JPH0884989A - Hollow yarn membrane type water purifier - Google Patents

Abstract

PURPOSE: To provide a miniature hollow yarn membrane type water purifier by which purified water free from fine dust and bacteria is always supplied and backwash is enabled by utilizing purified water without necessitating a water storage tank, and reliability of purification effect is excellent. CONSTITUTION: A hollow yarn membrane type water purifier 1 is equipped with an activated carbon tank 5 and a hollow yarn membrane tank and has a constitution in which the hollow yarn membrane tanks 81 , 82 are provided in parallel in the system.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a hollow fiber membrane type water purifier equipped with a hollow fiber membrane.

[0002]

2. Description of the Related Art In recent years, interest in water has increased, and household water purifiers for purifying tap water and the like have become widespread. This household water purifier generally has a built-in activated carbon, and by adsorbing residual chlorine contained in tap water, other harmful substances, substances causing odor, etc., the activated carbon improves the taste of water. There is something. However, in such a water purifier, if water is stopped and left for a long time, residual chlorine and the like are adsorbed on the activated carbon, the sterilizing power due to this residual chlorine and the like is reduced, and the organic substance adsorbed on the activated carbon is eutrophic. A condition is formed and general bacteria propagate. When water flow is restarted in such a state, a large amount of general bacteria is found from the purified water outlet (or the purified water discharge pipe). Therefore, a hollow fiber membrane-type water purifier equipped with a hollow fiber membrane has been widely put into practical use in order to prevent general bacteria that have propagated in an activated carbon tank from flowing out from the purified water outlet.

The conventional hollow fiber membrane water purifier will be described below.
This will be described with reference to the drawings. FIG. 10 is a cross-sectional view showing a conventional hollow fiber membrane water purifier and its purification state. 1A is a conventional hollow fiber membrane water purifier, 2 is a raw water pipe for supplying raw water such as tap water, 3 is a supply pipe connected to the raw water pipe 2, 4 is a faucet arranged in the supply pipe 3, 5 Is an activated carbon tank equipped with activated carbon 6, 6 is activated carbon that removes residual chlorine, chlorine, other harmful substances and substances causing odor, etc. in the raw water, and 7 holds activated carbon 6, that is, the activated carbon 6 flows out A filter to prevent, 8A is a hollow fiber membrane tank with a hollow fiber membrane 9,
Is a hollow fiber membrane for removing fine dust and general bacteria in raw water, and 10A is a clean water discharge pipe connected to the hollow fiber membrane tank 8A. The activated carbon tank 5 is at the bottom and the hollow fiber membrane tank 8A is at the top.
The one in which the water is formed is called a water purification cartridge.

The purifying operation of the conventional hollow fiber membrane type water purifier 1A having the above-described structure will be described below. First, the faucet 4 is opened. Next, as shown by the arrow in FIG. 10, raw water is supplied from the raw water pipe 2 through the supply pipe 3 to the activated carbon tank 5 of the water purification cartridge. Next, the raw water is subjected to removal of residual chlorine, chlorine and the like in the activated carbon tank 5, then passes through the filter 7 and is supplied to the hollow fiber membrane tank 8A. Next, the raw water is supplied to the user or the like via the clean water discharge pipe 10A as shown by the arrow in FIG. 10, after fine dust and general bacteria are removed in the hollow fiber membrane tank 8A.

However, in the hollow fiber membrane type water purifier 1A, the activated carbon 6 adsorbs residual chlorine and the like, and the hollow fiber membrane 9 is used.
In addition, since fine dust and general bacteria contained in tap water are clogged (or trapped) and removed, the amount of water may decrease in a short period depending on the quality of the water source. Further, if fine dust or the like is trapped in the hollow fiber membrane 9, it is necessary to replace it, and the replacement work is cumbersome and inconvenient. Therefore, in order to extend the life of the hollow fiber membrane 9, a hollow fiber membrane type adopting a so-called backwashing technique in which water is flowed from the water outlet of the hollow fiber membrane 9 to remove fine dust and the like adhering to the hollow fiber membrane 9 A water purifier is being developed.
As a hollow fiber membrane water purifier that employs this backwashing technology, one that directly supplies tap water to the hollow fiber membrane tank 8A, or the purified water that has passed through the water purification cartridge is temporarily stored in a water storage tank. Those that supply water to 8A have been proposed.

A conventional hollow fiber membrane water purifier having a backwash function will be described below with reference to the drawings. FIG. 11 is a sectional view showing a conventional hollow fiber membrane water purifier and its purified state, and FIG. 12 is a sectional view showing a conventional hollow fiber membrane water purifier and its backwashed state. 2 is a raw water pipe, 3 is a supply pipe, 4 is a faucet, 5 is an activated carbon tank, 6 is an activated carbon, 7 is a filter, 8A is a hollow fiber membrane tank, 9 is a hollow fiber membrane, and 10A is a clean water discharge pipe. Is the same as that of the conventional hollow fiber membrane type water purifier described above, and the same reference numerals are given to omit the description. 1
A'is a conventional hollow fiber membrane water purifier, 11A is a raw water branch pipe connecting the supply pipe 3 and the purified water discharge pipe 10A, 12A is a switching valve arranged in the raw water branch pipe 11A, and 13A is a supply pipe 3. Disposed supply valve, 14A is a clean water discharge valve arranged in the clean water discharge pipe 10A, 15A is a wash water drain pipe connected to the hollow fiber membrane tank 8A of the clean water cartridge, and 16A is a wash water drain pipe 15A. It is a flush water drain valve installed.

The operation of the conventional hollow fiber membrane water purifier 1A constructed as described above will be described below. First,
The purification operation of the hollow fiber membrane water purifier 1A will be described. First, the faucet 4, the supply valve 13A and the purified water spouting valve 14A are opened, and the switching valve 12A and the flush water drain valve 16 are also provided.
A is closed. Hereinafter, in the same manner as the above-described conventional hollow fiber membrane water purifier 1A, purified water is supplied to the user or the like. Next, the backwash operation of the hollow fiber membrane water purifier 1A will be described. First, the faucet 4, the switching valve 12A and the wash water drain valve 16A are opened, and the supply valve 13A and the clean water discharge valve 14A are closed. Next, as shown by the arrow in FIG. 11, raw water is fed from the raw water pipe 2 to the supply pipe 3 and the raw water branch pipe 11
Water is supplied to the hollow fiber membrane tank 8A of the water purification cartridge through A and the water purification water discharge pipe 10A sequentially. Next, the raw water removes fine dust and general bacteria trapped in the hollow fiber membrane 9 of the hollow fiber membrane tank 8A. Next, the wash water that has washed the hollow fiber membranes 9 in the hollow fiber membrane tank 8A is drained through the wash water drain pipe 15A.

Further, another conventional hollow fiber membrane water purifier having a backwash function will be described below with reference to the drawings. FIG. 13 is a cross-sectional view showing a conventional hollow fiber membrane water purifier and its purified state, and FIG. 14 is a cross-sectional view showing a conventional hollow fiber membrane water purifier and its backwashed state. 2 is a raw water pipe, 3 is a supply pipe, 4 is a faucet, 5 is an activated carbon tank, 6 is activated carbon, 7 is a filter, 8A is a hollow fiber membrane tank, 9 is a hollow fiber membrane, 10A is a clean water discharge pipe, and 13A is a supply pipe. A valve, 14A is a clean water discharge valve, 15A is a wash water drain pipe, and 16A is a wash water drain valve. These are the same as those of the conventional hollow fiber membrane type water purifier 1A described above, and are given the same reference numerals. And the description is omitted. 1A ″ is a conventional hollow fiber membrane water purifier, 11B is a purified water branch pipe branched from the purified water discharge pipe 10A, 12B is a water storage tank connected to the purified water branch pipe 11B for temporarily storing purified water, and 13B is a water storage tank. It is a power piston for pushing out the purified water stored in 12B.

The operation of the conventional hollow fiber membrane water purifier 1A constructed as described above will be described below. First,
The purification operation of the hollow fiber membrane water purifier 1A will be described. First, the faucet 4, the supply valve 13A and the purified water discharge valve 14A are opened, and the flush water drain valve 16A is closed. Hereinafter, in the same manner as the conventional hollow fiber membrane water purifier 1A described above, purified water is supplied to the user or the like, while the purified water that has passed through the water purification cartridge is sequentially passed through the purified water discharge pipe 10A and the purified water branch pipe 11B. It is supplied and stored in the water storage tank 12B. Next, the backwash operation of the hollow fiber membrane water purifier 1A will be described. First, the flush water drain valve 16A is opened, and the faucet 4, the supply valve 13A and the purified water discharge valve 14A are closed. Next, the power piston 13B becomes "O".
Next, the purified water stored in the water storage tank 12B is supplied to the hollow fiber membrane tank 8A of the water purification cartridge through the purified water branch pipe 11B and the purified water discharge pipe 10A in order. Similar to the hollow fiber membrane water purifier 1A, after removing fine dust and general bacteria trapped in the hollow fiber membrane 9 of the hollow fiber membrane tank 8A, the wash water is drained through the wash water drain pipe 15A. To be done.

[0010]

However, in the above conventional structure, when raw water such as tap water is supplied to the outlet of the hollow fiber membrane tank for backwashing, the raw water is used for backwashing, so that the hollow fiber membrane is used. There is a problem in that fine dust and the like is trapped inside the water, and dust and the like trapped inside the hollow fiber membrane are contained in the purified water when water flow is resumed. In addition, when the purified water is once stored in a water storage tank and backwashed using it, a large amount of water for cleaning is required for backwashing, so a large water storage tank is required, which causes a problem that the device becomes large. Was.

The present invention solves the above-mentioned problems of the prior art, and can always supply purified water free of fine dust and general bacteria, and can be backwashed by using purified water without the need for a water storage tank. An object of the present invention is to provide a small-sized hollow fiber membrane type water purifier having excellent reliability such as purification effect.

[0012]

In order to achieve this object, the hollow fiber membrane type water purifier of the present invention has the following constitution. That is, the hollow fiber membrane type water purifier according to claim 1 is
A hollow fiber membrane type water purifier comprising an activated carbon tank and a hollow fiber membrane tank, wherein the hollow fiber membrane tanks are arranged in parallel in the system.

The hollow fiber membrane water purifier according to claim 2 is the same as the hollow fiber membrane water purifier according to claim 1, wherein the hollow fiber membrane water purifier has a water supply branch pipe connecting the activated carbon tank and each hollow fiber membrane tank, and a water supply branch. Connected to each water supply valve installed in each pipe, each wash water drain pipe branched from each water supply branch pipe, each wash water drain valve installed in each wash water drain pipe, and each hollow fiber membrane tank Clean water discharge pipe,
It has the composition provided with the integrated water discharge pipe which integrates each purified water discharge pipe, and the purified water discharge valve arranged in the integrated water discharge pipe.

According to a third aspect of the present invention, there is provided a hollow fiber membrane water purifier according to the first aspect, wherein the hollow fiber membrane water purifier comprises a water supply branch pipe connecting an activated carbon tank and each hollow fiber membrane tank, and a water supply branch. Connected to each water supply valve installed in each pipe, each wash water drain pipe branched from each water supply branch pipe, each wash water drain valve installed in each wash water drain pipe, and each hollow fiber membrane tank Clean water discharge pipe,
Integrate the purified water discharge valve arranged in each purified water discharge pipe, the purified water branch pipe connecting each purified water discharge pipes, the purified water branch valve arranged in each purified water branch pipe, and each purified water discharge pipe And an integrated water discharge pipe.

The hollow fiber membrane type water purifier according to claim 4 is the same as the hollow fiber membrane type water purifier according to claim 3, in which the other purified water branch pipes connecting the respective purified water discharge pipes and the other purified water branch And another purified water branch valve disposed in the pipe.

Here, the hollow fiber membrane type water purifier comprises a raw water supply pipe for connecting a raw water pipe for supplying tap water or the like to each household and an activated carbon tank, and a faucet arranged in the raw water supply pipe. May be provided. The water supply branch pipe is branched on the downstream side according to the number of hollow fiber membrane layers arranged, and the water supply valve is arranged at each branch portion of the water supply branch pipe. Instead of the water supply branch pipe, a water supply pipe that connects the activated carbon tank and each hollow fiber membrane tank may be provided, and a water supply valve may be provided in each of the water supply pipes. The integrated water discharge pipe is designed so that water can be discharged from one place for the convenience of users, but depending on the use of the user, this integrated water discharge pipe is not provided and the purified water discharge pipe is extended to the outside. You may extend and you may arrange | position each purified water discharge valve in this purified water discharge pipe. The hollow fiber membrane is a hollow fiber membrane having a hollow inside, and a hollow fiber membrane used in a water purifier having a hole diameter of 0.2 μm or less is preferably used. Water supply valve, wash water drain valve,
Examples of the purified water discharge valve and the purified water branch valve include electromagnetic valves.

[0017]

With this structure, two or more hollow fiber membrane tanks are arranged side by side in the system, so that purified water purified by at least one hollow fiber membrane tank can be supplied to another hollow fiber membrane tank. As a result, the hollow fiber membrane in the hollow fiber membrane tank can be washed with purified water without the need for a water storage tank or the like, and purified water can always be supplied to users. Furthermore, by arranging three or more hollow fiber membrane tanks in parallel in the system, the hollow fiber membrane tanks can be washed while supplying purified water to the user.

[0018]

【Example】

 (Example 1) Hereinafter, the hollow fiber in the first example of the present invention
The membrane water purifier will be described with reference to the drawings. Figure
1 is a hollow fiber membrane type water purifier according to the first embodiment of the present invention and
FIG. 2 is a sectional view showing the purification state, and FIG. 2 is a first embodiment of the present invention.
Backwash of hollow fiber membrane water purifier and one hollow fiber membrane tank in Japan
FIG. 3 is a sectional view showing a state, and FIG. 3 shows a first embodiment of the present invention.
Shows the backwash state of the hollow fiber membrane water purifier and the other hollow fiber membrane tank.
FIG. 2 is a raw water pipe, 3 is a supply pipe, 4 is a faucet,
5 is an activated carbon tank, 6 is activated carbon, 7 is a filter, 9 is a hollow fiber
Membranes, which are similar to the conventional example and have the same
The reference numerals are given and the description is omitted. 1 is a first embodiment of the present invention
Hollow fiber membrane type water purifier in 8₁ , 8₂Is the hollow fiber membrane 9,
Hollow fiber membrane tank with 9 10 is activated carbon tank 5 and each hollow fiber membrane
Tank 8₁ , 8₂ Water supply branch pipe connected to, 11₁ , 11₂ 
Is a water supply valve provided at each branch of the water supply branch pipe 10, 1
Two₁ , 12₂ Are branched from the branch portion of the water supply branch pipe 10.
Wash water drain pipe, 13₁ , 13₂ Is each wash water drain pipe 1
Two₁ , 12₂ Water drain valve disposed in₁ , 14
₂ Is each hollow fiber membrane tank 8₁ , 8₂ Purified water spout connected to each
Pipe, 15 is a clean water discharge pipe 14₁ , 14₂ To integrate
Wachi clean water discharge pipe 14 ₁ , 14₂ Each branch end is connected to
Integrated water discharge pipe, 16 is purified water disposed in the integrated water discharge pipe 15
It is a spout valve. In addition, the water supply branch pipe 10 is branched on the downstream side.
Each hollow fiber membrane tank 8₁ , 8₂ Connected to each water valve
11₁ , 11₂ Are respectively installed at the branch portions of the water supply branch pipe 10.
Have been.

Hollow fiber membrane type water purifier configured as described above
Regarding No. 1, the operation will be described below with reference to the drawings.
explain. FIG. 4 shows the mechanism of the purification state of the hollow fiber membrane 9.
Fig. 5 is a sectional view showing the mechanism of backwashing of the hollow fiber membrane.
It is sectional drawing shown. First, the purification operation of the hollow fiber membrane type water purifier 1.
Explain the work. First, the faucet 4, each water supply valve 11₁ , 11 ₂ 
And the clean water discharge valve 16 is opened, and each wash water drain valve 1
Three₁ , 13₂ Is closed. Next, raw water is raw water pipe 2
Is supplied to the activated carbon tank 5 through the supply pipe 3. next,
In the raw water, is the activated carbon tank 5 removed of residual chlorine, chlorine, etc.?
After passing through the filter 7, it passes through the filter 7, and then is viewed in the direction of arrow in FIG.
As described above, each hollow fiber membrane tank 8 is connected through the water supply branch pipe 10.₁ , 8
₂ Will be supplied with water. Next, the raw water is the hollow fiber membrane tank 8₁ , 8₂ 
Fine dust and general bacteria are removed. That is, the figure
4 Raw water is a hollow fiber membrane tank 8₁ , 8₂ in
Water is supplied from the inlet side of the empty fiber membranes 9 and 9 toward the outlet.
When it is sent out, the
Fine dust and general bacteria are trapped in the holes of the hollow fiber membranes 9, 9.
Are removed. Next, the hollow fiber membrane tank 8₁ , 8₂Clean
The purified water, as shown by the arrow in Fig. 1, is the purified water discharge pipe.
14₁ , 14₂ And the user through the integrated spout pipe 15 sequentially
Etc. In this example, both hollow fiber membrane tanks
8₁ , 8₂ I explained about the case of purifying raw water in,
One hollow fiber membrane tank 8₁ , 8₂ Raw water may be purified with.

Next, the backwashing operation of the hollow fiber membrane water purifier 1 will be described.
And explain. First, inside one of the hollow fiber membrane water purifiers 1
Empty film tank 8₁ The case of backwashing will be described. First,
Faucet 4, water supply valve 11₂ And wash water drain valve 13₁ Is "open"
And the water supply valve 11₁ , Wash water drain valve 13₂ And
The water discharge valve 16 is closed. Next, the cleaning operation described above
In the same manner as above, the raw water is fed from the raw water pipe 2 through the supply pipe 3.
After water is supplied to the activated carbon tank 5, residual chlorine and carbon
Ruki etc. are removed. Next, for raw water, filter 7
After passing, as shown by the arrow in FIG.
Hollow fiber membrane tank 8 ₂ Will be supplied with water. Next, as mentioned above,
In the same manner as the liquefying operation, the raw water is fed into the hollow fiber membrane tank 8₂ Hollow fiber
The membrane 9 removes fine dust and general bacteria. Next, the figure
2 As seen from the middle arrow, hollow fiber membrane tank 8₂ Purified water
Is the clean water discharge pipe 14₂ , Integrated water discharge pipe 15 and clean water discharge pipe
14₁ Through the other hollow fiber membrane tank 8₁ Will be supplied with water. Next
The purified water is a hollow fiber membrane tank 8₁ Trapped in the hollow fiber membrane 9 of
Removes fine dust and general bacteria. That is, FIG.
As seen in the middle arrow, the purified water is the hollow fiber membrane tank 8₁ Hollow fiber membrane
Water is supplied from the spout side of 9 and is discharged toward the water spout side.
Trapped in the hole of the hollow fiber membrane 9 indicated by the black circle in FIG.
Removes fine dust and general germs. Then in this
Empty film tank 8₁ The washing water obtained by backwashing the hollow fiber membrane 9 of
Manifold 10 and wash water drain 12₁ Be drained through.

Next, a case where the other hollow fiber membrane tank 8 ₂ of the hollow fiber membrane water purifier 1 is backwashed will be described. First, the faucet 4, the water supply valve 11 ₁ and the wash water drain valve 13 ₂ are opened, and the water supply valve 11 ₂ , the wash water drain valve 13 ₁ and the clean water discharge valve 16 are closed. Next, similarly to the above-described purification operation and backwash operation, the raw water is supplied from the raw water pipe 2 through the supply pipe 3 to the activated carbon tank 5, and then the activated carbon tank 5 is subjected to removal of residual chlorine, chlorine and the like. Be done. Next, the raw water, after passing through the filter 7, is supplied to the hollow fiber membrane tank 8 ₁ via the water supply branch pipe 10 as shown by the arrow in FIG. Next, in the same way as the above-mentioned purification operation and backwash operation, the raw water is
The hollow fiber membrane 9 in the hollow fiber membrane tank 8 ₁ removes fine dust and general bacteria. Next, as shown by the arrow in FIG. 3, the purified water purified in the hollow fiber membrane tank 8 ₁ passes through the purified water discharge pipe 14 ₁ , the integrated discharge pipe 15 and the purified water discharge pipe 14 ₂ to the other hollow fiber membrane tank 8 1. Water is supplied to ₂ . Next, in the same manner as the backwash operation described above, purified water, after removing the trapped fine dust and general bacteria in the hollow fiber membrane 9 of the hollow fiber membrane tank _82, of the hollow fiber membrane tank 8 ₂ The wash water from which the hollow fiber membrane 9 has been backwashed is drained through the water supply branch pipe 10 and the wash water drain pipe 12 ₂ .

As described above, according to this embodiment, since the two hollow fiber membrane tanks 8 are arranged in parallel in the system, the hollow fiber membrane tank 8 does not require a water storage tank. 9 can be backwashed with purified water, whereby the user can always be supplied with purified water without fine dust. In addition, the usage period (or purification period) of the hollow fiber membrane 9 can be extended.

(Embodiment 2) Hereinafter, a second embodiment of the present invention will be described.
Hollow fiber membrane type water purifier in
explain. FIG. 6 is a hollow fiber membrane according to the second embodiment of the present invention.
Type water purifier and a sectional view showing its purified state, FIG. 7 shows the present invention.
Hollow fiber membrane type water purifier and second hollow fiber in the second embodiment
Sectional drawing which shows the backwashing state of the membrane tank, FIG. 8 shows the second embodiment of the present invention.
Backwash of hollow fiber membrane water purifier and one hollow fiber membrane tank in example
FIG. 9 is a sectional view showing a state, and FIG. 9 shows a second embodiment of the present invention.
Hollow fiber membrane type water purifier and backwash state of one hollow fiber membrane tank
FIG. 3 is a cross-sectional view showing a purified state of the hollow fiber membrane tank. 2 is raw water
Pipe, 3 supply pipe, 4 faucet, 5 activated carbon tank, 6 activated
Charcoal, 7 is a filter, and 9 is a hollow fiber membrane.
It is similar to the example, and the same symbols are attached and explanations are omitted.
To do. Reference numeral 1'denotes a hollow fiber membrane type cleaner in the second embodiment of the present invention.
Water bottle, 8₁ ', 8₂ ', 8₃ ′ Is the hollow fiber membrane 9, 9, 9.
Hollow fiber membrane tank provided with 10 ', activated carbon tank 5 and each hollow fiber membrane tank
8₁ ', 8₂ ', 8₃ ′ And a water supply branch pipe connected to it, 11
₁ ', 11₂ ', 11₃ ′ Is a branch portion of the water supply branch pipe 10 ′
Water supply valves, 12₁ ', 12₂ ', 12
₃ ′ Is the washing water branched from each branch of the water supply branch pipe 10 ′.
Purified water drainage pipe, 13₁ ', 13₂ ', 13₃ ′ Is each wash water
Drainage pipe 12₁ ', 12₂ ', 12₃ Cleaning located in '
Water drain valve, 14₁ ', 14₂ ', 14₃ ′ Is each hollow fiber membrane
Tank 8₁ ', 8₂ ', 8₃ Purified water spout connected to each '
Pipe, 15 'is a clean water discharge pipe 14₁ ', 14₂ ', 14₃ ′
, That is, the clean water discharge pipe 14₁ ', 14₂ ′,
14₃ ′, An integrated water discharge pipe with branch ends connected to each, 16
₁ ', 16₂ ', 16₃ ′ Is a clean water discharge pipe 14₁ ', 14
₂ ', 14₃ ′, Each of the clean water discharge valves, 17
₁ ', 17₂ ′ Is for each clean water discharge pipe (here
Tube 14₂ 'And clean water discharge pipe 14₁ 'And the clean water discharge pipe 14
₂ 'And clean water discharge pipe 14₃ ′) Water purification branch connecting each
Tube, 17₃ ′ Is for each clean water discharge pipe (here, clean water discharge pipe
14₁ 'And clean water discharge pipe 14₃ ′) Other purified water connecting
Manifold, 18₁ ', 18₂ ′ Is each clean water branch pipe 17₁ ', 1
7₂ ′, Clean water branch valves, 18₃ ′ Is another purification
Water branch pipe 17₃ It is another clean water branch valve disposed in ′.
In addition, clean water branch pipe 17₁ ', 17₂ 'And other clean water branch pipes
17₃ ′ Is the following purified water branch pipe 17₁ ', 17₂ ', 17
₃ ’, And a water purifying branch valve 18 ₁ ', 18₂ 'as well as
Other clean water branch valve 18₃ ′ Is also the clean water branch valve 18₁ ', 1
8₂', 18₃ Shall be collectively referred to as ′.

The operation of the hollow fiber membrane water purifier 1 of the present embodiment having the above-described structure will be described below. First, the purification operation of the hollow fiber membrane water purifier 1 will be described.
First, the faucet 4, each water supply valve 11 ₁ ′, 11 ₂ ′, 11 ₃ ′
And the clean water discharge valves 16 ₁ ′, 16 ₂ ′, 16 ₃ ′ are “open”, and the clean water discharge valves 13 ₁ ′, 13
₂ ′, 13 ₃ ′ and each water purification branch valve 18 ₁ ′, 18 ₂ ′,
18 ₃ ′ is closed. Next, in the same manner as in Example 1, raw water is supplied from the raw water pipe 2 to the activated carbon tank 5 through the supply pipe 3, and residual chlorine, chlorine and the like are removed in the activated carbon tank 5. The raw water then passes through the filter 7, after which
As shown by the arrow in FIG. 6, water is supplied to each hollow fiber membrane tank 8 ₁ ′, 8 ₂ ′, 8 ₃ ′ via a water supply branch pipe 10 ′. next,
In the same manner as in Example 1, the raw water is the hollow fiber membrane tank 8 ₁ ′, 8
₂ ', 8 _3' fine dust and general bacteria are removed by.
Next, the purified water purified in the hollow fiber membrane tanks 8 ₁ ′, 8 ₂ ′, and 8 ₃ ′ is, as shown by the arrow in FIG. 6, purified water discharge pipes 14 ₁ ′,
It is supplied to the user or the like through 14 ₂ ′, 14 ₃ ′ and the integrated water discharge pipe 15 ′ in order. In this embodiment, the case where the raw water is purified by the all hollow fiber membrane tanks 8 ₁ ′, 8 ₂ ′ and 8 ₃ ′ has been described, but, for example, three hollow fiber membrane tanks 8 ₁ ′, 8 ₂ ′,
8 ₃ 'hollow fiber membrane tank ₈₁ among second of', 8 ₂ 'or purify raw water, also one hollow fiber membrane tank 8 _1' may or purifying raw water.

Next, the backwash operation of the hollow fiber membrane water purifier 1 will be described.
And explain. First, two hollows in the hollow fiber membrane water purifier 1
The backwash operation of the yarn membrane tank will be described. Here the hollow fiber
Membrane tank 8₂ ', 8₃The case of backwashing ′ will be described.
First, the faucet 4 and the water supply valve 11₁ ′, Wash water drain valve 13
₂ ', 13₃ ′ And clean water branch valve 18 ₁ ', 18₃ 'But
“Open” and water supply valve 11₂ ', 11₃ ′, Wash water
Drain valve 13₁ ′ 、 Each clean water discharge valve 16₁ ', 16₂ ', 1
6₃ ′ And clean water branch valve 18₂ ′ Is “closed”. Next
In the same way as the above-mentioned purification operation, the raw water is fed from the raw water pipe 2.
After water is supplied to the activated carbon tank 5 through the supply pipe 3, the activated carbon tank
Residual chlorine and chlorine content are removed at 5. Next, raw water
After passing through the filter 7, as shown by the arrow in FIG.
Hollow fiber membrane tank 8 via branch pipe 10 '₁ 'Is supplied with water.
Next, the raw water is
Empty film tank 8₁ With the hollow fiber membrane 9 of ′, fine dust and general bacteria
To be removed. Next, as shown by the arrow in FIG. 7, a hollow fiber membrane
Tank 8₁ The purified water purified by ′ is the purified water discharge pipe 14₁ ′, Ji
Water branch pipe 17₁ 'And the clean water discharge pipe 14 ₂ Through ’
Hollow fiber membrane tank 8₂ 'While being supplied with water, the purified water discharge pipe 14
₁ ′ 、 Purified water branch pipe 17₃ 'And the clean water discharge pipe 14₃ ′ In order
Through the hollow fiber membrane tank 8₃ 'Is supplied with water. Next, clean water
In the same manner as in Example 1, the hollow fiber membrane tank 8₂ ', 8₃ ′
Fine dust and general fine particles trapped in the hollow fiber membranes 9, 9 of
Remove the fungus. Next, this hollow fiber membrane tank 8₂ ', 8₃ 'of
The washing water used to wash the hollow fiber membranes 9 and 9 is discharged respectively from the washing water.
Water pipe 12₂ ', 12₃ Drain through ′. In addition,
In the embodiment, the clean water branch valve 18₃ When ′ is set to “open”
However, if the water pressure etc. can be controlled, the water purification branch valve 18
₃ Clean water branch valve 18 instead of '₂ ′ May be “open”
Also, all clean water branch valve 18₁ ', 18₂ ', 18₃ ′
It may be "open". Further, in this example, the hollow fiber membrane tank
8₂ ', 8₃ I explained the case of backwashing '
Empty film tank 8₂ ', 8₃ Explain the case of backwashing
But, hollow fiber membrane tank 8₁ ', 8₂ 'And hollow fiber membrane tank 8₁ ′,
8₃ The same applies to the case of backwashing ′.

Next, the backwashing operation of one hollow fiber membrane tank of the hollow fiber membrane water purifier 1'will be described. Here, the case where the hollow fiber membrane tank 8 ₃ ′ is backwashed will be described. First, the faucet 4, the water supply valves 11 ₁ ′ and 11 ₂ ′, the wash water drain valve 13
₃ ′ and the clean water branch valves 18 ₂ ′ and 18 ₃ ′ are “open”, and the water supply valve 11 ₃ ′ and the wash water drain valves 16 ₁ ′ and 16
₂ ′, each of the purified water discharge valves 16 ₁ ′, 16 ₂ ′, 16 ₃ ′ and the purified water branch valve 18 ₁ ′ are “closed”. Next, in the same manner as the above-described purification operation, raw water is supplied from the raw water pipe 2 to the activated carbon tank 5 through the supply pipe 3, and then the residual chlorine, the chlorine content and the like are removed in the activated carbon tank 5. Next, the raw water, after passing through the filter 7, as shown by the arrow in FIG.
Water is supplied to the hollow fiber membrane tanks 8 ₁ ′ and 8 ₂ ′ via the. Next, in the same manner as the above-mentioned purification operation, the raw water is subjected to removal of fine dust and general bacteria in the hollow fiber membranes 9 and 9 of the hollow fiber membrane tanks 8 ₁ ′ and 8 ₂ ′. Next, as shown by the arrow in FIG. 8, the purified water purified in the hollow fiber membrane tank 8 ₁ ′ is the purified water discharge pipe 14 ₁ ′, the purified water branch pipe 17 ₃ ′, and the purified water discharge pipe 14 ₃ ′.
The purified water, which is supplied to the hollow fiber membrane tank 8 ₃ ′ through the above and purified in the hollow fiber membrane tank 8 ₂ ′, is the purified water discharge pipe 14 ₂ ′,
Water is supplied to the hollow fiber membrane tank 8 ₃ ′ through the purified water branch pipe 17 ₂ ′ and the purified water discharge pipe 14 ₃ ′ in order. Next, in the purified water, fine dust and general bacteria trapped in the hollow fiber membrane 9 of the hollow fiber membrane tank 8 ₃ ′ are removed in the same manner as the above-mentioned backwashing operation, and then this hollow fiber membrane tank 8 3 _The washing water for washing the 3'hollow fiber membrane 9 is drained through the washing water drain pipe 12 ₃ '. In addition, in this embodiment, the case where the purified water branch valve 18 ₃ ′ is “open” has been described, but the purified water branch valve 18 ₁ ′ may be “open” instead of the purified water branch valve 18 ₃ ′, or all of them may be opened. The clean water branch valves 18 ₁ ′, 18 ₂ ′ and 18 ₃ ′ may be “open”. In addition, although the case where the hollow fiber membrane tank 8 ₃ ′ is backwashed has been described in the present embodiment, the hollow fiber membrane tank 8 ₁ ′,
The same applies to the case of backwashing 8 ₂ ′.

Next, the hollow fiber membrane tank of the hollow fiber membrane water purifier 1 '
Backwash the hollow fiber membrane 9 in one of the hollow fiber membrane tanks and
The operation of purifying in the hollow fiber membrane tank will be described. here
Is a hollow fiber membrane tank 8₂ 'Backwash and hollow fiber membrane tank 8₃ 'so
The case of purification will be described. First, tap 4, water valve
11₁ ', 11₃ ′, Wash water drain valve 13₂ ′ 、 Clean water discharge
Valve 16₃ ′ And clean water branch valve 18₁ ′ Is “open”,
Water supply valve 11₂ ′, Wash water drain valve 13₁ ', 13₃ ′,
Clean water spout valve 16₁ ', 16₂ ′ And clean water branch valve 18
₂ ', 18₃ ′ Is “closed”. Next, the purifying action described above
Raw water is fed from the raw water pipe 2 through the supply pipe 3 in the same manner as the production.
After water is supplied to the activated carbon tank 5, residual chlorine and carbon
Ruki etc. are removed. Next, for raw water, filter 7
After passing, as shown by the arrow in FIG.
And hollow fiber membrane tank 8₁ ', 8₃ 'Is supplied with water. Then,
Beam In the same way as the above-mentioned purification operation, raw water is fed into the hollow fiber membrane tank.
8₁ ', 8₃ The ‘hollow fiber membranes 9 and 9’
The fungus is removed. Next, as shown by the arrow in FIG.
Thread film tank 8₁ The purified water purified by ′ is the purified water discharge pipe 14
₁ ′ 、 Purified water branch pipe 17₁ 'And the clean water discharge pipe 14₂ ′ In order
Through the hollow fiber membrane tank 8₂ 'Is supplied with water, and is also a hollow fiber membrane tank
8₃ The purified water purified by ′ is the purified water discharge pipe 14₃ ′ 、 Integration
It is supplied to the user or the like through the water discharge pipe 15 'in sequence. Next
The hollow fiber membrane tank 8₂ The clean water supplied to the ‘
In the same manner as the backwashing operation of the hollow fiber membrane tank 8₂ ′ Hollow fiber membrane
Removed fine dust and general bacteria trapped in 9
After that, the washing water is washed water drain pipe 12₂ Drained through ′
It In the present embodiment, the hollow fiber membrane tank 8₂ Backwash and
Hollow fiber membrane tank 8₃ I explained the case of purifying with '
Hollow fiber membrane tank 8 ₂ 'Backwash and hollow fiber membrane tank 8₁ Purify with ′
When you do, again hollow fiber membrane tank 8₁ 'Backwash and hollow fiber
Membrane tank 8₂ ′ Or hollow fiber membrane tank 8₃ When purifying with '
Hollow fiber membrane tank 8₃ 'Backwash and hollow fiber membrane tank 8₁ ′ Or medium
Empty film tank 8₂ The same applies to the case of purifying with ′.

As described above, according to this embodiment, since three hollow fiber membrane tanks are arranged in parallel in the system, the hollow fiber membranes in the hollow fiber membrane tank are purified without water storage tanks. Can be backwashed with
As a result, the user can always be supplied with purified water free from fine dust and the like. In addition, the usage period (or purification period) of the hollow fiber membrane can be extended. Moreover, the hollow fiber membrane can be backwashed while supplying purified water to the user, and as a result, purified water can be constantly supplied to the user without requiring backwashing time.
Furthermore, in addition to the purified water branch pipe, other purified water branch pipes that connect the purified water discharge pipes to each other, that is, the purified water branch pipe that connects the purified water discharge pipes to each other, so that the pressure of water in each hollow fiber membrane tank decreases It is possible to supply purified water evenly. The number of hollow fiber membrane tanks is not limited to two or three, and a plurality of hollow fiber membrane tanks may be provided. As a result, the usage period (or purification period) of the hollow fiber membrane
Can be further prolonged, convenience for users and the like can be improved, and the purification effect can be further improved.

[0029]

As described above, according to the present invention, there is provided a hollow fiber membrane type water purifier comprising an activated carbon tank and a hollow fiber membrane tank, wherein the hollow fiber membrane tanks are arranged in parallel in the system. Since it is installed, it is possible to remove fine dust and general bacteria contained in raw water from which residual chlorine etc. has been removed in the activated carbon tank in multiple hollow fiber membrane tanks, so the purification effect can be enhanced and the hollow Since the life (or use period, purification period) of the fiber membrane can be extended (or extended), purified water that is always free of fine dust and general bacteria can be supplied, and a small hollow with excellent purification effect A thread film type water purifier can be realized.

Further, a water supply branch pipe connecting the activated carbon tank and each of the hollow fiber membrane tanks, a water supply valve arranged in each of the water supply branch pipes, and a wash water drainage pipe branched from the water supply branch pipe. A wash water drain valve disposed in each of the wash water drain pipes, a clean water discharge pipe connected to each of the hollow fiber membrane tanks, and an integrated discharge pipe integrating the purified water discharge pipes, Since it has a purified water discharge valve arranged in the integrated discharge pipe,
Since the purified water purified in one hollow fiber membrane tank can be supplied to the other hollow fiber membrane tank, the hollow fiber membranes in the hollow fiber membrane tank can be washed with purified water, and fine particles are left inside the hollow fiber membrane during backwashing. A small hollow fiber that does not trap dust and can always supply purified water that does not contain fine dust or general bacteria, and that does not require a water storage tank, etc. A membrane water purifier can be realized.

Further, a water supply branch pipe connecting the activated carbon tank and each of the hollow fiber membrane tanks, a water supply valve provided in each of the water supply branch pipes, and a wash water drainage pipe branched from the water supply branch pipe. A wash water drain valve provided in each wash water drain pipe, a clean water discharge pipe connected to each hollow fiber membrane tank, and a clean water discharge valve provided in each clean water discharge pipe. , A purified water branch pipe connecting each of the purified water discharge pipes, a purified water branch valve disposed in each of the purified water branch pipes, and an integrated discharge pipe that integrates the purified water discharge pipes, Since purified water purified in at least one hollow fiber membrane tank can be supplied to another hollow fiber membrane tank, the hollow fiber membrane in the hollow fiber membrane tank can be washed with purified water, and the hollow fiber membrane in the hollow fiber membrane tank Supply to the hollow fiber membrane tank that purifies by the amount of trapped minute dust etc. The amount of water and water pressure that can be controlled can be controlled, the fine dust trapped in the hollow fiber membrane can be reliably removed, and purified water that is always free of fine dust and general bacteria can be supplied, and no water storage tank is required. Therefore, it is possible to realize a small-sized hollow fiber membrane water purifier having excellent reliability such as purification effect.

Further, since the other purified water branch pipes connecting the respective purified water discharge pipes to each other and the other purified water branch valve arranged in the other purified water branch pipes are provided, one hollow fiber at the time of backwashing. When the purified water purified in the membrane tank is supplied to the other two hollow fiber membrane tanks, the purified water can be supplied uniformly without a decrease in water pressure, etc., and the purified water supplied to the hollow fiber membrane tank during backwashing. The amount of water, the water pressure, etc. can be controlled more accurately, and thus the fine dust and the like trapped in the hollow fiber membrane can be removed more reliably, and the purification effect can be further enhanced. A hollow fiber membrane type water purifier can be realized.

[Brief description of drawings]

FIG. 1 is a cross-sectional view showing a hollow fiber membrane type water purifier and a purification state thereof in a first embodiment of the present invention.

FIG. 2 is a sectional view showing a backwash state of the hollow fiber membrane type water purifier and one hollow fiber membrane tank in the first embodiment of the present invention.

FIG. 3 is a sectional view showing a backwash state of the hollow fiber membrane type water purifier and the other hollow fiber membrane tank in the first embodiment of the present invention.

FIG. 4 is a cross-sectional view showing the mechanism of the purification state of the hollow fiber membrane.

FIG. 5 is a cross-sectional view showing the mechanism of the backwash state of the hollow fiber membrane.

FIG. 6 is a cross-sectional view showing a hollow fiber membrane type water purifier and a purification state thereof in a second embodiment of the present invention.

FIG. 7 is a sectional view showing a backwash state of the hollow fiber membrane type water purifier and the second hollow fiber membrane tank in the second embodiment of the present invention.

FIG. 8 is a sectional view showing a backwash state of the hollow fiber membrane type water purifier and one hollow fiber membrane tank in the second embodiment of the present invention.

FIG. 9 is a cross-sectional view showing a hollow fiber membrane water purifier according to a second embodiment of the present invention, a backwash state of one hollow fiber membrane tank, and a purification state of one hollow fiber membrane tank.

FIG. 10 is a cross-sectional view showing a conventional hollow fiber membrane water purifier and its purified state.

FIG. 11 is a cross-sectional view showing a conventional hollow fiber membrane water purifier and its purification state.

FIG. 12 is a cross-sectional view showing a conventional hollow fiber membrane water purifier and its backwashing state.

FIG. 13 is a cross-sectional view showing a conventional hollow fiber membrane water purifier and its purified state.

FIG. 14 is a sectional view showing a conventional hollow fiber membrane water purifier and its backwashing state.

[Explanation of symbols]

1,1 ', 1A, 1A', 1A "Hollow fiber membrane type water purifier 2 Raw water pipe 3 Supply pipe 4 Water faucet 5 Activated carbon tank 6 Activated carbon 7 Filter 8 ₁ , 8 ₂ , 8 ₁ ′, 8 ₂ ′, 8 ₃ ′, 8A Hollow fiber membrane tank 9 Hollow fiber membrane 10,10 ′ Water supply branch pipe 11 ₁ , 11 ₂ , 11 ₁ ′, 11 ₂ ′, 11 ₃ ′ Water supply valve 11A Raw water branch pipe 12 ₁ , 12 ₂ , 12 ₁ ′ , 12 ₂ ′, 12 ₃ ′, 15
A Wash water drain pipe 12A Switching valve 12B Water storage tank 13 ₁ , 13 ₂ , 13 ₁ ′, 13 ₂ ′, 13 ₃ ′, 16
A Wash water drain valve 13A Supply valve 13B Power piston 14 ₁ , 14 ₂ , 14 ₁ ′, 14 ₂ ′, 14 ₃ ′, 10
A Purified water discharge pipe 15, 15 'Integrated discharge pipe 16, 16 ₁ ', 16 ₂ ', 16 ₃ ', 14A Purified water discharge valve 17 ₁ ', 17 ₂ ', 17 ₃ ', 11B Purified water branch pipe 18 ₁ ', 18 ₂ ', 18 _3' purified water branch valve

Claims (4)

[Claims] 1. A hollow fiber membrane type water purifier comprising an activated carbon tank and a hollow fiber membrane tank, wherein the hollow fiber membrane tanks are arranged in parallel in a system. Hollow fiber membrane type water purifier. 2. The hollow fiber membrane-type water purifier according to claim 1, wherein a water supply branch pipe connecting the activated carbon tank and each of the hollow fiber membrane tanks, and a water supply valve arranged in each of the water supply branch pipes. A wash water drain pipe branched from each of the water supply branch pipes, a wash water drain valve provided in each wash water drain pipe, and a clean water discharge pipe connected to each hollow fiber membrane tank. A hollow fiber membrane type water purifier comprising: an integrated water discharge pipe that integrates the respective purified water discharge pipes; and a purified water discharge valve disposed in the integrated water discharge pipe. 3. The hollow fiber membrane type water purifier according to claim 1, wherein a water supply branch pipe connecting the activated carbon tank and each of the hollow fiber membrane tanks, and a water supply valve provided in each of the water supply branch pipes. A wash water drain pipe branched from each of the water supply branch pipes, a wash water drain valve provided in each wash water drain pipe, and a clean water discharge pipe connected to each hollow fiber membrane tank. , A purified water discharge valve arranged in each of the purified water discharge pipes, a purified water branch pipe connecting each of the purified water discharge pipes, a purified water branch valve arranged in each of the purified water branch pipes, and each of the purified water A hollow fiber membrane type water purifier, comprising: an integrated water discharge pipe that integrates the water discharge pipe. 4. The hollow fiber membrane type water purifier according to claim 3, wherein another purified water branch pipe for connecting the purified water discharge pipes to each other and another purified water branch disposed in the other purified water branch pipes. A hollow fiber membrane type water purifier characterized by having a valve.