Three-tower moving bed for extracting polyphenols from sugar cane

Abstract

The utility model discloses a three -tower formula movable bed for sugarcane polyphenol extraction relates to sugarcane polyphenol extraction technical field, include: exchange tower, its inside is equipped with macroporous resin for adsorbing the polyphenol in sugarcane molasses liquid, washing tower is linked together with exchange tower, is used for washing macroporous resin, regeneration tower is linked together with exchange tower and washing tower, is used for desorption has saturated macroporous resin, the utility model discloses through in exchange tower, macroporous resin adsorbs the polyphenol in sugarcane molasses liquid, and saturated macroporous resin after adsorption is sent into washing tower, and through the clean water washing away the sugarcane molasses liquid of saturated macroporous resin residue, and then send into regeneration tower, and through the desorption liquid desorption polyphenol in saturated macroporous resin, form the unsaturated macroporous resin, after washing, send into exchange tower, and such circulation back and forth, and exchange tower, washing tower and regeneration tower run simultaneously, realize the production of continuous extraction polyphenol, and the production efficiency is high.

Description

Technical Field

[0001] This utility model relates to the field of sugarcane polyphenol extraction technology, and in particular to a three-tower moving bed for sugarcane polyphenol extraction. Background Technology

[0002] Three-tower moving bed is widely used in the field of water treatment. It mainly consists of an exchange tower, a regeneration tower, a cleaning tower, ejectors, valves, and pipelines.

[0003] Inside the ion exchange tower, ion exchange resin undergoes an ion exchange reaction with the raw water. Calcium and magnesium ions in the water replace sodium ions in the resin, softening the hard water. The saturated resin, after exchanging with the raw water, is sent to a regeneration tower by differential pressure to undergo a replacement reaction with brine, regenerating into new resin. The regenerated resin is then cleaned in a washing tower and returned to the ion exchange tower by an ejector. This cycle is repeated continuously to achieve the production of softened water, offering advantages such as low energy consumption and high production efficiency.

[0004] Existing methods for extracting polyphenols from sugarcane typically involve using a fixed-bed macroporous resin to adsorb polyphenols from sugarcane molasses solution. However, once the macroporous resin becomes saturated, it needs to be desorbed to form unsaturated macroporous resin for recycling. But desorbing from the saturated macroporous resin requires stopping the adsorption of polyphenols, thus preventing continuous production and resulting in low efficiency. Utility Model Content

[0005] In order to overcome at least one of the defects of the prior art, the present invention provides a three-tower moving bed for sugarcane polyphenol extraction, so as to solve the problems of non-continuous production and low production efficiency in polyphenol extraction.

[0006] The technical solution adopted by this utility model to solve its problem is: A three-tower moving bed for extracting sugarcane polyphenols, comprising: The exchange tower contains macroporous resin for adsorbing polyphenols in sugarcane molasses solution. A cleaning tower, which is connected to an exchange tower, is used to clean macroporous resin; The regeneration tower, which is connected to the exchange tower and the washing tower, is used to desorb saturated macroporous resin.

[0007] The above scheme involves macroporous resin adsorbing polyphenols from sugarcane molasses in an exchange tower. The saturated macroporous resin after adsorption is then sent to a washing tower to wash away any residual sugarcane molasses in the resin with clean water. The resin is then sent to a regeneration tower where polyphenols are desorbed by an desorption solution, forming unsaturated macroporous resin. After washing, the resin is sent back to the exchange tower. This process is repeated to achieve continuous polyphenol extraction with high production efficiency.

[0008] Furthermore, the upper end of the exchange tower is provided with an exchange grease inlet, the lower end of the exchange tower is provided with an exchange grease outlet, the upper end of the cleaning tower is provided with a cleaning grease inlet, the lower end of the cleaning tower is provided with a cleaning grease outlet, and the exchange grease outlet is connected to the cleaning grease inlet through a first resin pipe.

[0009] Through the above-mentioned further scheme, the saturated macroporous resin in the exchange tower is transported to the cleaning tower through the first resin pipeline to clean the residual sugarcane molasses on the saturated macroporous resin.

[0010] Furthermore, the regeneration tower is provided with a regeneration grease inlet at the upper end and a regeneration grease outlet at the lower end. The cleaning grease outlet is connected to the regeneration grease inlet through a second resin pipe, and the regeneration grease outlet is connected to the exchange grease inlet through a third resin pipe.

[0011] Through the above-mentioned further scheme, the saturated macroporous resin after cleaning in the cleaning tower is transported to the regeneration tower through the second resin pipeline. In the regeneration tower, the saturated macroporous resin is desorbed into unsaturated macroporous resin, so that the unsaturated macroporous resin can be recycled.

[0012] Furthermore, the exchange grease inlet is connected to a flange at one end of the third resin pipe, the regeneration grease outlet is connected to a flange at the other end of the third resin pipe, the regeneration grease inlet is connected to a flange at one end of the second resin pipe, the cleaning grease outlet is connected to a flange at the other end of the second resin pipe, the cleaning grease inlet is connected to a flange at one end of the first resin pipe, and the exchange grease outlet is connected to a flange at the other end of the first resin pipe.

[0013] The above-mentioned further solutions, using flange connections, ensure high connection strength and good sealing between the tower and the pipeline, facilitating disassembly, assembly, and maintenance.

[0014] Furthermore, the exchange tower is provided with an inlet and an outlet, with the inlet located at the lower end of the exchange tower and the outlet located at the upper end of the exchange tower.

[0015] Through the above-mentioned further scheme, the sugarcane molasses liquid is sent into the exchange tower through the inlet, so that the unsaturated macroporous resin in the exchange tower adsorbs the polyphenols in the sugarcane molasses liquid, turning the unsaturated macroporous resin into a saturated macroporous resin, and the adsorbed sugarcane molasses liquid flows out from the outlet.

[0016] Furthermore, the cleaning tower is provided with an inlet and an outlet, with the inlet located at the lower end of the cleaning tower and the outlet located at the upper end of the cleaning tower.

[0017] The above-mentioned further method involves sending clean water into the cleaning tower through the inlet to clean the saturated macroporous resin containing residual sugarcane molasses in the cleaning tower, and then discharging the cleaned water through the outlet.

[0018] Furthermore, the regeneration tower is equipped with an inlet pipe, an outlet pipe, a liquid inlet pipe, and a liquid outlet pipe. The inlet pipe and the liquid inlet pipe are located at the lower end of the regeneration tower, and the outlet pipe and the liquid outlet pipe are located at the upper end of the regeneration tower. The liquid inlet pipe is used to transport desorption liquid for desorbing saturated macroporous resin into the regeneration tower.

[0019] Through the above-mentioned further scheme, the desorbed liquid is transported to the regeneration tower through the inlet pipe to desorb the saturated macroporous resin in the regeneration tower, release the polyphenols, and turn the saturated macroporous resin into unsaturated macroporous resin. The polyphenols and the desorbed liquid flow out together through the outlet pipe. Clean water is delivered to the regeneration tower through the inlet pipe to clean the saturated macroporous resin inside the regeneration tower, removing any residual desorption liquid from the macroporous resin. The cleaned water is then discharged through the outlet pipe.

[0020] Furthermore, the regeneration tower is equipped with an alkali inlet pipe, an alkali outlet pipe, an acid inlet pipe, and an acid outlet pipe. The alkali inlet pipe and the acid inlet pipe are located at the lower end of the regeneration tower, while the water outlet pipe, the alkali outlet pipe, and the acid outlet pipe are located at the upper end of the regeneration tower.

[0021] Through the above-mentioned further scheme, alkaline water is transported to the regeneration tower through the alkali inlet pipe to perform alkali washing on the saturated macroporous resin in the regeneration tower, and the washed alkaline water is discharged through the alkali outlet pipe. Clean water is transported into the regeneration tower through the inlet pipe to clean the saturated macroporous resin in the regeneration tower, removing the residual alkaline water from the macroporous resin, and the cleaned water is discharged through the outlet pipe. Acid water is transported to the regeneration tower through the acid inlet pipe to acid wash the saturated macroporous resin in the regeneration tower, and the acid water after washing is discharged through the acid outlet pipe. Clean water is transported to the regeneration tower through the inlet pipe to clean the saturated macroporous resin inside the regeneration tower, removing any residual acid water from the macroporous resin. The cleaned water is then discharged through the outlet pipe.

[0022] Furthermore, the liquid level in the exchange tower is higher than the top height of the cleaning tower, the liquid level in the cleaning tower is higher than the top height of the regeneration tower, and an ejector is provided on the third resin pipe.

[0023] Through the above-mentioned further scheme, in the exchange tower, the macroporous resin adsorbs the polyphenols in the sugarcane molasses solution. The saturated macroporous resin after adsorption is sent to the washing tower by differential pressure. The sugarcane molasses solution remaining in the saturated macroporous resin is washed away by clean water. Then, it is sent to the regeneration tower by differential pressure. The polyphenols in the saturated macroporous resin are desorbed by the desorption liquid to form unsaturated macroporous resin. After washing, it is sent to the exchange tower through an ejector. This cycle is repeated.

[0024] Compared with the prior art, the beneficial effects of this utility model are: Inside the exchange tower, macroporous resin adsorbs polyphenols from sugarcane molasses solution. The saturated macroporous resin after adsorption is sent to the washing tower to wash away the residual sugarcane molasses solution. Then it is sent to the regeneration tower to desorb the polyphenols from the saturated macroporous resin with desorption liquid, forming unsaturated macroporous resin. After washing, it is sent back to the exchange tower. This cycle is repeated. The exchange tower, washing tower and regeneration tower operate simultaneously to achieve continuous extraction of polyphenols with high production efficiency. Attached Figure Description

[0025] To more clearly illustrate the technical solutions of the embodiments of this utility model, the accompanying drawings used in the description of the embodiments will be briefly introduced below.

[0026] Figure 1 This is a schematic diagram of the overall structure of this utility model; Figure 2 This is a schematic diagram of the regeneration tower structure of this utility model.

[0027] In the diagram: 1. Exchange tower; 11. Exchange grease inlet; 12. Exchange grease outlet; 13. Liquid inlet; 14. Liquid outlet; 2. Cleaning tower; 21. Cleaning grease inlet; 22. Cleaning grease outlet; 23. Water inlet; 24. Water outlet; 3. Regeneration tower; 31. Regeneration grease inlet; 32. Regeneration grease outlet; 33. Water inlet pipe; 34. Water outlet pipe; 35. Liquid inlet pipe; 36. Liquid outlet pipe; 37. Alkali inlet pipe; 38. Alkali outlet pipe; 39. Acid inlet pipe; 30. Acid outlet pipe; 4. First resin pipe; 5. Second resin pipe; 6. Third resin pipe; 61. Ejector. Detailed Implementation

[0028] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. All other embodiments obtained by those skilled in the art based on the embodiments of the present utility model without creative effort are within the scope of protection of the present utility model.

[0029] In the description of this utility model, it should be noted that the terms "center," "upper," "lower," "left," "right," "vertical," "horizontal," "inner," and "outer," etc., indicating the orientation or positional relationship, are based on the orientation or positional relationship shown in the accompanying drawings and are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element 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 utility model. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0030] In the description of this utility model, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "joining" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances. Furthermore, the technical features involved in the different embodiments of this utility model described below can be combined with each other as long as they do not conflict with each other.

[0031] Example 1: refer to Figures 1-2 As shown, a three-tower moving bed for sugarcane polyphenol extraction includes an exchange tower 1, a washing tower 2, and a regeneration tower 3. The exchange tower 1 contains macroporous resin for adsorbing polyphenols from sugarcane molasses solution. The washing tower 2 is connected to the exchange tower 1 and is used to wash the macroporous resin. The regeneration tower 3 is connected to both the exchange tower 1 and the washing tower 2 and is used to desorb the saturated macroporous resin, forming unsaturated macroporous resin, which is then transported back to the exchange tower 1. In the exchange tower 1, the macroporous resin adsorbs polyphenols from the sugarcane molasses solution. The saturated macroporous resin after adsorption is sent to the washing tower 2 by differential pressure, where the residual sugarcane molasses solution is washed away with water. Then, it is sent to the regeneration tower 3 by differential pressure, where the polyphenols in the saturated macroporous resin are desorbed by desorption liquid, forming unsaturated macroporous resin, which is then washed and sent back to the exchange tower 1. This cycle is repeated to achieve continuous polyphenol extraction with high production efficiency.

[0032] It should be noted that the principle of macroporous resin adsorption of polyphenols is as follows: macroporous resin has a three-dimensional network structure with specific pore sizes. When the size of sugarcane polyphenol molecules in sugarcane molasses matches the pore size of the resin, they can enter the pores, contact the functional groups, and interact with them to be adsorbed. Meanwhile, large molecular impurities (such as polysaccharides and proteins) are repelled because they are too large.

[0033] The exchange tower 1 has an exchange inlet 11 at its upper end and an exchange outlet 12 at its lower end. The cleaning tower 2 has a cleaning inlet 21 at its upper end and a cleaning outlet 22 at its lower end. The exchange outlet 12 is connected to the cleaning inlet 21 via a first resin pipe 4. The regeneration tower 3 has a regeneration inlet 31 at its upper end and a regeneration outlet 32 ​​at its lower end. The cleaning outlet 22 is connected to the regeneration inlet 31 via a second resin pipe 5 and to the exchange inlet 11 via a third resin pipe 6. The saturated macroporous resin in the exchange tower 1 is transported to the cleaning tower 2 via the first resin pipe 4 to clean the residual sugarcane molasses on the saturated macroporous resin. The cleaned saturated macroporous resin in the cleaning tower 2 is then transported to the regeneration tower 3 via the second resin pipe 5. In the regeneration tower 3, the saturated macroporous resin is desorbed into unsaturated macroporous resin, which is then transported back to the exchange tower 1 via the third resin pipe 6, allowing the macroporous resin to be recycled.

[0034] In this system, the liquid level in exchange tower 1 is higher than the top level of washing tower 2, and the liquid level in washing tower 2 is higher than the top level of regeneration tower 3. An ejector 61 is installed on the third resin pipe 6. In exchange tower 1, macroporous resin adsorbs polyphenols from sugarcane molasses liquid. The saturated macroporous resin after adsorption is sent to washing tower 2 by differential pressure. The residual sugarcane molasses liquid in the saturated macroporous resin is washed away by clean water. Then, it is sent to regeneration tower 3 by differential pressure. The polyphenols in the saturated macroporous resin are desorbed by desorption liquid to form unsaturated macroporous resin. After washing, it is sent back to exchange tower 1 through ejector 61. This cycle is repeated. Only one ejector 61 is needed to complete the flow of macroporous resin. The operation is simple and the energy consumption is low.

[0035] The exchange grease inlet 11 is connected to one flange of the third resin pipe 6, the regeneration grease outlet 32 ​​is connected to the other flange of the third resin pipe 6, the regeneration grease inlet 31 is connected to one flange of the second resin pipe 5, the cleaning grease outlet 22 is connected to the other flange of the second resin pipe 5, the cleaning grease inlet 21 is connected to one flange of the first resin pipe 4, and the exchange grease outlet 12 is connected to the other flange of the first resin pipe 4. The flange connection ensures high connection strength and good sealing between the tower and the pipe, facilitating disassembly, assembly, and maintenance.

[0036] The exchange tower 1 is provided with an inlet 13 and an outlet 14. The inlet 13 is located at the lower end of the exchange tower 1, and the outlet 14 is located at the upper end of the exchange tower 1. Sugarcane molasses liquor is sent into the exchange tower 1 through the inlet 13, so that the unsaturated macroporous resin in the exchange tower 1 adsorbs the polyphenols in the sugarcane molasses liquor, turning the unsaturated macroporous resin into a saturated macroporous resin. The adsorbed sugarcane molasses liquor flows out from the outlet 14.

[0037] The cleaning tower 2 is equipped with an inlet 23 and an outlet 24. The inlet 23 is located at the lower end of the cleaning tower 2, and the outlet 24 is located at the upper end of the cleaning tower 2. Clean water is sent into the cleaning tower 2 through the inlet 23 to clean the saturated macroporous resin in the cleaning tower 2 that contains residual sugarcane molasses solution. The cleaned water is discharged through the outlet 24.

[0038] The regeneration tower 3 is equipped with an inlet pipe 33, an outlet pipe 34, a liquid inlet pipe 35, and a liquid outlet pipe 36. The inlet pipe 33 and the liquid inlet pipe 35 are located at the lower end of the regeneration tower 3, and the outlet pipe 34 and the liquid outlet pipe 36 are located at the upper end of the regeneration tower 3. The desorption liquid for desorbing the saturated macroporous resin is transported into the regeneration tower 3 through the liquid inlet pipe 35. The desorbed liquid is transported to the regeneration tower 3 through the inlet pipe 35 to desorb the saturated macroporous resin in the regeneration tower 3 and release the polyphenols. The polyphenols and the desorbed liquid flow out through the outlet pipe 36 together and are then evaporated by alcohol in the subsequent process to obtain polyphenol solution. Clean water is transported to the regeneration tower 3 through the inlet pipe 33 to clean the unsaturated macroporous resin in the regeneration tower 3, removing the residual desorption liquid from the unsaturated macroporous resin. The cleaned water is then discharged through the outlet pipe 34, resulting in clean unsaturated macroporous resin, which can then be used for the next round of adsorption.

[0039] The desorption solution is an ethanol solution.

[0040] Desorption refers to the process of releasing polyphenols from the pores of a saturated macroporous resin (a resin that has been fully adsorbed with polyphenols).

[0041] Example 2: refer to Figures 1-2 As shown, based on Example 1, the regeneration tower 3 is also equipped with an alkali inlet pipe 37, an alkali outlet pipe 38, an acid inlet pipe 39, and an acid outlet pipe 30. The alkali inlet pipe 37 and the acid inlet pipe 39 are located at the lower end of the regeneration tower 3, and the alkali outlet pipe 38 and the acid outlet pipe 30 are located at the upper end of the regeneration tower 3.

[0042] Macroporous resins are generally regenerated once every 0.5 to 1 year, depending on usage.

[0043] When macroporous resin needs to be regenerated, the regeneration process is as follows: alkaline wash (NaOH) → water wash → acid wash (HCl) → water wash → ethanol activation → water wash.

[0044] Alkali water is transported to regeneration tower 3 through alkali inlet pipe 37 to wash the macroporous resin in regeneration tower 3, and the washed alkali water is discharged through alkali outlet pipe 38. Clean water is transported to the regeneration tower 3 through the inlet pipe 33 to clean the macroporous resin in the regeneration tower 3, and to clean the residual alkaline water on the macroporous resin. The cleaned water is discharged through the outlet pipe 34. Acid water is transported to regeneration tower 3 through acid inlet pipe 39 to acid wash the macroporous resin in regeneration tower 3, and the acid water after washing is discharged through acid outlet pipe 30. Clean water is transported to the regeneration tower 3 through the inlet pipe 33 to clean the macroporous resin in the regeneration tower 3, and to clean the residual acid water on the macroporous resin. The cleaned water is discharged through the outlet pipe 34. The ethanol solution is delivered to the regeneration tower 3 through the inlet pipe 35 to activate the macroporous resin in the regeneration tower 3. Clean water is transported to the regeneration tower 3 through the inlet pipe 33 to clean the macroporous resin in the regeneration tower 3, removing the residual ethanol solution from the macroporous resin. The cleaned water is then discharged through the outlet pipe 34, resulting in clean unsaturated macroporous resin.

[0045] The purpose of regeneration is as follows: Remove adsorption residue: Remove residual polyphenols, sugars, pigments and other organic matter from the resin channels; Restoring adsorption capacity: Restoring the pore structure and surface active sites of the resin; Extend service life: Prevent the resin from permanently failing due to contamination or swelling.

[0046] It should be noted that the water in question is soft water.

[0047] It should be noted that the ethanol solution and the desorption solution have the same substance and concentration, so they are both added through the inlet tube 35 and discharged through the outlet tube 36. The different names are used here only to distinguish their different functions.

[0048] The working principle of this utility model is as follows: Unsaturated macroporous resin is placed inside exchange tower 1; Sugarcane molasses solution is fed into the lower part of the exchange tower 1 through the inlet 13 at the bottom. The sugarcane molasses solution flows upward, causing the unsaturated macroporous resin in the exchange tower 1 to adsorb the polyphenols in the sugarcane molasses solution, turning the unsaturated macroporous resin into a saturated macroporous resin. The adsorbed sugarcane molasses solution flows out from the outlet 14 at the top of the exchange tower 1, so that the unsaturated macroporous resin in the exchange tower 1 becomes saturated from the bottom first. Saturated macroporous resin flows out through the grease outlet 12 at the lower end of the exchange tower 1, and is sent into the cleaning tower 2 through the cleaning grease inlet 21 at the upper end of the cleaning tower 2 by the first resin pipeline 4 through the differential pressure. Clean water is sent into the bottom of the cleaning tower 2 through the water inlet 23 at the bottom of the cleaning tower 2 to clean the saturated macroporous resin in the cleaning tower 2 that contains residual sugarcane molasses solution. The clean water is discharged through the water outlet 24 at the top of the cleaning tower 2, so that the clean water cleans the saturated macroporous resin from bottom to top. The cleaned saturated macroporous resin flows out through the cleaning outlet 22 at the lower end of the cleaning tower 2, and is sent into the regeneration tower 3 through the regeneration inlet 31 at the upper end of the regeneration tower 3 by the second resin pipeline 5 through the differential pressure. The desorption liquid is sent into the bottom of the regeneration tower 3 through the inlet pipe 35 at the lower end of the regeneration tower 3 to desorb the saturated macroporous resin in the regeneration tower 3, release the polyphenols, and turn the saturated macroporous resin into unsaturated macroporous resin. The polyphenols and the desorption liquid flow out together through the outlet pipe 36 at the upper end of the regeneration tower 3. After the subsequent alcohol evaporation process, polyphenol solution is obtained, so that the desorption liquid desorbs the saturated macroporous resin from bottom to top. Clean water is introduced into the bottom of the regeneration tower 3 through the water inlet pipe 33 at the lower end of the regeneration tower 3 to clean the saturated macroporous resin in the regeneration tower 3, and to clean the residual desorption liquid on the saturated macroporous resin. The cleaned water is discharged through the water outlet pipe 34 at the upper end of the regeneration tower 3, so that the clean water cleans the saturated macroporous resin from bottom to top and obtains clean unsaturated macroporous resin. Clean unsaturated macroporous resin flows out through the regeneration outlet 32 ​​at the lower end of the regeneration tower 3, and is fed into the exchange tower 1 through the exchange inlet 11 at the upper end of the exchange tower 1 via the third resin pipe 6 and the injector 61, and is piled on top of the original macroporous resin in the exchange tower 1.

[0049] When macroporous resin needs to be regenerated: After obtaining clean, unsaturated macroporous resin; Alkali water is fed into the bottom of the regeneration tower 3 through the alkali inlet pipe 37 at the bottom of the regeneration tower 3 to wash the macroporous resin in the regeneration tower 3. The washed alkali water is discharged through the alkali outlet pipe 38 at the top of the regeneration tower 3, so that the alkali water washes the macroporous resin from bottom to top. Clean water is sent into the bottom of the regeneration tower 3 through the water inlet pipe 33 at the bottom of the regeneration tower 3 to clean the macroporous resin in the regeneration tower 3 and remove the residual alkaline water on the macroporous resin. The cleaned water is discharged through the water outlet pipe 34 at the top of the regeneration tower 3, so that the clean water cleans the macroporous resin with alkaline water from bottom to top. Acid water is sent into the bottom of the regeneration tower 3 through the acid inlet pipe 39 at the lower end of the regeneration tower 3 to acid wash the macroporous resin in the regeneration tower 3. The acid water after washing is discharged through the acid outlet pipe 30 at the upper end of the regeneration tower 3, so that the acid water acid washes the macroporous resin from bottom to top. Clean water is sent into the bottom of the regeneration tower 3 through the water inlet pipe 33 at the bottom of the regeneration tower 3 to clean the macroporous resin in the regeneration tower 3 and remove the acid water remaining on the macroporous resin. The cleaned water is discharged through the water outlet pipe 34 at the top of the regeneration tower 3, so that the clean water cleans the macroporous resin with acid water from bottom to top. Ethanol solution is fed into the bottom of regeneration tower 3 through inlet pipe 35 at the lower end of regeneration tower 3 to activate the macroporous resin in regeneration tower 3, so that the ethanol solution activates the macroporous resin from bottom to top. Clean water is introduced into the bottom of the regeneration tower 3 through the water inlet pipe 33 at the lower end of the regeneration tower 3 to clean the macroporous resin containing ethanol solution in the regeneration tower 3, and to clean the residual ethanol solution on the macroporous resin. The cleaned water is discharged through the water outlet pipe 34 at the upper end of the regeneration tower 3, so that the clean water cleans the macroporous resin containing ethanol solution from bottom to top, and obtains clean regenerated unsaturated macroporous resin. Clean, regenerated unsaturated macroporous resin flows out through the regeneration outlet 32 ​​at the bottom of the regeneration tower 3, and is fed into the exchange tower 1 through the exchange inlet 11 at the top of the exchange tower 1 via the third resin pipe 6 and the ejector 61, and piled on top of the original macroporous resin in the exchange tower 1. Based on the amount of macroporous resin in exchange tower 1 and the amount of macroporous resin regenerated in a single cycle, the required number of regeneration cycles is determined. By repeating the above process, the macroporous resin in exchange tower 1 is regenerated, extending the service life of the macroporous resin.

[0050] The above description is merely a specific embodiment of this utility model, but the protection scope of this utility model is not limited thereto. Any variations or substitutions that can be easily conceived by those skilled in the art within the technical scope disclosed in this utility model should be included within the protection scope of this utility model. Therefore, the protection scope of this utility model should be determined by the protection scope of the claims.

Claims

1. A three-tower moving bed for extracting sugarcane polyphenols, characterized in that, include: An exchange tower (1) is provided with macroporous resin for adsorbing polyphenols in sugarcane molasses liquid; The cleaning tower (2), which is connected to the exchange tower (1), is used to clean the macroporous resin; The regeneration tower (3), which is connected to the exchange tower (1) and the washing tower (2), is used to desorb the saturated macroporous resin.

2. The three-tower moving bed for extracting sugarcane polyphenols according to claim 1, characterized in that: The exchange tower (1) is provided with an exchange grease inlet (11) at the upper end and an exchange grease outlet (12) at the lower end. The cleaning tower (2) is provided with a cleaning grease inlet (21) at the upper end and a cleaning grease outlet (22) at the lower end. The exchange grease outlet (12) is connected to the cleaning grease inlet (21) through a first resin pipe (4).

3. A three-tower moving bed for extracting sugarcane polyphenols according to claim 2, characterized in that: The regeneration tower (3) is provided with a regeneration grease inlet (31) at the upper end and a regeneration grease outlet (32) at the lower end. The cleaning grease outlet (22) is connected to the regeneration grease inlet (31) through a second resin pipe (5), and the regeneration grease outlet (32) is connected to the exchange grease inlet (11) through a third resin pipe (6).

4. A three-tower moving bed for extracting sugarcane polyphenols according to claim 3, characterized in that: The exchange grease inlet (11) is connected to one flange of the third resin pipe (6), the regeneration grease outlet (32) is connected to the other flange of the third resin pipe (6), the regeneration grease inlet (31) is connected to one flange of the second resin pipe (5), the cleaning grease outlet (22) is connected to the other flange of the second resin pipe (5), the cleaning grease inlet (21) is connected to one flange of the first resin pipe (4), and the exchange grease outlet (12) is connected to the other flange of the first resin pipe (4).

5. A three-tower moving bed for extracting sugarcane polyphenols according to claim 1, characterized in that: The exchange tower (1) is provided with an inlet (13) and an outlet (14). The inlet (13) is located at the lower end of the exchange tower (1), and the outlet (14) is located at the upper end of the exchange tower (1).

6. A three-tower moving bed for extracting sugarcane polyphenols according to claim 1, characterized in that: The cleaning tower (2) is provided with an inlet (23) and an outlet (24). The inlet (23) is located at the lower end of the cleaning tower (2), and the outlet (24) is located at the upper end of the cleaning tower (2).

7. A three-tower moving bed for extracting sugarcane polyphenols according to claim 1, characterized in that: The regeneration tower (3) is equipped with an inlet pipe (33), an outlet pipe (34), a liquid inlet pipe (35), and a liquid outlet pipe (36). The inlet pipe (33) and the liquid inlet pipe (35) are located at the lower end of the regeneration tower (3), and the outlet pipe (34) and the liquid outlet pipe (36) are located at the upper end of the regeneration tower (3). The liquid inlet pipe (35) is used to transport the desorption liquid for desorbing the saturated macroporous resin into the regeneration tower (3).

8. A three-tower moving bed for extracting sugarcane polyphenols according to claim 7, characterized in that: The regeneration tower (3) is equipped with an alkali inlet pipe (37), an alkali outlet pipe (38), an acid inlet pipe (39), and an acid outlet pipe (30). The alkali inlet pipe (37) and the acid inlet pipe (39) are located at the lower end of the regeneration tower (3), while the water outlet pipe (34), the alkali outlet pipe (38), and the acid outlet pipe (30) are located at the upper end of the regeneration tower (3).

9. A three-tower moving bed for extracting sugarcane polyphenols according to claim 3, characterized in that: The liquid level in the exchange tower (1) is higher than the top height of the cleaning tower (2), the liquid level in the cleaning tower (2) is higher than the top height of the regeneration tower (3), and an ejector (61) is provided on the third resin pipe (6).

Images