Rotary vacuum evaporator suitable for dealcoholization of liquid wine and dealcoholization method

Abstract

The rotary vacuum evaporator comprises an outer cylinder, an inner cylinder and a rotating shaft, the rotating shaft is horizontally arranged, the inner cylinder can rotate, the outer cylinder can be heated, the inner cylinder is located in the outer cylinder, the inner cylinder comprises a plurality of conical cylinders which are arranged in a sleeved mode from inside to outside, the large-diameter ends of every two adjacent sleeves arranged in a sleeved mode face opposite directions, and the large-diameter ends of every two adjacent sleeves face opposite directions. The outer barrel comprises a liquid inlet pipe, an air outlet pipe and a liquid outlet, the liquid inlet pipe extends into the small-diameter end in the innermost conical barrel, and liquid flows into the innermost conical barrel; liquid can flow from the small-diameter end of the conical barrel to the large-diameter end of the conical barrel, then flows from the innermost conical barrel to the outermost conical barrel, finally flows into the outer barrel and flows out through the liquid outlet, and the gas outlet pipe can be used for discharging gas in the outer barrel. The dealcoholization effect of the feed liquid is good, and the equipment structure and the process are simple.

Description

Technical Field

[0001] The present invention relates to the technical field of liquid wine dealcoholization, and particularly relates to a rotary vacuum evaporator suitable for liquid wine dealcoholization and a dealcoholization method. Background Art

[0002] In the prior art, wine dealcoholization refers to a technology for separating alcohol from fruit wine, wine, beer, yellow rice wine, etc. after brewing, so as to produce non-alcoholic fruit wine, non-alcoholic wine, non-alcoholic beer, non-alcoholic yellow rice wine. Generally, it is required that the alcohol content of the wine after dealcoholization is lower than 0.5% (VOL). At present, there are roughly the following common processes for wine dealcoholization: reverse osmosis method, dealcoholic strain immobilization technology, supercritical carbon dioxide extraction method, etc. However, the implementation of the above processes and equipment is relatively complex, and the equipment cost is high. There is also the use of high-temperature distillation to achieve dealcoholization, but the wine liquid will cause loss of flavor after high temperature. Due to the limitations of the process and equipment, non-alcoholic wine is difficult to popularize. Therefore, a technical solution is needed to solve the above problems. Summary of the Invention

[0003] In view of the above technical requirements, the present invention provides a rotary vacuum evaporator suitable for liquid wine dealcoholization and a dealcoholization method.

[0004] The present invention provides a rotary vacuum evaporator suitable for liquid wine dealcoholization; it includes an outer cylinder, an inner cylinder and a rotating shaft. The outer cylinder, the inner cylinder and the rotating shaft are concentrically arranged. The rotating shaft is horizontally arranged. The inner cylinder is fixedly connected to the rotating shaft. The rotating shaft is connected to the outer cylinder through bearings. The inner cylinder can rotate. The outer cylinder can be heated. The inner cylinder is located inside the outer cylinder. The inner cylinder includes a plurality of conical cylinders. The plurality of conical cylinders are sleeved from the inside to the outside. The large-diameter ends of two adjacent sleeved cylinders face in opposite directions. The conical cylinder includes a plurality of through holes. The through holes are located on the side wall of the large-diameter end of the conical cylinder and are annularly distributed. The outer cylinder includes a liquid inlet pipe, a gas outlet pipe and a liquid outlet. A part of the liquid inlet pipe extends into the innermost conical cylinder. The liquid inlet pipe extends into the innermost conical cylinder from the small-diameter end. The inside of the outer cylinder is in a vacuum environment. The liquid material to be dealcoholized flows into the innermost conical cylinder from the liquid inlet pipe. The liquid material can flow from the small-diameter end of the conical cylinder to the large-diameter end of the conical cylinder, and then flow from the innermost conical cylinder to the outermost conical cylinder and finally flow into the outer cylinder and flow out through the liquid outlet. The gas outlet pipe can discharge the gas in the outer cylinder.

[0005] Further, it includes a motor. The outer cylinder includes a cylinder body, a first end cover and a second end cover. The cylinder body includes an end plate. The first end cover and the second end cover are respectively installed at both ends of the cylinder body. The first end cover is installed on the end plate. The motor is installed on the first end cover. The motor is connected to the rotating shaft. The rotating shaft penetrates the end cover, the end plate and is connected to the second end cover. The rotating shaft is connected to the end plate through a bearing. The rotating shaft is connected to the second end cover through a bearing.

[0006] Further, a part of the inner cylinder is located inside the second end cap, the large-diameter end of the outermost conical cylinder is located inside the second end cap, the liquid inlet pipe, the gas outlet pipe and the liquid outlet are located on the second end cap, the liquid outlet is located at the lower end of the second end cap, the cylinder body includes a baffle plate, and the baffle plate is located on the end face where the cylinder body is connected to the second end cap.

[0007] Further, the inner cylinder includes a liquid blocking ring, the liquid blocking ring is located on the outer wall of the outermost conical cylinder, and the liquid blocking ring is located on the side of the through hole of the outermost conical cylinder facing the small-diameter end and close to the through hole.

[0008] Further, the inner cylinder includes a first sealing plate and a second sealing plate. Both ends of several conical cylinders are fixedly connected to the first sealing plate and the second sealing plate respectively. The first sealing plate and the second sealing plate are fixedly connected to the rotating shaft. The second sealing plate is provided with an opening, and a part of the liquid inlet pipe passes through the opening and extends into the inner part of the inner cylinder.

[0009] Further, the rotating shaft is fixedly installed with a support plate. The support plate is located inside the innermost conical cylinder. The support plate is fixedly connected to the second sealing plate through several connecting rods. The support plate is close to the small-diameter end of the innermost conical cylinder, and a part of the liquid inlet pipe is located between the support plate and the second sealing plate.

[0010] Further, a part of the gas outlet pipe extends into the inside of the innermost conical cylinder.

[0011] Further, the outer wall of the outer cylinder is coated and installed with heating silica gel, and the inner wall of the outer cylinder and the outer wall of the inner cylinder are both sprayed with graphene coatings.

[0012] Further, it includes a first liquid collection bucket and a second liquid collection bucket. The liquid outlet is connected to the first liquid collection bucket, the first liquid collection bucket is connected to the second liquid collection bucket, the horizontal height of the second liquid collection bucket is lower than that of the first liquid collection bucket. A first valve is installed between the liquid outlet and the first liquid collection bucket, a second valve is installed between the first liquid collection bucket and the second liquid collection bucket. The second liquid collection bucket includes a liquid outlet pipe and a gas extraction pipe. A third valve is installed on the liquid outlet pipe, and a fourth valve is installed on the gas extraction pipe.

[0013] Further, a method for alcohol removal uses a rotary vacuum evaporator suitable for liquid alcohol removal, and includes the following steps:

[0014] S1. Valve opening and closing: Open the gas outlet pipe, the first valve, and the second valve, and close the liquid inlet pipe, the third valve, and the fourth valve.

[0015] S2. Heating: Turn on the heating silica gel and heat up to 150 °C and keep the temperature constant.

[0016] S3. Vacuum: Connect the gas outlet pipe to the vacuum system, and turn on the vacuum system until the vacuum gauge shows -0.095 Mpa.

[0017] S4. Inner cylinder rotation: Turn on the motor and adjust the rotation speed to 60 r / min.

[0018] S5. Distillation: Open the liquid inlet pipe and input the feed liquid into the small-diameter end of the innermost conical cylinder inside the inner cylinder. Since the inner cylinder is rotating, the input feed liquid will be distributed on the inner surface of the innermost conical cylinder and move towards the large-diameter end of the innermost conical cylinder. While undergoing vacuum evaporation, the feed liquid moves to the through holes of the innermost conical cylinder and leaks out into the inner wall of the next conical cylinder and continues to move towards the large-diameter end of the conical cylinder. Finally, the remaining feed liquid flows out from the through holes of the outermost conical cylinder and into the outer cylinder. The feed liquid flows from the liquid outlet to the first liquid collection barrel and then is stored in the second liquid collection barrel. The gas generated by vacuum evaporation inside the outer cylinder is discharged through the gas outlet pipe.

[0019] S6. Discharging: When the second liquid collection barrel is full, the feed liquid will be automatically stored in the first liquid collection barrel. At this time, close the second valve, open the third valve and the fourth valve, and the liquid in the second liquid collection barrel is discharged, ending the discharging process.

[0020] S7. Re-collection: Close the third valve and the fourth valve again, and open the second valve. At this time, all the liquid in the first liquid collection barrel flows into the second liquid collection barrel, entering the next round of collection cycle.

[0021] Compared with the related technology, a rotary vacuum evaporator and a de-alcoholization method suitable for liquid wine de-alcoholization provided by the present invention have the following beneficial effects:

[0022] 1. The inside of the outer cylinder in the present invention is in a vacuum environment. In a vacuum environment, the boiling point of the components in the feed liquid will be greatly reduced, so the temperature required to heat the low-boiling point substances will also be reduced. There is no need to use high temperature for evaporation, and the flavor of the wine liquid will not be damaged.

[0023] 2. In the present invention, the outer cylinder is fixed and the inner cylinder rotates. The inner cylinder is composed of several conical cylinders with different diameters sleeved together from the inside to the outside, and the large-diameter ends of adjacent conical cylinders face in opposite directions. The feed liquid to be de-alcoholized flows into the innermost conical cylinder from the liquid inlet pipe. The feed liquid can flow from the small-diameter end of the conical cylinder to the large-diameter end of the conical cylinder and then from the innermost conical cylinder to the outermost conical cylinder and finally flow into the outer cylinder and out through the liquid outlet. When the feed liquid rotates in the conical tank, a feed liquid film is formed on the inner wall of the conical cylinder, greatly increasing the evaporation time and area of the feed liquid inside the inner cylinder, and enabling better de-alcoholization effect of the feed liquid.

[0024] 3. The outer wall of the outer cylinder in the present invention is covered and installed with heating silica gel, which can control the temperature. The inner wall of the outer cylinder is sprayed with a graphene coating. The graphene coating can effectively receive the thermal energy of the heating silica gel strip on the outer wall of the outer cylinder and convert it into radiant thermal energy to radiate heat into the vacuum barrel. The outer surface of the outermost conical cylinder in the inner cylinder is also sprayed with a graphene coating, which is convenient for receiving the radiant thermal energy from the inner wall of the outer cylinder, so as to realize efficient heating of the liquid material and the heat source without contact.

[0025] 4. In the present invention, the liquid material after alcohol removal is collected through the first liquid collecting barrel and the second liquid collecting barrel. The first liquid collecting barrel and the second liquid collecting barrel maintain the same vacuum environment as that inside the outer cylinder during collection. The second liquid collecting barrel is arranged lower than the first liquid collecting barrel, so that the liquid material in the first liquid collecting barrel can flow into the second liquid collecting barrel under the influence of gravity. When the second liquid collecting barrel is full, the first liquid collecting barrel is blocked, and the liquid material in the second liquid collecting barrel is discharged. During the discharging process of the second liquid collecting barrel, the first liquid collecting barrel plays a role of temporary storage, which can prevent the vacuum environment inside the outer cylinder from being damaged. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] Figure 1 is a schematic diagram of this embodiment.

[0027] Figure 2 is a cross-sectional view of this embodiment.

[0028] Figure 3 is a schematic diagram of the second end cover separated in this embodiment.

[0029] Figure 4 is a schematic diagram of the alcohol removal method in this embodiment.

[0030] Reference numerals in the drawings: 1. Outer cylinder; 11. Cylinder body; 111. Baffle; 112. Heating silica gel; 113. Graphene coating; 114. End plate; 12. First end cover; 13. Second end cover; 131. Liquid outlet; 2. Inner cylinder; 21. Conical cylinder; 211. Through hole; 212. Liquid blocking ring; 3. Motor; 31. Rotating shaft; 311. Support plate; 312. Connecting rod; 32. Bearing; 4. First sealing plate; 5. Second sealing plate; 51. Opening; 6. Liquid inlet pipe; 7. Air outlet pipe; 8. First liquid collecting barrel; 9. Second liquid collecting barrel; 91. Liquid outlet pipe; 92. Air extraction pipe; 101. First valve; 102. Second valve; 103. Third valve; 104. Fourth valve. DETAILED DESCRIPTION OF THE EMBODIMENT

[0031] For the convenience of understanding the present invention, the present invention will be described more comprehensively below with reference to the relevant drawings. The typical embodiments of the present invention are shown in the drawings.

[0032] Such as Figure 1 、 Figure 2 、 Figure 3As shown in the figure, this embodiment discloses a rotary vacuum evaporator suitable for the de-alcoholization of liquid wine, which includes an outer cylinder 1, an inner cylinder 2, a rotating shaft 31, and a motor 3. The outer cylinder 1, the inner cylinder 2, and the rotating shaft 31 are concentrically arranged. The inner cylinder 2 is fixedly connected to the rotating shaft 31. The rotating shaft 31 is connected to the outer cylinder 1 through a bearing 32. The inner cylinder 2 can rotate. The rotating shaft 31 is horizontally arranged, and the outer cylinder 1 is a horizontally arranged cylindrical shape. The outer cylinder 1 includes a cylinder body 11, a first end cover 12, and a second end cover 13. The cylinder body 11 includes an end plate 114. The first end cover 12 and the second end cover 13 are respectively installed at both ends of the cylinder body 11. The first end cover 12 is installed on the end plate 114. The motor 3 is installed on the first end cover 12. The motor 3 is connected to the rotating shaft 31. The rotating shaft 31 passes through the end cover and the end plate 114 and is connected to the second end cover 13. The rotating shaft 31 is connected to the end plate 114 through a bearing 32, and the rotating shaft 31 is connected to the second end cover 13 through a bearing 32. The motor 3 is connected to the rotating shaft 31 through a coupling. The motor 3 can drive the rotating shaft 31 to rotate, and then drive the inner cylinder 2 to rotate. A sealing ring is provided on the part of the rotating shaft 31 passing through the first end cover 12, which can seal the inside of the outer cylinder 1.

[0033] As Figure 2 shown, the outer cylinder 1 can be heated. The outer wall of the outer cylinder 1 is coated and installed with heating silica gel 112. The inner wall of the outer cylinder 1 is sprayed with a graphene coating 113. The heating silica gel 112 is a temperature-controlled silica gel electric heating plate. The outer wall of the heating silica gel 112 is coated with a heat-insulating material to prevent the heat energy of the heating silica gel 112 from being lost. The purpose is to transfer the heat generated by the temperature-controlled silica gel electric heating plate to the outer cylinder 1 through heat conduction and conduct it to the sanitary graphene coating 113 inside the outer cylinder 1. The graphene coating 113 can transfer the heat to the inside of the outer cylinder 1 in the form of infrared radiation. The graphene coating 113 sprayed on the outer wall of the inner cylinder 2 receives the radiation of the graphene coating 113 on the inner wall of the outer cylinder 1, which can heat the inner cylinder 2, enabling non-contact heating of the liquid material and the heat source, preventing excessive evaporation of the liquid material, and preventing the liquid material from drying up inside the inner cylinder 2.

[0034] As Figure 2 shown, the inner cylinder 2 is located inside the outer cylinder 1. The inner cylinder 2 includes several conical cylinders 21. Figure 2The inner cylinder 2 therein consists of four conical cylinders 21. The diameters of the four conical cylinders 21 are all different. The four conical cylinders 21 are sleeved from the inside to the outside in ascending order. The large-diameter ends of two adjacent sleeved cylinders face in opposite directions. The conical cylinder 21 includes a number of through holes 211. The through holes 211 are located on the side wall of the large-diameter end of the conical cylinder 21 and are distributed in a ring shape. The outer cylinder 1 includes a liquid inlet pipe 6, an air outlet pipe 7, and a liquid outlet 131. A part of the liquid inlet pipe 6 extends into the innermost conical cylinder 21. The liquid inlet pipe 6 extends in from the small-diameter end of the innermost conical cylinder 21. The inside of the outer cylinder 1 is in a vacuum environment. The liquid to be de-alcoholized flows into the innermost conical cylinder 21 from the liquid inlet pipe 6. The liquid can flow from the small-diameter end of the conical cylinder 21 to the large-diameter end of the conical cylinder 21, and then flow from the innermost conical cylinder 21 to the outermost conical cylinder 21 and finally flow into the outer cylinder 1 and flow out through the liquid outlet 131. The liquid enters the small-diameter end of the inner conical cylinder 21 and flows towards the large-diameter end of the inner conical cylinder 21 under the action of gravity, and can sequentially flow from the conical cylinder 21 with the smallest diameter to the conical cylinder 21 with the largest diameter, increasing the residence time of the liquid inside the inner cylinder 2, improving the de-alcoholization effect of the liquid. And the inner cylinder 2 rotates continuously. During the process of the liquid flowing from the small-diameter end to the large-diameter end of the conical cylinder 21, the liquid will form a liquid film on the inner wall of the conical cylinder 21, greatly increasing the evaporation area of the liquid, making the heat evaporation effect of the liquid better and the de-alcoholization effect of the liquid better.

[0035] As Figure 2 shown, a part of the inner cylinder 2 is located inside the second end cap 13. The large-diameter end of the outermost conical cylinder 21 is located inside the second end cap 13. The liquid inside the inner cylinder 2 finally flows into the second end cap 13 of the outer cylinder 1 through the through holes 211 of the outermost conical cylinder 21. The second end cap 13 is frustum-shaped. The large-diameter end of the second end cap 13 is connected to the cylinder body 11. The liquid inlet pipe 6, the air outlet pipe 7, and the liquid outlet 131 are located on the second end cap 13. The liquid outlet 131 is located at the lower end of the second end cap 13 and is close to the large-diameter end of the second end cap 13. The liquid flowing into the second end cap 13 will flow along the inclined side wall of the second end cap 13 towards the liquid outlet 131. The cylinder body 11 includes a baffle 111. The baffle 111 is located on the end face where the cylinder body 11 is connected to the second end cap 13. The baffle 111 can block the liquid in the second end cap 13 from flowing into the cylinder body 11. The inner wall of the cylinder body 11 is sprayed with a graphene coating 113 to prevent the liquid from directly contacting the graphene coating 113 and prevent the liquid from contacting the high-temperature graphene coating 113 and drying up.

[0036] As Figure 2As shown, more preferably, the inner cylinder 2 includes a liquid baffle ring 212. The liquid baffle ring 212 is located on the outer wall of the outermost conical cylinder 21. The liquid baffle ring 212 is located on the side of the through hole 211 of the outermost conical cylinder 21 facing the small-diameter end and close to the through hole 211. The liquid baffle ring 212 is located inside the second end cap 13. Since the inner cylinder 2 rotates continuously, a small amount of liquid material may flow along the outer wall of the inner cylinder 2 towards the small-diameter end of the inner cylinder 2. The liquid baffle ring 212 can effectively block the liquid material flowing out of the through hole 211 of the outermost conical cylinder 21, prevent the liquid material from contacting the graphene coating 113 on the outer wall of the inner cylinder 2, and prevent the liquid material from flowing into the inside of the cylinder body 11.

[0037] As Figure 2 , Figure 3 As shown, the inner cylinder 2 includes a first sealing plate 4 and a second sealing plate 5. Both ends of several conical cylinders 21 are respectively fixedly connected to the first sealing plate 4 and the second sealing plate 5. The first sealing plate 4 and the second sealing plate 5 respectively fixedly support both ends of several conical cylinders 21. Several conical cylinders 21 are all concentrically installed. The first sealing plate 4 and the second sealing plate 5 are fixedly connected to the rotating shaft 31. The rotating shaft 31 is fixedly installed with a support plate 311. The support plate 311 is located inside the innermost conical cylinder 21. The support plate 311 is fixedly connected to the second sealing plate 5 through several connecting rods 312. The second sealing plate 5 is provided with an opening 51. There is a distance between the support plate 311 and the second sealing plate 5. The support plate 311 is close to the small-diameter end of the innermost conical cylinder 21. A part of the liquid inlet pipe 6 is located between the support plate 311 and the second sealing plate 5. A part of the liquid inlet pipe 6 passes through the opening 51 and extends into the inside of the inner cylinder 2. The liquid outlet end of the liquid inlet pipe 6 can extend into the innermost conical cylinder 21 through the opening 51 to convey the liquid material to the inside of the small-diameter end of the inner cylinder 2.

[0038] As Figure 2 As shown, more preferably, the gas outlet pipe 7 can discharge the gas inside the inner cylinder 2. The inner cylinder 2 communicates with the outer cylinder 1. All the gas inside the entire outer cylinder 1 can be discharged through the gas outlet pipe 7. A part of the gas outlet pipe 7 extends into the inside of the innermost conical cylinder 21. The liquid material in the inner cylinder 2 continuously undergoes vacuum evaporation. Low-boiling substances are continuously vaporized. The vaporized gas is discharged and collected through the gas outlet pipe 7. When the gas contacts the gas outlet pipe 7 and releases heat, it will re-condense into a liquid again. To prevent the liquid condensed from the gas in the gas outlet pipe 7 from flowing into the liquid material inside the second end cap 13, the end of the gas outlet pipe 7 located inside the outer cylinder 1 extends into the innermost conical cylinder 21 of the inner cylinder 2, so that the condensed liquid can be evaporated again, making the alcohol removal of the liquid material better.

[0039] As Figure 4As shown in the figure, this embodiment further includes a first liquid collecting bucket 8 and a second liquid collecting bucket 9. The liquid outlet 131 is connected to the first liquid collecting bucket 8, the first liquid collecting bucket 8 is connected to the second liquid collecting bucket 9, the horizontal height of the second liquid collecting bucket 9 is lower than that of the first liquid collecting bucket 8. The first liquid collecting bucket 8 is used for temporarily storing the liquid material, and the second liquid collecting bucket 9 is used for collecting and discharging the liquid material. A first valve 101 is installed between the liquid outlet 131 and the first liquid collecting bucket 8, and a second valve 102 is installed between the first liquid collecting bucket 8 and the second liquid collecting bucket 9. The second liquid collecting bucket 9 includes a liquid outlet pipe 91 and an air extraction pipe 92. A third valve 103 is installed on the liquid outlet pipe 91, and a fourth valve 104 is installed on the air extraction pipe 92. The fourth valve 104 is opened simultaneously when the third valve 103 is opened, and is used to balance the air pressure in the second liquid collecting bucket 9 during liquid discharge.

[0040] This embodiment also discloses a method for removing alcohol, which uses a rotary vacuum evaporator suitable for removing alcohol from liquid wine, and includes the following steps:

[0041] S1. Valve opening and closing: Open the air outlet pipe 7, the first valve 101, and the second valve 102, and close the liquid inlet pipe 6, the third valve 103, and the fourth valve 104.

[0042] S2. Heating: Open the heating silica gel 112 and heat it up to 150 °C and keep the temperature constant.

[0043] S3. Vacuum: Connect the air outlet pipe 7 to the vacuum system, and turn on the vacuum system until the vacuum gauge shows -0.095 Mpa.

[0044] S4. Inner cylinder rotation: Turn on the motor 3 and adjust the rotation speed to 60 r / min.

[0045] S5. Distillation: Open the liquid inlet pipe 6, and input the liquid material to the small diameter end of the innermost conical cylinder 21 of the inner cylinder 2. Since the inner cylinder 2 is rotating, the input liquid material will be distributed on the inner surface of the innermost conical cylinder 21 and move towards the large diameter end of the innermost conical cylinder 21. The liquid material moves while undergoing vacuum evaporation and leaks out through the through hole 211 of the innermost conical cylinder 21 and enters the inner wall of the next conical cylinder 21 and continues to move towards the large diameter end of the conical cylinder 21. Finally, the remaining liquid material flows out through the through hole 211 of the outermost conical cylinder 21 and into the outer cylinder 1. The liquid material flows from the liquid outlet 131 to the first liquid collecting bucket 8 and then is stored in the second liquid collecting bucket 9. The gas generated by vacuum evaporation in the outer cylinder 1 is discharged and collected through the air outlet pipe 7.

[0046] S6. Discharging: When the second liquid collecting bucket 9 is full, the liquid material will automatically be stored in the first liquid collecting bucket 8. At this time, close the second valve 102, open the third valve 103 and the fourth valve 104, and the liquid in the second liquid collecting bucket 9 is discharged, and the discharging process ends.

[0047] S7. Re - collection: Re - close the third valve 103 and the fourth valve 104, and open the second valve 102. At this time, all the liquid in the first liquid collection barrel 8 flows into the second liquid collection barrel 9, entering the next round of collection cycle.

[0048] In this embodiment, the defoamed liquid is collected through the first liquid collection barrel 8 and the second liquid collection barrel 9. When collecting, the first liquid collection barrel 8 and the second liquid collection barrel 9 maintain the same vacuum environment as that inside the outer cylinder 1. The second liquid collection barrel 9 is arranged lower than the first liquid collection barrel 8, so that the liquid in the first liquid collection barrel 8 can flow towards the second liquid collection barrel 9 under the influence of gravity. When the second liquid collection barrel 9 is full, close the second valve 102 and discharge the liquid in the second liquid collection barrel 9. During the discharging process of the second liquid collection barrel 9, the first liquid collection barrel 8 plays a role of temporary storage, which can prevent the vacuum environment inside the outer cylinder 1 from being damaged. When the second liquid collection barrel 9 is re - connected to the first liquid collection barrel 8, although the vacuum environments inside the first liquid collection barrel 8 and the outer cylinder 1 will be affected to a certain extent, the air pressure inside the second liquid collection barrel 9 can be quickly balanced, and the influence is not significant and can be ignored.

[0049] The above - mentioned defoaming method of this embodiment is applicable to the defoaming of the liquid when a small amount of liquid continuously enters the liquid outlet 131, and can evaporate the low - boiling - point substances in the liquid more completely. This embodiment can also perform a second defoaming mode. When the liquid flow rate entering the liquid outlet 131 is large, it is not possible to evaporate the liquid well by radiation heating. At this time, the liquid can be pre - heated before entering the outer cylinder 1, and the pre - heated liquid quickly passes through the inner cylinder 2 for evaporation and defoaming and then is sent out. The liquid can pass through the outer cylinder 1 multiple times quickly for defoaming, and the alcohol content in the liquid can be gradually reduced to achieve the required effect.

[0050] Although the embodiments of the present invention have been shown and described, for those of ordinary skill in the art, it can be understood that various changes, modifications, substitutions, and variations can be made to these embodiments without departing from the principles and spirit of the present invention. The scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A rotary vacuum evaporator suitable for the dealcoholization of liquid wine, characterized in that: It includes an outer cylinder (1), an inner cylinder (2) and a rotating shaft (31). The outer cylinder (1), the inner cylinder (2) and the rotating shaft (31) are concentrically arranged. The rotating shaft (31) is horizontally arranged. The inner cylinder (2) is fixedly connected to the rotating shaft (31). The rotating shaft (31) is connected to the outer cylinder (1) through a bearing (32). The inner cylinder (2) can rotate. The outer cylinder (1) can be heated. The inner cylinder (2) is located inside the outer cylinder (1). The inner cylinder (2) includes a number of conical cylinders (21). The number of the conical cylinders (21) are sleeved from the inside to the outside. The large-diameter ends of two adjacent sleeved cylinders face in opposite directions. The conical cylinder (21) includes a number of through holes (211). The through holes (211) are located on the side wall of the large-diameter end of the conical cylinder (21) and are annularly distributed. The outer cylinder (1) includes a liquid inlet pipe (6), a gas outlet pipe (7) and a liquid outlet (131). A part of the liquid inlet pipe (6) extends into the innermost conical cylinder (21). The liquid inlet pipe (6) extends into the innermost conical cylinder (21) from the small-diameter end. The inside of the outer cylinder (1) is a vacuum environment. The material liquid to be de-alcoholized flows into the innermost conical cylinder (21) from the liquid inlet pipe (6). The material liquid can flow from the small-diameter end of the conical cylinder (21) to the large-diameter end of the conical cylinder (21), and then from the innermost conical cylinder (21) to the outermost conical cylinder (21) and finally flow into the outer cylinder (1) and flow out through the liquid outlet (131). The gas outlet pipe (7) can discharge the gas in the outer cylinder (1).

2. The rotary vacuum evaporator suitable for liquid wine dealcoholization according to claim 1, wherein: It includes a motor (3). The outer cylinder (1) includes a cylinder body (11), an end cover one (12) and an end cover two (13). The cylinder body (11) includes an end plate (114). The end cover one (12) and the end cover two (13) are respectively installed at both ends of the cylinder body (11). The end cover one (12) is installed on the end plate (114). The motor (3) is installed on the end cover one (12). The motor (3) is connected to the rotating shaft (31). The rotating shaft (31) penetrates the end cover and the end plate (114) and is connected to the end cover two (13). The rotating shaft (31) is connected to the end plate (114) through a bearing (32). The rotating shaft (31) is connected to the end cover two (13) through a bearing (32).

3. The rotary vacuum evaporator suitable for liquid alcohol de-alcoholization according to claim 2, wherein: A part of the inner cylinder (2) is located inside the end cover two (13). The large-diameter end of the outermost conical cylinder (21) is located inside the end cover two (13). The liquid inlet pipe (6), the gas outlet pipe (7) and the liquid outlet (131) are located on the end cover two (13). The liquid outlet (131) is located at the lower end of the end cover two (13). The cylinder body (11) includes a baffle (111). The baffle (111) is located on the end face where the cylinder body (11) is connected to the end cover two (13).

4. A rotary vacuum evaporator suitable for the dealcoholization of liquid wine according to claim 1, characterized in that: The inner cylinder (2) includes a liquid retaining ring (212). The liquid retaining ring (212) is located on the outer wall of the outermost conical cylinder (21). The liquid retaining ring (212) is located on the side of the through hole (211) of the outermost conical cylinder (21) facing the small-diameter end and is close to the through hole (211).

5. A rotary vacuum evaporator suitable for the dealcoholization of liquid wine according to claim 1, characterized in that: The inner cylinder (2) includes a first sealing plate (4) and a second sealing plate (5). Both ends of a plurality of the conical cylinders (21) are respectively fixedly connected to the first sealing plate (4) and the second sealing plate (5). The first sealing plate (4) and the second sealing plate (5) are fixedly connected to the rotating shaft (31). The second sealing plate (5) is provided with an opening (51), and a part of the liquid inlet pipe (6) passes through the opening (51) and extends into the inner cylinder (2).

6. The rotary vacuum evaporator suitable for liquid wine dealcoholization according to claim 5, characterized in that: The rotating shaft (31) is fixedly installed with a support plate (311). The support plate (311) is located inside the innermost conical cylinder (21). The support plate (311) is fixedly connected to the second sealing plate (5) through a plurality of connecting rods (312). The support plate (311) is close to the small-diameter end of the innermost conical cylinder (21), and a part of the liquid inlet pipe (6) is located between the support plate (311) and the second sealing plate (5).

7. A rotary vacuum evaporator suitable for the dealcoholization of liquid wine according to claim 1, characterized in that: A part of the gas outlet pipe (7) extends into the innermost conical cylinder (21).

8. A rotary vacuum evaporator suitable for the dealcoholization of liquid wine according to claim 1, characterized in that: The outer wall of the outer cylinder (1) is coated and installed with heating silica gel (112), and graphene coatings (113) are sprayed on the inner wall of the outer cylinder (1) and the outer wall of the inner cylinder (2).

9. A rotary vacuum evaporator suitable for the dealcoholization of liquid wine according to claim 1, characterized in that: It includes a first liquid collecting bucket (8) and a second liquid collecting bucket (9). The liquid outlet (131) is connected to the first liquid collecting bucket (8). The first liquid collecting bucket (8) is connected to the second liquid collecting bucket (9). The horizontal height of the second liquid collecting bucket (9) is lower than that of the first liquid collecting bucket (8). A first valve (101) is installed between the liquid outlet (131) and the first liquid collecting bucket (8). A second valve (102) is installed between the first liquid collecting bucket (8) and the second liquid collecting bucket (9). The second liquid collecting bucket (9) includes a liquid outlet pipe (91) and an air extraction pipe (92). A third valve (103) is installed on the liquid outlet pipe (91), and a fourth valve (104) is installed on the air extraction pipe (92).

10. A method for alcohol removal, which uses a rotary vacuum evaporator suitable for liquid alcohol removal described in any one of claims 1-9, characterized in that: It includes the following steps: S1. Valve opening and closing: Open the gas outlet pipe (7), the first valve (101), and the second valve (102), and close the liquid inlet pipe (6), the third valve (103), and the fourth valve (104). S2. Heating: Turn on the heating silica gel (112) and heat it up to 150 °C and keep the temperature constant. S3. Vacuum: Connect the gas outlet pipe (7) to the vacuum system, and turn on the vacuum system until the vacuum gauge shows -0.095 Mpa. S4. Rotation of the inner cylinder: Turn on the motor (3) and adjust the rotation speed to 60 r / min. S5. Distillation: Open the liquid inlet pipe (6) and input the feed liquid to the small-diameter end of the innermost conical cylinder (21) of the inner cylinder (2). Since the inner cylinder (2) is rotating, the input feed liquid will be distributed on the inner surface of the innermost conical cylinder (21) and move towards the large-diameter end of the innermost conical cylinder (21). While undergoing vacuum evaporation, the feed liquid moves to the through-hole (211) of the innermost conical cylinder (21) and leaks out to enter the inner wall of the next conical cylinder (21) and continues to move towards the large-diameter end of the conical cylinder (21). Finally, the remaining feed liquid flows out from the through-hole (211) of the outermost conical cylinder (21) and into the outer cylinder (1). The feed liquid flows from the liquid outlet (131) to the first liquid collection bucket (8) and then is stored in the second liquid collection bucket (9). The gas generated by vacuum evaporation in the outer cylinder (1) is discharged through the gas outlet pipe (7). S6. Discharging: When the second liquid collection bucket (9) is full, the feed liquid will automatically be stored in the first liquid collection bucket (8). At this time, close the second valve (102), open the third valve (103) and the fourth valve (104), and the liquid in the second liquid collection bucket (9) is discharged, ending the discharging process. S7. Re-collection: Close the third valve (103) and the fourth valve (104) again, and open the second valve (102). At this time, all the liquid in the first liquid collection bucket (8) flows into the second liquid collection bucket (9), entering the next round of collection cycle.

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