An alcohol distillation column and an alcohol distillation system

Abstract

The present invention relates to the technical field of chemical equipment, and discloses an alcohol distillation column and an alcohol distillation system. The alcohol distillation column includes a distillation column body, a liquid inlet pipe, and a first packing layer. The liquid inlet pipe is used to introduce external raw materials into the distillation column body. The first packing layer is arranged inside the distillation column body and is located below the liquid outlet of the liquid inlet pipe. The first packing layer is formed by a plurality of liquid distributors, and the plurality of liquid distributors are distributed in a pyramid structure from top to bottom. Each liquid distributor is provided with a plurality of liquid outlet holes, and the bottom edge is provided with drip serrations. Among them, the pyramid structure means that in adjacent two layers of liquid distributors, the liquid distributor in the lower layer has one more liquid distributor than the liquid distributor in the upper layer, and the liquid distributor in the lower layer is staggered with the liquid distributor in the upper layer. This alcohol distillation column is not easily blocked in the packing layer, improving the quality and output of alcohol. The alcohol distillation system includes the above-mentioned alcohol distillation column, and this alcohol distillation system has a relatively high production efficiency and a relatively low production cost.

Description

Technical Field

[0001] The present invention relates to the technical field of chemical equipment, and particularly to an alcohol distillation column and an alcohol distillation system. Background Art

[0002] Currently, the production method of liquor in the market is to introduce the fermented distillers' grains into a distillation column. Steam is generated at the bottom of the column to distill and extract the alcohol components and flavor components in the distillers' grains. During the distillation process, due to the heat exchange and driving effects of the bottom steam, the alcohol components and flavor components in the distillers' grains gradually concentrate to form steam, which rises layer by layer from the bottom to the top of the column. During this process, the alcohol components are continuously concentrated. At the same time, a large number of alcohol-soluble flavor components present in the distillers' grains are continuously extracted as the alcohol components are continuously concentrated. However, due to the structural limitations of the packing section inside the existing distillation column, the loose structures of the solid distillers' grains are different, and the local densities are not uniform. The upward flow direction and power of the steam or alcohol vapor from bottom to top are also unstable. At the same time, due to human operation factors, it is easy to cause the distillers' grains to press the steam too deeply, that is, the steam or alcohol vapor is deep below the surface of the distillers' grains, which affects the uniform diffusion and upward effect of the steam or alcohol vapor. All of the above situations are likely to cause uneven steam flow inside the distillation column, unstable steam flow power, and the phenomenon of too fast or too slow local steam flow, resulting in the inability to achieve the ideal state of uniform enrichment and flavor enhancement of alcohol components layer by layer, leading to problems such as low alcohol content, low flavor enhancement efficiency, and strong off-flavors of flavor components in the liquor, seriously affecting the production and quality of the liquor. Summary of the Invention

[0003] Based on the above, the purpose of the present invention is to provide an alcohol distillation column and an alcohol distillation system, which are not easily blocked in the packing layer, and can make the distribution of distillers' grains and the diffusion of alcohol vapor uniform and stable, improving the quality and production of liquor.

[0004] To achieve the above object, the present invention adopts the following technical solutions:

[0005] An alcohol distillation column includes a distillation column body, and further includes:

[0006] A liquid inlet pipe for introducing external raw materials into the distillation column body;

[0007] A first packing layer is arranged inside the distillation column body and below the liquid outlet of the liquid inlet pipe. The first packing layer is formed by a plurality of liquid distributors, and the plurality of liquid distributors are distributed in a pyramid structure from top to bottom. Each liquid distributor is provided with a plurality of liquid outlet holes, and the bottom edge is provided with drip sawteeth;

[0008] Among them, the pyramid structure means that in two adjacent layers of the liquid distributors, the liquid distributor in the lower layer has one more liquid distributor than the liquid distributor in the upper layer, and the liquid distributor in the lower layer is staggered with the liquid distributor in the upper layer.

[0009] As a preferred solution of an alcohol distillation column, the same number of liquid distributors as the bottom layer of the pyramid structure are also provided below the pyramid structure.

[0010] As a preferred solution of an alcohol distillation column, the top end of the liquid distributor in the lower layer is connected to the bottom edge of the liquid distributor in the upper layer.

[0011] As a preferred solution of an alcohol distillation column, the liquid distributor includes:

[0012] A diversion surface, on which a plurality of liquid discharge holes are provided; and

[0013] A downstream skirt, connected to the bottom edge of the diversion surface, a cavity is formed between the downstream skirt and the diversion surface, and the drip sawteeth are evenly distributed along the bottom edge of the downstream skirt;

[0014] Among them, the cross-sectional area of the diversion surface gradually increases from top to bottom.

[0015] As a preferred solution of an alcohol distillation column, the diversion surface is set as a conical surface or a pyramidal surface.

[0016] As a preferred solution of an alcohol distillation column, the downstream skirts of the liquid distributors between two adjacent ones in the same layer are seamlessly connected.

[0017] As a preferred solution of an alcohol distillation column, the tooth height of the drip sawteeth ranges from 1.9 cm to 2.1 cm, the tooth pitch ranges from 1.9 cm to 2.1 cm, the liquid discharge holes are round holes, the diameter of the round holes ranges from 0.9 cm to 1.1 cm, and the distance between two adjacent round holes ranges from 1.9 cm to 2.1 cm.

[0018] As a preferred solution of an alcohol distillation column, a second packing layer is further provided in the distillation column body, and the second packing layer is provided above the first packing layer.

[0019] As a preferred solution of an alcohol distillation column, the second packing layer includes a packing rack and packing blocks, and the packing blocks are fixedly arranged in the packing rack.

[0020] An alcohol distillation system includes the alcohol distillation column according to any one of the above technical solutions.

[0021] The beneficial effects of the present invention are:

[0022] The present invention provides an alcohol distillation column, which includes a distillation column body, a liquid inlet pipe and a first packing layer. The first packing layer is formed by a plurality of liquid distributors distributed in a pyramid structure from top to bottom. Each liquid distributor is provided with a plurality of uniformly distributed liquid outlet holes, and drip teeth are arranged at the bottom edge. The raw material enters the interior of the distillation column body through the liquid inlet pipe. When the raw material flows downward from the liquid outlet of the liquid inlet, it passes through the first packing layer and evenly falls into the bottom of the column. Since the first packing layer is in a pyramid structure, the raw material is evenly dispersed through the layers of liquid distributors and undergoes gas-liquid heat and mass transfer with the wine vapor, enabling the gradual enrichment of alcohol components and flavor components. During this process, due to the liquid outlet holes provided on the liquid distributors, the part with a relatively low concentration in the raw material is evenly distributed downward through the liquid outlet holes, and the part with a relatively high concentration flows down along the surface of the liquid distributor. The raw material is not easily blocked in the first packing layer, and there is no need for frequent replacement or maintenance. Moreover, it can be reused after cleaning, thereby improving production efficiency and reducing production costs. After flowing down along the surface of the liquid distributor, the raw material is evenly distributed downward along the drip teeth, making the raw material distributed evenly through each layer of liquid distributor. After passing through multiple layers of liquid distributors, the distribution area of the raw material in the distillation column reaches the maximum and is evenly distributed at the same time, maximizing the gas-liquid heat and mass transfer, thereby enhancing the enrichment and flavor improvement effect of alcohol components, improving the quality and yield of the wine. At the same time, it can also prevent the bottom of the distillation column from being caked due to uneven distribution of the raw material, which may affect production efficiency, damage the product or even damage the distillation column, etc.

[0023] The present invention also provides an alcohol distillation system, which includes the above-mentioned alcohol distillation column. This alcohol distillation system has relatively high production efficiency and low production costs; and the quality and yield of the wine produced by this alcohol distillation system are relatively high. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the following will briefly introduce the drawings required for the description of the embodiments of the present invention. Obviously, the following drawings are only some embodiments of the present invention. For those of ordinary skill in the art, without creative efforts, other drawings can also be obtained based on the content of the embodiments of the present invention and these drawings.

[0025] Figure 1 is a schematic structural diagram of the liquid distributor provided by the embodiment of the present invention;

[0026] Figure 2 is a schematic structural diagram of the alcohol distillation column provided by the embodiment of the present invention;

[0027] Figure 3 is a schematic diagram of the principle of the alcohol distillation system provided by the embodiment of the present invention.

[0028] In the figure:

[0029] 1. Distillation column body; 2. Feed pipe; 20. Spray head;

[0030] 3. First packing layer; 30. Liquid distributor; 31. Flow guiding surface; 32. Downflow skirt; 301. Liquid discharge hole; 302. Drip saw teeth;

[0031] 4. Second packing layer; 5. Crude wine tank; 6. Feed pump; 7. Heat exchanger; 8. Heater; 9. Top condenser; 10. Reflux control valve; 11. Finished wine tank; 12. Feed pump; 13. Feed regulating valve; 14. Flowmeter; 15. Level gauge; 16. Bottom discharge regulating valve; 17. Lees tank; 18. Transfer pump. Detailed implementation mode

[0032] The present invention will be further described in detail below with reference to the drawings and embodiments. It can be understood that the specific embodiments described herein are only used to explain the present invention, rather than limiting the present invention. In addition, it should be noted that for the convenience of description, only parts related to the present invention are shown in the drawings, rather than all structures.

[0033] In the description of the present invention, unless otherwise clearly defined and limited, the terms "connected", "connected", "fixed" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or integrated; it can be a mechanical connection or an electrical connection; it can be directly connected, or indirectly connected through an intermediate medium, and it can be the internal communication of two components or the interaction relationship between two components. For those of ordinary skill in the art, the specific meanings of the above terms in the present invention can be understood according to specific situations.

[0034] In the present invention, unless otherwise clearly defined and limited, the first feature being "above" or "below" the second feature may include the direct contact between the first and second features, or may include the situation where the first and second features are not in direct contact but in contact through other features therebetween. Moreover, the first feature being "above", "above", and "on" the second feature includes that the first feature is directly above and obliquely above the second feature, or simply means that the first feature is at a higher horizontal height than the second feature. The first feature being "below", "below", and "under" the second feature includes that the first feature is directly below and obliquely below the second feature, or simply means that the first feature is at a lower horizontal height than the second feature.

[0035] In the description of this embodiment, the orientation or positional relationship such as "above", "below", "left", "right", etc. is based on the orientation or positional relationship shown in the drawings, and is only for the convenience of description and simplifying the operation, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation to the present invention. In addition, the terms "first" and "second" are only used for distinction in description and do not have special meanings.

[0036] As Figure 1 and Figure 2 shown, this embodiment provides an alcohol distillation column, which includes a liquid inlet pipe 2 and a first packing layer 3. The liquid inlet pipe 2 is used to introduce external raw materials into the distillation column body 1. The first packing layer 3 is arranged inside the distillation column body 1 and is located below the liquid outlet of the liquid inlet pipe 2. The first packing layer 3 is formed by a plurality of liquid distributors 30. The plurality of liquid distributors 30 are distributed in a pyramid structure from top to bottom. Each liquid distributor 30 is provided with a plurality of liquid outlet holes 301, and a drip sawtooth 302 is arranged at the bottom edge. Specifically, after the raw materials enter the distillation column body 1 from the liquid inlet pipe 2, they fall towards the bottom of the column, and wine vapor and water vapor are generated at the bottom of the column. The wine vapor and water vapor move upward and perform heat and mass exchange with the falling raw materials, that is, the alcohol components and aroma components are gradually enriched and concentrated. The raw materials enter the inside of the distillation column body 1 through the liquid inlet pipe 2. During the process of flowing downward from the liquid outlet of the liquid inlet pipe 2, the raw materials pass through the first packing layer 3 and are evenly distributed into the bottom of the column. Since the first packing layer 3 is in a pyramid structure, the raw materials are evenly dispersed through the layers of liquid distributors 30 and perform gas-liquid heat and mass exchange with the wine vapor, so that the alcohol components and flavor components are gradually enriched. During this process, since the liquid distributor 30 is provided with liquid outlet holes 301, the part with a relatively low concentration in the raw materials is evenly distributed downward from the liquid outlet holes 301, and the part with a relatively high concentration flows down along the surface of the liquid distributor 30. The raw materials are not easily blocked in the first packing layer 3, and there is no need to frequently replace or repair them. Moreover, they can be reused after cleaning, thereby improving production efficiency and reducing production costs; after flowing down along the surface of the liquid distributor 30, the raw materials flow evenly downward along the drip sawtooth 302, so that the raw materials passing through each layer of liquid distributor 30 are evenly distributed. After passing through multiple layers of liquid distributors 30, the distribution area of the raw materials in the distillation column reaches the maximum and is evenly distributed at the same time, maximizing the gas-liquid heat and mass exchange, thereby improving the enrichment and flavor enhancement effect of the alcohol components, improving the quality and yield of the wine; at the same time, it can also avoid the bottom of the distillation column being coked due to uneven distribution of the raw materials, thereby affecting production efficiency, damaging products or even damaging the distillation column, etc. It should be noted that the plurality of liquid distributors 30 are distributed in a pyramid structure from top to bottom, which means that in two adjacent layers of liquid distributors 30, the liquid distributor 30 in the lower layer has one more liquid distributor 30 than the liquid distributor 30 in the upper layer, and the liquid distributor 30 in the lower layer is staggered with the liquid distributor 30 in the upper layer. For example: the top liquid distributor 30 is set to one, the second layer of liquid distributors 30 is provided with two, and the top liquid distributor 30 is located in the middle of the two liquid distributors 30 in the second layer. The third layer of liquid distributors 30 is provided with three, and the two liquid distributors 30 in the second layer are respectively located between every two adjacent liquid distributors 30 in the third layer. By analogy, the number of layers of the liquid distributors 30 and the number of each layer can be selected according to needs.

[0037] Preferably, the liquid outlet of the liquid inlet pipe 2 faces downward, and a spray head 20 is provided at the liquid outlet. The spraying direction of the spray head 20 is set towards the bottom of the distillation column. The spray head 20 sprays the raw material downward, so that the raw material can be evenly scattered onto the liquid distributor 30.

[0038] Preferably, the liquid outlet holes 301 are round holes, and the liquid outlet holes 301 are evenly distributed, which is convenient for the raw material to drip downward evenly and will not cause blockage. More preferably, the diameter of the round hole ranges from 0.9 cm to 1.1 cm, and the distance between adjacent round holes ranges from 1.9 cm to 2.1 cm; the tooth height of the liquid dripping saw teeth 302 ranges from 1.9 cm to 2.1 cm, and the tooth pitch ranges from 1.9 cm to 2.1 cm. The diameter of the round hole, the distribution distance, and the tooth height and tooth pitch of the liquid dripping saw teeth 302 are interrelated. After multiple experiments, when the values are the above values, the raw material distribution effect is the best, the gas-liquid heat and mass transfer efficiency is the highest, and the output of wine and its quality are the highest. Of course, in other embodiments, the diameter of the round hole, the distribution distance, and the tooth height and tooth pitch of the liquid dripping saw teeth 302 can be designed according to the thickness of the raw material and the size of the distillation column to achieve the maximum production efficiency.

[0039] Preferably, a liquid distributor 30 with the same number as the bottom layer of the pyramid structure is further provided below the pyramid structure. Optionally, one or more layers of liquid distributors 30 below the pyramid structure are axially opposed or misaligned with the pyramid structure. In this embodiment, axial opposition is preferably adopted. When the raw material is relatively thick or there is a large amount of it, due to the limited width of the distillation column, the raw material may not be completely evenly distributed after being evenly distributed by the liquid distributor 30 of the pyramid structure. At this time, setting one or more layers of liquid distributors 30 with the same number as the bottom layer of the pyramid below the pyramid structure can ensure that the raw material is completely evenly distributed before falling into the bottom of the column, improve production efficiency, and avoid the distillation column from sticking to the bottom.

[0040] Further preferably, the top end of the liquid distributor 30 located in the lower layer is connected to the bottom edge of the liquid distributor 30 located in the lower layer. That is, there is no gap between adjacent layers of liquid distributors 30, so that the raw material can be more fully distributed on the liquid distributor 30, avoiding the raw material in the middle area from quickly passing through the liquid distributor 30 and failing to achieve the expected gas-liquid exchange purpose.

[0041] Refer to Figure 1, the liquid distributor 30 includes a diversion surface 31 and a downstream skirt 32. A plurality of the above-mentioned liquid discharge holes 301 are provided on the diversion surface 31. The downstream skirt 32 is connected to the bottom edge of the diversion surface 31. A cavity is formed between the downstream skirt 32 and the diversion surface 31. The liquid dripping serrations 302 are evenly distributed along the downstream skirt 32. Among them, the cross-sectional area of the diversion surface 31 gradually increases from top to bottom. The raw material flows downward along the top of the diversion surface 31. The raw material with a lower concentration drops from the liquid discharge holes 301, and the raw material with a higher concentration slides down naturally along the diversion surface 31 and drips evenly downward along the liquid dripping serrations 302 of the downstream skirt 32.

[0042] Specifically, the diversion skirts of the liquid distributors 30 between two adjacent ones in the same layer are seamlessly connected. This can prevent the raw material from falling through the gap between two adjacent liquid distributors 30 and being unable to disperse and distribute evenly. Optionally, the diversion surface 31 is set as a conical surface or a pyramid surface. In this embodiment, the diversion surface 31 is preferably set as a conical surface, which can make the raw material distribution uniform and adapt to the circular wall surface of the distillation column, increasing the gas-liquid heat and mass transfer area, thereby improving the quality and output of the wine.

[0043] Preferably, both the diversion surface 31 and the downstream skirt 32 are made of metal materials, making the liquid distributor 30 have high thermal conductivity, facilitating uniform heat distribution, and preventing the semi-fluid substances in the raw material from solidifying and blocking the liquid discharge holes 301. In this embodiment, both the diversion surface 31 and the downstream skirt 32 are made of copper. Copper can play a certain catalytic role under high-temperature conditions to produce some beneficial flavor components; at the same time, copper can combine with sulfur elements in the fermentation broth to fix sulfides and reduce the abnormal odor in the wine. Of course, in other embodiments, the diversion surface 31 and the downstream skirt 32 can also be made of other metal materials.

[0044] Preferably, the diversion surface 31 and the downstream skirt 32 are of an integrally formed structure, so that there is no welding point between the diversion surface 31 and the downstream skirt 32, facilitating the raw material to smoothly drop along the downstream skirt 32 from the edge of the diversion surface 31, avoiding raw material splashing, resulting in uneven distribution or splashing onto the wall surface of the distillation column and sticking to the wall surface, which affects the production efficiency.

[0045] Refer to Figure 2, the alcohol distillation column further includes a second packing layer 4, which is arranged inside the distillation column body 1 and is located above the liquid outlet of the liquid inlet pipe 2. The second packing layer 4 has a larger gas-liquid heat and mass transfer area. After the wine vapor undergoes heat and mass transfer in the first packing layer 3, it continues to enrich and concentrate the alcohol components and aroma components in the second packing layer 4 to reach the target concentration. Specifically, the second packing layer 4 includes a packing rack and packing blocks, and the packing blocks are fixedly arranged in the packing rack. The alcohol distillation column adopts the first packing layer 3 and the second packing layer 4 with different structures, enabling the raw materials to be evenly distributed and dispersed in the first packing layer 3, avoiding bottom sticking, and undergoing preliminary rectification; then rectification is carried out in the second packing layer 4 to obtain the target product.

[0046] As Figure 3 shown, this embodiment also provides an alcohol distillation system, which includes the above-mentioned alcohol distillation column. Specifically, the alcohol distillation system further includes a raw wine tank 5, a feed pump 6, and a heat exchanger 7 that are sequentially connected through pipelines. The heat exchanger 7 is connected to the side wall of the distillation column through the liquid inlet pipe 2, and the heat exchanger 7 is also connected to the bottom of the distillation column through another pipeline; more specifically, the alcohol distillation system further includes a heater 8, a top condenser 9, a reflux control valve 10, and a finished wine tank 11. The two ends of the heater 8 are respectively connected to the bottom and the side wall of the distillation column, and the outlet of the heater 8 is located below the first packing layer 3. The inlet of the top condenser 9 is connected to the top of the distillation column, and the outlet is connected to the side wall of the top of the distillation column and the finished wine tank 11 through pipelines, and a reflux control valve 10 is arranged in the outlet pipeline. The raw wine enters the distillation column from the raw wine tank 5 after being preheated by the feed pump 6 through the heat exchanger 7, and is evenly distributed to the bottom of the distillation column through the first packing layer 3. The raw materials enter the heater 8 from the bottom of the distillation column for heating. After the raw materials are heated by the heater 8, the low-boiling components evaporate into a gaseous state. The low-boiling component gas rises upward and exchanges heat and mass with the raw materials in the first packing layer 3 in the distillation column. The high-boiling components in the component gas are absorbed by the raw materials, and the low-boiling components in the raw materials are absorbed by the low-boiling component gas; the low-boiling component gas continues to rise upward through the first packing layer 3 to reach the top of the distillation column. When the temperature at the bottom of the distillation column reaches 95°C - 97°C and the temperature at the top of the distillation column reaches 79°C - 81°C, the valve of the top condenser 9 is opened, and at the same time, the reflux control valve 10 is set to reflux to the distillation column for 3 seconds every 9 seconds, and the rest of the finished products enter the finished wine tank 11; the liquid refluxed into the distillation column falls downward and exchanges heat and mass with the rising low-boiling components in the second packing layer 4 to achieve rectification. More specifically, the alcohol distillation system further includes a finished wine storage tank and a discharge pump. The finished wine storage tank is connected to the finished wine tank 11 through a pipeline, and the discharge pump is arranged in this pipeline. The products in the finished wine tank 11 are transported to the finished wine storage tank for storage through the discharge pump.

[0047] Preferably, a flow meter 14 and a feed regulating valve 13 are provided in the connecting pipeline between the heat exchanger 7 and the distillation column, for detecting the raw material flow rate and controlling the flow rate of the raw material entering the distillation column.

[0048] Furthermore, the alcohol distillation system further includes a liquid level gauge 15, a spent lees tank 17 and a spent lees regulating valve 16. The liquid level gauge 15 is arranged at the bottom of the distillation column for detecting the liquid level height in the distillation column. The spent lees tank 17 is connected to the heat exchanger 7 through a pipeline. The spent lees regulating valve 16 is arranged in the pipeline connecting the heat exchanger 7 and the bottom of the distillation column, for controlling the on-off of this pipeline. When the liquid level gauge 15 detects that the raw material liquid level in the distillation column is higher than the set value, the spent lees regulating valve 16 is opened, and the remaining spent lees enter the spent lees tank 17 via the heat exchanger 7, and can be transported to the subsequent process section through the delivery pump 18. When the spent lees pass through the heat exchanger 7, they exchange heat with the raw material, playing the role of preheating the raw material and cooling the spent lees at the same time, realizing heat recovery and utilization, and effectively reducing energy consumption; when the liquid level gauge 15 detects that the raw material liquid level in the distillation column is lower than the set value, the spent lees regulating valve 16 is closed, and the raw material is supplemented.

[0049] In this embodiment, the alcohol distillation system is automatically controlled by a distributed control system (DCS), without manual intervention. The DCS system is a new generation of instrument control system based on a microprocessor, adopting the design principle of decentralized control functions, centralized display and operation, taking into account decentralized autonomy and comprehensive coordination. It should be noted that the DCS system is a relatively mature existing technology, so it will not be elaborated here one by one.

[0050] The alcohol distillation system provided in this embodiment achieves the target finished wine through rectification of the first packing layer 3 and rectification of the second packing layer 4 for the raw material through automatic control, with relatively high production efficiency and low production cost; and the quality and output of the finished wine produced by this alcohol distillation system are relatively high.

[0051] Note that the above is only the preferred embodiment of the present invention and the applied technical principle. Those skilled in the art will understand that the present invention is not limited to the specific embodiments described here, and various obvious changes, re-adjustments and substitutions can be made by those skilled in the art without departing from the protection scope of the present invention. Therefore, although the present invention has been described in detail through the above embodiments, the present invention is not limited to the above embodiments only. Without departing from the concept of the present invention, more other equivalent embodiments can be included, and the scope of the present invention is determined by the scope of the appended claims.

Claims

1. An alcohol distillation column, comprising a distillation column body (1), characterized in that, It further includes: A feed pipe (2) for introducing external raw materials into the distillation tower body (1); A first packing layer (3) disposed inside the distillation tower body (1) and below the liquid outlet of the feed pipe (2). The first packing layer (3) is formed by a plurality of liquid distributors (30). The plurality of liquid distributors (30) are distributed in a pyramid structure from top to bottom. A plurality of liquid discharging holes (301) are provided on each liquid distributor (30), and drip sawteeth (302) are provided at the bottom edge; Wherein, the pyramid structure means that in two adjacent layers of the liquid distributors (30), the liquid distributor (30) in the lower layer has one more liquid distributor (30) than the liquid distributor (30) in the upper layer, and the liquid distributor (30) in the lower layer is staggered with the liquid distributor (30) in the upper layer; The liquid distributor (30) includes: A guiding surface (31) provided with a plurality of the liquid discharging holes (301); and A downstream skirt (32) connected to the bottom edge of the guiding surface (31). A cavity is formed between the downstream skirt (32) and the guiding surface (31). The drip sawteeth (302) are uniformly distributed along the bottom edge of the downstream skirt (32); Wherein, the cross-sectional area of the guiding surface (31) gradually increases from top to bottom; When the raw material flows downward along the top of the guiding surface (31), the raw material with a lower concentration drops from the liquid discharging holes (301), and the raw material with a higher concentration naturally slides down along the guiding surface (31) and uniformly drips downward along the drip sawteeth (302) of the downstream skirt (32); The top end of the liquid distributor (30) in the lower layer is connected to the bottom edge of the liquid distributor (30) in the upper layer.

2. The alcohol distillation column according to claim 1, wherein Below the pyramid structure, there are also provided the same number of liquid distributors (30) as the bottom layer of the pyramid structure.

3. The alcohol distillation column according to claim 1, characterized in that, The guiding surface (31) is provided as a conical surface or a pyramid surface.

4. The alcohol distillation column according to claim 1, wherein, The downstream skirts (32) of two adjacent liquid distributors (30) in the same layer are seamlessly connected.

5. The alcohol distillation column according to claim 1, characterized in that, The height of the teeth of the drip sawteeth (302) ranges from 1.9 cm to 2.1 cm, the pitch of the teeth ranges from 1.9 cm to 2.1 cm, the liquid discharging holes (301) are round holes, the diameter of the round holes ranges from 0.9 cm to 1.1 cm, and the distance between two adjacent round holes ranges from 1.9 cm to 2.1 cm.

6. The alcohol distillation column according to claim 1, characterized in that, It further includes: A second packing layer (4) disposed inside the distillation tower body (1). The second packing layer (4) is located above the liquid outlet of the feed pipe (2).

7. The alcohol distillation column according to claim 6, characterized in that, The second packing layer (4) includes a packing rack and packing blocks, and the packing blocks are fixedly arranged in the packing rack.

8. An alcohol distillation system, characterized in that, An alcohol distillation tower according to any one of claims 1-7.

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