Vacuum distillation device and system thereof

Abstract

The invention relates to the field of distillation, and provides a vacuum distillation device which comprises an upper pipe body used for loading raw materials and a lower pipe body used for collecting products, the upper pipe body is provided with a first heating sleeve, a funnel-shaped communicating pipe is arranged in the upper pipe body and located above the raw materials, and the upper pipe body and the lower pipe body are communicated through the communicating pipe. The structure of the distillation device can repeatedly distill raw materials, so that the purity of an extract is further improved; meanwhile, the invention further provides a vacuum distillation system, the distillation device can be kept to operate under good conditions, and the distillation stability and treatment capacity are improved.

Description

Technical Field

[0001] The present application relates to the field of distillation, and in particular to a vacuum distillation device and a system thereof. Background Art

[0002] Vacuum distillation purification is a technology that removes impurities from the substance to be purified based on the difference in saturated vapor pressure between the substance to be purified and other substances as impurities. It is widely used in the preparation of high-purity materials in many fields. It uses the different volatility of the components in the distillate to heat the distillate under low pressure, and controls the distillation temperature to make some components volatilize, while other non-volatile substances are separated and purified.

[0003] CN110394205A discloses a distiller, including a distillation tube, a connecting tube and a connecting tube, the distillation tube is made of quartz material, and the distillation tube is placed in a temperature-controlled electric heating sleeve, the distillation tube is provided with a distillation chamber, the bottom of the distillation chamber is provided with a liquid inlet connected to the distillation chamber, the connecting tube is provided with a collecting chamber, the bottom of the collecting chamber is provided with a fraction collecting port connected to the collecting chamber, the connecting tube is located below the distillation tube, the upper end of the connecting tube extends to the top of the distillation chamber, the lower end of the connecting tube extends to the bottom of the collecting chamber, and the top of the connecting tube is provided with an external exhaust port. Combined with the description of the above scheme, its distillation process can be summarized as follows: the raw material is vaporized and enters the top of the connecting tube, and then the steam flows along the connecting tube to the bottom of the connecting tube for condensation. On this basis, combined with its attached drawings, it can be seen that its connecting tube is a straight tube protruding from the distillation tube, and the evaporated gas will quickly enter the connecting tube with a small amount of impurities, thereby causing the purity of the final extract to decrease.

[0004] Based on this, the technical problem solved in this case is: how to improve the structure of the vacuum distillation device to further improve the purity of the extract. Summary of the invention

[0005] In order to solve the above technical problems, the present application provides a vacuum distillation device, the structure of which can repeatedly distill raw materials, thereby further improving the purity of the extract; at the same time, the present application also provides a vacuum distillation system, which can keep the distillation device running under good conditions and improve the stability and processing capacity of the distillation.

[0006] The technical solution of this application is:

[0007] A vacuum distillation device comprises an upper tube body for loading raw materials and a lower tube body for collecting products. The upper tube body is provided with a first heating jacket, a funnel-shaped connecting pipe is provided in the upper tube body and the connecting pipe is located above the raw materials. The upper tube body and the lower tube body are connected through the connecting pipe.

[0008] When the raw material in the upper tube body is heated and evaporated, part of the steam generated directly passes through the gap between the connecting tube and the upper tube body, and is transported to the lower tube body under the action of air pressure and heat; the other part of the steam generated will adhere to the outer surface of the upper tube body and the connecting tube and condense into droplets. The droplets fall back into the raw material and are repeatedly distilled, thereby further improving the purity.

[0009] In the above-mentioned vacuum distillation device, the upper tube body is provided with an exhaust port connected to an external exhaust device, and the lower tube body is provided with an exhaust port connected to an external exhaust gas treatment device.

[0010] In the above-mentioned vacuum distillation device, a detachable cover plate is provided at the upper end of the upper tube body; a support tube connected to the lower tube body is provided in the upper tube body; the support tube extends into the upper tube body; and the connecting tube is detachably arranged on the support tube.

[0011] In the above vacuum distillation apparatus, the lower tube body is provided with a second heating jacket.

[0012] Also disclosed is a vacuum distillation system, comprising at least two vacuum distillation devices as any of the above, and also comprising an exhaust device for regulating the vacuum state of all vacuum distillation devices, the exhaust device being provided with a main pipeline and multiple branch pipelines; one end of the branch pipeline is connected to the main pipeline, and the other end is connected to the upper pipe body.

[0013] The above-mentioned distillation system controls the vacuum state of all vacuum distillation devices through the exhaust device to make the vacuum degree of each vacuum distillation device consistent, and thus make the content of the purified material in each vacuum distillation device as consistent as possible.

[0014] The above-mentioned vacuum distillation system also includes a filtering device for collecting dust generated during the distillation process. One end of the branch pipe is connected to the main pipe, and the other end is connected to the filtering device. The filtering device is provided with a dust collecting pipe connected to the exhaust port of the upper pipe body, an air inlet pipe connected to the outside world, and a resistance vacuum gauge for detecting the vacuum degree of the filtering device.

[0015] In the above vacuum distillation system, two vacuum distillation devices are grouped together and are connected to the filtering device through dust collecting pipes respectively.

[0016] In the above vacuum distillation system, the tail gas treatment device is provided with a tail gas main pipe and a plurality of tail gas branch pipes; one end of the tail gas branch pipe is connected to the tail gas main pipe, and the other end of the tail gas branch pipe is connected to the exhaust gas port of the lower pipe body.

[0017] In the above-mentioned vacuum distillation system, the vacuum device includes a primary vacuum pump, a secondary vacuum pump, and a negative pressure tank which are connected in sequence; and the main pipeline is connected to the negative pressure tank.

[0018] The above-mentioned vacuum distillation system also includes a waste gas treatment device, which is provided with a waste gas main pipe, a first waste gas branch pipe connected to the primary vacuum pump, and a second waste gas branch pipe connected to the secondary vacuum pump.

[0019] One of the above technical solutions of the present application has at least one of the following advantages or beneficial effects:

[0020] The vacuum distillation device of the present application can accurately control the distillation temperature by heating the upper tube body with the first heating jacket, thereby adjusting the relationship between the saturated vapor pressure and temperature of each component in the raw material to achieve a higher distillation purity; in addition, through the coordination relationship between the upper tube body and the funnel-shaped connecting tube, a raw material cavity and a steam cavity are formed in the upper tube body, so that part of the steam can be retained in the raw material cavity and repeatedly distilled, thereby further improving the purity.

[0021] The vacuum distillation system of the present application controls the vacuum state of all vacuum distillation devices through a vacuum pump to make the vacuum degree of each vacuum distillation device consistent, thereby making the content of purified materials in each vacuum distillation device as consistent as possible, and also improving production capacity. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Figure 1 This is a schematic structural diagram of the vacuum distillation apparatus of Example 1 of the present application;

[0023] Figure 2 This is a schematic diagram of the layout of the vacuum distillation system of Example 2 of the present application.

[0024] Description of reference numerals:

[0025] 1. Vacuum distillation device; 11. Upper tube body; 12. Lower tube body; 13. Connecting tube; 14. First heating jacket; 15. Second heating jacket; 16. Support tube; 17. Cover plate; A. Raw material chamber; B. Steam chamber; 2. Exhaust device; 21. Primary vacuum pump; 22. Secondary vacuum pump; 23. Negative pressure tank; 101. Main pipeline; 102. Branch pipeline; 3. Filter device; 201. Dust collecting pipe; 202. Inlet pipe; 110. Solenoid control valve; 120. Resistance vacuum gauge; 301. Exhaust main pipe; 302. First exhaust branch pipe; 303. Second exhaust branch pipe; 401. Exhaust main pipe; 402. Exhaust branch pipe. DETAILED DESCRIPTION

[0026] The technical solutions in the embodiments of the present application are described clearly and completely below. Obviously, the described embodiments are only part of the embodiments of the present application, not all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present application.

[0027] Example 1

[0028] A vacuum distillation device comprises an upper tube body 11 for loading raw materials and a lower tube body 12 for collecting products. The upper tube body 11 is provided with a first heating jacket 14. A funnel-shaped connecting pipe 13 is provided in the upper tube body 11 and the connecting pipe 13 is located above the raw materials. The upper tube body 11 and the lower tube body 12 are connected through the connecting pipe 13.

[0029] In this embodiment, a frame for installing and supporting the vacuum distillation device 1 is also included.

[0030] In practical applications, the upper tube body 11 and the funnel-shaped connecting tube 13 are matched to form a Figure 1 The raw material chamber A is shown below the connecting pipe 13 and the steam chamber B is shown above the connecting pipe 13 .

[0031] In actual application, when the raw material in the upper tube body 11 is heated and evaporated, a part of the generated steam enters the steam chamber B through the gap between the connecting tube 13 and the upper tube body 11. This part of the steam is transported to the lower tube body 12 through the connecting tube 13 under the action of air pressure and heat; the other part of the generated steam will adhere to the inner wall of the upper tube body 11 and the outer surface of the funnel-shaped connecting tube 13 and condense into droplets. The droplets fall back into the raw material chamber A and are repeatedly distilled, thereby further improving the purity.

[0032] In this embodiment, the lower tube body 12 is provided with a second heating jacket 15. Under the above design, the second heating jacket 15 keeps the product in liquid state by keeping the lower tube body 12 warm. In addition, in actual application, the temperature of the first heating jacket 14 is determined by the boiling point and vapor pressure of the impurities and the purified product in the raw material, and the temperature of the second heating jacket 15 is lower than the temperature of the first heating jacket 14 so that the steam can be transported to the lower tube body 12 through the connecting pipe 13, and the pressure difference in the regulating tube is achieved by independently regulating the temperature of the first heating jacket 14 and the second heating jacket 15, thereby adjusting the conveying speed. In addition, the lower tube body 12 maintains the temperature of the purified product.

[0033] In actual application, the upper tube body 11 is provided with an exhaust port connected to the external exhaust device 2. In order to maintain the safety of the working environment and implement the concept of environmental protection, the lower tube body 12 is provided with an exhaust port connected to the external exhaust treatment device.

[0034] In this embodiment, a detachable cover plate 17 is provided at the upper end of the upper tube body 11 ; a support tube 16 connected to the lower tube body 12 is provided in the upper tube body 11 ; the support tube 16 extends into the upper tube body 11 ; and the connecting tube 13 is detachably arranged on the support tube 16 .

[0035] Under the above design, the loading process of this embodiment is as follows: open the cover plate 17, put the raw material into the raw material cavity A of the upper tube body 11, such as powdered crude selenium, specifically, the raw material is placed between the support tube 16 and the upper tube body 11, and after the loading is completed, put in the connecting tube 13, the connecting tube 13 passes through the support tube 16 to connect the upper tube body 11 and the lower tube body 12, and cover the cover plate 17. In addition, the support tube 16 is provided with a groove that cooperates with the funnel-shaped connecting tube 13 to fit the two tightly. On the one hand, the groove can stably support the connecting tube 13, and on the other hand, prevent the existence of a gap between the two that allows steam to pass, which causes the product to remain in the gap, thereby reducing the collection rate.

[0036] Example 2

[0037] A vacuum distillation system comprises 12 vacuum distillation devices 1 as in the above-mentioned embodiment 1, wherein the vacuum distillation devices 1 are grouped in two, and further comprise an exhaust device 2 for regulating the vacuum state of all vacuum distillation devices 1 and a filtering device 3 for collecting dust generated during the distillation process, wherein the exhaust device 2 is provided with a main pipeline 101 and 6 branch pipelines 102; one end of the branch pipeline 102 is connected to the main pipeline 101, and the other end is connected to the filtering device 3; the filtering device 3 is provided with a dust collecting pipe 201 connected to the upper tube body 11, an air inlet pipe 202 connected to the outside, and a resistance vacuum gauge 120 for detecting the vacuum degree of the filtering device 3; the two vacuum distillation devices 1 are connected to the filtering device 3 via the dust collecting pipe 201.

[0038] In this embodiment, the branch pipe 102, dust collecting pipe 201, and air inlet pipe 202 are all vacuum hoses and are all provided with electromagnetic control valves 110. The air extraction device 2 includes a primary vacuum pump 21, a secondary vacuum pump 22, and a negative pressure tank 23 connected in sequence; the main pipe 101 is connected to the negative pressure tank 23. Specifically, the primary vacuum pump 21 is a Roots vacuum pump, and the secondary vacuum pump 22 is a fore-stage pump of the Roots vacuum pump. Those skilled in the art can select different types of fore-stage pumps according to different vacuum degrees and air extraction rates, such as a water ring vacuum pump, a rotary vane vacuum pump, a vertical oil-free vacuum pump, a reciprocating vacuum pump, etc., so the type of the fore-stage pump is not limited in this embodiment.

[0039] Under the above design, when vacuuming is required, the electromagnetic control valve 110 of the branch pipe 102 and the dust collecting pipe 201 is opened, and the electromagnetic control valve 110 of the air inlet pipe 202 is closed. Under the action of the vacuum pump, the gas in the vacuum distillation device 1 is successively drawn into the negative pressure tank 23 through the dust collecting pipe 201, the branch pipe, and the main pipe 101. In addition, in order to detect the vacuum state inside the vacuum system throughout the process, the negative pressure tank 23 is also connected to the resistance vacuum gauge 120; when it is necessary to restore normal pressure, the electromagnetic control valve 110 of the air inlet pipe 202 is opened, and the electromagnetic control valve 110 of the branch pipe 102 is closed, and the vacuum distillation device 1 is naturally inhaled.

[0040] As a preferred embodiment of the present invention, the above-mentioned vacuum device 2 is spatially separated from the vacuum distillation device 1, thereby reducing the material components and noise pollution generated by the operation of the vacuum pump in the environment, and effectively reducing the uncertain factors affecting the purity of the product.

[0041] The distillation system controls the vacuum state of all vacuum distillation devices 1 through the exhaust device 2 to make the vacuum degree of each vacuum distillation device 1 consistent, and thus make the content of the purified material in each vacuum distillation device 1 as consistent as possible.

[0042] Specifically, it also includes an exhaust gas treatment device, which is provided with an exhaust gas main pipe 401 and 8 exhaust gas branch pipes 402; one end of the exhaust gas branch pipe 402 is connected to the exhaust gas main pipe 401, and the other end of the exhaust gas branch pipe 402 is connected to the exhaust gas port of the lower pipe body 12.

[0043] In this embodiment, the exhaust gas branch pipe 402 is provided with an electromagnetic control valve 110 , and the electromagnetic control valve 110 of the exhaust gas branch pipe 402 is opened only when exhaust gas needs to be discharged.

[0044] More specifically, the above-mentioned vacuum distillation system also includes a waste gas treatment device, which is provided with a waste gas main pipe 301, a first waste gas branch pipe 302 connected to the primary vacuum pump 21, and a second waste gas branch pipe 303 connected to the secondary vacuum pump 22.

[0045] In this embodiment, the exhaust gas treatment device is not shown in the figure. Those skilled in the art can select different exhaust gas treatment devices according to different raw materials, which should also be within the protection scope of this embodiment.

[0046] Although the embodiments of the present application have been shown and described, those skilled in the art will appreciate that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present application, and that the scope of the present application is defined by the claims and their equivalents.

Claims

1. A vacuum distillation apparatus, characterized in that: It includes an upper tube body for loading raw materials and a lower tube body for collecting products. The upper tube body is provided with a first heating jacket. A funnel-shaped connecting pipe is provided inside the upper tube body and the connecting pipe is located above the raw materials. The upper tube body and the lower tube body are connected through the connecting pipe.

2. The vacuum distillation apparatus according to claim 1, characterized in that: The upper tube body is provided with an exhaust port communicated with an external air extraction device, and the lower tube body is provided with an exhaust port communicated with an external exhaust gas treatment device.

3. The vacuum distillation apparatus according to claim 1, characterized in that: A detachable cover plate is disposed at the upper end of the upper tube body; a support tube connected to the lower tube body is disposed inside the upper tube body; the support tube extends into the upper tube body; and the connecting tube is detachably disposed on the support tube.

4. The vacuum distillation apparatus according to claim 1, characterized in that: The lower tube body is provided with a second heating jacket.

5. A vacuum distillation system, comprising at least two vacuum distillation apparatuses according to any one of claims 1 to 4, characterized in that: It also includes an exhaust device for regulating the vacuum state of all vacuum distillation devices, wherein the exhaust device is provided with a main pipeline and a plurality of branch pipelines; one end of the branch pipeline is connected to the main pipeline, and the other end is connected to the upper pipe body.

6. The vacuum distillation system according to claim 5, characterized in that: The vacuum distillation system also includes a filtering device for collecting dust generated during the distillation process. One end of the branch pipe is connected to the main pipe, and the other end is connected to the filtering device. The filtering device is provided with a dust collecting pipe connected to the upper pipe body, an air intake pipe connected to the outside world, and a resistance vacuum gauge for detecting the vacuum degree of the filtering device.

7. The vacuum distillation system according to claim 6, characterized in that: The vacuum distillation devices are grouped in two and are connected to the filtering device through dust collecting pipes respectively.

8. The vacuum distillation system according to claim 5, characterized in that: It also includes an exhaust gas treatment device, which is provided with an exhaust gas main pipe and multiple exhaust gas branch pipes; one end of the exhaust gas branch pipe is connected to the exhaust gas main pipe, and the other end of the exhaust gas branch pipe is connected to the lower pipe body.

9. The vacuum distillation system according to claim 5, characterized in that: The air extraction device comprises a primary vacuum pump, a secondary vacuum pump, and a negative pressure tank which are connected in sequence; and the main pipeline is connected to the negative pressure tank.

10. The vacuum distillation system according to claim 9, characterized in that: The vacuum distillation system also includes a waste gas treatment device, which is provided with a waste gas main pipe, a first waste gas branch pipe connected to the primary vacuum pump, and a second waste gas branch pipe connected to the secondary vacuum pump.

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