Distilled liquor dealcoholization device and process thereof

Abstract

The invention discloses a distilled liquor dealcoholization device and a process thereof, the distilled liquor dealcoholization device comprises a heat exchange tank, a cooler and a water system for supplying cold and hot water to the heat exchange tank and the cooler, a coil pipe is arranged in the heat exchange tank, and a recovery structure is arranged on the heat exchange tank. And a top pipe communicated with the cooler is arranged on one side of the recovery structure. According to the method, the distilled liquor is dealcoholized in a pure physical mode, and the defect that acetaldehyde and methanol cannot be effectively removed from the existing distilled liquor is overcome through stepped temperature control.

Description

Technical Field

[0001] The present invention relates to the technical field of distilled liquor preparation, in particular to a distilled liquor dealcoholization device and a process thereof. Background Art

[0002] Traditional distilled liquor dealcoholization processes mostly rely on long-term storage for natural volatilization or chemical additive treatment, which has the following problems:

[0003] The natural aging cycle is long (several years) and cannot meet modern production needs;

[0004] Residual risks from chemical treatments may introduce new hazardous substances;

[0005] The dealcoholization efficiency is low, and the azeotropic properties of ethanol and methanol make selective separation difficult;

[0006] In addition, existing physical dealcoholization technologies (such as vacuum distillation and membrane separation) have high equipment costs and destroy the original liquor structure during the separation and dealcoholization process.

[0007] Although the existing commonly used conversion method retains the structure of the original liquor, the converted methanol may produce a reversible reaction under certain conditions, which still poses a safety hazard, and there is still residual methanol. In addition, although the remaining methanol is within the national standard range, it does not rule out its harm to the human body. From the perspective of human food, safety comes first, and minimizing harm is the direction of food development. Summary of the Invention

[0008] In view of the above-mentioned technical deficiencies, the purpose of the present invention is to provide a distilled liquor dealcoholization device and process thereof to solve the dealcoholization defects of traditional distilled liquor.

[0009] In order to solve the above technical problems, the present invention adopts the following technical solution: the present invention provides a distilled liquor dealcoholization device, including a heat exchange tank, a cooler and a water system for supplying hot and cold water to the heat exchange tank and the cooler, a coil is provided in the heat exchange tank, a recovery structure is provided on the heat exchange tank, and a top pipe connected to the cooler is provided on one side of the recovery structure.

[0010] Preferably, the coil comprises inner and outer layers arranged longitudinally and spirally.

[0011] Preferably, the recovery structure includes a wind shield and an induced draft fan arranged on the heat exchange tank, the wind shield is provided with air holes, and the induced draft fan introduces the methanol and ethanol mixed vapor into the cooler through the top pipe.

[0012] Preferably, a plurality of arc-shaped condensing tubes are provided in the cooler, and a sieve plate is provided at the bottom of the condensing tubes.

[0013] Preferably, the cooler is provided with a purification structure, which includes a washing chamber and a water spray pipe.

[0014] The present invention also provides a process for dealcoholization of distilled liquor, comprising the following steps:

[0015] The distilled liquor is placed in a heat exchange tank for heating, and hot water is circulated through the coil to control the temperature of the liquor;

[0016] When the wine temperature reaches 64.7℃, remove the low-boiling-point substances;

[0017] When the temperature rises to 72°C, ethanol is controlled to start evaporating and methanol is taken out simultaneously;

[0018] Maintain the temperature above 78.5°C for 10 minutes to remove more than 60% of the methanol in the wine;

[0019] The wine was heated to 82°C and maintained at this temperature for 10 minutes to remove the remaining methanol.

[0020] Preferably, during the heating process, an external booster pump is used to push the wine to form a circular flow to achieve continuous and uniform stirring.

[0021] The beneficial effects of the present invention are as follows: the present invention uses a purely physical method to dealcoholize distilled liquor, and solves the defect that existing distilled liquor cannot effectively remove acetaldehyde and methanol through step temperature control. The fan sends air and ethanol and methanol gases into the cooler through the top pipe to avoid reflux that causes methanol to be unable to be cleared. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the following briefly introduces the drawings required for use in the embodiments or the description of the prior art. 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.

[0023] Figure 1 This is a schematic diagram of the overall structure provided by the present invention.

[0024] Figure 2 This is a schematic diagram of the internal structure of the heat exchange tank provided by the present invention.

[0025] Figure 3 A cross-sectional view of the cooler provided by the present invention.

[0026] Explanation of the reference numerals: 1-heat exchange tank; 11-coil; 2-cooler; 21-condenser; 22-sieve plate; 31-wind shield; 32-induced draft fan; 33-air vent; 34-top pipe; 41-washing chamber; 42-spray pipe. DETAILED DESCRIPTION

[0027] The following will clearly and completely describe the technical solutions in the embodiments of the present invention in conjunction with the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0028] Embodiment: The present invention provides a distilled liquor dealcoholization device, comprising a heat exchange tank 1 with an upper opening, a cooler 2, and a water system for supplying hot and cold water to the heat exchange tank 1 and the cooler 2.

[0029] The water system provided in this embodiment includes a hot water system and a cold water system. The cold water system consists of a water source and a pressure tank. The hot water system uses a boiler to provide hot water. This requires a temperature-controlled hot water boiler. The water temperature in the boiler can be controlled to meet the required temperature increase limit for the type of alcohol to prevent excessive ethanol evaporation caused by excessive temperatures. The hot and cold water systems can be interchangeably used. The pressure tank is used to store cold water and is supplied by a water pump. The boiler uses an electric heating pipe, a gas burner, or a steam heat exchanger. The boiler is equipped with a temperature sensor to monitor the water temperature in real time. Since the pressure tank and boiler are both prior art, they will not be described in detail.

[0030] The heat exchange tank 1 is used to store wine. A coil 11 is provided in the heat exchange tank 1. In this embodiment, the coil 11 includes two layers of longitudinally arranged inner and outer spirally upward corrosion-resistant water pipes, such as stainless steel pipes, and the inner and outer layers of the coil 11 each have 11 turns. The water in the coil 11 is drained by an external booster pump. The wine in the heat exchange tank 1 is driven by the external booster pump to enter from the top and exit from the bottom, pushing the wine to flow in a circular direction opposite to the flow direction of the water in the heat exchange tank 1, thereby improving the heat exchange efficiency.

[0031] The heat exchange tank 1 provided in this embodiment is provided with a temperature sensor for monitoring the temperature of the liquid in the tank. When in use, a temperature threshold is set in advance according to different types of wine. When the temperature exceeds the set threshold, heating can be stopped.

[0032] Since a certain amount of methanol and ethanol mixed gas will be generated during the dealcoholization process of wine, it needs to be recovered. Since the heat exchange tank 1 is open at the top, in order to avoid gas condensation and reflux, the present invention provides a recovery structure above the opening of the heat exchange tank 1. The specific recovery structure includes a wind shield 31 and an induced draft fan 32.

[0033] There are air holes 33 on the wind shield 31, which also facilitates observation of the situation inside the tank. One side of the induced draft fan 32 is connected to a top pipe 34, and the other end of the top pipe 34 is connected to the cooler 2. The top pipe 34 can be a conventional ventilation pipe. The aperture size and number of the air holes 33 are not limited and can be determined according to actual use.

[0034] The steam is drawn into the top pipe 34 by the induced draft fan 32 to prevent backflow. In this embodiment, the induced draft fan 32 is 180W, 1000 rpm, and the air volume is preferably 10 cubic meters per minute to prevent the wine recovery from being too difficult.

[0035] Air and ethanol and methanol gases are sent into the cooler 2 through the top pipe 34 by the fan 32 to avoid backflow that causes the methanol to be unable to be cleared.

[0036] The cooler 2 provided in this embodiment is water-cooled. The cooler 2 cools the methanol and ethanol mixture with a relatively high concentration at 70 degrees, which is sucked into the top pipe 34, and then the mixture is concentrated and dealcoholized again.

[0037] Cooler 2 is equipped with multiple curved condenser tubes 21, each with a sieve plate 22 at its base. These condenser tubes 21 form a lantern-like structure, with two lanterns separated by a partition. This increases the condensation process. According to the principles of atmospheric physics, the collision and mixing of the condensed gases causes the ethanol gas to liquefy and precipitate. This condensed gas is mostly air, unlike the condensed gas from distilled liquor, which is primarily water vapor and ethanol gas. The latter can be resolved using the laws of liquid physics. Condenser tubes 21 can be connected to the water system via a water pipe.

[0038] The cooler 2 provided in this embodiment is provided with a purification structure, and the purification structure includes a washing chamber 41 and a water spray pipe 42. The washing chamber 41 provided in this embodiment is a columnar structure. The water spray pipe 42 provided in this embodiment includes one longitudinal and two transverse water pipes. The transverse water pipes are inserted deep into the washing chamber 41. A nozzle can be provided at the end of the transverse water pipe to facilitate spraying the washing chamber 41. The bottom of the longitudinal water pipe can be connected to the water tank.

[0039] This embodiment also provides a process for dealcoholization of distilled liquor, comprising the following steps:

[0040] The distilled liquor is placed in a heat exchange tank for heating, and hot water is circulated through the coil to control the temperature of the liquor;

[0041] When the wine temperature reaches 64.7℃, remove low-boiling-point substances such as acetaldehyde;

[0042] When the temperature rises to 72°C, ethanol is controlled to start evaporating and methanol is taken out simultaneously;

[0043] Maintain the temperature above 78.5°C for 10 minutes to remove more than 60% of the methanol in the wine;

[0044] The wine was heated to 82°C and maintained at this temperature for 10 minutes to remove the remaining methanol.

[0045] During the heating process, an external booster pump is used to push the wine into a circular flow to achieve uniform stirring;

[0046] The volatile methanol-ethanol mixed gas is condensed and recovered through a water cooling system;

[0047] After dealcoholization is completed, the wine is subjected to adsorption filtration and pH adjustment.

[0048] During the heating process, the wine must be stirred continuously to ensure even heating within the container; uneven heating will result in incomplete dealcoholization. Once the desired temperature is reached, the heating speed should be kept steady. If the wine is thick, the dealcoholization temperature should be increased, otherwise dealcoholization will be incomplete. The dealcoholization temperature should be kept as low as possible; excessively high temperatures will further damage the original body of the wine. For example, for a 52-proof wine, significant volatilization will not occur until the temperature reaches 95 degrees Celsius, as the azeotropic point of this wine is 95 degrees Celsius. However, considering the balance of the wine, a methanol standard can be used to determine the dealcoholization temperature.

[0049] Considering that the structure of the wine changes after methanol is removed, and the sour and rancid taste of the soluble protein in the wine is stronger, it can be treated by adsorption filtration method to adjust the pH value, that is, a methanol-free wine product.

[0050] Dealcoholized liquor can be categorized as nationally compliant dealcoholized liquor, low-methanol liquor, and zero-methanol liquor. These are secondary processed products of the original liquor, which must be produced through solid-state fermentation with a fermentation period of at least 20 days. Products produced through alcohol, quick-drinking, or liquid fermentation methods lack maturity due to their shorter fermentation periods. This leads to high irritation and poor absorption, and they contain fewer aroma components, resulting in poor quality. While distillation can significantly improve the quality of low-quality liquor after methanol removal, the wine still suffers from a wine loss of approximately 30%. The overall ethanol loss during methanol dealcoholization can be controlled to less than 5%.

[0051] Obviously, those skilled in the art may make various changes and modifications to the present invention without departing from the spirit and scope of the present invention. Thus, if such changes and modifications fall within the scope of the claims and their equivalents, the present invention is intended to include such changes and modifications.

Claims

1. A distilled liquor dealcoholization device, characterized in that: The invention comprises a heat exchange tank (1), a cooler (2), and a water system for supplying hot and cold water to the heat exchange tank (1) and the cooler (2); a coil (11) is provided in the heat exchange tank (1); a recovery structure is provided on the heat exchange tank (1); and a top pipe (34) connected to the cooler (2) is provided on one side of the recovery structure.

2. The distilled liquor dealcoholization device according to claim 1, wherein The coil (11) comprises an inner layer and an outer layer which are longitudinally spirally arranged.

3. The distilled liquor dealcoholization device according to claim 1, characterized in that: The recovery structure comprises a wind shield (31) and an induced draft fan (32) arranged on the heat exchange tank (1); the wind shield (31) is provided with an air vent (33); and the induced draft fan (32) introduces methanol and ethanol mixed vapor into the cooler (2) through a top pipe (34).

4. The distilled liquor dealcoholization device according to claim 1, wherein: A plurality of arc-shaped condensing tubes (21) are provided in the cooler (2), and a sieve plate (22) is provided at the bottom of the condensing tubes (21).

5. The distilled liquor dealcoholization device according to claim 1, characterized in that: The cooler (2) is provided with a purification structure, which comprises a washing chamber (41) and a water spray pipe (42).

6. The process for dealcoholization of distilled liquor according to any of claims 1 to 5, wherein: The following steps are involved: The distilled liquor is placed in a heat exchange tank (1) for heating, and hot water is circulated through a coil (11) to control the temperature of the liquor; When the wine temperature reaches 64.7℃, remove the low-boiling-point substances; When the temperature rises to 72°C, ethanol is controlled to start evaporating and methanol is taken out simultaneously; Maintain the temperature above 78.5°C for 10 minutes to remove more than 60% of the methanol in the wine; The wine was heated to 82°C and maintained at this temperature for 10 minutes to remove the remaining methanol. During the heating process, an external booster pump is used to push the wine into a circular flow to achieve continuous and uniform stirring.

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