JPS5847991Y2 - Pure water production equipment - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to an apparatus for producing pure water by distilling and (or) ion-exchanging water, and particularly relates to a pure water producing apparatus that is easy to maintain and can be used continuously over a long period of time.

Traditionally, distillation equipment or ion exchange equipment have been used as pure water production equipment, and when particularly high purity is required,
Some devices integrate a distiller and an ion exchanger into an apparatus to perform both distillation and ion exchange.

In general, such a pure water production apparatus automatically performs the following operations: supply of raw water, heating, distillation, ion exchange, storage, and drainage 1.

When tap water itself is used as raw water, in conventional distillation equipment, metals in the tap water precipitate in the form of CaCO3, MfC03, etc., and a large amount of this adheres to the boiler as limescale (so-called water scale).

Therefore, normally, after several hours of distillation, the water in the boiler must be drained and washed, which is very time-consuming and inefficient.

In a shredded ion exchange device, the ion exchange resin deteriorates quickly due to anions in the tap water.

In order to suppress this deterioration, a reverse osmosis attachment may be installed. This attachment is extremely expensive and requires additional ion exchange equipment.

There are also systems that pass tap water through activated carbon before supplying it, but since the ions in the tap water are not removed even after passing through the activated carbon, neither the amount of scale adhering to the boiler nor the deterioration of the ion exchange resin is significantly improved.

It is an object of the present invention to provide a pure water production apparatus which can be used continuously for a long time without the above-mentioned conventional problems, and which is extremely easy to maintain.

For this purpose, the pure water production apparatus according to the present invention is provided with an electrolysis section upstream of the distillation section or ion exchange section, and the acidic water from the electrolysis section is distilled or ion exchanged. be.

Hereinafter, embodiments of the present invention will be described with reference to the drawings.

FIG. 1 is a side view schematically showing a pure water production apparatus according to an embodiment of the present invention.

In this embodiment, a cooler 7 and a distillation boiler 6 are installed upstream (on the upstream side) of an ion exchanger (ion exchange section) 8.

This cooler 7 and distillation boiler 6 constitute a distillation section 13.

An electrolytic cell 1 is installed upstream of a distillation boiler 6.

The electrolytic cell 1 of the illustrated embodiment is of a so-called continuous type, for example, connected to a water faucet, tap water is supplied from a supply port 14 at the bottom of the tank, and anode rods are spaced concentrically in the tank. 4. The water is separated into acidic water and alkaline water by the action of the diaphragm 5 and the cathode 3, and is continuously sent out from the top of the tank.

Reference numeral 2 denotes a power source for supplying electricity to the anode rod 4 and the cylindrical cathode 3.

Acidic water flows out from the water spout 9 that communicates with the anode rod 4 inside the diaphragm, and is supplied to the distillation boiler 6, where it is heated, distilled, cooled, and ion exchanged, and is then purified from the water sampling port 10 as pure water. taken out.

The alkaline water discharged from the discharge port 11 communicating with the cathode 3 of the electrolytic cell 10 is used for drinking or other arbitrary purposes.

In such a treatment process, metal ions are removed from the acidic water on the anode side by ionization, leaving only anions.

Therefore, even when such acidic water is distilled and ion-exchanged, the distillation boiler 6 is hardly contaminated by scale, and deterioration of the ion exchange resin in the casing is also prevented.

Although the above-mentioned embodiment is an example in which ion exchange treatment and distillation treatment are used together and the electrolytic cell 1 is provided upstream of the distillation section 13, the present invention is not limited to such an embodiment.

FIG. 2 is a schematic diagram of a pure water production apparatus in which a switching valve is used to switch the subsequent treatment of acidic water from an electrolytic cell.

In this case, pure water can be produced in four ways.

In the first embodiment, the acidic water from the electrolytic cell 1 is transferred to the four-way valve 15
The water is sent to the distillation unit 13 through the water, undergoes distillation treatment, and is collected as pure water in the case 1.

In the second embodiment, the distilled water discharged from the distillation section 13 is sent to the ion exchange section 8 by the two-way switching valve 16 and subjected to ion exchange treatment, and is taken out as pure water that has undergone the distillation and ion exchange treatment.

In the third aspect, acidic water is supplied from the four-way valve 15 to the ion exchange section 8.
The water is sent to a water tank and collected as pure water through ion exchange.

In the fourth aspect, the ion-exchanged water according to the third aspect is sent to the distillation section 13 by the two-way switching valve 17, and is taken out as pure water that has undergone ion exchange and distillation treatment.

It is also possible to take out the acidic water from the electrolytic cell 1 through one outlet 18 of the four-way valve 15 and use it as sterilized water or a beauty serum.

The four-way valve 15 is not limited to a specific one, but may include, for example, four openings 19, 20,
A cylindrical type valve seat 23 having a cylindrical inner circumferential surface with 21 and 22, and a valve element 26 having two gate grooves 24 and 25 on the periphery attached so as to be rotatable about one axis of the valve seat 23. A four-way valve is preferably used.

When it is desired to simultaneously supply acidic water from the electrolyzer 1 to the distillation section 13 and the ion exchange section 8 in parallel, the fourth
It is best to provide a four-way valve as shown in the figure.

The four-way valve in this case is a modification of the four-way valve shown in FIG.
The wall thickness t of 6 is the opening 19.20, 21.2 of the valve seat 23.
This allows the four paths connected to the opening to be placed in two different communication states (one state is shown by a broken line in the figure) and a fully open state (solid line).
It is designed to switch between two states.

In this case, for example, the opening 19 is connected to the distillation section 13, the opening 20 to the electrolytic cell 1, and the opening 21 to the ion exchange section.

Although the above-mentioned configuration drastically reduces the amount of limestone adhering to the distillation boiler 6, metal ions in tap water such as Caco3 and Mf
? Precipitation adheres to the cathode 3 and diaphragm 5 of the electrolytic cell 1 as CO3, reducing electrolysis efficiency.

Therefore, in the embodiment of the present invention, the cathode 3 button and the diaphragm 5
The electrolytic cell 1 can be replaced as a single unit.

FIGS. 5a and 5b show an embodiment of the present invention, and are a longitudinal sectional view and a transverse sectional view of a cathode diaphragm cartridge 30 that is attached to and removed from an electrolytic cell.

A cathode 332 made of a thin metal plate (foil) such as stainless steel is attached to the inner surface of a plastic case 31, and a hollow diaphragm 33 is fixed to the center of the cathode 332.

This cartridge 30 is housed in the electrolytic cell 1 (Fig. 1) with the anode rod (Fig. 1) inserted into the diaphragm 33, and after a certain period of use, it is removed and discarded, and a new cartridge is installed. Installing.

In the present invention, the electrolytic cell is not limited to those of the embodiments described above, but may be a so-called batch type electrolytic cell, and a diaphragm is not necessarily required. It may also be of a type in which a partition wall is installed to separate the cathode and the cathode.

[Brief explanation of the drawing]

FIG. 1 is a schematic side sectional view of a pure water production apparatus according to one embodiment of the present invention, and FIG. 2 systematically shows the internal configuration of a pure water production apparatus according to another embodiment of the present invention. Figure 3 is a vertical sectional view of a four-way valve applied to the present invention, Figure 4 is a cross-sectional view showing another example of the four-way valve, and Figures 5 a and b are views of the cathode and diaphragm cartridges, respectively. FIG. 2 is a vertical cross-sectional view and a cross-sectional view. 1... Electrolytic cell, 3, 32... Cathode, 4
...Anode, 5,33...Diaphragm, 8...
...Ion exchanger (ion exchange section), 9...
・Acidic water discharge port, 13... Distillation section, 15...
...4-way valve, 16, 17...--All changeover valve, 30.
...Cathode, diaphragm cartridge.

Claims (1)

[Scope of claim for utility model registration] ■ An electrolysis section is provided before the distillation section or ion exchange section,
A pure water production device characterized by distilling or ion-exchanging acidic water from the electrolytic section. 2. The pure water production apparatus according to claim 1, wherein the electrolytic section is such that the cathode and the diaphragm are replaceable as a unit.