JP6535538B2 - Method of regenerating ion exchange resin - Google Patents

Description

  The present invention relates to a method of regenerating an ion exchange resin, and more specifically, a method of regenerating an ion exchange resin in which a regeneration solution is supplied to a regeneration processing tank containing an ion exchange resin having a reduced ion exchange capacity. About.

  Conventionally, an ion exchange resin is used to separate the ions contained in the solution, but this ion exchange resin loses its ion exchange capacity when a certain amount of ion exchange is carried out. Regeneration is performed by immersing in a regeneration solution containing exchange ions. As a regeneration method of this ion exchange resin, the regeneration solution is supplied from a regeneration solution tank containing a regeneration solution to a regeneration treatment tank containing an ion exchange resin having a reduced ion exchange capacity, and the regeneration solution passing through the ion exchange resin is There was one to be sent to the waste liquid tank (see, for example, Patent Document 1).

JP-A-7-270214

  However, in the thing of the above-mentioned patent document 1, after supplying a regeneration liquid to the regeneration processing tank which accommodated the ion exchange resin with which ion exchange capacity fell, it is made to stand still for a fixed time, and the ion exchange resin is regenerated. The standing time may be long.

  Then, an object of this invention is to provide the reproduction | regeneration method of the ion exchange resin which can aim at shortening of the reproduction | regeneration time of ion exchange resin.

In order to achieve the above object, according to the ion exchange resin regeneration method of the present invention, an ion exchange resin is supplied to a regeneration treatment tank containing an ion exchange resin with reduced ion exchange capacity to regenerate the ion exchange resin. In the resin regeneration method, the ion exchange resin with reduced ion exchange capacity is accommodated in the regeneration treatment tank to supply washing water, the ion exchange resin is washed with water, and the washing water after ion exchange resin washing is discharged. A first washing step; and a regenerating solution supply step of supplying the regenerating solution from the regenerating solution tank to the regenerating treatment tank after completion of the first rinsing step; circulating the regenerating solution supplied to the regenerating treatment tank; A regeneration step of regenerating the ion exchange resin, a stationary step of stopping the circulation of the regenerating solution after a lapse of a predetermined time, and allowing the solution to stand for a predetermined time; A regeneration liquid discharging step of discharging the regenerant of the reproduction processing tanks After the completion, after regeneration fluid discharge step is completed, to supply cleaning water to the reproduction processing tank, washed with water said ion exchange resin and then, And a second water-washing step of discharging the washing water after washing the ion exchange resin.

  According to the regeneration method of the ion exchange resin of the present invention, the regeneration step of circulating the regeneration solution supplied to the regeneration treatment tank to regenerate the ion exchange resin after the regeneration solution supply step of supplying the regeneration solution to the regeneration treatment tank As a result, the regeneration efficiency of the ion exchange resin can be enhanced, and the regeneration time can be shortened.

It is a systematic diagram of the ion exchange resin regeneration device which shows one embodiment of the present invention. It is explanatory drawing of the ion exchange resin reproduction | regeneration apparatus which supplies the wash water to the reproduction | regeneration processing tank by a 1st water washing process. It is explanatory drawing of the ion exchange resin reproduction | regeneration apparatus which is discharging | emitting wash water from the reproduction | regeneration processing tank by the 1st water washing process. It is explanatory drawing of the ion exchange resin reproduction | regeneration apparatus which is supplying the reproduction | regeneration liquid to the reproduction | regeneration processing tank at a reproduction | regeneration liquid supply process. It is explanatory drawing of the ion exchange resin reproduction | regeneration apparatus which circulates the reproduction | regeneration liquid at the reproduction | regeneration process. It is explanatory drawing of the ion exchange resin reproduction | regeneration apparatus which is discharging | generating the reproduction | regeneration liquid from the reproduction | regeneration processing tank at a reproduction | regeneration liquid discharge process. It is explanatory drawing of the ion exchange resin reproduction | regeneration apparatus which supplies the wash water to the reproduction | regeneration processing tank by a 2nd water washing process. It is explanatory drawing of the ion exchange resin reproduction | regeneration apparatus which has discharged | emitted the wash water from the reproduction | regeneration processing tank by the 2nd water washing process.

  FIG. 1 shows an embodiment of the ion exchange resin regeneration apparatus 11, which includes a regeneration treatment tank 13 containing an ion exchange resin 12 having a reduced ion exchange capacity, a regeneration solution tank 14 storing a regeneration solution, and washing. A water supply tank 15 for storing water, and a waste liquid tank 16 for holding waste liquid from the regeneration processing tank 13. The regeneration processing tank 13 includes an introduction path 13a for introducing the ion exchange resin 12 and the ion exchange resin 12. A lead-out path 13b for lead-out is provided.

  A water supply passage 17 is provided between the regeneration processing tank 13 and the water supply tank 15, and a water supply valve 18 is provided in the water supply passage 17. A drainage path 19 is provided between the lower part of the regeneration processing tank 13 and the waste liquid tank 16, and the drainage path 19 has an outlet valve 20 on the regeneration processing tank 13 side and a waste liquid discharge valve 21 on the waste tank 16 side. Each is provided, and a drawing pump 22 is disposed between the outlet valve 20 and the waste liquid discharge valve 21. A regeneration solution supply path 23 for supplying regeneration solution is provided between the upper portion of the regeneration solution tank 14 and the upper portion of the regeneration processing tank 13, and a supply valve 24 is provided in the regeneration solution supply path 23. The regenerating solution pump 25 is disposed between the regenerating solution tank 14 and the regenerating solution tank 14. Furthermore, between the upper part and the lower part of the regeneration processing tank 13, a circulation path 26 is provided, in which a part of the pipe is common to the drainage path 19, and the outlet valve 20 and the withdrawal pump 22 are common. An inlet valve 27 is provided on the upper side of the regeneration processing tank 13 of 26.

  When the ion exchange resin 12 whose ion exchange capacity has been reduced is regenerated by the ion exchange resin regeneration apparatus 11 described above, the ion exchange resin 12 whose ion exchange capacity has decreased is introduced into the regeneration treatment tank 13 via the introduction path 13a. After that, first, the first water washing step is performed. In the first washing step, as shown in FIG. 2, after the water supply valve 18 is opened and washing water is supplied from the water supply tank 15 to the regeneration processing tank 13 via the water supply path 17, as shown in FIG. The water supply valve 18 is closed, the outlet valve 20 and the waste liquid discharge valve 21 are opened, the drawing pump 22 is operated, and the drained water having the ion exchange resin 12 washed is sent to the waste liquid tank 16 via the drainage path 19.

  After completion of the first water washing step, a regenerating solution supply step is performed. In the regenerating solution supplying step, as shown in FIG. 4, the drawing pump 22 is stopped, the outlet valve 20 and the waste solution discharging valve 21 are closed, the supply valve 24 is opened, and the regenerating solution pump 25 is operated to supply the regenerating solution. The regeneration solution is sent to the regeneration processing tank 13 via the path 23. Also, at this time, the water supply valve 18 is opened as necessary to supply water to dilute the regenerating solution.

  Then, as shown in FIG. 5, a regeneration step is performed. In the regeneration process, the regeneration solution pump 25 is stopped, the supply valve 24 and the water supply valve 18 are closed, the outlet valve 20 and the inlet valve 27 are opened, the withdrawal pump 22 is operated, and the regeneration process tank 26 is operated. The regeneration solution withdrawn from the bottom of the tank 13 is again supplied from the top of the regeneration processing tank 13, and the ion exchange resin 12 is regenerated by the circulating regeneration solution. In addition, after the predetermined time has elapsed, the drawing pump 22 is stopped and allowed to stand for a predetermined time as needed.

  When regeneration of the ion exchange resin 12 is completed, as shown in FIG. 6, a regeneration solution discharging step is performed. In the regenerating solution discharging step, the inlet valve 27 is closed, the outlet valve 20 and the waste solution discharging valve 21 are opened, the drawing pump 22 is operated, and the regenerating solution in which the ion exchange resin 12 is circulated through the drainage path 19 is drained. Send to

  After the regenerating solution discharging step, the second water washing step is performed. In the second washing step, as shown in FIG. 7, the withdrawal pump 22 is stopped and the outlet valve 20 and the waste liquid discharge valve 21 are closed, and the water supply valve 18 is opened and the water supply tank 15 is opened similarly to the first washing step. After washing water is supplied to the regeneration processing tank 13 via the water supply path 17, as shown in FIG. 8, the water supply valve 18 is closed, the outlet valve 20 and the waste liquid discharge valve 21 are opened, and the drawing pump 22 is operated. The waste water obtained by cleaning the ion exchange resin 12 through the drainage path 19 is sent to the waste liquid tank 16, and the regenerated ion exchange resin 12 is drawn out through the lead path 13b.

  In the present embodiment, as described above, after the regenerating solution supply step of supplying the regenerating solution from the regenerating solution tank 14 to the regeneration processing tank 13, the regeneration solution supplied to the regeneration processing tank 13 is circulated to circulate the ion exchange resin 12 By providing the regeneration step of regenerating the ion exchange resin 12, the regeneration efficiency of the ion exchange resin 12 can be enhanced, and the regeneration time can be shortened.

  The ion exchange resin of the present invention is not limited, and the regenerating solution may be appropriately selected according to the ion exchange resin. Furthermore, if there is a difference in height between the regeneration processing tank and the regeneration solution tank, the regeneration solution pump can be omitted.

DESCRIPTION OF SYMBOLS 11 ... Ion exchange resin regeneration apparatus, 12 ... Ion exchange resin, 13 ... Regeneration processing tank, 14 ... Regeneration liquid tank, 15 ... Water supply tank, 16 ... Waste liquid tank, 17 ... Water supply path, 18 ... Water supply valve, 19 ... Drainage path , 20: outlet valve, 21: waste liquid discharge valve, 22: withdrawal pump, 23: regeneration liquid supply path, 24: supply valve, 25: regeneration liquid pump, 26: circulation path, 27: inlet valve

Claims (1)

In a regeneration method of an ion exchange resin, a regeneration solution is supplied to a regeneration treatment tank containing an ion exchange resin having a reduced ion exchange capacity to regenerate the ion exchange resin,
A first washing step of storing the ion exchange resin having reduced ion exchange capacity in the regeneration treatment tank to supply washing water, washing the ion exchange resin with water, and discharging washing water after washing of the ion exchange resin;
Supplying a regenerating solution from the regenerating solution tank to the regenerating treatment tank after the first washing step;
A regeneration step of recirculating the regeneration solution supplied to the regeneration treatment tank to regenerate the ion exchange resin;
A stationary step of stopping the circulation of the regenerating solution and allowing it to stand for a predetermined time after a predetermined time has elapsed from the regenerating step;
A regenerating solution discharging step of discharging the regenerating solution in the regenerating processing tank after completion of the stationary step;
After completion of the regenerating solution discharging step, the method further comprises the steps of: supplying washing water to the regeneration treatment tank, washing the ion exchange resin with water, and discharging the washing water after washing the ion exchange resin. A method of regenerating an ion exchange resin characterized by

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