WO2017159812A1 - イオン交換装置及びその使用方法 - Google Patents
イオン交換装置及びその使用方法 Download PDFInfo
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- WO2017159812A1 WO2017159812A1 PCT/JP2017/010750 JP2017010750W WO2017159812A1 WO 2017159812 A1 WO2017159812 A1 WO 2017159812A1 JP 2017010750 W JP2017010750 W JP 2017010750W WO 2017159812 A1 WO2017159812 A1 WO 2017159812A1
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- Prior art keywords
- exchange tank
- ion exchange
- tank
- cation exchange
- anion exchange
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01J—CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS
- B01J47/00—Ion-exchange processes in general; Apparatus therefor
- B01J47/02—Column or bed processes
- B01J47/022—Column or bed processes characterised by the construction of the column or container
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01J—CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS
- B01J47/00—Ion-exchange processes in general; Apparatus therefor
- B01J47/02—Column or bed processes
- B01J47/026—Column or bed processes using columns or beds of different ion exchange materials in series
- B01J47/028—Column or bed processes using columns or beds of different ion exchange materials in series with alternately arranged cationic and anionic exchangers
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01J—CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS
- B01J49/00—Regeneration or reactivation of ion-exchangers; Apparatus therefor
- B01J49/05—Regeneration or reactivation of ion-exchangers; Apparatus therefor of fixed beds
- B01J49/08—Regeneration or reactivation of ion-exchangers; Apparatus therefor of fixed beds containing cationic and anionic exchangers in separate beds
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- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F1/00—Treatment of water, waste water, or sewage
- C02F1/006—Water distributors either inside a treatment tank or directing the water to several treatment tanks; Water treatment plants incorporating these distributors, with or without chemical or biological tanks
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F1/00—Treatment of water, waste water, or sewage
- C02F1/42—Treatment of water, waste water, or sewage by ion-exchange
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F1/00—Treatment of water, waste water, or sewage
- C02F1/42—Treatment of water, waste water, or sewage by ion-exchange
- C02F2001/422—Treatment of water, waste water, or sewage by ion-exchange using anionic exchangers
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F1/00—Treatment of water, waste water, or sewage
- C02F1/42—Treatment of water, waste water, or sewage by ion-exchange
- C02F2001/425—Treatment of water, waste water, or sewage by ion-exchange using cation exchangers
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F2103/00—Nature of the water, waste water, sewage or sludge to be treated
- C02F2103/02—Non-contaminated water, e.g. for industrial water supply
- C02F2103/04—Non-contaminated water, e.g. for industrial water supply for obtaining ultra-pure water
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F2103/00—Nature of the water, waste water, sewage or sludge to be treated
- C02F2103/34—Nature of the water, waste water, sewage or sludge to be treated from industrial activities not provided for in groups C02F2103/12 - C02F2103/32
- C02F2103/346—Nature of the water, waste water, sewage or sludge to be treated from industrial activities not provided for in groups C02F2103/12 - C02F2103/32 from semiconductor processing, e.g. waste water from polishing of wafers
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F2201/00—Apparatus for treatment of water, waste water or sewage
- C02F2201/002—Construction details of the apparatus
- C02F2201/004—Seals, connections
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F2303/00—Specific treatment goals
- C02F2303/16—Regeneration of sorbents, filters
Definitions
- the present invention is a two-bed one-column regenerative pure water production apparatus comprising an anion exchange resin and a cation exchange resin. About.
- raw water is passed through an apparatus equipped with a tower filled with an ion exchange resin, for example, to remove various components contained in the raw water.
- a column packed with an ion exchange resin used for pure water production in addition to a mixed bed column in which a cation exchange resin and an anion exchange resin are mixed and packed in one column, a positive column is used.
- a positive column is used.
- multi-bed towers in which ion exchange resins and anion exchange resins are packed in separate towers.
- FIG. 1 there is a single tower type (see FIG. 1) in which a cation exchange resin and an anion exchange resin are laminated via a partition plate in the same tower. Since the one-column type has a simple device configuration, a single-column type device shown in FIG. 1 has been conventionally employed (see, for example, Patent Document 1). As described above, when raw water is passed through a pure water production apparatus composed of a cation exchange resin and an anion exchange resin, ions in the raw water are removed by the action of the cation exchange resin and the anion exchange resin. Is obtained.
- the maintenance management (maintenance) of the pure water production apparatus is also desired to have a structure that allows maintenance personnel and the like to enter the apparatus and check the resin filling status from the outside of the apparatus. It was rare.
- the ion exchange device described in Patent Document 1 is a tower for an ion exchange device in which an ion exchange resin is filled, and an upper chamber and a lower chamber are provided by providing a partition plate curved in a water-proof convex shape inside. And is provided with supply / discharge piping for supplying or discharging liquid to and from the upper chamber and the lower chamber, communication means for supplying / discharging the liquid, and opening / closing means for the communication pipe.
- a water collection / distribution member (collection / distribution pipe) that allows water to pass but blocks the passage of ion exchange resin is disposed in the upper chamber upper part, upper chamber lower part, lower chamber upper part and lower chamber lower part, respectively.
- These water collecting / distributing members and the upper water collecting / distributing member have a shape along the partition plate, and the upper upper portion and the lower upper portion are filled with granular inert resin.
- this device has the following problems. 1) Some water collection and distribution members have a shape like an umbrella bone extending radially from the center to the periphery along the partition plate. In such a case, the interval between the collection and distribution pipes is wider in the peripheral portion than in the central portion, and a staying portion is likely to occur. Since this tendency becomes prominent when the apparatus is enlarged, the processing capacity is limited. 2) The inert resin filled in the upper and upper chambers is provided for the purpose of improving the efficiency of the regeneration of the ion exchange resin. The height of the exchange device had to be increased.
- the two-column type apparatus in which the anion exchange resin and the cation exchange resin are packed in separate towers has the following problems. 1) It is necessary to separately install a column packed with an anion exchange resin and a column packed with a cation exchange resin. Usually, these columns are installed side by side. For this reason, it is necessary to secure a place necessary for installing these towers, and it is difficult to secure a sufficiently large place for installing the apparatus in a limited processing facility. 2) When connecting the towers by piping, the structure in which the towers are arranged side by side increases the length of the piping, and the structure becomes complicated, making it difficult to manage the facility.
- the present invention has been made in view of the above circumstances, and an object of the present invention is to provide an apparatus that is easy to maintain despite having a compact size that requires a small installation area. Another object is to provide an apparatus having a large raw water treatment capacity. Still another object is to provide an apparatus that can efficiently regenerate the ion exchange resin.
- anion exchange tank an anion exchange resin
- cation exchange tank a tank filled with a cation exchange resin
- the two-bed / one-column apparatus of the above-mentioned is installed with either one of the cation exchange tank and the anion exchange tank on the upper side and the other on the lower side, and keeps the space between the anion exchange tank and the cation exchange tank.
- the area occupied by the ion exchange device can be reduced, and it can be efficiently operated in the factory as a single tower integrating the anion exchange tank and the cation exchange tank. Furthermore, the present inventors have found that an apparatus that is easier to maintain can be provided.
- the ion exchange apparatus of the present invention comprises: An ion exchange apparatus comprising an anion exchange tank filled with an anion exchange resin on the upper side and a cation exchange tank filled with a cation exchange resin on the lower side,
- the anion exchange tank and the cation exchange tank each independently have an outer shell composed of an outer convex end plate provided on the upper and lower parts and a support on the side of the ion exchange tank.
- the anion exchange tank and the cation exchange tank are communicated by communication means outside these ion exchange tanks, A supply / discharge pipe for supplying or discharging the liquid to the upper part of the anion exchange tank and a supply / discharge pipe for supplying or discharging the liquid to the lower part of the cation exchange tank;
- the communication means includes a first communication pipe for supplying and discharging liquid to and from the lower part of the anion exchange tank, A second communication pipe for supplying and discharging liquid to and from the upper part of the cation exchange tank; A third communication pipe communicating the first communication pipe and the second communication pipe; Opening and closing means for the third communication pipe; Regenerative liquid supply / discharge means respectively provided in the first communication pipe and the second communication pipe; With On the flat plate, a water collecting and distributing member that allows water to pass but prevents passage of the ion exchange resin is disposed, The supply / exhaust piping at the upper part of the anion exchange resin is disposed, The supply / exhaust piping at the upper part of the anion
- the present invention is an ion exchange apparatus comprising a cation exchange tank filled with a cation exchange resin on the upper side and an anion exchange tank filled with an anion exchange resin on the lower side,
- a cation exchange tank filled with a cation exchange resin on the upper side and an anion exchange tank filled with an anion exchange resin on the lower side
- Each of the cation exchange tank and the anion exchange tank independently has an outer shell constituted by an outer end convex plate provided on the upper part and the lower part and a support on the side part of the ion exchange tank.
- the cation exchange tank and the anion exchange tank are communicated by communication means outside these ion exchange tanks, A supply / discharge pipe for supplying or discharging the liquid to the upper part of the cation exchange tank and a supply / discharge pipe for supplying or discharging the liquid to the lower part of the anion exchange tank;
- the communication means is A first communication pipe for supplying and discharging liquid to the lower part of the cation exchange tank;
- a second communication pipe for supplying and discharging liquid to and from the upper part of the anion exchange tank;
- a third communication pipe communicating the first communication pipe and the second communication pipe; Opening and closing means for the third communication pipe;
- Regenerative liquid supply / discharge means respectively provided in the first communication pipe and the second communication pipe;
- the apparatus of the present invention is installed as a variation of the water-impervious flat plate of the water collecting and distributing member at regular intervals on a plurality of concentric circles spaced apart from the central portion of the flat plate so that the vertical and horizontal intervals are constant on the flat plate.
- the water collecting and distributing member has a conical shape, it is installed so as to protrude in a conical shape toward the ion exchange resin layer side of the flat plate, and when the water collecting and distributing member has a cylindrical shape, it is installed so as to protrude from both the front and back surfaces of the flat plate can do.
- the water collecting and distributing member has a cylindrical shape
- a granular inert resin is filled between the flat plate and the ion exchange resin layer, and the water collecting and distributing member above the anion exchange tank and the water collecting and distributing member above the cation exchange tank Each have a layer embedded in an inert resin.
- the cross-sectional shapes of the anion exchange tank and the cation exchange tank are substantially circular, and preferably the cross-sectional diameters of the anion exchange tank and the cation exchange tank are the same length. It has a predetermined diameter.
- the diameter of the cross section is not particularly limited, it is preferably 500 mm or more, and preferably 3000 mm or less from the relationship between the amount of treated water and the linear velocity (LV).
- the anion exchange resin layer and the cation exchange resin layer preferably have a predetermined height.
- the distance between the lower end of the anion exchange tank and the upper end of the cation exchange tank, or the distance between the lower end of the cation exchange tank and the upper end of the anion exchange tank may have a predetermined distance.
- a linear velocity (LV) of 50 m / hr (hours) is used in order to float the raw water into the cation exchange tank and treat the ion exchange resin.
- the ion exchange apparatus of the present invention has the following effects. 1) Since the installation area is small and the size is small, a large amount can be allocated to the production part in the factory, and the facility can be used effectively. 2) Since the raw water treatment capacity is large, it can be applied even when a large amount of high-purity pure water such as a semiconductor manufacturing factory is used. 3) Since the regeneration of the ion exchange resin can be performed efficiently, the rise of pure water production after the regeneration treatment is quick and efficient operation is possible.
- FIG. 2 is a schematic cross-sectional view showing a one-column type ion exchange apparatus in which a cation exchange resin and an anion exchange resin are laminated on one tower via a partition plate, which is a conventional technique.
- FIG. 2 is a schematic cross-sectional view showing an ion exchange apparatus provided with an anion exchange tank above the tower and a cation exchange tank below, according to the present invention.
- FIG. 2a is an example in which the shape of the water collecting and distributing member (strainer) is a conical shape.
- 2b is an example of a cylindrical shape.
- FIG. 3 is a schematic cross-sectional view showing an ion exchange apparatus having a cation exchange tank above the tower and an anion exchange tank below, according to the present invention
- FIG. 3A is an example in which the shape of the water collection and distribution member (strainer) is conical.
- 3b is an example of a cylindrical shape.
- FIG. 4 is a schematic cross-sectional view of the apparatus during ion exchange treatment of raw water (treated water) using the ion exchange apparatus of the present invention (FIGS. 4a and 4c) and during resin regeneration (FIGS. 4b and 4d).
- 4a and 4b are examples in which the shape of the water collection and distribution member (strainer) is conical
- FIGS. 4c and 4d are examples in which the shape is cylindrical.
- FIG. 5A and 5B are schematic cross-sectional views showing a state before assembly (FIGS. 5a, 5b, c-1, and c-2) and a state after assembly (FIG. 5d) in which the conical water collection and distribution member is installed on a flat plate
- FIG. 5c-2 is an enlarged view of the member 7a of FIG. 5a
- FIG. 6A is an enlarged cross-sectional view of the cylindrical water collecting and distributing member installed on a flat plate (FIG. 6 a), and a portion where the cylindrical water collecting and distributing member on the side surrounded by the upper and lower flat plates protrudes from an inert resin (inert resin).
- FIG. 7 is a schematic view showing a state in which a water collecting / distributing member is installed on a flat plate, and is a schematic view showing variations (FIGS. 7a to 7d) of installation positions of the water collecting / distributing member.
- a black rhombus ( ⁇ ) shows the result of a new resin, and a horizontal axis (X axis) is water flow time. (Minute) and vertical axis (Y-axis) indicate TOC concentration (unit: ppb as C).
- FIG. 2 as an example of the apparatus of the present invention, an ion exchange apparatus (1) provided with an anion exchange tank (2) filled with an anion exchange resin on the upper side and a cation exchange tank (3) filled with a cation exchange resin on the lower side. ).
- the anion exchange tank (2) constituting a part of the ion exchange device (1) of the present invention includes a barrel (2b) at the side of the anion exchange tank with the cylindrical axis direction as a vertical direction, and a top end plate (5a). ) And the bottom end plate (5b) constitute an outer shell.
- the cation exchange tank (3) which comprises a part of ion exchange apparatus (1) of this invention consists of the trunk
- the above-mentioned end plate (5a) and end plate (5c) are convexly curved upward, and the end plate (5b) and end plate (5d) are convexly curved downward.
- the anion exchange tank (2) is divided into three chambers, an upper chamber (13a), an anion exchange resin filling chamber (2a), and a lower chamber (13b) by an upper water-impervious flat plate (6a) and a lower flat plate (6b). It is partitioned.
- the cation exchange tank (3) is composed of an upper chamber (13c), a cation exchange resin filling chamber (3a), and a lower chamber (13d) by an upper water-impervious flat plate (6c) and a lower flat plate (6d). It is divided into.
- the flat plate 6 (6a to 6d) is made of a metal or synthetic resin that does not allow water to pass through at all, and has a planar structure.
- the first water collection / distribution member (7a) is disposed on the flat plate (6a) separating the upper chamber (13a) and the anion exchange resin filling chamber (2a) of the anion exchange tank (2), and the water collection / distribution water on the upper chamber (13a) side.
- the member (7a1) and the water collecting / distributing member (7a2) on the side of the anion exchange resin filling chamber (2a) are disposed so as to penetrate the flat plate (6a), and the upper chamber (13a) of the first water collecting / distributing member (7a) )
- Side water collection / distribution member (7a1) communicates with the upper supply / discharge pipe (10a) whose end is connected to the end plate (5a) via the upper chamber (13a).
- the second water collecting / distributing member (7b) is disposed on the flat plate (6b) that partitions the lower chamber (13b) and the anion exchange resin filling chamber (2a) of the anion exchange tank (2), and the lower chamber (13b) side collects and distributes water.
- the member (7b1) and the water collecting / distributing member (7b2) on the side of the anion exchange resin filling chamber (2a) are disposed so as to penetrate the flat plate (6b), and the lower chamber (13b) of the second water collecting / distributing member (7b) )
- Side water collection / distribution member (7b1) communicates with the first communication pipe (9a) whose end is connected to the end plate (5b) via the lower chamber (13b).
- the cation exchange tank (3) is the same as the anion exchange tank (2) and will be described below.
- a third water collection / distribution member (7c) is provided on the flat plate (6c) that partitions the upper chamber (13c) and the cation exchange resin filling chamber (3a) of the cation exchange tank (3), and the water collection / distribution water on the upper chamber (13c) side.
- the member (7c1) and the water collecting / distributing member (7c2) on the side of the anion exchange resin filling chamber (3a) are disposed so as to penetrate the flat plate (6c), and the upper chamber (13c) of the third water collecting / distributing member (7c) ) Side water collection / distribution member (7c1) communicates with the second communication pipe (9b) whose end is connected to the end plate (5c) via the upper chamber (13c).
- a fourth water collection / distribution member (7d) is provided on a flat plate (6d) that partitions the lower chamber (13d) and the cation exchange resin filling chamber (3a) of the cation exchange tank (3), and the water collection / distribution water on the lower chamber (13d) side.
- the member (7d1) and the water collecting / distributing member (7d2) on the side of the anion exchange resin filling chamber (3a) are disposed so as to penetrate the flat plate (6d), and the lower chamber (13d) of the fourth water collecting / distributing member (7d) )
- Side water collection / distribution member (7d1) communicates with the lower supply / discharge pipe (10b) whose end is connected to the end plate (5d) via the lower chamber (13d).
- the flat plate (6b) below the anion exchange tank (2) and the cation exchange tank (2) constituting a part of the ion exchange apparatus (1) having an anion exchange tank above the tower and a cation exchange tank below the tower of the present invention.
- the column body (8a) whose vertical direction is the cylinder axis, and the lower plate (6d) below the cation exchange tank (3) A tower body (8b) is installed in which the cylinder axis direction is the vertical direction.
- the tower body (8a) and the tower body (8b) support the anion exchange tank (2) and the cation exchange tank (3) of the ion exchange device (1) of the present invention and connect the pipes shown above. Can be supported.
- the first communication pipe (9a) communicates with the water collection / distribution member (7b1) on the lower chamber (13b) side of the second water collection / distribution member (7b) via the lower chamber (13b).
- the first communication pipe (9a) is supported at a predetermined position of the tower body (8a), and is a regenerated liquid of the raw water introduced through the cation exchange tank (3) and an anion exchange resin. Used to discharge aqueous sodium hydroxide (NaOH).
- the second communication pipe (9b) communicates with the water collecting / distributing member (7c1) on the upper chamber (13c) side of the third water collecting / distributing member (7c) through the upper chamber (13c).
- the second communication pipe (9b) is supported at a predetermined position of the tower body (8a), discharges raw water that has passed through the cation exchange tank (3), and hydrochloric acid (HCl) that is a regenerated solution of the cation exchange resin. ) Used to introduce aqueous solution.
- the pipe (10b) communicates with the water collection / distribution member (7d1) on the lower chamber (13d) side of the fourth water collection / distribution member (7d) via the lower chamber (13d).
- a second water collection and distribution member (7b) is installed on the flat plate (6b) below the anion exchange tank (2), and the water collection and distribution member (7b1) on the lower chamber (13b) side of the second water collection and distribution member (7b). ) Is connected to the first communication pipe (9a) via the lower chamber (13b).
- the 3rd water collection / distribution member (7c) is installed in the flat plate (6c) above a cation exchange tank (3), and the 3rd water collection / distribution member of the upper chamber (13c) side of this 3rd water collection / distribution member (7c) (7c1) is connected to the second communication pipe (9b) via the upper chamber (13c). Further, the first communication pipe (9a) and the second communication pipe (9b) are connected to each other outside the tower of the ion exchange device (1) through the third communication pipe (9c). (Not shown in FIG. 2, see FIG. 3). A valve (11a) is installed in the communication pipe (9c).
- a valve (11b) and a valve (11c) as a supply / discharge unit for the regenerated liquid are installed at the end portions of the first communication pipe (9a) and the second communication pipe (9b). And at the time of raw
- the member supporting the anion exchange tank (2) and the cation exchange tank (3) is supported by, for example, only an aggregate (framework) other than the tower body (8a), or an angle
- the anion exchange tank (2) and / or the cation exchange tank (3) as a whole may be provided with a holding member that can be stably held.
- FIG. 3 shows an upper direction as an example of the apparatus of this invention.
- the schematic of the ion exchange apparatus (1) provided with the cation exchange tank (3) filled with the cation exchange resin in FIG. 1, and the cation exchange tank (2) filled with the anion exchange resin below is shown.
- the arrangement of the ion exchange tank is different from that of the apparatus of FIG. 2, the piping and other aspects can be understood in accordance with the apparatus of FIG.
- the valve (11b) and the valve (11c) are closed, and raw water (treated water) is supplied from the supply / discharge pipe (10b) below the cation exchange tank (3).
- the raw water includes a lower chamber (13d) of the cation exchange tank (3), a water collection / distribution member (7d), a cation exchange resin filling chamber (3a), and an inert resin (4b when a cylindrical water collection / distribution member is used).
- the upper chamber (13a) and the anion exchange tank (3) flow in the order of the supply / discharge pipe (10a) and are taken out as treated water (deionized water).
- FIG. 3b shows a flow of regeneration of the used anion exchange resin filled in the anion exchange resin filling chamber (2a) and the used cation exchange resin filled in the cation exchange resin filling chamber (3a).
- the alkaline solution is supplied from the supply / discharge pipe (10a) to the upper chamber (13a) of the anion exchange tank (2), the water collection / distribution member (7a), (inert resin (4a) when a cylindrical water collection / distribution member is used).
- the anion exchange resin filling chamber (2a), the water collecting and distributing member (7b), the lower chamber (13b) of the anion exchange tank (2), the first communication pipe (9a), and the pipe 9d flow in this order to regenerate waste water (alkali) As a result, the anion exchange resin in the anion exchange resin filling chamber (2a) is regenerated.
- the acid solution passes from the pipe 9e through the second communication pipe 9b to the upper chamber (13c) of the cation exchange tank (3), the water collecting / distributing member (7c), and (in the case of using a cylindrical water collecting / distributing member, an inert resin. (4b)), cation exchange resin filling chamber (3a), water collection and distribution member (7d), lower chamber (13d) of cation exchange tank (3), supply / exhaust pipe (10b) at the bottom of cation exchange tank (3) It flows out and flows out as reclaimed waste water (acid), whereby the cation exchange resin in the cation exchange resin filling chamber (3a) is regenerated.
- the anion exchange tank (2) and the cation exchange tank (3) are arranged downward while the anion exchange tank (2) and the cation exchange tank (3) are independent from each other.
- the cation exchange tank (3) is disposed above and the anion exchange tank (2) is disposed below.
- the anion exchange tank (2) and / or the cation exchange tank (3) are supported by a holder such as a tower body (8a) or a framework. By setting it as such a structure, an installation space can be small rather than making an anion exchange tank (2) and a cation exchange tank (3) horizontally.
- the piping which connects an anion exchange tank (2) and a cation exchange tank (3) is also short.
- the height of these resin layers is set. By devising it, the height of the tower can be made as low as possible. Furthermore, since the ion exchange tanks are arranged at the top and bottom, maintenance and management of the ion exchange apparatus can be performed efficiently.
- FIG. 3 shows an upper direction as an example of the apparatus of this invention.
- the schematic of the ion exchange apparatus (1) provided with the cation exchange tank (3) filled with the cation exchange resin in FIG. 1, and the cation exchange tank (2) filled with the anion exchange resin below is shown.
- the arrangement of the ion exchange tank is different from that of the apparatus of FIG. 2, the piping and other aspects can be understood in accordance with the apparatus of FIG.
- inert resins (4a) and (4b) are provided above the anion exchange resin filling chamber (2a) and the cation exchange resin filling chamber (3a), respectively.
- the flow of the cation exchange resin and the anion exchange resin is prevented, and the liquid is evenly contacted with the cation exchange resin and the anion exchange resin at the time of water sampling and regeneration, so that high-quality deionized water is used. Can be obtained and reproduction can be performed sufficiently.
- the end plate (5b) at the bottom of the anion exchange tank (2) and the end plate (5c) at the top of the cation exchange tank (3) are communicated via a pipe (communication means).
- the means may be outside each ion exchange resin tank of the ion exchange device.
- the tower body provided with the tower body (8) it may be outside the tower body, but may be arranged below the ion exchange tank in the tower body if space is allowed.
- three valves (11a), (11b), and (11c) are used.
- the flow path switching may be performed using two three-way valves.
- the conical water collecting / distributing member can be arranged in a state (cross-sectional enlarged view) installed on the flat plate.
- the conical water collecting / distributing member has a conical water collecting / distributing part having a male screw-like convex portion as shown in FIG. 5a and a female screw-like concave portion that can be fitted to the convex portion as shown in FIG. Both can be fixed from both sides of the flat plate as in 5b.
- the male screw-like convex portion shown in FIG. 5a has a hollow inside, and the hollow portion has a structure through which a regenerating liquid such as raw water or NaOH or HCl can pass.
- the reason for (i) is that the raw water or regenerated liquid is actually collected and distributed at the inclined portion (umbrella-shaped portion) of the conical shape, and the distance between the apex of the conical shape and the flat plate is relatively small, That is, since the height of the cone shape is low, water is collected and distributed not only from the apex portion but also from the entire inclined portion. Therefore, since the area of the portion related to the collection and distribution water becomes relatively large, the pressure loss due to the flow of raw water and the extrusion of reclaimed water can be relatively small. For this reason, even if it is a large flow rate at the time of raw water treatment or regeneration, liquid can be smoothly passed, which is suitable for mass treatment and quick regeneration.
- the reason for the problem (ii) is that if the regenerated waste liquid remains after the regeneration treatment, the ion exchange resin does not work properly, and it is necessary to produce the regenerated waste liquid promptly.
- the distance between the apex of the conical shape and the flat plate is relatively small, that is, the height of the conical shape is low, so that the recycled wastewater is drained not only from the apex but also from the entire inclined part. It becomes.
- the base of the cone is connected to the flat plate in a generally planar manner, the structure is not configured to collect the regenerated waste liquid. For this reason, the regenerated waste liquid is quickly discharged and can be regenerated in a short time, and the ion exchange apparatus can be operated efficiently.
- the cylindrical water collecting and distributing member may be arranged in a state (cross-sectional enlarged view) installed on a flat plate.
- the method of fixing the cylindrical water collecting / distributing member to the flat plate is the same as that of the conical water collecting / distributing member.
- the portion where the cylindrical water collecting and distributing member on the side surrounded by the upper and lower flat plates protrudes may be arranged as a state filled with inert resin (inert resin) (cross-sectional enlarged view).
- the collection and distribution members are installed on the flat plate in consideration of various factors such as the size and shape of the collection and distribution member, the ion exchange device, the size of the flat plate, and the amount of raw water treatment required.
- the number of members and the installation pattern can be determined as appropriate.
- the ion exchange apparatus of this invention installs a water collection / distribution member on a flat plate at predetermined intervals in order to improve raw water treatment capacity. For this reason, as shown in FIG. 7a, the water collecting / distributing member is installed on a plurality of concentric circles spaced apart from the central portion of the flat plate at regular intervals, or at regular intervals vertically and horizontally on the flat plate. It is good to install like this.
- the flat plate center point of the water-impervious plate is uniformly arranged in the vertical and horizontal directions, or the flat plate center point is included in FIG.
- FIG. 7d it is possible to exemplify a mode in which the plates are evenly arranged on a concentric circle having a fixed interval from the flat plate center point.
- the water collecting and distributing member it is installed so as to protrude in a conical shape toward the flat plate ion exchange resin layer side, or when the water collecting and distributing member has a cylindrical shape, it protrudes from both sides of the flat plate. It is good to install in.
- a granular inert resin may be filled between the flat plate and the ion exchange resin layer.
- the water collection / distribution member above the anion exchange tank and the water collection / distribution member above the cation exchange tank are in the inert resin. It is possible to take an embodiment having a layer embedded in the substrate. When installing a cylindrical water collection / distribution member, the protrusion part of a water collection / distribution member arises between a flat plate and an ion exchange resin layer.
- the anion exchange resin or the cation exchange resin when filled so as to embed the protruding portion of the water collection / distribution member, the vicinity of the inlet of the water collection / distribution member (for example, the anion exchange tank and the cation exchange tank of FIG. Raw water enters the water collection / distribution member from the vicinity of the lower end of each upper water collection / distribution member), and the anion exchange resin or cation exchange resin above the lower end of the water collection / distribution member cannot substantially participate in ion exchange and is wasted. There is a risk that.
- the water collecting / distributing member has a structure that allows water to pass through but blocks the passage of ion exchange resin, but if raw water is passed, it first contacts the lower end of the water collecting / distributing member as raw water flow. This is because the raw water flows in a concentrated manner at the lower end portion of the water collection and distribution member. For this reason, as shown in FIG.
- the anion exchange resin and the cation exchange resin above the lower end of the water collecting and distributing member are filled with an inert resin as a dummy resin having no ion exchange action, so that expensive ions can be obtained.
- an exchange resin can be used effectively.
- the inert resin a polyethylene or polypropylene resin having a specific gravity smaller than that of the ion exchange resin is used.
- the particle size of the inert resin is preferably larger than that of the ion exchange resin.
- the ion exchange apparatus tower which covers the anion exchange tank (2) lower part and the cation exchange tank (3) upper part by making the cross-sectional diameter of an anion exchange tank (2) and a cation exchange tank (3) into the same length.
- the body trunk (8) is installed, and the ion exchange device (1) has robustness.
- the layer height of the anion exchange resin layer may be 500 mm to 2000 mm, more preferably 750 mm to 1500 mm, and the layer height of the cation exchange resin layer may be 400 mm to 800 mm, more preferably 500 mm to 750 mm.
- the layer height of the anion exchange resin layer may be 1.5 to 2.5 times, more preferably about twice the layer height of the cation exchange resin layer.
- the ion exchange apparatus includes an anion exchange tank (2) on a cation exchange tank, and a tower body (8) covering the lower part of the anion exchange tank (2) and the upper part of the cation exchange tank (3). It is provided. Furthermore, the distance between the lower end of the anion exchange tank (2) and the upper end of the cation exchange tank (3) is preferably 500 mm to 1000 mm. This structure allows maintenance personnel to enter the equipment for equipment maintenance and management, making it easier to properly manage the equipment, introducing raw water or reclaimed liquid, and discharging treated water and reclaimed waste liquid. Necessary piping can be installed in the space below the anion exchange tank (2) and the top of the cation exchange tank (3), and the apparatus can be made compact.
- the maintenance of the ion exchange apparatus (1) can be observed from the outside of the apparatus, such as the resin filling status and the operating status inside the apparatus.
- a window provided with a transparent material such as transparent resin and glass, and an ion exchange resin supply port and a discharge port for exchanging the resin filled therein.
- the size, shape, and installation position of the window, ion exchange resin supply and discharge ports should be designed and applied as appropriate, and the transparent material of the window should be strong enough not to interfere with operation or regeneration. Good.
- the ion exchange apparatus of the present invention can be sufficiently treated.
- the regeneration time can be shortened by increasing the flow rate, and the working efficiency of the raw water treatment can be improved.
- the following may be used as a guide for the amount of water flow relative to the tower diameter of the ion exchange device.
- Example 1 Production of pure water by the ion exchange apparatus of the present invention Pure water was produced under the following conditions using the apparatus shown in FIG. 2a.
- BTC: B ⁇ 1 ng / L 0.43 mg-B / LR TOC: 10 ppb Ion exchange resin;
- Cation exchange tank: SV 150 / h (hours)
- Anion exchange tank: SV 75 / h (hours)
- Regeneration conditions NaOH: 4.0% by mass
- Example 2 Effect of Strainer Installation
- the device shown in FIG. 2a uses the conical water collecting / distributing member shown in FIG. 5 or the cylindrical water collecting / distributing member shown in FIG. 6 under the same conditions as in Example 1.
- the recovered water was supplied to the resin under the above water flow conditions, and the specific resistance value of the water to be treated was measured.
- a cylindrical water collecting and distributing member was used, as shown in FIG. 6b, both the case where the inert resin layer was installed and the case where it was not installed were carried out.
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Abstract
Description
このように、陽イオン交換樹脂と陰イオン交換樹脂から構成される純水製造装置に原水を通水すると、原水中のイオンが陽イオン交換樹脂および陰イオン交換樹脂の作用により除去され、純水が得られる。
さらに、当該純水製造装置の保守管理(メンテナンス)には、保守要員等が装置に入りこめると共に、装置の外から中の樹脂充填状況等を確認できるような構造を有する装置であることも望まれていた。
1)集配水部材は仕切板に沿って中心から周辺部へと放射状に広がる傘の骨のような形状をしているものがある。このような場合、中心部に比較して周辺部では集配水管同士の間隔が広くなり、滞留部が生じやすくなる。この傾向は装置を大型化した場合に顕著になるため、処理能力に限界があった。
2)上室上部及び下室上部に充填された不活性樹脂はイオン交換樹脂の再生の効率化などの目的で設けられているが、不活性樹脂が充填される分、その容積に応じてイオン交換装置の高さを高くする必要があった。
1)陰イオン交換樹脂を充填した塔と陽イオン交換樹脂を充填した塔を別々に設置する必要があり、通常はこれらの塔を横に並べて設置する。このため、これらの塔を設置するのに必要な場所を確保する必要があり、限られた処理施設内で装置を設置するにあたり十分に広い場所を確保することが難しかった。
2)塔間を配管により連通させる場合、塔を横に並べた構成では配管の長さが長くなると共に、その構造も複雑となって施設の管理が難しくなりうるものであった。
本発明のイオン交換装置は、
上方にアニオン交換樹脂が充填されたアニオン交換槽と、下方にカチオン交換樹脂が充填されたカチオン交換槽とを備えたイオン交換装置であって、
前記アニオン交換槽及び前記カチオン交換槽は、各々独立して、上部と下部に備えられた外側に凸状である鏡板とイオン交換槽側部の支持体により外殻が構成され、かつ、上下二枚の平板により区画された上室、樹脂充填室及び下室を備えており、
前記アニオン交換槽と前記カチオン交換槽とは、これらのイオン交換槽の外側で連通手段により連通されており、
前記アニオン交換槽の上部に液を供給又は排出するための給排配管と前記カチオン交換槽の下部に液を供給又は排出するための給排配管とを備えており、
前記連通手段は、 前記アニオン交換槽の下部に液を給排するための第1の連通配管と、
前記カチオン交換槽の上部に液を給排するための第2の連通配管と、
前記第1の連通配管と前記第2の連通配管とを連通する第3の連通配管と、
前記第3の連通配管の開閉手段と、
前記第1の連通配管及び前記第2の連通配管にそれぞれ設けられた再生液の給排手段と、
を備え、
前記平板には、水は通すがイオン交換樹脂の通過を阻止する集配水部材が配置され、
前記アニオン交換槽上部の給排配管、前記第1の連通配管、前記第2の連通配管および前記カチオン交換槽下部の給排配管、つまりそれらの末端が、前記アニオン交換槽および前記カチオン交換槽のそれぞれの上部と下部に設けられた鏡板に連通している、装置である。
前記カチオン交換槽及び前記アニオン交換槽は、各々独立して、上部と下部に備えられた外側に凸状である鏡板とイオン交換槽側部の支持体により外殻が構成され、かつ、上下二枚の平板により区画された上室、樹脂充填室及び下室を備えており、
前記カチオン交換槽と前記アニオン交換槽とは、これらのイオン交換槽の外で連通手段により連通されており、
前記カチオン交換槽の上部に液を供給又は排出するための給排配管と前記アニオン交換槽の下部に液を供給又は排出するための給排配管とを備えており、
前記連通手段は、
前記カチオン交換槽の下部に液を給排するための第1の連通配管と、
前記アニオン交換槽の上部に液を給排するための第2の連通配管と、
前記第1の連通配管と前記第2の連通配管とを連通する第3の連通配管と、
前記第3の連通配管の開閉手段と、
前記第1の連通配管及び前記第2の連通配管にそれぞれ設けられた再生液の給排手段と、
を備え、
前記平板には、水は通すがイオン交換樹脂の通過を阻止する集配水部材が配置され、
前記カチオン交換槽上部の給排配管、前記第1の連通配管、前記第2の連通配管および前記アニオン交換槽下部の給排配管、つまりそれらの末端が、前記カチオン交換槽および前記アニオン交換槽のそれぞれの上部と下部に設けられた鏡板に連通している、装置である。
本発明のアニオン交換槽およびカチオン交換槽を有するイオン交換装置の使用方法としては、原水をカチオン交換槽へ、イオン交換樹脂を浮上させて処理するために、線速度(LV)50m/hr(時間)以上で通水することが好ましい
1)設置面積が少なくてすむコンパクトな大きさであるため、工場内の生産部分に多くを割り当てることができ、施設の有効利用を図ることができる。
2)原水処理能力が大きいため、半導体製造工場のような高純度の純水を大量使用する場合にも適応できる。
3)イオン交換樹脂の再生を効率的に行なうことができるため、再生処理後の純水製造の立ち上がりが早く、効率的な運転ができる。
<イオン交換装置>
図2には、本発明の装置の一例として、上方にアニオン交換樹脂を充填したアニオン交換槽(2)、下方にカチオン交換樹脂を充填したカチオン交換槽(3)を備えたイオン交換装置(1)の概略図を示す。
また本発明のイオン交換装置(1)の一部を構成するカチオン交換槽(3)は、筒軸心方向を鉛直方向としたカチオン交換槽の側部の胴(3b)と、頂部の鏡板(5c)と、底部の鏡板(5d)とによって外殻が構成されている。上記の鏡板(5a)と鏡板(5c)は上に凸に湾曲し、鏡板(5b)と鏡板(5d)は下に凸に湾曲している。
アニオン交換槽(2)の上室(13a)とアニオン交換樹脂充填室(2a)とを区画する平板(6a)に第1の集配水部材(7a)が、上室(13a)側の集配水部材(7a1)とアニオン交換樹脂充填室(2a)側の集配水部材(7a2)とで平板(6a)を貫通するように配置され、この第1の集配水部材(7a)の上室(13a)側の集配水部材(7a1)は上室(13a)を介して、末端が鏡板(5a)に接続された上部給排配管(10a)と連通している。
カチオン交換槽(3)の上室(13c)とカチオン交換樹脂充填室(3a)とを区画する平板(6c)に第3の集配水部材(7c)が、上室(13c)側の集配水部材(7c1)とアニオン交換樹脂充填室(3a)側の集配水部材(7c2)とで平板(6c)を貫通するように配置され、この第3の集配水部材(7c)の上室(13c)側の集配水部材(7c1)は上室(13c)を介して、末端が鏡板(5c)に接続された第2の連通配管(9b)と連通している。
具体的には、第2の集配水部材(7b)の下室(13b)側の集配水部材(7b1)に、下室(13b)を介して、第1の連通配管(9a)が連通しているが、この第1の連通配管(9a)は塔体胴(8a)の所定位置で支持されて、カチオン交換槽(3)を通過した原水の導入及び、アニオン交換樹脂の再生液である水酸化ナトリウム(NaOH)水溶液の排出に使用される。
さらに、第4の集配水部材(7d)の下室(13d)側の集配水部材(7d1)に、下室(13d)を介して、配管(10b)が連通しているが、この配管(10b)は塔体胴(8a)の所定位置で支持されて、原水の導入及び、カチオン交換樹脂の再生液である塩酸(HCl)水溶液の排出に使用される。
<連通配管の切替>
アニオン交換槽(2)の下方の平板(6b)に第2の集配水部材(7b)が設置され、この第2の集配水部材(7b)の下室(13b)側の集配水部材(7b1)は下室(13b)を介して第1の連通配管(9a)と接続されている。また、カチオン交換槽(3)の上方の平板(6c)に第3の集配水部材(7c)が設置され、この第3の集配水部材(7c)の上室(13c)側の集配水部材(7c1)は上室(13c)を介して第2の連通配管(9b)と接続されている。さらに第1の連通配管(9a)と第2の連通配管(9b)とは、イオン交換装置(1)の塔体の外部にて、第3の連通配管(9c)を介して接続されている(図2には示さず、図3参照)。この連通配管(9c)に弁(11a)が設置されている。
そして、原水処理時は弁(11a)を開き、弁(11b)および弁(11c)を閉じた状態で処理を行う。樹脂再生時は、弁(11a)を閉じ、弁(11b)および弁(11c)を開いた状態で樹脂再生処理を行う。
また、上記態様ではアニオン交換槽(2)を上方に、カチオン交換槽(3)を下方に配置したイオン交換装置について説明しているが、図3には、本発明の装置の一例として、上方にカチオン交換樹脂を充填したカチオン交換槽(3)、下方にアニオン交換樹脂を充填したカチオン交換槽(2)を備えたイオン交換装置(1)の概略図を示す。図2の装置とはイオン交換槽の配置が異なっているものの、配管その他の態様は図2の装置に準じて理解することができる。
<イオン交換フロー>
本発明のイオン交換装置を用いた脱イオン水の生産(採水)時のフローを図4aに示す。第1の連通配管(9a)と第2の連通配管(9b)の末端部に、再生液の給排手段としての弁(11b)および弁(11c)を設けた場合、弁(11a)を開、弁(11b)および弁(11c)を閉とし、カチオン交換槽(3)下部の給排配管(10b)から原水(被処理水)を供給する。この原水は、カチオン交換槽(3)の下室(13d)、集配水部材(7d)、カチオン交換樹脂充填室(3a)、(円柱型集配水部材を使用する場合は不活性樹脂(4b))、集配水部材(7c)、上室(13c)、第2の連通配管(9b)、第3の連通配管(9c)、第1の連通配管(9a)、アニオン交換槽(2)の下室(13b)、集配水部材(7b)、アニオン交換樹脂充填室(2a)、(円柱型集配水部材を使用する場合は不活性樹脂(4a))、集配水部材(7a)、アニオン交換槽(2)の上室(13a)、アニオン交換槽(3)上部の給排配管(10a)の順に流れ、処理水(脱イオン水)として取り出される。
<集配水部材>
上記したように、集配水部材(7)を円錐形状のものを使用することで不活性樹脂(4)は不要とでき、アニオン交換槽(2)中の樹脂層の高さをカチオン交換槽(3)中の樹脂層の高さの1.5~2.5倍程度、好ましくは2倍程度とするとよい。ただし、本発明において、集排水部材(7)として円錐形状のものを使用した場合であっても、不活性樹脂を用いた場合を排除するものではなく、下記の通り、必要に応じて不活性(イナート)樹脂を充填して使用すればよい。
円錐型集配水部材は図5aに示すように雄ネジ様の凸部を有した円錐形状の集配水部品と図5cに示すような凸部に嵌合できる雌ネジ様の凹部を有し、図5bのように平板の両側から両者を固定することができる。ここで、図5aに示す雄ネジ様の凸部では、その内部が中空を有し、当該中空部分を原水あるいはNaOH、HClといった再生液が通過できる構造とするのがよい。
(i)の理由として、実際に原水あるいは再生液を集配水するのは、円錐形状の内の傾斜部分(傘形状部分)であるところ、比較的円錐形状の頂点と平板との距離が小さく、すなわち円錐形状の高さが低いため、頂点部分のみならず傾斜部分全体から集配水されることとなる。従って、集配水に関与する部分の面積が比較的大きくなるため、原水の通液や再生水の押出による圧力損失も比較的少なくてすむこととなる。このため、原水処理時や再生時の大流量であっても円滑に通液でき、大量処理、速やかな再生に適している。
集配水部材の平板への固定方法については特に制限はなく、上記の尾ネジと雌ネジによる固定のみならず、接着剤を使って固定してもよい。さらに、金属製などの材質によってはハンダ、溶接によって固定することもできる。固定化されたものが図5dに示す状態である。
この中で、本発明のイオン交換装置は、原水処理能力を向上させるために、集配水部材を平板に所定間隔で設置したものである。このため、集配水部材の平板への設置は、図7aに示すように平板の中心部から一定間隔離れた複数の同心円上に一定間隔毎に設置したり、平板上に縦横に一定間隔となるように設置するとよい。
また集配水部材の形状にもよるが、平板のイオン交換樹脂層の側へ円錐形状にて突き出すように設置したり、集配水部材が円筒形状を有する場合には、平板の表裏両面から突き出すように設置するとよい。
円筒形状の集配水部材を設置する場合、平板とイオン交換樹脂層の間に集配水部材の突出部分が生じる。その場合、アニオン交換樹脂又はカチオン交換樹脂を集配水部材の当該突出部分を埋設するように充填すると、原水処理時においては集配水部材の入り口付近(例えば図4bのアニオン交換槽及びカチオン交換槽のそれぞれの上方の集配水部材の下端付近)から原水が集配水部材へ入りこみ、集配水部材の下端より上方のアニオン交換樹脂又はカチオン交換樹脂は実質的にイオン交換に関与できず、無駄になってしまうおそれがある。
<装置構成の詳細>
本発明のイオン交換装置において、アニオン交換槽(2)およびカチオン交換槽(3)の断面が略円形状の場合、その直径を500mm~3000mmとするとよい。このような大きな直径を有するアニオン交換槽(2)およびカチオン交換槽(3)とすることで、原水処理量は極めて大きくなり、例えば半導体等の電子材料製造にも好適となる。
本発明においては、アニオン交換樹脂層の層高を500mm~2000mm、より好ましくは750mm~1500mmとするとよく、また、カチオン交換樹脂層の層高を400mm~800mm、より好ましくは500mm~750mmとするとよい。さらに、アニオン交換樹脂層の層高をカチオン交換樹脂層の層高の1.5倍~2.5倍、より好ましくはおおむね2倍とするとよい。
<イオン交換装置の使用方法>
本発明のイオン交換装置(1)の運転において、原水(被処理水)をカチオン交換槽(3)に、線速度(LV)で55m/hr(時間)以上、通常は55~75m/hr(時間)で通水するとよい。このような大流量の原水を流しても、本発明のイオン交換装置では十分に処理できる。また同様に再生液を導入する場合にも、流速を早めることで再生時間を短縮し、原水処理の作業効率を向上させることができる。
以下の実施例において、CaCO3、シリカ(SiO2)、ホウ素(B)の量は以下により分析した。
分析装置;アジレント・テクノロジー株式会社製 ICP-MS Agilent7500
分析方法はJIS K-0133に準拠して行った。
TOC濃度は GE 社製装置(型式 シーバス500RLe )を使用して測定した。
比抵抗値は 東亜DKK 社製装置(型式 MX-4 )を使用して測定した。
図2aに示す装置を用い、以下の条件で純水を製造した。
原水(被処理水)水質;
ホウ素 :80ng/L
IC :1mg/L as CaCO3
SiO2:20μg/L
Na :1mg/L as CaCO3
Cl :0.4mg/L as CaCO3
ホウ素BTC:B≦1ng/L=0.43mg-B/L-R
TOC :10ppb
イオン交換樹脂;
カチオン交換樹脂:ダウ・ケミカル社製MONOSPHERE 650C UPW(H) アニオン交換樹脂:ダウ・ケミカル社製MONOSPHERE 550A UPW(OH)
不活性樹脂:ダウ・ケミカル社製IF-62
通水条件;
カチオン交換槽:SV=150/h(時間)
アニオン交換槽:SV=75/h(時間)
再生条件(再生液濃度);
NaOH:4.0質量%
HCl :4.0質量%
装置の大きさ
アニオン交換槽の直径;700mm
アニオン交換樹脂層の高さ;1000mm
カチオン交換槽の直径;700mm
カチオン交換樹脂層の高さ;500mm
新品樹脂に上記通水条件にて原水を給水した後、使用したイオン交換樹脂に対して上記再生液を用いて再生30分、超純水により押し出しを30分行った。その後、原水を用いて洗浄を15分実施した後、引き続き原水を通水して、洗浄終了後を起点とした通水時間ごとのTOC濃度を測定した。
実施例2 ストレーナー設置の影響
図2aに示す装置に、図5で示される円錐形状の集配水部材または、図6で示される円筒形状の集配水部材を用い、実施例1と同じ条件でイオン交換樹脂に上記通水条件にて回収水を給水し、被処理水の比抵抗値を測定した。なお円筒形状の集配水部材を用いた場合は、図6bで示されるように、不活性樹脂層を設置した場合と設置しなかった場合の両方を実施した。
2 アニオン交換槽
2a アニオン交換樹脂充填室
2b アニオン交換槽円筒部
3 カチオン交換槽
3a カチオン交換樹脂充填室
3b カチオン交換槽円筒部
4a、4b 不活性樹脂
5a、5b、5c、5d 鏡板
6a、6b、6c、6d 平板
7a、7b、7c、7d 集配水部材
8 イオン交換装置塔体胴
8a イオン交換装置上側胴
8b イオン交換装置下側胴
9a 第1の連通配管
9b 第2の連通配管
9c 第3の連通配管
9d、9e 配管
10a アニオン交換槽上部配管
10b カチオン交換槽下部配管
11a、11b、11c 弁(バルブ)
12 集配水部材設置用孔
13a アニオン交換槽上室
13b アニオン交換槽下室
13c カチオン交換槽上室
13d カチオン交換槽下室
Claims (12)
- 上方にアニオン交換樹脂が充填されたアニオン交換槽と、下方にカチオン交換樹脂が充填されたカチオン交換槽とを備えたイオン交換装置であって、
前記アニオン交換槽及び前記カチオン交換槽は、各々独立して、上部と下部に備えられた外側に凸状である鏡板とイオン交換槽側部の支持体により外殻が構成され、かつ、上下二枚の平板により区画された上室、樹脂充填室及び下室を備えており、
前記アニオン交換槽と前記カチオン交換槽とは、これらのイオン交換槽の外側で連通手段により連通されており、
前記アニオン交換槽の上部に液を供給又は排出するための給排配管と前記カチオン交換槽の下部に液を供給又は排出するための給排配管とを備えており、
前記連通手段は、
前記アニオン交換槽の下部に液を給排するための第1の連通配管と、
前記カチオン交換槽の上部に液を給排するための第2の連通配管と、
前記第1の連通配管と前記第2の連通配管とを連通する第3の連通配管と、
前記第3の連通配管の開閉手段と、
前記第1の連通配管及び前記第2の連通配管にそれぞれ設けられた再生液の給排手段と、
を備え、
前記平板には、水は通すがイオン交換樹脂の通過を阻止する集配水部材が配置され、
前記アニオン交換槽上部の給排配管、前記第1の連通配管、前記第2の連通配管および前記カチオン交換槽下部の給排配管が、前記アニオン交換槽および前記カチオン交換槽のそれぞれの上部と下部に設けられた鏡板に連通している、
イオン交換装置。 - 上方にカチオン交換樹脂が充填されたカチオン交換槽と、下方にアニオン交換樹脂が充填されたアニオン交換槽とを備えたイオン交換装置であって、
前記カチオン交換槽及び前記アニオン交換槽は、各々独立して、上部と下部に備えられた外側に凸状である鏡板とイオン交換槽側部の支持体により外殻が構成され、かつ、上下二枚の平板により区画された上室、樹脂充填室及び下室を備えており、
前記カチオン交換槽と前記アニオン交換槽とは、これらのイオン交換槽の外側で連通手段により連通されており、
前記カチオン交換槽の上部に液を供給又は排出するための給排配管と前記アニオン交換槽の下部に液を供給又は排出するための給排配管とを備えており、
前記連通手段は、
前記カチオン交換槽の下部に液を給排するための第1の連通配管と、
前記アニオン交換槽の上部に液を給排するための第2の連通配管と、
前記第1の連通配管と前記第2の連通配管とを連通する第3の連通配管と、
前記第3の連通配管の開閉手段と、
前記第1の連通配管及び前記第2の連通配管にそれぞれ設けられた再生液の給排手段と、
を備え、
前記平板には、水は通すがイオン交換樹脂の通過を阻止する集配水部材が配置され、
前記カチオン交換槽上部の給排配管、前記第1の連通配管、前記第2の連通配管および前記アニオン交換槽下部の給排配管が、前記カチオン交換槽および前記アニオン交換槽のそれぞれの上部と下部に設けられた鏡板に連通している、
イオン交換装置。 - 前記集配水部材が、前記平板の中心部から一定間隔離れた複数の同心円上に一定間隔毎に設置されている、請求項1または請求項2記載のイオン交換装置。
- 前記集配水部材が、前記平板上に縦横に一定間隔となるように設置されている、請求項1または請求項2記載のイオン交換装置。
- 前記集配水部材が、前記平板の該イオン交換樹脂層の側へ略円錐形状にて突き出すように設置されている、請求項1~4のいずれかに記載のイオン交換装置。
- 前記集配水部材が略円筒形状を有し、前記平板の表裏両面から突き出すように設置されている、請求項1~4のいずれかに記載のイオン交換装置。
- 前記平板と前記イオン交換樹脂層の間に、粒状の不活性樹脂が充填されており、アニオン交換槽上部の集配水部材及びカチオン交換槽上部の集配水部材がそれぞれ前記不活性樹脂中に埋設された層を有する、請求項5または請求項6に記載のイオン交換装置。
- 前記アニオン交換槽および前記カチオン交換槽の断面が略円形状であって、直径300mm~3000mmである、請求項1または請求項2記載のイオン交換装置。
- 前記アニオン交換槽と前記カチオン交換槽との断面直径が同じ長さである、請求項1または請求項2記載のイオン交換装置。
- 前記アニオン交換樹脂層の層高が500mm~2000mmである、請求項1または請求項2記載のイオン交換装置。
- 前記カチオン交換樹脂層の層高が500mm~1000mmである、請求項1または請求項2記載のイオン交換装置。
- 原水をカチオン交換槽に、イオン交換樹脂を浮上させて処理するように、線速度(LV)50m/hr(時間)以上で通水する、請求項1~11のいずれかに記載のイオン交換装置の使用方法。
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