JP3545378B2 - Water purifier - Google Patents

Description

【００１７】
なお、浄水器としては、クリンスイ（ポリエチレン多孔質中空糸膜使用三菱レイヨン社製浄水器）を、家庭の水道水の蛇口に直結して使用した。
【００１８】
【発明の効果】
本発明の浄水器は、濾過機構として鉛除去機能を有しており、これまでの活性炭や中空糸膜からなる浄水器ではなし得なかった極めて効能率な鉛除去が可能となり、本発明の浄水器を使用することによって水道水をより安全度の高いものとすることができる。
【図面の簡単な説明】
【図１】本発明の浄水器の一例を示した縦断面図である。
【符号の説明】
１ 本体容器
２ モジュール
３ 活性炭層
４ 中空糸膜
５ 原水注入口
６ 浄水吐出口
７ 吸着濾過層[0001]
TECHNICAL FIELD OF THE INVENTION
The present invention relates to a water purifier used mainly by being connected to a tap water tap, and more particularly to a water purifier having a filtration mechanism capable of adsorbing and removing a lead component dissolved or suspended in tap water or the like.
[0002]
[Prior art]
Water purifiers have been used to remove residual chlorine, other odor components, organic substances, etc. in tap water by using activated carbon alone.By using a porous hollow fiber membrane together, it can be removed using only colloid components and activated carbon. It also has a function of removing bacteria and the like that are difficult to remove, and it is possible to provide safe and delicious water.
[0003]
In addition, in order to more efficiently remove microorganisms such as bacteria that are difficult to remove only with the function of these water purifiers and to improve the sterilization effect, a sterilizing agent such as silver is mixed or added to the filtration mechanism of activated carbon and the like used in the water purifiers. Various methods have been proposed and attempted, for example, UV irradiation or ozone treatment.
[0004]
[Problems to be solved by the invention]
However, these treatments are effective for removing microorganisms and chlorine-based component substances, but are not suitable for removing heavy metal component substances eluted in water. In particular, tap water, which is the main source of drinking water, has been used as a pipe material (although it has recently been discontinued), and lead pipe has been used so far. Despite meeting the acceptance criteria set by the Ministry of Health and Welfare, etc., which are set based on the degree of harm, the fine particles of lead ingested from tap water are easily absorbed by the intestinal tract, etc., and are accumulated in blood and bone There is a problem from the viewpoint of safe water.
[0005]
Among such lead components, the fine particles suspended in water are obtained by stretching polyolefin-based highly oriented crystalline hollow fibers, and have a multi-layer structure with a micro-laminated structure connected to the peripheral wall. It has been confirmed that it can be removed to some extent by using a porous hollow fiber membrane consisting of strip-shaped fine pores, and it is known that those dissolved in water can be removed to some extent by activated carbon. It is difficult to say that it is enough.
[0006]
An object of the present invention is to provide a water purifier that has a function of removing lead components dissolved in tap water and the like in addition to a purification function that a water purifier basically has.
[0007]
[Means for Solving the Problems]
The gist of the present invention is that a filtration mechanism composed of an adsorbent containing at least an adsorption filtration layer of a lead component substance dissolved or suspended in raw water and a porous hollow fiber membrane is housed in a module, and the module is a main body. While being stored in the container, water from the raw water inlet flows downward from the top through a water passage formed between the periphery of the module and the main body container, and the raw water inflow portion of the module and the A water purifier configured to change its direction in a water passage formed between itself and the bottom of a main body container, and then to flow inside the module from bottom to top, wherein the raw water inflow portion of the module and the main body A water purifier characterized in that a water passage formed between the container and the bottom is narrowed from the periphery toward the center .
When the adsorption filtration layer of the lead component substance is made of any one of an ion exchange resin, an iron oxide hydroxide, a poly (malenic anhydride-modified polystyrene resin), a poly (acrylamide oxime) resin, and an amide oxime-treated product of a PAN fiber, lead is removed. High performance is preferable.
Also, the adsorptive filtering layer of the lead component material, be arranged as a separate layer alone, it is preferable respectively to mix with activated carbon.
[0008]
As the hollow fiber membrane used for the filtration mechanism of the water purifier of the present invention, a precision filtration membrane or an ultrafiltration membrane having a bacteria removing performance is used, and a polyolefin-based, polysulfone-based polyester-based, polyamide-based or any other suitable membrane is used. Use of things is possible. From the viewpoint that the hollow fiber membrane itself has a lead removing function, a polyolefin-based hollow fiber membrane comprising a large number of strip-shaped fine pores having a micro-laminated structure connected to the peripheral wall as described above is preferable. .
[0009]
Examples of the adsorbent used for the adsorption filtration layer of the lead component substance include ion exchange resins, hydrous iron oxide, poly (malenic anhydride-modified polystyrene resin), poly (acrylamide oxime) resin, and amide oxime-modified PAN fibers. Can be used, and the adsorbent can be used as it is or by being supported on another substance.
[0010]
These adsorbents may be provided in the filtration mechanism as a single independent layer, or may be used together with the activated carbon layer in a state of being mixed with the activated carbon. It is also possible to use a mixture with the potting resin of the hollow fiber membrane.
[0011]
[Action]
When raw water such as tap water passes through the adsorptive filtration layer, it is dissolved or suspended in tap water or the like by the adsorbent of the lead component substance present in the adsorptive filter layer provided as a filtration mechanism of the water purifier when the raw water passes therethrough. Lead components are selectively adsorbed and removed.
[0012]
【Example】
Hereinafter, embodiments will be described in detail with reference to the drawings.
FIG. 1 is a longitudinal sectional view showing an example of a water purifier of the present invention, wherein 1 is a main body container, 2 is a module housed in the main body container, 3 is an activated carbon layer, 4 is a hollow fiber membrane, and 5 is raw water injection. An inlet, 6 is a purified water discharge port, and 7 is an adsorption filtration layer of a lead component substance.
[0013]
In FIG. 1, raw water injected from a raw water inlet 5 passes through an activated carbon layer 3 to remove residual chlorine, other odor components, organic substances, and the like in tap water. It reaches the adsorption filtration layer 7 provided in the middle, the lead component is selectively adsorbed and removed, and reaches the next hollow fiber membrane layer 4, where fine suspended dust, colloid components, and chlorine Bacteria and the like that are difficult to remove by sterilization alone are removed. At this time, since the water is configured to flow in the vertical direction, a short path of water hardly occurs when the water passes through each layer, so that the performance of the activated carbon and the adsorption layer can be sufficiently exhibited.
[0014]
In FIG. 1, the adsorption filtration layer 7 is provided between the activated carbon layer 3 and the hollow fiber membrane layer 4, but the adsorption filtration layer 7 is provided at a position upstream of the hollow fiber membrane layer 4. For example, it may be provided immediately before the activated carbon layer 3.
Further, as described above, the adsorption filtration layer 7 may be provided in the filtration mechanism as a single independent layer, or may be used together with the activated carbon layer in a state of being mixed with the activated carbon. Further, it may be mixed with the potting resin of the hollow fiber membrane.
[0015]
As a more specific embodiment of the present invention, purified water having a filtration mechanism (A) composed of a combination of a polyethylene porous hollow fiber membrane and activated carbon, and a filtration mechanism (B) of the invention as shown in FIG. The raw water was filtered by a vessel to conduct a lead removal test in the raw water. The results were as follows.
[0016]
[Table 1]

[0017]
As a water purifier, a clean water purifier (water purifier manufactured by Mitsubishi Rayon Co., Ltd. using a polyethylene porous hollow fiber membrane) was directly connected to a tap water at home.
[0018]
【The invention's effect】
The water purifier of the present invention has a lead removal function as a filtration mechanism, and enables extremely efficient lead removal that could not be achieved with a water purifier made of a conventional activated carbon or hollow fiber membrane. By using a container, tap water can be made more safe.
[Brief description of the drawings]
FIG. 1 is a longitudinal sectional view showing an example of a water purifier of the present invention.
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 1 Main body container 2 Module 3 Activated carbon layer 4 Hollow fiber membrane 5 Raw water inlet 6 Purified water outlet 7 Adsorption filtration layer

Claims (4)

A filter mechanism comprising at least an adsorbent containing at least an adsorption filtration layer of a lead component substance dissolved or suspended in raw water and a porous hollow fiber membrane is housed in a module, and the module is housed in a main body container. At the same time, water from the raw water inlet flows downward from the top through a water passage formed between the periphery of the module and the main body container, and the water flows between the raw water inflow portion of the module and the bottom of the main body container. A water purifier configured to change its direction in a water passage formed therebetween and then flow upward in the module from bottom to bottom, wherein the water purifier is disposed between a raw water inflow portion of the module and a bottom portion of the main body container. The water passage formed in the water purifier is formed so that it may become narrower from the periphery toward the center . 2. The adsorption filtration layer of the lead component substance is made of any one of an ion exchange resin, an iron oxide hydroxide, a poly (malenic anhydride-modified polystyrene resin), a poly (acrylamide oxime) resin, and an amide oxime-modified PAN fiber. Water purifier. 3. The water purifier according to claim 1, wherein the lead component substance adsorption filtration layer is provided as a single independent layer . 4. The water purifier according to claim 1 or 2, wherein the adsorption filtration layer of the lead component substance is mixed with activated carbon .

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