Tetrahydrofuran recovery device

Abstract

The utility model discloses a tetrahydrofuran recovery device, which belongs to the technical field of chemical production and comprises a distillation box, bottom blocks are symmetrically and fixedly arranged on the peripheral side of the distillation box, electric push rods are fixedly arranged on the top surfaces of the two bottom blocks, a transverse plate is transversely and fixedly arranged at the output ends of the two electric push rods, and the transverse plate is transversely arranged above the distillation box. Vertical plates are symmetrically, longitudinally and fixedly arranged on the bottom surface of the transverse plate, the free ends of the two vertical plates penetrate into an inner cavity of the distillation box, round blocks are fixedly arranged at the ends, located in the inner cavity of the distillation box, of the two vertical plates, the center positions of the round blocks are hollowed out, and cleaning plates used for cleaning the inner wall of the distillation box are connected to the peripheral sides of the round blocks; a plurality of heat conduction rods are fixedly arranged on the top face of the round block at equal intervals, and the inner wall of each heat conduction rod is connected with an electric heating wire used for heating tetrahydrofuran. According to the tetrahydrofuran recovery device, the problem that when the liquid level is high, more energy consumption and time are needed to cover the whole tetrahydrofuran with heat is solved, and the tetrahydrofuran recovery efficiency is improved.

Description

Technical Field

[0001] The utility model belongs to the technical field of chemical production, in particular to a tetrahydrofuran recovery device. Background Art

[0002] Tetrahydrofuran is a class of heterocyclic organic compounds. It is one of the strong polar ethers and the complete hydrogenation product of the aromatic compound furan. It is a colorless volatile liquid. In order to save resources, tetrahydrofuran will be recycled. Since tetrahydrofuran has the characteristics of low boiling point and high volatility, it is mostly recycled by distillation. Traditional high-temperature distillation often uses electric heating. However, most of the heating structures are now fixed on the inner bottom surface of the distillation box, and the heating height cannot be adjusted according to the liquid level of the raw materials in the distillation box. It is easy to cause the heating structure on the inner bottom surface to be difficult to quickly heat the entire distillation box. When the liquid level is high, the heating structure will first heat the lower half, and then transfer to the upper half for heating, which requires more energy consumption and time to cover the tetrahydrofuran in the entire distillation box with heat, thereby reducing the efficiency of tetrahydrofuran recovery.

[0003] For example, the existing Chinese announcement number is: CN216571609U tetrahydrofuran high-pressure distillation tower device, which: "comprising a base, a heating furnace is fixedly installed at the bottom end of the base, a support assembly is fixedly installed on the right side of the upper end of the base, a fixed cabinet is fixedly installed on the left side of the upper end of the base, and a distillation tower body is fixedly installed inside the support assembly."

[0004] It can be seen that the cited patent document has the problem that it is difficult to quickly cover the tetrahydrofuran in the entire distillation box with heat. Utility Model Content

[0005] The utility model aims to provide a tetrahydrofuran recovery device to solve the problems raised in the background technology.

[0006] To achieve the above-mentioned purpose, the utility model provides the following technical solutions: a tetrahydrofuran recovery device, comprising a distillation box, wherein a bottom block is symmetrically fixed on the circumferential side of the distillation box, and electric push rods are fixed on the top surfaces of the two bottom blocks, and a horizontal plate is transversely fixed on the output ends of the two electric push rods, and the horizontal plate is transversely arranged above the distillation box, and the bottom surfaces of the horizontal plates are symmetrical and vertical plates are fixed longitudinally, and the free ends of the two vertical plates both penetrate into the inner cavity of the distillation box, and a round block is fixed at one end of the two vertical plates located in the inner cavity of the distillation box, and the center position of the round block is hollowed out, and a cleaning plate for cleaning the inner wall of the distillation box is connected to the circumferential side of the round block, and a plurality of heat-conducting rods are equidistantly fixed on the top surface of the round block, and the positions of the plurality of heat-conducting rods are arranged in a circular array, and the inner wall of each of the heat-conducting rods is connected to a heating wire for heating tetrahydrofuran.

[0007] Preferably, the inner bottom surface of the distillation box is installed with a heat conducting rod and a heating wire having the same connection structure as the top surface of the round block, and the top surface of the distillation box is fixedly provided with a driving motor.

[0008] Preferably, the output end of the driving motor passes through the distillation box and is connected to a rotating shaft, and a plurality of stirring rods for stirring tetrahydrofuran are equidistantly connected to the circumference of the rotating shaft.

[0009] Preferably, a feed pipe is connected to the circumference of the distillation box, and an L-shaped bracket is symmetrically fixed on the circumference of the feed pipe and below the feed pipe.

[0010] Preferably, a rotating block is provided between the two brackets via a rotating rod, and a baffle for limiting the feed pipe is fixedly provided on the top surface of the rotating block.

[0011] Preferably, a side surface of the baffle away from the rotating block and a side surface of the feed pipe away from the two brackets are both fixed with rectangular blocks, and a screw hole is provided on one side surface of the two rectangular blocks.

[0012] Preferably, the inner cavities of the two aligned screw holes are threadedly connected with bolts, and a drainage pipe for conveying steam is connected to the top surface of the distillation box and located on one side of the driving motor.

[0013] Compared with the prior art, the technical effects and advantages of the utility model are as follows:

[0014] The tetrahydrofuran recovery device can heat the tetrahydrofuran in the distillation box by arranging multiple heat-conducting rods and multiple heating wires, and the baffle can restrict the feed pipe to prevent the heated steam from being discharged from the feed pipe.

[0015] By setting the horizontal plate, the vertical plate and the round block, and cooperating with the electric push rod, the heat-conducting rod and the heating wire at the top can be driven to move upward, so that the heat-conducting rod and the heating wire at the top can be separated from the heat-conducting rod and the heating wire at the bottom, so that the separated multiple heat-conducting rods and the heating wires can heat tetrahydrofuran in sections and synchronously, so that the whole tetrahydrofuran can be quickly heated and evaporated, avoiding the situation that when the liquid level is high, the heating structure at the inner bottom surface will first heat the tetrahydrofuran in the lower half, and then heat the tetrahydrofuran transferred to the upper half, so that more energy resources and time are needed to heat the whole tetrahydrofuran, thereby improving the efficiency of tetrahydrofuran recovery. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] In order to more clearly illustrate the specific implementation methods of the utility model or the technical solutions in the prior art, the drawings required for use in the specific implementation methods or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are some implementation methods of the utility model. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0017] Figure 1 It is a schematic diagram of the structure of the utility model;

[0018] Figure 2 It is a structural schematic diagram of the vertical plate and the round block of the utility model;

[0019] Figure 3 It is a cross-sectional view of the distillation box of the utility model;

[0020] Figure 4 It is a schematic structural diagram of the feed pipe and baffle of the utility model.

[0021] Description of reference numerals:

[0022] In the figure: 1. distillation box; 2. bottom block; 3. electric push rod; 4. horizontal plate; 5. vertical plate; 6. round block; 7. cleaning plate; 8. heat conducting rod; 9. heating wire; 10. driving motor; 11. rotating shaft; 12. stirring rod; 13. drainage pipe; 14. feeding pipe; 15. bracket; 16. rotating block; 17. baffle; 18. rectangular block; 19. bolt. DETAILED DESCRIPTION

[0023] In the following description, a large number of specific details are given to provide a more thorough understanding of the utility model. However, it is obvious to those skilled in the art that the utility model can be implemented without one or more of these details. In other examples, in order to avoid confusion with the utility model, some technical features known in the art are not described.

[0024] Unless otherwise defined, the directions of up, down, left, right, front, back, inside and outside involved in this document are based on the directions of up, down, left, right, front, back, inside and outside in the figures shown in the present utility model, and are explained here together.

[0025] The connection method can be bonding, welding, bolt connection, etc., depending on actual needs.

[0026] like Figures 1 to 4A tetrahydrofuran recovery device shown in the figure includes a distillation box 1, the bottom surface of the distillation box 1 is installed with legs to raise the height of the distillation box 1, the peripheral side of the distillation box 1 is connected with a feed pipe 14, the top surface of the distillation box 1 and one side of the driving motor 10 is connected with a drainage pipe 13 for conveying steam, and the free end of the drainage pipe 13 is externally connected to a condensing device. Personnel put tetrahydrofuran into the distillation box 1 through the feed pipe 14 for distillation, and the distilled steam will enter the drainage pipe 13, and then move to the external condensing device through the drainage pipe 13 for cooling, and then become liquid again for collection, and the external condensing device is an existing structure, which only needs to condense the steam to become liquid.

[0027] The distillation box 1 is symmetrically fixed with bottom blocks 2 on the circumference, and the top surfaces of the two bottom blocks 2 are fixed with electric push rods 3. The output ends of the two electric push rods 3 are transversely fixed with horizontal plates 4, which are transversely arranged above the distillation box 1. The bottom surfaces of the horizontal plates 4 are symmetrically and longitudinally fixed with vertical plates 5. The free ends of the two vertical plates 5 penetrate the inner cavity of the distillation box 1. The two vertical plates 5 are located at one end of the inner cavity of the distillation box 1 and are fixed with round blocks 6. The circumference of the round blocks 6 is connected with cleaning plates 7 for cleaning the inner wall of the distillation box 1. The circumference of the cleaning plates 7 is in contact with the distillation box 1. The inner wall of the two electric push rods 3 are electrically connected, and through the external PLC control panel, the two electric push rods 3 are moved synchronously, so that the two electric push rods 3 can drive the horizontal plate 4 to perform longitudinal reciprocating motion, thereby driving the two vertical plates 5 to perform longitudinal reciprocating motion, and can drive the round block 6 to perform longitudinal reciprocating motion in the inner cavity of the distillation box 1, and then the round block 6 drives the cleaning plate 7 to move, so that the cleaning plate 7 can scrape off the steam remaining on the inner wall of the distillation box 1, so as to prevent the remaining steam from affecting the subsequent distillation work.

[0028] The center of the round block 6 is hollowed out, and a plurality of heat-conducting rods 8 are fixedly arranged at equal intervals on the top surface of the round block 6. The positions of the plurality of heat-conducting rods 8 are arranged in a circular array. The inner wall of each heat-conducting rod 8 is connected to a heating wire 9 for heating tetrahydrofuran. The inner bottom surface of the distillation box 1 is equipped with heat-conducting rods 8 and heating wires 9 having the same connection structure as the top surface of the round block 6. After tetrahydrofuran is put into the inner cavity of the distillation box 1, the heating wires 9 are energized through an external power supply so that the heating wires 9 can generate heat and transfer it to the heat-conducting rods 8, thereby heating the tetrahydrofuran. If less tetrahydrofuran is put in and its liquid level is low, only the heating wires 9 on the inner bottom surface of the distillation box 1 are energized to heat the tetrahydrofuran. If more tetrahydrofuran is put in and its liquid level is high, the power is turned on. The electric push rod 3 is moved to drive the heat-conducting rod 8 and the heating wire 9 at the top to move upward through the horizontal plate 4, the vertical plate 5 and the round block 6, and according to the actual situation, the round block 6 is moved to the upper half of the tetrahydrofuran. At this time, the heating wires 9 at the top and the bottom are energized, so that the heat-conducting rods 8 and the heating wires 9 at the top and the bottom can heat the tetrahydrofuran in sections, so that the whole tetrahydrofuran can be quickly heated and evaporated, avoiding the situation that when the liquid level is high, the heating structure at the inner bottom surface will first heat the tetrahydrofuran in the lower half, and then heat the tetrahydrofuran transferred to the upper half, thereby consuming more energy resources and time to heat the whole tetrahydrofuran, thereby improving the efficiency of tetrahydrofuran recovery.

[0029] A driving motor 10 is fixedly provided on the top surface of the distillation box 1, and an output end of the driving motor 10 passes through the distillation box 1 and is connected to a rotating shaft 11, and a plurality of stirring rods 12 for stirring tetrahydrofuran are equidistantly connected to the circumference of the rotating shaft 11, and the rotating shaft 11 and the plurality of stirring rods 12 are located in a hollow area at the center of the round block 6. When the tetrahydrofuran is heated, the driving motor 10 can be turned on to drive the rotating shaft 11 and the plurality of stirring rods 12 to rotate, so that the tetrahydrofuran can be stirred and the tetrahydrofuran can be in a stirring state, thereby improving the heating uniformity of the tetrahydrofuran.

[0030] An L-shaped bracket 15 is symmetrically fixed on the circumferential side of the feed pipe 14 and below the feed pipe 14. A rotating block 16 is provided between the two brackets 15 through a rotating rod, and the two ends of the rotating rod are rotatably connected to the two side surfaces of the two brackets 15 respectively, and the rotating block 16 is fixedly sleeved on the circumferential side of the rotating rod. A baffle 17 for limiting the feed pipe 14 is fixed on the top surface of the rotating block 16. After the personnel transport tetrahydrofuran through the feed pipe 14, the baffle 17 is moved to allow the baffle 17 to rotate counterclockwise with the rotating rod as the axis, so that one side of the baffle 17 is in contact with one side of the feed pipe 14, so that the feed pipe 14 can be restricted, thereby reducing the situation where the tetrahydrofuran vapor will be discharged from the feed pipe 14.

[0031] Rectangular blocks 18 are fixedly provided on one side of the baffle 17 away from the rotating block 16 and on one side of the feed pipe 14 away from the two brackets 15. Screw holes are provided on one side of the two rectangular blocks 18, and the positions of the two screw holes are aligned. Bolts 19 are threadedly connected to the inner cavities of the two aligned screw holes. After one side of the baffle 17 is against the feed pipe 14, the opposite sides of the two rectangular blocks 18 will fit together and the positions of the two screw holes will be aligned. At this time, the bolts 19 are inserted into the two aligned screw holes, and the positions of the two rectangular blocks 18 can be fixed by the self-locking of the thread, thereby fixing the position of the baffle 17, allowing the baffle 17 to fit tightly against the feed pipe 14 to restrict the feed pipe 14.

[0032] Working principle:

[0033] The tetrahydrofuran recovery device feeds the tetrahydrofuran to be distilled into the distillation box 1 through the feed pipe 14. If the tetrahydrofuran liquid level in the inner cavity of the distillation box 1 is high, the personnel turns on the electric push rod 3, and the electric push rod 3 drives the horizontal plate 4 to move upward, so that the horizontal plate 4 can drive the round block 6 to move upward through the two vertical plates 5, and the round block 6 can drive multiple heat-conducting rods 8 and multiple heating wires 9 to move upward, so that the round block 6 can drive the heat-conducting rods 8 and the heating wires 9 to be located in the upper half of the tetrahydrofuran. At this time, the external power supply is energized with the heating wire 9, so that the heating wire 9 can generate heat and transfer it to the heat-conducting rod 8, so that the tetrahydrofuran in the tetrahydrofuran can be heated. The heat conducting rod 8 and the heating wire 9 on the upper half of the tetrahydrofuran heat the upper half of the tetrahydrofuran, while the heat conducting rod 8 and the heating wire 9 on the inner bottom surface of the distillation box 1 can heat the lower half of the tetrahydrofuran, so that multiple heat conducting rods 8 and heating wires 9 can heat the tetrahydrofuran in sections, and then the tetrahydrofuran can be quickly evaporated by heat, avoiding the situation where, when the liquid level is high, the heating structure on the inner bottom surface will first heat the tetrahydrofuran in the lower half, and then heat the tetrahydrofuran transferred to the upper half, thereby consuming more energy resources and time to heat the tetrahydrofuran as a whole, thereby improving the efficiency of tetrahydrofuran recovery.

[0034] It should be noted that, in this article, relational terms such as one and two are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Moreover, the terms "include", "comprise" or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or device. In the absence of further restrictions. The sentence "includes an element defined by ... does not exclude the existence of other identical elements in the process, method, article or device including the element".

[0035] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A tetrahydrofuran recovery device, comprising a distillation tank (1), characterized in that: The distillation box (1) is symmetrically fixed with a bottom block (2) on the circumference of the distillation box (1), and the top surfaces of the two bottom blocks (2) are fixed with electric push rods (3). The output ends of the two electric push rods (3) are transversely fixed with a horizontal plate (4), and the horizontal plate (4) is transversely arranged above the distillation box (1). The bottom surface of the horizontal plate (4) is symmetrically and longitudinally fixed with a vertical plate (5), and the free ends of the two vertical plates (5) penetrate into the inner cavity of the distillation box (1). A round block (6) is fixed at one end of the two vertical plates (5) located in the inner cavity of the distillation box (1), and the center position of the round block (6) is hollowed out. The circumference of the round block (6) is connected to a cleaning plate (7) for cleaning the inner wall of the distillation box (1). A plurality of heat-conducting rods (8) are equidistantly fixed on the top surface of the round block (6), and the positions of the plurality of heat-conducting rods (8) are arranged in a circular array. The inner wall of each heat-conducting rod (8) is connected to an electric heating wire (9) for heating tetrahydrofuran.

2. A tetrahydrofuran recovery device according to claim 1, characterized in that: The inner bottom surface of the distillation box (1) is installed with a heat conducting rod (8) and a heating wire (9) having the same connection structure as the top surface of the round block (6), and the top surface of the distillation box (1) is fixedly provided with a driving motor (10).

3. A tetrahydrofuran recovery device according to claim 2, characterized in that: The output end of the driving motor (10) passes through the distillation box (1) and is connected to a rotating shaft (11), and a plurality of stirring rods (12) for stirring tetrahydrofuran are equidistantly connected to the circumference of the rotating shaft (11).

4. A tetrahydrofuran recovery device according to claim 1, characterized in that: A feed pipe (14) is connected to the peripheral side of the distillation box (1), and an L-shaped bracket (15) is symmetrically fixedly arranged on the peripheral side of the feed pipe (14) and below the feed pipe (14).

5. A tetrahydrofuran recovery device according to claim 4, characterized in that: A rotating block (16) is arranged between the two brackets (15) via a rotating rod, and a baffle (17) for limiting the feed pipe (14) is fixedly arranged on the top surface of the rotating block (16).

6. A tetrahydrofuran recovery device according to claim 5, characterized in that: A rectangular block (18) is fixedly provided on one side of the baffle (17) away from the rotating block (16) and one side of the feed pipe (14) away from the two brackets (15), and screw holes are provided on one side of the two rectangular blocks (18).

7. A tetrahydrofuran recovery device according to claim 6, characterized in that: The inner cavities of the two aligned screw holes are threadedly connected with bolts (19), and a drainage pipe (13) for conveying steam is connected to the top surface of the distillation box (1) and located on one side of the driving motor (10).

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