Separation and purification device and separation and purification method for wine brewing yellow water

Abstract

The invention provides a separation and purification device and a separation and purification method for wine-making yellow water. The separation and purification device comprises a low-pressure steam pipe network, a yellow water collecting tank, an alcohol separation tower, a yellow water dehydrating tower and a vacuum rectifying tower, wherein a tower top air outlet of the yellow water dehydrating tower provides heat energy for the yellow water dehydrating tower through a steam compressor. According to different boiling points of different substance groups in the wine-making yellow water, the beneficial flavor substances in the wine-making yellow water are separated and purified by adopting a mode of combining rectification and negative pressure rectification, so that the COD value of removed wastewater is greatly reduced, the treatment load of a sewage treatment station is reduced, and the treatment cost of the wine-making yellow water is reduced.

Description

Technical Field

[0001] The invention relates to the technical field of yellow water treatment for brewing wine, and in particular to a separation and purification device and a separation and purification method for yellow water for brewing wine. Background Art

[0002] The vitamins, phenolic compounds, small molecule peptides, amino acids and other substances contained in the raw materials for brewing, such as sorghum, rice, corn, glutinous rice and wheat, have antioxidant activity. These substances are dissolved in the water environment of the fermented grains and gradually settle at the bottom of the cellar. As the fermentation is completed, the liquid produced by the fermented grains after a long period of fermentation and the liquid collected at the bottom by the sedimentation of the water in the fermented grains themselves is the traditional yellow water for brewing.

[0003] There are many substances in the yellow water of brewing, mainly including organic acids, alcohols, aldehydes, esters and other aromatic substances, as well as amino acids, sugars, alcohol, humus, yeast autolysates, microbial cells and living cells. There are hundreds of species, and there are many beneficial substances, but they are limited by the scale of the winery and the differences in the composition of yellow water of different brewing processes. At present, there is a wide range of research on the resource recovery process of yellow water, mainly based on biological methods, but it basically remains in the experimental and theoretical research stage, and there are few industrial applications. At present, the mainstream practice is to send the yellow water of brewing to the sewage treatment device and adopt the traditional sewage treatment process combining anaerobic and aerobic treatment. However, the current treatment method has a high cost on the one hand, which can reach 30 to 60 yuan / ton without the cost of municipal sewage treatment for piped discharge; on the other hand, the sewage treatment has a heavy odor and also wastes many beneficial flavor substances in the yellow water of brewing. Summary of the invention

[0004] 1. Technical issues to be resolved

[0005] In view of the shortcomings of the prior art, the present invention provides a separation and purification device and separation and purification method for brewing yellow water, which adopts a three-tower combination in series to grade and purify the beneficial flavor substances in the brewing yellow water, greatly reduce the COD in the brewing yellow water, reduce the processing load of the sewage treatment plant, and solve the problems raised in the above background technology.

[0006] (II) Technical solution

[0007] To achieve the above objectives, the present invention is implemented through the following technical solutions:

[0008] According to a first aspect of the present invention, there is provided a separation and purification device for yellow water of brewing, comprising a low-pressure steam network, a yellow water collecting tank, an alcohol separation tower, a yellow water dehydration tower and a vacuum distillation tower, wherein the low-pressure steam network is connected to the alcohol separation tower and the vacuum distillation tower through pipelines respectively;

[0009] The yellow water from the wine-making workshop is transported to the yellow water collecting tank, which is connected to the middle feed port of the alcohol separation tower. The top gas outlet of the alcohol separation tower, the alcohol cooler, the alcohol collecting tank, the liquid outlet of the alcohol fractionation tower reflux pump and the alcohol storage tank are connected in sequence, and the bottom liquid outlet of the alcohol separation tower is connected to the middle feed port of the yellow water dehydration tower.

[0010] The top gas outlet of the yellow water dehydration tower provides heat energy to the yellow water dehydration tower through a steam compressor, the side line liquid outlet of the yellow water dehydration tower is connected to a condensate collection tank, the condensate collection tank is connected to a sewage treatment station, and the bottom liquid outlet of the yellow water dehydration tower is connected to a middle liquid inlet of the vacuum distillation tower;

[0011] The tower top gas outlet of the vacuum distillation tower, the tower top cooler, the light component collecting tank and the light component storage tank are connected in sequence, and the tower bottom liquid outlet of the vacuum distillation tower is connected to the heavy component storage tank.

[0012] Preferably, the yellow water collection tank is connected to the alcohol separation tower through an alcohol separation tower feed pump, and the gas outlet of the alcohol fractionation tower reflux pump is connected to the side line air inlet of the alcohol separation tower.

[0013] Preferably, an alcohol separation tower discharge pump is provided between the bottom liquid outlet of the alcohol separation tower and the yellow water dehydration tower.

[0014] Preferably, a condensate transfer pump is provided between the condensate collecting tank and the wastewater treatment station, the side line air outlet of the yellow water dehydration tower, the air outlet of the condensate collecting tank and the air outlet of the condensate transfer pump are all connected to a liquid ring vacuum pump, the gas outlet of the liquid ring vacuum pump is connected to the waste gas treatment station, and the liquid outlet of the liquid ring vacuum pump is connected to the wastewater treatment station.

[0015] Preferably, a dehydration tower discharge pump is provided between the bottom liquid outlet of the yellow water dehydration tower and the vacuum distillation tower.

[0016] Preferably, a vacuum distillation tower reflux pump is provided between the liquid outlet of the light component collection tank and the light component collection tank, and the gas outlet of the vacuum distillation tower reflux pump is connected to the side line air inlet of the vacuum distillation tower; the gas outlet of the light component collection tank is connected to the air inlet of the liquid ring vacuum pump.

[0017] Preferably, a heavy component delivery pump is provided between the bottom liquid outlet of the vacuum distillation tower and the heavy component storage tank.

[0018] According to a second aspect of the present invention, there is provided a method for separating and purifying yellow wine water using the above-mentioned separation and purification device, comprising the following steps:

[0019] S1. Using low-pressure steam as a heat source, the yellow water is passed into an alcohol separation tower for separation at normal pressure, and the mixture containing alcohol is separated at the top of the tower and then cooled in an alcohol cooler and collected;

[0020] S2, passing the bottom material of the alcohol separation tower into a yellow water dehydration tower for negative pressure dehydration, the steam at the top of the tower passes through a steam compressor to provide heat energy for the yellow water dehydration tower, and the liquid at the side line outlet is transported to a sewage treatment station for treatment;

[0021] S3. The bottom material of the yellow water dehydration tower is passed into a vacuum distillation tower for negative pressure distillation. The light component material is extracted from the top of the vacuum distillation tower and stored in a light component storage tank after cooling. The heavy component material is extracted from the bottom of the vacuum distillation tower and stored in a heavy component storage tank.

[0022] Preferably, the organic waste gas output from the side outlet of the yellow water dehydration tower is absorbed by a liquid ring vacuum pump and then sent to a waste gas treatment station for treatment.

[0023] (III) Beneficial effects

[0024] The present invention provides a separation and purification device and separation and purification method for yellow wine water.

[0025] Beneficial effects:

[0026] (1) This scheme provides a separation and purification device for brewing yellow water, which adopts a three-tower series connection method and combines the MVR energy-saving process. According to the different boiling points of various substances in the yellow water, it is fractionated by category, which can greatly reduce the COD value in the sewage and reduce the treatment load of the sewage treatment plant.

[0027] (2) The present invention provides a separation and purification device for yellow brewing water. By setting a transmission pump between each tower, the separation and purification process of yellow brewing water can be carried out automatically, thereby greatly reducing the treatment cost of yellow brewing water and realizing industrial scale-up.

[0028] (3) This scheme provides a method for separating and purifying yellow water from brewing. The method adopts a negative pressure distillation process to reduce the loss of beneficial flavor amplitude. The yellow water dehydration tower adopts the MVR energy-saving process to greatly reduce the operating heat consumption of the process. The COD value of the wastewater generated during the separation process is reduced from 30,000 mg / L in the yellow water to 5,000 mg / L, which greatly reduces the burden of sewage treatment and reduces the emission of pollutants. BRIEF DESCRIPTION OF THE DRAWINGS

[0029] Figure 1 A separation and purification device for yellow wine water provided by the present invention;

[0030] Among them, 1. Low-pressure steam pipeline network; 2. Yellow water collecting tank; 3. Alcohol separation tower; 4. Yellow water dehydration tower; 5. Vacuum distillation tower; 6. Alcohol storage tank; 7. Wastewater treatment station; 8. Light component storage tank; 9. Heavy component storage tank; 10. Liquid ring vacuum pump; 11. Waste gas treatment station; 31. Alcohol cooler; 32. Alcohol collecting tank; 33. Alcohol distillation tower reflux pump; 34. Alcohol separation tower feed pump; 35. Alcohol separation tower discharge pump; 41. Steam compressor; 42. Condensate collecting tank; 43. Condensate delivery pump; 44. Dehydration tower discharge pump; 51. Distillation tower top cooler; 52. Light component collecting tank; 53. Vacuum distillation tower reflux pump; 54. Heavy component delivery pump. DETAILED DESCRIPTION

[0031] In order to better illustrate the content of the present invention, a detailed description is given below in conjunction with specific embodiments.

[0032] A separation and purification device for yellow wine water, such as Figure 1 As shown, it includes a low-pressure steam network 1, a yellow water collecting tank 2, an alcohol separation tower 3, a yellow water dehydration tower 4 and a vacuum distillation tower 5. The low-pressure steam network 1 is connected to the alcohol separation tower 3 and the vacuum distillation tower 5 through pipelines to provide heat for the alcohol separation tower 3 and the vacuum distillation tower 5;

[0033] The yellow water from the wine brewing workshop is transported to the yellow water collecting tank 2 through a pipeline. The yellow water collecting tank 2 is connected to the alcohol separation tower 3 through the alcohol separation tower feed pump 34, so that the yellow water in the yellow water collecting tank 2 is transported to the alcohol separation tower 3. The alcohol separation tower 3 uses low-pressure steam as a heat source and operates at normal pressure. It produces alcohol, methanol, isopropanol and other substances with a boiling point below 100°C at the top. The top gas outlet of the alcohol separation tower 3, the alcohol cooler 31, the alcohol collecting tank 32, and the alcohol fractionation tower reflux pump 3 The liquid outlet of the alcohol separation tower 3 is connected to the alcohol storage tank 6 in sequence, so that the mixed gas containing alcohol, methanol and isopropanol at the top of the alcohol separation tower 3 is cooled by the alcohol cooler 31 and then enters the alcohol collection tank 32 for collection, and then is transported to the alcohol storage tank 6 through the liquid outlet of the alcohol fractionation tower reflux pump 33; the bottom liquid outlet of the alcohol separation tower 3 is connected to the middle feed port of the yellow water dehydration tower 4 through the alcohol separation tower discharge pump 35, so that the yellow water after alcohol separation is immersed in the yellow water dehydration tower 4 for dehydration;

[0034] The top gas outlet of the yellow water dehydration tower 4 is connected to the steam compressor 41, and the water vapor pressurized by the steam compressor 41 provides heat energy for the yellow water dehydration tower 4 again. The side line outlet of the yellow water dehydration tower 4 is connected to the condensate collection tank 42, and the condensate collection tank 42 is connected to the sewage treatment station 7 through the condensate delivery pump 43. The COD value of the wastewater separated by the alcohol dehydration tower 4 is less than 5000 mg / L. The bottom liquid outlet of the yellow water dehydration tower 4 is connected to the middle liquid inlet of the vacuum distillation tower 5 through the dehydration tower discharge pump 44, so that the dehydrated yellow water is subjected to negative pressure distillation treatment;

[0035] The top gas outlet of the vacuum distillation tower 5, the top cooler 51 of the distillation tower, the light component collection tank 52 and the light component storage tank 8 are connected in sequence, so that the beneficial flavor substances with a boiling point between 100 and 150° C. after negative pressure distillation in the vacuum distillation tower 5 are collected and recovered through the top of the tower; the bottom liquid outlet of the vacuum distillation tower 5 is connected to the heavy component storage tank 9 through the residual liquid delivery pump 54, so that the heavy component flavor substances with a boiling point greater than 150° C. are collected through the bottom output of the tower.

[0036] In a specific embodiment, the gas outlet of the alcohol distillation tower reflux pump 33 is connected to the side line air inlet of the alcohol separation tower 3, so that in the process of transporting liquid alcohol to the alcohol storage tank 6, the existing gaseous alcohol is re-transported to the alcohol distillation tower 33 and then re-cooled.

[0037] In a specific embodiment, the side line air outlet of the yellow water dehydration tower 4, the air outlet of the condensate collecting tank 42 and the air outlet of the condensate delivery pump 43 are all connected to the liquid ring vacuum pump 10, the gas outlet of the liquid ring vacuum pump 10 is connected to the waste gas treatment station 11, and the liquid outlet of the liquid ring vacuum pump 10 is connected to the sewage treatment station 7. By setting up the liquid ring vacuum pump 10, the gas in the pipeline is sucked, which not only performs subsequent harmless treatment, but also improves the safety of the entire device.

[0038] In a specific embodiment, the gas outlet of the vacuum distillation tower reflux pump 53 is connected to the side line gas inlet of the vacuum distillation tower 5, and the gas in the vacuum distillation tower reflux pump 53 is re-transported to the vacuum distillation tower 5 and then re-cooled.

[0039] The gas outlet of the light component collection tank 52 is connected to the gas inlet of the liquid ring vacuum pump 10, so that the waste gas in the light component collection tank 52 is subjected to waste gas removal treatment.

[0040] The present invention adopts the above-mentioned separation and purification device for brewing yellow water to carry out separation and purification treatment, and the method is as follows:

[0041] S1. Using low-pressure steam as a heat source, the yellow water is passed into an alcohol separation tower for separation at normal pressure. The mixture containing alcohol is separated at the top of the tower and then cooled in an alcohol cooler for collection. After collection, it is transported to an alcohol storage tank through an alcohol collection tank;

[0042] S2. The bottom material of the alcohol separation tower is passed into the yellow water dehydration tower for negative pressure dehydration at an absolute pressure of 10 KPa. The steam at the top of the tower provides heat energy for the yellow water dehydration tower through a steam compressor. The liquid at the side line outlet is transported to a sewage treatment station for treatment.

[0043] S3, passing the bottom material of the yellow water dehydration tower into a vacuum distillation tower for negative pressure distillation, the light component material with a boiling point of 100-150°C is extracted from the top of the vacuum distillation tower, and stored in a light component storage tank after cooling, and the heavy component material with a boiling point greater than 150°C is extracted from the bottom of the vacuum distillation tower and stored in a heavy component storage tank;

[0044] The organic waste gas output from the side outlet of the yellow water dehydration tower is absorbed by the liquid ring vacuum pump and then sent to the waste gas treatment station for treatment.

[0045] The device for separating and purifying brewing yellow water provided by the present invention can make the brewing yellow water pass through three towers in sequence for separation, so that the four fractions of the brewing yellow water divided according to different boiling points are separated in sequence, and the final wastewater COD value is reduced to below 5000 mg / L, which greatly reduces the burden of sewage treatment, and at the same time recovers beneficial flavor substances for utilization.

[0046] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A separation and purification device for yellow wine water, characterized in that: It comprises a low-pressure steam pipe network (1), a yellow water collecting tank (2), an alcohol separation tower (3), a yellow water dehydration tower (4) and a vacuum distillation tower (5), wherein the low-pressure steam pipe network (1) is connected to the alcohol separation tower (3) and the vacuum distillation tower (5) through pipelines respectively; The yellow water from the fermentation workshop is transported to the yellow water collecting tank (2), the yellow water collecting tank (2) is connected to the middle feed port of the alcohol separation tower (3), the top gas outlet of the alcohol separation tower (3), the alcohol cooler (31), the alcohol collecting tank (32), the liquid outlet of the alcohol fractionation tower reflux pump (33) and the alcohol storage tank (6) are connected in sequence, and the bottom liquid outlet of the alcohol separation tower (3) is connected to the middle feed port of the yellow water dehydration tower (4); The top gas outlet of the yellow water dehydration tower (4) provides heat energy to the yellow water dehydration tower (4) through a steam compressor (41); the side line liquid outlet of the yellow water dehydration tower (4) is connected to a condensate collecting tank (42); the condensate collecting tank (42) is connected to a sewage treatment station (7); and the bottom liquid outlet of the yellow water dehydration tower (4) is connected to a middle liquid inlet of the vacuum distillation tower (5); The top gas outlet of the vacuum distillation tower (5), the top cooler (51), the light component collection tank (52) and the light component storage tank (8) are connected in sequence, and the bottom liquid outlet of the vacuum distillation tower (5) is connected to the heavy component storage tank (9).

2. The separation and purification device for yellow wine water according to claim 1, characterized in that: The yellow water collection tank (2) is connected to the alcohol separation tower (3) via an alcohol separation tower feed pump (34), and the gas outlet of the alcohol fractionation tower reflux pump (33) is connected to the side line air inlet of the alcohol separation tower (3).

3. The separation and purification device for yellow wine water according to claim 1, characterized in that: An alcohol separation tower discharge pump (35) is provided between the bottom liquid outlet of the alcohol separation tower (3) and the yellow water dehydration tower (4).

4. The separation and purification device for yellow wine water according to claim 1, characterized in that: A condensate delivery pump (43) is provided between the condensate collection tank (42) and the wastewater treatment station (7); the side line gas outlet of the yellow water dehydration tower (4), the gas outlet of the condensate collection tank (42) and the gas outlet of the condensate delivery pump (43) are all connected to a liquid ring vacuum pump (10); the gas outlet of the liquid ring vacuum pump (10) is connected to the waste gas treatment station (11); and the liquid outlet of the liquid ring vacuum pump (10) is connected to the wastewater treatment station (7).

5. The separation and purification device for yellow wine water according to claim 1, characterized in that: A dehydration tower discharge pump (44) is provided between the bottom liquid outlet of the yellow water dehydration tower (4) and the vacuum distillation tower (5).

6. The separation and purification device for yellow wine water according to claim 1, characterized in that: A vacuum distillation tower reflux pump (53) is provided between the liquid outlet of the light component collection tank (52) and the light component collection tank (8); the gas outlet of the vacuum distillation tower reflux pump (53) is connected to the side line air inlet of the vacuum distillation tower (5); and the gas outlet of the light component collection tank (52) is connected to the air inlet of the liquid ring vacuum pump (10).

7. The separation and purification device for yellow wine water according to claim 1, characterized in that: A heavy component delivery pump (54) is provided between the bottom liquid outlet of the vacuum distillation tower (5) and the heavy component storage tank (9).

8. The method for separating and purifying yellow wine water according to claim 1, characterized in that: The separation and purification device according to any one of claims 1 to 7 comprises the following steps: S1. Using low-pressure steam as a heat source, the yellow water is passed into an alcohol separation tower for separation at normal pressure, and the mixture containing alcohol is separated at the top of the tower and then cooled in an alcohol cooler and collected; S2, passing the bottom material of the alcohol separation tower into a yellow water dehydration tower for negative pressure dehydration, the steam at the top of the tower passes through a steam compressor to provide heat energy for the yellow water dehydration tower, and the liquid at the side line outlet is transported to a sewage treatment station for treatment; S3. The bottom material of the yellow water dehydration tower is passed into a vacuum distillation tower for negative pressure distillation. The light component material is extracted from the top of the vacuum distillation tower and stored in a light component storage tank after cooling. The heavy component material is extracted from the bottom of the vacuum distillation tower and stored in a heavy component storage tank.

9. The method for separating and purifying yellow wine water according to claim 8, characterized in that: The organic waste gas output from the side line gas outlet of the yellow water dehydration tower is absorbed by a liquid ring vacuum pump and then sent to a waste gas treatment station for treatment.

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