Rectification device for boron trifluoride

Abstract

The utility model discloses a boron trifluoride rectification device, which comprises a raw material preheater, a rectifier, a total condenser and a reboiler, the raw material preheater, the rectifier and the total condenser are communicated through a first loop, the raw material preheater, the rectifier and the reboiler are communicated through a second reflux, and the total condenser is communicated with the reboiler through a second reflux. A feeding plate is arranged in the rectifier to divide the rectifier into a rectifying section and a stripping section, and a protective shell is detachably arranged on the inner wall of the stripping section. By arranging the detachable protective shell, the inner wall of the lifting section can be protected, when cleaning is needed, the inner wall of the rectification device can be cleaned by taking down the protective shell and replacing the protective shell with a new protective shell, and the whole operation is convenient and rapid.

Description

Technical Field

[0001] The utility model relates to the technical field of distillation devices, in particular to a distillation device for boron trifluoride. Background Art

[0002] Boron trifluoride can be used as a boron source for preparing boron powder, boronizing, etc., and can also be used as a flux and lubricant in metallurgy and welding. Boron trifluoride can also be used in the manufacture of neutron detectors, semiconductors, and microchips, and is a substance with a very wide range of applications. The demand for the use of high-purity boron trifluoride is increasing day by day, and the prior art usually produces high-purity boron trifluoride by distillation. For example, in daily laboratories, the preparation of high-purity boron trifluoride is usually achieved by a small low-temperature distillation device, but the existing distillation device cannot be used to clean its inner wall quickly and conveniently during use. Therefore, the present application aims to provide a distillation device for boron trifluoride that can overcome the above-mentioned defects. Utility Model Content

[0003] The utility model aims to overcome the disadvantages of the prior art and provide a distillation device for boron trifluoride.

[0004] The purpose of the utility model is achieved through the following technical scheme: a distillation device for boron trifluoride, comprising a raw material preheater, a rectifier, a full condenser and a reboiler, the raw material preheater, the rectifier and the full condenser are connected through a first loop, the raw material preheater, the rectifier and the reboiler are connected through a second reflux, a feed plate is provided in the rectifier to separate the rectifier into a distillation section and a stripping section, and a protective shell is detachably provided on the inner wall of the stripping section.

[0005] Preferably, the cross-sectional shape of the protective shell can be defined as a circular ring, and a plurality of protrusions are provided on the inner wall of the protective shell.

[0006] Preferably, sealing rings are provided on both ends of the protective shell.

[0007] Preferably, an ultrasonic generator is provided on the protective shell.

[0008] Preferably, a sealing cover is hingedly provided at the bottom of the rectifier.

[0009] Preferably, a bracket is provided on the outer wall of the rectifier, and a plurality of support plates are provided along the circumference of the bracket.

[0010] Preferably, the raw material preheater, the full condenser and the reboiler are all arranged on the support plate.

[0011] The utility model has the following advantages:

[0012] (1) By providing a detachable protective shell, the inner wall of the distillation section can be protected. When cleaning is required, the inner wall of the distillation device can be cleaned by removing the protective shell and replacing it with a new protective shell. The whole operation is convenient and quick.

[0013] (2) By providing the protrusions, the area of ​​the fluid can be increased, thereby increasing the contact area between the fluid and the gas in the rectifier, thereby improving the distillation effect.

[0014] (3) When the protective shell needs to be cleaned, the ultrasonic generator can be turned on to achieve high-frequency vibration of the protective shell, thereby removing the attachments on its surface. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 It is a schematic diagram of the modular structure of the distillation device of the utility model;

[0016] Figure 2 It is a structural schematic diagram of a distillation device;

[0017] In the figure, 1-raw material preheater, 2-rectifier, 3-full condenser, 4-reboiler, 5-first loop, 6-second loop, 7-feed plate, 2a-rectification section, 2b-stripping section, 8-protective shell, 9-protrusion, 10-sealing ring, 11-ultrasonic generator, 12-sealing cover, 13-bracket, 14-support plate. DETAILED DESCRIPTION

[0018] The utility model is further described below in conjunction with the accompanying drawings, and the protection scope of the utility model is not limited to the following:

[0019] like Figure 1 and Figure 2 As shown, the present application provides a distillation device for boron trifluoride, including a raw material preheater 1, a distillation device 2, a full condenser 3 and a reboiler 4. The raw material preheater 1, the distillation device 2 and the full condenser 3 are connected through a first loop 5, and the raw material preheater 1, the distillation device 2 and the reboiler 4 are connected through a second reflux 6. A feed plate 7 is provided in the distillation device 2 to separate the distillation device 2 into a distillation section 2a and a stripping section 2b. A protective shell 8 is detachably provided on the inner wall of the stripping section 2b. By providing a detachable protective shell 8, the inner wall of the stripping section 2b can be protected. When cleaning is required, the inner wall of the distillation device can be cleaned by removing the protective shell 8 and replacing it with a new protective shell. The whole operation is convenient and quick.

[0020] Preferably, the cross-sectional shape of the protective shell 8 can be defined by a circular ring, and a plurality of protrusions 9 are provided on the inner wall of the protective shell 8. The protrusions can increase the area of ​​the fluid, thereby increasing the contact area between the fluid and the gas in the rectifier, thereby improving the distillation effect.

[0021] Preferably, sealing rings 10 are provided on both ends of the protective shell 8, which can improve the sealing degree of the inner wall of the rectifier and prevent the inner wall of the rectifier from being contaminated.

[0022] Preferably, an ultrasonic generator 11 is provided on the protective shell 8. When the protective shell needs to be cleaned, the ultrasonic generator 11 can be turned on to achieve high-frequency vibration of the protective shell, thereby removing the attachments on the surface thereof.

[0023] Preferably, a sealing cover 12 is hingedly provided at the bottom of the rectifier 2. By opening the sealing cover 12, for example, attachments can be removed or the protective shell can be replaced.

[0024] Preferably, a bracket 13 is provided on the outer wall of the rectifier 2, and a plurality of support plates 14 are provided along the circumference of the bracket 13. The raw material preheater 1, the full condenser 3 and the reboiler 4 are all provided on the support plate 14. Through the integrated setting mode, the floor space of the entire distillation device can be reduced, and a miniaturized setting can be achieved, which is more conducive to use in a small laboratory.

[0025] The working principle of the present application is as follows: the raw material preheater 1 preheats the feed and injects it into the distillation device 2 through the feed plate. In the distillation device, the distillation section 2a forms the first gas phase product of boron trifluoride, and the stripping section forms the first liquid phase product of boron trifluoride. The gas phase product enters the full condenser 3 for condensation to obtain the second liquid phase product of boron trifluoride, and the second liquid phase product is refluxed to the distillation section for distillation and purification again. The first liquid phase product enters the reboiler for heating to produce the second gas phase product of boron trifluoride again, and the second gas phase product enters the stripping section again for distillation and purification again. After a certain number of cycles of purification, high-purity boron trifluoride can be obtained.

[0026] Finally, it should be noted that the above description is only a preferred embodiment of the utility model and is not intended to limit the utility model. Although the utility model is described in detail with reference to the above embodiments, those skilled in the art can still modify the technical solutions recorded in the above embodiments or replace some of the technical features therein by equivalents. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the utility model shall be included in the protection scope of the utility model.

Claims

1. A distillation device for boron trifluoride, characterized in that: The invention comprises a raw material preheater (1), a rectifier (2), a full condenser (3) and a reboiler (4); the raw material preheater (1), the rectifier (2) and the full condenser (3) are connected via a first loop (5); the raw material preheater (1), the rectifier (2) and the reboiler (4) are connected via a second reflux (6); a feed plate (7) is provided in the rectifier (2) to separate the rectifier (2) into a rectifying section (2a) and a stripping section (2b); a protective shell (8) is detachably provided on the inner wall of the stripping section (2b).

2. The distillation device according to claim 1, characterized in that: The cross-sectional shape of the protective shell (8) can be defined as a circular ring, and a plurality of protrusions (9) are provided on the inner wall of the protective shell (8).

3. The distillation device according to claim 2, characterized in that: Sealing rings (10) are provided on both ends of the protective shell (8).

4. The distillation device according to claim 3, characterized in that: An ultrasonic generator (11) is arranged on the protective shell (8).

5. The distillation device according to claim 1, characterized in that: A sealing cover (12) is hingedly provided at the bottom of the rectifier (2).

6. The distillation device according to claim 5, characterized in that: A support (13) is provided on the outer wall of the rectifier (2), and a plurality of support plates (14) are provided along the circumference of the support (13).

7. The distillation device according to claim 6, characterized in that: The raw material preheater (1), the full condenser (3) and the reboiler (4) are all arranged on the support plate (14).

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