JP4500525B2 - Water purifier - Google Patents

Description

The present invention relates to a water purification apparatus, and more specifically, the entire apparatus is compact without having complicated piping, and the entire purification line can be efficiently cleaned and sterilized, and high-purity purified water is steadily used. It is related with the water purifier which can be provided in an industrial manner.

Conventionally, a reverse osmosis membrane module including a reverse osmosis membrane has been used as a component of a purification line as a device for obtaining pure water (purified water) for medical use or general daily use from raw water including city water. A water purifier (reverse osmosis membrane water purifier) is known, and is mainly used in facilities such as hospitals in order to obtain high-purity purified water for artificial dialysis, for example.

In such a water purifier, a reverse osmosis membrane module, which is a constituent element thereof, and dirt may be generated near the location of the water purification device, bacteria may be propagated, and a biofilm may be formed. Therefore, in order to obtain purified water with high purity on a regular basis, it is necessary to periodically perform maintenance such as cleaning and sterilizing the reverse osmosis membrane module and the vicinity of the location.

As a related prior art, a chemical solution / hot water tank X as shown in FIG. 8 is provided, and the chemical solution or hot water is circulated through the chemical solution / hot water supply line S and the chemical solution / hot water return line R. A reverse osmosis membrane separation device (water purification device 50) capable of washing or sterilizing the osmosis membrane module D with a chemical solution or hot water is disclosed (for example, refer to Patent Document 1) (see reference numeral 23 in FIG. 8). Is a blow valve, P ₁ , P ₂ , and P ₃ are liquid feeding pumps, and the same reference numerals are the same hereinafter.

However, as shown in FIG. 8, the reverse osmosis membrane separation device (water purification device 50) disclosed in Patent Document 1 is a chemical solution / hot water tank X, which is an activated carbon module B, a filter module C, and a purification line LP. Since the reverse osmosis membrane module D and the purified water tank E are provided with separate components, there is a problem that the piping becomes complicated and the entire apparatus becomes large. Although the reverse osmosis membrane module D can be washed or sterilized with a chemical solution or hot water, a purification line LP other than the reverse osmosis membrane module D, including a filter module C constituted by a hollow fiber filter or the like. There was a problem that the components of the above could not be cleaned or sterilized.

In particular, a filter module composed of a filter including a hollow fiber filter accumulates non-permeates such as fine particles and germs as it is used. Therefore, it is necessary to periodically clean and replace the module. However, there is a problem that a complicated operation is necessary for the replacement of the module, and further, an efficient filter module cleaning system has not been established yet.

Also, since even in the components of the cleaning lines other than the reverse osmosis membrane module, are observed breeding such occurrence or bacteria dirt operation due to Rukoto cotton for long-term device, cleaning and sterilizing the entire purification line Need to do. In particular, since purified water used for artificial dialysis is required to have a very low endotoxin content, it is highly necessary to regularly clean and sterilize the entire purification line. There is a demand for the development of a water purifier equipped with a cleaning system that can constantly provide high-purity purified water as a content rate.
JP-A-11-333266

The present invention has been made in view of such problems of the prior art. The object of the present invention is to make the entire apparatus compact without having complicated piping and to improve the efficiency of the entire purification line. It is an object of the present invention to provide a water purifier capable of regular cleaning and sterilization and capable of constantly providing purified water with high purity.

That is, according to this invention, the water purifier shown below is provided.

[1] A purification line having a raw water tank, an activated carbon module, a filter module, and a reverse osmosis membrane module, and the raw water stored in the raw water tank at a predetermined water pressure, the activated carbon module, the filter module, and it is introduced into the reverse osmosis membrane module, wherein the purification by separated into the reverse osmosis membrane first permeate module has been purified by passing through the first non-permeate which does not transmit the (purified water) A water purification apparatus capable of obtaining water, further comprising a washing line capable of washing the purification line, wherein the raw water tank has a first heating means, the washing line, The raw water is introduced from the raw water tank to the outflow end of the filter module and discharged from the inflow end. A filter module backwash line capable of backwashing, and introducing the raw water from the raw water tank to the inflow end portion side of the filter module, whereby the inflow end of the filter module that has been backwashed A filter module cleaning line capable of cleaning the part side, a first liquid feed line for introducing at least a part of the obtained purified water into the raw water tank, and the first in the raw water tank the purified water introduced by feed line of said first heating means and the raw water tank by heated state, the filter module, and successively is introduced into the reverse osmosis membrane module, the reverse osmosis a second permeate passing through the membrane module, by circulating back to the raw water tank together with a second non-permeate was not transmitted, the Water tank, said filter module, and a first circulation washing line capable of cleaning the reverse osmosis membrane module, after cleaning by the first circulation washing line, the second permeate the raw water tank And water containing the second non-permeate water is sequentially introduced into the raw water tank, the activated carbon module, the filter module, and the reverse osmosis membrane module, and returned to the raw water tank for circulation, and the activated carbon module. And the filter module and between the filter module and the reverse osmosis membrane module, respectively, and the third non-permeated water that has not permeated the reverse osmosis membrane module is discharged to the reverse osmosis membrane. By discharging from the module to the outside, the raw water tank, the activated carbon module, the fill And a second circulation washing line capable of washing the reverse osmosis membrane module (hereinafter, also referred to as “first water purification device”).

[ 2 ] A purification line having a raw water tank, an activated carbon module, a filter module, and a reverse osmosis membrane module, and the raw water stored in the raw water tank at a predetermined water pressure, the activated carbon module, the filter module, And the purification by introducing into the reverse osmosis membrane module and separating the first permeated water (purified water) purified by permeating through the reverse osmosis membrane module and the non-permeated first non-permeated water. A water purification apparatus capable of obtaining water, further comprising a washing line capable of washing the purification line, wherein the raw water tank has a first heating means, the washing line, The raw water is introduced from the raw water tank to the outflow end of the filter module and discharged from the inflow end. The filter module backwash line capable of backwashing the filter module, and the inflow of the filter module backwashed by introducing the raw water from the raw water tank to the inflow end portion side of the filter module. A filter module cleaning line capable of cleaning the end side, a second liquid feed line for introducing activated carbon module permeated water that has permeated the activated carbon module into the raw water tank, and the second in the raw water tank was introduced by the feed line the activated carbon module permeated water, the first heating means and the raw water tank by heated state, the filter module, and successively is introduced into the reverse osmosis membrane module, wherein The third permeated water that has passed through the reverse osmosis membrane module and the fourth non-permeated water that has not permeated are returned to the raw water tank together. And a third water purification line (hereinafter referred to as “second water purification”) that is capable of washing the raw water tank, the filter module, and the reverse osmosis membrane module by circulating the water. Sometimes referred to as a device).

[ 3 ] After the cleaning by the third circulating cleaning line, the cleaning line uses the raw water tank, the activated carbon module, and the water containing the third permeated water and the fourth non- permeated water in the raw water tank. , Sequentially introduced into the filter module and the reverse osmosis membrane module and circulated back to the raw water tank, and between the activated carbon module and the filter module, and between the filter module and the reverse osmosis membrane module. together it is discharged to the outside respectively from between, the reverse osmosis membrane by a fifth non-permeate not permeated be discharged to the reverse osmosis membrane module or al outer portion of the module, the raw water tank, the activated carbon module, wherein A fourth circulation washing line capable of washing the filter module and the reverse osmosis membrane module; Water purification device according to further comprising comprising said [2].

[ 4 ] The purification line further includes a purified water tank having a second heating means capable of storing the obtained purified water, and the cleaning line is stored in the purified water tank. And a fifth circulating cleaning line capable of cleaning the purified water tank by circulating the purified water in the purified water tank while being heated by the second heating means. The water purifier according to any one of [1] to [ 3 ].

[ 5 ] The water purifier according to any one of [1] to [ 4 ], wherein the filter constituting the filter module is at least one selected from the group consisting of a hollow fiber filter, a ceramic filter, and a spiral filter.

The first water purification apparatus of the present invention further comprises a washing line capable of washing the purification line, and the raw water tank has a first heating means, and this washing line backwashes the filter module. A filter module backwash line capable of cleaning, a filter module cleaning line capable of cleaning the inflow end portion of the backwashed filter module, and at least a part of the obtained purified water, a first feed line for introducing into the purified water in the raw water tank, raw water tank heated state in the first heating means, the filter module, and successively is introduced into the reverse osmosis membrane module, wherein a second permeate passing through the reverse osmosis membrane module, these by together a second non-permeate was not transmitted to circulate back to the raw water tank cleaning Since the entire system is compact without complicated piping, efficient cleaning and sterilization of the entire purification line is possible. In addition, there is an effect that high-purity purified water can be constantly provided.

The second water purification apparatus of the present invention further includes a washing line capable of washing the purification line, and the raw water tank has a first heating means, and this washing line includes the filter module. A filter module backwashing line capable of backwashing, a filter module washing line capable of washing the inflow end side of the filter module, and a second liquid feeding line for introducing the activated carbon module permeate into the raw water tank When the activated carbon module permeated water of the raw water in the tank, the raw water tank heated state in the first heating means, sequentially is introduced into the filter module, and a reverse osmosis membrane module, transmitted through the reverse osmosis membrane module first It is washed and by circulating back third and permeate, the fourth raw water tank together with non-permeate which has not passed through The system is compact without the need for complicated piping, and the entire purification line can be efficiently cleaned and sterilized. In addition, there is an effect that high-purity purified water can be constantly provided.

Hereinafter, embodiments of the present invention will be described. However, the present invention is not limited to the following embodiments, and may be appropriately selected based on ordinary knowledge of those skilled in the art without departing from the spirit of the present invention. It should be understood that design changes, improvements, etc. may be made. Henceforth, when only calling it "the water purifier of this invention", it is the meaning including both a 1st water purifier and a 2nd water purifier.

FIG. 1 is a schematic view showing an embodiment of the first water purifier of the present invention, and FIG. 3 is a flow diagram showing a water purification process in the water purifier of the present invention. As shown in FIG. 1, the water purification apparatus 1 of this embodiment is a purification line LP (solid line portion in FIG. 1) having a raw water tank A, an activated carbon module B, a filter module C, and a reverse osmosis membrane module D. It has. When purifying the raw water, as shown in FIG. 3, first, the raw water stored in the raw water tank A is sequentially introduced into the activated carbon module B, the filter module C, and the reverse osmosis membrane module D at a predetermined water pressure. The purified water can be obtained by separating the purified water that has been permeated through the reverse osmosis membrane module D and the first non-permeated water that does not permeate. The 1st non-permeate water which did not permeate | transmit the reverse osmosis membrane module D is discharged | emitted outside the purified water line LP. In addition, as the raw water, city water (tap water), ground water, industrial water, mixed water thereof, or desalted water obtained by desalting these can be used.

In addition to the purification line LP described above, the water purification apparatus 1 of the embodiment shown in FIG. 1 includes a cleaning line LW (dashed line portion in FIG. 1) that can clean the purification line LP. The cleaning line LW includes a filter module backwash line LF ₁ (see FIG. 4A) for cleaning the filter module C, a filter module cleaning line LF ₂ (see FIG. 4B), and a purification line LP. And a first circulating cleaning line LC ₁ (see FIG. 5B) for cleaning and sterilizing the whole with warm water, and a first liquid feeding line LS ₁ (see FIG. 5A). . Hereinafter, each line constituting the cleaning line LW will be described with reference to the drawings. In addition, the purification line and the washing line in the present invention do not indicate only the pipes connecting the tanks and the modules, but are concepts including these tanks and the modules.

As shown in FIG. 4 (a), of the cleaning line LW constituting the water purification apparatus 1 of the present embodiment (see FIG. 1), the filter module backwash line LF ₁ is flowing out from the raw water tank A filter module C The filter module C is a line that can be backwashed by introducing raw water into the end 6 side and discharging it as washing waste water from the inflow end 5 side. Further, as shown in FIG. 4 (b), of the cleaning line LW constituting the water purification apparatus 1 of the present embodiment (see FIG. 1), the filter module cleaning line LF ₂ are flowing from the raw water tank A filter module By introducing raw water into the end 5 side, the inflow end 5 side of the filter module C that has been backwashed by the filter module backwash line LF ₁ described above can be washed. Here, “cleaning the inflow end portion side of the filter module” means cleaning and removing the non-permeate separated on the capturing surface (inflow end portion 5) side of the filter constituting the filter module C by backwashing. This means that only the trapping surface (inflow end portion 5) side of the filter is washed without substantially transmitting raw water to the outflow end portion 6 side.

Usually, in the water purifier used in facilities such as hospitals to obtain purified water for artificial dialysis, city water (tap water) containing chlorine at an appropriate concentration (about 0.2 to 0.8 ppm) is used. Often used as raw water. In this case, as shown in FIG. 4 (a), FIG. 4 (b), in water purification apparatus of this embodiment, the filter module backwash line LF ₁ during cleaning of the filter module C, and the filter cleaning line LF _2, activated carbon Since the raw water containing the above-mentioned appropriate concentration of chlorine can be directly introduced into the filter module C without going through the module B, the non-permeate accumulated in the filter module C can only be removed. In addition, chlorination treatment with chlorine contained in the raw water can be performed at the same time.

After the cleaning of the filter module C by the filter module cleaning line LF ₂ (see FIG. 4B) is completed, the activated carbon module is interposed between the raw water tank A and the filter module C as shown in FIG. A proper amount of raw water containing chlorine remaining in the filter module C is discharged from the blow valve 22 as blow drainage, and then normal purification as shown in FIG. 3 is performed.

As shown to Fig.5 (a), among the washing lines LW (refer FIG. 1) which comprises the water purifier 1 of this embodiment, the 1st liquid feeding line LS1 is at least ₁ of the obtained purified water. It is a line that can introduce the section into the raw water tank A.

Moreover, as shown in FIG.5 (b), the 1st circulation washing line LC1 of the washing | cleaning line LW (refer FIG. 1) which comprises the water purifier 1 of this embodiment is the _1st in the raw | natural water tank A. purified water introduced from one feed line LS _1, raw water tank a, the filter module C, and successively is introduced into the reverse osmosis membrane module D, a second permeate passing through the reverse osmosis membrane module D This is a line that can clean the raw water tank A, the filter module C, and the reverse osmosis membrane module D by returning the non-permeated second non-permeate water to the raw water tank A and circulating it. . Here, in the water purifier of the present embodiment, the first heating means (heater 11) is disposed in the raw water tank A, and is introduced from the _first liquid feed line LS1 in the raw water tank A. a first circulation washing line LC ₁ can be circulated in a state of purified water warmed were. Therefore, since the raw water tank A, the filter module C, and the reverse osmosis membrane module D constituting the purification line can be washed while being sterilized with hot water, for example, a low endotoxin content rate required for purified water for artificial dialysis is obtained. High purity purified water can be provided constantly.

Further, as shown in FIG. 5 (b), in water purification apparatus of this embodiment, the first circulation washing line LC ₁ is because it is composed without passing through the activated carbon module B, for example, the raw water tank A If a drug solution such as peracetic acid is prepared so that the concentration is appropriate (about 50 to 100 ppm), this drug solution is directly introduced from the raw water tank A into the filter module C and the reverse osmosis membrane module D. Is possible. Therefore, the water purifier of this embodiment can also perform the chemical cleaning process of the filter module C and the reverse osmosis membrane module D constituting the purification line.

As shown in FIG. 5 (b), the second non-permeated water that has not permeated the reverse osmosis membrane module D passes through the non-permeate water line Q, and the second permeated water that has permeated the reverse osmosis membrane module D is What is necessary is just to liquid-feed to the raw | natural water tank A through the permeate line P, respectively. That is, in FIG.5 (b), the non-permeate water line Q and the permeate water line P each comprise a part of _1st circulation washing line LC1.

Further, as shown in FIG. 5 (c), water purification apparatus of this embodiment, the cleaning line LW (see FIG. 1), the first circulation washing line LC 1 after washing with _(see FIG. 5 (b)) The water containing the second permeated water and the second non- permeated water in the raw water tank A is sequentially introduced into the raw water tank A, the activated carbon module B, the filter module C, and the reverse osmosis membrane module D and the raw water tank A The raw water tank A, the activated carbon module B , the filter module C , and the reverse osmosis membrane module D can be washed by circulating back to the water and discharging the third non- permeated water from the reverse osmosis membrane module D to the outside. preferably further comprising a second circulating cleaning line LC ₂ possible. Since the cleaning line LW (see FIG. 1) includes the second circulation cleaning line LC ₂ as described above, the cleaning in the line can be performed, and the temperature in the line that has risen due to the use of hot water is usually reduced. It can be returned to the state.

Next, an embodiment of the second water purifier of the present invention will be described. Drawing 2 is a mimetic diagram showing one embodiment of the 2nd water purifier of the present invention. The water purifier 2 of this embodiment includes a purification line LP (solid line portion in FIG. 2) having a raw water tank A, an activated carbon module B, a filter module C, and a reverse osmosis membrane module D. In addition, the method of purifying raw water and obtaining purified water is the same as the case of the 1st water purifier already demonstrated (refer FIG. 3), and the kind of raw | natural water used is the same as that of the case of a 1st water purifier. is there.

The water purification apparatus 2 of the embodiment shown in FIG. 2 includes a cleaning line LW (dashed line portion in FIG. 2) that can clean the purification line LP in addition to the purification line LP. The cleaning line LW includes a filter module backwash line LF ₁ (see FIG. 4A) for cleaning the filter module C, a filter module cleaning line LF ₂ (see FIG. 4B), and a purification line LP. Is constructed by a third circulating cleaning line LC ₃ (see FIG. 6B) and a second liquid feeding line LS ₂ (see FIG. 6A). . In addition, about the filter module backwash line for washing | cleaning the filter module C, and the filter module washing | cleaning line, it is the same as that of the case of the 1st water purifier already demonstrated. Hereinafter, the third circulating cleaning line and the second liquid feeding line among the lines constituting the cleaning line LW will be described with reference to the drawings.

As shown in FIG. 6 (a), of the cleaning line LW constituting the water purification apparatus 2 of the present embodiment (see FIG. 2), a second feed line LS ₂ is activated carbon module which has passed through the activated carbon module B This is a line through which permeated water can be introduced into the raw water tank A. Further, as shown in FIG. 6 (b), the third circulation washing line LC ₃ is in the raw water tank A, the second liquid delivery activated carbon module permeated water introduced from the line LS _2, raw water tank A, The filter module C and the reverse osmosis membrane module D are sequentially introduced into the raw water tank A together with the third permeated water that has permeated the reverse osmosis membrane module D and the fourth non-permeated water that has not permeated. By returning and circulating, the raw water tank A, the filter module C, and the reverse osmosis membrane module D can be washed. Here, in the water purifier of the present embodiment, the first warming means (heater 11) is disposed in the raw water tank A, and is introduced from the _second liquid feeding line LS2 in the raw water tank A. The activated carbon module permeated water can be circulated in the third circulating cleaning line LC ₃ in a heated state. Therefore, since the raw water tank A, the filter module C, and the reverse osmosis membrane module D constituting the purification line can be washed while being sterilized with hot water, for example, a low endotoxin content rate required for purified water for artificial dialysis is obtained. High purity purified water can be provided constantly.

Further, as shown in FIG. 6 (b), in water purification apparatus of this embodiment, the third circulating cleaning line LC _3, because it is composed without passing through the activated carbon module B, for example, the raw water tank A If a drug solution such as peracetic acid is prepared so that the concentration is appropriate (about 50 to 100 ppm), this drug solution is directly introduced from the raw water tank A into the filter module C and the reverse osmosis membrane module D. Is possible. Therefore, the water purifier of this embodiment can also perform the chemical cleaning process of the filter module C and the reverse osmosis membrane module D constituting the purification line. As shown in FIG. 6 (b), the fourth non-permeated water that has not permeated the reverse osmosis membrane module D passes through the non-permeate water line Q, and the third permeated water that has permeated the reverse osmosis membrane module D is What is necessary is just to liquid-feed to the raw | natural water tank A through the permeate line P, respectively.

Further, as shown in FIG. 6 (c), water purification apparatus of this embodiment, the cleaning line LW (see FIG. 2), the third circulation washing line LC 3 after washing with _(FIG. 6 (b) see) The water containing the third permeated water and the fourth non- permeated water in the raw water tank A are sequentially introduced into the raw water tank A, the activated carbon module B, the filter module C, and the reverse osmosis membrane module D and the raw water tank A The raw water tank A, the activated carbon module B , the filter module C 1 , and the reverse osmosis membrane module D can be washed by circulating back to the reverse and discharging the fifth non- permeated water from the reverse osmosis membrane module D to the outside. preferably further comprising a fourth circulation washing line LC ₄ of possible. Since the cleaning line LW (see FIG. 2) includes the fourth circulation cleaning line LC ₄ as described above, the cleaning in the line can be performed, and the temperature in the line that has risen due to the use of hot water is usually reduced. It can be returned to the state.

Drawing 7 (a) and Drawing 7 (b) are mimetic diagrams showing other embodiments of the 1st water purifier of the present invention. In the present invention, as shown in FIGS. 7 (a) and 7 (b), the purification line LP has a second heating means (heater 12) capable of storing the obtained purified water. The purified water tank E is further cleaned, and the cleaning line LW cleans the purified water tank E by circulating the purified water stored in the purified water tank E in the purified water tank E while being heated by the heater 12. It is preferable to further include a fifth circulating cleaning line LC ₅ that can be used. Since the cleaning line LW includes the fifth circulation cleaning line LC ₅ having such a configuration, the purified water tank E for storing the purified water can be cleaned while being sterilized with hot water. It is possible to constantly provide high-purity purified water having a low endotoxin content required for purified water.

Here, in the present invention, the heating means disposed in each of the raw water tank and the purified water tank is capable of heating water in each tank up to about 80 ° C. More specifically, an electric heater or a mechanism (apparatus) for supplying steam or hot water can be used. Moreover, when performing the hot water sterilization by the 1st-5th circulating washing line, what is necessary is just to circulate each the water heated at 60-80 degreeC.

It is preferable that the tank, piping, etc. constituting the water purifier of the present invention are made of a material having appropriate corrosion resistance, pressure resistance, hot water resistance, heat resistance, and the like. Examples of the material having such characteristics include metals such as stainless steel and titanium, and plastics such as vinyl chloride, polypropylene, and polyvinylidene fluoride. Moreover, the reverse osmosis membrane which comprises a reverse osmosis membrane module should just be able to endure the sterilization washing | cleaning by the raw water etc. which contain the warm water mentioned above, or chlorine. Specific examples include polyamide reverse osmosis membranes, composite membranes, and reverse osmosis membranes made of cellulose acetate.

In the water purifier of the present invention, the efficiency of the fine particle component contained in the raw water is that the filter constituting the filter module is at least one selected from the group consisting of a hollow fiber filter, a ceramic filter, and a spiral filter. This is preferable because it can be removed in an effective manner. In addition, as a hollow fiber filter, you may use a whole quantity permeation | transmission type hollow fiber filter, However, It is not limited to this, Various hollow fiber filters can be used.

In the water purification apparatus of the present invention, during normal time (when using the water purification line), purified water is obtained by purifying the purified water line, and the purified water is stored in a purified water tank or the like as needed. To the outside. When cleaning (when the water purification line is not used), the cleaning line is cleaned by the cleaning line. The process of cleaning the purification line by the cleaning line can be roughly divided into two cleaning processes as described above. That is, the first cleaning process is “filter module backwashing line and filter module backwashing / washing by filter module cleaning line” as shown in FIGS. 4A to 4C. 5 (a) to 5 (c), “the raw water tank A, the filter module C, and the reverse of the first liquid feeding line LS ₁ and the first circulating washing line LC ₁ as shown in FIG. osmosis membrane cleaning module D ", or FIG. 6 (a) ~ 6 as shown in (c)," the second feed line LS _2, and the third raw water tank a by circulating cleaning line LC ₃ of the filter module C and cleaning of reverse osmosis membrane module D ".

The cleaning of the purification line in the first cleaning process is to backwash and clean the filter module that is more frequently clogged than other modules, so it depends on the processing capacity of the filter module. However, it may be carried out, for example, 1 to 4 times a day. On the other hand, the cleaning of the purification line by the second cleaning process is for cleaning the entire purification line, and does not need to be performed with a cycle as short as the cleaning by the first cleaning process. For example, when the water purifier of the present invention is used to obtain purified water used for artificial dialysis, the endotoxin content rate of purified water is regularly inspected and measured, and the measured value is a predetermined reference value. When it exceeds it, what is necessary is just to implement the washing | cleaning by a 2nd washing | cleaning process, and depending on the processing capacity of a water purifier, etc., it should just carry out once or twice for 2 weeks.

The liquid supply to each line can be switched by opening and closing a valve disposed in a pipe connecting each tank and module, although not particularly shown. The opening and closing of the valve may be performed manually, but the valve may be an automatic valve and may be performed by providing a system that automatically opens and closes in a predetermined cycle in conjunction with a timer. Thus, according to the water purifier of the present invention, high-purity purified water can be steadily provided by cleaning the purification line at a predetermined cycle.

The water purification apparatus of the present invention is compact as a whole without having complicated piping, and can efficiently clean and sterilize the entire purification line, and can constantly provide high-purity purified water. Therefore, for example, in order to obtain high-purity purified water for artificial dialysis, it is preferably used mainly in facilities such as hospitals.

It is a schematic diagram which shows one Embodiment of the 1st water purifier of this invention. It is a schematic diagram which shows one Embodiment of the 2nd water purifier of this invention. It is a flowchart which shows the water purification process in the water purifier of this invention. Fig.4 (a)-FIG.4 (c) are flowcharts which show the process in which the filter module in the water purifier of this invention is wash | cleaned. Fig.5 (a)-FIG.5 (c) are flowcharts which show the process in which the purification line in the 1st water purifier of this invention is wash | cleaned with warm water. Fig.6 (a)-FIG.6 (c) are flowcharts which show the process in which the purification line in the 2nd water purifier of this invention is wash | cleaned with warm water. Drawing 7 (a) and Drawing 7 (b) are mimetic diagrams showing other embodiments of the 1st water purifier of the present invention. It is a schematic diagram which shows one Embodiment of the conventional water purifier.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1, 2, 50 ... Water purifier, 5 ... Inflow end part, 6 ... Outflow end part, 11, 12 ... Heater 21, 22, 23 ... Blow valve, A ... Raw water tank, B ... Activated carbon module, C ... Filter module , D ... reverse osmosis membrane module, E ... purified water tank, X ... chemical / hot water tank, LP ... clean lines, LW ... cleaning line, LF ₁ ... filter module backwash line, LF ₂ ... filter module cleaning line, LC ₁ ... 1st circulation washing line, LC ₂ ... 2nd circulation washing line, LC ₃ ... 3rd circulation washing line, LC ₄ ... 4th circulation washing line, LC ₅ ... 5th circulation washing line, LS ₁ ... first feed line, LS ₂ ... second feed _{line, P 1, P 2, P} 3, P 4 ... feeding pump, P ... permeate line, Q ... nontransparent water line, R ... Chemical solution / hot water return line, S ... Chemical solution / hot water supply line .

Claims (5)

A purification line having a raw water tank, an activated carbon module, a filter module, and a reverse osmosis membrane module is provided, and the activated water stored in the raw water tank is converted into the activated carbon module, the filter module, and the reverse at a predetermined water pressure. The purified water is obtained by introducing it into the osmotic membrane module and separating it into a first permeated water (purified water) purified by permeating through the reverse osmosis membrane module and a non-permeated first non-permeated water. A water purifier capable of
Further comprising a cleaning line capable of cleaning the purification line, the raw water tank has a first heating means,
A filter module backwash line in which the washing line can backwash the filter module by introducing the raw water from the raw water tank to the outflow end portion side of the filter module and discharging the raw water from the inflow end portion side. When,
A filter module cleaning line capable of cleaning the inflow end portion of the filter module that has been backwashed by introducing the raw water from the raw water tank to the inflow end portion of the filter module;
A first liquid feed line for introducing at least part of the obtained purified water into the raw water tank;
Inside the raw water tank, the filter module, and the reverse osmosis membrane module in a state where the purified water introduced by the first liquid feeding line in the raw water tank is heated by the first heating means. sequentially is introduced, said a second permeate passing through the reverse osmosis membrane module, by circulating back to the raw water tank together with a second non-permeate was not transmitted, the raw water tank, A first circulation washing line capable of washing the filter module and the reverse osmosis membrane module ;
After washing by the first circulating washing line, the water containing the second permeated water and the second non-permeated water in the raw water tank is converted into the raw water tank, the activated carbon module, the filter module, and the reverse Introduce into the osmosis membrane module sequentially and return to the raw water tank to circulate, and discharge to the outside from between the activated carbon module and the filter module and between the filter module and the reverse osmosis membrane module. The raw water tank, the activated carbon module, the filter module, and the reverse osmosis membrane module by discharging the third non-permeated water that has not permeated the reverse osmosis membrane module to the outside from the reverse osmosis membrane module. A water purifier having a second circulating washing line capable of washing . A purification line having a raw water tank, an activated carbon module, a filter module, and a reverse osmosis membrane module is provided, and the activated water stored in the raw water tank is converted into the activated carbon module, the filter module, and the reverse at a predetermined water pressure. The purified water is obtained by introducing it into the osmotic membrane module and separating it into a first permeated water (purified water) purified by permeating through the reverse osmosis membrane module and a non-permeated first non-permeated water. A water purifier capable of
Further comprising a cleaning line capable of cleaning the purification line, the raw water tank has a first heating means,
A filter module backwash line in which the washing line can backwash the filter module by introducing the raw water from the raw water tank to the outflow end portion side of the filter module and discharging the raw water from the inflow end portion side. When,
A filter module cleaning line capable of cleaning the inflow end portion of the filter module that has been backwashed by introducing the raw water from the raw water tank to the inflow end portion of the filter module;
A second liquid feed line for introducing the activated carbon module permeated water that has passed through the activated carbon module into the raw water tank;
The raw water tank, the filter module, and the reverse osmosis membrane in a state where the activated carbon module permeated water introduced by the second liquid feeding line in the raw water tank is heated by the first heating means. with successively introduced into the module, and the third permeate that has passed through the reverse osmosis membrane module, by circulating back to the raw water tank along a fourth and a non-permeate which has not passed through the raw water A water purifier comprising a tank, the filter module, and a third circulation washing line capable of washing the reverse osmosis membrane module. After the cleaning by the third circulating cleaning line, the cleaning line is configured to supply water containing the third permeated water and the fourth non- permeated water in the raw water tank to the raw water tank, the activated carbon module, and the filter. Module and the reverse osmosis membrane module sequentially introduced and returned to the raw water tank for circulation, and between the activated carbon module and the filter module, and between the filter module and the reverse osmosis membrane module, respectively. together is discharged to the outside, the reverse osmosis membrane by a fifth non-permeate not permeated be discharged to the reverse osmosis membrane module or al outer portion of the module, the raw water tank, the activated carbon module, the filter module, And a fourth circulating cleaning line capable of cleaning the reverse osmosis membrane module Water purification device according to claim 2 which is formed by. The purification line further includes a purified water tank having a second heating means capable of storing the obtained purified water, and the purification line stored in the purified water tank. 5. A fifth circulation washing line capable of washing the purified water tank by circulating water in the purified water tank while being heated by the second heating means. The water purifier as described in any one of claim | item 1 -3 . The water purifier according to any one of claims 1 to 4 , wherein the filter constituting the filter module is at least one selected from the group consisting of a hollow fiber filter, a ceramic filter, and a spiral filter.

Images