Equipment for preparing absolute ethyl alcohol by coupling heat pump double-tower rectification with pervaporation membrane

Abstract

The utility model discloses equipment for preparing absolute ethyl alcohol by coupling heat pump double-tower rectification with a pervaporation membrane, which comprises a preheater and a separation tank, and the preheater comprises a discharge port; a molecular sieve membrane piece is arranged in the middle of the interior of the separation tank, the upper end of the separation tank is communicated with a discharging port through a pipeline, a liquid discharging pipe is arranged at the lower end of the separation tank, and a discharging pipe is arranged on the portion, on the upper side of the molecular sieve membrane piece, of the separation tank. Liquid in the storage tank flows to the separation tank through the control valve, then separation is carried out through the molecular sieve module in the separation tank, waste is reduced, the stirring device is arranged, the liquid flowing into the separation tank is stirred up and down, and ethyl alcohol separation is facilitated.

Description

Technical Field

[0001] The utility model relates to the technical field of producing anhydrous ethanol, in particular to an anhydrous ethanol production device using a heat pump double-tower distillation coupled with a permeation vaporization membrane. Background Art

[0002] Ethanol is a highly effective solvent, widely used in medicine, coatings, hygiene products, cosmetics, oils, and other applications. Anhydrous ethanol refers to a high-purity aqueous solution of ethanol. The current production process for anhydrous ethanol is as follows: raw material preparation - fermentation - distillation - ethanol - dehydration - and finally anhydrous ethanol.

[0003] In the prior art, patent number CN214714451U, the patent name is a heat pump double-tower distillation coupled pervaporation membrane anhydrous ethanol production equipment, the heat pump is used to pressurize the secondary steam, and the compressed secondary steam is used as the heat source. At this time, the distillation reboiler can be closed, and the entire equipment no longer requires an external heat source, which can save a lot of steam costs. During the operation of the equipment, the inlet of the residual liquid pump is connected to the bottom discharge port of the distillation tower kettle through a pipeline, and its outlet is connected to the inlet on the shell of the preheater through a pipeline; the shell of the preheater is provided with a discharge port, the discharge port is used to discharge wastewater, the ethanol concentration in the wastewater is about 1%, which will cause about 1% concentration of ethanol in the wastewater discharged from the equipment to flow out, resulting in waste. Utility Model Content

[0004] The purpose of the present invention is to solve the problems mentioned in the above background technology.

[0005] In order to achieve the above purpose, the present invention adopts the following technical solutions:

[0006] A heat pump double-tower distillation coupled pervaporation membrane anhydrous ethanol production equipment, including a preheater and a separation tank,

[0007] The preheater includes a discharge port; a molecular sieve membrane is provided in the middle of the separation tank, the upper end of the separation tank is connected to the discharge port through a pipeline, a drain pipe is provided at the lower end of the separation tank, and a discharge pipe is provided on the separation tank on the upper side of the molecular sieve membrane. The molecular sieve membrane is used to separate the ethanol containing about 1% concentration to prevent waste.

[0008] Preferably, a stirring device is provided in the upper space of the molecular sieve membrane, and the stirring device includes a driving device connected to the outside of the separation tank, the output end of the driving device is connected to a rotating rod, and the lower end of the rotating rod is connected to a stirring component, and the liquid is caused to surge by the stirring device.

[0009] Preferably, the stirring component includes a driving bevel gear connected to the lower end of the rotating rod, the driving bevel gear is meshed with a driven bevel gear, a driven rod is fixed on the driven bevel gear, and a plurality of stirring rods are rotatably connected to the driven rod in the circumferential direction.

[0010] Preferably, the stirring device further comprises a sleeve casing which is sleeved on the driving bevel gear and the driven bevel gear, the driven rod passes through the sleeve casing, and the upper end of the sleeve casing is fixed to the separation tank.

[0011] Preferably, the driven rod is arranged perpendicular to the rotating rod.

[0012] Preferably, the stirring rod is perpendicular to the driven rod.

[0013] Preferably, the separation tank comprises a tank cover, a tank body and a tank bottom, and both ends of the tank body are connected to the tank cover and the tank bottom respectively by bolts.

[0014] Preferably, the pipeline includes a first pipe body and a second pipe body, and a storage tank is provided between the first pipe body and the second pipe body.

[0015] Preferably, both ends of the first tube body are connected to the discharge port and the top inlet of the storage tank respectively, and both ends of the second tube body are connected to the inlet of the separation tank and the outlet of the storage tank respectively.

[0016] Preferably, a control valve is provided on the second pipe body.

[0017] Compared with the prior art, the present invention has the following beneficial effects:

[0018] By setting up a storage tank and a separation tank, the storage tank is used to temporarily store about 1% concentration of ethanol discharged from the preheater. The liquid in the storage tank flows to the separation tank through a control valve, and then is separated by the molecular sieve module in the separation tank, which reduces waste.

[0019] The stirring device is provided to stir the liquid flowing into the separation tank up and down, which is beneficial to the separation of ethanol. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the following briefly introduces the drawings required for use in the embodiments. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

[0021] Figure 1 It is a schematic diagram of the overall structure of the utility model.

[0022] Figure 2 This is a schematic diagram of the positions of the stirring device and molecular sieve membrane components of the present invention.

[0023] Figure 3 This is a schematic structural diagram of the stirring component of the present invention.

[0024] Explanation of figure numbers: 1. Preheater; 11. Discharge outlet; 2. Separation tank; 21. Drain pipe; 22. Discharge pipe; 23. Tank cover; 24. Tank body; 25. Tank bottom; 3. Molecular sieve membrane; 4. Pipeline; 41. Tube body 1; 42. Tube body 2; 5. Storage tank; 6. Control valve; 7. Stirring device; 71. Driving device; 72. Rotating rod; 73. Stirring component; 731. Driving bevel gear; 732. Driven bevel gear; 733. Driven rod; 734. Stirring rod; 74. Housing. DETAILED DESCRIPTION

[0025] The present invention is described in further detail below with reference to the accompanying drawings.

[0026] The following description is intended to disclose the present invention so that those skilled in the art can implement the present invention. The preferred embodiments described below are for illustrative purposes only, and those skilled in the art will readily appreciate other obvious variations. The basic principles of the present invention as defined in the following description may be applied to other embodiments, variations, improvements, equivalents, and other technical solutions that do not depart from the spirit and scope of the present invention.

[0027] Those skilled in the art should understand that, in the disclosure of the present invention, the terms "longitudinal", "transverse", "up", "down", "left", "right", "front", "back", "vertical", "horizontal", "top", "bottom", "inside", "outside" and the like to indicate directions or positions are based on the directions or positional relationships shown in the accompanying drawings, which are merely simplified descriptions for the convenience of describing the present invention, and do not indicate or imply that the device or component referred to must have a specific direction, be constructed and operated in a specific direction. Therefore, the above terms should not be understood as limitations on the present invention.

[0028] It is to be understood that the term "one" should be understood as "at least one" or "one or more", that is, in one embodiment, the number of an element may be one, while in another embodiment, the number of the elements may be multiple, and the term "one" should not be understood as a limitation on the quantity.

[0029] See also Figure 1-Figure 3 , a heat pump double tower distillation coupled permeation vaporization membrane anhydrous ethanol production equipment, including

[0030] Preheater 1 and separation tank 2, preheater 1 includes a discharge port 11; preheater 1 is the preheater 1 in the background technology patent, a molecular sieve membrane 3 is provided in the middle of the separation tank 2, the molecular sieve membrane 3 is the prior art, the upper end of the separation tank 2 is connected to the discharge port 11 through a pipe 4, the lower end of the separation tank 2 is provided with a drain pipe 21, and the separation tank 2 on the upper side of the molecular sieve membrane 3 is provided with a discharge pipe 22, the pipe 4 includes a pipe body 1 41 and a pipe body 2 42, a storage tank 5 is provided between the pipe body 1 41 and the pipe body 2 42, the two ends of the pipe body 1 41 are respectively connected to the discharge port 11 and the top inlet of the storage tank 5, the two ends of the pipe body 2 42 are respectively connected to the inlet of the separation tank 2 and the outlet of the storage tank 5, a control valve 6 is provided on the pipe body 2 42, the control valve 6 is the prior art, and the figure is a schematic diagram. The discharge port 11 discharges 1% ethanol into the storage tank 5 for temporary storage, and the control valve 6 controls whether the liquid in the storage tank 5 flows into the separation tank 2.

[0031] The upper space of the molecular sieve membrane 3 is provided with a stirring device 7. The separation tank 2 includes a tank cover 23, a tank body 24 and a tank bottom 25. The two ends of the tank body 24 are connected to the tank cover 23 and the tank bottom 25 respectively by bolts. The separation tank 2 is divided into three parts for easy cleaning and also for easy installation of the stirring device 7. The stirring device 7 includes a driving device 71 connected to the outside of the separation tank 2. The driving device 71 is a motor. The output end of the driving device 71 is connected to a rotating rod 72. The lower end of the rotating rod 72 is connected to a stirring member 73. The stirring member 73 includes a driving bevel gear 731 connected to the lower end of the rotating rod 72. The driving bevel gear 731 is engaged with a driven bevel gear 73 2. A driven rod 733 is fixed on the driven bevel gear 732. The driven rod 733 is arranged perpendicular to the rotating rod 72. A plurality of stirring rods 734 are rotatably connected to the driven rod 733 in the circumferential direction. The stirring rods 734 are perpendicular to the driven rod 733, so that the liquid entering the separation tank 2 can surge up and down, thereby facilitating the separation of liquid containing about 1% concentration of ethanol. There can be multiple driven bevel gears 732. This application takes two as an example. The stirring device 7 also includes a sleeve 74 which is sleeved on the driving bevel gear 731 and the driven bevel gear 732. The driven rod 733 passes through the sleeve 74. The upper end of the sleeve 74 is fixed to the separation tank 2, and the sleeve 74 supports the driven rod 733.

[0032] During use, ethanol containing about 1% concentration flows into the separation tank 2 through the control valve 6, and then passes through the molecular sieve membrane 3 to separate the ethanol therein. During the separation process, the driving device 71 is started, the driving device 71 rotates the rotating rod 72, the rotating rod 72 rotates the driving bevel gear 731, the driving bevel gear 731 rotates the driven bevel gear 732, the driven bevel gear 732 rotates the driven rod 733, and the driven rod 733 rotates the stirring rod 734. The stirring plate causes the liquid in the separation tank 2 to surge up and down, thereby facilitating separation. After separation is completed, the liquid flows out and flows into a new liquid containing about 1% concentration of ethanol through the control valve 6.

[0033] Those skilled in the art will appreciate that the embodiments of the present invention described above and shown in the accompanying drawings are intended only as examples and do not limit the present invention. The objectives of the present invention have been fully and effectively achieved. The functions and structural principles of the present invention have been demonstrated and illustrated in the embodiments. Any variations or modifications may be made to the embodiments of the present invention without departing from the principles described.

Claims

1. A heat pump double-tower distillation coupled pervaporation membrane anhydrous ethanol production equipment, characterized in that: include: A preheater (1) includes a discharge port (11); a separation tank (2) having a molecular sieve membrane (3) disposed in the middle thereof, the upper end of the separation tank (2) being connected to the discharge port via a pipe (4), a liquid discharge pipe (21) being disposed at the lower end of the separation tank (2), a discharge pipe (22) being disposed on the separation tank (2) above the molecular sieve membrane (3), a stirring device (7) being disposed in the upper space of the molecular sieve membrane (3), the stirring device (7) including a driving device (71) connected to the outside of the separation tank (2), a rotating rod (72) being connected to the output end of the driving device (71), and a stirring component (73) being connected to the lower end of the rotating rod (72).

2. The heat pump double-tower distillation coupled pervaporation membrane anhydrous ethanol production equipment according to claim 1, characterized in that: The stirring component (73) comprises a driving bevel gear (731) connected to the lower end of the rotating rod (72); a driven bevel gear (732) is meshed with the driving bevel gear (731); a driven rod (733) is fixed to the driven bevel gear (732); and a plurality of stirring rods (734) are rotatably connected to the driven rod (733) in a circumferential direction.

3. The heat pump double-tower distillation coupled pervaporation membrane anhydrous ethanol production equipment according to claim 2, characterized in that: The stirring device (7) further comprises a sleeve (74) sleeved on the driving bevel gear (731) and the driven bevel gear (732); the driven rod (733) passes through the sleeve (74); and the upper end of the sleeve (74) is fixed to the separation tank (2).

4. The heat pump double-tower distillation coupled pervaporation membrane anhydrous ethanol production equipment according to claim 3, characterized in that: The driven rod (733) is arranged perpendicular to the rotating rod (72).

5. The heat pump double-tower distillation coupled pervaporation membrane anhydrous ethanol production equipment according to claim 4, characterized in that: The stirring rod (734) is perpendicular to the driven rod (733).

6. The heat pump double-tower distillation coupled pervaporation membrane anhydrous ethanol production equipment according to claim 1, characterized in that: The separation tank (2) comprises a tank cover (23), a tank body (24) and a tank bottom (25), and both ends of the tank body (24) are connected to the tank cover (23) and the tank bottom (25) respectively by bolts.

7. The heat pump double-tower distillation coupled pervaporation membrane anhydrous ethanol production equipment according to claim 1, characterized in that: The pipeline (4) comprises a first pipe body (41) and a second pipe body (42), and a storage tank (5) is provided between the first pipe body (41) and the second pipe body (42).

8. The heat pump double-tower distillation coupled pervaporation membrane anhydrous ethanol production equipment according to claim 7, characterized in that: The two ends of the tube body 1 (41) are respectively connected to the discharge port (11) and the top inlet of the storage tank (5), and the two ends of the tube body 2 (42) are respectively connected to the inlet of the separation tank (2) and the outlet of the storage tank (5).

9. The heat pump double-tower distillation coupled pervaporation membrane anhydrous ethanol production equipment according to claim 8, characterized in that: The second pipe body (42) is provided with a control valve (6).

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