JPS58205479A - Apparatus for reducing acidity of citrus fruit juice - Google Patents

Abstract

PURPOSE:To carry out the reduction of acidity of stock fruit juice, by contacting the fruit juice with an anion exchange resin layer in a column while passing through the column upward. CONSTITUTION:The stock juice feeding means 3 to feed the stock juice to the refining column 1 is attached near the bottom of the column 1, and the means 4 for discharging the refined jice is attached near the top of the column 1. The anion exchange resin feeding means 9 is placed below the means 4, and the anion exchange resin discharging means 11 is placed above the means 3 and below the means 9. The stock juice supplied to the column 1 is brought into contact with the layer 4 in the course of the upward passage through the anion exchange resin layer 14, and refined. The acidity of the stock juice can be reduced without causing the clogging of the layer 14 by this process, and consequently, the additional pretreatment process e.g. the removal of solid components such as pulp becomes unnecessary.

Description

DETAILED DESCRIPTION OF THE INVENTION The invention relates to an apparatus for reducing acid by removing citric acid from citrus fruit juice, such as tangerine juice.

Citrus fruit juices such as mandarin oranges contain ash, noserp (insoluble solids), etc., and conventionally, to reduce the acidity of these citrus fruit juices, ion exchange resin is filled and the undiluted juice is passed through a telescope in a downward flow. There was a method of passing liquid through the resin, or a batch method in which ion exchange resin was added at 2 to 3 V/'Vo (-), mixed in a mixer, etc., and the used resin was taken out and regenerated.

However, when the fruit juice stock solution is passed downward through the purification tower, the ion exchange resin bed is likely to be clogged with the pulp content in the fruit juice, so pretreatment is performed to reduce this pulp content. ), and the batch method has the disadvantage that processing means such as mixing, stirring, and separation are complicated.

The invention is intended to overcome these conventional drawbacks and provide a new method for reducing citrus juice production.

FIG. 1 shows an embodiment of the invention.

2, in the RI smelter 1, a stock solution supply means 3 is provided near the bottom plate 2 of the column, and a purified liquid discharge means 4 is provided near the upper end of the column 1. The stock solution supply means 3 has a spout for the fruit juice stock solution, and is preferably composed of i-liquid sprinklers g5 arranged in a cross pattern, and a pipe 6 for supplying the stock solution to the stock solution spray pipe 5 from outside the tower. The stock solution dispersion pipe 5 may be in the shape of a disc, and the spout may be used as a strainer or a Saran net or the like may be attached as a companion. The purified liquid discharge means 4 is composed of a water collector 7 having a good opening for allowing the ion exchange resin to pass therethrough, and a pipe 8 for discharging the 873 liquid from the water collector 7 to the outside of the tower. Near the upper end of the column and below the purified liquid discharge means 4, an anion exchange resin supply means 9 is provided. This anion exchange resin supply means 9
The tube is formed by a tube 10 opening downward into the tower. Above the stock solution supply means 3 in the tower, there is a ion-exchanged fat percentage below the supply means 9. The fat removal means 11 is composed of a resin absorption tube 12 and a tube 13 for discharging anionic fat from the absorption tube 12 to the outside of the column.

In such an elliptical column I, the anion exchange resin supplied into the column from the anion exchange south M\I side 9 has an ion exchange resin layer 14 between the supply means 9 and the discharge means 11. On the other hand, when the fruit juice stock solution is transferred from the stock solution supply means 3 at the bottom of the tower to the entire upper part of the tower and is discharged from the '8 production liquid discharge means 4 provided at the upper end of the tower, the stock solution flows upward throughout the tower. It passes through the anion exchange resin layer 14 and comes into contact with it. This anion exchange resin layer 14 preferably forms a fluidized bed.

In addition, the stock solution supply means 3 and the self-ion exchange resin co-producing means ll
A polymer with a higher specific gravity than the ion exchange resin /2i
: Preferably, the inert resin in the resin chamber is initially charged, and when such an inert porridge 15 is provided, the undiluted solution supply means 3
The undiluted fruit juice supplied by the doctor is washed away by this inert resin layer 15, and the subsequent contact with the ion exchange and fecal fat in the box makes it completely satisfactory.

Thus, in such an apparatus, the fruit juice concentrate supplied into the column from the concentrate supply means 3 flows upward from the concentrate distribution pipe 5, and in the process of passing through the inert buffer 15, an even upward flow occurs. (rectification), anion exchange resin layer 14,
Needle amount or flow, - ■ The flow rate is enough to develop the recording layer 14 by about 10 (10 + - 188, V
, (Space Velocity) to become a purified liquid from which citric acid has been removed, and the purified liquid discharge means, that is, the water fountain 7, spins a V pipe 8, and is deposited outside the tower.

In addition, the anion exchange resin is 40 to 60 B
, V , (Bed Volume@) processing requires regeneration, and the case where this regeneration is performed continuously is described in the second example.
Don't explain based on diagrams. The anion exchanger 1 that can be treated with one Kozue tower is transferred to the upper part 1 of the regeneration tower 17 by the feed fat transfer pipe 16 connected to the nozzle 13 of the anion exchange resin discharge means 11.
%, w3 into the regeneration tower. In the regeneration tower 17, the ion exchange resin is washed with anti-purification water, regenerated with a regeneration chemical of caustic soda, and then undergoes an extrusion step 2 and a washing step to complete the regeneration. The regenerated kudzu fat is regenerated from the regeneration 417 and the regenerated individual fat return pipe 18 is installed from the thunder lO to Kozue-JA! According to the present invention as described above, the anion exchange resin is introduced into the column while the unsalted liquid passes upward through the column. −
Because it is stored for a long time, the fruit juice stock solution can be subjected to chain acid treatment without causing the clogging that occurs in East AFI.Therefore, there is no need to swim away solid VLJ such as pulp in advance, and no extra pretreatment process is required. Therefore, there is no resin contamination, the operation is easy, and the IM fat can be easily regenerated in a sanitary manner.

An example of a friend experiment is shown below using the Jitsun Kencho shown in Fig. 1.

Experimental example Unshiyuu mandarin juice 101] and %? Using a-an fruit juice, it is used as a strongly salted anion or as a substitute for Kokushu, manufactured by Mitsubishi Chemical Corporation.
) was used to treat spasticity using the apparatus of the present invention shown in FIG. The results are shown in (a) 2 and (c) of Table 1. For comparison, the results of a conventional example in which the same resin was used and the fruit juice stock solution was passed downward are shown in Part 1 (b).

Also, 100% Unshiyu Yokan fruit juice from the same company, 500 yen
Table 2 shows the results obtained by adding 1A deer 22 flashes and 1 plan to y and processing them using the conventional Nomatsuchi method.

(Left below) 2nd coating (acidity removal rate 41.5%) From the above results, the conventional lower f
IF port), the acid removal rate was only about 40% compared to the patch method, and on the other hand, when the device of the present invention was used in the upward flow, the pulp content was less green. This shows that although the preprocessing is unsophisticated, the processing is comparable to the Nototsuchi method.

[Brief explanation of drawings]

FIG. 1 is an explanatory diagram of approximately four cross sections showing an example of the uninvention, and FIG. 21A is a flow sheet when regenerating sludge on a continuous surface. l・-・Scabbard tower 3・Standard solution supply means 4・
・・Meaning for coexistence of nitric fat 9・・・Means for supplying nitric fat 11・・・Means for discharging the anion exchange resin F 14°・・・Means for supplying nitric fat 14°・・Anion exchange fat layer 17・・Regeneration Tower Patent Applicant: Kurita Maintenance Co., Ltd.

Claims (1)

[Scope of Claims] 1. A stock solution supply means provided near the bottom end of the purification tower for supplying the fruit juice stock solution into the tower, and a stock solution supply means provided near the top end of the tower for supplying the distilled liquid to the outside of the tower. A finger fluid discharge means to take out, an anion exchange resin supply means provided below the purified liquid discharge means, and an anion exchange resin supply means provided above the stock solution supply means and below the anion exchange resin supply means for discharging dangerous ions. exchange resin discharge means, the citrus fruit juice supplied into the tower is purified by coming into contact with the anion exchange resin layer when it passes upward through the anion exchange resin layer. - Fruit juice acid reduction device. 2. The citrus juice apparatus according to claim 1, wherein the anion exchange resin layer forms a fluidized bed.