Device for removing sulfur dioxide in grape wine and method for removing sulfur dioxide in grape wine by using device

Abstract

The invention belongs to the technical field of desulfurization, and particularly relates to a device for removing sulfur dioxide in grape wine and a method for removing sulfur dioxide in grape wine by using the device. According to the device, sulfur dioxide can be removed through nitrogen blowing, and flavor substances in wine are prevented from being oxidized. And the nitrogen is insoluble in the grape wine and has no residue, no new substance is introduced, the new national standard is met, and the nitrogen is safe and environment-friendly. And the nitrogen blowing method does not need to add manpower, continuous desulfurization can be realized, and the production efficiency is greatly improved. The nitrogen blowing method makes full use of heat of mash after distillation, the resource utilization rate is increased, and energy conservation and emission reduction are achieved.

Description

Technical Field

[0001] The invention belongs to the technical field of desulfurization, and particularly relates to a device for removing sulfur dioxide from wine and a method for removing sulfur dioxide from wine using the device. Background Art

[0002] Before distillation, wine stored in tanks must be freed of sulfur dioxide to avoid affecting the quality of the distilled wine and the distillation equipment. Currently, the method for removing sulfur dioxide from wine is to use hydrogen peroxide, using the redox reaction (SO2 + H2O2 = H2SO4) to oxidize the sulfur dioxide into sulfuric acid. However, this method will also oxidize some flavor substances in the wine, affecting the wine quality. In addition, the redox reaction method is not thorough in desulfurization, and the residual sulfur dioxide in the wine is high. Secondly, with the release of GB2760-2024, hydrogen peroxide can no longer be used in the wine industry. Therefore, there is currently no process method suitable for wine desulfurization. Summary of the Invention

[0003] The object of the present invention is to provide a device for removing sulfur dioxide from wine and a method for removing sulfur dioxide from wine using the device. The device for removing sulfur dioxide from wine provided by the present invention can remove sulfur dioxide from wine with high efficiency while ensuring that flavor substances in the wine are not oxidized.

[0004] In order to achieve the above object, the present invention provides the following technical solutions:

[0005] The present invention provides a device for removing sulfur dioxide from wine, comprising a heating kettle 1;

[0006] A condensation system 2 is connected to the heating kettle 1; the condensation system 2 includes a first condenser 2-1 and a second condenser 2-2 connected in series;

[0007] A heat exchanger 3 in communication with the first condenser 2-1; the heat exchanger 3 in communication with the heating kettle 1;

[0008] The gas-water separator 4 is connected to the second condenser 2-2.

[0009] Preferably, a first raw material inlet 2-1-1 is provided on the bottom side of the first condenser 2-1;

[0010] A refrigerant inlet 2-2-1 is provided on the bottom side of the second condenser 2-2; a refrigerant outlet 2-2-2 is provided on the top side of the second condenser 2-2.

[0011] Preferably, a nitrogen inlet 1-2 is provided on the top of the heating kettle 1;

[0012] The bottom of the heating kettle 1 is provided with discharge ports 1 to 4 and condensed water outlets 1 to 5;

[0013] A nitrogen inlet 1-2 is provided on the top of the heating kettle 1;

[0014] A packing layer is provided inside the middle of the heating kettle 1 .

[0015] Preferably, the heat exchanger 3 is a plate heat exchanger; and the gas-water separator 4 is a cyclone gas-water separator.

[0016] Preferably, the packing layer is a mesh structure; the packing in the packing layer is a structured packing; and the packing is a stainless steel packing.

[0017] Preferably, the heating kettle 1 is an automatic temperature-controlled heating kettle.

[0018] Preferably, the refrigerant is ethylene glycol.

[0019] The present invention also provides a method for removing sulfur dioxide from wine using the device described in the above technical solution, comprising the following steps:

[0020] Start the condenser heat exchange, the heating kettle heating and the heat exchanger heat exchange;

[0021] Passing the wine from the raw material inlet into the first condenser for first heat exchange to obtain a first heat-exchanged raw material;

[0022] Passing the heat-exchanged raw material into a heat exchanger for a second heat exchange with the distilled mash to obtain a second heat-exchanged raw material; passing the second heat-exchanged raw material into a heating kettle for heating treatment while blowing nitrogen, heating treatment until the wine boils, and continuing nitrogen blowing for 15 to 30 minutes to obtain wine with sulfur dioxide removed and sulfur dioxide;

[0023] Nitrogen carrying alcohol and sulfur dioxide is condensed in the first condenser and the second condenser, and then enters the gas-water separator for gas-liquid separation to obtain a mixed gas and liquid alcohol respectively; the mixed gas includes nitrogen and sulfur dioxide.

[0024] Preferably, the temperature of the raw material after the first heat exchange is 30-35°C; the temperature of the raw material after the second heat exchange is 60°C.

[0025] Preferably, the feed flow rate of the wine is 2-4 kL / h.

[0026] The present invention provides a device for removing sulfur dioxide from wine, comprising a heating kettle 1; a condensation system 2 connected to the heating kettle 1; the condensation system 2 comprising a first condenser 2-1 and a second condenser 2-2 connected in series; a heat exchanger 3 connected to the first condenser 2-1; the heat exchanger 3 connected to the heating kettle 1; and a gas-water separator 4 connected to the second condenser 2-2. The device provided by the present invention can remove sulfur dioxide by nitrogen blowing, thereby preventing the oxidation of flavor substances in the wine. Nitrogen is insoluble in wine, leaves no residue, and does not introduce new substances, thus complying with the new national standards. Nitrogen is also safe and environmentally friendly. The nitrogen blowing method does not require additional labor and can achieve continuous desulfurization, greatly improving production efficiency. The nitrogen blowing method fully utilizes the heat of the mash after distillation, improves resource utilization, and saves energy and reduces emissions. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] 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. 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.

[0028] Figure 1 The present invention provides a device for removing sulfur dioxide from wine. DETAILED DESCRIPTION

[0029] The present invention provides a device for removing sulfur dioxide from wine, comprising a heating kettle 1;

[0030] A condensation system 2 is connected to the heating kettle 1; the condensation system 2 includes a first condenser 2-1 and a second condenser 2-2 connected in series;

[0031] A heat exchanger 3 in communication with the first condenser 2-1; the heat exchanger 3 in communication with the heating kettle 1;

[0032] The gas-water separator 4 is connected to the second condenser 2-2.

[0033] like Figure 1 As shown, the device for removing sulfur dioxide from wine provided by the present invention includes a heating kettle 1.

[0034] As an embodiment of the present invention, the heating kettle 1 is preferably a jacketed heating kettle; a nitrogen inlet 1-2 is provided on the top of the heating kettle 1; a nitrogen metal tube is passed from the nitrogen inlet into the middle of the wine in the heating kettle to avoid local purging, ensure uniform dispersion of nitrogen, and avoid "short circuit" phenomenon; the micropore diameter of the aeration head of the nitrogen metal tube is preferably 1 mm; as an embodiment of the present invention, a manhole 1-3 is preferably provided on the top of the heating kettle 1 to facilitate packing replacement and internal inspection.

[0035] As an embodiment of the present invention, a steam inlet 1-6 is provided in the middle of the heating kettle 1 to provide a heat source for the heating kettle 1. As an embodiment of the present invention, the steam inlet 1-6 is connected to an external steam source (such as saturated steam) to indirectly heat the raw materials through the jacket.

[0036] As an embodiment of the present invention, a discharge port 1-4 and a condensed water outlet 1-5 are provided at the bottom of the heating kettle 1; in the present invention, the wine liquid from which sulfur dioxide is removed flows out through the discharge port 1-4, and the condensed water after steam heating is condensed in the jacket and discharged through the condensed water outlet 1-5 to maintain heating stability.

[0037] As an embodiment of the present invention, a packing layer is provided inside the middle part of the heating kettle 1; the packing in the packing layer is preferably a structured packing; the packing is preferably a stainless steel packing; the packing layer is a mesh structure, which can increase the gas-liquid contact area, enhance the heat transfer efficiency of the raw materials and the mass transfer efficiency between N2 and the raw materials, and improve the SO2 removal rate.

[0038] The device for removing sulfur dioxide from wine of the present invention comprises a condensation system 2 connected to a heating kettle 1; the condensation system 2 comprises a first condenser 2-1 and a second condenser 2-2 connected in series.

[0039] As one embodiment of the present invention, the first condenser 2-1 is provided with a first raw material inlet 2-1-1 on the bottom side and a first raw material outlet 2-1-2 on the top side. As another embodiment of the present invention, the second condenser 2-2 is provided with a refrigerant inlet 2-2-1 on the bottom side and a refrigerant outlet 2-2-2 on the top side. The refrigerant is preferably ethylene glycol. Both the first condenser 2-1 and the second condenser 2-2 are coil-wound condensers. In the present invention, the condensers implement countercurrent cooling to improve condensation efficiency.

[0040] The device for removing sulfur dioxide from wine of the present invention includes a heat exchanger 3 connected to the first condenser 2-1; the heat exchanger 3 is connected to the heating kettle 1.

[0041] As an embodiment of the present invention, the heat exchanger 3 is a plate heat exchanger; a cold medium inlet 3-1 and a hot medium outlet 3-2 are provided at the top of the heat exchanger 3; a hot medium inlet 3-3 and a second raw material outlet 3-4 are provided at the bottom of the heat exchanger 3; the heat exchanger 3 is connected to the first raw material outlet 2-1-2 of the first condenser 2-1 through the top cold medium inlet 3-1; the heat exchanger 3 is connected to the heating kettle 1 through the second raw material outlet 3-4; the heat exchanger 3 adopts countercurrent heat exchange to improve heat exchange efficiency.

[0042] The device for removing sulfur dioxide from wine of the present invention includes a gas-water separator 4 connected to the second condenser 2-2, and the gas-water separator 4 is a cyclone gas-water separator; the gas-water separator 4 is provided with a gas outlet 4-1 at the top and a liquid outlet 4-2 at the bottom.

[0043] The present invention also provides a method for removing sulfur dioxide from wine using the device described in the above technical solution, comprising the following steps:

[0044] Start the condenser heat exchange, the heating kettle heating and the heat exchanger heat exchange;

[0045] Passing the wine from the raw material inlet into the first condenser for first heat exchange to obtain a first heat-exchanged raw material;

[0046] Passing the heat-exchanged raw material into a heat exchanger for a second heat exchange with the distilled mash to obtain a second heat-exchanged raw material; passing the second heat-exchanged raw material into a heating kettle for heating treatment while nitrogen blowing to obtain wine with sulfur dioxide removed and sulfur dioxide;

[0047] Nitrogen carrying alcohol and sulfur dioxide is condensed in the first condenser and the second condenser, and then enters the gas-water separator for gas-liquid separation to obtain a mixed gas and liquid alcohol respectively; the mixed gas includes nitrogen and sulfur dioxide.

[0048] In the present invention, the method for removing sulfur dioxide from wine preferably further comprises heating the wine solely in a heating kettle and simultaneously nitrogen purging the wine before heat exchange in the condenser and heat exchanger (i.e., when the wine is first introduced), thereby obtaining the wine from which the sulfur dioxide has been removed. In the present invention, the wine from which the sulfur dioxide has been removed is subsequently distilled to obtain a mash; the mash can serve as the heat medium for the heat exchanger, and its use as a heat source can also save energy and improve economic efficiency.

[0049] The present invention starts the heat exchange of the condenser, the heating kettle and the heat exchanger; the wine enters the first condenser from the raw material inlet for the first heat exchange, and obtains the raw material after the first heat exchange.

[0050] As an embodiment of the present invention, the flow rate of the wine is preferably 2 to 4 kL / h. As an embodiment of the present invention, the condensation temperature of the first condenser is preferably 15 to 20°C; As an embodiment of the present invention, the temperature of the raw material after the first heat exchange is preferably 30 to 35°C.

[0051] After obtaining the first heat-exchanged raw material, the present invention passes the heat-exchanged raw material into the heat exchanger 3 for a second heat exchange with the mash to obtain a second heat-exchanged raw material; the second heat-exchanged raw material is passed into the heating kettle for heating treatment and nitrogen blowing at the same time, and after the heating treatment until the wine boils, the nitrogen blowing is continued for 15 to 30 minutes to obtain wine with sulfur dioxide removed and sulfur dioxide; the nitrogen carrying alcohol and sulfur dioxide is condensed through the first condenser and the second condenser, and then enters the gas-water separator for gas-liquid separation to obtain a mixed gas and liquid alcohol respectively; the mixed gas includes nitrogen and sulfur dioxide.

[0052] In the present invention, the first condenser can preliminarily cool the alcohol in the steam obtained after heating in the heating kettle, ensuring the maximum recovery of alcohol (reducing the alcohol content in the exhaust gas and improving economic efficiency), while preheating the raw materials, saving energy and reducing consumption. The second condenser can further condense the alcohol in the steam obtained after heating in the heating kettle (steam from bottom to top, cooling medium from top to bottom, reverse heat exchange), and prepare for subsequent gas-liquid separation.

[0053] As an embodiment of the present invention, the temperature of the raw material after the second heat exchange is 60°C.

[0054] In one embodiment of the present invention, nitrogen carrying trace amounts of alcohol and sulfur dioxide enters the gas-water separator and moves in a downward, swirling flow. Due to the reduced velocity of the swirling nitrogen, the alcohol is separated and accumulated on the inner wall of the gas-water separator under the action of the existing centrifugal force. The dry nitrogen, carrying sulfur dioxide, is then discharged through an automatic valve and discharged from the separator's gas outlet. The gas-water separator has a high alcohol recovery efficiency, and when the gas velocity drops below 13.8 m / s, over 99% of the liquid alcohol can be recovered.

[0055] This invention uses nitrogen blowing to remove sulfur dioxide from wine, preventing oxidation of flavor compounds. Furthermore, nitrogen is insoluble in wine, leaving no residue and introducing no new substances, complying with new national standards. Furthermore, nitrogen is safe and environmentally friendly. Nitrogen blowing requires no additional labor and allows for continuous desulfurization, significantly improving production efficiency. It also fully utilizes the heat of the mash after distillation, improving resource utilization and reducing energy consumption and emissions.

[0056] In order to further illustrate the present invention, the scheme of the present invention is described in detail below with reference to the accompanying drawings and embodiments, but they should not be understood as limiting the scope of protection of the present invention.

[0057] Example 1

[0058] like Figure 1 As shown, the device for removing sulfur dioxide from wine includes a jacketed heating kettle 1, a nitrogen inlet 1-2 and a manhole 1-3 are provided on the top, discharge ports 1-4 and condensed water outlets 1-5 are provided on the bottom, and a steam inlet 1-6 is provided in the middle;

[0059] A first condenser 2-1 is connected to the jacketed heating kettle 1, and a second condenser 2-2 is connected in series with the first condenser 2-1. The first condenser is provided with a first raw material inlet 2-1-1 on the bottom side and a first raw material outlet 2-1-2 on the top side;

[0060] The plate heat exchanger 3 connected to the first condenser has a cold medium inlet 3-1 and a hot medium outlet 3-2 at its top; a hot medium inlet 3-3 and a second raw material outlet 3-4 at its bottom; the cold medium inlet 3-1 at the top is connected to the first raw material outlet 2-1-2 of the first condenser 2-1; and the second raw material outlet 3-4 is connected to the jacketed heating kettle 1;

[0061] The cyclone type gas-water separator 4 communicated with the second condenser 2-2 is provided with a gas outlet 4-1 at the top and a liquid outlet 4-2 at the bottom.

[0062] Desulfurization method:

[0063] Start the condenser heat exchange, the heating kettle heating and the heat exchanger heat exchange;

[0064] Wine-1 is introduced from the raw material inlet, passes through the first condenser and heat exchanger, and enters the heating kettle for heating. The heated wine vapor enters the first condenser (condensation temperature is 20°C) for the first heat exchange, obtaining the first heat-exchanged raw material at a temperature of 35°C;

[0065] The heat-exchanged raw material was passed through a heat exchanger for a second heat exchange with mash (the mash was obtained by distilling wine from which sulfur dioxide had been removed, and the temperature of the mash was 95° C.), thereby obtaining a second heat-exchanged raw material having a temperature of 60° C.; the second heat-exchanged raw material was passed through a heating kettle for heating treatment while nitrogen blowing; after the raw material boiled, nitrogen blowing was continued for another 30 minutes (the wine after nitrogen blowing was tested every 5 minutes, and the residual sulfur dioxide results are shown in Table 1), thereby obtaining wine from which sulfur dioxide had been removed and sulfur dioxide;

[0066] Nitrogen carrying alcohol and sulfur dioxide is condensed in the first condenser and the second condenser, and then enters the cyclone gas-water separator for gas-liquid separation to obtain a mixed gas and liquid alcohol respectively; the mixed gas is nitrogen and sulfur dioxide.

[0067] Note: Before the wine circulates, that is, when it first enters the system, it is directly heated and nitrogen-blown in the heating kettle to complete the circulation process.

[0068] Example 2

[0069] The only difference from Example 1 is that Wine-1 is replaced by Wine-2.

[0070] Table 1 Effect of nitrogen desulfurization time on results

[0071]

[0072] Example 3

[0073] The difference from Example 1 is that the condensation temperature is 10°C.

[0074] Example 4

[0075] The difference from Example 1 is that the condensation temperature is -5°C.

[0076] The effect of condensation temperature on the alcohol content in the wine in Examples 1 to 3 was tested according to GB15038, as shown in Table 2.

[0077] Table 2 Effect of condensation temperature on alcohol content of wine

[0078]

[0079] Although the above embodiment provides a detailed description of the present invention, it is only a part of the embodiments of the present invention, not all of the embodiments. Other embodiments can be obtained based on this embodiment without creativity, and these embodiments all fall within the scope of protection of the present invention.

Claims

1. A device for removing sulfur dioxide from wine, comprising a heating kettle (1); A condensation system (2) communicated with the heating kettle (1); the condensation system (2) comprises a first condenser (2-1) and a second condenser (2-2) connected in series; a heat exchanger (3) in communication with the first condenser (2-1); the heat exchanger (3) in communication with the heating kettle (1); A gas-water separator (4) is connected to the second condenser (2-2).

2. The device according to claim 1, wherein The bottom side of the first condenser (2-1) is provided with a first raw material inlet (2-1-1); the top side is provided with a first raw material outlet (2-1-2); A refrigerant inlet (2-2-1) is provided on the bottom side of the second condenser (2-2); A refrigerant outlet (2-2-2) is provided on the top side of the second condenser (2-2).

3. The device according to claim 1, wherein The top of the heating kettle (1) is provided with a nitrogen inlet (1-2); The bottom of the heating kettle (1) is provided with a discharge port (1-4) and a condensed water outlet (1-5); and the middle is provided with a steam inlet (1-6).

4. The device according to claim 1, wherein The heat exchanger (3) is a plate-type heat exchanger; the gas-water separator (4) is a cyclone-type gas-water separator.

5. The device according to claim 3, wherein A packing layer is provided inside the middle of the heating kettle (1); the packing layer is a mesh structure; the packing in the packing layer is a structured packing; and the packing is a stainless steel packing.

6. The device according to claim 1, wherein The heating kettle (1) is an automatic temperature-controlled heating kettle.

7. The device according to claim 2, wherein The refrigerant is ethylene glycol.

8. A method for removing sulfur dioxide from wine using the device according to any one of claims 1 to 7, characterized in that: The following steps are involved: Start the condenser heat exchange, the heating kettle heating and the heat exchanger heat exchange; Passing the wine from the raw material inlet into the first condenser for first heat exchange to obtain a first heat-exchanged raw material; Passing the heat-exchanged raw material into a heat exchanger for a second heat exchange with the distilled mash to obtain a second heat-exchanged raw material; passing the second heat-exchanged raw material into a heating kettle for heating treatment while blowing nitrogen, heating treatment until the wine boils, and continuing nitrogen blowing for 15 to 30 minutes to obtain wine with sulfur dioxide removed and sulfur dioxide; Nitrogen carrying alcohol and sulfur dioxide is condensed in the first condenser and the second condenser, and then enters the gas-water separator for gas-liquid separation to obtain a mixed gas and liquid alcohol respectively; the mixed gas includes nitrogen and sulfur dioxide.

9. The method according to claim 8, wherein The temperature of the raw material after the first heat exchange is 30-35°C; the temperature of the raw material after the second heat exchange is 60°C.

10. The method according to claim 8, wherein The feed flow rate of the wine is 2-4 kL / h.

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