Collection and treatment device and method for volatile substances in liquor storage

Abstract

The application discloses a liquor storage volatile matter collecting and treating device and a collecting and treating method. The liquor storage volatile matter collecting and treating device comprises a volatile matter collecting system, an air suction compression system and an absorption and desorption system. The volatile matter collecting system is used for collecting the volatile matter discharged from a plurality of liquor storage tanks due to breathing and redistributing the balance of air suction pressure. The air suction compression system is used for pressurizing and gas-liquid separating the absorbed volatile matter mixed gas. The absorption and desorption system is used for absorbing, desorbing and separating Qichun in the mixed gas, so that the high-quality and high-efficiency recovery of ethanol in the liquor storage volatile matter is realized, the liquor body loss caused by breathing during the liquor storage process is effectively reduced, and the pollution of non-methane volatile organic compounds to the air is avoided.

Description

Technical Field

[0001] This invention relates to the field of brewing production technology, and in particular to a device and method for collecting and treating volatile substances stored in baijiu (Chinese liquor). Background Technology

[0002] Aging is a crucial step in the production of baijiu (Chinese liquor). Prolonged storage reduces the harshness and irritation of the liquor; base spirits can be stored for three years or longer. Currently, the industry commonly uses large-capacity stainless steel storage tanks. These tanks are equipped with breather valves. Due to the inflow and outflow of liquor and the influence of temperature, the tanks experience both "large breaths" and "small breaths." Volatile substances such as ethanol in the liquor are released into the air during these processes, resulting in liquor loss and excessive emissions of non-methane volatile organic compounds (NMOs).

[0003] Chinese patent document CN217187946U discloses an ethanol recovery device for yellow water in a liquor distillery. The device includes a first preheater, whose raw material inlet is connected to a yellow water feed pump, whose raw material outlet is connected to the feed inlet of a distillation column, whose gas outlet at the top of the distillation column is connected to the heat source inlet of the first preheater, whose heat source outlet is connected to a condenser, whose condenser is connected to a first gas-liquid separator, and whose liquid phase outlet is connected to a reflux tank. This patent utilizes a distillation column to extract ethanol from the yellow water; the first preheater, along with the use of steam ethanol as a heat source, lowers the ethanol temperature while raising the yellow water temperature, thus saving energy; the second preheater fully utilizes the heat energy of the waste liquid; and the second gas-liquid separator further enhances gas-liquid separation, allowing liquid ethanol to directly enter the reflux tank.

[0004] The technical solution disclosed in the above patent can recover ethanol from the yellow water produced in the production of liquor, but its application is not to volatile substances discharged during the storage of liquor. Summary of the Invention

[0005] The technical problem to be solved by the present invention is to provide a device for collecting and treating volatile substances in baijiu storage that can effectively reduce the loss of baijiu during the storage process.

[0006] To solve the above-mentioned technical problems, the technical solution adopted by the present invention is: a collection and treatment device for volatile substances in liquor storage, including a volatile substance collection system, a suction compression system and an absorption and desorption system;

[0007] The volatile matter collection system includes a pre-gravity pressure stabilizing tank and multiple liquor storage tanks. The pre-gravity pressure stabilizing tank is connected to a breather valve located at the outlet of the liquor storage tanks through a volatile pipeline.

[0008] The intake compression system includes a rear gravity pressure stabilizing tank, a gas compressor, and a cooler connected in sequence. The rear gravity pressure stabilizing tank is connected to the front gravity pressure stabilizing tank, and the gas compressor is located between the rear gravity pressure stabilizing tank and the cooler.

[0009] The absorption and desorption system includes an absorption tower, a heater, a desorption tower, an absorbent cooler, a condenser, and an ethanol storage tank. The absorption tower, heater, and desorption tower are connected in sequence. The lower part of the desorption tower is connected to the upper part of the absorption tower through the absorbent cooler, and the upper part of the desorption tower is connected to the ethanol storage tank through the condenser.

[0010] As an improvement to the above solution: the volatile matter collection system further includes a gravity micro-pressure control valve disposed between the breathing valve and the volatile pipeline; a first pressure control valve is also provided between the pre-gravity pressure stabilizing tank and the post-gravity pressure stabilizing tank, and a movable piston disc and a position detection switch electrically connected to the first pressure control valve are provided in the pre-gravity pressure stabilizing tank. The piston disc and the position detection switch cooperate to realize the opening and closing of the first pressure control valve.

[0011] As an improvement to the above solution: the gas compressor is a reciprocating compressor, a liquid ring compressor, or a screw compressor.

[0012] As an improvement to the above scheme: the absorption and desorption system further includes a second pressure control valve installed at the outlet of the absorption tower, an absorption tower bottom pump installed between the bottom of the absorption tower and the heater, and a desorption tower bottom pump installed between the bottom of the desorption tower and the absorbent cooler; the second pressure control valve controls the opening and closing of the absorption tower outlet, the absorption tower bottom pump controls the liquid transport between the absorption tower and the heater, and the desorption tower bottom pump controls the liquid transport between the desorption tower and the absorbent cooler.

[0013] As an improvement to the above scheme, the absorbent provided in the absorbent cooler is glycerin.

[0014] This invention also discloses a method for collecting and treating volatile substances stored in baijiu using the aforementioned baijiu storage volatiles collection device. The method involves controlling the opening of the baijiu storage tank's outlet so that the mixed gas inside the tank is pressurized by a gas compressor and then cooled in a cooler. It then enters an absorption tower where it undergoes mass transfer with the absorbent supplied by an absorbent cooler. The ethanol component in the mixed gas is absorbed by the absorbent. The absorbent, after absorbing the ethanol component, enters a heater and is heated above the boiling point of ethanol. It then enters a desorption tower where it is separated into ethanol gas and the absorbent. The ethanol gas is cooled into liquid ethanol by a condenser and stored in an ethanol storage tank. The absorbent is cooled in an absorbent cooler and then sent into the absorption tower.

[0015] As an improvement to the above solution: first, start the gas compressor to generate a vacuum in the rear gravity pressure stabilizing tank, and then control the set pressure of the front gravity pressure stabilizing tank to be lower than the inhalation pressure of the breathing valve through the first pressure control valve.

[0016] The beneficial effects of this invention are:

[0017] 1. This invention collects volatiles emitted from multiple baijiu storage tanks due to respiration using a volatiles collection system and redistributes the balance of inhalation pressure. A respiration compression system pressurizes and separates the absorbed volatile mixture gas. An absorption-desorption system absorbs, desorbs, and separates Qichun ethanol from the mixture gas. This achieves high-quality and high-efficiency recovery of ethanol from baijiu storage volatiles, effectively reducing the loss of baijiu due to respiration during storage, while avoiding air pollution caused by the emission of non-methane volatile organic compounds.

[0018] 2. This invention controls the discharge of volatiles from a liquor storage tank by installing a gravity micro-pressure control valve at the outlet of the tank. It utilizes the pressure of the volatiles within the tank as the power source for opening, eliminating the need for external force. When a large amount of volatiles accumulates in the tank, it automatically opens and closes under the combined pressure of the tank top and the vacuum of the pre-positioned gravity pressure stabilizing tank, reducing operator workload and ensuring reliable operation. The gravity micro-pressure control valve exhibits high sensitivity, good sealing, and minimal pressure fluctuation, providing excellent sealing reliability and safety.

[0019] 3. This invention achieves pressure zone control of the liquor storage tank by setting up two sets of gravity stabilizing tanks at the front and rear, balancing the suction pressure of volatiles collected from multiple liquor storage tanks, maintaining the pressure balance of the entire system, and avoiding the problem of uneven suction pressure in each liquor storage tank due to excessively long evaporation pipes; the gravity stabilizing tank uses the gravity of the internal movable piston disc to balance the vacuum of the suction pipe, making the suction pressure more stable and effectively balancing the airflow pulsation caused by the operation of the gas compressor.

[0020] 4. This invention accommodates more mixed gas by setting up a pre-gravity pressure stabilizing tank and a post-gravity pressure stabilizing tank. When the gas compressor pressurizes the inhaled mixed gas, it increases the amount of gas compressed each time the gas compressor works, which can reduce the number of times the gas compressor starts and effectively reduce system energy consumption.

[0021] 5. This invention uses glycerol as an absorbent, which can avoid the binary azeotropic phenomenon during desorption, facilitate the desorption of ethanol vapor, and result in high purity of recovered ethanol, thus improving the quality of ethanol recovery; the absorbent can be recycled, reducing the consumption of absorbent. Attached Figure Description

[0022] Figure 1A system diagram of a collection and treatment device for storing volatile substances in baijiu (Chinese liquor).

[0023] The components in the diagram are labeled as follows: 100-Volatile matter collection system, 110-Liquor storage tank, 120-Pre-gravity pressure stabilizing tank, 130-Volatile pipeline, 140-Breathing valve, 150-Gravity micro-pressure control valve, 160-First pressure control valve, 200-Intake compression system, 210-Post-gravity pressure stabilizing tank, 220-Gas compressor, 230-Cooler, 300-Absorption and desorption system, 310-Absorption tower, 320-Heater, 330-Desorption tower, 340-Absorbent cooler, 350-Condenser, 360-Ethanol storage tank, 370-Second pressure control valve, 380-Absorption tower bottom pump, 390-Desorption tower bottom pump. Detailed Implementation

[0024] To facilitate understanding of the present invention, the invention will be further described below with reference to the accompanying drawings.

[0025] In the description of this invention, it should be noted that the terms "front", "rear", "left", "right", "up", "down", "inner", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of description, and do not indicate or imply that the device or component referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this invention.

[0026] like Figure 1 As shown, the volatile matter collection and treatment device for baijiu storage disclosed in this invention consists of a volatile matter collection system 100, an intake compression system 200, and an absorption and desorption system 300. The volatile matter collection system 100 can centrally collect the volatile matter emitted from multiple baijiu storage tanks 110 during respiration, while simultaneously balancing their intake pressure. The intake compression system 200 can draw in a volatile matter mixture by generating a vacuum, and simultaneously pressurize and cool the drawn-in volatile matter mixture to achieve gas-liquid separation. The absorption and desorption system 300 can absorb, desorb, and separate ethanol in the volatile matter mixture system, while simultaneously recovering the absorbent for recycling.

[0027] Specifically, such as Figure 1As shown, the volatile matter collection system 100 of this invention includes multiple liquor storage tanks 110 and a pre-gravity pressure stabilizing tank 120 connected to the liquor storage tanks 110. Each liquor storage tank 110 is equipped with a breather valve 140 at its outlet. The breather valve 140 of each liquor storage tank 110 is connected to the pre-gravity pressure stabilizing tank 120 via a volatile matter pipe 130. Multiple liquor storage tanks 110 are connected in series via the volatile matter pipe 130. The volatile matter from each liquor storage tank 110 is collected individually using branch pipes of the volatile matter pipe 130. The volatile matter discharged from the liquor storage tanks 110 is collected into the pre-gravity pressure stabilizing tank 120 via the volatile matter pipe 130. Each liquor storage tank 110 is equipped with a gravity micro-pressure control valve 150 at its corresponding breather valve 140. The gravity micro-pressure control valve 150 opens and closes the valve through a gravity ball valve core, which can control the pressure at the top of the liquor storage tank 110 and can automatically open and close under the action of the internal air pressure of the liquor storage tank 110.

[0028] Specifically, such as Figure 1 As shown, the intake compression system 200 of this invention includes a post-gravity pressure stabilizing tank 210, a gas compressor 220, and a cooler 230. The gas compressor 220 pressurizes the collected volatile mixture gas, generating the vacuum required by the volatile collection system 100, and also pressurizes the volatile mixture gas to the pressure required by the intake and exhaust system 300. The cooler 230 cools the pressurized volatile mixture gas to achieve gas-liquid separation. The gas compressor 220 can be a reciprocating compressor, a liquid ring compressor, or a screw compressor, with a reciprocating compressor being the preferred option. The post-gravity pressure stabilizing tank 210 is connected to the pre-gravity pressure stabilizing tank 120 in the volatile collection system 100, and a first pressure control valve 160 is provided on the connecting pipeline between the two. The gas compressor 220 is located between the post-gravity pressure stabilizing tank 210 and the cooler 230. The pre-gravity pressurization tank 120 and the post-gravity pressurization tank 210 work together to form a two-stage gravity pressurization tank, which can hold more volatiles. Both the pre-gravity pressurization tank 120 and the post-gravity pressurization tank 210 are equipped with a floating piston disc and a position detection switch electrically connected to the first pressure control valve 160. The piston disc and the position detection switch work together to open and close the first pressure control valve 160. The gravity pressurization tank can work with the gas compressor 220 to generate a vacuum within it; simultaneously, the gravity pressurization tank can balance the vacuum in the suction line through the gravity of the floating piston disc, making the suction pressure more stable.

[0029] Specifically, such as Figure 1As shown, the absorption and desorption system 300 of this invention includes an absorption tower 310, a heater 320, a desorption tower 33, an absorbent cooler 340, a condenser 350, an ethanol storage tank 360, a second pressure control valve 370, an absorption tower bottom pump 380, and a desorption tower bottom pump 390. The absorption tower 310, heater 320, and desorption tower 330 are connected in sequence. The lower part of the desorption tower 330 is connected to the upper part of the absorption tower 310 through the absorbent cooler 340, and the upper part of the desorption tower 330 is connected to the ethanol storage tank 360 through the condenser 350. A second pressure control valve 370 is located at the outlet of the absorption tower 310. A bottom pump 380 is located between the bottom of the absorption tower 310 and the heater 320. A bottom pump 390 is located between the bottom of the desorption tower 330 and the absorbent cooler 340. The second pressure control valve 370 controls the opening and closing of the outlet of the absorption tower 310, the bottom pump 380 controls the liquid transport between the absorption tower 310 and the heater 320, and the bottom pump 390 controls the liquid transport between the desorption tower 330 and the absorbent cooler 340. The absorbent cooler 340 contains absorbent, which can supply absorbent to the absorption tower 310; glycerol is the preferred absorbent.

[0030] This invention also discloses a method for collecting and treating volatile substances from liquor storage, which employs the aforementioned collection device for volatile substances from liquor storage and is carried out according to the following steps:

[0031] S1. Start the gas compressor 220 to generate a vacuum in the rear gravity pressure stabilizing tank 210. Adjust the height of the piston plate in the front gravity pressure stabilizing tank 120 through the first pressure control valve 160 to control the set pressure of the front gravity pressure stabilizing tank 120 to be slightly lower than the suction pressure of the breather valve 140 at the outlet of the liquor storage tank 110. When the top pressure of the liquor storage tank 110 increases due to rising temperature or liquor collection work, the pressure at the top of the liquor storage tank 110 and the pressure in the front gravity pressure stabilizing tank 120 are adjusted. Under the action of the vacuum degree of 20, the gravity micro-pressure control valve 150 is opened, and the volatile mixture gas in the liquor storage tank 110 enters the pre-gravity pressure stabilizing tank 120 through the evaporation pipe 130. As the volatile mixture gas is continuously introduced into the pre-gravity pressure stabilizing tank 120, the piston plate in the pre-gravity pressure stabilizing tank 120 is pressed down and triggers the position detection switch. The first pressure control valve 160 controlled by the position detection switch opens, and the volatile mixture gas enters the post-gravity pressure stabilizing tank 210.

[0032] S2. The volatile mixture is discharged from the post-gravity pressure stabilizing tank 210 to the gas compressor 220. The gas compressor 220 pressurizes the volatile mixture. The pressurized volatile mixture enters the cooler 230 for cooling. After recovering the condensate, the cooled mixture enters the absorption tower 310. The mixture rises in the absorption tower 310 and reacts with the absorbent fed by the absorbent cooler 340. The ethanol component in the mixture is absorbed by the absorbent, while the separated air is discharged to the outside atmosphere through the second pressure control valve 370 at the top of the absorption tower 310.

[0033] S3. The bottom pump 380 of the absorber tower pumps the absorbent containing ethanol in the absorber tower 310 to the heater 320. The heater 320 heats the absorbent containing ethanol to above the boiling point of ethanol and then sends it to the desorption tower 330. In the desorption tower 330, the ethanol in the absorbent evaporates, and the ethanol gas enters the condenser 350 to be cooled into ethanol liquid, which is finally transported to the ethanol storage tank 360 for storage. The non-evaporating absorbent separated in the desorption tower 330 is pressurized by the bottom pump 390 and then enters the absorbent cooler 340 for cooling and cooling, and finally sent to the absorber tower 310 for the next mass transfer process to achieve recycling.

Claims

1. A device for collecting and treating volatile substances from liquor storage, characterized in that: The volatile collection system (100), the suction compression system (200) and the absorption desorption system (300) are included. The volatile collection system (100) includes a front gravity stabilizing tank (120) and a plurality of liquor storage tanks (110), the front gravity stabilizing tank (120) is communicated with a breathing valve (140) arranged at the outlet of the liquor storage tank (110) through a volatile pipeline (130). The suction compression system (200) includes a rear gravity stabilizing tank (210), a gas compressor (220) and a cooler (230) connected in sequence, the rear gravity stabilizing tank (210) is communicated with the front gravity stabilizing tank (120), the gas compressor (220) is arranged between the rear gravity stabilizing tank (210) and the cooler (230). The absorption desorption system (300) includes an absorption tower (310), a heater (320), a desorption tower (330), an absorbent cooler (340), a condenser (350) and an ethanol storage tank (360), the absorption tower (310), the heater (320) and the desorption tower (330) are communicated in sequence, the lower part of the desorption tower (330) is communicated with the upper part of the absorption tower (310) through the absorbent cooler (340), the upper part of the desorption tower (330) is communicated with the ethanol storage tank (360) through the condenser (350). The volatile collection system (100) further includes a gravity micro-pressure control valve (150) arranged between the breathing valve (140) and the volatile pipeline (130); a first pressure control valve (160) is further arranged between the front gravity stabilizing tank (120) and the rear gravity stabilizing tank (210), a movable piston disc is arranged in the front gravity stabilizing tank (120), and a position detection switch electrically connected with the first pressure control valve (160), the piston disc and the position detection switch cooperate to realize the opening and closing of the first pressure control valve (160).

2. The collection and management device for storing volatile substances of Baijiu as claimed in claim 1, characterized in that: The gas compressor (220) is a reciprocating compressor, a liquid ring compressor or a screw compressor.

3. The collection and management device for storing volatile substances of white wine according to claim 1, characterized in that: The absorption desorption system (300) further includes a second pressure control valve (370) arranged at the outlet of the absorption tower (310), an absorption tower bottom pump (380) arranged between the bottom of the absorption tower (310) and the heater (320), and a desorption tower bottom pump (390) arranged between the bottom of the desorption tower (330) and the absorbent cooler (340); the second pressure control valve (370) controls the opening and closing of the outlet of the absorption tower (310), the absorption tower bottom pump (380) controls the liquid delivery between the absorption tower (310) and the heater (320), and the desorption tower bottom pump (390) controls the liquid delivery between the desorption tower (330) and the absorbent cooler (340).

4. The collection and management device for storing volatile substances of white wine according to claim 1, characterized in that: The absorbent arranged in the absorbent cooler (340) is glycerol.

5. The Baijiu storage volatile matter collection and treatment method using the Baijiu storage volatile matter collection and treatment device according to claim 3, characterized in that: The outlet of the liquor storage tank (110) is opened to allow the mixed gas in the liquor storage tank (110) to enter the cooler (230) after being pressurized by the gas compressor (220), then enter the absorption tower (310) to complete mass transfer with the absorbent sent by the absorbent cooler (340), the ethanol component in the mixed gas is absorbed by the absorbent, and the absorbent after absorbing the ethanol component enters the heater (320) and is heated to above the boiling point of ethanol, then enters the desorption tower (330) and is separated into ethanol gas and absorbent, the ethanol gas is cooled into ethanol liquid by the condenser (350) and sent to the ethanol storage tank (360) for storage, and the absorbent is cooled in the absorbent cooler (340) and then sent into the absorption tower (310).

6. The method of claim 5, wherein the white spirit storage volatile matter collection management method is characterized by: First, start the gas compressor (220) to generate a vacuum degree in the rear gravity pressure stabilizing tank (210), and then control the set pressure of the front gravity pressure stabilizing tank (120) to be lower than the suction pressure of the breather valve (140) through the first pressure control valve (160).

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