Distillation device suitable for separating materials

Abstract

The embodiment of the invention relates to the technical field of distillation separation, in particular to a distillation device suitable for separating materials, the distillation device comprises an outer shell and an inner shell, the outer shell forms a closed space, and the inner shell is arranged in the outer shell; the distillation part is arranged in the inner shell, materials are evaporated in the distillation part, and the evaporated materials are condensed in the inner shell; the collecting assembly is arranged in the outer shell and is arranged to collect condensate flowing down from the inner shell; and the heating assembly is arranged to heat the distillation piece, and the heat of the distillation piece is isolated from the inner shell, so that a cavity formed by the inner shell is prevented from being heated by the heating assembly. According to the embodiment of the invention, the inner shell for condensing the evaporated material is arranged in the sealed outer shell, so that the surface area of material condensation is increased, the condensation rate of the material is improved, and meanwhile, the heating assembly for only heating the distillation piece is arranged, so that the heat transmission efficiency in the inner shell is improved, and the distillation efficiency of the material is improved.

Description

Technical Field

[0001] The embodiments of the present application relate to the technical field of distillation separation, and in particular to a distillation device suitable for separating materials. Background Art

[0002] The statements herein merely provide background information related to the present application and do not necessarily constitute prior art.

[0003] With the gradual deepening of nuclear power research, in order to achieve the sustainable development of nuclear power energy, many studies have been carried out on the treatment of spent fuel produced by nuclear power reactors. At present, the post-processing methods of spent fuel include water method and dry method. Among them, the dry method is suitable for the treatment of deep-burnup spent fuel, and has the advantages of radiation resistance, compact equipment, low criticality risk, nuclear non-proliferation and less radioactive waste.

[0004] Vacuum distillation technology is a physical separation method, which is widely used in the dry reprocessing process of spent fuel. Vacuum distillation technology has the advantages of clear principle, simple process, easy process control, and no new radioactive waste. At present, the existing vacuum distillation device still has the problem of low distillation efficiency. Summary of the invention

[0005] A brief overview of the present application is provided below in order to provide a basic understanding of certain aspects of the present application. It should be understood that this overview is not an exhaustive overview of the present application. It is not intended to identify the key or important parts of the present application, nor is it intended to limit the scope of the present application. Its purpose is merely to present certain concepts in a simplified form as a prelude to a more detailed description discussed later.

[0006] An embodiment of the present application provides a distillation device suitable for separating materials, the distillation device comprising: an outer shell and an inner shell, the outer shell forming a closed space, the inner shell being arranged inside the outer shell; a distillation element, the distillation element being arranged inside the inner shell, the material being evaporated inside the distillation element, and the evaporated material being condensed in the inner shell; a collecting component, the collecting component being arranged inside the outer shell and configured to collect condensate flowing down from the inner shell; a heating component, the heating component being configured to heat the distillation element and to isolate its heat from the inner shell to prevent the cavity formed by the inner shell from being heated by the heating component.

[0007] The embodiment of the present application increases the surface area of ​​material condensation and improves the condensation rate of the material by setting an inner shell for condensing the evaporated material inside the sealed outer shell, and effectively reduces the difficulty of sealing the distillation device by sealing only the outer shell. At the same time, the inner shell isolates the evaporated material from the outer shell, preventing the material from corroding the outer shell, thereby extending the service life of the outer shell. In addition, a heating component is set up to heat only the distillation part, which effectively increases the temperature difference between the evaporated material and the inner shell, thereby improving the heat transfer efficiency inside the inner shell and further improving the distillation efficiency of the material. BRIEF DESCRIPTION OF THE DRAWINGS

[0008] Other objects and advantages of the present application will become apparent from the following description of the embodiments of the present application with reference to the accompanying drawings, and will help to provide a comprehensive understanding of the present application.

[0009] Figure 1 is a schematic diagram of a distillation apparatus according to an embodiment of the present application.

[0010] It should be noted that the drawings are not necessarily drawn to scale, but are merely shown in a schematic manner that does not affect the reader's understanding.

[0011] Description of reference numerals:

[0012] 1. Distillation unit;

[0013] 10. Shell;

[0014] 20. Inner shell; 21. Top wall; 22. Cylinder wall;

[0015] 30. Distillation parts;

[0016] 40. Collection component; 41. Collection member; 42. Guide member;

[0017] 50, heating component; 51, heating component; 511, induction coil; 512, heating graphite; 52, temperature isolation component; 521, insulation component; 522, bracket; 5221, support part; 5222, connection part;

[0018] 60. Cooling parts;

[0019] 70. Heating element;

[0020] 80. weighing assembly; 81. weighing shell; 811. weighing cavity; 812. channel; 82. weighing piece. DETAILED DESCRIPTION

[0021] Exemplary embodiments of the present application will be described below in conjunction with the accompanying drawings. For the sake of clarity and conciseness, not all features of the actual implementation are described in the specification. However, it should be understood that many implementation-specific decisions must be made in the process of developing any such actual implementation in order to achieve the developer's specific goals, such as meeting those constraints related to the system and business, and these constraints may vary from implementation to implementation. In addition, it should be understood that although the development work may be very complex and time-consuming, it is only a routine task for those skilled in the art who benefit from the content of this application.

[0022] It is also necessary to explain here that, in order to avoid obscuring the present application due to unnecessary details, only the device structure and / or processing steps closely related to the scheme according to the present application are shown in the accompanying drawings, while other details that are not very relevant to the present application are omitted.

[0023] The inventors of the present application have discovered that existing distillation devices generally have the problem of low distillation efficiency due to low heat transfer efficiency inside the device and low steam condensation efficiency.

[0024] Based on this, an embodiment of the present application provides a distillation device suitable for separating materials. Figure 1 Schematic diagram of a distillation apparatus according to an embodiment of the present application. Figure 1 As shown, it includes: an outer shell 10 and an inner shell 20, the outer shell 10 forms a closed space, and the inner shell 20 is arranged inside the outer shell 10; a distillation element 30, the distillation element 30 is arranged in the inner shell 20, the material is evaporated in the distillation element 30, and the evaporated material is condensed in the inner shell 20; a collecting component 40, the collecting component 40 is arranged in the outer shell 10, and is arranged to collect condensate flowing down from the inner shell 20; a heating component 50, the heating component 50 is arranged to heat the distillation element 30, and its heat is isolated from the inner shell 20 to prevent the cavity formed by the inner shell 20 from being heated by the heating component 50.

[0025] The embodiment of the present application increases the surface area of ​​material condensation and improves the condensation rate of the material by arranging the inner shell 20 for condensing the evaporated material inside the sealed outer shell 10, and effectively reduces the sealing difficulty of the distillation device 1 by sealing only the outer shell 10. At the same time, the inner shell 20 isolates the evaporated material from the outer shell 10, preventing the material from corroding the outer shell 10, thereby extending the service life of the outer shell 10. In addition, the heating component 50 that only heats the distillation element 30 is arranged, which effectively increases the temperature difference between the evaporated material and the inner shell 20, thereby improving the heat transfer efficiency inside the inner shell 20, and further improving the distillation efficiency of the material.

[0026] In an embodiment of the present application, the inner shell 20 forms a condensation surface for condensing the distillation material, and by forming a temperature difference with the distillation element 30, the morphology change of the distillation product from gas to liquid is controlled. At the same time, the inner shell 20 can also serve as a protective cover for the outer shell 10 to prevent steam from entering the outer shell 10 from the inner shell 20 and corroding components arranged outside the inner shell 20.

[0027] In some embodiments, the distillation member 30 may be a distillation crucible.

[0028] In some embodiments, the housing 10 may be made of metal. The housing 10 made of metal has good processability and sealing properties to ensure the airtightness of the distillation device 1 .

[0029] like Figure 1 As shown, the heating component 50 includes a heating component 51 and a temperature isolation component 52. The heating component 51 is configured to heat the distillation component 30 so that the material in the distillation component 30 is evaporated; the temperature isolation component 52 is configured to isolate the heat generated by the heating component 51 from the inner shell 20 to prevent the cavity formed by the inner shell 20 from being heated.

[0030] In the embodiment of the present application, the heating component 51 cooperates with the temperature isolation component 52 to prevent the heating component 51 from radiating heat to the cavity formed by the inner shell 20 while heating the distillation component 30, so that the heat generated by the heating component 51 is concentrated on the distillation component 30, thereby improving the heating efficiency of the heating component 51 on the distillation component 30, and further improving the distillation efficiency of the heating component 51 on the material.

[0031] like Figure 1 As shown, the heating component 51 includes an induction coil 511 and a heating graphite 512. The induction coil 511 is arranged between the outer shell 10 and the inner shell 20. The heating graphite 512 is arranged on the radial outside of the distillation element 30. The induction coil 511 generates an induced magnetic field. The induced magnetic field interacts with the heating graphite 512 to make the heating graphite 512 generate heat, and the heat heats the distillation element 30. The temperature isolation component 52 is configured to isolate the heat generated by the heating graphite 512 from the inner shell 20 to prevent the cavity formed by the inner shell 20 from being heated.

[0032] In the embodiment of the present application, by arranging the heating graphite 512 which only heats the distillation element 30 in the cavity formed by the inner shell 20, the working temperature of the inner shell 20 is reduced, which provides more possibilities for the selection of the material of the inner shell 20, and is conducive to extending the service life of the inner shell 20. In addition, by arranging the heating graphite 512 directly on the radial outer side of the distillation element 30, the heat transfer path between the heating graphite 512 and the distillation element 30 is shortened, thereby improving the heating efficiency of the heating graphite 512 on the distillation element 30 and the material. At the same time, the induction coil 511 which provides a heat source for the heating graphite 512 is arranged between the outer shell 10 and the inner shell 20 to prevent the evaporated material from entering the outer shell 10 and avoid corrosion to the induction coil 511, thereby improving the stability of the device in long-term use.

[0033] In some embodiments, the heating graphite 512 may be in direct contact with the distillation element 30 , thereby further improving the heating efficiency of the heating graphite 512 on the distillation element 30 and the material.

[0034] In some embodiments, the inner shell 20 may be made of a non-conductive material to prevent the induction coil 511 disposed between the outer shell 10 and the inner shell 20 from heating the inner shell 20. For example, the material of the inner shell 20 may be a non-conductive material such as corundum, boron nitride, quartz, etc.

[0035] like Figure 1 As shown, the temperature isolation assembly 52 includes a heat preservation member 521 and a bracket 522 , and the distillation member 30 , the heat preservation member 521 and the heating graphite 512 are arranged on the bracket 522 ; the heating graphite 512 and the distillation member 30 are arranged on the radial inner side of the heat preservation member 521 .

[0036] In the embodiment of the present application, during the process of material distillation, the cavity formed by the inner shell 20 is in a vacuum state, and heat is mainly dissipated in the form of heat radiation. By arranging a heat preservation member 521 outside the heating graphite 512, the heat generated by the heating graphite 512 is concentrated on the distillation member 30, effectively blocking the external heat radiation of the heating graphite 512, reducing heat loss, and maintaining the distillation member 30 at the temperature required for distilling the material. At the same time, the bracket 522 is used to support the distillation member 30, the heat preservation member 521 and the heating graphite 512, preventing the heating graphite 512 from contacting the distillation member 30 and the inner shell 20 and the outer shell 10, thereby reducing heat loss and preventing the high-temperature heating graphite 512 and the distillation member 30 from causing damage or deformation to the outer shell 10.

[0037] In some embodiments, the thermal insulation component 521 may be a thermal insulation layer of a multi-layer baffle structure, which may reflect and scatter the heat radiated outward by the heated graphite 512 to avoid the heat generated by the heated graphite 512 being lost in the form of thermal radiation and concentrate the heat toward the distillation component 30.

[0038] In some embodiments, the heat-insulating member 521 may be made of ceramic.

[0039] In some embodiments, the bracket 522 may include: a support portion 5221 and a connection portion 5222. The support portion 5221 is used to support the distillation element 30, the heat preservation element 521 and the heating graphite 512. The connection portion 5222 is connected to the support portion 5221, and the support portion 5221 is located at the upper part of the cavity formed by the inner shell 20 to shorten the transmission distance of the steam formed by the material and improve the distillation efficiency. The connection portion 5222 and the support portion 5221 can be coaxially arranged with the inner shell 20, and the radial dimension of the connection portion 5222 can be smaller than the radial dimension of the support portion 5221.

[0040] like Figure 1 As shown, the inner shell 20 includes a top wall 21 and a cylinder wall 22 , which are connected to each other to prevent evaporated materials from entering the gap between the inner shell 20 and the outer shell 10 ; the evaporated materials are condensed on the top wall 21 and the cylinder wall 22 .

[0041] In the embodiment of the present application, the top wall 21 and the cylinder wall 22 are connected to each other to form a condensation wall for condensing the evaporated material. At the same time, the top wall 21 and the cylinder wall 22 are connected to each other to prevent the evaporated material from entering the gap between the inner shell 20 and the outer shell 10, so as to avoid corrosion to the heating element 70, the induction coil 511 and the outer shell 10.

[0042] In some embodiments, the induction coil 511 is disposed in the gap between the cylinder wall 22 and the outer shell 10, and the distribution range of the induction coil 511 in the vertical direction covers the heated graphite 512, so that the heated graphite 512 is in the induced magnetic field generated by the induction coil 511, so as to ensure the induction effect of the induced magnetic field on the heated graphite 512, thereby improving the heating efficiency of the heated graphite 512.

[0043] like Figure 1 As shown, the collecting assembly 40 includes a collecting member 41 and a guide member 42. The collecting member 41 is respectively arranged at the bottom of the cylinder wall 22 to collect the condensate flowing down from the cylinder wall 22; the guide member 42 is arranged on the radial inner side of the cylinder wall 22 and is configured to guide the condensate so that the condensate flows into the collecting member 41.

[0044] In the embodiment of the present application, the guide member 42 is provided so that the condensate condensed on the guide member 42 can flow into the collecting member 41 , which is beneficial to improving the condensation efficiency and the collection efficiency.

[0045] like Figure 1 As shown, the guide member 42 is disposed on the bracket 522 and extends toward the collecting member 41 . The condensate condensed on the guide member 42 can flow toward the collecting member 41 and flow into the collecting member 41 .

[0046] In some embodiments, the guide member 42 is disposed on the connecting portion 5222 of the bracket 522, and the steam flowing downward along the inner shell 20 and the supporting portion 5221 can condense on the guide member 42 to form condensate, and flow into the collecting member 41 along the guide member 42, thereby further improving the collection rate of the condensate.

[0047] In some embodiments, the guide member 42 may be a truncated cone-shaped guide plate, which extends toward the collecting member 41 to just above the collecting member 41 , so that the condensate guided by the guide plate can flow smoothly into the collecting member 41 , thereby ensuring the centralized collection of the condensate.

[0048] In some embodiments, the collecting member 41 may be an annular crucible. The cross section of the collecting member 41 may be an inverted trapezoid to increase the collecting area.

[0049] like Figure 1 As shown, the distillation device 1 further comprises a cooling member 60 , which is disposed on the housing 10 and at a height corresponding to the collecting member 41 in the vertical direction.

[0050] In an embodiment of the present application, the cooling element 60 is vertically arranged at a height corresponding to the collecting element 41, which can reduce the temperature of the collecting element 41 and facilitate the condensation process of the evaporated material at the collecting element 41, thereby improving the collection efficiency of the condensate.

[0051] In some embodiments, the cooling element 60 may be provided on the housing 10 in the form of a water cooling patch to prevent the coolant from flowing into the interior of the housing 10 when the cooling element 60 is damaged.

[0052] In some embodiments, a cooling element 60 may be disposed at the bottom of the lower surface and the side surface of the housing 10 to better reduce the temperature of the collecting element 41 .

[0053] like Figure 1 As shown, the distillation device 1 also includes a heating element 70, which is arranged between the outer shell 10 and the inner shell 20 and is arranged in the vertical direction at a height corresponding to the guide member 42, so as to heat the space of the inner shell 20 where the guide member 42 is located, so as to prevent the condensate on the guide member 42 from solidifying due to the low temperature of the space of the inner shell 20 where the guide member 42 is located (lower than the melting point of the distilled material), thereby ensuring the smooth collection of the condensate guided on the guide member 42.

[0054] In some embodiments, the heating element 70 is configured to heat the space of the inner shell 20 where the guide member 42 is located when the temperature of the space of the inner shell 20 where the guide member 42 is located is lower than the melting point of the distilled material, so that the temperature of the space in the lower part of the inner shell 20 is higher than the melting point of the material, thereby preventing the condensate from solidifying on the surface of the guide member 42 and the cylinder wall 22.

[0055] like Figure 1 As shown, the distillation device 1 also includes a weighing component 80, which is arranged on the outside of the inner shell 20 and is configured to weigh the weight of the distillation component 30, so as to determine the weight change of the distillation component 30 based on the weighed weight of the distillation component 30 and judge the start and end of the distillation process.

[0056] In some embodiments, the weighing assembly 80 includes a weighing element 82 and a weighing shell 81. The weighing shell 81 forms a weighing cavity 811 for arranging the weighing element 82, and the weighing shell 81 is connected to the housing 10 so that the weighing cavity 811 communicates with the closed space formed by the housing 10. The weighing element 82 is arranged in the weighing shell 81 so that the closed space formed by the housing remains sealed.

[0057] In some embodiments, the connecting portion 5222 of the bracket 522 is used to connect the weighing element 82 and the supporting portion 5221 , so as to use the weighing element 82 to weigh the distillation element 30 supported by the supporting portion 5221 .

[0058] In some embodiments, the weighing shell 81 further forms a channel 812 communicating with the weighing chamber 811, and an opening is formed at the bottom of the housing 10, the opening is located radially inward of the collecting member 41, and the weighing chamber 811 communicates with the opening formed by the housing 10 through the channel 812, and the size of the channel is slightly larger than the connecting portion 5222 to allow the connecting portion 5222 to pass through. In such an embodiment, the arrangement of the weighing shell 81 can better avoid the thermal shock of hot steam on the weighing member 82, thereby better protecting the weighing member 82 and ensuring the weighing accuracy of the weighing member 82.

[0059] In some embodiments, the weighing element 82 is configured to record the weight change of the distillation element 30 in real time, so as to determine the distillation stage and distillation efficiency of the distillation process according to the weight change of the distillation element 30 .

[0060] The method for separating materials using the distillation device 1 of the present invention is described below with reference to specific embodiments.

[0061] After placing the material in the distillation element 30 and closing the outer shell 10, the cooling element 60 is turned on to cool the space of the outer shell 10 where the collecting element 41 is located. The weighing element 82 is turned on to record the weight of the distillation element 30 in real time. The induction coil 511 is energized, and the induction coil 511 generates an induced magnetic field to inductively heat the graphite 512. The heated graphite 512 generates heat to heat the distillation element 30. The material evaporates in the distillation element 30, and the evaporated material can condense on the inner shell 20 and the guide member 42 to form a condensate. The collecting element 41 collects the condensate condensed on the inner shell 20 and the guide member 42.

[0062] A temperature sensor is used to measure the temperature of the lower space of the inner shell 20. When the temperature of the lower space of the inner shell 20 is lower than a preset threshold, the heating element 70 is turned on. The heating element 70 heats the space of the inner shell 20 where the guide member 42 is located, so that the temperature of the space of the inner shell 20 where the guide member 42 is located is higher than the melting point of the material, thereby preventing the condensate on the guide member 42 and the inner shell 20 from solidifying.

[0063] According to the weight change of the distillation element 30, the distillation stage and the distillation efficiency of the distillation process are determined.

[0064] The distillation efficiency of metal cadmium in the distillation apparatus 1 of the present application and in a conventional distillation apparatus are compared in the form of examples.

[0065] The metallic cadmium which is not completely distilled within 1 hour is prepared and placed in the distillation part 30 of the present application.

[0066] The working parameters of the induction coil 511 are set so that the heating temperature of the heated graphite 512 is 600° C. and the heating time is 1 hour; the pressure of the cavity formed by the inner shell 20 is 10Pa.

[0067] The induction coil 511 and the weighing element 82 are turned on to record the weight change of the distillation element 30 and the distillation time of the metal cadmium.

[0068] After the weight of the distillation part 30 is stabilized, the distillation time of the metal cadmium is determined. After the distillation is completed, the collecting part 41 is taken out and the weight of the condensate therein is measured. The distillation efficiency of the metal cadmium is determined based on the distillation time of the metal cadmium and the weight of the condensate.

[0069] Repeat the above steps several times to determine the range of the distillation efficiency of metal cadmium and the average distillation efficiency of metal cadmium, wherein the range of the distillation efficiency of metal cadmium is 18.75-23.16 g / (h·cm 2 ), the average distillation efficiency is 20g / (h·cm 2 ).

[0070] The distillation efficiency of cadmium metal was determined by performing multiple distillations under the same experimental conditions in a common distillation apparatus. The range of distillation efficiency of cadmium metal and the average distillation efficiency of cadmium metal were determined. The range of distillation efficiency of cadmium metal was 9.6-10.4 g / (h·cm 2 ), the average distillation efficiency is 10g / (h·cm 2 ).

[0071] According to the test results of the distillation device 1 of the present application and the common distillation device, it is determined that the distillation efficiency of the distillation device 1 of the present application is twice that of the common distillation device.

[0072] The distillation efficiency of LiCl-KCl molten salt in the distillation device 1 of the present application and in a conventional distillation device are compared in the form of examples.

[0073] A LiCl-KCl molten salt that is not completely distilled within 1 hour is prepared and placed in the distillation part 30 of the present application.

[0074] The working parameters of the induction coil 511 are set so that the heating temperature of the heated graphite 512 is 900° C. and the heating time is 1 hour; the pressure of the cavity formed by the inner shell 20 is 10Pa.

[0075] The induction coil 511 and the weighing element 82 are turned on to record the weight change of the distillation element 30 and the distillation time of the LiCl-KCl molten salt.

[0076] After the weight of the distillation unit 30 is stabilized, the distillation time of the LiCl-KCl molten salt is determined. After the distillation is completed, the collecting unit 41 is taken out and the weight of the condensate therein is measured. The distillation efficiency of the LiCl-KCl molten salt is determined based on the distillation time of the LiCl-KCl molten salt and the weight of the condensate.

[0077] Repeat the above steps several times to determine the range of distillation efficiency of LiCl-KCl molten salt and the average distillation efficiency of LiCl-KCl molten salt. The average distillation efficiency of LiCl-KCl molten salt is 14.3 / (h·cm 2 ).

[0078] In a common distillation apparatus, multiple distillations were carried out under the same experimental conditions to determine the range of distillation efficiency of LiCl-KCl molten salt and the average distillation efficiency of LiCl-KCl molten salt. The average distillation efficiency of LiCl-KCl molten salt is 5.2 g / (h·cm 2 ).

[0079] According to the test results of the distillation device 1 of the present application and the common distillation device, it is determined that the distillation efficiency of the distillation device 1 of the present application is 2.75 times that of the common distillation device.

[0080] Regarding the embodiments of the present application, it should also be noted that, in the absence of conflict, the embodiments of the present application and the features therein can be combined with each other to obtain new embodiments.

[0081] The above description is only a specific implementation manner of the present application, but the protection scope of the present application is not limited thereto. The protection scope of the present application shall be based on the protection scope of the claims.

Claims

1. A distillation apparatus suitable for separating materials, characterized in that: It includes: An outer shell and an inner shell, wherein the outer shell forms a closed space and the inner shell is arranged inside the outer shell; A distillation element, wherein the distillation element is disposed in the inner shell, wherein the material is evaporated in the distillation element, and the evaporated material is condensed in the inner shell; A collecting assembly, the collecting assembly is disposed in the outer shell and is configured to collect condensate flowing down from the inner shell; A heating component is configured to heat the distillation element and isolate its heat from the inner shell to prevent the cavity formed by the inner shell from being heated by the heating component.

2. The distillation apparatus according to claim 1, characterized in that The heating component includes a heating component and a temperature isolation component. The heating component is configured to heat the distillation element so that the material in the distillation element is evaporated; The temperature isolation component is configured to isolate the heat generated by the heat generating component from the inner shell to prevent the cavity formed by the inner shell from being heated.

3. The distillation apparatus according to claim 2, characterized in that The heating component includes an induction coil and heating graphite, and the induction coil is arranged between the outer shell and the inner shell; The heating graphite is arranged radially outside the distillation element, the induction coil generates an induction magnetic field, the induction magnetic field interacts with the heating graphite to make the heating graphite generate heat, and the heat heats the distillation element; The temperature isolation component is configured to isolate the heat generated by the heated graphite from the inner shell to prevent the cavity formed by the inner shell from being heated.

4. The distillation apparatus according to claim 3, characterized in that The temperature isolation assembly includes a heat preservation component and a bracket. The distillation element, the heat preservation element and the heating graphite are arranged on the bracket; The heating graphite and the distillation element are arranged radially inward of the heat insulation element.

5. The distillation apparatus according to claim 4, characterized in that The inner shell includes a top wall and a cylinder wall, and the top wall and the cylinder wall are connected to each other to prevent the evaporated material from entering the gap between the inner shell and the outer shell; The evaporated material is condensed on the top wall and the cylinder wall.

6. The distillation apparatus according to claim 5, characterized in that The collecting assembly comprises a collecting member and a flow guide member, wherein the collecting member is arranged at the bottom of the cylinder wall to collect the condensate flowing down from the cylinder wall; The guide member is arranged on the radial inner side of the cylinder wall, and is arranged to guide the condensate so that the condensate flows into the collecting member.

7. The distillation apparatus according to claim 6, characterized in that The flow guide is arranged on the bracket and extends toward the collecting member.

8. The distillation apparatus according to claim 6, characterized in that A cooling member is also included, and the cooling member is disposed on the housing and is disposed at a height corresponding to the collecting member in a vertical direction.

9. The distillation apparatus according to claim 6, characterized in that It also includes a heating element, which is arranged between the outer shell and the inner shell and is arranged in the vertical direction at a height corresponding to the guide element to heat the inner shell space where the guide element is located.

10. The distillation apparatus according to any one of claims 1 to 9, characterized in that A weighing assembly is also included, which is arranged outside the inner shell and is configured to weigh the weight of the distillation element.

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