Packing type alcohol recovery tower

Abstract

The utility model relates to a packing type alcohol recovery tower which comprises a distillation still and a distillation tower, the distillation tower comprises a reheating section and a rectifying section which are distributed up and down, corrugated packing is arranged in the rectifying section, and a plurality of heating guide plates extending vertically and a steam-water separator are fixedly arranged in the reheating section. The multiple heating guide plates are arranged in the transverse direction, a flow guide gap is formed between every two adjacent heating guide plates, and the steam-water separator is located above the multiple heating guide plates; the top of the distillation tower is connected with a condenser through a first pipeline, an alcohol liquid outlet of the condenser is connected with a cooler through a second pipeline, and an alcohol liquid outlet of the cooler is connected with an alcohol storage tank through a third pipeline. According to the distillation tower disclosed by the utility model, the alcohol steam is secondarily heated by arranging the reheating section, so that the alcohol steam is prevented from being liquefied when encountering cold, more alcohol steam enters the condenser, and the alcohol recovery efficiency is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of alcohol recovery, in particular to a packed alcohol recovery tower. Background Art

[0002] The alcohol recovery tower is mainly used for recovering dilute alcohol in industries such as pharmaceuticals, food, chemical engineering, and light industry, and can also be used for the distillation of other solvents such as methanol. It mainly utilizes the principle that the boiling point of alcohol is lower than that of other solutions, heats and volatilizes the dilute alcohol solution to be recovered at a temperature slightly higher than the boiling point of alcohol, and after distillation through the tower body, the concentration of alcohol is increased to achieve the purpose of recovering alcohol. The alcohol recovery tower includes a tower kettle, a tower body, and a condenser. The tower kettle is connected to the tower body. A heating evaporator is provided in the tower kettle. The top of the tower body is directly connected to the condenser through a pipeline. Through the condensation effect of the condenser, the recovery of alcohol is realized.

[0003] When the existing alcohol recovery tower is in use, the dilute alcohol is heated and evaporated into alcohol vapor by the heating evaporator in the tower kettle. Usually, the height of the tower body is very high, and as the alcohol vapor rises, the temperature gradually decreases, causing a part of the alcohol vapor to turn into a liquid state and return to the tower kettle for reheating before entering the condenser. Therefore, only a small part of the alcohol vapor enters the condenser for condensation each time, resulting in poor distillation effect, slow alcohol recovery efficiency, and low purity of the recovered alcohol. Summary of the Utility Model

[0004] Aiming at the deficiencies of the prior art, the utility model provides an alcohol recovery tower that improves the alcohol recovery efficiency.

[0005] The utility model is realized by the following technical solutions. A packed alcohol recovery tower includes a distillation kettle and a distillation tower. The distillation tower is located above the distillation kettle and is integrally connected to the distillation kettle. A heating evaporator is provided in the distillation kettle. The distillation tower includes a reheating section and a rectifying section arranged up and down. Corrugated packing is provided in the rectifying section. A plurality of vertically extending heating guide plates and a steam-water separator are fixedly provided in the reheating section. The plurality of heating guide plates are arranged horizontally, and a flow guiding gap is provided between adjacent heating guide plates. The steam-water separator is located above the plurality of heating guide plates. The top of the distillation tower is connected to a condenser through a first pipeline. The alcohol outlet of the condenser is connected to a cooler through a second pipeline. The alcohol outlet of the cooler is connected to an alcohol storage tank through a third pipeline. A control valve and a flow meter are installed on the third pipeline.

[0006] In this solution, dilute alcohol is heated into alcohol vapor by a heating evaporator. The alcohol vapor rises and enters a distillation column. After being filtered and purified by the corrugated packing in the rectifying section, it enters the reheating section. After being reheated by the heating guide plate in the reheating section, it enters a condenser. The distillation column reheats the alcohol vapor twice by setting up a reheating section, preventing the alcohol vapor from liquefying when it meets cold, enabling more alcohol vapor to enter the condenser, and thus improving the alcohol recovery efficiency. There are diversion gaps between multiple heating guide plates in the reheating section, facilitating the passage of alcohol vapor and improving the heating efficiency of the alcohol vapor. The water vapor in the alcohol vapor is filtered by a steam-water separator, further improving the purity of alcohol distillation.

[0007] As an optimization, the alcohol outlet of the cooler is connected to an alcohol concentration detection device through a sampling pipeline, and a control valve is installed on the sampling pipeline. In this optimized solution, the alcohol after distillation is detected by the alcohol concentration detection device, facilitating the judgment of whether the alcohol concentration meets the standard.

[0008] As an optimization, the alcohol outlet of the cooler is connected to the distillation column through a reflux pipeline, and a control valve is installed on the reflux pipeline. In this optimized solution, the alcohol returns to the distillation column through the reflux pipeline for re-distillation to improve the purity of the alcohol.

[0009] As an optimization, the reflux pipeline is connected to the rectifying section. In this optimized solution, the alcohol refluxes into the rectifying section, is filtered and purified, and then refluxes into the distillation kettle.

[0010] As an optimization, a balance valve is installed on the second pipeline. In this optimized solution, the alcohol delivery pressure is balanced, improving safety.

[0011] As an optimization, the heating guide plate is of a wavy structure. In this optimized solution, the contact area between the alcohol vapor and the heating guide plate is increased, further improving the heating efficiency.

[0012] As an optimization, the cooling water outlet of the condenser and the cooling water inlet of the cooler are connected through a fifth pipeline. In this optimized solution, the cooling water passes through the condenser and the cooler in sequence, improving the utilization rate of the cooling water.

[0013] The beneficial effects of the present utility model are as follows: Dilute alcohol is heated into alcohol vapor by a heating evaporator. The alcohol vapor rises and enters a distillation column. After being filtered and purified by the corrugated packing in the rectifying section, it enters the reheating section. After being reheated by the heating guide plate in the reheating section, it enters a condenser. The distillation column reheats the alcohol vapor twice by setting up a reheating section, preventing the alcohol vapor from liquefying when it meets cold, enabling more alcohol vapor to enter the condenser, and thus improving the alcohol recovery efficiency. The alcohol after distillation can be detected by an alcohol concentration detection device. According to the alcohol concentration, the alcohol is selected to be transported to an alcohol storage tank or refluxed to the distillation column for multiple distillations to improve the alcohol purity, making it more convenient to use. Description of the Drawings

[0014] Figure 1 This is the structural schematic diagram of the utility model;

[0015] Figure 2 is Figure 1 the enlarged view of part A of

[0016] Figure 3 is the top view of the distribution of the heating guide plates in the reheating section;

[0017] As shown in the figure:

[0018] 1. Distillation kettle, 2. Distillation column, 21. Rectifying section, 211. Corrugated packing, 22. Reheating section, 221. Heating guide plate, 222. Steam-water separator, 3. First pipeline, 4. Condenser, 5. Second pipeline, 6. Cooler, 7. Third pipeline, 8. Alcohol storage tank, 9. Sampling pipeline, 10. Alcohol concentration detection device, 11. Return pipeline, 12. Control valve, 13. Fifth pipeline, 14. Balance valve, 15. Flowmeter, 16. Heating evaporator. Specific embodiments

[0019] To clearly illustrate the technical features of this solution, the following will elaborate on this solution through specific embodiments.

[0020] As Figures 1 to 3 shown, a packed alcohol recovery column includes a distillation kettle 1 and a distillation column 2. The distillation column 2 is located above the distillation kettle 1 and is integrally connected to the distillation kettle 1. A heating evaporator 16 is provided in the distillation kettle 1, and a feeding port and a discharging port are respectively provided at the top and bottom of the distillation kettle 1.

[0021] The distillation column 2 includes a reheating section 22 and a rectifying section 21 which are distributed up and down. Corrugated packing 211 is provided in the rectifying section 21. In this embodiment, the corrugated packing 211 is fixedly installed in the inner cylinder of the rectifying section 21. A plurality of vertically extending heating guide plates 221 and a steam-water separator 222 are fixedly provided in the reheating section 22. The plurality of heating guide plates 221 are arranged horizontally, and a flow guiding gap is provided between adjacent heating guide plates 221. In this embodiment, three heating guide plates 221 are fixedly connected in the reheating section 22. The heating guide plates 221 are of a wave structure, and the steam-water separator 222 is located above the plurality of heating guide plates 221.

[0022] The top of the distillation column 2 is connected to a condenser 4 through a first pipeline 3. An alcohol inlet and an alcohol outlet are respectively provided at the top and bottom of the condenser 4, and a cooling water inlet and a cooling water outlet are provided on the side wall of the condenser 4.

[0023] The alcohol outlet of the condenser 4 is connected to a cooler 6 through a second pipeline 5. The top and bottom of the cooler 6 are respectively provided with an alcohol inlet and an alcohol outlet, and the side wall of the cooler 6 is also provided with a cooling water inlet and a cooling water outlet. In this embodiment, a balance valve 14 is installed on the second pipeline 5, and the cooling water outlet of the condenser 4 and the cooling water inlet of the cooler 6 are connected through a fifth pipeline 13.

[0024] The alcohol outlet of the cooler 6 is connected to an alcohol storage tank 8 through a third pipeline 7. A control valve 12 and a flow meter 15 are installed on the third pipeline 7. The alcohol outlet of the cooler 6 is connected to an alcohol concentration detection device 10 through a sampling pipeline 9, and a control valve 12 is installed on the sampling pipeline 9. The alcohol outlet of the cooler 6 is connected to the distillation column 2 through a reflux pipeline 11, and a control valve 12 is installed on the reflux pipeline 11.

[0025] Specifically, the alcohol outlet of the cooler 6 is connected to a four-way pipe fitting, and three ports of the four-way pipe fitting are respectively connected to the third pipeline 7, the sampling pipeline 9 and the reflux pipeline 11. In this embodiment, the alcohol concentration detection device 10 can be an alcohol density meter or an alcohol concentration detector, etc., which are all instruments with the function of detecting alcohol concentration. Such devices can be directly purchased in the market and will not be elaborated here. In this embodiment, the reflux pipeline 11 is connected to the rectifying section 21 of the distillation column 2.

[0026] Working principle: In the distillation kettle 1, the dilute alcohol is heated to alcohol vapor by a heating evaporator 16. The alcohol vapor rises into the distillation column 2. After being filtered and purified by the corrugated packing 211 in the rectifying section 21, the alcohol vapor enters the reheating section 22, is reheated by the heating guide plate 221 in the reheating section, and enters the condenser 4 after being filtered by the steam-water separator 222. The alcohol vapor is liquefied by double cooling of the condenser 4 and the cooler 6. Open the control valve 12 of the sampling pipeline 9 for sampling. The alcohol after distillation can be detected by the alcohol concentration detection device 10. According to the detected alcohol concentration, the alcohol is selected to be transported to the alcohol storage tank 8 or refluxed into the distillation column 2 for multiple distillations to improve the alcohol purity and make it more convenient to use.

[0027] Of course, the above description is not limited to the above examples. The technical features not described in the present invention can be realized by or adopted the prior art, and will not be elaborated here; the above embodiments and drawings are only used to illustrate the technical solutions of the present invention and are not limitations on the present invention. The present invention has been described in detail with reference to the preferred embodiments. Those of ordinary skill in the art should understand that the changes, modifications, additions or substitutions made by those of ordinary skill in the art within the scope of the essence of the present invention do not depart from the purpose of the present invention and should also fall within the scope of the claims of the present invention.

Claims

1. A packed alcohol recovery tower, comprising a still (1) and a distillation tower (2), wherein the distillation tower (2) is located above the still (1) and is integrally connected to the still (1), and a heating evaporator (16) is provided in the still (1), characterized in that: The distillation tower (2) comprises a reheating section (22) and a rectifying section (21) which are arranged vertically, a corrugated packing (211) being provided in the rectifying section (21), a plurality of vertically extending heating guide plates (221) and a steam-water separator (222) being fixedly provided in the reheating section (22), the plurality of heating guide plates (221) being arranged in a transverse direction and a flow guiding gap being provided between adjacent heating guide plates, and the steam-water separator (222) being located above the plurality of heating guide plates; The top of the distillation tower (2) is connected to a condenser (4) via a first pipeline (3); the alcohol liquid outlet of the condenser (4) is connected to a cooler (6) via a second pipeline (5); the alcohol liquid outlet of the cooler (6) is connected to an alcohol storage tank (8) via a third pipeline (7); and a control valve (12) and a flow meter (15) are installed on the third pipeline.

2. A packed alcohol recovery tower according to claim 1, characterized in that: The alcohol liquid outlet of the cooler (6) is connected to an alcohol concentration detection device (10) via a sampling pipeline (9), and a control valve (12) is installed on the sampling pipeline.

3. A packed alcohol recovery tower according to claim 2, characterized in that: The alcohol liquid outlet of the cooler (6) is connected to the distillation tower (2) via a reflux pipeline (11), and a control valve (12) is installed on the reflux pipeline.

4. A packed alcohol recovery tower according to claim 3, characterized in that: The reflux pipeline (11) is connected to the distillation section (21).

5. A packed alcohol recovery tower according to claim 1, characterized in that: A balancing valve (14) is installed on the second pipeline (5).

6. A packed alcohol recovery tower according to claim 1, characterized in that: The heating guide plate (221) is a wave structure.

7. A packed alcohol recovery tower according to claim 1, characterized in that: The cooling water outlet of the condenser (4) and the cooling water inlet of the cooler (6) are connected via a fifth pipeline (13).

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