Alkali metal distillation and purification device

Abstract

The utility model discloses an alkali metal distillation and purification device which comprises a first glass tube, a first glass distillation flask, a second glass distillation flask and a glass collection container which are communicated in a stepped manner, the upper parts of the inner walls of the first glass distillation flask and the second glass distillation flask are respectively and coaxially provided with an annular part, and an annular flow collecting groove is defined by the annular parts; the top ends of the first glass distillation flask and the second glass distillation flask are conical; an inner cavity at the bottom of the annular flow collecting groove of the first glass distillation flask is communicated with the middle of an inner cavity of the second glass distillation flask; the bottom end of the first glass tube is communicated with the middle part of the inner cavity of the first glass distillation flask; an inner cavity at the bottom of the annular flow collecting groove of the second glass distillation flask is communicated with the top of the inner cavity of the glass collecting container. The alkali metal distillation and purification device disclosed by the utility model can overcome the defect of low distillation efficiency caused by the fact that some liquid drops condensed by cesium (rubidium) steam slide down and need to be heated and evaporated again.

Description

Technical Field

[0001] The utility model relates to the technical field of metal purification devices, in particular to an alkali metal distillation and purification device. Background Art

[0002] High-purity alkali metal cesium (rubidium) is widely used in fields such as atomic frequency standards, magnetometers, and gyroscopes. However, alkali metal cesium (rubidium) has a strong chemical reaction with oxygen and water, so purification is required under high vacuum conditions. Currently, vacuum distillation devices are used for cesium (rubidium) purification in industry or laboratories. The vacuum distillation process includes: heating cesium (rubidium) in a distillation container to make it evaporate, and the cesium (rubidium) vapor enters the collection device through a connecting pipe and condenses into a liquid state.

[0003] The inventor found that some alkali metal cesium (rubidium) vapor will contact the inner wall of the top of the distillation container and condense into droplets. These droplets will slide down and mix with the unevaporated cesium (rubidium). These droplets need to be reheated and evaporated again, resulting in low distillation efficiency.

[0004] The invention patent with the authorized announcement number CN105506309B discloses a three-stage distillation device for alkali metal purification, including: a pumping device and a purification device. Among them, the purification device includes a raw material bottle, a first-stage spherical distillation bottle, a second-stage distillation pipe, a third-stage distillation pipe, a purification recovery pipe, and a purification sampling bottle; one end of the purification recovery pipe is connected to the pumping device, and the other end is communicated with the lower end of the third-stage distillation pipe. At the same time, the purification recovery pipe is also connected to a purification sampling bottle; the upper end of the third-stage distillation pipe is communicated with the lower end of the second-stage distillation pipe; the upper end of the second-stage distillation pipe is communicated with the first-stage spherical distillation bottle placed at the same height; the first-stage spherical distillation bottle is also connected to a raw material bottle; the second-stage distillation pipe and the third-stage distillation pipe use an internal heating method to heat the alkali metal inside, that is, the heating wire is placed inside the glass tube, and the liquid is uniformly heated on the upper surface of the alkali metal liquid.

[0005] In the above patent, the quality of distillation is ensured and the purity of alkali metal is improved. However, it can be seen from its specification and drawings that the raw material bottle is connected to the first-stage spherical distillation bottle through a connecting pipe, and the first-stage spherical distillation bottle is connected to the second-stage distillation pipe through a connecting pipe. The diameter of the connecting pipe is small, so some vapor cannot enter the connecting pipe in time. These vapor will contact the inner wall of the top of the raw material bottle and condense into droplets. These droplets will slide down and mix with the unevaporated cesium (rubidium). These droplets need to be reheated and evaporated again. Similarly, the first-stage spherical distillation bottle also has the same problem, which leads to low distillation efficiency.

[0006] Therefore, it is necessary to develop an alkali metal distillation and purification device to address the above defects. Summary of the Utility Model

[0007] The object of the present utility model is to provide an alkali metal distillation and purification device, which can solve the defect that some cesium (rubidium) vapor of alkali metal will contact the inner wall of the top of the distillation container and condense into liquid droplets, and these liquid droplets will slide down and mix with the unevaporated cesium (rubidium), and these liquid droplets need to be reheated and evaporated, resulting in low distillation efficiency.

[0008] To solve the above technical problems, the present utility model adopts the following technical solutions:

[0009] An alkali metal distillation and purification device of the present utility model includes a first glass distillation flask, a second glass distillation flask, a glass collection container, a first glass tube, an annular flow collecting groove and an annular component. An annular component is coaxially provided on the upper part of the inner walls of the first glass distillation flask and the second glass distillation flask. The two annular components respectively enclose the annular flow collecting groove with the inner walls of the corresponding first glass distillation flask and the second glass distillation flask, and the opening of the annular flow collecting groove faces upward; the tops of the first glass distillation flask and the second glass distillation flask are both conical;

[0010] The inner cavity at the bottom of the annular flow collecting groove of the first glass distillation flask communicates with the middle part of the inner cavity of the second glass distillation flask, and the inner cavity at the bottom of the annular flow collecting groove of the first glass distillation flask is higher than the middle part of the inner cavity of the second glass distillation flask;

[0011] The first glass tube is arranged obliquely upward and its bottom end communicates with the middle part of the inner cavity of the first glass distillation flask;

[0012] The inner cavity at the bottom of the annular flow collecting groove of the second glass distillation flask communicates with the top of the inner cavity of the glass collection container, and the inner cavity at the bottom of the annular flow collecting groove of the second glass distillation flask is higher than the top of the inner cavity of the glass collection container.

[0013] Further, the second glass distillation flask is arranged on one side of the first glass distillation flask, and the first glass distillation flask is communicated with the second glass distillation flask through a second glass tube; the top end of the second glass tube communicates with the inner cavity at the bottom of the annular flow collecting groove of the first glass distillation flask, and the bottom end of the second glass tube communicates with the middle part of the inner cavity of the second glass distillation flask.

[0014] Further, the glass collection container is arranged on one side of the second glass distillation flask, and the second glass distillation flask is communicated with the glass collection container through a third glass tube. The top end of the third glass tube communicates with the inner cavity at the bottom of the annular flow collecting groove of the second glass distillation flask, and the bottom end of the third glass tube communicates with the top of the inner cavity of the glass collection container.

[0015] Further, the cross section of the annular flow collecting groove is a rectangle with an upward opening.

[0016] Furthermore, the annular member is in the shape of a conical ring, with the larger-diameter end of the conical-ring-shaped annular member at the bottom and the smaller-diameter end at the top; the larger-diameter ends of the two conical-ring-shaped annular members are fixedly connected to the inner walls of the corresponding first glass distillation flask and the second glass distillation flask respectively.

[0017] Compared with the prior art, the beneficial technical effects of the present utility model are as follows:

[0018] In a device for distilling and purifying alkali metals of the present utility model, the tops of the first glass distillation flask and the second glass distillation flask are both in the shape of a cone. The top of the cone shape facilitates the liquid droplets to slide down along the inner wall of the cone. The annular flow collecting groove is used to collect the liquid droplets, and these liquid droplets can flow into the corresponding second glass distillation flask or the glass collecting container, thus solving the defect that some cesium (rubidium) vapor of alkali metals will contact the inner wall of the top of the distillation container and condense into liquid droplets. These liquid droplets will slide down and mix with the unevaporated cesium (rubidium), and these liquid droplets need to be reheated and evaporated again, resulting in low distillation efficiency. Description of the Drawings

[0019] The present utility model will be further described below in conjunction with the description of the drawings.

[0020] Figure 1 It is a front view structural schematic diagram of the present utility model;

[0021] Figure 2 It is a three-dimensional structural schematic diagram of the first glass distillation flask of the present utility model;

[0022] Figure 3 It is a three-dimensional sectional structural schematic diagram of an internal structure of the first glass distillation flask of the present utility model;

[0023] Figure 4 It is another three-dimensional sectional structural schematic diagram of an internal structure of the first glass distillation flask of the present utility model.

[0024] Description of the reference numerals: 1. First glass distillation flask; 2. Second glass distillation flask; 3. Glass collecting container; 4. First glass tube; 5. Annular flow collecting groove; 6. Second glass tube; 7. Third glass tube; 8. Annular member. Detailed Embodiments

[0025] The core of the present utility model is to provide a device for distilling and purifying alkali metals, which can solve the defect that some cesium (rubidium) vapor of alkali metals will contact the inner wall of the top of the distillation container and condense into liquid droplets. These liquid droplets will slide down and mix with the unevaporated cesium (rubidium), and these liquid droplets need to be reheated and evaporated again, resulting in low distillation efficiency.

[0026] Next, the technical solutions in the embodiments of the present utility model will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present utility model. Obviously, the described embodiments are only a part of the embodiments of the present utility model, rather than all the embodiments. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present utility model without creative efforts shall fall within the protection scope of the present utility model.

[0027] In the description of the present utility model, it should be understood that the orientation or positional relationships indicated by the terms "upper", "lower", "front", "rear", "left", "right", "top", "bottom", "inner", "outer", "middle", etc. are based on the orientation or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present utility model and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of the present utility model.

[0028] Referring to the accompanying drawings, Figure 1 is the front view structural schematic diagram of the present utility model; Figure 2 is the three-dimensional structural schematic diagram of the first glass distillation flask of the present utility model; Figure 3 is a three-dimensional sectional structural schematic diagram of an internal structure of the first glass distillation flask of the present utility model; Figure 4 is another three-dimensional sectional structural schematic diagram of an internal structure of the first glass distillation flask of the present utility model.

[0029] In a specific embodiment of the present utility model, as Figures 1 to 4 shown, it includes a first glass distillation flask 1, a second glass distillation flask 2, a glass collection container 3, a first glass tube 4, an annular flow collecting groove 5 and an annular component 8. An annular component 8 is coaxially provided on the upper part of the inner walls of both the first glass distillation flask 1 and the second glass distillation flask 2. The two annular components 8 respectively form an annular flow collecting groove 5 with the inner walls of the corresponding first glass distillation flask 1 and the second glass distillation flask 2, and the opening of the annular flow collecting groove 5 faces upward; the tops of both the first glass distillation flask 1 and the second glass distillation flask 2 are conical. Specifically, the conical top facilitates the liquid droplets to slide down along the inner wall of the cone. The annular flow collecting groove 5 is used to collect the liquid droplets to prevent the liquid droplets from mixing with the unevaporated cesium (rubidium). The structures of the first glass distillation flask 1 and the second glass distillation flask 2 are the same; the structures of the first glass tube 4, the second glass tube 6 and the third glass tube 7 are the same.

[0030] The inner cavity at the bottom of the annular flow collecting groove 5 of the first glass distillation flask 1 is communicated with the middle part of the inner cavity of the second glass distillation flask 2, and the inner cavity at the bottom of the annular flow collecting groove 5 of the first glass distillation flask 1 is higher than the middle part of the inner cavity of the second glass distillation flask 2;

[0031] The first glass tube 4 is arranged obliquely upward and its bottom end is communicated with the middle part of the inner cavity of the first glass distillation flask 1;

[0032] The inner cavity at the bottom of the annular flow collecting groove 5 of the second glass distillation flask 2 communicates with the top of the inner cavity of the glass collecting container 3, and the inner cavity at the bottom of the annular flow collecting groove 5 of the second glass distillation flask 2 is higher than the top of the inner cavity of the glass collecting container 3.

[0033] Specifically, when distilling cesium (rubidium) alkali metal in the first glass distillation flask 1, some droplets formed by the condensation of alkali metal vapor on the inner wall of the top of the first glass distillation flask 1 slide into the annular flow collecting groove 5, and then the droplets flow into the bottom of the inner cavity of the second glass distillation flask 2; similarly, when distilling cesium (rubidium) alkali metal in the second glass distillation flask 2, some droplets formed by the condensation of alkali metal vapor on the inner wall of the top of the second glass distillation flask 2 slide into the annular flow collecting groove 5, and then the droplets flow into the glass collecting container 3. In summary, the utility model can solve the defect that some cesium (rubidium) alkali metal vapor will contact the inner wall of the top of the distillation container and condense into droplets, these droplets will slide down and mix with the unevaporated cesium (rubidium), and these droplets need to be reheated and evaporated, resulting in low distillation efficiency.

[0034] The second glass distillation flask 2 is arranged on one side of the first glass distillation flask 1, and the first glass distillation flask 1 is communicated with the second glass distillation flask 2 through a second glass tube 6; the top end of the second glass tube 6 communicates with the inner cavity at the bottom of the annular flow collecting groove 5 of the first glass distillation flask 1, and the bottom end of the second glass tube 6 communicates with the middle of the inner cavity of the second glass distillation flask 2.

[0035] The glass collecting container 3 is arranged on one side of the second glass distillation flask 2, and the second glass distillation flask 2 is communicated with the glass collecting container 3 through a third glass tube 7. The top end of the third glass tube 7 communicates with the inner cavity at the bottom of the annular flow collecting groove 5 of the second glass distillation flask 2, and the bottom end of the third glass tube 7 communicates with the top of the inner cavity of the glass collecting container 3.

[0036] The annular flow collecting groove 5 can be set as Figure 3 shown in the structure: the cross-section of the annular part 8 is L-shaped, and the bottom edges of the two annular parts 8 are respectively fixedly connected to the inner walls of the corresponding first glass distillation flask 1 and the second glass distillation flask 2, that is, the cross-section of the annular flow collecting groove 5 is a rectangle with an upward opening.

[0037] The annular flow collecting groove 5 can also be set as Figure 4 shown in the structure: the annular part 8 is in a conical ring shape, with the larger diameter end of the conical ring-shaped annular part 8 at the bottom and the smaller diameter end at the top; the larger diameter ends of the two conical ring-shaped annular parts 8 are respectively fixedly connected to the inner walls of the corresponding first glass distillation flask 1 and the second glass distillation flask 2. Preferably, it is the structure shown in Figure 4 shown in the figure, because: Figure 3 In the structure shown in the figure, the bottom area of the annular flow collecting groove 5 is relatively large, and the droplets are easily attached to the bottom wall, resulting in residue; on the contrary, Figure 4In the shown structure, the bottom area of the annular flow collecting groove 5 is small, and liquid droplets are not likely to remain.

[0038] The working principle of a cesium (rubidium) distillation and purification device of the present utility model: Add cesium (rubidium) of alkali metal to be purified to the bottom of the inner cavity of the first glass distillation flask 1 through the first glass tube 4. After the addition is completed, connect the first glass tube 4 with a vacuum pump arranged outside and evacuate the present utility model. After the evacuation is completed, melt and seal the end of the first glass tube 4 with a blowtorch. When distilling cesium (rubidium) of alkali metal in the first glass distillation flask 1, some liquid droplets formed by the condensation of alkali metal vapor on the inner wall of the top of the first glass distillation flask 1 slide into the annular flow collecting groove 5, and then the liquid droplets flow into the bottom of the inner cavity of the second glass distillation flask 2 through the second glass tube 6, and other cesium (rubidium) vapor of alkali metal enters the inner cavity of the second glass distillation flask 2 through the second glass tube 6; similarly, when distilling cesium (rubidium) of alkali metal in the second glass distillation flask 2, some liquid droplets formed by the condensation of alkali metal vapor on the inner wall of the top of the second glass distillation flask 2 slide into the annular flow collecting groove 5, and the liquid droplets then flow into the glass collection container 3 through the third glass tube 7, and other cesium (rubidium) vapor of alkali metal enters the inner cavity of the glass collection container 3 through the third glass tube 7. After the distillation of the first glass distillation flask 1 is completed, melt, disconnect and seal the second glass tube 6 with a blowtorch; after the distillation of the second glass distillation flask 2 is completed, melt, disconnect and seal the third glass tube 7 with a blowtorch. In summary, the present utility model can solve the defect that some cesium (rubidium) vapor of alkali metal will contact the inner wall of the top of the distillation container and condense into liquid droplets, these liquid droplets will slide down and mix with unevaporated cesium (rubidium), and these liquid droplets need to be reheated and evaporated, resulting in low distillation efficiency.

[0039] In this specification, each embodiment is described in a progressive manner. The key point of each embodiment is to illustrate the differences from other embodiments. The same or similar parts among the embodiments can be referred to each other, and the embodiments can be combined with each other. For the device disclosed in the embodiment, since it corresponds to the method disclosed in the embodiment, the description is relatively simple, and the relevant parts can be referred to the description of the method part.

[0040] The embodiments described above are only descriptions of the preferred modes of the present utility model, and do not limit the scope of the present utility model. Without departing from the design spirit of the present utility model, various deformations and improvements made by those of ordinary skill in the art to the technical solution of the present utility model shall fall within the protection scope determined by the claims of the present utility model.

Claims

1. An alkali metal distillation and purification device, characterized in that: The invention comprises a first glass distillation bottle (1), a second glass distillation bottle (2), a glass collecting container (3), a first glass tube (4), an annular collecting groove (5) and an annular component (8), wherein the inner wall upper parts of the first glass distillation bottle (1) and the second glass distillation bottle (2) are coaxially provided with the annular component (8), the two annular components (8) respectively form the annular collecting groove (5) with the corresponding inner walls of the first glass distillation bottle (1) and the second glass distillation bottle (2), and the opening of the annular collecting groove (5) faces upward; the top ends of the first glass distillation bottle (1) and the second glass distillation bottle (2) are both in the shape of cones; The inner cavity at the bottom of the annular collecting groove (5) of the first glass distillation bottle (1) is connected to the middle of the inner cavity of the second glass distillation bottle (2), and the inner cavity at the bottom of the annular collecting groove (5) of the first glass distillation bottle (1) is higher than the middle of the inner cavity of the second glass distillation bottle (2); The first glass tube (4) is arranged to be inclined upward and the bottom end thereof is connected to the middle part of the inner cavity of the first glass distillation bottle (1); The inner cavity at the bottom of the annular collecting trough (5) of the second glass distillation bottle (2) is connected to the inner cavity top of the glass collection container (3), and the inner cavity at the bottom of the annular collecting trough (5) of the second glass distillation bottle (2) is higher than the inner cavity top of the glass collection container (3).

2. The alkali metal distillation and purification device according to claim 1, characterized in that: The second glass distillation flask (2) is arranged on one side of the first glass distillation flask (1), and the first glass distillation flask (1) is connected to the second glass distillation flask (2) through a second glass tube (6); the top end of the second glass tube (6) is connected to the bottom inner cavity of the annular collecting trough (5) of the first glass distillation flask (1), and the bottom end of the second glass tube (6) is connected to the middle part of the inner cavity of the second glass distillation flask (2).

3. The alkali metal distillation and purification device according to claim 1, characterized in that: The glass collection container (3) is arranged on one side of the second glass distillation bottle (2); the second glass distillation bottle (2) is connected to the glass collection container (3) via a third glass tube (7); the top end of the third glass tube (7) is connected to the bottom inner cavity of the annular collecting trough (5) of the second glass distillation bottle (2); and the bottom end of the third glass tube (7) is connected to the top of the inner cavity of the glass collection container (3).

4. The alkali metal distillation and purification device according to claim 1, characterized in that: The cross section of the annular collecting groove (5) is a rectangle with the opening facing upward.

5. The alkali metal distillation and purification device according to claim 1, characterized in that: The annular component (8) is in the shape of a cone ring, with the end of the annular component (8) having a larger diameter being at the bottom and the end of the annular component (8) having a smaller diameter being at the top; the ends of the two annular components (8) having a larger diameter are respectively fixedly connected to the inner walls of the corresponding first glass distillation bottle (1) and the second glass distillation bottle (2).

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