CN210138475U

CN210138475U - Rectifying tower for recovering solvent

Info

Publication number: CN210138475U
Application number: CN201920512436.7U
Authority: CN
Inventors: 张嘉俊; 孙爱华
Original assignee: Wenzhou Tianwo Machinery Technology Co ltd
Current assignee: Wenzhou Tianwo Machinery Technology Co ltd
Priority date: 2019-04-16
Filing date: 2019-04-16
Publication date: 2020-03-13
Anticipated expiration: 2029-04-16

Abstract

The utility model discloses a rectifying column for retrieving solvent relates to production extraction element technical field, and its technical scheme main points are: the device comprises a distillation kettle for containing a liquid mixture, a distillation tower with one end connected with the distillation kettle, a condenser connected with the other end of the distillation tower, a cooler connected with the condenser through a guide pipe, a plurality of storage tanks respectively connected with the cooler through branch pipes and a PLC control box, wherein the temperature in the condenser is higher than the temperature in the cooler, a return pipe is connected with the guide pipe, one end of the return pipe, which is far away from the end connected with the guide pipe, is connected to the distillation tower, and the distillation kettle, the condenser, the cooler and the storage tanks are all electrically connected with the PLC control box; has the functions of improving the recovery rate of the liquid mixture and providing the recovery performance of the liquid mixture.

Description

Rectifying tower for recovering solvent

Technical Field

The utility model relates to a production extraction element technical field, more specifically says that it relates to a rectifying column for retrieving solvent.

Background

Rectification is a distillation method for separating a liquid mixture with high purity by utilizing reflux, is the separation operation of the liquid mixture with the widest industrial application, and is widely applied to the departments of petroleum, chemical industry, light industry, food, metallurgy and the like; some energy-saving coupling rectifying towers have been developed at home and abroad: such as a column in which reaction and rectification are coupled, a column in which rectification and other separation processes are coupled (adsorption-rectification coupling, crystallization-rectification coupling, etc.); rectification-rectification coupled column: a thermally coupled rectifying tower, an internal thermally coupled rectifying tower and a partition plate rectifying tower.

For example, a methanol rectifying tower disclosed in chinese patent No. CN203971431U, published as 2014, 12 and 3 comprises a distillation still containing a liquid mixture, wherein a heating layer for heating the liquid mixture is arranged at the outer bottom of the distillation still; the top end of the distillation kettle is communicated with the bottom end of the tower section through a pipeline; the finished product tank is communicated with the top end of the tower section through a pipeline; the circulating cold water sleeve is coated on the pipeline between the finished product tank and the tower section and is used for condensing the methanol in the pipeline; and the secondary condensation sleeve is coated on the pipeline between the finished product tank and the tower section, the secondary condensation sleeve is positioned at the downstream position of the circulating cold water sleeve, and the temperature of fluid in the secondary condensation sleeve is lower than that of fluid in the circulating cold water sleeve.

The separation is realized by utilizing the difference of the boiling points of all components, the liquid methanol after chemical treatment is placed in a distillation kettle, then the distillation kettle is heated to about 68 ℃ to evaporate the methanol in the distillation kettle, and then circulating cold water is sleeved outside a circulating pipeline of the distillation kettle to condense and store the methanol component in the distillation kettle into a finished product tank, but a mixture of a plurality of different substances exists in the separation of the liquid mixture, the device can only recycle the methanol in the liquid mixture, the recycling rate is low, and the recycling performance of the liquid mixture is wasted.

SUMMERY OF THE UTILITY MODEL

The utility model aims to provide a not enough to prior art exists, the utility model aims to provide a rectifying column for retrieving solvent has the improvement to liquid mixture recycle rate, provides its recovery performance's effect.

In order to achieve the above purpose, the utility model provides a following technical scheme:

the utility model provides a rectifying column for retrieving solvent, including the stills that is used for splendid attire liquid mixture, the distillation column that one end and stills are connected, connect in the condenser of the distillation column other end, through cooler, a plurality of storage jar and the PLC control box that are connected with the cooler through the branch pipe respectively that the pipe is connected with the condenser, the temperature is higher than in the condenser temperature setting in the cooler, pipe department is connected with the back flow, the back flow is kept away from and is connected on the distillation column with pipe connection's one end, stills, condenser, cooler and storage jar all are connected with the PLC control box electricity.

The liquid mixture is placed in a distillation kettle, the boiling point of the substance is separated by distillation according to the requirement, and the temperature in the distillation kettle is controlled to be adjusted to the corresponding temperature through a PLC control box so as to evaporate the substance; then the gas is conveyed to a condenser through a distillation tower for condensation treatment, so that the gaseous substance is initially cooled through the condenser and then is changed into a gas-liquid mixture which is conveyed in a guide pipe continuously; during the period, part of the gaseous substances are sent into the distillation tower through the return pipe to be condensed again, and the other part of the gas-liquid mixture is cooled again through the cooler; the gas after distillation and separation is finally changed into liquid substance and is conveyed into a corresponding storage tank through a branch pipe, so that the purpose of separation is achieved; through the different boiling points to waiting to separate the material in the liquid mixture, make its PLC control box control temperature regulation to different temperatures in the stills, and retrieve to different holding vessel through different branch pipes, have the improvement and to liquid mixture recycle ratio, provide its recovery performance's effect.

Further setting: the distillation column includes multistage interconnect's interior barrel, and the multistage the internal temperature of inner tube is followed stills and is decreased progressively towards the condenser direction and set up, the multistage interior barrel is connected with respectively the back flow, and many the back flow is kept away from the one end of being connected with interior barrel and is assembled the back with pipe connection.

So set up, through set the distillation column to the temperature from stills in the multistage that the condenser direction degressive gradually, make its inner tube internal temperature that is closest to the condenser direction be required distillation isolated substance boiling point temperature range, but in the material in this temperature range becomes liquid state heavy back stills, improve the accuracy of treating the distillation isolated substance, improve the effect of its distillation precision, have the improvement and retrieve the utilization ratio to liquid mixture, provide the effect of its recovery performance.

Further setting: the reflux pipes are respectively provided with a first pneumatic valve, the convergence sections of the reflux pipes are connected with a second pneumatic valve, and the first pneumatic valve and the second pneumatic valve are electrically connected with the PLC control box.

So set up, through first pneumatic valve of PLC control box control, second pneumatic valve, reach in controlling corresponding gaseous mixture or gas-liquid mixture flow direction corresponding distillation column or the pipe, improve the effect of its distillation stability and distillation precision.

Further setting: and a plurality of sections of first thermometers are respectively arranged in the inner cylinder body and are electrically connected with the PLC control box.

So set up, through first thermometer and then the internal temperature of real time monitoring multistage inner tube to adjust in real time through the PLC control box, improve the control to the temperature in the distillation column, and then improve the distillation separation effect of rectifying column.

Further setting: and a second temperature instrument is arranged at a port of the distillation tower connected towards the condenser.

So set up, be convenient for carry out the real-time detection of temperature to entering the condensation process soon, improve the distillation separation effect of its rectifying column.

Further setting: the condenser is connected with a vacuum pump.

So set up, be in condenser inner loop cooling through the comdenstion water of vacuum pump in with the water tank, realize carrying out the purpose of preliminary cooling condensation to distillation material.

Further setting: the cooler includes the casing and sets up the cooling tube in the casing, the cooling tube be the bolt form arrange in the casing, the one end and the pipe connection of cooling tube, the other end and branch connection.

By the arrangement, the condensed distillation substance is cooled again through the cooling pipe in the shell, so that a gas-liquid mixture of the condensed distillation substance is changed into a liquid substance, and the aim of distillation and separation is fulfilled; meanwhile, the cooling effect is improved through the bolt-shaped cooling pipe.

Further setting: and the branch pipes are provided with pipeline lenses.

So set up, reach through the effect of being convenient for observe the interior liquid state of cooling back of bronchus through pipeline lens.

Further setting: an electric heating pipe is arranged in the outer wall of the distillation kettle and is electrically connected with the PLC control box.

According to the arrangement, the temperature of the electric heating tube is controlled through the PLC control box, so that the temperature in the distillation kettle is controlled, and the purpose of controlling different substances in the liquid mixture to be at different boiling points for evaporation is achieved.

Further setting: and the branch pipes are provided with switch valves.

So set up, be convenient for through the ooff valve to the liquid of distillation after the separation cooling store the effect in the holding vessel.

By adopting the technical scheme, the utility model discloses relative prior art compares, has following advantage:

1. the PLC control box controls the temperature in the distillation kettle to be adjusted to different temperatures by different boiling points of substances to be separated in the liquid mixture, and the substances are recovered to different storage tanks through different branch pipes, so that the recovery rate of the liquid mixture is improved, and the recovery performance of the liquid mixture is improved;

2. the temperature in the inner cylinder body closest to the direction of the condenser is within the boiling point temperature range of the substances to be distilled and separated, so that the accuracy of the substances to be distilled and separated is improved, and the distillation precision of the substances to be distilled and separated is improved;

3. the first pneumatic valve, the second pneumatic valve, the first temperature instrument and the second temperature instrument are controlled through the PLC control box, the purposes of real-time monitoring and adjustment are achieved, and the distillation separation effect of the rectifying tower is improved.

Drawings

Fig. 1 is a schematic view of a rectifying column for recovering a solvent.

In the figure: 1. a distillation kettle; 11. an electric heating tube; 2. a distillation column; 21. an inner cylinder; 22. a first temperature meter; 23. a second temperature meter; 3. a condenser; 31. a vacuum pump; 32. a water tank; 4. a cooler; 41. a housing; 42. a cooling tube; 5. a conduit; 6. a branch pipe; 61. a tunnel lens; 62. an on-off valve; 7. storing the tank; 8. a PLC control box; 9. a return pipe; 91. a first pneumatic valve; 92. a second pneumatic valve.

Detailed Description

The rectifying column for recovering the solvent is further described with reference to the accompanying drawings.

A rectifying tower for recovering a solvent comprises a distillation kettle 1 for containing a liquid mixture, a distillation tower 2 with one end connected with the distillation kettle 1, a condenser 3 connected with the other end of the distillation tower 2, a cooler 4 connected with the condenser 3 through a conduit 5, a plurality of storage tanks 7 respectively connected with the cooler 4 through branch pipes 6, and a PLC control box 8 for controlling the whole operation of the rectifying tower, wherein the distillation tower 2 is connected with the other end of the distillation tower 2; the guide pipe 5 is connected with a return pipe 9, one end of the return pipe 9 far away from the guide pipe 5 is connected to the distillation tower 2, and the distillation kettle 1, the condenser 3, the cooler 4 and the storage tank 7 are electrically connected with the PLC control box 8.

As shown in fig. 1, an electric heating tube 11 is arranged in the outer wall of the distillation still 1, and the electric heating tube 11 is electrically connected with the PLC control box 8; the heating temperature of the electric heating tube 11 is controlled by the PLC control box 8, so that the purpose of accurately controlling the boiling points of different liquid mixtures in the distillation kettle 1 is realized.

The distillation tower 2 comprises a plurality of sections of inner cylinders 21 which are connected with each other, the temperature in the plurality of sections of inner cylinders 21 is gradually decreased from the distillation still 1 to the condenser 3, and the temperature in the inner cylinder 21 closest to the condenser 3 is within the boiling temperature range of the substances to be distilled and separated; and be provided with first thermometer 22 in barrel 21 in the multistage respectively, be provided with second thermometer 23 at the port department that distillation column 2 connects towards condenser 3, first thermometer 22 and second thermometer 23 all are connected with PLC control box 8 electricity, realize the purpose of real time monitoring and regulation.

Condenser 3 is connected with vacuum pump 31, and vacuum pump 31 is connected with water tank 32, is in condenser 3 internal recycle cooling through the comdenstion water of vacuum pump 31 in with water tank 32, realizes carrying out the purpose of the condensation of tentatively cooling to distillation material.

A plurality of return pipes 9 are arranged and correspond to the plurality of sections of the inner cylinder 21 one by one, and the plurality of return pipes 9 are converged at the ends far away from the ends connected with the inner cylinder 21 and then connected with the guide pipe 5; in order to guide the flow of the condensed materials in the return pipes 9 and the guide pipe 5, first pneumatic valves 91 are respectively arranged on the return pipes 9, a second pneumatic valve 92 is connected to the convergence section of the return pipes 9, and the first pneumatic valves 91 and the second pneumatic valves 92 are electrically connected with the PLC control box 8.

The cooler 4 includes a housing 41 and a cooling pipe 42 provided in the housing 41; the cooling pipe 42 is arranged in the shell 41 in a bolt shape, one end of the cooling pipe 42 is connected with the guide pipe 5, and the other end is connected with the branch pipe 6; at the same time, the temperature in the condenser 3 is set higher than the temperature in the cooler 4.

The plurality of branch pipes 6 are connected to the storage tank 7 in a one-to-one correspondence manner, and the branch pipes 6 are provided with pipe lenses 61 which facilitate observation of the cooled liquid state in the branch pipes 6, and the branch pipes 6 are provided with switching valves 62.

The working principle is as follows: firstly, putting a liquid mixture into a distillation kettle 1, distilling and separating the boiling point of a substance according to the requirement, adjusting the temperature to a corresponding temperature to evaporate the substance, conveying the substance to a condenser 3 through a distillation tower 2 for condensation treatment, primarily cooling the gaseous substance through the condenser 3 to obtain a gas-liquid mixture, and continuously conveying the gas-liquid mixture through a conduit 5; during the period, part of the gaseous substances enter the distillation tower 2 through the return pipe 9 to be condensed again, and the other part of the gas-liquid mixture is cooled again through the cooler 4; finally, the gas after distillation and separation is changed into liquid substance and is conveyed into a storage tank 7 through a branch pipe 6, so as to achieve the purpose of separation; through treating the different boiling points of separating material, make the temperature regulation to different temperatures in its PLC control box 8 control stills 1, and reflux to barrel 21 in the distillation column 2 difference through different back flows 9, retrieve to different storage jar 7 in through different branch pipes 6 of rethread, have the improvement to liquid mixture recycle rate, provide its recovery performance's effect.

The embodiments of the present invention are preferred embodiments of the present invention, and the scope of the present invention is not limited by these embodiments, so: all equivalent changes made according to the structure, shape and principle of the invention are covered by the protection scope of the invention.

Claims

1. A rectifying column for recovering a solvent, characterized in that: including distillation column (2) that distillation column (1), one end and distillation column (1) that are used for splendid attire liquid mixture are connected, connect in condenser (3) of distillation column (2) other end, cooler (4) be connected with condenser (3) through pipe (5), a plurality of storage jar (7) and PLC control box (8) of being connected with cooler (4) through branch pipe (6) respectively, the temperature is higher than in condenser (3) temperature setting in cooler (4), pipe (5) department is connected with back flow (9), back flow (9) are kept away from the one end of being connected with pipe (5) and are connected on distillation column (2), distillation column (1), condenser (3), cooler (4) and storage jar (7) all are connected with PLC control box (8) electricity.

2. The rectification column for recovering a solvent according to claim 1, characterized in that: the distillation column (2) comprises a plurality of sections of interconnected inner cylinders (21), the temperature in the inner cylinders (21) is gradually decreased from the distillation still (1) to the condenser (3), the sections of the inner cylinders (21) are respectively connected with the return pipe (9) and a plurality of the return pipes (9) are connected with the guide pipe (5) after one end connected with the inner cylinders (21) is gathered.

3. The rectification column for recovering a solvent according to claim 2, characterized in that: the device is characterized in that a plurality of return pipes (9) are respectively provided with a first pneumatic valve (91), the convergence section of each return pipe (9) is connected with a second pneumatic valve (92), and the first pneumatic valve (91) and the second pneumatic valve (92) are electrically connected with a PLC control box (8).

4. The rectification column for recovering a solvent according to claim 2 or 3, characterized in that: the multi-section inner cylinder body (21) is internally provided with a first temperature instrument (22) respectively, and the first temperature instrument (22) is electrically connected with the PLC control box (8).

5. The rectification column for recovering a solvent according to claim 1, characterized in that: and a second temperature instrument (23) is arranged at a port of the distillation tower (2) connected towards the condenser (3).

6. The rectification column for recovering a solvent according to claim 1, characterized in that: the condenser (3) is connected with a vacuum pump (31).

7. The rectification column for recovering a solvent according to claim 1, characterized in that: cooler (4) include casing (41) and set up cooling tube (42) in casing (41), cooling tube (42) are the bolt form and arrange in casing (41), the one end and the pipe (5) of cooling tube (42) are connected, and the other end is connected with branch pipe (6).

8. The rectification column for recovering a solvent according to claim 1, characterized in that: and the branch pipes (6) are provided with pipeline lenses (61).

9. The rectification column for recovering a solvent according to claim 1, characterized in that: an electric heating tube (11) is arranged in the outer wall of the distillation kettle (1), and the electric heating tube (11) is electrically connected with the PLC control box (8).

10. The rectification column for recovering a solvent according to claim 1, characterized in that: the branch pipes (6) are provided with switch valves (62).