Methanol recovery device of MTBE (Methyl Tert-Butyl Ether) production equipment

Abstract

The invention relates to the technical field of methanol recovery, in particular to a methanol recovery device of MTBE (methyl tert-butyl ether) production equipment, which comprises a distillation outer barrel, a distillation inner barrel fixedly mounted in the distillation outer barrel, a barrel cover fixedly mounted at the top of the distillation outer barrel, a liquid inlet pipe fixedly connected to the top of the barrel cover, and a stirring assembly rotatably mounted in the distillation inner barrel. A heating assembly is fixedly installed in the stirring assembly, a rotating assembly is arranged on the periphery of the stirring assembly, an interlayer is arranged between the distillation outer barrel and the distillation inner barrel, a spiral plate is fixedly installed in the interlayer, a collecting assembly is fixedly connected to the bottom of the distillation outer barrel, and a cooling assembly is arranged at the end, away from the distillation outer barrel, of the collecting assembly. The bottoms of the cooling assembly and the distillation outer barrel are connected with the same material collecting box for collecting liquid methanol. The stirring assembly and the heating assembly are integrated in the distillation inner barrel, so that synchronous operation of stirring and heating is realized, and the problem of local overheating or scaling caused by a fixed heating area is avoided.

Description

Technical Field

[0001] The invention relates to the technical field of methanol recovery, and in particular to a methanol recovery device for MTBE production equipment. Background Art

[0002] In the production process of methyl tert-butyl ether (MTBE), the recovery efficiency of methanol directly affects the production cost and environmental protection indicators. Traditional methanol recovery devices mostly use a single-layer distillation structure, which has problems such as uneven heating, difficult residue cleaning, and low steam collection efficiency.

[0003] In the prior art, a patent document with a publication number of CN219462544U is proposed to solve the above technical problems. The technical solution disclosed in the patent document is as follows: The utility model discloses a methanol recovery device of an MTBE production equipment, including a base and a mixing box, the mixing box is welded on the upper surface of the base, a rotating groove is arranged on the inner surface of the mixing box, a rotating block is embedded on the inner surface of the rotating groove, a rotating plate is welded on the lower surface of the rotating block, a transmission gear is welded on the lower surface of the rotating plate, and a mounting rod is welded on the lower surface of the transmission gear. The methanol recovery device of an MTBE production equipment described in the utility model drives the power bevel gear to rotate by controlling the rotating motor, drives the rotating shaft to rotate by utilizing the meshing between the power bevel gear and the transmission bevel gear, thereby driving the power gear to rotate, and then drives the mounting rod to rotate in a directional manner by utilizing the meshing between the power gear and the transmission gear, thereby driving the stirring rod to rotate, thereby driving the raw material mixed liquid to stir, thereby reducing the time required for heating the raw material, accelerating the evaporation rate of the raw material mixed liquid, thereby improving the methanol recovery efficiency.

[0004] It can be seen from the technical solution proposed in the above-mentioned invention patent document that the above-mentioned solution still has obvious shortcomings. The heating device in the above-mentioned technical solution is fixedly arranged on the outside of the mixing box, and heats the raw material mixture inside the mixing box by heat conduction to vaporize the raw material mixture. In the method of heating and vaporizing the solution in the container through the container, only the solution close to the inner wall of the mixing box is heated, and the temperature of the solution far away from the inner wall of the mixing box rises slowly, which will cause uneven temperature inside the container and further reduce the vaporization efficiency of the solution. Therefore, the prior art urgently needs a technical solution to solve the above-mentioned problems. Summary of the invention

[0005] The object of the present invention is to provide a methanol recovery device for MTBE production equipment to solve the problems raised in the above background technology.

[0006] In order to solve the above technical problems, the technical solution adopted by the present invention is: A methanol recovery device for MTBE production equipment comprises a distillation outer barrel, a distillation inner barrel is fixedly installed in the distillation outer barrel, a barrel cover is fixedly installed on the top of the distillation outer barrel, a liquid inlet pipe is fixedly connected to the top of the barrel cover, a stirring component is rotatably installed in the distillation inner barrel, a heating component is fixedly installed in the stirring component, a rotating component for cleaning the heating component is provided on the periphery of the stirring component, an interlayer is provided between the distillation outer barrel and the distillation inner barrel, a spiral plate for guiding steam is fixedly installed in the interlayer, a collecting component for collecting steam is fixedly connected to the bottom of the distillation outer barrel, a cooling component is provided at one end of the collecting component away from the distillation outer barrel, and the cooling component and the bottom of the distillation outer barrel are both connected to the same collecting box for collecting liquid methanol.

[0007] A further improvement of the technical solution of the present invention is that the stirring assembly includes a hollow rotating shaft rotatably installed in the distillation inner barrel, the top of the hollow rotating shaft passes through the barrel cover and is fixedly connected with a main bevel gear, the top of the barrel cover is fixedly connected with a motor, the output end of the motor is fixedly connected with a secondary bevel gear, the secondary bevel gear is meshed with the main bevel gear, and the side walls of the hollow rotating shaft are rotatably connected with multiple hollow cross bars in sequence from top to bottom.

[0008] A further improvement of the technical solution of the present invention is that: the heating component includes a mounting column fixedly installed in the distillation inner barrel, and the mounting column is coaxially arranged with the hollow rotating shaft, the outer rotation of the mounting column is connected with a plurality of conductive slip rings, heating rods are installed in all the hollow cross bars, and all the heating rods are fixedly connected to the side walls of the conductive slip rings, a plurality of circuits for controlling the power-on state of the conductive slip rings are arranged in the mounting column, a plurality of heat dissipation holes are opened in the side walls of the hollow cross bar, and a hierarchical control device for controlling a plurality of circuits is fixedly connected to the top of the mounting column.

[0009] A further improvement of the technical solution of the present invention is that the rotating assembly includes an extension rod fixedly installed at the end of a hollow cross bar, and the extension rod is fixedly connected to a gear at one end away from the hollow cross bar, and a plurality of gear rings for receiving the gears are fixedly installed in the distillation inner barrel, and the gears are meshed with the gear rings.

[0010] A further improvement of the technical solution of the present invention is that the collecting component includes an air inlet opened on the top inner wall of the distillation inner barrel, an air outlet opened on the bottom inner wall of the distillation inner barrel, and the top and bottom of the spiral plate are respectively aligned with the bottom of the air inlet and the air outlet, a ventilation duct is fixedly connected to the inner wall of the air outlet, a fan is fixedly connected to the end of the ventilation duct, a double-way pipe is fixedly connected to the end of the fan away from the ventilation duct, one end of the double-way pipe is fixedly connected to a cold air blower, and the other end of the double-way pipe is fixedly connected to the collecting box.

[0011] A further improvement of the technical solution of the present invention is that a water outlet is provided at the bottom of the interlayer, and the water outlet is aligned with the bottom end of the spiral plate, and the water outlet is connected to the collection box through a pipeline.

[0012] A further improvement of the technical solution of the present invention is that: a groove for collecting the methanol solution is provided on the spiral plate.

[0013] A further improvement of the technical solution of the present invention is that a centrifugal fan blade group is fixedly connected to the outer side of the top of the hollow shaft.

[0014] Due to the adoption of the above technical solution, the present invention has the following technical advances compared with the prior art: 1. The present invention integrates the heating component into the rotating hollow cross bar and combines it with the conductive slip ring dynamic power supply technology to achieve synchronous operation of stirring and heating, so that the heat source is dynamically distributed to various areas of the solution with stirring, reducing the coking problem caused by local overheating and improving the heating efficiency.

[0015] 2. The present invention utilizes the meshing of gears and gear rings to drive the extension rod to rotate, and continuously scrapes the surface of the heating rod and the inside of the heat dissipation hole during the stirring process, automatically removing scaling attachments and avoiding the attenuation of heat transfer efficiency caused by scaling.

[0016] 3. The present invention opens an inverted triangular groove channel on the spiral plate in the interlayer, cooperates with the centrifugal fan blade group to force the steam to flow, thereby increasing the steam residence time, and cooperates with the cold air fan and the low temperature environment of the collecting box to form a gradient condensation system, thereby realizing two-stage condensation of steam and improving the condensation efficiency of the device.

[0017] 4. The present invention monitors the liquid level in real time through a hierarchical control device, dynamically shuts down the upper heating rod and gradually reduces the heating power, thereby reducing energy consumption and the risk of dry burning, and significantly improving the safety of equipment operation. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] In order to more clearly illustrate the implementation methods of the present invention or the technical solutions in the prior art, the following briefly introduces the drawings required for the implementation methods or the description of the prior art. Obviously, the drawings in the following description are only exemplary, and for ordinary technicians in this field, other implementation drawings can be derived from the provided drawings without creative work.

[0019] Figure 1 It is a schematic diagram of the three-dimensional structure of the present invention; Figure 2 for Figure 1 A front cross-sectional view of Figure 3 for Figure 2 A magnified schematic diagram Figure 4 It is a schematic diagram of the installation of the inner distillation barrel and the outer distillation barrel in the present invention; Figure 5 It is a schematic diagram of the three-dimensional structure of the spiral plate in the present invention; Figure 6 It is a schematic diagram of the three-dimensional structure of the hollow cross bar in the present invention; Figure 7 It is a schematic diagram of the structure of the centrifugal fan blade group in the present invention.

[0020] In the figure: 1. distillation outer barrel; 2. distillation inner barrel; 3. barrel cover; 4. liquid inlet pipe; 5. stirring assembly; 6. heating assembly; 7. rotating assembly; 8. interlayer; 9. spiral plate; 10. collecting assembly; 11. cooling assembly; 12. collecting box; 13. hollow shaft; 14. main bevel gear; 15. motor; 16. secondary bevel gear; 17. hollow cross bar; 18. mounting column; 19. conductive slip ring; 20. heating rod; 21. heat dissipation hole; 22. graded control device; 23. extension rod; 24. gear; 25. gear ring; 26. air inlet; 27. air outlet; 28. ventilation duct; 29. ​​fan; 30. double-pass pipe; 31. air cooler; 32. water outlet; 33. centrifugal fan blade group; 34. groove. DETAILED DESCRIPTION

[0021] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0022] The following first describes the concepts involved in the present application in conjunction with the accompanying drawings. It should be noted that the following description of each concept is only to make the content of the present application easier to understand, and does not limit the scope of protection of the present application; at the same time, the embodiments and features in the embodiments of the present application can be combined with each other in the absence of conflict. The present application will be described in detail with reference to the accompanying drawings and in conjunction with the embodiments.

[0023] Example like Figures 1 to 7As shown, the present invention provides a methanol recovery device for MTBE production equipment, comprising a distillation outer barrel 1, a distillation inner barrel 2 is fixedly installed in the distillation outer barrel 1, a barrel cover 3 is fixedly installed on the top of the distillation outer barrel 1, a liquid inlet pipe 4 is fixedly connected to the top of the barrel cover 3, a stirring component 5 is rotatably installed in the distillation inner barrel 2, a heating component 6 is fixedly installed in the stirring component 5, a rotating component 7 for cleaning the heating component 6 is provided on the outer periphery of the stirring component 5, an interlayer 8 is provided between the distillation outer barrel 1 and the distillation inner barrel 2, a spiral plate 9 for guiding steam is fixedly installed in the interlayer 8, a collecting component 10 for collecting steam is fixedly connected to the bottom of the distillation outer barrel 1, a cooling component 11 is provided at one end of the collecting component 10 away from the distillation outer barrel 1, and the cooling component 11 and the bottom of the distillation outer barrel 1 are both connected to the same collecting box 12 for collecting liquid methanol.

[0024] As a further explanation of this embodiment, the heating device in the general existing technical solution is fixedly arranged on the outside of the container, and the raw material mixture inside the container is heated by heat conduction to vaporize the raw material mixture. However, in this method of heating and vaporizing the solution in the container through the container, only the solution in contact with the inner wall of the container is heated up, and the temperature of the solution far away from the inner wall of the container rises more slowly, which will cause uneven temperature inside the container and reduce the vaporization efficiency of the solution.

[0025] In this embodiment, the prepared solution is injected into the distillation inner barrel 2 from the liquid inlet pipe 4, and a sealed distillation cavity is formed by the double-layer structure design of the distillation outer barrel 1 and the distillation inner barrel 2. The stirring component 5 and the heating component 6 are integrated in the distillation inner barrel 2 to realize the synchronous operation of stirring and heating, and avoid the problem of local overheating caused by the fixed heating area. The spiral plate 9 arranged in the interlayer 8 forms a spiral guide channel, which extends the steam flow path, so that the steam is gradually condensed and liquefied during the flow in the interlayer 8, thereby improving the overall recovery efficiency of the device. Most of the steam flowing in the interlayer 8, under the coordinated work of the collection component 10 and the cooling component 11, is guided to gradually condense and collect in the collection box 12, thereby realizing efficient recovery of liquid methanol. The present invention significantly reduces the influence of scaling on heat transfer efficiency through dynamic stirring heating and steam path optimization, and effectively improves the recovery efficiency of methanol.

[0026] As a further description of an embodiment of a methanol recovery device of an MTBE production equipment, the stirring assembly 5 includes a hollow rotating shaft 13 rotatably installed in the distillation inner barrel 2, the top of the hollow rotating shaft 13 passes through the barrel cover 3 and is fixedly connected to a main bevel gear 14, the top of the barrel cover 3 is fixedly connected to a motor 15, the output end of the motor 15 is fixedly connected to a secondary bevel gear 16, the secondary bevel gear 16 is meshed with the main bevel gear 14, and the side walls of the hollow rotating shaft 13 are rotatably connected to a plurality of hollow cross bars 17 in sequence from top to bottom.

[0027] As a further explanation of this embodiment, in this embodiment, the stirring assembly 5 realizes power transmission through the hollow rotating shaft 13 and the bevel gear transmission structure. The top of the hollow rotating shaft 13 is connected to the main bevel gear 14, and the motor 15 drives the secondary bevel gear 16 to engage and drive, driving the rotating shaft and the hollow cross bar 17 to rotate. The hollow cross bar 17 is arranged in a layered manner from top to bottom along the axial direction of the hollow rotating shaft 13, which enhances the fluidity of the solution during stirring, accelerates the uniform diffusion of heat, avoids liquid surface stratification, and combines the stability of the bevel gear transmission to ensure that the stirring process is controllable and adapts to the processing requirements of materials with different viscosities.

[0028] As a further description of an embodiment of a methanol recovery device of an MTBE production equipment, the heating component 6 includes a mounting column 18 fixedly mounted in the distillation inner barrel 2, and the mounting column 18 is coaxially arranged with the hollow rotating shaft 13, and a plurality of conductive slip rings 19 are rotatably connected to the outside of the mounting column 18, heating rods 20 are installed in all hollow cross bars 17, and all heating rods 20 are fixedly connected to the side walls of the conductive slip rings 19, a plurality of circuits for controlling the power-on state of the conductive slip rings 19 are arranged in the mounting column 18, a plurality of heat dissipation holes 21 are opened in the side walls of the hollow cross bars 17, and a hierarchical control device 22 for controlling a plurality of circuits is fixedly connected to the top of the mounting column 18.

[0029] As a further explanation of this embodiment, in this embodiment, the heating component 6 adopts a combination design of a conductive slip ring 19 and a graded control device 22 (the graded control device 22 in this embodiment is an existing multi-circuit control assembly, and the graded control device 22 can be used to individually control the switch and current size of each circuit). The conductive slip ring 19 dynamically transmits electricity to the rotating heating rod 20, and the heating rod 20 is embedded in the hollow cross bar 17 and directly contacts the solution through the heat dissipation hole 21 to improve the heat conduction efficiency. The graded control device 22 automatically adjusts the heating temperature according to the liquid level, and the upper heating temperature is gradually turned off as the liquid level drops to prevent dry burning and reduce energy consumption. The segmented heating design further optimizes the heat distribution and reduces the risk of coking caused by local overheating.

[0030] As a further description of an embodiment of the methanol recovery device of an MTBE production equipment, the rotating component 7 includes an extension rod 23 fixedly mounted on the end of the hollow cross bar 17, and the extension rod 23 is fixedly connected to the end away from the hollow cross bar 17 with a gear 24, and a plurality of gear rings 25 for receiving the gears 24 are fixedly mounted in the distillation inner barrel 2, and the gears 24 are meshed with the gear rings 25.

[0031] As a further explanation of this embodiment, in this embodiment, the rotating assembly 7 realizes a self-cleaning function through the meshing of the gear 24 and the ring gear 25. When the extension rod 23 rotates with the hollow cross bar 17, the gear 24 moves along the fixed ring gear 25, driving the extension rod 23 to drive the hollow cross bar 17 to rotate and scrape the surface of the heating rod 20, and remove the scale attached to the heating rod 20 when it is heated by friction. The stirring kinetic energy is used to automatically maintain the cleaning of the heating assembly 6, reduce the frequency of cleaning requirements, and ensure the long-term stability of the heat transfer efficiency.

[0032] As a further description of an embodiment of a methanol recovery device of an MTBE production equipment, the collecting component 10 includes an air inlet 26 opened on the top inner wall of the distillation inner barrel 2, an air outlet 27 opened on the bottom inner wall of the distillation inner barrel 2, and the top and bottom of the spiral plate 9 are respectively aligned with the bottom of the air inlet 26 and the air outlet 27, a ventilation duct 28 is fixedly connected to the inner wall of the air outlet 27, a fan 29 is fixedly connected to the end of the ventilation duct 28, a double-way pipe 30 is fixedly connected to the end of the fan 29 away from the ventilation duct 28, one end of the double-way pipe 30 is fixedly connected to a cooling fan 31, and the other end of the double-way pipe 30 is fixedly connected to the collecting box 12.

[0033] As a further explanation of this embodiment, in this embodiment, the collection component 10 guides the steam into the spiral channel formed between the interlayer 8 and the spiral plate 9 through the negative pressure suction force generated by the rotation of the fan 29, so that the steam flow gradually condenses to form condensate during the flow in the interlayer 8, and slides down along the preset direction of the spiral plate 9 into the collection box 12 for easy collection. The fan 29 accelerates the flow of steam and cooperates with the cooling fan 31 to refrigerate, so that the steam is quickly condensed into liquid. The cold air flow blown downward by the cold air fan 31 converges in the collection box 12, so that the collection box 12 has a low temperature environment, further enhancing the condensation effect.

[0034] As a further description of an embodiment of a methanol recovery device of an MTBE production equipment, a water outlet 32 ​​is opened at the bottom of the interlayer 8, and the water outlet 32 ​​is aligned with the bottom end of the spiral plate 9, and the water outlet 32 ​​is connected to the collecting box 12 through a pipeline.

[0035] As a further explanation of an embodiment of a methanol recovery device of an MTBE production facility, a groove 34 for collecting methanol solution is provided on the spiral plate 9.

[0036] As a further explanation of this embodiment, in this embodiment, the water outlet 32 ​​is aligned with the end of the spiral plate 9, and the condensate enters the collection box 12 through the pipeline after being guided by the groove 34. The low temperature environment of the collection box 12 causes the water outlet 32 ​​to overflow the cold air in the opposite direction, accelerating the secondary condensation of the steam at the end of the spiral plate 9. The surface of the spiral plate 9 is provided with an inverted triangular groove 34, which can guide the condensate droplets to converge along the groove 34 to the water outlet 32. The groove 34 reduces liquid retention by guiding the flow, avoids the obstruction of steam flow, and accelerates the local condensation of steam, further improving the recovery efficiency.

[0037] As a further description of an embodiment of a methanol recovery device of an MTBE production facility, a centrifugal fan blade group 33 is fixedly connected to the outer side of the top of the hollow shaft 13 .

[0038] As a further explanation of this embodiment, in this embodiment, the centrifugal fan blade group 33 (the centrifugal fan blade group 33 in this embodiment is a vortex centrifugal fan blade in an existing centrifugal pump) generates centrifugal force by rotating the hollow shaft 13, accelerating the steam on the top of the distillation inner barrel 2 to the air inlet 26 opened on the distillation inner barrel 2, shortening the time for the steam to enter the interlayer 8, avoiding the accumulation of steam in the barrel causing pressure fluctuations, optimizing the steam flow path, and improving the overall processing efficiency of the device.

[0039] As a further illustration of this embodiment, the present device is subjected to relevant simulation experiments with existing distillation equipment, and the specific experimental process is as follows: This experiment aims to compare the performance differences between traditional single-layer distillation equipment and new methanol recovery equipment (integrated dynamic heating, self-cleaning and two-stage condensation system). The experiment uses MTBE production waste liquid (methanol concentration 18%~22%) as raw material, with a single batch processing capacity of 2 tons. The experiment is repeated three times under normal pressure and 85°C heating conditions, and the average analysis results are taken. The control group is a traditional external electric heating + straight tube condensation device, and the experimental group is a dynamic heating rod + spiral plate two-stage condensation system of the present invention. Experimental data show that the present invention shortens the time for heating the solution to the boiling point of methanol (64.7°C) from 42 minutes of the traditional device to 28 minutes, and the efficiency is improved by 33.3%. Through the monitoring of thermocouples at 6 points in the distillation inner barrel, the standard deviation of the solution temperature uniformity is reduced from ±9.2°C to ±1.8°C. The dynamic heating rod is directly immersed in the solution and rotates with the stirring assembly, and the heat transfer efficiency is increased from 68% of the traditional external conduction to 92%. The energy consumption per unit mass was reduced by 24.4% (0.135→0.102 kW·h / kg). In addition, the experimental data was verified three times, and the fluctuation range was <±2% (such as the recovery rate error ±0.3%). The third-party SGS blind sample test confirmed that the purity of the condensate methanol was 99.68%, which was consistent with the self-test results. The 500-hour continuous operation test showed that the heat transfer coefficient only decayed by 6.2%, proving the long-term effectiveness of the anti-fouling design.

[0040] The embodiments and / or implementation methods described above are only used to illustrate the preferred embodiments and / or implementation methods for realizing the technology of the present invention, and are not intended to limit the implementation methods of the technology of the present invention in any form. Any technical personnel in this field may make slight changes or modifications to other equivalent embodiments without departing from the scope of the technical means disclosed in the content of the present invention, but they should still be regarded as technologies or embodiments that are essentially the same as the present invention.

[0041] This article uses specific examples to illustrate the principles and implementation methods of this application. The description of the above embodiments is only used to help understand the method and its core ideas of this application. The above is only the preferred implementation method of this application. It should be pointed out that due to the limitations of textual expression and the objective existence of infinite specific structures, ordinary technicians in this technical field can make several improvements, modifications or changes without departing from the principles of this application, and can also combine the above technical features in an appropriate manner; these improvements, modifications, changes or combinations, or the direct application of the concept and technical solution of the invention to other occasions without improvement, should be regarded as the scope of protection of this application.

Claims

1. A methanol recovery device for MTBE production equipment, comprising a distillation outer barrel (1), characterized in that: A distillation inner barrel (2) is fixedly installed in the distillation outer barrel (1), a barrel cover (3) is fixedly installed on the top of the distillation outer barrel (1), and a liquid inlet pipe (4) is fixedly connected to the top of the barrel cover (3). A stirring component (5) is rotatably installed in the distillation inner barrel (2), a heating component (6) is fixedly installed in the stirring component (5), and a rotating component (7) for cleaning the heating component (6) is provided on the outer periphery of the stirring component (5). An interlayer (8) is provided between the distillation outer barrel (1) and the distillation inner barrel (2), and a spiral plate (9) for guiding steam is fixedly installed in the interlayer (8). A collecting component (10) for collecting steam is fixedly connected to the bottom of the distillation outer barrel (1), and a cooling component (11) is provided at one end of the collecting component (10) away from the distillation outer barrel (1). The cooling component (11) and the bottom of the distillation outer barrel (1) are both connected to the same collecting box (12) for collecting liquid methanol.

2. The methanol recovery device of the MTBE production equipment according to claim 1, characterized in that: The stirring assembly (5) comprises a hollow rotating shaft (13) rotatably mounted in the distillation inner barrel (2); the top of the hollow rotating shaft (13) passes through the barrel cover (3) and is fixedly connected to a main bevel gear (14); the top of the barrel cover (3) is fixedly connected to a motor (15); the output end of the motor (15) is fixedly connected to a secondary bevel gear (16); the secondary bevel gear (16) is meshed with the main bevel gear (14); and the side wall of the hollow rotating shaft (13) is rotatably connected to a plurality of hollow cross bars (17) in sequence from top to bottom.

3. The methanol recovery device of the MTBE production equipment according to claim 2, characterized in that: The heating assembly (6) comprises a mounting column (18) fixedly mounted in the distillation inner barrel (2), and the mounting column (18) is coaxially arranged with the hollow rotating shaft (13), the outer portion of the mounting column (18) is rotatably connected to a plurality of conductive slip rings (19), heating rods (20) are mounted in all the hollow cross bars (17), and all the heating rods (20) are fixedly connected to the side walls of the conductive slip rings (19), a plurality of circuits for controlling the power-on state of the conductive slip rings (19) are arranged in the mounting column (18), a plurality of heat dissipation holes (21) are opened in the side walls of the hollow cross bars (17), and a hierarchical control device (22) for controlling the plurality of circuits is fixedly connected to the top of the mounting column (18).

4. The methanol recovery device of the MTBE production equipment according to claim 2, characterized in that: The rotating assembly (7) comprises an extension rod (23) fixedly mounted on the end of a hollow cross bar (17), and a gear (24) is fixedly connected to one end of the extension rod (23) away from the hollow cross bar (17), and a plurality of gear rings (25) for receiving the gears (24) are fixedly mounted in the distillation inner barrel (2), and the gears (24) are meshed with the gear rings (25).

5. The methanol recovery device of the MTBE production equipment according to claim 1, characterized in that: The collecting assembly (10) comprises an air inlet (26) opened on the top inner wall of the distillation inner barrel (2), an air outlet (27) opened on the bottom inner wall of the distillation inner barrel (2), and the top and bottom of the spiral plate (9) are respectively aligned with the bottom of the air inlet (26) and the bottom of the air outlet (27), a ventilation duct (28) is fixedly connected to the inner wall of the air outlet (27), a fan (29) is fixedly connected to the end of the ventilation duct (28), a double-way pipe (30) is fixedly connected to the end of the fan (29) away from the ventilation duct (28), one end of the double-way pipe (30) is fixedly connected to a cooling fan (31), and the other end of the double-way pipe (30) is fixedly connected to the collecting box (12).

6. The methanol recovery device of the MTBE production equipment according to claim 5, characterized in that: A water outlet (32) is provided at the bottom of the interlayer (8), and the water outlet (32) is aligned with the bottom end of the spiral plate (9), and the water outlet (32) is connected to the collection box (12) through a pipeline.

7. The methanol recovery device of the MTBE production equipment according to claim 1, characterized in that: The spiral plate (9) is provided with a groove (34) for collecting the methanol solution.

8. The methanol recovery device of the MTBE production equipment according to claim 2, characterized in that: A centrifugal fan blade group (33) is fixedly connected to the outer side of the top of the hollow rotating shaft (13).

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