Internal reflux automatic distillation device

Abstract

The utility model particularly relates to an internal reflux automatic distillation device which comprises a distillation still, a vertically arranged evaporator is arranged on a feeding pipe at the top of the distillation still, a vertically arranged distillation tower is arranged at the top of the distillation still and located on the side portion of the evaporator, and a condenser is connected to an outlet in the top of the distillation tower. An unpowered internal reflux device is arranged at the top of the distillation tower and located below the condenser, a horizontally-installed discharging pipe is communicated with the side portion of the distillation tower and located below the internal reflux device, the discharging pipe is communicated with a finished product receiving tank, and an automatic discharging control valve is installed on the discharging pipe. The bottom of the distillation kettle is communicated with a feeding hole in the top of the evaporator through a pipeline I, a circulating pump and a distillation kettle bottom intelligent control valve are arranged on the pipeline I, a raw material feeding pipe is further communicated with the pipeline I, and a distillation kettle intelligent feeding control valve is mounted on the raw material feeding pipe. Intelligent control and remote operation are achieved, and use is convenient.

Description

Technical Field

[0001] This utility model relates to the field of distillation equipment, specifically to an internal reflux automatic distillation device. Background Technology

[0002] Distillation is a thermodynamic separation process that utilizes the different boiling points of the components in a liquid mixture to evaporate the lower-boiling-point components and then condense them to separate the entire mixture.

[0003] In existing distillation apparatuses, the condenser is generally installed on the side of the distillation vessel and is not directly connected. A power unit is needed to transport the condensed liquid back to the distillation vessel for reflux, thereby improving the distillation efficiency. Summary of the Invention

[0004] This invention provides an automatic internal reflux distillation device.

[0005] The technical solution of this utility model is implemented as follows: An internal reflux automatic distillation device includes a distillation kettle, a vertically arranged evaporator installed on the feed pipe at the top of the distillation kettle, a vertically arranged distillation column installed on the top of the distillation kettle and on the side of the evaporator, a condenser connected to the outlet at the top of the distillation column, a non-powered internal reflux device installed on the top of the distillation column and below the condenser, a horizontally installed discharge pipe connected to the side of the distillation column and below the internal reflux device, the discharge pipe being connected to a finished product receiving tank, an automatic discharge control valve installed on the discharge pipe, a pipe connecting the bottom of the distillation kettle and the feed inlet at the top of the evaporator, a circulation pump and a smart control valve at the bottom of the distillation kettle installed on the pipe, a raw material feed pipe also connected to the pipe, and a smart feed control valve for the distillation kettle installed on the raw material feed pipe.

[0006] The non-powered internal reflux device includes a fixed ring, which is installed on the inner wall of the distillation column. A distributor is installed on the top of the fixed ring. The top and bottom of the distributor are both open funnel-shaped structures. Several support columns are fixedly connected to the outer circumferential side of the top opening of the distributor. A distributor is fixedly connected to the top of the support columns. The distributor is a conical structure with an open bottom and a closed top.

[0007] Several return pipes are evenly distributed on the outside of the distributor one. The return pipes all pass horizontally through the conical distributor one. One end of the return pipe is located above the fixed ring, and the other end of the return pipe is circumferentially connected to the connecting pipe. The bottom of the connecting pipe has a base plate, and the top of the connecting pipe has an open structure. The base plate has multiple return holes.

[0008] The discharge pipe is located at the bottom of the fixed ring. One end of the discharge pipe inside the distillation column is a closed structure. The discharge pipe is located at the bottom of the fixed ring and is connected to it.

[0009] Several redistributors are installed inside the distillation column.

[0010] The top outlet of the condenser is connected to a vacuum buffer tank via pipe two, and a vacuum intelligent control valve is installed on pipe two.

[0011] The finished product receiving tank and the distillation kettle are equipped with intelligent remote level gauges, and the distillation kettle is also equipped with an intelligent temperature sensor.

[0012] The side of the evaporator is connected to a steam inlet pipe and a steam outlet pipe. The steam inlet pipe is equipped with a steam intelligent regulating valve and an intelligent remote pressure gauge.

[0013] The technical solution of this utility model has the following positive effects: A vertically arranged condenser is installed at the top of the distillation column, and a non-powered internal reflux device is installed between the distillation column and the condenser. Internal reflux can be achieved without power drive, increasing the residence time of the liquid phase in the distillation column, improving separation efficiency, and obtaining a purer product. By recovering a portion of the liquid product as reflux, the amount of mixture requiring heating can be reduced, thus lowering energy consumption. The automatic discharge control valve intelligently adjusts the reflux flow rate and the amount of finished product collected in the column, making it intelligent and convenient. Several redistributors are installed inside the distillation column to prevent the internal reflux liquid from flowing onto the inner wall of the distillation column. The intelligent steam regulating valve, intelligent remote pressure gauge, intelligent remote level gauge, automatic discharge control valve, and intelligent feed control valve of the distillation kettle enable remote intelligent operation, making it more convenient and faster. Attached Figure Description

[0014] Figure 1 This is the front view of the present invention.

[0015] Figure 2 for Figure 1 Enlarged structural diagram at point A in the middle.

[0016] Figure 3 This is a top view of point A.

[0017] Reference numerals: 1. Distillation kettle; 2. Evaporator; 3. Distillation column; 4. Condenser; 5. Discharge pipe; 6. Finished product receiving tank; 7. Circulating pump; 8. Fixing ring; 9. Distributor 1; 10. Support column 1; 11. Distributor 2; 12. Intelligent temperature sensor; 14. Reflux pipe; 15. Connecting pipe; 16. Base plate; 17. Reflux hole; 18. Redistributor; 19. Intelligent remote level gauge; 20. Intelligent control valve at the bottom of the distillation kettle; 21. Intelligent feed control valve for the distillation kettle; 22. Steam inlet pipe; 23. Intelligent steam regulating valve; 24. Intelligent remote pressure gauge; 25. Automatic discharge control valve; 26. Vacuum intelligent control valve. Detailed Implementation

[0018] In the description of this utility model, it should be noted that, unless otherwise explicitly specified and limited, the terms "installed," "equipped with," and "connected," etc., should be interpreted broadly. For example, "connected" can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium; it can be a connection within two components. "Installed," "equipped with," and "connected" can employ conventional means in the prior art, such as integral installation, snap-fit ​​installation, welding connection, adhesive connection, bolted connection, etc. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances and select suitable connection, setting, or installation methods from the existing technology.

[0019] like Figure 1-3 As shown, an internal reflux automatic distillation device includes a distillation kettle 1, a vertically arranged evaporator 2 installed on the feed pipe at the top of the distillation kettle 1, a vertically arranged distillation column 3 installed on the top of the distillation kettle 1 and on the side of the evaporator 2, a condenser 4 connected to the outlet at the top of the distillation column 3, a non-powered internal reflux device installed on the top of the distillation column 3 and below the condenser 4, a horizontally installed discharge pipe 5 connected to the side of the distillation column 3 and below the internal reflux device, the outlet of the discharge pipe 5 connected to the finished product receiving tank 6, an automatic discharge control valve 25 installed on the discharge pipe 5, a pipe connecting the bottom of the distillation kettle 1 and the feed inlet at the top of the evaporator 2, a circulation pump 7 and a smart control valve 20 at the bottom of the distillation kettle installed on the pipe, a coarse material feed pipe connected to the pipe, a smart feed control valve 21 for the distillation kettle installed on the coarse material feed pipe.

[0020] Specifically, the intelligent feed control valve 21 and circulation pump 7 of the distillation kettle are opened to feed the distillation kettle 1. After the feed reaches a certain value, the intelligent feed control valve 21 of the distillation kettle is closed to stop feeding, and the intelligent control valve 20 at the bottom of the distillation kettle and circulation pump 7 are opened. Hot steam is introduced into the steam inlet pipe 22 of the evaporator 2. The hot steam circulates in the shell of the evaporator 2, and the raw material circulates in the pipe of the evaporator 2. After being heated by the evaporator 2, the raw material becomes gas and rises to the condenser 4. The condenser 4 is also a shell and tube type, and cooling water is introduced into it. The cooling water circulates in the shell. The heated gas enters from the pipe, and after condensation, it passes through the internal reflux device. The automatic discharge control valve 25 is set to intelligently adjust the reflux flow rate in the tower and the amount of finished product collected. Finally, it enters the finished product receiving tank 6 through the receiving pipe 5.

[0021] The non-powered internal reflux device includes a fixed ring 8, which is installed on the inner wall of the distillation column 3. A distributor 9 is installed on the top of the fixed ring 8. The top and bottom of the distributor 9 are both open funnel-shaped structures. Several support columns 10 are fixedly connected to the outer circumferential side of the top opening of the distributor 9. A second distributor 11 is fixedly connected to the top of the support columns 10. The second distributor 11 is a conical structure with an open bottom and a closed top. Several reflux pipes 14 are evenly distributed on the outside of the distributor 9. The reflux pipes 14 are all horizontally inserted. Through distributor 19, one end of reflux pipe 14 is located above fixed ring 8, and the other end of reflux pipe 14 is circumferentially connected to connecting pipe 15. The bottom of connecting pipe 15 has a base plate 16, and the top of connecting pipe 15 is an open structure. The base plate 16 has multiple reflux holes 17. The discharge pipe 5 is located at the bottom of fixed ring 8. The end of discharge pipe 5 inside the distillation column is a closed structure. Discharge pipe 5 is located at the bottom of fixed ring 8 and is connected to it. Holes are opened at the connection between fixed ring and discharge pipe 5 to connect the two.

[0022] Specifically, the raw material in the distillation kettle 1 is heated by hot steam in the evaporator 2 and rises to the condenser 4 through the internal reflux device. The rising path of the gas is as follows: it rises through the reflux hole 17 on the bottom plate 16, exits from the top outlet of the connecting pipe 15, then exits from the top outlet of the distributor 9, and finally rises to the condenser 4 through the gap between the support columns 10. After cooling, it becomes liquid and flows down from the top of the distributor 11 to the top of the fixed ring 8. The automatic discharge control valve 25 on the discharge pipe 5 is opened, and the finished product flows into the discharge pipe 5 from the connecting hole on the fixed ring 8 and enters the finished product receiving tank 6.

[0023] When the automatic discharge control valve 25 on the discharge pipe 5 is closed, and the condensed finished product is higher than the position of the reflux pipe 14, the finished product flows through the reflux pipe 14 into the connecting pipe 15 and finally back into the distillation column 3 through the reflux hole 17 on the bottom plate 16. Internal reflux can be achieved without a power unit. Internal reflux increases the residence time of the liquid phase in the distillation column 3, improves the separation efficiency, and obtains a purer product. By recovering part of the liquid product as reflux, the amount of mixture that needs to be heated can be reduced, and energy consumption can be reduced. The automatic discharge control valve 25 can be set in the central control room to intelligently adjust the reflux flow rate and the amount of finished product collected in the column.

[0024] Several redistributors 18 are installed inside the distillation column 3; specifically, the redistributors 18 are conical distributors, which can prevent the internal reflux liquid from flowing onto the inner wall of the distillation column 3.

[0025] The top outlet of condenser 4 is connected to a vacuum buffer tank via pipe 2, and a vacuum intelligent control valve 26 is installed on pipe 2. Specifically, before starting, the other valves need to be closed, and the vacuum intelligent control valve 26 in the central control room is opened to evacuate and check the system vacuum level.

[0026] The finished product receiving tank 6 and the distillation kettle 1 are equipped with intelligent remote level gauges 19, and the distillation kettle is also equipped with intelligent temperature sensors 12; the side of the evaporator 2 is equipped with a steam inlet pipe 22 and a steam outlet pipe, and the steam inlet pipe 22 is equipped with a steam intelligent regulating valve 23 and an intelligent remote pressure gauge 24; it is remotely intelligently controlled through the central control room.

[0027] The foregoing has shown and described the basic principles, main features, and advantages of this utility model. Those skilled in the art should understand that this utility model is not limited to the above embodiments. The embodiments and descriptions in the specification are merely illustrative of the principles of this utility model. Various changes and modifications can be made to this utility model without departing from its spirit and scope, and all such changes and modifications fall within the scope of the claimed utility model. The scope of protection of this utility model is defined by the appended claims and their equivalents.

Claims

1. An automatic internal reflux distillation apparatus, characterized in that: The apparatus includes a distillation kettle, a vertically mounted evaporator installed on the feed pipe at the top of the kettle, a vertically mounted distillation column installed on the top of the kettle and on the side of the evaporator, a condenser connected to the outlet at the top of the distillation column, a non-powered internal reflux device installed at the top of the distillation column and below the condenser, a horizontally mounted discharge pipe connected to the side of the distillation column and below the internal reflux device, the discharge pipe connected to a finished product receiving tank, an automatic discharge control valve installed on the discharge pipe, a pipe connecting the bottom of the distillation kettle to the feed inlet at the top of the evaporator, a circulation pump and a smart control valve at the bottom of the distillation kettle installed on the pipe, and a raw material feed pipe connected to the pipe, on which a smart feed control valve for the distillation kettle is installed.

2. The automatic internal reflux distillation apparatus according to claim 1, characterized in that: The non-powered internal reflux device includes a fixed ring, which is installed on the inner wall of the distillation column. A distributor is installed on the top of the fixed ring. The top and bottom of the distributor are both open funnel-shaped structures. Several support columns are fixedly connected to the outer circumferential side of the top opening of the distributor. A distributor is fixedly connected to the top of the support columns. The distributor is a conical structure with an open bottom and a closed top.

3. The automatic internal reflux distillation apparatus according to claim 2, characterized in that: Several return pipes are evenly distributed on the outside of the distributor one. The return pipes all pass horizontally through the conical distributor one. One end of the return pipe is located above the fixed ring, and the other end of the return pipe is circumferentially connected to the connecting pipe. The bottom of the connecting pipe has a base plate, and the top of the connecting pipe has an open structure. The base plate has multiple return holes.

4. The automatic internal reflux distillation apparatus according to claim 3, characterized in that: The discharge pipe is located at the bottom of the fixed ring. One end of the discharge pipe inside the distillation column is a closed structure. The discharge pipe is located at the bottom of the fixed ring and is connected to it.

5. The automatic internal reflux distillation apparatus according to claim 4, characterized in that: Several redistributors are installed inside the distillation column.

6. The automatic internal reflux distillation apparatus according to claim 1, characterized in that: The top outlet of the condenser is connected to a vacuum buffer tank via pipe two, and a vacuum intelligent control valve is installed on pipe two.

7. The automatic internal reflux distillation apparatus according to claim 1, characterized in that: The finished product receiving tank and the distillation kettle are equipped with intelligent remote level gauges, and the distillation kettle is also equipped with an intelligent temperature sensor.

8. The automatic internal reflux distillation apparatus according to claim 3, characterized in that: The side of the evaporator is connected to a steam inlet pipe and a steam outlet pipe. The steam inlet pipe is equipped with a steam intelligent regulating valve and an intelligent remote pressure gauge.

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