JPH0747358A - Water purifying device - Google Patents

Abstract

PURPOSE:To adsorb and remove org. chlorine compds. such as trihalomethanes and to increase the period of exchanging cycle of a water purifier having an adsorbing zone with active carbon in the path for water processing, by using a heat-resistant material against heat for parts to be in contact with water. CONSTITUTION:In the water purifier, an adsorbing zone A with active carbon 6 is disposed in the path for water processing from the entrance 1 of raw water to the exit 2 of purified water. The surfaces to be in contact with water are made of a heat-resistant material which endures against heat at >=80 deg.C. As a result, by only supplying hot water which is a very easy and simple operation, not only the performance to adsorb and remove org. chlorine compds. but the performance to adsorb and remove free chlorine and org. and odorous components in the adsorbing zone A can be recovered. Moreover, no damage due to heat is caused on members which constitute the path for water processing and hold the active carbon 6, so that reduction of durability can be prevented although the performance to adsorb and remove is recovered with hot water. Thus, excellent performance concerning durability can also be obtd.

Description

Detailed Description of the Invention

[0001]

FIELD OF THE INVENTION The present invention is directly connected to a faucet, or
A water purifier that is connected and used via a flow path switcher,
More specifically, the present invention relates to a device provided with an adsorption treatment section using activated carbon so as to remove free chlorine in raw water.

[0002]

2. Description of the Related Art Water purifiers of this type have
There are two types, one that has only an adsorption treatment part with activated carbon and one that has a filtration treatment part with an adsorption treatment part and a membrane such as a hollow fiber membrane. From the aspect, the treatment part is fixedly installed on the main body. There are two types: a total exchange type in which the whole is exchanged, and a cartridge exchange type in which the processing unit is configured as a cartridge that is detachable from the main body and only the processing unit is exchanged. The conventional water purifier of this type removes free chlorine in the raw water by passing the raw water through the adsorption treatment section.

[0003]

By the way, in the above-mentioned faucet connection type water purifier, the SV value is generally 1000 or more. On the other hand, today, the generation of organochlorine compounds represented by trihalomethanes such as chloroform, dichlorobrolomethane, and chlorodibrolomethane due to pollution of water sources has become a serious social problem. Then, in the conventional water purifier, when water is purified under the condition that the SV value is 1000 or more, the SV value is too large, and the adsorption / removal capacity for organic chlorine compounds becomes about 1/5 of the adsorption / removal capacity for free chlorine.

Therefore, when the above-mentioned conventional water purifier is used for the adsorption removal of the organic chlorine compound, the service life of the adsorption treatment section by activated carbon and the amount of treated water are ⅕ of those when it is used only for the adsorption removal of free chlorine. It will be about. Therefore, if you want to remove organochlorine compounds such as trihalomethanes, the all-replacement type leads to a significantly shortened replacement cycle of the water purifier, and the cartridge-replacement type leads to a significantly shortened replacement cycle of the cartridge. Increase the financial burden on the user.

An object of the present invention is to prolong the exchange cycle while adsorbing and removing an organic chlorine compound represented by trihalomethane.

[0006]

A first invention of the present invention is a water purifier in which an adsorption treatment section using activated carbon is arranged in a water treatment passage extending from a raw water inlet to a purified water outlet.
The water contact surface is made of a heat resistant material that can withstand heat of 80 ° C. or higher.

A second aspect of the present invention is a water purifier in which an adsorption treatment section using activated carbon and a filtration treatment section using a membrane are arranged in a water treatment passage extending from a raw water inlet to a purified water outlet. As the treatment flow passage, a passage that can be switched between a first water passage state in which water is passed through the adsorption treatment portion and the filtration treatment portion and a second water passage state in which water is passed only through the adsorption treatment portion is provided, and the second water passage state is provided. In the above, the water contact surface in contact with water is made of a heat resistant material that can withstand heat of 80 ° C. or higher.

A third aspect of the present invention is a water purifier in which an adsorption treatment section using activated carbon arranged in a water treatment passage extending from a raw water inlet to a purified water outlet is configured as a detachable cartridge. The point that the water contact member for holding the activated carbon in the adsorption treatment section is made of a heat resistant material that can withstand heat of 80 ° C. or higher.

[0009]

By immersing the adsorption treatment section using activated carbon in hot water at 80 ° C. or higher, preferably 90 ° C. or higher, or by passing the hot water through the adsorption treatment section, free chlorine adsorbed on the activated carbon as well as trihalomethane is adsorbed. The activated carbon can be regenerated by desorbing organic chlorine compounds such as
It is known that the adsorptive removal capability for free chlorine and organic chlorine compounds in the adsorption treatment section can be restored.

According to the first aspect of the invention, since the water contact surface is made of a heat-resistant material, a member constituting the water treatment flow path by supplying hot water from the raw water inlet or the purified water outlet instead of the raw water, The activated carbon can be regenerated and the adsorption removal capability of the adsorption treatment section can be recovered without heat loss of the member holding the activated carbon.

According to the second aspect of the invention, since the water contact surface which contacts the water in the second water flow state is made of a heat-resistant material, the water treatment flow path is switched to the first water flow state to supply the raw water. While performing the desired water treatment by the adsorption treatment unit and the filtration treatment unit, the water treatment flow path is switched to the second water passage state and hot water is supplied from the raw water inlet, etc. The activated carbon can be regenerated and the adsorption removal capability of the adsorption treatment section can be restored without heat loss of the member forming the passage, the member holding the activated carbon, and the filtration treatment section.

According to the third aspect of the present invention, the water contact member of the removable adsorption treatment section, that is, the constituent material of the adsorption treatment section other than activated carbon is made of a heat-resistant material. By immersing in activated carbon, the activated carbon can be regenerated and the adsorption removal capability of the adsorption treatment part can be recovered without heat loss of the members other than the adsorption treatment part that constitutes the water purifier and the member that holds the activated carbon.

[0013]

Therefore, according to the first aspect of the present invention, it is very easy to supply hot water as a water purifier in which an adsorption treatment section using activated carbon is arranged in a water treatment passage extending from a raw water inlet to a water purification outlet. With a simple operation, it is possible to recover not only the adsorption / removal ability for the organic chlorine compounds in the adsorption treatment section, but also the adsorption / removal ability for free chlorine, organic substances and odorous components. The entire equipment and the adsorption treatment section can be exchanged for a long time, running costs can be reduced, and there is no heat loss due to hot water of the members that make up the water treatment flow path and the members that hold the activated carbon. Despite the use of water to recover the adsorptive removal capacity, it has become possible to provide a product that can exhibit excellent performance in terms of durability without deterioration in durability.

Further, according to the second aspect of the present invention, the water treatment passage is provided as a water purifier in which an adsorption treatment portion by activated carbon and a filtration treatment portion by a membrane are arranged in a water treatment passage extending from a raw water inlet to a purified water outlet. It is possible to recover not only the adsorption / removal ability for the organic chlorine compounds in the adsorption treatment part, but also the adsorption / removal ability for free chlorine, organic substances and odorous components, by a very simple and easy operation such as switching the It is possible to extend the replacement cycle of the entire water purifier and the adsorption treatment section due to the reduction of the adsorption removal capacity, reduce the running cost, and retain the members constituting the water treatment flow path and the activated carbon. Since there is no heat loss due to hot water in the members and the filtration processing part, there is no decrease in durability and excellent performance in terms of durability despite the use of hot water to recover the adsorption removal capacity. Was able to provide what can Rukoto.

Further, according to the third aspect of the present invention, the adsorption treatment is performed as a water purifier in which the adsorption treatment section using activated carbon arranged in the water treatment passage extending from the raw water inlet to the purified water outlet is constructed as a detachable cartridge. By using the detachability of the adsorption part effectively, the adsorption treatment part can be removed and then immersed in hot water. It is also possible to recover the adsorption / removal capacity for organic substances and odorous components, and it is possible to prolong the replacement cycle of the entire water purifier and the adsorption treatment part due to the reduced adsorption / removal capacity, which can reduce the running cost. Since there is no heat loss due to hot water in the members other than the adsorption treatment part that constitutes the water purifier and the member that holds activated carbon, is it possible to use hot water to restore the adsorption removal capacity? Raz, it becomes possible to provide what can exhibit superior performance in endurance surface without deterioration of the durability.

[0016]

【Example】

[First Embodiment] As shown in FIG. 1, in a water treatment passage extending from a raw water inlet 1 to a purified water outlet 2, an adsorption treatment section A made of activated carbon and a filtration treatment section B made of a membrane are arranged on an upstream side. It is arranged in a state of being located at.

The water treatment channel includes an adsorption treatment chamber RA having the adsorption treatment unit A, a filtration treatment chamber RB having the filtration treatment unit B, a water purifying inlet passage R1, and a backwashing inlet. The flow path R2, the communication flow path R3, the outlet flow path R4, and the discharge flow path R5 are provided. The purified water inlet flow passage R1 is a flow passage for connecting a portion of the adsorption treatment chamber RA upstream of the adsorption treatment unit A to the raw water inlet 1. The backwash inlet flow passage R2 is a flow passage for connecting a portion of the filtration treatment chamber RB on the downstream side of the filtration treatment section B to the raw water inlet 1. The communication flow path R3 is a flow path for connecting a portion of the adsorption treatment chamber RA downstream of the adsorption treatment unit A to a portion of the filtration treatment chamber RB upstream of the filtration treatment unit B in communication. Is. The outlet flow path R4 is a flow path for connecting the downstream portion of the filtration processing chamber RB with respect to the filtration processing unit B to the purified water outlet 2. The discharge flow path R5 is a flow path for communicating the middle of the communication flow path R3 to the outside.

Further, the water treatment flow path is provided with a switching valve mechanism so that the raw water inlet 1 is provided as shown in FIG.
・ Inlet flow path R1 for water purification ・ Adsorption treatment room RA ・ Communication flow path R3
The filtration processing chamber RB, the outlet flow path R4, and the first water flow state for water purification that flows in the order of description, and as shown in FIG. 2B, the raw water inlet 1, the water purification inlet flow channel R1, and the adsorption. Processing room RA
-The communication flow path R3, the discharge flow path R5, and the second water flow state for desorption for passing water in the order described, and as shown in (c) of FIG.
The raw water inlet 1, the backwash inlet channel R2, the filtration chamber RB, the communication channel R3, the discharge channel R5, and the third flushing state for backwashing that allows water to flow in the order described are freely switchable. There is.

An example of the specific construction of the switching valve mechanism will be described. A first valve V for opening and closing the water purification inlet passage R1.
1 and a second valve V2 for opening and closing the backwash inlet channel R2
And a third valve V3 for opening and closing a first portion of the communication flow path R3 that is closer to the adsorption processing chamber RA than a branch part that branches the discharge flow path R5, and a branch portion of the communication flow path R3. Fourth valve V4 for opening and closing the second portion on the side of the filtration processing chamber RB
And a fifth valve V5 for opening and closing the discharge flow path R5. That is, the first valve V1 and the third valve V
Open the 3rd and 4th valves V4, and open the 2nd valves V2 and 5th
By switching the valve V5 to the closed state, the first water flow state is revealed, and the first valve V1, the third valve V3, and the fifth valve V5 are opened, and the second valve V2 and the fourth valve are opened. V4
By switching each of them to the closed state.
The water flow state is revealed, and the second valve V2, the fourth valve V4, the fifth valve V
5 is opened, and the first valve V1 and the third valve V3 are switched to the closed state, so that the third water-passing state is brought out. Incidentally. First valve V1
The second valve V2, the third valve V3, the fourth valve V4, and the fifth valve V5 are related operated by one operating tool.

The adsorption processing chamber RA has a cylindrical body member 3
A bowl-shaped lid member 4A is screwed and attached to both ends of A, and similarly, the filtration processing chamber RB is also configured by screwing and attaching bowl-shaped lid members 4B to both ends of the tubular main body member 3B. The body members 3A and 3B are configured as an integral body.
The adsorption processing unit A is built in the adsorption processing chamber RA, and specifically, two partition plates that partition the adsorption processing chamber RA into three upstream chambers, an intermediate chamber and a downstream chamber. 5, a cylindrical water-permeable activated carbon 6 is arranged in the intermediate chamber so as to partition the central chamber in which the intermediate chamber is concentric with the surrounding annular chamber, and the upstream partition. Board 5
In addition, an inflow hole 7 for communicating the annular chamber with the upstream chamber is formed, and an outflow hole 8 for communicating the central chamber with the downstream chamber is formed in the partition plate 5 on the downstream side. That is, the raw water a is passed through the inflow hole 7, the annular chamber, the inside of the activated carbon 6, the central chamber, and the outflow hole 8 in that order so that the activated carbon 6 is adsorbed when passing through the activated carbon 6. The partition plate 5 and the activated carbon 6 are sandwiched by the lid member 4A.
Is fixed to the main body member 3A.
The activated carbon 6 is fiber activated carbon (specific surface area 1500-2.
000 m ² / g) Felt-shaped molded activated carbon having a density of about 0.2, which is formed by heating at 140 ° C. using a synthetic resin such as acrylic as a binder.

The filtration processing section B is composed of a hollow fiber membrane module, and the hollow fiber membrane module is configured so as to be fixed in position on the main body member 3B by being sandwiched by the projection formed on the main body member 3B and the lid member 4B. Has been done.

The water contact surface which is in contact with water other than the activated carbon 6 and the filtration treatment section B is made of a heat resistant material which can withstand heat of 80 ° C. or higher. More specifically, the purified water inlet passage R1, the backwash inlet passage R2, the outlet passage R4, and the communication passage R
3. Piping material that constitutes the discharge flow path R5 and the adsorption processing chamber RA
Main body member 3A and lid member 4A that make up the main body member 3B and lid member 4B that make up the filtration chamber RB, first valve V1, second valve V2, third valve V3, fourth valve V4, fifth Valve V
5 and the partition plate 5 are made of a heat-resistant material such as heat-resistant synthetic resin.

Thus, the water purifier is supplied with the raw water a from the raw water inlet 1 in the first water-flowing state, whereby the free chlorine and the organic chlorine compounds in the supplied raw water a are adsorbed and removed in the adsorption treatment section A. After that, the raw water a is filtered by the filtration processing unit B, and the purified water b is supplied from the purified water outlet 2 to obtain 8 in the second water passing state.
By supplying hot water c of 0 ° C. or higher from the raw water inlet 1, the activated carbon 6 is desorbed (regenerated) by the supplied hot water c, and adsorption of the adsorption treatment section A is performed without heat loss of the filtration treatment section B. The capacity is restored, and the raw water a is supplied from the raw water inlet 1 in the third water flow state, so that the filtration treatment section B is backwashed to recover the filtration ability.

Therefore, according to the above water purifier, even if the SV value is 1000 or more and the adsorption capacity for the organic chlorine compound such as trihalomethane in the adsorption treatment section A is about ⅕ of the adsorption capacity for free chlorine, By switching to the two-water flow state and supplying hot water c to restore the adsorption capacity of the adsorption treatment section A, the organic chlorine compound can be sufficiently adsorbed and removed. The shape and size of the water purifier can be changed as appropriate, and the size (volume) of the adsorption treatment section A in the water purifier can also be changed as appropriate. For the filtration treatment section B, the hollow fiber membrane module can also be used. The structure can be changed as appropriate such that the installation direction is reversed. Further, in the embodiment, the activated carbon 6 is passed through the thickness direction from the outer circumference to the center, but the passing direction may be from the center to the outer circumference, and further, in the axial direction. By providing a guide for dispersing water, the entire activated carbon 6 in the axial direction may be effectively used for adsorption.

[Second Embodiment] As shown in FIG. 3, a water purifier has an adsorption treatment section A arranged in a main body 10 forming a water treatment flow passage extending from a raw water inlet 1 to a water purification outlet 2 and the adsorption thereof is performed. The processing unit A is configured as a cartridge that is detachable from the main body 10.

The suction processing section, that is, the cartridge A
Is attachable to and detachable from the main body 10, and has an inflow hole 7 and an outflow hole 8
The activated carbon 6 is contained in a housing 11 having The housing 11 is an example of a water contact member that holds the activated carbon 6, and is made of a heat-resistant material (heat-resistant synthetic resin or the like) that can withstand heat of 80 ° C. or higher. The activated carbon 6 is granular activated carbon or fiber activated carbon, and may be the same shaped activated carbon as in the first embodiment.

Therefore, according to the second embodiment, as shown in FIG. 4, the activated carbon 6 is desorbed (regenerated) by taking out the cartridge A from the main body 10 and immersing it in hot water c of 80 ° C. or higher. Thus, the suction capacity of the cartridge A can be restored.

Next, an experiment conducted by the present inventor for investigating the degree of recovery of the adsorption capacity of the adsorption treatment section A for trihalomethane by treating the adsorption treatment section A with hot water will be described. As a specimen of the adsorption treatment section A, fiber activated carbon (specific surface area 1500 to 2000 m ² / g) was heat-molded at 140 ° C. with an acrylic resin as a binder to have a diameter of 50 m.
m, height 25 mm, volume 49.1 cc, density 0.2 g /
cm ³ of shaped activated carbon was prepared.

[Experimental Example 1] Filtration flow rate of 2.5 l / min, S
Raw water is passed through the molded activated carbon at a V value of 3055 to treat it, and the cumulative water flow is 150 l, 300 l, 450 l, 60.
Every time it becomes 0l, take out the molded activated carbon and remove it at 100 ℃, 2l
It is soaked in hot water for 20 minutes for regeneration treatment, and when the water flow starts, the total water flow is 150l, 300l, 450l, 60
At 0 l and 750 l, the amount (unit: μg / l) of trihalomethanes (chloroform, dichlorobrolomethane, chlorodibrolomethane) in the treated water at the restart of each water flow was measured. The results and removal rate are shown in Table 1. The value in parentheses indicates the amount of trihalomethane in raw water. It has been confirmed that trihalomethane can be removed satisfactorily at all times by performing a regeneration treatment by immersing the molded activated carbon in hot water every time the water flow amount reaches 150 liters.

[Experimental Example 2] Filtration flow rate of 2.5 l / min, S
Raw water is passed through the shaped activated carbon at a V value of 3055 to be treated, and when the cumulative amount of water flow reaches 400 liters, the shaped activated carbon is taken out and immersed in 2 liters of hot water at 100 ° C. for 20 minutes for regeneration treatment, The amount (unit: μg / l) of trihalomethane (chloroform, dichlorobrolomethane, chlorodibrolomethane) in the treated water was measured at the start of water flow, at the end of water flow, and at the time of water flow restart. The results and removal rate are shown in Table 2. The value in parentheses indicates the amount of trihalomethane in the raw water. As expected, it can be confirmed that when the cumulative water flow rate is 400 liters, the adsorbing capacity of the molded activated carbon for trihalomethane almost disappears. Even if the molded activated carbon has almost no adsorbed capacity for trihalomethane, its adsorption capacity is regenerated. It was confirmed that it was possible to recover.

[Experimental Example 3] Filtration flow rate of 2.5 l / min, S
Raw water is passed through the molded activated carbon at a V value of 3055 to treat it, and the cumulative water flow is 150 l, 300 l, 450 l, 60.
Every time it becomes 0 l, instead of the water to be treated, 97 to 100 ° C,
20-30 with about 3 liters of hot water at a flow rate of 0.1-0.2 liters / minute
It is regenerated by passing water for a minute, and when the water flow starts, the cumulative water flow is 150l, 300l, 450l, 60
At 0 l and 750 l, the amount (unit: μg / l) of trihalomethanes (chloroform, dichlorobrolomethane, chlorodibrolomethane) in the treated water at the restart of each water flow was measured. The results and removal rate are shown in Table 3. Similarly, the number in parentheses indicates the amount of trihalomethane in the raw water. Even if a treatment of passing hot water through the molded activated carbon is adopted as the regeneration treatment, the regeneration treatment is always performed every 150 liters of water so that the trihalomethane can be removed satisfactorily at all times. It could be confirmed.

[Other Embodiments] In the first embodiment described above, the suction processing section A is of a body built-in type, but as shown in the second embodiment, the suction processing section A is configured as a detachable cartridge. You may implement. In this case, only the water contact member for holding the activated carbon in the cartridge may be made of a heat resistant material.

In the first embodiment described above, the portion not contacted with the hot water c in the second water passing state is also made of the heat resistant material. However, in the present invention, only the portion coming in contact with the second water passing state is made of the heat resistant material. It may be configured.

In the second embodiment, the suction processing section A is constructed as a detachable cartridge. However, as shown in the first embodiment, the suction processing section A may be constructed as a body built-in type. good. In this case, since the activated carbon 6 is regenerated by passing hot water, in addition to the adsorption treatment section A,
The part that the hot water comes in contact with is made of a heat-resistant material.

In the first embodiment, the hot water is supplied from the raw water inlet 1 to regenerate the activated carbon 6. However, the second embodiment
In the water flowing state, let the hot water flow in the opposite direction, that is,
The activated carbon 6 may be regenerated by passing hot water through the discharge flow path R5, the communication flow path R3, the adsorption treatment chamber RA, the clean water inlet flow path R1, and the raw water inlet 1 in the order described. In short, the hot water flow direction when hot water is passed to regenerate the activated carbon 6 is either the raw water flow direction when the raw water is supplied to obtain purified water, or the reverse water flow direction. May be

[0036]

[Table 1]

[0037]

[Table 2]

[0038]

[Table 3]

It should be noted that reference numerals are given in the claims for convenience of comparison with the drawings, but the present invention is not limited to the configurations of the accompanying drawings by the entry.

[Brief description of drawings]

FIG. 1 is a vertical sectional view showing a first embodiment.

FIG. 2 is a schematic cross-sectional view of each water passing state showing the first embodiment.

FIG. 3 is a vertical sectional view showing a second embodiment.

FIG. 4 is a schematic diagram of a reproduction operation state showing a second embodiment.

[Explanation of symbols]

 1 Raw water inlet 2 Clean water outlet A Adsorption treatment unit B Filtration treatment unit

 ─────────────────────────────────────────────────── ─── Continuation of the front page (72) Inventor Goro Fujiwara 1-3-3 Dojimahama, Kita-ku, Osaka-shi, Osaka Takuma Co., Ltd. (72) Mitsunobu Masuda 1-3-3 Dojimahama, Kita-ku, Osaka-shi, Osaka No.23 Takuma Co., Ltd. (72) Inventor Shinya Matsumoto, Yamazaki, Shimamoto-cho, Mishima-gun, Osaka 1023-1 Santory Co., Ltd. Bioprocess Development Center (72) Shinichi Kunisaki Shimazaki, Shimamoto-machi, Mishima-gun, Osaka Yamazaki 1023-1 Suntory Corporation Technology Development Center

Claims (3)

[Claims] 1. A water purifier in which an adsorption treatment section (A) using activated carbon is arranged in a water treatment flow path from a raw water inlet (1) to a water purification outlet (2), and the water contact surface withstands heat of 80 ° C. or higher. Water purifier made of heat-resistant material. 2. A water purifier in which an adsorption treatment section (A) using activated carbon and a filtration treatment section (B) using a membrane are arranged in a water treatment passage extending from a raw water inlet (1) to a water purification outlet (2),
The water treatment flow path can be switched between a first water passage state in which water is passed through the adsorption treatment section (A) and the filtration treatment section (B) and a second water passage state in which water is passed only through the adsorption treatment section (A). The water contact surface that comes into contact with water in the second water passing state is set to 80
A water purifier made of heat-resistant material that can withstand heat above ℃. 3. A water purifier comprising an adsorption treatment section (A) made of activated carbon arranged in a water treatment passage extending from a raw water inlet (1) to a water purification outlet (2) in a removable cartridge. A water purifier in which a water contact member for holding activated carbon in the treatment section (A) is made of a heat-resistant material that can withstand heat of 80 ° C or higher.