A distillation column having negative pressure distillation conditions

Abstract

The utility model relates to a distillation tower with negative pressure distillation condition in the field of distillation device, including tower body, still include: vacuum pipe, install on the tower body, baffle, slide connection in the tower body, be located above evaporation area, baffle is located above vacuum pipe, is provided with two groups of arc holes on the baffle, two groups of arc holes are not connected, fill air bag, fixedly connected in the arc hole, fill air bag is connected with the air pipe on, the air pipe is used to fill air in fill air bag, fill air bag is used for filling arc hole, the circulation of blocking gas, adopt above -mentioned structure, through the setting of baffle and vacuum pipe, can separate a relative vacuum space, according to the boiling point of liquid also will reduce accordingly when pressure reduces, can realize vaporization separation under lower temperature, avoid substance decomposition, metamorphic or coking under high temperature, simultaneously this vacuum area can open and close freely, convenient for the use of different needs.

Description

Technical Field

[0001] This utility model relates to a distillation column with negative pressure distillation conditions, and more particularly to a distillation column with negative pressure distillation conditions applied in the field of distillation apparatus. Background Technology

[0002] In many fields such as chemical engineering and pharmaceuticals, distillation is an important separation technology widely used for the separation and purification of mixtures. Distillation towers often need to be operated at high temperatures to achieve vaporization separation of liquids.

[0003] Chinese utility model patent CN201220697552.9 discloses a negative pressure distillation column, including a distillation column body, a discharge port at the bottom of the distillation column body, and a pressure-drafting pipe connected to the top of the distillation column body, which is connected to a vacuum pump through the pressure-drafting pipe. The negative pressure distillation column has a simple structure and is easy to operate. It uses a vacuum method to carry out distillation entirely through physical action, without using any chemical reagents, and does not pollute the produced biological products, thus improving the quality of the products.

[0004] When the above-mentioned device is in use, the vacuum area is always relatively present, and it is impossible to control the opening and closing of the vacuum area according to the needs. This will affect the flow of the evaporating gas and the evaporation efficiency, which has certain shortcomings. Summary of the Invention

[0005] The technical problem that this invention aims to solve is that the opening and closing of the vacuum zone cannot be controlled according to requirements, which affects the flow of the evaporated gas.

[0006] To address the aforementioned problems, this utility model provides a distillation column with negative pressure distillation conditions, comprising a column body and further comprising:

[0007] Vacuum tubes are installed on the tower body, located above the evaporation zone;

[0008] A partition is connected inside the tower body. The partition is located above the vacuum tube and has two sets of arc holes.

[0009] An air bladder is fixedly connected inside the arc hole. An air tube is fixedly connected to the air bladder. The air tube is used to inflate the air bladder. The air bladder is used to fill the arc hole and prevent gas from flowing out through the arc hole.

[0010] In the above problem, the vacuum region can be freely opened and closed.

[0011] As a further improvement of this application, the side of the partition is provided with a groove, and a sealing airbag is connected in the groove.

[0012] As a further improvement to this application, the groove communicates with the arc hole, and one end of the sealing airbag is located inside the arc hole.

[0013] As a further improvement of this application, multiple sets of piston cylinders are fixedly connected inside the tower body. The telescopic ends of the piston cylinders are fixedly connected to the bottom of the partition plate, and connecting pipes are connected to the piston cylinders.

[0014] As another improvement of this application, an installation ring is fixedly connected inside the tower body, and the piston cylinder is fixedly connected to the installation ring.

[0015] As a further improvement to this application, a one-way valve is fixedly connected to the partition.

[0016] In summary, this device, through the arrangement of partitions and vacuum tubes, can create a relatively vacuum space. Since the boiling point of a liquid decreases accordingly when the pressure decreases, vaporization separation can be achieved at a lower temperature, preventing substances from decomposing, deteriorating, or coking at high temperatures. At the same time, this vacuum area can be freely opened and closed, facilitating use for different needs. Attached Figure Description

[0017] Figure 1 This is a perspective structural diagram of the first embodiment of this application;

[0018] Figure 2 This is a cross-sectional view of the first embodiment of this application;

[0019] Figure 3 This is the first embodiment of the present application. Figure 2 An enlarged schematic diagram of part A in the middle;

[0020] Figure 4 This is a top view of the partition in the first embodiment of this application.

[0021] Explanation of the labels in the diagram:

[0022] 1. Tower body; 101. Vacuum tube; 2. Baffle plate; 201. Check valve; 202. Arc hole; 203. Groove; 301. Mounting ring; 302. Piston cylinder; 303. Connecting pipe; 4. Filling air bag; 401. Air pipe; 5. Sealing air bag. Detailed Implementation

[0023] The following describes one embodiment of this application in detail with reference to the accompanying drawings.

[0024] First implementation method:

[0025] Figures 1-4 The diagram shows a distillation column with negative pressure distillation conditions, including a column body 1, and further comprising:

[0026] A vacuum tube 101 is installed on the tower body 1; a partition 2 is connected inside the tower body 1, located above the vacuum tube 101, and has two sets of arc holes 202; a filling gas bag 4 is fixedly connected inside the arc holes 202, and a gas pipe 401 is connected to the filling gas bag 4 for inflating the filling gas bag 4, which fills the arc holes 202 and prevents gas from flowing out through them; a groove 203 is provided on the side of the partition 2. A sealing airbag 5 is connected inside the groove 203; the groove 203 communicates with the arc hole 202, and one end of the sealing airbag 5 is located inside the arc hole 202; multiple sets of piston cylinders 302 are fixedly connected inside the tower body 1, the telescopic end of the piston cylinder 302 is fixedly connected to the bottom of the partition 2, and a connecting pipe 303 is connected to the piston cylinder 302; an installation ring 301 is fixedly connected inside the tower body 1, and the piston cylinder 302 is fixedly connected to the installation ring 301; a one-way valve 201 is fixedly connected to the partition 2.

[0027] The heat-sensitive drug raw material requiring distillation and purification is placed at the feed inlet at the bottom of column 1. The raw material is slowly injected into column 1 through the delivery pipe. The vacuum pump connected to vacuum pipe 101 is turned on to begin extracting gas from the space above partition 2 inside column 1, gradually reducing the pressure in that space. Simultaneously, gas is injected into the filling bladder 4 through gas pipe 401. The filling bladder 4 rapidly expands, filling the arc hole 202, effectively blocking gas flow at the arc hole 202, and initially establishing a relatively independent vacuum area. During the expansion of the filling bladder 4, it compresses the sealing bladder 5 located in the groove 203 on the side of partition 2, causing the sealing bladder 5 to further tighten against the gap between partition 2 and the inner wall of the distillation column, thus sealing the gap... The filling process enhances the initial sealing of the entire vacuum area. As the distillation process progresses, the temperature inside the column gradually increases, and the gas inside the filling bladder 4 and sealing bladder 5 expands due to heat. This not only improves the filling effect of the filling bladder 4 on the arc hole 202, further blocking gas flow, but also allows the sealing bladder 5 to fill the gap between the partition 2 and the inner wall of the distillation column more tightly, greatly enhancing the sealing performance of the vacuum area. The raw material vapor generated by evaporation will be discharged upward through the one-way valve 201. The one-way valve 201 only allows the vapor to flow upward in one direction, effectively preventing vapor backflow and ensuring the smooth progress of the distillation process. During this period, the working status of the one-way valve 201 should be continuously monitored to ensure that it conducts steam normally.

[0028] If a vacuum area is not required, then when using the device, there is no need to inflate the air bladder 4.

[0029] Since the vaporization characteristics of raw materials are different at different stages, it is sometimes necessary to adjust the size of the vacuum area. For example, in the early stage of distillation, the amount of raw material vaporization is large. Hydraulic oil can be injected into the piston cylinder 302 through a set of connecting pipes 303 to push the extension end of the piston cylinder 302 upward, thereby driving the partition 2 to rise, increasing the space volume of the vacuum area, and providing more sufficient vaporization space for the raw material steam.

[0030] Since the temperature rise during distillation may cause pressure changes in the piston cylinder 302, which in turn causes the extension end of the piston cylinder 302 to move upward, affecting the stability of the vacuum area size, excess pressure in the piston cylinder 302 can be discharged through another set of connecting pipes 303 connected to the piston cylinder 302. Alternatively, depending on the actual situation, an appropriate amount of hydraulic oil can be added to the piston cylinder 302 through a pressure regulating device to maintain the pressure balance in the piston cylinder 302, avoid unnecessary movement of the extension end of the piston cylinder 302 due to temperature changes, and ensure the stability of the vacuum area size.

[0031] In light of current practical needs, the above-described embodiments adopted in this application are not limited to these. Any changes made within the scope of knowledge possessed by those skilled in the art without departing from the concept of this application still fall within the protection scope of this utility model.

Claims

1. A distillation column with negative pressure distillation conditions, comprising a column body (1), characterized in that, Also includes: A vacuum tube (101) is fixedly connected to the tower body (1) and located above the evaporation zone; A partition (2) is slidably connected inside the tower body (1). The partition (2) is located above the vacuum tube (101). Two sets of arc holes (202) are provided on the partition (2). An air-filled bladder (4) is fixedly connected inside the arc hole (202). An air tube (401) is fixedly connected to the air-filled bladder (4). The air tube (401) is used to inflate the air-filled bladder (4). The air-filled bladder (4) is used to fill the arc hole (202) and prevent gas from flowing out through the arc hole (202).

2. A distillation column with negative pressure distillation conditions according to claim 1, characterized in that, The partition (2) has a groove (203) on its side, and a sealing airbag (5) is fixedly connected in the groove (203).

3. A distillation column with negative pressure distillation conditions according to claim 2, characterized in that, The groove (203) is connected to the arc hole (202), and one end of the sealing airbag (5) is located inside the arc hole (202).

4. A distillation column with negative pressure distillation conditions according to claim 1, characterized in that, Multiple sets of piston cylinders (302) are fixedly connected inside the tower body (1). The telescopic end of the piston cylinder (302) is fixedly connected to the bottom of the partition plate (2). Two sets of connecting pipes (303) are fixedly connected to the piston cylinder (302).

5. A distillation column with negative pressure distillation conditions according to claim 4, characterized in that, An installation ring (301) is fixedly connected inside the tower body (1), and the piston cylinder (302) is fixedly connected to the installation ring (301).

6. A distillation column with negative pressure distillation conditions according to claim 1, characterized in that, A one-way valve (201) is fixedly connected to the partition (2).

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