JPH0114803B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a filtration device for removing ionic and insoluble impurities contained in a liquid.

Generally, when removing ionic and insoluble impurities contained in liquids such as water, an over-tank with a structure in which a water-flow support shelf installed in the tank is filled with granular ion-exchange resin to form a layer; A filtration tank in which a filtration element installed in the tank is precoated with particulate ion exchange resin, or a filtration device in which the two types of filtration tanks described above are combined are used. However, in the former configuration, insoluble impurities cannot be sufficiently removed due to the particle size of the ion exchange resin, and therefore a prefilter must be installed separately. In addition, in the latter configuration, the precoat layer often peels or cracks during water flow, and water is discharged without removing ionic and insoluble impurities. The problem was that the ion exchange resin had to be replaced with a new particulate ion exchange resin with the ion exchange function remaining high. Furthermore, in the above-mentioned filtration equipment that combines the two types of overtanks, two types of overtanks are used, which increases equipment costs and requires a large installation space.Furthermore, two types of ion exchange resins are required, making their management difficult. There were drawbacks such as complexity.

The present invention aims to solve the above-mentioned drawbacks of the over-tank, and also to provide a over-tank device which can remove ionic and insoluble impurities, and in which the material exchange operation can be carried out in parallel with the over-operation. This was obtained as a result of consideration for the purpose.

That is, the present invention installs at least three overtanks filled with ion-exchange fibers to form layers, is equipped with liquid sending pipes for exchanging the liquid to be treated, the processing liquid, and materials, and is equipped with a gate valve in each overtank. One of the overtanks mainly removes insoluble impurities and the other overtank mainly removes ionic impurities, and one of the overtanks is always used for material exchange. The purpose of the present invention is to provide a filtration device that allows the liquid feeding route to be changed.

FIG. 1 shows a schematic system diagram of an embodiment in which the processing liquid of the present invention is conveyed in series, and its configuration will be explained.

Each of the overflow tanks 1 to 4 has a partition body 6, 6' made of, for example, a perforated plate and a wire mesh installed in the tank body 5, and has a material filling part 7 forming a layer approximately in the center, and a first liquid on both sides thereof. It has a configuration in which a reservoir section 8 and a second liquid reservoir section 9 are formed. The liquid sending pipe 10 for the liquid to be treated is connected to the gate valve 1.
1, 13, 15, 17 and connecting pipes 12, 14, 1
6, 18 to the first liquid reservoir 8 of each tank 1 to 4.
It is connected to the tank body 5 so as to communicate with the tank body 5. The processing liquid feed pipe 19 is connected to the tank main body 5 so as to communicate with the second liquid storage section 9 of each overtank 1 to 4 via the connecting pipes 20, 22, 24, 26 and gate valves 21, 23, 25, 27.
It is connected to. Connecting pipe 12, 1 for feeding liquid to be treated
4, 16, 18 and connecting pipes 20, 2 for feeding processing liquid
2, 24, and 26 are connected via gate valves 37 to 40, respectively. The liquid sending pipe 28 for material exchange includes connecting pipes 29, 31, 33, 35 and gate valves 30, 32,
It is connected to the tank body 5 so as to communicate with the material filling section 7 of each of the overtanks 1 to 4 via 34 and 36. The liquid feeding pipe 41 for filling the material has gate valves 42, 44, 46,
48 and connecting pipes 43, 45, 47, and 49, it is connected to the tank body 5 so as to communicate with the second liquid storage section 9 of each tank 1 to 4. Liquid feed pipe 50 for extracting material
are connecting pipes 51, 53, 55, 57 and gate valve 5
It is connected to the tank body 5 so as to communicate with the material filling section 7 of each of the overtanks 1 to 4 via 2, 54, 56, and 58.

Figure 2 shows the opening/closing system diagram of the gate valve during material filling in the above-mentioned overprocessing device, Figure 3 shows the opening/closing system diagram of the gate valve during overprocessing, and the opening/closing system diagram of the gate valve during overprocessing and material exchange. are shown in FIGS. 4 and 5, and together with FIG. 1, the overprocessing operation will be explained.

First, when forming the layer 7' in each tank 1 to 4,
A predetermined amount of anionic and cationic ion exchange fibers are added to a liquid such as water to create a slurry, and as shown in FIG.
Open only 2. In this state, the above-mentioned slurry is sent to the liquid feeding pipe 28 by a pump (not shown), and the connecting pipe 2
9. The slurry is supplied from the gate valve 30 to the material filling section 7 of the overtank 1, and while the ion exchange fibers are deposited in the material filling section 7, the slurry that has passed through the partition body 6' formed of, for example, a perforated plate and a wire mesh, becomes a liquid. It is discharged from the outlet 9.

The slurry is sent from the gate valve 42 and the connecting pipe 43 to the liquid sending pipe 41 and returned to its original state, and is circulated until the ion exchange fibers in the slurry are exhausted, thereby forming the layer 7'. After forming the layer 7' in the overtank 1, the gate valves 30 and 42 are closed and the gate valves 32 and 44 are opened to circulate the slurry in the same manner as described above, thereby forming the layer 7' in the overtank 2.
to form. When using over tank 3, gate valves 34 and 46
When using the overtank 4, the gate valves 36 and 48 are opened and the slurry is circulated to form the respective layers 7'. When the formation of the layers 7' in each of the overtanks 1 to 4 is completed, all gate valves connected to the liquid feed pipes 28, 41, and 50 are closed to complete the layer formation operation.

When carrying out overtreatment using the above-mentioned overtreatment device, the gate valves 13, 27, 38, 39 are used as shown in FIG.
A path is formed in which the overtank 1 is not used because it is used for exchanging materials. In this state, the liquid containing ionic and insoluble impurities is supplied from the liquid sending pipe 10 to the gate valve 13 and the connecting pipe 14 to the first liquid reservoir 8 of the overflow tank 2. The liquid supplied to the first liquid reservoir 8 passes through a partition 6 made of, for example, a wire mesh and a perforated plate, and passes through a layer 7' formed of ion exchange fibers, in which most of the insoluble impurities and ionic impurities are removed. part of is removed. The liquid that has passed through the partition body 6' and exited to the second liquid reservoir 9 is transferred from the connecting pipe 22, the gate valve 38, and the connecting pipe 16 to the first liquid reservoir 8 of the overtank 3.
supply to. While the liquid supplied to the first liquid reservoir 8 passes through the layer 7', most of the insoluble impurities and ionic impurities that were not removed in the overtank 2 are removed. The liquid that has been filtered in the overtank 3 is supplied from the connecting pipe 24, the gate valve 39, and the connecting pipe 18 to the first liquid storage section 8 of the overtank 4, and the ionic impurities remaining in the layer 7' are removed. Ru. The overtreated liquid passes through the connecting pipe 26 and the gate valve 27 and is sent out from the liquid sending pipe 19 to a predetermined receiving tank (not shown).

When overtreatment is performed by the overtreatment device and the overtreatment device reaches a predetermined pressure difference, or when the quality of the treatment liquid reaches a predetermined value, the gate valves 15, 21, and Open bottles 39 and 40. In this state, the liquid containing ionic and insoluble impurities is supplied from the liquid feed pipe 10 to the gate valve 15 and the connecting pipe 16 to the first liquid reservoir 8 of the feed tank 3. Most of the insoluble impurities and some ionic impurities are removed from the liquid supplied to the first liquid reservoir 8 in the layer 7', and the liquid is sequentially sent to the filter tanks 4 and 1 to remove the remaining insoluble impurities and ions. sexual impurities are removed. At the same time as over-operating the liquid, the gate valves 32 and 54 are opened, and a liquid such as water is sent from the liquid feeding pipe 50 to the material filling section 7 of the overtank 2 from the connecting pipe 53 and the gate valve 54.
supply to. When the liquid is supplied to the material filling section 7, the ion-exchange fibers forming the layer 7' become slurry, which passes through the gate valve 32 and the connecting pipe 31 and is sent from the liquid supply pipe 28 to the cleaning tank, regeneration tank, or receiving tank (see Fig. (not shown).

A slurry of recycled or new ion exchange fibers is prepared in the empty material filling section 7, and as shown in FIG. 5, the gate valve 44 is opened and the gate valve 5 is closed.
Close 4. In this state, the slurry is supplied to the material filling section 7, and ion exchange fibers are deposited to form a layer 7'. After forming the layer 7', the gate valve 3
2 and 44 to complete the layer forming operation.

When overtreatment is performed as described above and the overtreatment device reaches a predetermined pressure difference, or when the quality of the treatment liquid reaches a predetermined value, the gate valve is operated to remove the liquid to be treated through the liquid supply pipe 10 for the first time. By sequentially changing the over-tank supplied to the material, the conversion operation into material can be carried out in parallel with the over-operation, and moreover, the over-tank which mainly removed ionic impurities can be used to mainly remove insoluble impurities. By using it as a filter tank, the ion exchange function of the ion exchange fibers of layer 7' is fully utilized effectively.

A schematic system diagram of another filtration device of the present invention in which processing liquids are fed in parallel is shown in FIG. 6 and will be described below.

The structure of the overflow tanks 1 to 4 is the same as that of the overflow apparatus shown in FIG. The liquid sending pipe 10 for the liquid to be treated is connected to the gate valve 1.
1, 13, 15, 17 and connecting pipes 59-62 to connect to the tank body 5 so as to communicate with the first liquid storage section 8 of each tank 1-4. Processing liquid feed pipe 19
are connected to the connecting pipes 59 to 62 via the gate valves 21, 23, 25, 27, and the liquid sending pipe 67 is connected to the second liquid through the connecting pipes 63 to 66 and the gate valves 42, 44, 46, 48. It is connected to the tank body 5 so as to communicate with the retaining part 9. The liquid feed pipe 28 for material exchange and the liquid feed 50 for material removal are connected to the tank body 5 so as to communicate with the material filling section 7 via the same gate valve and connecting pipe as in the case of the filtering device shown in FIG. be. The liquid feeding pipe 41 for filling the material is connected to each tank 1 via gate valves 68, 70, 72, 74 and connecting pipes 69, 71, 73, 75.
It is connected to the tank body so as to communicate with the first liquid storage section 8 of -4.

FIG. 7 shows an opening/closing system diagram of the gate valve at the time of over-operation in the above-mentioned second over-operation device, and the over-treatment will be explained in conjunction with FIG. 6.

The layer 7' of the overtank 1 is formed by leaving only the gate valves 30, 68 open and circulating the slurry of ion exchange fibers, and the layer 7' of the overtank 2 is formed by opening the gate valves 30, 68 and circulating the slurry of ion exchange fibers.
70 only, and the layer 7' of the overtank 3 has the gate valve 34,
Only the caps 72 are opened, and the slurry is circulated to form layers one after another.

For overtreatment, gate valves 13, 25, 27, 44, 4
Only ports 6 and 48 are opened to form a path in which the overtank 1 is not used for exchanging materials. In this state, the liquid containing ionic and insoluble impurities is supplied from the liquid sending pipe 10 to the gate valve 13 and the connecting pipe 60 to the first liquid reservoir 8 of the overflow tank 2, and the insoluble impurities are removed in the layer 7'. The liquid from which most of the impurities and some of the ionic impurities have been removed is sent from the second liquid reservoir 9 to the liquid supply pipe 67 through the gate valve 44 and the connecting pipe 64 to the connecting pipes 65 and 6.
6 and the gate valves 46 and 48 to the second
The liquid is supplied to the liquid reservoir section 9, respectively. In each layer 7' of the liquid, insoluble impurities and ionic impurities which were not removed in the overtank 2 are removed. The liquid that has been filtered in the filter tanks 3 and 4 is transferred to the connecting pipes 61 and 62 and the gate valve 2.
5 and 27, and is sent from the liquid sending pipe 19 to a predetermined receiving tank (not shown).

When the overtreatment device reaches a predetermined pressure difference during overtreatment of the liquid, or when the quality of the treated liquid reaches a predetermined value, the gate valves 13 and 2, which were opened in Fig. 7, are opened.
5, 44, and gate valves 15, 21,
42 is opened, and the liquid to be treated is supplied from the liquid supply pipe 10 to the first liquid storage section 8 of the overtank 3 via the gate valve 15 and the connecting pipe 61. The liquid from which most of the insoluble impurities and a part of the ionic impurities have been removed in the overtank 3 is sent to the overtanks 1 and 4, respectively, where the insoluble impurities and ionic impurities that were not removed in the overtank 3 are removed. removed. During the overtreatment, the gate valves 32 and 54 communicating with the overtank 2 are opened, and a liquid is supplied from the liquid supply pipe 50 to send out the ion exchange fibers forming the layer 7' in the form of a slurry. When the ion exchange fibers are sent out, the gate valve 54 is opened and the gate valve 70 is opened to supply a slurry of ion exchange fibers from the liquid feeding pipe to form the layer 7'.

Although the invention can be implemented as described above, it is not limited to the examples.

Although we have described an example in which Γ ion exchange fibers are filled, it is possible to increase the number of overtanks depending on the impurity concentration of the liquid to be treated, but it is possible to at least use an overtank for material exchange and mainly remove insoluble impurities. Three units are necessary: one for removing the ionic impurities, and the other for removing mainly ionic impurities.

ΓThe liquid sending pipes, connecting pipes, and gate valves for each liquid are arranged so that the processing liquid is sent in series or in parallel depending on the condition of the liquid to be processed.

A Γ filter tank can be implemented with a structure in which the inside of the tank is partitioned with layers and the liquid is passed through horizontally, but it is also possible to use one in which the tank is partitioned with layers and the liquid is passed through it in the vertical direction, or one in which a cylindrical layer is formed and the liquid is passed through the tank. It is also possible to use a structure in which the liquid is allowed to pass through the layer.

As described above, the present invention installs at least three overtanks filled with ion-exchange fibers to form layers, and also pipes liquid sending pipes for the liquid to be treated, the processing liquid, and the overexchange, and partitions each overtank. They are connected through valves, and one of the tanks removes mainly insoluble impurities and the other tank mainly removes ionic impurities, and one of the tanks is always used for material exchange. By making it possible to change the route of the liquid feeding system according to the purpose of use, the following effects can be achieved.

(a) Since insoluble impurities and ionic impurities can be removed in an overtank having a layer filled with ion-exchange fibers, equipment costs can be reduced and the installation space can be reduced.

(b) The layer is easy to form, and the layer does not peel or crack during water passage, and the material can be replaced while overtreating the liquid.

(c) The liquid feeding route is changed so that the overtank used to remove ionic impurities is used as a overtank to remove insoluble impurities, so the ion exchange function of the ion exchange fiber is fully utilized. It is possible to reduce the amount of ion exchange fiber used.

(d) The ion-exchange fiber layer has a large active surface area and low pressure loss during water flow, allowing for faster water flow, and compared to conventional ion-exchange resins, the excess area is smaller, making the filtration device more compact. can do.

(e) Since the material forming the layer is only ion-exchange fiber, its management becomes easy.

[Brief explanation of drawings]

FIG. 1 is a schematic system diagram showing an embodiment of the present invention in which the processing liquid of the filtration apparatus is fed in series.
FIG. 2 is a system diagram showing the opening and closing of the gate valve during material filling in FIG. 1. FIG. 3 is a system diagram showing the opening and closing of the gate valve during overtreatment in FIG. 1.
4 and 5 are system diagrams showing the opening and closing of gate valves during overtreatment and material exchange in FIG. 1.
FIG. 6 is a schematic system diagram showing an embodiment of the present invention in which the processing liquids of the filtration apparatus are fed in parallel. FIG. 7 is a system diagram showing the opening and closing of the gate valve during overtreatment in FIG. 6. 1 to 4: Over tank, 5: Tank body, 6, 6': Partition body, 7: Material filling section, 7': Layer, 8: First liquid reservoir, 9: Second liquid reservoir, 10, 19 ,28,41,
50, 67: Liquid feeding pipe, 11, 13, 15, 17,
21, 23, 25, 27, 30, 32, 34, 3
6-40, 42, 44, 46, 48, 52, 5
4, 56, 58, 68, 70, 72, 74: Gate valve.

Claims (1)

[Claims] 1 Install at least three overtanks filled with ion-exchange fibers to form layers, and
A liquid supply pipe for processing liquid and material exchange is provided, and each tank is connected to each tank via a gate valve, and one of the tanks mainly contains insoluble impurities, and the other tank mainly contains ionic impurities. A filtration device characterized in that it allows the liquid to be removed and the liquid feeding path can be changed so that one of the filtration tanks is always used for exchanging materials.