereby enabling the second drying element 140 to have a sufficiently large heat exchange area.

[0057] Please see Figures 1 to 4 In one embodiment of the present invention, the first scraping mechanism 150 can be driven to rotate by the rotating shaft 120, thereby scraping the surfaces of the first drying element 130 and the second drying element 140. This prevents solute from accumulating on the first drying element 130 and the second drying element 140, thus affecting the heat transfer of the solution by the first drying element 130 and the second drying element 140.

[0058] The first scraping mechanism 150 can be used to scrape the surface of all the first drying elements 130 and the second drying elements 140, or it can scrape the surface of a portion of the first drying elements 130 and the second drying elements 140.

[0059] In one embodiment of the present invention, a first scraping mechanism 150 is used to scrape the surfaces of the first drying element 130 and the second drying element 140 disposed in the middle of the housing 110. The first scraping mechanism 150 includes a plurality of scraping elements. In other embodiments, the first scraping mechanism 150 can be configured to scrape the surfaces of all the first drying elements 130 and the second drying elements 140, thereby ensuring that the first drying elements 130 and the second drying elements 140 can provide sufficient heat exchange area for the solution and avoid the accumulation of solute affecting heat transfer.

[0060] Specifically, please refer to Figure 1 and Figure 3 The first scraping mechanism 150 includes a first set of scraping components 151 and a second set of scraping components 152. The first set of scraping components 151 is used to scrape the surface of the first drying component 130, and the second set of scraping components 152 is used to scrape the surface of the second drying component 140.

[0061] Please see Figure 3 The first set of scraping components 151 includes at least one first scraping component group 1511 and at least one second scraping component group 1512. The number of scraping components in the first scraping component group 1511 and the number of scraping components in the second scraping component group 1512 are not equal, and the first scraping component group 1511 and the second scraping component group 1512 are alternately arranged to ensure the cleaning effect on the surface of the first drying component 130 and avoid crystallization and scale accumulation on the first drying component 130.

[0062] Specifically, in one embodiment of the present application, the first group of wipers 1511 is provided with odd number of wipers, and the second group of wipers 1512 is provided with even number of wipers. In other embodiments, the first group of wipers 1511 can be provided with odd number of wipers, and the second group of wipers 1512 can also be provided with odd number of wipers. For example, the first group of wipers 1511 can be provided with three wipers, and the second group of wipers 1512 can be provided with five wipers. Alternatively, the first group of wipers 1511 can be provided with even number of wipers, and the second group of wipers 1512 can also be provided with even number of wipers. For example, the first group of wipers 1511 can be provided with two wipers, and the second group of wipers 1512 can be provided with four wipers. Alternatively, the first group of wipers 1511 and the second group of wipers 1512 can be provided with other number of wipers, which are not limited herein.

[0063] Referring to Figure 4 , the second set of wipers 152 includes at least one third group of wipers 1521 and at least one fourth group of wipers 1522, the number of wipers of the third group of wipers 1521 and the number of wipers of the fourth group of wipers 1522 are not equal, and the third group of wipers 1521 and the fourth group of wipers 1522 are alternately arranged. Thus, the cleaning effect on the surface of the second drying member 140 is ensured, and the crystallization and scale accumulation on the second drying member 140 is avoided.

[0064] Specifically, in one embodiment of the present application, the third group of wipers 1521 is provided with odd number of wipers, and the fourth group of wipers 1522 is provided with even number of wipers. In other embodiments, the third group of wipers 1521 can be provided with odd number of wipers, and the fourth group of wipers 1522 can also be provided with odd number of wipers. For example, the third group of wipers 1521 can be provided with three wipers, and the fourth group of wipers 1522 can be provided with five wipers. Alternatively, the third group of wipers 1521 can be provided with even number of wipers, and the fourth group of wipers 1522 can also be provided with even number of wipers. For example, the third group of wipers 1521 can be provided with two wipers, and the fourth group of wipers 1522 can be provided with four wipers. Alternatively, the third group of wipers 1521 and the fourth group of wipers 1522 can be provided with other number of wipers, which are not limited herein.

[0065] Specifically, referring to Figure 1 , the shaft 120 is provided with a mounting shaft 121, and the wipers are connected with the mounting shaft 121 through the elastic member 122. Since crystallization is formed on the surface of the first drying member 130 and the second drying member 140 during the drying process, the wipers are connected with the mounting shaft 121 through the elastic member 122, so as to avoid the wipers from being stuck during the wiping process.

[0066] Specifically, the elastic member 122 in the present embodiment is a spring.

[0067] Referring to Figure 1 、 Figures 5 to 7 In one embodiment of the present application, the drying device 100 further comprises a heating mechanism (not shown in the figure), the first drying member 130 is formed with a first flow channel, the second drying member 140 is formed with a second flow channel, and the heating mechanism is used to generate a hot fluid flowing through the first flow channel and the second flow channel.

[0068] Specifically, the hot fluid in the present embodiment is steam.

[0069] In the present embodiment, the drying device 100 further comprises a first main pipe 200, a second main pipe 300 and a plurality of branch pipes 210, the first main pipe 200 is used to supply the hot fluid into the cavity of the shell 110, the second main pipe 300 is used to discharge the hot fluid from the cavity of the shell 110, the first main pipe 200 and the second main pipe 300 are connected with the plurality of branch pipes 210, and each of the first flow channel and the second flow channel is connected with one of the branch pipes 210. Thus, the steam is discharged to the branch pipes 210 through the first main pipe 200, and then the heat is transferred into the first drying member 130 and the second drying member 140 through the branch pipes 210, and then the steam is discharged from the second main pipe 300 after being collected, so that the first drying member 130 and the second drying member 140 provide heat to the solution.

[0070] Referring to Figure 6 and Figure 7 Specifically, the branch pipes 210 are in a spiral shape in the first flow channel of the first drying member 130 and in the second flow channel of the second drying member 140, so that the heat is circulated in the first drying member 130 and the second drying member 140, thereby increasing the contact area of the heat and the solution and increasing the heat exchange rate.

[0071] Referring to Figure 1 and Figure 8 In one embodiment of the present application, the drying device 100 further comprises a cooling member 170, the bottom of the shell 110 is provided with a discharge port 114, and the drying device 100 is supplied with a cooling liquid at the cooling member 170, so that the solute in the solution is crystallized and discharged from the discharge port 114.

[0072] It can be understood that the bottom of the shell 110 is further provided with a cooling liquid inlet 115.

[0073] In the present embodiment, the cooling liquid is water, and since water is an environmentally friendly substance, the use of water for cooling can avoid pollution to the environment.

[0074] In addition, it should be noted that, since the solute is condensed and crystallized on the cooling member 170, the shell 110 is further provided with a second scraping mechanism 180 for scraping the surface of the cooling member 170. The second scraping mechanism 180 is driven to rotate by the rotating shaft 120, thereby scraping the surface of the cooling member 170.

[0075] Specifically, the second scraping mechanism 180 includes at least one fifth scraping member group 181 and at least one sixth scraping member group 182, and the fifth scraping member group 181 and the sixth scraping member group 182 are arranged alternately. The number of scraping members arranged on the fifth scraping member group 181 and the sixth scraping member group 182 is not equal, thereby ensuring the scraping effect and avoiding dead angles.

[0076] In an embodiment of the present application, the fifth scraping member group 181 is provided with three scraping members, and the sixth scraping member group 182 is provided with two scraping members. In other embodiments, other numbers of scraping members can be arranged on the fifth scraping member group 181 and the sixth scraping member group 182.

[0077] The above-described drying device 100, the branch pipe 210 is coiled in the first flow channel of the first drying member 130 and in the second flow channel of the second drying member 140, thereby making the hot flow have a large enough heat exchange area with the first drying member 130 and the second drying member 140, and further making the first drying member 130 and the second drying member 140 have a large enough heat exchange area with the solution, increasing the evaporation efficiency of the solvent, thereby accelerating the precipitation and crystallization of the solute and improving the drying efficiency.

[0078] The embodiments of the present application are described in detail above in combination with the drawings, but the present application is not limited to the above-described embodiments, and various changes can be made within the knowledge of those skilled in the art without departing from the purpose of the present application. In addition, the embodiments of the present application and the features in the embodiments can be combined with each other without conflict.

Claims

1. Drying apparatus, characterized in that The drying device comprises: a shell having a cavity for passing a solution; a first drying element extending along a radial direction of the shell for transferring heat to the solution; a second drying element extending along the radial direction of the shell for transferring heat to the solution, a middle portion of the second drying element being formed with a through hole, the solution flowing out of an edge of the first drying element and then flowing through the through hole; a first flow channel is formed in the first drying element, a second flow channel is formed in the second drying element, and the drying device further comprises a heating mechanism for generating a hot fluid flowing through the first flow channel and the second flow channel respectively; the drying device further comprises a first main pipe, a second main pipe and a plurality of branch pipes, the first main pipe being used for passing the hot fluid into the cavity, the second main pipe being used for discharging the hot fluid from the cavity, the first main pipe and the second main pipe being connected by the plurality of branch pipes, and each of the first flow channel and the second flow channel being connected to one of the branch pipes; the branch pipe is in a spiral shape in the first flow channel and in the second flow channel; the branch pipe comprises a first passage and a second passage, the first passage being arranged along a radial direction, the first passage having first and second side walls opposite in a circumferential direction, the first and second drying elements each having first and second partitions, one end of the first partition being connected to the first side wall and the other end of the first partition having a gap with the second side wall; one end of the second partition has a gap with the first side wall and the other end of the second partition is connected to the second side wall, a plurality of the first partitions and a plurality of the second partitions being alternately arranged along an extension direction of the first passage to form the second passage; one end of the first passage is connected to the first main pipe, the other end of the first passage is connected to a portion of the second passage close to a central axis of the first drying element or the second drying element, and the second main pipe is connected to a portion of the second passage close to an outer edge of the first drying element or the second drying element; the drying device further comprises a first scraping mechanism, the first scraping mechanism comprising a first set of scraping elements for scraping a surface of the first drying element; the first set of scraping elements comprises at least one first scraping element group and at least one second scraping element group, the number of scraping elements in the first scraping element group and the number of scraping elements in the second scraping element group being different, and the first scraping element group and the second scraping element group being alternately arranged.

2. The drying apparatus of claim 1, wherein the drying device further comprises a rotating shaft located in the cavity and capable of being driven to rotate by a driving element, the first drying element being arranged outside the rotating shaft, the rotating shaft passing through the through hole, and the first scraping mechanism being capable of being driven to rotate by the rotating shaft for scraping the surfaces of the first drying element and the second drying element.

3. The drying apparatus of claim 2, wherein the first scraping mechanism further comprises a second set of scraping elements for scraping a surface of the second drying element.

4. The drying apparatus of claim 3, wherein The second set of scraping members comprises at least one third scraping member group and at least one fourth scraping member group, the number of scraping members in the third scraping member group is not equal to the number of scraping members in the fourth scraping member group, and the third scraping member group and the fourth scraping member group are arranged alternately.

5. The drying apparatus of claim 1, wherein The drying device further comprises a cooling member, the bottom of the shell is provided with a discharge port, and the drying device is connected to cooling liquid at the cooling member, so that the solute in the solution is crystallized and discharged from the discharge port.

6. The drying apparatus of claim 5, wherein The shell is further provided with a second scraping mechanism, and the second scraping mechanism is used for scraping the surface of the cooling member.

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