JP2005081199A - Ion exchange resin filter - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide an ion exchange resin filter for uniformizing ion exchange capacity of an ion exchange resin. <P>SOLUTION: In this ion exchange resin filter 1, the ion exchange resin 4 is packed in a filter case 3, and a raw liquid is passed from one end to the other end for treatment. A movable plate 10 serving as an expanding means for expanding a space for containing the ion exchange resin 4 between water-permeable plates 5 and 6, and an actuator 14 are provided. The ion exchange resin 4 is agitated by a vibration plate 12 in the expanded space during expanding the space. <P>COPYRIGHT: (C)2005,JPO&NCIPI

Description

  The present invention relates to an ion exchange resin filter incorporated in liquid treatment facilities such as pure water production and condensate treatment of a fuel cell.

  Conventionally, a horizontally installed ion exchange resin filter that prevents the formation of a gap in the upper layer portion of a pellet-like ion exchange resin filled in a filter case has been proposed (see Patent Document 1).

This is because even if the volume of the ion exchange resin changes, a pellet-shaped ion exchange resin is pressed by a coil spring, which is an elastic member, with a water-permeable pack member that can prevent the passage of the ion exchange resin in the filter case. Thus, a gap is not generated between the filter case and the ion exchange resin, thereby preventing the function of the ion exchange filter from being lowered.
JP 2001-252576 A

  However, in the above-described conventional example, the frequency of contact with the passing liquid is different between the ion exchange resin in the central part of the filter case and the ion exchange resin in the peripheral part, so that the ion exchange ability is not uniform. For this reason, some of the ion exchange resins have reached the end of their life when they are replaced as having no ion exchange capacity (life) due to the liquid passing through the filter dropping below the conductivity control value. On the other hand, there are cases where the ion exchange resin in the filter case is exchanged with an unused new ion exchange resin in a state where there is still an unused ion exchange resin.

  Then, this invention is made | formed in view of the said problem, and it aims at providing the ion exchange resin filter which can make the ion exchange capability of an ion exchange resin uniform.

  The present invention is an ion exchange resin filter in which a filter case is filled with pellet-shaped ion exchange resin, and a raw solution is passed from one end to the other end for processing, and the volume of a space for accommodating the ion exchange resin is expanded. Volume expanding means and means for stirring the ion exchange resin in the expanded space during operation of the volume expanding means are provided.

  Therefore, in the present invention, the ion exchange resin is stirred in the expanded space by the stirring means during the expansion of the space volume in which the pellet-shaped ion exchange resin is accommodated by the volume expanding means. The ion exchange reaction is performed in a state where the used ion exchange resin is uniformly mixed, the ion exchange resin can be used uniformly, and it can be used without leaving an unused ion exchange resin. The frequency can be lowered and the space can be used effectively.

  Hereinafter, an ion exchange resin filter of the present invention will be described based on each embodiment.

(First embodiment)
FIG. 1 is a cross-sectional view showing a first embodiment of an ion exchange resin filter to which the present invention is applied.

  In FIG. 1, an ion exchange resin filter 1 includes a cylindrical filter case 3, a pair of water permeable plates 5, 6 disposed in the filter case 3 at intervals, and both the water permeable plates 5, 6. A packed pellet-shaped ion exchange resin 4, a movable plate 10 slidably disposed on the filter case 3 and capable of pressing one water permeable plate 6 against the ion exchange resin 4 via an elastic body 11, and a filter The case 3 is composed of a diaphragm 12 that vibrates together with the contents.

  The filter case 3 has a cylindrical shape in which one side is closed by a side wall 3A and the other side is open, and the side wall 3A includes a liquid outlet 3B. In the case 3, the other water permeable plate 5, the ion exchange resin 4, one water permeable plate 6, the elastic body 11, and the movable plate 10 are housed in this order from the side wall 3 </ b> A. The filter case 3 is elastically supported by the liquid hose by connecting a liquid inlet 3C provided on the movable plate 10 and a liquid outlet 3B provided on the side wall 3A of the case 3 to a liquid hose (not shown).

  Both the water permeable plates 5 and 6 allow the passage of liquid, but prevent the ion exchange resin 4 from passing through and prevent the ion exchange resin 4 from flowing out between the two water permeable plates 5 and 6. Function.

  The ion exchange resin 4 is in the form of a pellet, and either a cation exchange resin or an anion exchange resin that undergoes an ion exchange reaction with the liquid in contact with it is used, but a mixed bed type may also be used. The ion exchange resin 4 is compressed by the two water permeable plates 5 and 6 whose distance is narrowed by the pressing force from the elastic body 11 when the system is operated, and the processing liquid is circulated in a state where the gaps between the pellets are filled. Apply, for example, when the system of the fuel cell system or the like is stopped, as will be described later, between the water permeable plates 5 and 6 whose distance is widened by the retreat of the movable plate 10, there is a gap in the upper layer portion in the filter case 3. It can be freely moved in the case 3 by an external force such as vibration.

  The movable plate 10 is slidable on the filter case 3 between an operating position where the distance between the two permeable plates 5, 6 is narrowed via an elastic body 11 and a stop position where the distance between the both permeable plates 5, 6 is widened. The liquid inlet 3C is provided at the center. The movable plate 10 is moved to the operating position by the actuator 14 controlled by the controller 13 in conjunction with the system operation, and is retracted to the stop position by the actuator 14 when the system is stopped.

  The diaphragm 12 is fixed to the filter case 3 and is activated and vibrated by the controller 13 when the system of the applied fuel cell system or the like is started to vibrate the filter case 3 elastically supported by the liquid hose.

  The operation of the ion exchange resin filter 1 having the above configuration will be described below.

  When a system such as a fuel cell system in which the ion exchange resin filter 1 is mounted is operating, the movable plate 10 is moved to the operating position (ion exchange resin side) by the controller 13 as shown in FIG. The other water permeable plate 6 is pressed through the elastic body 11 and the ion exchange resin 4 is pressed between the two water permeable plates 5 and 6 without any gap.

  The treatment liquid flows in from a liquid hose (not shown) via the liquid inlet 3C, passes through the gap between the elastic bodies 11, passes through one water permeable plate 6, the ion exchange resin 4, and the other water permeable plate 5. It flows out from the liquid outlet 3B. The liquid comes into contact with the ion exchange resin 4 to undergo an ion exchange reaction, and the ion exchange resin 4 does not move even in flowing water.

  When the system is stopped, the operation of the actuator 14 is released by the controller 13, the movable plate 10 is returned to the stop position, the pressing of the elastic body 11 is released, and the ion exchange resin 4 is filtered as shown in FIG. It accumulates in the lower part of case 3, and one water-permeable board 6 recedes. Next, water in the ion exchange resin filter 1 is drained by air purge, and the ion exchange resin 4 is swollen with water to prevent breakage due to drying.

  When the system is started again, the diaphragm 12 is vibrated by the controller 13 for a predetermined time, and at the same time, a liquid such as pure water is supplied from the liquid inlet 3C, and then the actuator 14 is activated by the controller 13. The ion exchange resin 4 in the case 3 is agitated as shown in FIG. 3 by the vibration of the diaphragm 12 and the supply of the liquid, so that the unused part and the used part are mixed and the bias is eliminated.

  After a predetermined time has elapsed, the vibration is stopped, the actuator 14 is operated by the controller 13, and the movable plate 10 is moved to the ion exchange resin 4 side to be in the operating position, and the system is returned to the operating state shown in FIG. Is done.

  In the present embodiment, the following effects can be achieved.

  (A) In the ion exchange resin filter 1 in which the ion exchange resin 4 is filled in the filter case 3 and the stock solution is passed from one end to the other end for processing, the water permeable plate 5 is a space for accommodating the ion exchange resin 4. , 6 and a diaphragm 12 as a means for stirring the ion exchange resin 4 in the enlarged space during the operation of the volume expanding means. Therefore, the ion exchange reaction is performed in a state where the unused ion exchange resin 4 and the used ion exchange resin 4 are uniformly mixed, so that the ion exchange resin 4 can be used uniformly. The exchange resin 4 can be used without leaving it, the exchange frequency of the ion exchange resin 4 can be lowered, and the space can be used effectively.

  (A) The capacity of the elastic body 11 and the movable plate 10 as pressing means for pressing so that there is no gap between the ion exchange resins 4 when the filter is used as the volume expanding means, and retracting the movable body 10 to the stop position to release the operation. Therefore, the present invention can be easily applied to the existing ion exchange resin filter 1 only by making the support portion of the existing elastic body 11 movable.

  (C) Since the vibrating plate 12 that vibrates the filter case 3 is used as a stirring means, the ion exchange resin filter 1 can be easily vibrated by virtue of a simple structure, for example, by vibrating the plate by a motor. The resin 4 can be stirred.

  (D) When the diaphragm 12 vibrates, the ion exchange resins 4 move together with the flow of the liquid by using a stirring means that supplies the liquid from the inlet 3C and discharges the liquid in the space from the outlet 3B. The effect of (c) can be further enhanced.

(Second Embodiment)
FIG. 4 is a cross-sectional view showing a second embodiment of an ion exchange resin filter to which the present invention is applied. In this embodiment, the ion exchange resin is stirred and mixed only by introducing a liquid. The same devices as those in FIG. 1 are denoted by the same reference numerals, and description thereof will be omitted or simplified.

  4, the ion exchange resin filter 1 of the present embodiment is different from the first embodiment in the positions of the liquid inlet 3C and the liquid outlet 3B provided in the filter case 3 and the structures of the water permeable plates 7 and 8 provided in the inlet and outlet. The other filter case 3, ion exchange resin 4, elastic body 11 and movable plate 10 have the same configuration as in the first embodiment.

  The liquid inlet 3 </ b> C is disposed so as to open at the bottom of the filter case 3, and the water permeable plate 7 is disposed at a portion where the liquid inlet 3 </ b> C opens into the case 3. Further, the liquid outlet 3B is arranged to be opened at the upper part of the filter case 3, and the water permeable plate 8 is arranged at a part where the liquid outlet 3B opens to the inside of the case 3. In the operating state, the ion exchange resin 4 is sandwiched between the water permeable plates 5 and 6 in the first embodiment. However, in the present embodiment, the ion exchange resin is formed between the water impermeable plate 9 and the case side wall 3A during operation. 4 is inserted.

  In the ion exchange resin filter 1 having the above configuration, when the system in which the ion exchange resin filter 1 is mounted is in operation, the movable plate 10 is moved to the operating position (ion exchange resin by the controller 13 as shown in FIG. 4), the non-permeable plate 9 is pressed through the elastic body 11, and the ion exchange resin 4 is pressed between the case side wall 3A without any gap. The treatment liquid flows into the case 3 from a liquid hose (not shown) via the liquid inlet 3C below the case 3 and the water permeable plate 7, and above the case 3 via the ion exchange resin 4 and the other water permeable plate 8. Out of the liquid outlet 3B. The liquid comes into contact with the ion exchange resin 4 to undergo an ion exchange reaction, and the ion exchange resin 4 does not move even in flowing water.

  When the system is stopped, the operation of the actuator 14 is released by the controller 13, the movable plate 10 is returned to the stop position, the pressing of the elastic body 11 is released, and the ion exchange resin 4 is filtered as shown in FIG. The water-impermeable plate 9 is retracted by accumulating in the lower part of the case 3. Next, water in the ion exchange resin filter 1 is drained by air purge, and the ion exchange resin 4 is swollen with water to prevent breakage due to drying.

  When the system is started again, a liquid such as pure water is supplied from the liquid inlet 3 </ b> C, and then the actuator 14 is activated by the controller 13. When the ion exchange resin 4 in the case 3 is supplied with liquid, as shown in FIG. 6, the ion exchange resin 4 is lifted by the flow of the liquid and released from the lower part of the case 3, stirred, and the unused part and the used part are mixed. That bias is eliminated.

  After a predetermined time has elapsed, the actuator 14 is operated by the controller 13, and the movable plate 10 is moved to the ion exchange resin 4 side to be in the operating position, and the system is returned to the operating state shown in FIG.

  In the present embodiment, in addition to the effects (a) and (b) in the first embodiment, the following effects can be achieved.

  (E) Since the liquid is supplied from the inlet 3C into the enlarged space and discharged from the outlet 3B as the stirring means to cause the liquid to flow in the space, the arrangement of the liquid outlets 3B and 3C For example, the internal ion exchange resin 4 can be stirred with a simple structure in which the liquid inlet 3C is disposed at the lower part of the filter case 3 and the liquid outlet 3B is disposed at the upper part of the filter case 3, for example.

  In each of the above embodiments, the elastic body 11 and the movable plate 10 as the pressing means for pressing so that there is no gap between the ion exchange resins 4 when the filter is used as the volume expanding means are retracted to the stop position to release the operation. Although the description has been given of the one that expands the accommodation volume by doing so, although not shown, the volume of the space that accommodates the ion exchange resin is temporarily enlarged even if such a holding means is not provided. If so, it may be enlarged in the radial direction of the filter case.

  In each of the above embodiments, as the stirring means, those using vibration and those using liquid flow have been described. However, although not shown, mechanical means may be used.

  Further, in each of the above embodiments, the description has been given of the one that operates the volume expanding means when the system is stopped and the stirring means when the system is started, but not shown, but immediately after the system is stopped, when the system is started, or when the system is operated Both of the above means may be operated, and both the above means are periodically operated every predetermined operating time without always operating the both means immediately after the system is stopped or when the system is started. There may be.

Sectional drawing of the ion exchange resin filter which shows one Embodiment of this invention. Sectional drawing of the ion exchange resin filter at the time of a system stop similarly. Sectional drawing of the ion exchange resin filter at the time of system starting similarly. Sectional drawing of the ion exchange resin filter which shows 2nd Embodiment of this invention. Sectional drawing of the ion exchange resin filter at the time of a system stop similarly. Sectional drawing of the ion exchange resin filter at the time of system starting similarly.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Ion exchange resin filter 3 Filter case 4 Ion exchange resin 5, 6, 7, 8 Water-permeable board 9 Water-impermeable board 10 Movable board (water-impermeable)
11 Elastic body 12 Diaphragm 13 Controller 14 Actuator

Claims (4)

In the ion exchange resin filter that is filled with pellet-shaped ion exchange resin inside the filter case and processed by passing the stock solution from one end to the other,
Volume expansion means for expanding the volume of the space for accommodating the ion exchange resin;
An ion exchange resin filter, comprising: means for stirring the ion exchange resin in an enlarged space during the operation of the volume expanding means.   2. The ion exchange according to claim 1, wherein the volume expanding means expands the accommodation volume by opening a pressing means that presses the ion exchange resin so that there is no gap between the ion exchange resins when used as a filter. Resin filter.   The ion-exchange resin filter according to claim 1 or 2, wherein the stirring means vibrates a filter case. 4. The method according to claim 1, wherein the stirring means supplies liquid from the inlet to the enlarged space and discharges liquid in the space from the outlet to cause the liquid to flow in the space. The ion exchange resin filter as described in any one.

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