JPH08173705A - Decoloration-refining of saccharic liquid and device thereof - Google Patents

Abstract

PURPOSE: To reduce the consumption of a regenerating agent significantly and save maintenance cost by extracting an ion exchange resin from the inner lower layer of a refining tower, regenerating only a residual ion exchange resin in the tower, and using a transported ion exchange resin as it is together with the regenerated ion exchange resin for the decoloration and refining of a saccharic liquid. CONSTITUTION: In the decoloration and refining of the saccharic liquid, first, a saccharic liquid is decolored and refined with a concurrent action to cause the saccharic liquid to come into contact with a layer 31 filled with an ion exchange resin in a refining tower 32, and the ion exchange resin is regenerated. When regenerating the ion exchange resin, the ion exchange resin 31A is extracted from the lower layer of the layer 31 and is transported to the inner top of the refining tower 32 to laminate the resin 31A to a residual ion exchange resin 31B in the upper layer. In addition, the residual ion exchange resin 31B in the refining tower 32 is regenerated, and the transported ion exchange resin 31A is used as it is together with the regenerated ion exchange resin 31B for the decoloration and refining of the saccharic liquid.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method for decolorizing and refining a sugar solution and an apparatus for decolorizing and refining a sugar solution, and more specifically to a method and a method for decolorizing and refining a sugar solution capable of reducing the amount of a regenerant for an ion exchange resin. The present invention relates to a decolorizing and refining device for liquids.

[0002]

2. Description of the Related Art Conventionally, in the case of decolorizing and refining a sugar solution, for example, calcium hydroxide and carbon dioxide gas are supplied to the raw sugar solution to form fine calcium carbonate in the raw sugar solution. The raw sugar solution is roughly purified by a method of adsorbing a coloring component or the like on the surface of soybeans, a method by so-called carbonation, or a method of adsorbing and filtering the coloring component with particulate activated carbon or bone charcoal as a filtering material. afterwards,
A small amount of coloring components and ionic components that cannot be removed by the above-mentioned treatment methods are subjected to decolorization purification and desalting of the sugar solution using an ion exchange resin.

By the way, for the ion exchange treatment mainly for decolorizing the sugar solution, for example, a purification tower filled with a Cl type strongly basic anion exchange resin (hereinafter simply referred to as "anion exchange resin") is industrial. The sugar solution is passed through the strongly basic anion exchange resin layer in the purification column to decolorize and refine the sugar solution. There are various industrial decolorization purification methods, for example, a single-column method using one purification column and a merry-go-round method using a plurality of purification columns connected in series are known. Since the former method is simple in terms of equipment, it is widely used industrially,
The latter method is complicated in terms of equipment, and requires a plurality of purification towers to be maintained, resulting in a high total cost including initial costs and maintenance costs.

Therefore, a conventional single-column type decolorizing and refining apparatus for sugar solution will be described. When decolorizing and refining a sugar solution using a conventional single column decolorizing and refining apparatus, the sugar solution is passed through a single refining tower filled with a strongly basic anion exchange resin as described above, While the sugar liquid flows down in contact with the strongly basic anion exchange resin, the coloring component in the sugar liquid is adsorbed on the anion exchange resin, whereby the sugar liquid is decolorized and purified.

[0005]

However, in the case of the decolorizing and refining method using the conventional single-column type sugar solution decolorizing and refining apparatus, when the anion exchange resin is regenerated, salt (NaC) is used.
l) The ion exchange resin is regenerated by passing a regenerant solution such as water through a packed bed of anion exchange resin in the purification tower. For this regeneration, the packed bed in the purification tower is entirely saline solution. Since it is regenerated with a regenerant solution, there is a problem that a large amount of regenerant solution is used and the running cost is high. Further, when the anion exchange resin is regenerated as described above, there is a problem that the operation efficiency of the apparatus is reduced because the decolorizing and refining apparatus must be regenerated in a stopped state.

In the case of the conventional method for decolorizing and refining a sugar solution and the decolorizing and refining apparatus for a sugar solution, water is passed through the refining tower to replace the sugar solution in the refining tower with water before regenerating the anion exchange resin. However, so-called sweetening off is performed to remove sugar. However, this sweetening off causes a large amount of sugar solution dilution water (sweet water), which causes a problem that the cost of recovering the sugar solution from the sweet water is high. It was

The present invention has been made to solve the above problems, and provides a method for decolorizing and refining a sugar solution capable of significantly reducing the amount of regenerant used and significantly reducing the maintenance cost, and at the same time, the sweetener It is an object of the present invention to provide a decolorizing and refining method for a sugar solution, which can significantly reduce the amount of the generated sugar solution and significantly reduce the cost for recovering the sugar solution. Further, the present invention can drastically reduce the amount of the regenerant used to significantly reduce the maintenance cost, and continuously regenerate the ion exchange resin and decolorize and refine the sugar solution in parallel without stopping the apparatus. It is an object of the present invention to provide a decolorizing and purifying method for a sugar solution and a decolorizing and purifying apparatus for a sugar solution which can be performed.

[0008]

DISCLOSURE OF THE INVENTION The present inventors have studied the state of the ion-exchange resin layer in the purification tower in order to solve the above-mentioned problems of the conventional decolorization and purification method for sugar solution and decolorization and purification apparatus for sugar solution. As a result of various studies, in the packed bed of the ion exchange resin at the regeneration stage where the decolorization treatment of the sugar solution has been completed, the adsorption performance of the ion exchange resin in the upper layer is lowered due to the adsorption of the dye component. It has been found that the ion exchange resin hardly adsorbs and that the ion exchange resin can be reused as it is.

The present invention was made on the basis of the above-mentioned findings. The invention according to claim 1 of the present invention is to make a sugar liquid flow down while contacting it with a packed bed of an ion exchange resin in a purification tower. In the method for decolorizing and refining a sugar solution, which comprises regenerating the ion-exchange resin after decolorizing and purifying the ion-exchange resin, the ion-exchange resin in the lower layer of the packed bed is extracted when the ion-exchange resin is regenerated. After being transferred to the upper part of the above and laminated on the residual packed bed, the residual ion exchange resin in the purification column is regenerated, and then the transferred ion exchange resin is used as it is along with the ion exchange resin after regeneration. The above object has been achieved by providing a method for decolorizing and refining a sugar solution used for decolorizing and refining a solution.

The invention according to claim 2 of the present invention is
In the method for decolorizing and purifying a sugar solution, the sugar solution is allowed to flow down while contacting the packed bed of the ion exchange resin in the purification tower to decolorize and refine the sugar solution. When the layer is regenerated, the ion exchange resin in the lower layer of the packed bed is extracted and transferred to a storage tank outside the purification column, and then, after the remaining ion exchange resin in the purification column is regenerated. , The ion exchange resin in the storage tank is transferred onto the regenerated ion exchange resin layer, and the transferred ion exchange resin is used together with the regenerated ion exchange resin for decolorization purification of the sugar solution It provides a method.

The invention according to claim 3 of the present invention is
The sugar solution is supplied to the packed beds of the ion exchange resin in the plurality of purification towers with a time lag, and the sugar solution is decolorized and purified in each of the purification towers. A method for decolorizing and refining a sugar solution for regenerating, wherein, when regenerating an ion-exchange resin in a purification tower to which sugar solution has been previously supplied, a lower layer of a packed bed in the purification tower Of the ion-exchange resin is extracted and transferred to the packed bed in the other one of the purification columns that have already been regenerated to replenish the ion-exchange resin, and then decolorization purification of the sugar solution is performed in this purification column, In the purification tower to which the ion exchange resin has been transferred, the remaining ion exchange resin is regenerated, and one purification tower is used for regeneration of the ion exchange resin and the other purification tower is continuously circulated for decolorization purification. It provides a method for decolorizing and purifying liquids. That.

The invention according to claim 4 of the present invention is
In the invention according to any one of claims 1 to 3, there is provided a method for decolorizing and refining a sugar solution, wherein the ion exchange resin is a strongly basic anion exchange resin.

The invention according to claim 5 of the present invention is
The sugar solution is supplied to the packed beds of the ion exchange resin in the plurality of purification towers with a time lag, and the sugar solution is decolorized and purified in each of the purification towers. An apparatus for decolorizing and refining a sugar solution for regeneration, which is an ion-exchange resin transfer means for individually extracting the ion-exchange resin in the lower layer of the packed bed in each of the above-mentioned purification towers and transferring it individually to the upper portion in another purification tower. A regenerant supply means for supplying a regenerant to the remaining ion exchange resin after the ion exchange resin is transferred by the ion exchange resin transfer means, and a control means for driving and controlling these means. Among the above-mentioned plurality of purification towers, when regenerating the ion exchange resin in the purification tower previously supplied with the sugar solution, the ion exchange resin in the lower layer of the packed bed in the purification tower has already been extracted. Playback is complete After transferring to the packed bed in one purification tower and replenishing the ion exchange resin, decolorization purification is performed in this purification tower, and the remaining ion exchange resin is regenerated in the purification tower to which the ion exchange resin has been transferred. The present invention provides a decolorizing and refining apparatus for sugar solution in which one refining tower is used for regeneration and the other refining tower is continuously recycled for decolorizing and refining.

[0014]

According to the first aspect of the present invention, the sugar solution is supplied into the purification tower, and the deionized purification of the sugar solution is performed by the packed bed of the ion exchange resin in the purification tower. When regenerating the ion-exchange resin in the purification tower, the ion-exchange resin in the lower layer of the packed bed in the purification tower is extracted and transferred to the remaining packed bed in the purification tower to stack the ion-exchange resin to the original layer. The amount of ion exchange resin in the purification column is secured, and then the remaining ion exchange resin in the purification tower is regenerated, and the transferred ion exchange resin is used as is with the regenerated ion exchange resin to decolorize the sugar solution. Purification can be performed.

According to the second aspect of the present invention, the sugar solution is supplied into the purification tower, and the sugar solution is decolorized and purified by the packed bed of the ion exchange resin in the purification tower. When regenerating the ion exchange resin layer in the purification tower, the ion exchange resin in the lower layer of the packed bed in the purification tower is extracted and transferred to an external storage tank, and the residual ion exchange resin in the purification tower is also removed. After regenerating, the ion exchange resin in the storage tank is transferred onto the regenerated ion exchange resin layer and the ion exchange resin is laminated, so that the transferred ion exchange resin remains as it is along with the regenerated ion exchange resin. The sugar solution transferred from the storage tank can be used for decolorization purification and the sugar solution supplied thereafter can be subjected to decolorization purification. Furthermore, according to the present invention, when the ion exchange resin in the lower layer in the purification column is extracted and transferred, the sugar solution remaining in the purification column is also extracted and transferred to an external storage tank, and then in the purification column. You can also do sweetening off through water,
As a result, the amount of sweet water generated can be reduced as compared with the conventional case.

Further, according to the third and fifth aspects of the present invention, by using the control means, the sugar liquid is supplied to the packed beds of the ion exchange resins in the plurality of purification columns with a time difference. It is possible to separately supply and perform decolorization purification of the sugar solution in each purification tower, and to regenerate the ion exchange resin in the other purification tower. When regenerating the ion exchange resin in the purification tower to which the sugar solution has been supplied first among the plurality of purification towers, the ion exchange resin transfer means is driven under the control of the control means to drive the sugar solution first. The ion-exchange resin in the lower layer of the packed bed in the purification column that has been supplied is withdrawn and transferred to the packed bed in the other one of the purification columns that has already been regenerated to replenish the ion-exchange resin. The sugar solution can be decolorized and purified in the tower, and the remaining ion exchange resin can be regenerated in the purification tower to which the former ion exchange resin has been transferred. Then, by using a control means for these treatments, one purification tower is used for regeneration and the other purification tower is used for decolorization purification, and the decolorization purification apparatus for sugar solution is stopped even when the ion exchange resin is regenerated. It can be operated continuously without Also in the present invention, similarly to the invention of claim 2, when the ion exchange resin in the lower layer in the purification column after the decolorization treatment is extracted and transferred, the sugar solution remaining in the purification column is also extracted at the same time. By transferring, the amount of sweet water generated can be reduced.

Further, according to the invention of claim 4 of the present invention, in the invention of any one of claims 1 to 3, a strong basic anion exchange resin is used as the ion exchange resin. The pigment in the sugar solution can be efficiently removed.

[0018]

DESCRIPTION OF THE PREFERRED EMBODIMENTS The present invention will be described below with reference to the embodiments shown in FIGS. In each figure, FIG. 1 is a block diagram showing the flow of an embodiment of the sugar solution decolorizing and purifying apparatus of the present invention which is preferably used in the sugar solution decolorizing and purifying method of the present invention, and FIG. Corresponding to FIG. 1 showing an example of the decolorizing and refining apparatus for a sugar solution which is preferably used in the decolorizing and refining method for a sugar solution, and FIG. 3 shows a sugar solution which is preferably used in a decolorizing and refining method for another sugar solution of the present invention. 1 showing an example of the decolorizing and refining apparatus, and FIG. 4 shows the decolorizing and refining performance of the sugar solution after regenerating the ion exchange resin by the decolorizing and refining method of the sugar solution of the present invention and the ion by the conventional decolorizing and refining method of the sugar solution It is a graph which shows the decolorization refinement | purification performance of the sugar liquid after regenerating exchange resin.

EXAMPLE 1 First, an example of the decolorizing and purifying apparatus for sugar solution of the present invention, which is preferably used in the decolorizing and purifying method for sugar solution of the present invention, will be described. As shown in FIG. 1, the sugar solution decolorizing and purifying apparatus 10 of the present embodiment is filled with Cl-type strongly basic anion exchange resins (hereinafter, simply referred to as “anion exchange resin”) arranged in parallel with each other. Layers 11A, 11B,
The purification towers 12A, 12B, 12C having 11C, the supply pipe 13 for supplying the raw sugar solution to the respective purification towers 12A, 12B, 12C, and the sugar solution after decolorization and purification in the respective purification towers 12A, 12B, 12C And a discharge pipe 14 for discharging. The supply pipe 13 has branch pipes, and these branch pipes penetrate the upper ends of the purification towers 12A, 12B, and 12C.
And, at the tip of each branch pipe, each purification tower 12A, 12B,
Sugar liquid distributor 15A arranged in 12C,
15B and 15C are connected as a sugar solution supply unit, and a sugar solution is supplied from each sugar solution distributor 15A, 15B and 15C by a pump 13A arranged in the supply pipe 13. These sugar liquid distributors 15
Each of A, 15B, and 15C is formed as, for example, a ring-shaped pipe, and the sugar solution is uniformly supplied to the entire upper surface of the filling layer through holes formed at equal intervals in the circumferential direction. Also,
Similarly, the discharge pipe 14 also has a branch pipe, and each purification tower 12A,
The refined sugar solution in 12B and 12C is discharged from each branch pipe. Further, for example, valves 16A, 16B, 16C are provided in each branch pipe of the supply pipe 13, and sugar solution is individually supplied by these valves 16A, 16B, 16C, and the branch pipe of the discharge pipe 14 is provided. Valves 17A, 17B and 17C are provided in the container, and the sugar solutions after the treatment are individually discharged by opening these valves. Then, these valves are controlled to be opened and closed by a control device described later.

In the state shown in FIG. 1, the purification tower 12A
The packed bed 11A in the inside is in a state in which the packed quantity is smaller than the packed beds 11B and 11C in the other purification towers 12B and 12C by the amount shown by the broken line, and the regeneration of the packed bed 11A in the former purification tower 12A is performed. The regenerant solution (saline solution) is used, and the raw sugar solution is decolorized and purified in the latter purification towers 12B and 12C. In addition, the shortage of the anion exchange resin in the former purification tower 12A is, for example, another packed bed 11
For example, it is about 75 to 25% of B and 11C. This deficiency is obtained by, for example, extracting the anion-exchange resin in the lower layer of the purification tower 12B as described later and extracting it as described later.
It is moved to the inside of A to supplement the anion exchange resin of the packed bed 11A. On the other hand, since the remaining packed bed 11B in the purification tower 12B is contaminated with the coloring component due to the decolorization purification of the sugar solution, the other purification tower 12B in this purification tower 12B.
While decolorizing and refining the sugar solution in C and 12A, the anion exchange resin is regenerated with saline. The term "contamination" as used herein means that the adsorption ability of the coloring component has decreased.

As described above, each of the purification towers 12A, 12B, 1
In 2C, one group is recycled for regeneration, and the other two groups are recycled for decolorization purification. Since each of the purification towers 12A, 12B, and 12C is circulated and used in this manner, two purification towers 12 that perform decolorization purification in the state shown in FIG.
The sugar solution is supplied with a time lag with respect to B and 12C. That is, the sugar solution is supplied into the purification tower 12B first, and the sugar solution is supplied to the other purification tower 12C after a predetermined time has elapsed. As a result, when the packed bed 11B in the purification tower 12B needs to be regenerated, the uncontaminated lower layer anion exchange resin is transferred into the already regenerated purification tower 12A, and the two purification towers Even if the decolorizing and refining in 12A and 12B is temporarily stopped, the decolorizing and refining is continued in the other refining tower 12C so that the apparatus as a whole can be continuously operated without stopping. Moreover, if the anion exchange resin in the purification tower 12A is replenished as described above, the purification tower 12A replaces the purification tower 12B and performs decolorization purification of the sugar solution together with the purification tower 12C. Furthermore, after a lapse of a predetermined time, the regeneration of the packed bed 11B in the purification tower 12B is completed, and thereafter, the regeneration of the packed bed 11C in the purification tower 12C is similarly performed.

When the anion exchange resin is transferred as described above, the ion exchange resin transfer means 18 is used. The ion exchange resin transfer means 18 has an ejector, a pump, etc. (hereinafter referred to as “pump”) 18A, and a transfer pipe 18B connected to the pump 18A. When an ejector is used as the ion exchange resin transfer means 18, water is normally supplied to the driving side, so that the sugar solution existing in the purification column on the side that receives the ion exchange resin transferred by this water is diluted. Therefore, it is not preferable to use an ejector, and as the ion exchange resin transfer means 18, one that does not dilute the sugar solution, for example, a pump is preferable, but when supplying the sugar solution to the driving side, an ejector can be used. Both ends of the transfer pipe 18B are branched into three so as to communicate with the upper part and the lower part of each of the purification towers 12A, 12B and 12C. The lower branch pipes are all bearing members 19 that support the packed beds 11A, 11B, 11C.
A, 19B, 19C is opened slightly opposite to the center of the center,
The anion-exchange resin in each lower layer can be sucked. In addition, all of the upper branch tubes are opened so as to face the upper surfaces of the packed beds 11A, 11B, and 11C at the time of decolorization and purification, and the anion exchange resin sucked from the lower branched tubes is filled on the packed bed with a small filling amount after regeneration. Is supplied to. Further, valves 20A, 20B, 20C are arranged in the branch pipes connected to the lower portions of the respective purification towers 12A, 12B, 12C, and valves are provided in the branch pipes connected to the upper portions of the respective purification towers 12A, 12B, 12C. 21A, 21B, and 21C are arranged. Then, when regenerating the anion exchange resin in the purification tower 12B as described above, the pump 18A is driven with the upper and lower valves being controlled to be opened and closed by the control device described later, and, for example, the anion in the lower layer in the purification tower 12B is driven. The exchange resin is transferred to the upper part of the purification tower 12A, or the anion exchange resin in the lower layer in the purification tower 12C is transferred to the purification tower 12B.

Further, the decolorizing and refining apparatus 10 for sugar solution of this embodiment
Is provided with a regenerant supply means 22 for supplying a saline solution as a regenerant solution toward the remaining packed bed after the anion exchange resin transfer means 18 has transferred the anion exchange resin. The regenerant supply means 22 includes regenerant distributors 22A, 22B, 22C as regenerant supply units in the respective purification towers 12A, 12B, 12C, and a pump 22D.
Thus, the saline solution in the storage tank (not shown) is supplied to each of the purification towers 12A, 12B, 12C via the second supply pipe 22E. Valves 23A, 23B and 23C are arranged in the branch pipes of the second supply pipe 22E, and saline is supplied to the regenerant distributors 22A, 22B and 22C by opening these valves 23A, 23B and 23C. I am doing it. In addition, the discharge pipe 14 described above
A second discharge pipe 24 for discharging the saline solution after the regeneration treatment is connected to the valves 17A, 17B and 17C. Therefore, these valves 17A, 17B, 17C connect the respective purification columns 12A, 12B, 12C to the discharge pipe 14 when discharging the sugar solution, and the second valves when discharging the saline solution.
It is configured as a three-way valve that communicates with the discharge pipe 24. When the anion exchange resin in the purification tower 12A is regenerated as described above, the pump 22D is driven with each valve being controlled to open and close by the control device described later, and the regenerant distributor 22A causes the inside of the purification tower 12A to move. The anion exchange resin is regenerated by supplying saline to the regenerating packed bed 11A having a small filling amount. Therefore, each regenerant distributor 22A, 22
B and 22C are located slightly above the upper surface of the remaining packed layer after the anion exchange resin of the lower layer has been extracted.
When the other refining towers 12B and 12C are used for regeneration as described above, saline is similarly supplied from the respective regenerant distributors 22B and 22C. These regenerant distributors 2
2A, 22B and 22C are constructed according to the above sugar solution distributor.

Further, the decolorizing and refining apparatus 10 for sugar solution of this embodiment
Is provided with a control device 25 connected to the above-mentioned motor and valve via a control cable 25A indicated by a broken line, and a control signal of the control device 25 is transmitted to the control cable 25A.
The signal is transmitted to a motor and a valve via A to drive and control them so that the method for decolorizing and refining a sugar solution of the present invention is carried out. For example, the state shown in FIG. 1 will be described. In this case, the anion exchange resin is regenerated in the purification tower 12A as described above, and the purification tower 12B, 1
The decolorization and purification of the sugar solution will be carried out in 2C. For that purpose, first, the valve 16B of the sugar liquid supply pipe 13 is opened by the control signal of the control device 25, and the other valve 16C,
16A is closed and the sugar solution can be supplied only to the purification tower 12B, and the pump 13A of the supply pipe 13 is driven. As a result, the sugar solution is first supplied from the sugar solution distributor 16B to the upper surface of the packed bed 11B in the purification tower 12B via the valve 16B. The sugar solution is decolorized and refined while flowing down the packed bed 11B, and the discharge pipe 14 has a valve 17B.
And are fed to a predetermined storage tank via the discharge pipe 14. Then, after the sugar solution is supplied into the purification tower 12B for a predetermined time, the supply pipe 1 is supplied by the control signal of the controller 25.
The valve 16C of No. 3 is opened, the sugar solution is supplied into the purification tower 12C, and the decolorization purification of the sugar solution is started in the purification tower 12C as in the purification tower 12B. The refined sugar solution here joins with the refined sugar solution from the purification tower 12A flowing through the discharge pipe 14 via the valve 17C of the discharge pipe 14 which is already open.

On the other hand, the valve 23A of the regenerant supply means 22 is opened by the control signal of the control device 25, and the other valve 2
3C and 23A are closed, and the saline can be supplied only to the purification tower 12A, and the pump 22D of the regenerant supply means 22 is driven. Thereby, the saline solution is supplied from the regenerant distributor 22A through the valve 23A toward the upper surface of the packed bed 11A in the purification tower 12A. The saline solution regenerates the anion exchange resin while flowing down the packed bed 11A, and the already-opened valve 17A and the already-opened saline solution are fed to the storage tank via the second discharge pipe 24. It When the regeneration is completed, the valve 23A of the regenerant supply means 22 is closed based on the control signal of the control device 25, and the valve 17A is also closed to stop the purification tower 12A, and the regeneration tower 12 is made to stand by in a completed state.

[0026] During this time, the refining tower 12 that first received the sugar solution
The adsorption performance of the packed bed 11B in B decreases, and the packed bed 11B
When it becomes necessary to regenerate (the operator judges by sampling the sugar solution at the time when the regenerating is necessary, or in consideration of the decolorizing and refining time, the processing solution amount, etc.) of the control device 25. The valve 16B that controls the supply of the sugar solution by the control signal is closed, the valve 17B of the discharge pipe 14 is switched to the second discharge pipe 24, and the refining tower 12B communicates with the second discharge pipe 24. On the other hand, the valves 20B and 21A of the ion exchange resin transfer means 18 are opened, and the purification tower 12B and the purification tower 12A communicate with each other via the transfer pipe 18B. This time,
The pump 18A is driven, and the packed bed 11B in the purification tower 12B
The lower layer anion exchange resin together with the sugar solution remaining in the purification tower 12B is passed through the transfer pipe 18B to the purification tower 12A.
Then, the anion exchange resin is replenished on the packed bed 11A of the purification column 12A by the amount shown by the broken line in FIG. After replenishment, the pump 18A stops and each valve 20B, 2
1A closes. Next, in the purification tower 12A that has been replenished with the anion exchange resin based on the control signal, the valve 16A of the sugar solution supply pipe 13 is opened, and the valve 17A is switched from the second discharge pipe 24 to the discharge pipe 14 to refine the purification tower 12A. The inside is communicated with the discharge pipe 14, and the sugar solution is received by the already driven pump 13A. As a result, the purification tower 1
2A replaces the purification tower 12B to perform decolorization purification of the sugar solution, and depurification purification is performed in two purification towers including the other purification tower 12C. In addition, in parallel with this, the purification tower 12
In B, first, water is passed through the purification column 12B to perform sweetening off in which the remaining sugar liquid remaining in the column is discharged, and then backwash water is supplied from the lower part of the column to purify column 1.
The remaining packed bed 11B in 2B is backwashed, and then saline solution is received from the distributor 22B to regenerate the remaining packed bed 11B.

In this embodiment, the operation of transferring the anion exchange resin in the lower layer in the purification tower 12B, which has been subjected to the decolorization process of the sugar solution as described above, to another purification tower, and the sweetening off operation of the purification tower 12B is performed. It is advisable to carry out this before carrying out, whereby a part of the sugar liquid remaining in the purification column 12B after the decolorization step can be transferred together with the anion exchange resin, and as a result, during the sweetening off of the purification column 12B. In addition, the amount of sugar solution extracted to the outside of the tower is remarkably smaller than in the past, and accordingly, the amount of sweet water generated is remarkably reduced, and the sugar solution recovery cost can be remarkably reduced.

When the decolorizing and refining function in the refining tower 12C further deteriorates with the passage of time, the lower layer anion exchange resin in the refining tower 12C is already regenerated based on the control signal in the same manner as described above. After transfer to the completed purification tower 12B together with the residual sugar solution, after the completion of transfer, the purification tower 12B performs decolorization purification in place of the purification tower 12C, and within the purification tower 12C, sweetening off, backwashing and backwashing of the packed bed 11C. Play back. In this way, the three purification towers 12A, 12
Of B and 12C, one is used for regeneration and the other two are continuously circulated for decolorization and purification.

As described above, according to this embodiment, the decolorizing and refining apparatus 10 for sugar solution is composed of the refining towers 12A, 12B and 12C.
While using any one of the above for regeneration of sugar solution,
Since the other two groups are circulated and used for decolorization and purification, the decolorization and purification device 10 for sugar solution can be continuously operated even when the anion exchange resin is regenerated, and the decolorization and purification ability of the sugar solution can be achieved. Can be significantly increased.
When regenerating the anion exchange resin, each purification tower 1
The whole amount of the packed layers 11B and 11C in 2B and 12C is not regenerated, and the anion exchange resin in the lower layer portion (total 25 to 75
%) Was extracted and reused, and only the remaining packed bed was regenerated, so the amount of saline solution used could be significantly reduced,
Running costs can be saved significantly. Further, when the anion-exchange resin in the lower layer in the purification tower 12B that has undergone the decolorization step of the sugar solution is transferred to another purification tower, the sugar solution remaining in the purification tower 12B is transferred at the same time to perform purification, The amount of sugar liquid extracted at the time of regenerating the remaining anion exchange resin in the tower 12B is much smaller than in the conventional case, and accordingly, the amount of sweet water generated can be significantly reduced.

Example 2 An example of another method for decolorizing and refining a sugar solution of the present invention can be carried out using the single-column type decolorizing and refining apparatus shown in FIG. This sugar solution decolorizing and purifying device 30
As shown in the figure, the anion exchange resin 31A in the lower layer of the packed bed 31 is extracted from the purification tower 32 and directly packed in the packed bed 3
1 is transferred to the upper layer and laminated, and the anion exchange resin 31A originally located in the lower layer is reused as it is in the next decoloring step without being regenerated. That is, the decolorizing and refining apparatus 30 used in this embodiment is different from the decolorizing and refining apparatus 10 of the first embodiment in that one refining tower 32 is used for regeneration and decolorizing and refining. It cannot be done. The decolorizing and refining apparatus 30 used in this embodiment will be further described below.

The purification tower 32 is provided with a supply pipe 33 for supplying a sugar liquid and a discharge pipe 34 for discharging the sugar liquid after decolorization and purification. Then, a sugar solution distributor 35 arranged in the refining tower 32 is connected to the tip of the supply pipe 33, and the sugar solution distributor 35 supplies the sugar solution by the operation of a pump 33A arranged in the supply pipe 33. I am doing it. A valve 36 is provided in the discharge pipe 34. In addition, the purification tower 32 has a packed bed 31
Ion exchange resin transfer means 37 for transferring the lower layer anion exchange resin 31A onto the upper layer anion exchange resin 31B is provided. The ion exchange resin transfer means 37 is
It has a pump 37A, a transfer pipe 37B connected to the pump 37A, and a flow meter 37E arranged in the transfer pipe 37B. The end of the transfer pipe 37B that penetrates the lower side wall is opened to face slightly above the center of the support member 38 that supports the packed layer 31, and the end that penetrates the upper side wall is the upper surface of the packed layer 31 during decolorization purification. It is open to face. When the anion exchange resin in the purification tower 32 is regenerated, the pump 37A is driven to extract the anion exchange resin 31A in the lower layer in the purification tower 32 and directly stack it on the upper layer of the packed bed 31 in the purification tower 32. I am doing it.
When transferring the resin, the transfer amount is measured by a flow meter 37E so that a predetermined amount of anion exchange resin can be transferred accurately.

Further, a regenerant supply means 39 is provided in the purification tower 32, and the lower part of the packed bed 31 is regenerated by the regenerant supply means 39. This regenerant supply means 39 is provided with a regenerant distributor 39A in the purification tower 32, and supplies a saline solution in a storage tank (not shown) into the purification tower 32 via a second supply pipe 39B by a pump (not shown). Is done. This regenerant distributor 39A is a residual packing layer 31B that has moved to the lower portion by extracting the anion exchange resin 31A of the lower layer.
It is arranged so that it is slightly above the upper surface of the. Further, the valve 36 of the above-mentioned discharge pipe 34 is connected to the second discharge pipe 34A for discharging the saline solution used for regeneration,
By switching the valve 36, the purifying column 32 is communicated with the discharge pipe 34 when the sugar solution is discharged, and is communicated with the second discharge pipe 34A when the salt solution is discharged.

An embodiment of the method for decolorizing and refining a sugar solution of the present invention using the decolorizing and refining apparatus 30 will be described below.
The pump 33A is driven to supply the sugar solution from the sugar solution distributor 35 toward the upper surface of the packed bed 31 in the purification tower 32. The sugar solution is decolorized and purified while flowing down the packed bed 31,
It is fed to a predetermined storage tank through the discharge pipe 34. Then, when the sugar liquid is supplied into the purification tower 32 and the adsorption performance of the packed bed 31 is lowered after a predetermined time has passed, the anion exchange resin is regenerated. When reproducing, the device is stopped.

After that, after performing sweetening off by a conventional method, or without performing the sweetening off, the pump 37 of the ion exchange resin transfer means 37 is used as it is.
When A is driven, the anion exchange resin 3 in the lower layer of the packed bed 31
1A (25 to 75% of the filling amount) is extracted from the purification column 32 through the transfer pipe 37B, and the anion exchange resin is transferred to the upper surface of the packed bed 31 to be laminated. When the lower layer anion exchange resin 31A is transferred, the ion exchange resin transfer means 37 is stopped. Next, if the sweetening off is not performed in advance, after the sweetening off is performed here, the regenerant supply means 39 is driven to supply the saline from the regenerant distributor 39A, and after the transfer, the inside of the purification tower 32 is transferred. Residual anion exchange resin that moved downward (Fig. 2
Anion exchange resin 31B located in the upper layer in
To play. Then, after the regeneration of the packed bed 31 is completed,
The sugar solution is again decolorized and purified. In the case of this example, when the above-mentioned backwashing operation is performed in the regeneration step after the decolorization step of the sugar solution, the upper layer resin which should not be regenerated and the lower layer resin which should be regenerated are mixed. Therefore, the intended purpose cannot be achieved, so that the backwashing operation is performed once every 3 to 4 times, for example, without backwashing each time regeneration is performed.

As described above, according to this embodiment, the anion exchange resin 31A which is not so contaminated in the lower layer in the purification tower 32 and has sufficient decolorizing ability when used as the upper layer of the packed bed is extracted and Directly transferred onto the remaining anion exchange resin 31B in the purification tower 32 to replace the lower layer anion exchange resin 31A and the upper layer anion exchange resin 31B to form a new packed bed 31, and then the purification tower 3
After regenerating the remaining anion exchange resin 31B in 2, that is, the anion exchange resin that has moved from the upper layer to the lower layer, both of them are used as they are for decolorizing and refining the sugar solution. It is only necessary to regenerate the anion exchange resin 31B, which can significantly reduce the amount of saline solution used as the regenerant solution, and to significantly reduce the running cost of the decolorization / purification device 30.

Example 3 Still another example of the method for decolorizing and refining a sugar solution of the present invention can be carried out using the single-column decolorizing and refining apparatus shown in FIG. This sugar solution decolorization and purification device 5
As shown in the figure, 0 indicates that the anion exchange resin 51A in the lower layer of the packed bed 51 is extracted together with the sugar solution from the purification tower 52 and transferred to a storage tank 60 arranged outside to temporarily store the inside of the storage tank 60. The anion exchange resin and the sugar solution are stored in the storage tank, and the remaining anion exchange resin 51B after the transfer is regenerated.
The procedure is the same as that of Example 2 except that the anion exchange resin is returned from 0 to the purification tower 52 together with the sugar solution, and the decolorization purification of the sugar solution is subsequently performed. Hereinafter, the decolorizing and refining apparatus 50 used in this embodiment will be further described.

The purification tower 52 is provided with a supply pipe 53 for supplying the sugar liquid and a discharge pipe 54 for discharging the sugar liquid after decolorization and purification. Then, a sugar solution distributor 55 arranged in the refining tower 52 is connected to the tip of the supply pipe 53, and the sugar solution distributor 55 supplies the sugar solution by the operation of a pump 53A arranged in the supply pipe 53. I am doing it. A valve 56 is arranged in the discharge pipe 54. Further, the purification tower 52 is provided with an ion exchange resin transfer means 57.

The ion exchange resin transfer means 57 includes first and second pumps 57A and 57B and these pumps 57.
The first and second transfer pipes 57C and 57D are provided with A and 57B, respectively, and the flowmeter 57E is provided to the first transfer pipe 57C. One end of the first transfer pipe 57C supports the packed bed 51 in the purification tower 52, and the support member 5 is provided.
8 Open slightly opposite to the center and the other end is the storage tank 60
And the lower layer of the anion exchange resin 51A in the purification tower 52 is stored together with the sugar solution in the storage tank 6 by the first pump 57A.
The amount of the anion exchange resin to be transferred is accurately measured by the flow meter 57E. Further, one end of the second transfer pipe 57D is opened so as to face the bottom surface in the storage tank 60, and the other end is opened toward the upper surface of the packed bed 51 in the purification tower 52, and the second pump 57B is used to store the storage tank. Anion exchange resin 51 in 60
A is returned to the purification tower 52 together with the sugar solution.

In FIG. 3, 59 is a regenerant supply means. This regenerant supply means 59 is provided with a regenerant distributor 59A in the refining tower 52, and a second supply pipe 59B is provided by a pump (not shown). The saline solution in a storage tank (not shown) is supplied to the inside of the refining tower 52 via this.
In addition, the valve 56 of the discharge pipe 54 described above is connected to the second discharge pipe 54A for discharging the saline solution after the regeneration treatment,
By switching the valve 56, the purifying column 52 is communicated with the discharge pipe 54 when the sugar solution is discharged, and is communicated with the second discharge pipe 54A when the salt solution is discharged.

Next, one embodiment of the method for decolorizing and refining a sugar solution of the present invention using the decolorizing and refining apparatus 50 will be described.
The pump 53A is driven to supply the sugar solution from the sugar solution distributor 55 toward the upper surface of the packed bed 51 in the purification tower 52. The sugar solution is decolorized and purified while flowing down the packed bed 51,
It is fed to a predetermined storage tank through the discharge pipe 54. Then, when the sugar solution is supplied into the purification tower 52 and the adsorption performance of the packed bed 51 is lowered after a predetermined time, the anion exchange resin is regenerated. When reproducing, the device is stopped.

After that, when the first pump 57A of the ion exchange resin transfer means 57 is driven, the anion exchange resin 51A (25 to 75% of the filling amount) in the lower layer of the packed bed 51 is purified.
The sugar solution remaining in 2 is taken out from the purification tower 52 through the first transfer pipe 57C, and the anion exchange resin and the sugar solution are temporarily stored in the storage tank 60. After that, water is passed through the purification tower 52 to carry out sweetening off, and then backwashing is carried out by a conventional method, and then a regenerant supply means 59.
Drive the remaining anion exchange resin 51 in the purification tower 52.
Play B. After the regeneration of the anion exchange resin 51B is completed, the second pump 57B of the ion exchange resin transfer means 57 is formed.
Is driven to supply the anion exchange resin in the storage tank 60 together with the sugar solution to the regenerated anion exchange resin in the purification column 52 through the second transfer pipe 57D and stack the layers to secure the original filling amount. To do. After that, the packing layer 5 in which the upper layer and the lower layer are exchanged
In step 1, the sugar solution is decolorized and purified.

As described above, according to this example, unlike the case of Example 2, the lower layer anion exchange resin 51A is used.
Of the extracted anion exchange resin 51B with the sugar solution and regenerating the remaining anion exchange resin 51B, the extracted anion exchange resin and sugar solution are temporarily stored in the storage tank 60, and the anion exchange resin in the purification tower 52 is stored. After regenerating, the storage tank 60
Return the anion exchange resin and sugar solution into the purification tower 52,
Since the returned sugar solution and the sugar solution supplied thereafter can be decolorized and purified, the same effects as in Example 2 can be expected, and in this Example, anion exchange is performed in the same manner as in Example 1. The amount of sugar solution to be extracted at the time of regenerating the resin is much smaller than in the past, and accordingly, the amount of sweet water generated can be markedly reduced, and the effect of significantly reducing the sugar solution recovery cost can be expected.

Further, in Example 3, as shown in FIG. 3, an upper space (freeboard) used when backwashing the packed bed 51 is provided in the purification column 52, but in the present invention, the lower layer anion exchange is used. The resin 51A is extracted and temporarily stored in a storage tank 60 provided outside the tower, and thereafter, since only the upper layer anion exchange resin 51B is regenerated, the lower layer anion exchange resin 51A is extracted into the purification column 52 after extraction. A space corresponding to the volume of the discharged resin is always generated. Therefore, since the residual anion exchange resin can be backwashed using this space, it is not always necessary to provide an upper space for backwashing, and the purification column 52 is almost filled with anion exchange resin. Can be filled in to decolorize the sugar solution. Therefore, when an existing purification column having an upper space for backwashing is remodeled and used in the practice of the present invention, this upper space can be newly filled with anion exchange resin, and the decolorization purification of the sugar solution is performed. You can improve your ability.
This is the same as in the decolorizing and refining apparatus provided with a plurality of purification towers as in the case of Example 1, so that a space is created in any one of the plurality of purification towers. In other words, the other purification tower may be filled with the anion exchange resin almost completely, and therefore, when the present invention is carried out by modifying the existing decolorizing and refining apparatus, the same capacity improvement as described above is required. There are merits.

Test Example 1 In this test example, after the decolorization step of the sugar solution, the anion exchange resin in the lower layer of the packed bed in the purification column was transferred to the upper layer and reused without being regenerated. This is a test conducted to see the effect of the decolorizing and refining method. In this test example, Amberlite XT-5007 (manufactured by Rohm and Haas) was used as a strongly basic anion exchange resin (AER), and 50 mL of the Cl type of this anion exchange resin was packed in a packed tower to prepare a raw sugar solution (sugar). The concentration: Bx55.5, color value: 80) was passed through the packed column at a treatment rate of 400 mL / h at a temperature of 50 ° C. for decolorization purification. The Brix sugar concentration was used as the sugar concentration. Then, when the treatment amount of the raw sugar solution reached 80 L / L-AER, the treatment of the raw sugar solution was stopped, and then 25 mL of the anion exchange resin in the lower layer was extracted from the packed column. And the remaining 25
After regenerating the mL of the anion exchange resin with 50 mL of 10% saline (twice the amount of the regenerated resin), in order to reuse the extracted anion exchange resin as it is, it is laminated on the regenerated anion exchange resin, Decolorization purification was performed again under the same conditions.

The relationship between the treated amount of the raw sugar solution and the color value of the sugar solution after decolorization and purification is shown by a circle in FIG. The color value (C.I.) in this case was calculated by filling a 10 cm cell with a sugar solution, measuring the absorbance (OD) at 420 nm and 720 nm by absorption spectrometry, and substituting the measured value into the following formula. did. CI = (OD420nm-OD720nm) × 1000 × 100
/ Bx × ρ × 10 where ρ is the specific gravity (g / mL) of the sugar solution.

Comparative Example 1. This Comparative Example is a test example except that 50 mL of the anion exchange resin after the decolorization step was completely regenerated by 100 mL of saline solution (that is, twice the amount of the regenerated resin) by the conventional method. The raw sugar solution was decolorized and purified in the same manner as in 1, and the results are shown by the crosses in FIG.

According to the results shown in FIG. 4, in Test Example 1, half of the upper layer was regenerated by the method of this example, and half of the lower layer was transferred to the remaining anion exchange resin and reused. Even though the amount of regenerant used is half that of Comparative Example, even if the amount of raw sugar solution processed reaches 80 L / L-AER, the same amount as in Comparative Example 1 in which the entire amount of resin used is regenerated by the conventional method It can be seen that the decolorizing and refining ability of is exhibited. In the conventional decolorizing and refining apparatus that has been industrially used, the throughput of the raw sugar solution in one cycle is usually 40 to 60 L.
/ L-AER indicates that the method of the present invention can be industrially used. Then, the present invention is applied to the above-described Examples 1 to 1.
3, an industrial scale decolorizing and refining apparatus 10, 30,
It turns out that it can be applied as 50. When applied to such an industrial scale, it is only necessary to regenerate half of the anion exchange resin as described in each of the above examples, so the amount of saline used at that time is half that of the conventional one. It can be seen that the maintenance cost is reduced accordingly.

Although the Cl type strong basic anion exchange resin has been described as an example of the ion exchange resin in the above embodiment, the present invention is not limited to the Cl type strong basic anion exchange resin, but also a weak basic anion. An exchange resin, a strongly acidic cation exchange resin, a weakly acidic cation exchange resin or the like can be used. Further, the present invention is not limited to the above-described embodiments, and is included in the present invention as long as the gist of the present invention is not deviated.

[0049]

According to the invention described in claim 1 of the present invention, when regenerating the ion exchange resin in the purification tower, the ion exchange resin in the lower layer in the purification tower is extracted to leave the residue in the purification tower. After directly transferring onto the ion-exchange resin layer, the remaining ion-exchange resin in the purification tower is regenerated, and the transferred ion-exchange resin is used as it is along with the regenerated ion-exchange resin for decolorization purification of sugar solution. Because,
It is possible to provide a method for decolorizing and refining a sugar solution which can remarkably reduce the amount of the regenerant used and save the maintenance cost remarkably.

According to the second aspect of the present invention, when the ion exchange resin in the purification column is regenerated,
The ion-exchange resin in the lower layer of the packed bed is transferred to the external storage tank together with the sugar solution remaining in the purification tower, while the residual ion-exchange resin in the purification tower is regenerated, and then the ion-exchange resin in the storage tank is regenerated. Can be used together with the sugar solution on the regenerated ion exchange resin, and the transferred ion exchange resin can be used as it is along with the regenerated ion exchange resin for decolorization purification of the sugar solution, so the amount of regenerant used is significantly reduced. It is possible to provide a method for decolorizing and refining a sugar solution in which the amount of sweet water generated can be significantly reduced, and the recovery cost of the sugar solution can be significantly reduced, while the maintenance cost can be significantly reduced.

According to the third and fifth aspects of the present invention, among the plurality of purification towers to which the sugar solution has been supplied with a time lag, the inside of the purification tower to which the sugar solution has been supplied first is When the ion exchange resin is regenerated, the ion exchange resin in the lower layer of the packed bed in the purification column is transferred to the packed bed in the other purification column to replenish the ion exchange resin, and then the purified column is purified. In the purification tower to which the ion exchange resin has been transferred, the remaining ion exchange resin is regenerated, and one purification tower is used for regeneration and the other purification tower is continuously circulated for decolorization purification. Since it can be used and a part of the sugar solution existing in the tower can be transferred at the same time when the resin is transferred, the amount of the regenerant used can be significantly reduced, and the maintenance cost can be significantly saved and By reducing the amount of water generated Liquid collection costs can be much savings,
Further, it is possible to provide a decolorizing and purifying method of a sugar solution and a decolorizing and refining apparatus of a sugar solution, which can continuously regenerate the ion-exchange resin and decolorize and refine the sugar solution in parallel without stopping the apparatus.

Further, according to the invention described in claim 4 of the present invention, in the invention described in any one of claims 1 to 3, a strong basic anion exchange resin is used as the ion exchange resin. It is possible to provide a method for decolorizing and purifying a sugar solution, which can efficiently remove the dye in the sugar solution. .

[Brief description of drawings]

FIG. 1 is a configuration diagram showing a flow of an embodiment of a sugar solution decolorizing and purifying apparatus of the present invention which is preferably used in the sugar solution decolorizing and purifying method of the present invention.

FIG. 2 is a view corresponding to FIG. 1 showing an example of a sugar solution decolorizing and purifying apparatus that is preferably used in another method for decolorizing and refining a sugar solution of the present invention.

FIG. 3 is a view corresponding to FIG. 1, showing an example of a sugar solution decolorizing and purifying apparatus that is preferably used in still another sugar solution decolorizing and purifying method of the present invention.

FIG. 4 Decolorization purification performance of a sugar solution after regenerating an ion exchange resin by the decolorization purification method of a sugar solution of the present invention and decolorization of a sugar solution after regeneration of an ion exchange resin by a conventional decolorization purification method of a sugar solution It is a graph which shows refining performance.

[Explanation of symbols]

10, 30, 50 Decolorization / refining device for sugar solution 11A, 11B, 11C Packed bed (anion exchange resin) 12A, 12B, 12C Purification tower 13 Supply pipe (for raw sugar liquid) 14 Exhaust pipe (for purified sugar liquid) 18 Ions Exchange resin transfer means 22 Regenerant supply means 22A, 22B, 22C Regenerant distributor (regenerant supply part) 31 Packed bed (anion exchange resin) 32 Purification tower 33 Supply pipe (raw sugar liquid) 34 Discharge pipe (purified sugar liquid) 37) Ion exchange resin transfer means 39 Regenerant supply means 51 Packed bed (anion exchange resin) 52 Purification tower 53 Supply pipe (for raw sugar solution) 54 Discharge pipe (for purified sugar solution) 57 Ion exchange resin transfer means 59 Regeneration Agent supply means

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[Procedure amendment]

[Submission date] November 13, 1995

[Procedure Amendment 1]

[Document name to be amended] Statement

[Name of item to be corrected] 0045

[Correction method] Change

[Correction content]

The relationship between the treated amount of the raw sugar solution and the color value of the sugar solution after decolorization and purification is shown by a circle in FIG. The color value (C.I.) in this case was calculated by filling a 10 cm cell with a sugar solution, measuring the absorbance (OD) at 420 nm and 720 nm by absorption spectrometry, and substituting the measured value into the following formula. did. CI = (OD420nm-OD720nm) × 1000 × 100
/ ( Bx × ρ × 10 ) However, in the formula, ρ is the specific gravity (g / mL) of the sugar solution.

─────────────────────────────────────────────────── ─── Continuation of the front page (51) Int.Cl. ⁶ Identification code Internal reference number FI Technical indication C13D 3/14 C13F 1/14

Claims (5)

[Claims] 1. A method for decolorizing and purifying a sugar solution, which comprises regenerating the ion exchange resin after decolorizing and purifying the sugar solution by allowing the sugar solution to flow down while contacting the packed bed of the ion exchange resin in the purification tower. When the ion-exchange resin is regenerated, the ion-exchange resin in the lower layer of the packed bed is extracted and transferred to the upper part of the purification tower to be laminated on the remaining packed bed, and then the residual material in the purification tower. A method for decolorizing and refining a sugar solution, characterized in that the ion-exchange resin is regenerated, and then the transferred ion-exchange resin is used as it is with the regenerated ion-exchange resin for decolorizing and refining the sugar solution. 2. A method of decolorizing and refining a sugar solution, which comprises regenerating the ion exchange resin after decolorizing and purifying the sugar solution by allowing the sugar solution to flow down while contacting the packed bed of the ion exchange resin in the purification tower. When regenerating the ion exchange resin layer, the ion exchange resin in the lower layer of the packed bed is extracted and transferred to a storage tank outside the purification column, and then the residual ion exchange resin in the purification column After regeneration, the ion exchange resin in the storage tank is transferred onto the ion exchange resin layer after regeneration, and the transferred ion exchange resin is used as it is along with the ion exchange resin after regeneration for decolorization purification of the sugar solution. A method for decolorizing and refining a sugar solution, which comprises: 3. A sugar solution is supplied to a packed bed of ion exchange resins in a plurality of purification towers with a time lag to perform decolorization purification of the sugar solution in each purification tower, and at the same time in another purification tower. Is a method for decolorizing and refining a sugar solution that regenerates the ion exchange resin, and when regenerating the ion exchange resin in the purification tower to which the sugar solution was previously supplied among the plurality of purification towers, The ion-exchange resin in the lower layer of the packed bed is extracted and transferred to the packed bed in another purification column where regeneration has already been completed, and the ion-exchange resin is replenished. In addition to performing purification, the remaining ion exchange resin is regenerated in the purification tower to which the ion exchange resin has been transferred.One purification tower is used for regeneration of the ion exchange resin, and the other purification tower is continuously used for decolorization purification. Of the sugar solution, which is characterized by being reused for Decolorization purification method. 4. The method for decolorizing and refining a sugar solution according to claim 1, wherein the ion exchange resin is a strongly basic anion exchange resin. 5. A sugar solution is supplied to a packed bed of ion exchange resins in a plurality of purification towers with a time lag, and the sugar solution is decolorized and purified in each of the purification towers, and at the same time in another purification tower. Is a sugar solution decolorizing and refining device for regenerating the ion exchange resin, and the ion exchange resin in the lower layer of the packed bed in each of the above-mentioned purification towers is individually extracted and individually transferred to the upper part in another purification tower. An exchange resin transfer means, and a regenerant supply means for supplying a regenerant toward the residual ion exchange resin after the ion exchange resin has been transferred by the ion exchange resin transfer means,
A control means for driving and controlling these means is used, and when the ion exchange resin in the purification tower to which the sugar solution has been supplied first among the plurality of purification towers is regenerated by using the control means, The ion-exchange resin in the lower layer of the packed bed in the purification tower is extracted and transferred to the packed bed in the other one of the already-purified purification towers to supplement the ion-exchange resin, and then decolorized in this purified tower. Along with the purification, the remaining ion exchange resin is regenerated in the purification column to which the ion exchange resin has been transferred, and one purification column is used for regeneration and the other purification column is continuously circulated for decolorization purification. A decolorizing and refining device for a sugar solution, which is characterized by the following control.