Rectification device for reducing fusel oil in baijiu and rectification method thereof

Abstract

The application provides a rectification device and method for reducing fusel oil in baijiu, and belongs to the technical field of baijiu rectification. The rectification device and method for reducing fusel oil in baijiu comprise a heating tank, a distillation tower, a condenser, a collecting tank and an acceleration mechanism, the heating tank, the distillation tower, the condenser and the collecting tank are arranged from left to right, and a heater is fixedly installed on the inner wall of the heating tank; the acceleration mechanism is arranged on the heating tank. By starting the pump body and the first motor, the pump body sucks the original baijiu, which is sprayed out through five first nozzles, so that the baijiu enters the heating tank from different positions, the area of contact with heat is increased, the output end of the first motor drives the rotating shaft to rotate, the rotating shaft drives the stirring blade to rotate, the original baijiu is stirred, at the same time, the cross rod rotates and drives the vertical rod to rotate, at the same time, the original baijiu passes through the turbulence hole, auxiliary stirring and turbulence are realized, the heat exchange area of the original baijiu and heat is further increased, and the evaporation efficiency is improved.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of white spirit distillation, in particular to a distillation device for reducing fusel oil in white spirit and a distillation method thereof. BACKGROUND

[0002] Fusel oil in white spirit is a byproduct of normal yeast metabolism during the fermentation process. The appropriate content of fusel oil and the appropriate proportion of various flavor substances in white spirit can make the wine full and round, soft and coordinated in taste, and unique in flavor. Excessive fusel oil content seriously affects the taste of the wine, resulting in a spicy, bitter product, which is toxic to the human body. Fusel oil is oxidized and decomposed more slowly than ethanol in the human body, stays longer, and can cause headaches, dry mouth, hangovers, palpitations, vomiting, and other symptoms of the nervous system. Methods for reducing the content of fusel oil in white spirit include the following:

[0003] 1. Select high-quality raw materials: Select high-quality edible alcohol as the raw material of white spirit to ensure the purity and quality of the raw material and reduce the content of fusel oil;

[0004] 2. Control the fermentation process: During the fermentation process of white spirit, factors such as temperature, time, and pH value should be controlled to reduce the generation of fusel oil;

[0005] 3. Adopt scientific distillation process: In the distillation process, scientific distillation processes such as rectification and reflux can effectively separate fusel oil and reduce its content;

[0006] 4. Reasonable storage and aging: During the storage and aging of white spirit, appropriate temperature and humidity should be maintained to avoid mold and other problems, thereby reducing the generation of fusel oil;

[0007] 5. Strengthen quality control: White spirit production enterprises should strengthen quality control, establish a perfect detection system to ensure the quality and safety of white spirit, and reduce the content of fusel oil; among them, rectification is a very effective method for reducing fusel oil in white spirit.

[0008] When using a rectification device to reduce fusel oil in white spirit, the original wine needs to be heated first to reach the evaporation temperature, and then collected by the collection tank after distillation and condensation. However, the existing technology has the following disadvantages:

[0009] 1. In the heating and evaporation process, the existing method is to pour the original wine into the tank, and then heat it to evaporate by the heater. However, the heat exchange area between the original wine and the heat generated by the heater is very low during the heating process, resulting in low evaporation efficiency;

[0010] 2. In the process of collecting the rectified wine, small water droplets formed by the wine will adhere to the tank wall, resulting in a decrease in the wine yield.

[0011] In view of this, in order to overcome the above technical problems, the present application provides a rectifying device for reducing fusel oil in liquor and a rectifying method thereof, which solves the above technical problems. SUMMARY

[0012] In order to make up for the above shortcomings, the present application provides a rectifying device for reducing fusel oil in liquor and a rectifying method thereof, which overcomes the above technical problems or at least partially solves the above problems.

[0013] To achieve the above object, the present application provides the following technical scheme:

[0014] A rectifying device for reducing fusel oil in liquor and a rectifying method thereof, comprising:

[0015] A heating tank, a distillation column, a condenser and a collection tank are arranged from left to right, and a heater is fixedly installed on the inner wall of the heating tank;

[0016] An acceleration mechanism is arranged on the heating tank, and the acceleration mechanism comprises:

[0017] A pump body is fixedly installed on the left side of the heating tank;

[0018] A liquid inlet pipe is fixedly connected with the water inlet of the pump body, and the liquid inlet pipe is used for connecting a wine tank;

[0019] A liquid outlet pipe is fixedly connected with the water outlet of the pump body;

[0020] A connecting pipe is fixedly connected with the liquid outlet pipe;

[0021] A spray pipe is fixedly connected with the connecting pipe, and the spray pipe is fixedly connected with the heating tank;

[0022] A first spray head is fixedly connected with the other end of the spray pipe, and the first spray head is arranged in the interior of the heating tank;

[0023] A first motor is fixedly connected with the bottom of the heating tank;

[0024] A rotating shaft is fixedly connected with the output end of the first motor, and the rotating shaft is rotatably connected with the heating tank;

[0025] A stirring blade is fixedly connected with the rotating shaft;

[0026] A scraping mechanism is arranged on the collection tank.

[0027] In an embodiment of the present application,

[0028] The scraping mechanism comprises:

[0029] The second motor is fixed on the top of the collecting tank.

[0030] The screw rod is fixed on the output end of the second motor, and is rotationally connected with the collecting tank through a bearing.

[0031] The limiting rod is fixedly connected between the inner walls of the collecting tank.

[0032] The sliding block is threadedly connected with the screw rod and is slidingly connected with the limiting rod.

[0033] The connecting rod is fixedly connected with the outer wall of the sliding block.

[0034] The scraper is fixedly connected with the outer side of the connecting rod.

[0035] In one embodiment of the present application, the outer wall of the rotating shaft is fixedly connected with a cross rod, the top of the cross rod is fixedly connected with a vertical rod, the cross rod and the vertical rod are both provided with three, the three cross rods and the three vertical rods are both arranged at equal distances in a ring shape, a plurality of turbulence holes are formed in the cross rod and the vertical rod, the plurality of turbulence holes are different in diameter and irregularly arranged, the five spray pipes and the five first nozzles are arranged at equal distances.

[0036] In one embodiment of the present application, the inner wall of the collecting tank is provided with a first receiving groove, a second receiving groove and a third receiving groove, the second receiving groove is provided with two, the two second receiving grooves are both in communication with the first receiving groove and the third receiving groove, the first receiving groove, the second receiving groove and the third receiving groove are respectively matched with the sliding block, the connecting rod and the scraper.

[0037] In one embodiment of the present application, the bottom of the heating tank is fixedly connected with a base, the distillation tower, the condenser and the collecting tank are all fixedly connected on the top of the base, and the base is fixedly connected with a support between the pump body.

[0038] In one embodiment of the present application, the first conveying pipe is fixedly connected between the gas outlet of the heating tank and the gas inlet of the distillation tower, and the second conveying pipe is fixedly connected between the gas outlet of the distillation tower and the input end of the condenser.

[0039] In one embodiment of the present application, the third conveying pipe is fixedly connected between the output end of the condenser and the liquid inlet of the collecting tank, the fourth conveying pipe is fixedly connected with the liquid outlet of the collecting tank, and the first one-way valve and the second one-way valve are respectively installed on the third conveying pipe and the fourth conveying pipe.

[0040] In one embodiment of the present application, the water inlet of the distillation tower is fixedly connected with a water inlet pipe, one end of the water inlet pipe is used for connecting an external water pipe, a drain valve is arranged on the distillation tower, the other end of the water inlet pipe is fixedly connected with a second spray head, the inner wall of the distillation tower is fixedly connected with fractionating plates, six fractionating plates are arranged.

[0041] A rectification method for reducing fusel oil in Baijiu (Chinese liquor), the steps of the method are as follows

[0042] S: heating and evaporation: first, connect the liquid inlet pipe to the wine tank, start the pump body to pump the wine into the heating tank, spray out through multiple first spray heads, heat through the heater and stir simultaneously to reach the evaporation temperature;

[0043] S: distillation: the evaporated wine enters the bottom of the distillation tower through the first conveying pipe, water is sprayed out from the second spray head through the water inlet pipe and falls from the tower, wine gas rises in the tower, in the tower, steam and falling liquid contact each other to realize mass transfer and heat transfer, due to the higher boiling point of fusel oil than that of alcohol, most of the fusel oil is gradually separated on different fractionating plates after contacting with water;

[0044] S: condensation and collection: after passing through the condenser, the steam is liquefied into liquid and enters the collection tank through the third conveying pipe for collection.

[0045] The present application provides a rectification device and method for reducing fusel oil in Baijiu (Chinese liquor), which has the following beneficial effects:

[0046] 1. By starting the pump body and the first motor, the pump body sucks the original wine and sprays it out through five first spray heads, so that the Baijiu enters the heating tank from different positions to increase the contact area with heat, the output end of the first motor drives the rotating shaft to rotate, the rotating shaft drives the stirring blade to rotate, and the original wine is stirred, at the same time, the horizontal rod rotates and drives the vertical rod to rotate, and at the same time, the original wine passes through the turbulence hole to assist stirring and turbulence, further increasing the heat exchange area of the original wine with heat, and improving the evaporation efficiency.

[0047] 2. By the second motor, the output end of the second motor drives the screw rod to rotate, under the limitation of the limiting rod, the sliding block slides downward, the sliding block drives the scraper to descend through the connecting rod, the scraper scrapes off the water droplets in the collection tank, so that the wine is concentrated in the collection tank, and the wine yield is improved.

[0048] 3. By arranging the first receiving groove, the second receiving groove and the third receiving groove, when scraping is not performed, the sliding block, the connecting rod and the scraper are respectively arranged in the first receiving groove, the second receiving groove and the third receiving groove, so that the water droplets formed by the wine can only adhere to the bottom of the sliding block, the connecting rod and the scraper. BRIEF DESCRIPTION OF DRAWINGS

[0049] To more clearly illustrate the technical solutions of the embodiments of the present invention, the accompanying drawings used in the embodiments will be briefly introduced below. It should be understood that the following drawings only show some embodiments of the present invention and should not be regarded as a limitation of the scope. For those skilled in the art, other related drawings can be obtained from these drawings without creative effort.

[0050] Figure 1 This is a perspective view provided by an embodiment of the present invention;

[0051] Figure 2 A cross-sectional view of a heating tank provided for an embodiment of the present invention;

[0052] Figure 3 A schematic diagram of the acceleration mechanism provided for an embodiment of the present invention;

[0053] Figure 4 A cross-sectional view of a distillation column provided for an embodiment of the present invention;

[0054] Figure 5 A schematic diagram of the fractionation plate structure provided for an embodiment of the present invention;

[0055] Figure 6 Cross-sectional view of the collection tank provided for an embodiment of the present invention. Figure 1 ;

[0056] Figure 7 Cross-sectional view of the collection tank provided for an embodiment of the present invention. Figure 2 ;

[0057] Figure 8 Cross-sectional view of the collection tank provided for an embodiment of the present invention. Figure 3 .

[0058] In the diagram: 1. Heating tank; 2. Distillation column; 3. Condenser; 4. Collection tank; 5. Acceleration mechanism; 501. Pump body; 502. Inlet pipe; 503. Outlet pipe; 504. Connecting pipe; 505. Spray pipe; 506. First nozzle; 507. First motor; 508. Rotating shaft; 509. Stirring blades; 510. Horizontal bar; 511. Vertical bar; 512. Turbulence hole; 6. Heater; 7. Scraping mechanism; 701. Second motor; 7 02. Lead screw; 703. Limiting rod; 704. Slider; 705. Connecting rod; 706. Scraper; 707. First collection slot; 708. Second collection slot; 709. Third collection slot; 8. Base; 9. Bracket; 10. First conveying pipe; 11. Second conveying pipe; 12. Third conveying pipe; 13. First one-way valve; 14. Fourth conveying pipe; 15. Second one-way valve; 16. Water inlet pipe; 17. Second nozzle; 18. Distillation plate. Detailed Implementation

[0059] In order to make the purposes, technical solutions and advantages of the embodiments of the present application clearer, the technical solutions in the embodiments of the present application will be described clearly and completely below with reference to the drawings in the embodiments of the present application. Obviously, the described embodiments are only some but not all of the embodiments of the present application. Based on the embodiments in the present application, all other embodiments obtained by those of ordinary skill in the art without creative work fall within the protection scope of the present application.

[0060] Embodiments

[0061] Please refer to Figures 1-8The application provides a technical scheme: a rectification device for reducing fusel oil in liquor and a rectification method thereof, which comprises a heating tank 1, a distillation column 2, a condenser 3 and a collection tank 4, wherein the heating tank 1, the distillation column 2, the condenser 3 and the collection tank 4 are arranged from left to right, a heater 6 is fixedly installed on the inner wall of the heating tank 1, an acceleration mechanism 5 is arranged on the heating tank 1, the acceleration mechanism 5 comprises a pump body 501, a liquid inlet pipe 502, a liquid outlet pipe 503, a connecting pipe 504, a spray pipe 505, a first spray head 506, a first motor 507, a rotating shaft 508 and stirring blades 509, the pump body 501 is fixedly installed on the left side of the heating tank 1, the liquid inlet pipe 502 is fixedly connected with the water inlet of the pump body 501, the liquid inlet pipe 502 is used for connecting a wine tank, the liquid outlet pipe 503 is fixedly connected with the water outlet of the pump body 501, the connecting pipe 504 is fixedly connected with the liquid outlet pipe 503, the spray pipe 505 is fixedly connected with the connecting pipe 504, the spray pipe 505 is fixedly connected with the heating tank 1, the first spray head 506 is fixedly connected with the other end of the spray pipe 505, the first spray head 506 is arranged in the heating tank 1, the first motor 507 is fixedly connected with the bottom of the heating tank 1, the rotating shaft 508 is fixedly connected with the output end of the first motor 507, the rotating shaft 508 is rotationally connected with the heating tank 1, the stirring blades 509 are fixedly connected with the rotating shaft 508, the outer wall of the rotating shaft 508 is fixedly connected with a horizontal rod 510, the top of the horizontal rod 510 is fixedly connected with a vertical rod 511, the horizontal rod 510 and the vertical rod 511 are both provided with three, the three horizontal rods 510 and the three vertical rods 511 are arranged in a ring shape at equal intervals, a plurality of turbulence holes 512 are formed in the horizontal rod 510 and the vertical rod 511, the plurality of turbulence holes 512 are different in diameter and irregularly arranged, the spray pipe 505 and the first spray head 506 are both provided with five, the five spray pipes 505 and the five first spray heads 506 are arranged at equal intervals, a scraping mechanism 7 is arranged on the collection tank 4, the liquid inlet pipe 502 is connected with the wine tank, then the pump body 501 is started, the original liquor in the wine tank sequentially passes through the liquid inlet pipe 502, the liquid outlet pipe 503 and the connecting pipe 504, passes through the five spray pipes 505 and is finally sprayed out of the five first spray heads 506, the purpose is to make the liquor enter the heating tank 1 from different positions, improve the area of contact with heat, simultaneously start the first motor 507, the output end of the first motor 507 drives the rotating shaft 508 to rotate, the rotating shaft 508 drives the stirring blades 509 to rotate, the original liquor is stirred, meanwhile the horizontal rod 510 rotates and drives the vertical rod 511 to rotate, meanwhile the original liquor passes through the turbulence holes 512, auxiliary stirring and turbulence, further improve the heat exchange area of the original liquor and heat, improve the evaporation efficiency.

[0062] Please refer to Figures 1-8The scraping mechanism 7 comprises a second motor 701, a lead screw 702, a limiting rod 703, a sliding block 704, a connecting rod 705 and a scraper 706; the second motor 701 is fixed on the top of the collecting tank 4; the lead screw 702 is fixed on the output end of the second motor 701, and the lead screw 702 is rotatably connected with the collecting tank 4 through a bearing; the limiting rod 703 is fixedly connected between the inner walls of the collecting tank 4; the sliding block 704 is threadedly connected with the lead screw 702, and the sliding block 704 is slidably connected with the limiting rod 703; the connecting rod 705 is fixedly connected with the outer wall of the sliding block 704; the inner wall of the scraper 706 is fixedly connected with the outer side of the connecting rod 705; by starting the second motor 701, the output end of the second motor 701 drives the lead screw 702 to rotate, under the limitation of the limiting rod 703, the sliding block 704 slides downward, the sliding block 704 drives the scraper 706 to descend through the connecting rod 705, the scraper 706 scrapes the water droplets in the collecting tank 4, so that the wine is concentrated in the collecting tank 4, and the wine yield is improved; the collecting tank 4 is a transparent tank body, and the operator can control the second motor 701 to reverse by observing the distance between the scraper 706 and the liquid level of the wine, so that the scraper 706 rises.

[0063] Please refer to Figures 1-8 The inner wall of the collecting tank 4 is provided with a first receiving groove 707, a second receiving groove 708 and a third receiving groove 709, the second receiving groove 708 is provided with two, the two second receiving grooves 708 are in communication with the first receiving groove 707 and the third receiving groove 709, and the first receiving groove 707, the second receiving groove 708 and the third receiving groove 709 are respectively matched with the sliding block 704, the connecting rod 705 and the scraper 706; by arranging the first receiving groove 707, the second receiving groove 708 and the third receiving groove 709, when scraping is not performed, the sliding block 704, the connecting rod 705 and the scraper 706 are respectively arranged in the first receiving groove 707, the second receiving groove 708 and the third receiving groove 709, so that the water droplets formed by the wine can only be attached to the bottom of the sliding block 704, the connecting rod 705 and the scraper 706.

[0064] Please refer to Figures 1-6 The bottom of the heating tank 1 is fixedly connected with a base 8, the distillation column 2, the condenser 3 and the collecting tank 4 are all fixedly connected on the top of the base 8, the base 8 is fixedly connected with a support 9 between the pump body 501, the gas outlet of the heating tank 1 and the gas inlet of the distillation column 2 are fixedly connected with a first conveying pipe 10, the gas outlet of the distillation column 2 and the input end of the condenser 3 are fixedly connected with a second conveying pipe 11, the output end of the condenser 3 and the liquid inlet of the collecting tank 4 are fixedly connected with a third conveying pipe 12, the liquid outlet of the collecting tank 4 is fixedly connected with a fourth conveying pipe 14, and the third conveying pipe 12 and the fourth conveying pipe 14 are respectively provided with a first one-way valve 13 and a second one-way valve 15.

[0065] By adopting the technical scheme, after the raw wine is heated and evaporated in the heating tank 1, the steam moves from bottom to top, enters into the distillation tower 2 through the first conveying pipe 10, falls on the bottom plate of the distillation tower 2, and after being fractionated in the distillation tower 2, most of the fusel oil is removed, enters into the condenser 3 through the second conveying pipe 11, is liquefied by the condenser 3, enters into the collecting tank 4 through the third conveying pipe 12, and the wine in the collecting tank 4 is introduced into the storage device for storage by opening the second one-way valve 15, and the first one-way valve 13 is arranged to avoid the wine from flowing back to the condenser 3.

[0066] Please refer to Figures 1-5 The water inlet of the distillation tower 2 is fixedly connected with a water inlet pipe 16, one end of the water inlet pipe 16 is used for connecting an external water pipe, a drain valve is arranged on the distillation tower 2, the other end of the water inlet pipe 16 is fixedly connected with a second spray head 17, and the inner wall of the distillation tower 2 is fixedly connected with fractionating plates 18, the fractionating plates 18 are provided in six, and the six fractionating plates 18 are equidistantly arranged.

[0067] By adopting the technical scheme, water is introduced from the water inlet pipe 16 and sprayed out from the second spray head 17, when the water meets the rising steam, since the boiling point of the fusel oil is higher than that of the alcohol, the fusel oil is gradually separated on different fractionating plates 18 after being contacted with the water, and the steam formed by the alcohol gradually rises and is discharged through the second conveying pipe 11.

[0068] In order to better understand the present application, the following will be described in detail to reduce the rectification device and method for fusel oil in white wine, and the rectification method for reducing the fusel oil in white wine comprises the following steps:

[0069] S1: heating and evaporating: first, connect the liquid inlet pipe 502 with the wine tank, start the pump body 501 to pump the wine into the heating tank 1, spray out through the plurality of first spray heads 506, heat and stir through the heater 6, so that the temperature reaches the evaporation temperature;

[0070] S2: distillation: the evaporated wine enters the bottom of the distillation tower 2 through the first conveying pipe 10, water is sprayed out from the second spray head 17 through the water inlet pipe 16 and falls in the tower, and the wine gas rises in the tower, in the tower, the steam and the falling liquid contact with each other, so that the mass transfer and heat transfer are realized, since the boiling point of the fusel oil is higher than that of the alcohol, the fusel oil is gradually separated on different fractionating plates 18 after being contacted with the water, and most of the fusel oil is removed;

[0071] S3: condensation and collection: after the steam passes through the condenser 3, it is liquefied into liquid, enters into the collecting tank 4 through the third conveying pipe 12, and is collected.

[0072] Specifically, the working process or working principle of the rectification device and rectification method for reducing fusel oil in liquor: connect the liquid inlet pipe 502 to the wine tank, then start the pump body 501, the original liquor in the wine tank passes through the liquid inlet pipe 502, the liquid outlet pipe 503 and the connecting pipe 504 in turn, and finally is sprayed out by the five first spray heads 506 through the five spray pipes 505, the purpose is to make the liquor enter the heating tank 1 from different positions to increase the contact area with heat, at the same time, start the first motor 507, the output end of the first motor 507 drives the rotating shaft 508 to rotate, the rotating shaft 508 drives the stirring blade 509 to rotate, and the original liquor is stirred, at the same time, the horizontal rod 510 rotates and drives the vertical rod 511 to rotate, at the same time, the original liquor will pass through the spoiler hole 512 to assist stirring and flow disturbance, after the original liquor is heated and evaporated in the heating tank 1, the steam moves from bottom to top, passes through the first conveying pipe 10 into the distillation column 2, the water is introduced from the water inlet pipe 16 and sprayed out from the second spray head 17, when the water meets the rising steam, the fusel oil is gradually separated on the different fractionating plates 18 after contacting with water because the boiling point of fusel oil is higher than that of alcohol, while the alcohol vapor gradually rises and enters the condenser 3 through the second conveying pipe 11, the condenser 3 liquefies the steam, and the third conveying pipe 12 enters the collection tank 4, opens the second one-way valve 15 to introduce the liquor in the collection tank 4 into the storage device for preservation, sets the first one-way valve 13 to avoid backflow of liquor into the condenser 3, starts the second motor 701, the output end of the second motor 701 drives the lead screw 702 to rotate, under the limitation of the limiting rod 703, the sliding block 704 slides downward, the sliding block 704 drives the scraper 706 to descend through the connecting rod 705, the scraper 706 scrapes off the water droplets in the collection tank 4, so that the liquor is concentrated in the collection tank 4, and the liquor yield is improved, the collection tank 4 is a transparent tank body, the operator can control the second motor 701 to reverse by observing the distance between the scraper 706 and the liquor level, so that the scraper 706 rises.

Claims

1. A rectifying device for reducing fusel oil in white spirit, comprising: a heating tank (1), a distillation column (2), a condenser (3) and a collection tank (4), which are arranged from left to right, and a heater (6) is fixedly installed on the inner wall of the heating tank (1); an acceleration mechanism (5) arranged on the heating tank (1), which comprises: a pump body (501) fixedly installed on the left side of the heating tank (1); a liquid inlet pipe (502) fixedly connected with the water inlet of the pump body (501), which is used for connecting a wine tank; a liquid outlet pipe (503) fixedly connected with the water outlet of the pump body (501); a connecting pipe (504) fixedly connected with the liquid outlet pipe (503); a spray pipe (505) fixedly connected with the connecting pipe (504) and the heating tank (1); a first spray head (506) fixedly connected with the other end of the spray pipe (505) and arranged in the heating tank (1); a first motor (507) fixedly connected to the bottom of the heating tank (1); a rotating shaft (508) fixedly connected to the output end of the first motor (507) and rotationally connected with the heating tank (1), the outer wall of the rotating shaft (508) is fixedly connected with a horizontal rod (510), the top of the horizontal rod (510) is fixedly connected with a vertical rod (511), the horizontal rod (510) and the vertical rod (511) are both provided with three, the three horizontal rods (510) and the three vertical rods (511) are arranged in a ring shape at equal intervals, a plurality of turbulence holes (512) are formed in the horizontal rod (510) and the vertical rod (511), the plurality of turbulence holes (512) are different in diameter and irregularly arranged, the spray pipe (505) and the first spray head (506) are both provided with five, and the five spray pipes (505) and the five first spray heads (506) are arranged at equal intervals; a stirring blade (509) fixedly connected with the rotating shaft (508); a scraping mechanism (7) arranged on the collection tank (4).

2. The rectification device for reducing fusel oil in Baijiu according to claim 1, Characterized in that: the scraping mechanism (7) comprises: a second motor (701) fixed to the top of the collection tank (4); a lead screw (702) fixed to the output end of the second motor (701) and rotationally connected with the collection tank (4) through a bearing; a limiting rod (703) fixedly connected between the inner walls of the collection tank (4); a sliding block (704) threadedly connected with the lead screw (702) and slidingly connected with the limiting rod (703). A connecting rod (705) is fixedly connected with the outer wall of the sliding block (704); A scraper (706) is fixedly connected with the outer side of the connecting rod (705).

3. The rectification device for reducing fusel oil in Baijiu according to claim 2, characterized in that, The inner wall of the collecting tank (4) is provided with a first receiving groove (707), a second receiving groove (708) and a third receiving groove (709), the second receiving groove (708) is provided with two, the two second receiving grooves (708) are in communication with the first receiving groove (707) and the third receiving groove (709), and the first receiving groove (707), the second receiving groove (708) and the third receiving groove (709) are matched with the sliding block (704), the connecting rod (705) and the scraper (706) respectively.

4. The rectification device for reducing fusel oil in Baijiu according to claim 3, characterized in that, The bottom of the heating tank (1) is fixedly connected with a base (8), the distillation column (2), the condenser (3) and the collecting tank (4) are all fixedly connected on the top of the base (8), and the base (8) is fixedly connected with a support (9) between the pump body (501).

5. The rectification device for reducing fusel oil in Baijiu according to claim 4, characterized in that, The gas outlet of the heating tank (1) and the gas inlet of the distillation column (2) are fixedly connected with a first conveying pipe (10), and the gas outlet of the distillation column (2) and the input end of the condenser (3) are fixedly connected with a second conveying pipe (11).

6. The rectifying device for reducing fusel oil in Baijiu according to claim 5, characterized in that, The output end of the condenser (3) and the liquid inlet of the collecting tank (4) are fixedly connected with a third conveying pipe (12), the liquid outlet of the collecting tank (4) is fixedly connected with a fourth conveying pipe (14), and the third conveying pipe (12) and the fourth conveying pipe (14) are respectively provided with a first one-way valve (13) and a second one-way valve (15).

7. The rectification device for reducing fusel oil in Baijiu according to claim 6, characterized in that, The water inlet of the distillation column (2) is fixedly connected with a water inlet pipe (16), one end of the water inlet pipe (16) is used for connecting an external water pipe, a drain valve is arranged on the distillation column (2), the other end of the water inlet pipe (16) is fixedly connected with a second nozzle (17), and the inner wall of the distillation column (2) is fixedly connected with a fractionating plate (18), the fractionating plate (18) is provided with six, and the six fractionating plates (18) are equidistantly arranged.

8. A rectification method for reducing fusel oil in liquor, which is suitable for the rectification device for reducing fusel oil in liquor according to any one of claims 1-7, characterized in that: The steps of the method are as follows S1: heating and evaporation: first, connect the liquid inlet pipe (502) with the wine tank, start the pump body (501) to pump the wine into the heating tank (1), spray out through a plurality of first nozzles (506), heat through the heater (6) and stir, so that the temperature reaches the evaporation temperature; S2: distillation: the evaporated wine enters the bottom of the distillation column (2) through the first conveying pipe (10), the water is sprayed out from the second nozzle (17) through the water inlet pipe (16) and falls from the column, the wine gas rises in the column, in the column, the steam and the falling liquid contact each other, so as to realize mass transfer and heat transfer, and because the boiling point of fusel oil is higher than that of alcohol, after contacting with water, the fusel oil is gradually separated on different fractionating plates (18), and most of the fusel oil is removed; S3: condensation and collection: after the steam passes through the condenser (3), it is liquefied into liquid, enters the collecting tank (4) through the third conveying pipe (12), and is collected.

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