KR200273793Y1 - Electro-chemical cell and it's application for the disinfection of small-scale water supply system - Google Patents

Abstract

Invented the electrolytic sterilization cell for the production of mixed oxidants for the purpose of sterilization and disinfection of tap water for simple water supply, and the complex oxidant produced in the electrolytic sterilization cell. It is designed to sterilize and disinfect bacteria in water by supplying it in a suitable amount of water as sterilizing water to maintain the residual chlorine concentration in the water about 0.5-1.0ppm.

Description

Electrolytic cell and it's application for the disinfection of small-scale water supply system

At present, most of the sterilization sterilizers for sterilizing water drop solid chlorine at regular time intervals to disinfect and disinfect the solid chlorine while generating HOCl. However, since they are solid, accurate concentration control is impossible.

The present invention is to electrolyze the brine using an electrolytic cell to generate a complex oxidant to generate sterilization water of the correct concentration in the water to sterilize.

This method is simpler and more stable than the regular and frequent supply of solid chlorine.

Mountain wallpaper that does not benefit from water supply is used to disinfect groundwater, surface water, or elution water by using a simple disinfection system for homes. This disinfection system can be broadly divided into a well and a water tank.

Most of these disinfection systems are systems that automatically inject a certain amount of solid chlorine once a certain time, or dissolve solid chlorine in water and inject it into a liquid state. However, this method introduces solid tablets, which makes it difficult to adjust the concentration precisely, breaks down due to corrosion caused by chlorine gas, and requires frequent filling of solid chlorine. It was also difficult to apply. Another method is to prepare acidic water by electrolytic method and use it as sterilizing water. However, the problem with this method is that alkaline water comes out as much as acidic water comes out. Since it is used, calcium carbonate, magnesium carbonate, or the like adheres around the negative electrode, resulting in poor electrolytic performance.

The present invention is a next-generation sterilization system that produces and disinfects complex oxidants using salt water and electric energy, which does not generate toxic chlorine gas, unlike solid chlorine. It is not stable.

Unlike general electrolytic method using general diaphragm, it uses anion exchange membrane (Fig. 2 ③), so it does not discharge water and saves water. Anion exchange membrane (Fig. Since it does not pass through, it generally does not produce a substance such as calcium carbonate attached to the electrode, so the electrode can be used for a long time and need not be cleaned and maintained by acid. In particular, refined solid chlorine does not control the exact concentration of residual chlorine, but this system, which can generate the correct complex oxidant, is injected into the raw water at the correct concentration.

The present invention is equipped with an electrolytic cell for sterilization and disinfection in a storage tank for simplified water supply, which can utilize solar heat or electric energy, and is a device designed to automatically supply the mixed NaC1 and HCl solution (2). The electrolyte cell (8) part is immersed in the water supply storage tank, and the control part (3) containing the solution is installed on the tank so that only the solution in the solution container can be changed regularly. In this case, as a method of disinfecting or sterilizing by generating a complex oxidant electrochemically in the electrolytic cell 8 in water, it is a schematic diagram in which the tubular electrolytic cell 8 is installed as shown in FIG. 1.

2 shows the structure of the electrolytic cell 8, in which an anion exchange membrane (FIG. 2 ③) is used as a separation membrane, and a negative electrode (FIG. 2 ①) is provided inside, and a positive electrode (FIG. 2 ④) is provided outside. When electrical energy is applied, ions move, but only anions move because they use an anion exchange membrane (Fig. 2 ③). The mixed solution used inside the tube is a mixed solution of NaCl solution and HCl solution, and is automatically supplied from the mixed solution tank on the tank. Therefore, a device for supplying the solution is not required, that is, a metering pump.

The problem to be achieved by the present invention is to control the concentration of the sterilizing water generated in the electrolytic cell (8) by combining the size of the electric energy and the cell to maintain the concentration of residual chlorine supplied to the home is more than 0.2ppm reference value Therefore, it is always possible to supply sterilized drinking water. When using for a long time to solve this problem by using a mixed solution in order to prevent the drop in performance by increasing the pH on the solution side, that is, the negative electrode (Fig. 2 ①) is characterized in that it can be used for a long time.

1

(1) solar panels (2) solution tanks

(3) Controller (4) Mixed Solution

(5) Tube (6) Water Tank

(7) Water level (8) Electrolytic cell

2

① Cathode ② Pore separation structure

③ Ion exchange membrane ④ Anode

In order to achieve the above object, the present invention devised a system equipped with a unit electrolytic cell 8 as shown in FIG. 1. This system, which can be installed in a water tank of a simple water supply facility, provides a solution tank for supplying a solution to a submerged electrolysis cell (8), a controller (3), and an electrolysis cell (8) and removing hydrogen gas. 2) is installed and connected by the tube or tube so that the solution of the solution tank can be supplied to the electrolyte cell. The hydrogen generated from the electrolytic cell family rises through this tube and is discharged. It is configured to gradually lower the pH while gradually spreading toward the solution tank located upwards through the tube by convection.

When electrical energy is transferred to an electrolytic cell, ions move as electrolysis occurs. Reaction and movement of ions centering on the negative electrode (Fig. 2 ①) inside the Zenha cell and the positive electrode (Fig. 2 ④) on the other side. This will occur.

In particular, the composite oxidant of chlorine ions, chlorine gas, and ozone is generated toward the positive electrode, and this complex oxidant having a high concentration is controlled so as to have an appropriate amount of residual chlorine in the tank.

Specifically, as shown in FIG. 2, the electrolytic cell is composed of a negative electrode (FIG. 2 ①), a separation structure of pores (FIG. 2 ②), an anion exchange membrane (FIG. 2 ③) and an anode (FIG. 2 ④). It is filled in the inner cell. This internal solution consists of a mixed solution of brine and HCl.

At this time, the positive electrode (Fig. 2④)

^{_{H 2 O → H + + OH}} -

_{^{40H - - 4e - → 2H 2}} 0 + 0 2

^{_{H 2 0 +0 2 - 2e -}} → O 3 ↑ + 2H +

^{2C1 - - 2e - → 2C1 →} Cl 2

_{Cl 2 + H 2 0 → HOC1} + H + + Cl -

In addition, in the negative electrode (Fig. 2①)

^{_{2H 2 0 + 2e - → 20H}} - + H 2 ↑

As shown in the reaction of the positive electrode side, that is, the outside of the electrolytic cell, complex oxidants such as ozone and chlorine are generated. In addition, the use of anion exchange membrane (Fig. 2 ③) to minimize the movement of the cations to solve the problem that the various salts stick to the electrode to minimize the performance.

However, it is the water purifier according to the general electrolytic method that 0H ⁻ is generated at the negative electrode and the pH is increased. Here, in order to prevent the concentration of Cl ions from dropping because OH ⁻ and Cl ⁻ are simultaneously released to the outside through the ion exchange membrane. in the subject innovation in order to prevent an increase in the concentration of it was used as a solution of HCl OH generated as follows: ^{- -} OH, so that the H ⁺ and the reaction produced by the decomposition of HCl up 0H ^- increased due to the increase of pH and There was no phenomenon that performance fell.

H ⁺ (the remaining HCl is ionized proton) + OH ^- → H ₂ 0

The positive electrode used in the present invention is a platinum-coated titanium electrode, the negative electrode was used a carbon electrode, the type of electrode may be used, such as iridium-coated titanium electrode.

The present invention is a sterilization disinfection system using the advantages of mixed oxidants generated in an electrolytic sterilization cell, and does not generate toxic chlorine gas compared to a device using solid chlorine. Not damaged. In addition, unlike normal chlorine disinfection, strong oxidizing power provides clean drinking water and does not produce THMs, a cancer-causing substance. In addition, it can be used for sterilization and disinfection of large capacity drainage pools or swimming pools using electrolytic sterilization cells, and can be used for sterilization devices for water tanks using only solar energy because it is non-powered.

Instead of toxic solid chlorine, it can be used by electrolysing salt water, and it is easy to manage because the mixed solution can be easily replaced.

Claims (3)

It uses a tubular negative ion exchange membrane and surrounds the electrode network to increase the area of the positive electrode on the outside, and the negative electrode is installed inside, and consists of a tubular mixed solution storage tube connected to the tube type anion exchange membrane. Configured sterilizer. The sterilization apparatus according to claim 1, wherein a platinum coated titanium or carbon fiber woven fabric is used to surround the tubular negative ion exchange membrane to have a large area as a positive electrode. The method according to claim 1, wherein the tube connected to the anion exchange membrane tube is filled with a salt solution of high concentration or a mixed solution made by mixing a salt solution with a hydrochloric acid solution to prevent the pH from rising and at the same time prevent the performance degradation caused by the increase of OH ions. And sterilizers that do not receive the solution from the outside