JPS60102909A - Filter apparatus - Google Patents

Abstract

PURPOSE:To perform the exchange operation of a filter material and filtering operation in parallel while reducing equipment cost and an installation area, by using a filter tank having a filter layer packed with an ion exchange fiber in the removal of ionic impurities and insoluble impurities. CONSTITUTION:When filtering treatment is performed and a filter apparatus reaches predetermined differential pressure or the liquid quality of a treated liquid reaches a predetermined value, a partition valve is operated and a filter tank, to which a liquid to be treated is supplied at first from a liquid supply pipe 10, is successively altered to make it possible to perform the exchange operation of a filter material and filtering operation in parallel. In addition, by using a filter tank having mainly performed the removal of ionic impurities as a filter tank for mainly removing insoluble impurities, the ion exchange function of a filter layer 7' can be used thoroughly and effectively.

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, a filtration tank is constructed in which a water support shelf installed in the tank is filled with granular ion exchange resin to form a P layer. , a filtration tank configured with a filtration element installed in the tank (pre-loaded with particulate ion exchange resin), or a filtration device that combines the above two types of filtration tanks is used. However, in the filtration tank of the former configuration, insoluble impurities cannot be sufficiently removed due to the particle size of the ion exchange resin, and therefore a pre-filter must be installed separately.

In addition, in a filtration tank with the latter configuration, the precoat layer often peels or cracks during water flow, and water is discharged without ionic and insoluble impurities being removed. The problem was that the ion exchange resin had to be replaced with a new particulate ion exchange resin while retaining its ion exchange function.

Furthermore, in a filtration device that combines two types of filtration tanks as described in L, since two types of filtration are used, equipment costs are high, a large space is required, and two types of ion exchange resins are required. Therefore, there were drawbacks such as complicated management.

The present invention solves the above-mentioned drawbacks of the filter tank, and
This was obtained as a result of studies aimed at providing a filtration device that can remove ionic and insoluble impurities and also allows the P material exchange operation to be performed in parallel with the filtration operation.

That is, the present invention installs at least three filtration tanks filled with ion-exchange fibers to form a P layer, and also installs liquid supply pipes for exchanging the liquid to be treated, the processing liquid, and the F material, and partitions each filtration tank. They are connected through valves, and one of the filter tanks mainly removes insoluble impurities and the other filter mainly removes ionic impurities, and one of the filter tanks is always used for replacing the p-material. The purpose of the present invention is to provide a filtration device in which the liquid feeding route can be changed as desired.

Processing liquid f of the filtration device of the present invention: 1 when sending liquid in series
A schematic system diagram of the embodiment is shown in FIG. 1, and its configuration will be explained.

Each of the filtration tanks 1 to 4 has a partition 6.6"i made of, for example, a perforated plate and a wire mesh installed in the tank body 5, and a P material filling cap 7 forming one layer approximately in the center and partitions 6.6"i on both sides thereof. It has a configuration in which a first liquid reservoir 8 and a second liquid reservoir 9 are formed.The liquid sending pipe 10 for the liquid to be treated has gate valves n, 13, 15, lr and connecting pipes 12, 14, 16, 18. It is connected to the tank body 5 so as to communicate with the first liquid storage part 8 of each of the filtration tanks 1 to 4 through the tank body 5.The liquid feeding pipe 19 for the processing liquid is connected to the connecting pipes 20, 22,
24 , 26 and gate valve 21 .

It is connected to the tank body 5 so as to communicate with the second liquid storage section 9 of each of the filtration tanks 1 to 4 via 23, 25, and 27.

The connecting pipes 12, 14, 16, and 18 for feeding the processing liquid and the connecting pipes 20, 22, 24, and 26 for feeding the processing liquid are connected through gate valves 37 to 40, respectively. The liquid sending pipe 28 for P 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 P material filling part 7 of each of the filtration tanks 1 to 4 through 34 and 36'i. The liquid sending pipe 41 for filling the p-material is connected to each filtration tank l through gate valves 42 , 44 , 46 , 48 and connecting pipes 43 , 45 , 47 , 49 .
It is connected to the tank body 5 so as to communicate with the second liquid storage section 9 of -4. The liquid sending pipe 50 for extracting the P material is a connecting pipe 51.

53 , 55 , 57 and gate valves 52 , 54 , 56
, 58, and are connected to the tank body 5 so as to communicate with the door material filling portion 7 of each of the filtration tanks 1 to 4.

Figure 2 shows the opening/closing system diagram of the gate valve during filling of F material in the above-mentioned filtration device, and Figure 3 shows the opening/closing system diagram of the gate valve during R filtering.
In the figure, P layer 7 is placed in each filtration tank 1 to 4 without filtration treatment and P material intermixing.
When forming ′.

A predetermined amount of anionic and cationic ion exchange fibers are added to a liquid such as water to create a slurry, and only the gate valves 30 and 42 are opened as shown in FIG. In this state, use the slurry pump (not shown) described above to
A partition body formed of, for example, a perforated plate and a wire mesh is supplied to the P material filling section 7 of the filtration tank 1 through the connecting pipe 29 and the gate valve 30, and depositing ion exchange fibers in the P material filling section 7. The slurry that has passed through 6' is discharged from the liquid outlet 9.

The slurry is transferred from the gate valve 42 and the connecting pipe 43 to the liquid sending pipe 41.
The F layer 7' is formed by circulating the slurry until the ion exchange fibers in the slurry are exhausted.

The formation force of the P layer 7' of the P layer 7' in the P layer 7' (once completed, the gate valve 30,
42 and the gate valves 32, . 44 Open the tank and circulate the step 1 in the same way as in the case of the double tank to form a single layer 7' in the filter tank 2. Gate valves 34 and 46 for filtration tank 3 Gate valves 36 and 48 for Kai filtration tank 4
By opening the caps and completely circulating the slurry IJ++, it is possible to form p-layers 7"if, respectively. After the formation of one layer 7' of p-tanks l to 4, liquid sending pipes 28, 41, 50
Completely close all the gate valves connected to the P layer to complete the P layer formation operation.

During the special program where the filtration process is carried out using the above-mentioned filtration device, only the gate valves 13, 27, 38, and 39 are opened as shown in Fig. Form. In this state, the liquid containing ionic and insoluble impurities is transferred to the liquid pipe 10, the gate valve 13, and the connecting pipe 1.
Sent to 4 II)? The liquid is supplied to the first liquid storage section 8 of the filtration tank 2.

The liquid supplied to the first liquid reservoir 8 passes through the partition 6 made of, for example, a wire mesh and a perforated plate, and passes through the F layer 7' formed of ion exchange fibers. Some of the impurities are removed. The filtered liquid that has passed through the partition body 6 and exited to the second liquid reservoir 9 is passed through the connecting pipe 22 and the gate valve 38.
The liquid is then supplied from the connecting pipe 16 to the first liquid reservoir 8 of the filtration tank 3 . While the liquid supplied to the first liquid reservoir 8 passes through the P layer 7', most of the insoluble impurities and ionic impurities that were not removed in the filtration tank 2 are removed. The liquid that has been filtered in the filtration tank 3 is transferred to the connecting pipe 24, the gate valve 39, and the connecting pipe 18.
The liquid is then supplied to the first liquid storage section 8 of the filtration tank 4, and the ionic impurities remaining in the F layer 7' are removed. The filtered 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 the filtration process is performed by the filtration device and the filtration device reaches a predetermined pressure difference, or the quality of the treated liquid reaches a predetermined value, as shown in FIG.
21, 39, 40i Open the bottle.

In this state, the liquid containing ionic and insoluble impurities is sent from the liquid pipe 10 to the gate valve 15 and the connecting pipe 16 and supplied to the first liquid reservoir 8 of the filtration tank 3. Most of the insoluble impurities and a part of the ionic impurities are removed from the liquid supplied to the first liquid distillation section 8 in the V layer 7', and the liquid is sequentially sent to the filter tanks 4 and 1 to remove the remaining insoluble impurities. Ionic impurities are removed. While carrying out the overflow operation of the liquid, the gate valves 32 and 54'
i Open the cap, send a liquid such as water from the liquid supply pipe 50, and connect it to the connecting pipe 53.
And it is supplied to the R material filling cap 7 of the filtration tank 2 from the gate valve 54. When the liquid is supplied to the R material filling cap 7, a P layer 7' is formed [
The ion-exchange fibers that were in the slurry are turned into a slurry and sent out through the gate valve 32 and the connecting pipe 31 from the liquid sending pipe 28 to a cleaning tank, a regeneration tank, or a receiving tank (not shown).

A slurry of recycled or new ion exchange fibers is prepared in the empty P material filling section 7, and as shown in FIG. 5, the gate valve 44 is opened and the gate valve 54 is closed. In this state, Sura IJ-tl! The F material is supplied to the F material filling section 7, and the ion exchange fibers are all deposited to form the F layer 7'. P layer 7'
When the formation of the gate valves 32 and 44i is completed, the gate valves 32 and 44i are closed.
Complete the formation operation.

When the filtration process is performed as described above and the filtration device reaches a predetermined pressure difference, or when the quality of the liquid to be treated reaches a predetermined value, the gate valve is operated to remove the liquid to be treated through the liquid supply pipe IO for the first time. By sequentially changing the filtration tank supplied to the filter, the door material conversion operation can be performed in parallel with the p-filtration operation, and the filtration tank that mainly removed ionic impurities can be used to mainly remove insoluble impurities. By using it as a filtration tank, the ion exchange function of the ion exchange fibers of the F layer 7' can be used effectively.

A schematic system diagram of another filtration device of Misfire 1, in which treated liquids are fed in parallel, is shown in FIG. 6 and will be described below.

The construction of r-filtration tanks 1 to 4 is the same as that of the filtration apparatus shown in FIG. The liquid feeding pipe 1o for the liquid to be treated has gate valves 11, 13,
15, 17 and connecting pipes 59 to 62 to each filter tank l.
~ 4 is connected to the tank body 5 so as to be connected to the first liquid reservoir 8 . It's a box. The processing liquid feeding pipe 19 has gate valves 21 , 23 ,
25 and 27 to the connecting pipes 59 to 62, and the liquid feeding pipe 67 is connected to the connecting pipes 63 to 66 and the gate valves 42 and 4.
It is connected to the tank body 5 so as to communicate with the second liquid reservoir 9 through 4, 46 and 48'i. Liquid feed pipe 2 for filter material replacement
8 and a liquid feed 50 for removing door materials are connected to the tank body 5 so as to communicate with the P material filling cap 7 via the same gate valve and connecting pipe as in the case of the filter device shown in FIG. Liquid feed pipe 4 for filling F material
1 is a gate valve 68, 7 (1.

72, 74 and connecting pipes 69, 71, 73, 75
It is connected to the tank main body so as to communicate with the first liquid storage section 8 of each of the filtration tanks 1 to 4 through.

FIG. 7 shows an opening/closing system diagram of the gate valve during the filtration operation in the second filtration device described above, and the filtration process will be explained in conjunction with FIG. 6.

The R layer 7' of the P filter tank L is formed by opening only the gate valves 30 and 68 and circulating the slurry of ion exchange fibers, and the P layer 7' of the filter tank 2 is formed by opening the gate valves 30 and 68 and circulating the slurry of ion exchange fibers. only,
The F layer 7' of the filtration tank 3 is formed by sequentially forming one layer by opening only the gate valves 34 and 72 and circulating the slurry.

Filtration processing is performed using gate valves 13, 25, 27, 44, 4
Only 6 and 48 are fully opened to form a frequently used channel for replacing the 1klF material in the filter tank. In this state, the liquid containing ionic and insoluble impurities is sent from the liquid feed pipe 1° to the gate valve 13 and the connecting pipe 60, and is supplied to the first liquid reservoir part 8 of the filtration tank 2, and the liquid containing the ionic and insoluble impurities is fed into the P layer 7'. The liquid from which most of the soluble impurities 111 and part of the ionic impurities have been removed is sent from the second liquid reservoir 9 through the gate valve 44 and the connecting pipe 64 to the liquid sending pipe 67, and then to the connecting pipes 65, 66, and The gate valves 4 ('+ and 48 are supplied to the second liquid reservoirs 9 of the filtration tanks 3 and 4, respectively. The liquid is separated from insoluble impurities and ionic substances that were not removed in the filtration tank 2 in each P layer 7'. Impurities are removed.The liquid that has been filtered in the filter tanks 3 and 4 is passed through the connecting pipes 61 and 62 and the gate valves 25 and 2.
7i and is sent from the liquid sending pipe 19 to a predetermined receiving tank (not shown).

When the filtration device reaches a predetermined pressure difference after filtration of the liquid, or when the quality of the liquid to be treated reaches a predetermined value, the seventh
The gate valves 13, 25 and 44, which were open in the figure, are closed, the gate valves 15, 21 and 42 are opened, and the liquid to be treated is passed from the liquid supply pipe 10 through the gate valve 15 and the connecting pipe 61. The liquid is supplied to the first liquid storage section 8 of the filtration tank 3. The liquid from which most of the insoluble impurities and a part of the ionic impurities have been removed in the filtration tank 3 is sent to the filtration tanks 1 and 4, respectively, where the insoluble impurities and ionic impurities that were not removed in the filtration tank 3 are removed. removed.

a gate valve 32 communicating with the filtration tank 2 during the filtration process;
54 is opened, liquid is supplied from the liquid supply pipe 50, and the ion exchange fibers forming the F layer 7' are sent out in the form of slurry at 17. When the ion-exchange fibers are sent out, the gate valve 54 is opened and the gate valve 70 is opened, and a slurry of ion-exchange fibers is supplied from the liquid supply pipe to form the P layer 7'.

The unfired scream can be implemented as a series, but is not limited to the example.

An example has been described in which four filtration tanks each having one layer filled with zero ion cross fibers are installed, but it is possible to increase the number of filtration tanks depending on the degree of impurity in the liquid to be treated, but at least Three filtration tanks are necessary: a filtration tank for material exchange, a filtration tank for mainly removing insoluble impurities, and a filtration tank for mainly removing ionic impurities.

0 The 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.

The O1 filtration tank can be implemented with a structure in which the inside of the tank is partitioned with one layer and the liquid is passed horizontally for filtration. It is also possible to use a structure in which the liquid is passed through the layer and filtered.

The present invention installs at least three filtration tanks filled with ion-exchange fibers to form a P layer as described above, and is equipped with liquid sending pipes for the liquid to be treated, the liquid to be treated, and the filtration exchange, and each filtration tank is The tanks are connected through a gate valve, and one of the filter tanks mainly removes insoluble impurities and the other filter mainly removes ionic impurities, and one of the filter tanks is always The following effects can be achieved by making it possible to change the liquid feeding system path so that it can be used for replacing the p-material.

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

(O) The P layer is easy to form, the P layer does not peel or crack during water passage, and the door material can be replaced while performing the liquid drain "A" treatment.

hj The p-filtration tank used to remove ionic impurities Since the liquid transfer path is changed to be used as a filtration tank to remove insoluble impurities, the ion-exchange function of the ion-exchange fibers is fully utilized. It is possible to reduce the amount of ion exchange fiber used.

2) One layer of ion exchange fiber 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 p filtration area is smaller, making the entire filtration device compact. It can be made l-.

(E) Since the p material forming one layer is only ion exchange fiber, its management becomes easy.

[Brief explanation of the drawing]

FIG. 1 is a schematic system diagram showing one embodiment of the process e of the filtration apparatus of the present invention, in which liquids are fed all in series. Is Fig. 2 the opening and closing of the gate valve during filling of F material in Fig. 1? FIG. FIG. 3 is a system diagram showing the opening and closing of the gate valve during the filtration process in FIG. 1. FIG. 4 and FIG. 5 are system diagrams showing the opening and closing of the gate valve during the filtration process and the sieving process in FIG. 1. FIG. 6 is a schematic system diagram showing one embodiment of the filtration apparatus of the present invention in which the processing liquids are fed in parallel. FIG. 7 is a system diagram showing the opening and closing of the gate valve during the filtration process in FIG. 6. 1-4. Filtration tank, 5: tank body, 6, 6': partition body,
72 P material filling cap, 7': P layer, 8: 1st liquid cap, 9: 2nd liquid cap, 10, 19, 28, 41, 50,
67: Liquid feeding pipe, 11 , 13 , 15 , 17 , 21
, 23 , 25 , 27 . 30, 32, 3/l, 36-40, 42,
44 , 46 , 48 , 52 , 54 .

Claims (1)

[Claims] At least three filtration tanks filled with ion-exchange fibers to form an F layer are installed, and a liquid supply pipe for exchange of the liquid to be treated, the processing liquid, and the filtration material is installed, and each filtration tank is connected to each other through a gate valve. One of the filter tanks mainly removes insoluble impurities and the other filter tank mainly removes ionic impurities, and one of the filter tanks is always used for replacing the F material. A filtration device characterized in that a liquid feeding route can be changed so as to