CN102909106A - Reduced-pressure distillation device - Google Patents

Abstract

The invention discloses a simple-structured, economical and convenient vacuum distillation device, comprising a distillation head, the distillation head includes a steam pipe, a water distribution pipe and a connecting pipe, the steam pipe has an upper port and a lower port, the water distribution pipe has an upper port, the water distribution pipe The lower end of the branch pipe is connected with the branch pipe with control valve I for the liquid outflow of the water distribution pipe. The outer end of the branch pipe has an outer port. The connecting pipe is used to connect the upper end of the steam pipe and the upper end of the water distribution pipe. Return pipe with control valve II; a thermometer is inserted into the upper port of the steam pipe, the lower port of the steam pipe is directly connected to the distillation vessel or connected to the distillation vessel through a rectification column, the upper port of the water distribution pipe is connected to the condenser, and the outer port of the branch pipe is The receiving container is connected through the vacuum receiving head, the upper end of the condenser and the vacuum receiving head are both connected to the suction pipe, and the suction pipe is connected to the vacuum pump.

Description

A vacuum distillation device

technical field

The invention relates to a vacuum distillation device.

Background technique

Figure 1 is a vacuum distillation device. The current vacuum distillation device is a complex monolithic structure with high manufacturing costs, and damage to a certain point will lead to damage to the entire instrument. In addition, during the distillation process, bumping sometimes occurs, causing product contamination and resulting in failure of the distillation operation.

Invention content

The technical problem to be solved by the present invention is to provide a vacuum distillation device with simple structure, economy and convenience.

In order to solve the problems of the technologies described above, the technical solution of the present invention is:

A vacuum distillation device, comprising a distillation head, the distillation head includes a steam pipe, a water distribution pipe and a connecting pipe, the steam pipe has an upper port and a lower port, the water distribution pipe has an upper port, the lower end of the water distribution pipe and the outlet for the liquid outflow of the water distribution pipe The branch pipe with control valve Ⅰ is connected, and the outer end of the branch pipe has an external port. The connecting pipe is used to connect the upper end of the steam pipe and the upper end of the water distribution pipe. A return pipe with control valve Ⅱ is arranged below the connecting pipe to connect the lower end of the water distribution pipe and the steam pipe; the steam pipe A thermometer is inserted into the upper port, the lower port of the steam pipe is directly connected to the distillation vessel or connected to the distillation vessel through a rectification column, the upper port of the water distribution pipe is connected to the condenser, and the outer port of the branch pipe is connected to the receiving vessel and the condenser through the vacuum receiving head. Both the upper end and the vacuum receiving head are connected to the suction pipe, and the suction pipe is connected to the vacuum pump.

In the above vacuum distillation device, the distillation container is a distillation bottle, the condenser is a condenser tube, and the receiving container is a receiving bottle.

In the above-mentioned vacuum distillation device, the branch pipe and the return pipe are straight pipes as a whole, the outer port of the branch pipe is inclined downward, and a connection support for reinforcement is provided between the branch pipe and the water distribution pipe.

In the above vacuum distillation device, the pipe diameters of the branch pipe and the return pipe are smaller than other pipe diameters.

In the above vacuum distillation device, the suction pipe is a suction hose.

Compared with the existing vacuum distillation device, the vacuum distillation device of the present invention is assembled from a plurality of parts. When a part is damaged, only the corresponding part needs to be replaced, which has the advantages of simple structure, economy and convenience.

Description of drawings

Below in conjunction with accompanying drawing, specific embodiment of the present invention is described in further detail:

Fig. 1 is existing vacuum distillation unit.

Fig. 2 is the vacuum distillation device of the present invention.

Fig. 3 is a schematic structural diagram of the distillation head in Fig. 2 .

Fig. 4 is another kind of vacuum distillation device.

In the figure: 1 steam pipe, 2 water distribution pipe, 3 connecting pipe, 4 branch pipes, 5 control valve Ⅰ, 6 return pipe, 7 control valve Ⅱ, 8 connecting support, 9 thermometer, 10 distillation bottle, 11 receiving bottle, 12 vacuum receiving Head, 13 suction pipe, 14 condenser pipe, 15 rectification column.

Detailed ways

As shown in Fig. 2, Fig. 3 and Fig. 4, a kind of vacuum distillation device comprises distillation head, and distillation head comprises steam pipe 1, water distribution pipe 2 and connection pipe 3, and steam pipe has upper port and lower port, and water distribution pipe has The upper port, the lower end of the water distribution pipe communicates with the branch pipe 4 with the control valve I5 for the liquid outflow of the water distribution pipe. The lower end of the water pipe and the return pipe 6 of the band control valve II7 of the steam pipe. A thermometer 9 is inserted into the upper port of the steam pipe, and the lower port of the steam pipe is directly connected to the distillation vessel or communicated with the distillation vessel via a rectification column 15. The upper port of the water distribution pipe is connected to the condenser, and the outer port of the branch pipe is connected to the vacuum receiving head 12. The receiving container, the upper end of the condenser and the vacuum receiving head are all connected to the suction pipe 13, and the suction pipe is connected to the vacuum pump.

For chemical experiment equipment: the distillation container is a distillation bottle 10, the condenser is a condenser tube 14, and the receiving container is a receiving bottle 11.

Specifically, the branch pipe and the return pipe are straight pipes as a whole, the outer port of the branch pipe is inclined downward, and a connection support 8 for reinforcement is provided between the branch pipe and the water distribution pipe.

Specifically, the pipe diameters of the branch pipe and the return pipe are smaller than other pipe diameters.

Specifically, the suction pipe is a suction hose.

Compared with the vacuum distillation device shown in Figure 1, this vacuum distillation device is assembled from multiple parts. When a part is damaged, only the corresponding part needs to be replaced, which has the advantages of simple structure, economy and convenience.

The present invention can also realize anti-knocking, close the control valve I and the control valve II when the fraction is collected, the fraction accumulates in the water distribution pipe, and when the fraction accumulates to a proper height, the control valve I is opened, and the fraction is put into the receiving bottle. In the first process, if bumping occurs, open the control valve II, put the bumping liquid back into the distillation vessel through the return pipe, and return to the distillate temperature again. During this process, the pipeline pollution caused by bumping is also cleaned. Then close the control valve II and repeat the fraction collection operation. In addition, by controlling the opening of control valve I and control valve II, the reflux ratio can be adjusted to control the collection of fractions.

Claims (5)

1. A vacuum distillation device, comprising a distillation head, is characterized in that: the distillation head includes a steam pipe, a water distribution pipe and a connecting pipe, the steam pipe has an upper port and a lower port, the water distribution pipe has an upper port, the lower end of the water distribution pipe and a supply pipe The branch pipe with control valve I used for the liquid outflow of the water distribution pipe is connected. The outer end of the branch pipe has an outer port. The connecting pipe is used to connect the upper end of the steam pipe and the upper end of the water distribution pipe. The lower end of the connecting pipe is provided with a control valve II connected with the lower end of the water distribution pipe and the steam pipe. A thermometer is inserted into the upper port of the steam pipe, the lower port of the steam pipe is directly connected to the distillation vessel or connected to the distillation vessel through a rectification column, the upper port of the water distribution pipe is connected to the condenser, and the outer port of the branch pipe passes through the vacuum receiving head Connect to the receiving container, the upper end of the condenser and the vacuum receiving head are connected to the suction pipe, and the suction pipe is connected to the vacuum pump. 2. The vacuum distillation device according to claim 1, characterized in that: the distillation vessel is a distillation bottle, the condenser is a condenser tube, and the receiving vessel is a receiving bottle. 3. The vacuum distillation device according to claim 1 or 2, characterized in that: the branch pipe and the return pipe are straight pipes as a whole, the outer port of the branch pipe is inclined downward, and a connection for reinforcement is provided between the branch pipe and the water distribution pipe support. 4. The vacuum distillation device according to claim 1 or 2, characterized in that: the pipe diameters of the branch pipe and the return pipe are smaller than other pipe diameters. 5. The vacuum distillation device according to claim 1 or 2, characterized in that: the suction pipe is a suction hose.

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