Method of purifying water and apparatus therefor

A water purification device and water purification technology are applied to chemical instruments and methods, descaling and water softening, water/sewage treatment, etc., which can solve the problems of increased cooling water costs, air pollution, and large costs, and achieve life extension, The effect of prolonging life

Inactive Publication Date: 2009-07-08
KOGANEI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Then, the cations condense into scale, which adheres to the heat exchange surface of the condenser 66, reducing the heat exchange efficiency, and adheres to the inner surface of the circulating cooling water pipe, increasing the flow resistance of the cooling water.
[0009] In addition, miscellaneous bacteria such as algae and Legionella proliferate in large quantities in the cooling water, and the cooling water is sprayed out from the cooling tower together with these miscellaneous bacteria, causing a problem that disturbs the health of people who move around the cooling tower, and disturbs the health of local residents.
[0010] Therefore, it has been adopted to add tap water or ground water to the cooling water to reduce the concentration of cations and prevent scale from occurring. However, in places where the price of tap water or ground water is high, the cost of cooling water increases, and the maintenance of air conditioners Increased management costs, disadvantages
[0011] Therefore, in companies that cannot purchase tap water or groundwater at low prices, they have adopted a method of adding chemicals to the circulating cooling water to control the electrical conductivity of the cooling water and prevent scale from adhering to the heat exchange surface of the condenser and the inside of the piping. However, this method also requires a lot of cost because the chemical must be added periodically
[0012] In addition, even if chemicals are added to the cooling water, the heat exchange of the condenser and the scale adhesion on the inner surface of the piping cannot be completely avoided. Although the time limit for the removal work is extended, it is still necessary to remove the attached scale. , the time and expense for this are unavoidable
[0013] In addition, the plan of adding fungicides to cooling water was adopted to deal with the reproduction of algae and miscellaneous bacteria, but the reproduction of algae and miscellaneous bacteria could not be avoided for a long time, and it diffused from the cooling tower into the atmosphere together with the fungicides, and there was a problem of polluting the atmosphere

Method used

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  • Method of purifying water and apparatus therefor
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  • Method of purifying water and apparatus therefor

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0123] The water of the cooling tower of 120 refrigerated tons was extracted from the circulation path, purified by the apparatus of the present invention, and returned to the circulation path after purification.

[0124] The electrode assembly 14 of the device of the present invention uses two types of electrode assemblies, A and B. The electrode assembly of pattern A is composed of 36 titanium plates and 36 aluminum plates each with a width of 300mm × a height of 600 mm × a thickness of 1 mm, a total of 72 plates, which are alternately opposed at 12.5 mm intervals (refer to figure 2 ). In addition, the electrode assembly of style B is made of titanium plate with width 300mm x height 600mm x thickness 1mm and 15mm×600mm×3 aluminum round rods are used as a component, and a total of 36 components are formed opposite each other (refer to image 3 ). In addition, the DC power supply device 16 uses a DC stabilization power supply device, and supplies a constant current of 6 A...

Embodiment 2

[0128] The current density flowing in the electrode assembly was changed to three types, 1A / m2, 2A / m2, and 3A / m2, and a table experiment on a scale of about 1 / 35 of Example 1 was carried out, and the cycle treatment was carried out. As a result, the conductivity of water like Figure 12 (a), (b). This experiment shows that the higher the current density, the lower the conductivity of water. However, in the case of either of the electrode assemblies 14 of the styles A and B, the decrease in the conductivity of the water did not show a large difference.

[0129] In addition, the current density flowing in the electrode assembly was set to 0.5A / m2, 1A / m2, 4A / m2, 10A / m2, 20A / m2, and a table-top experiment on a scale of about 1 / 35 of Example 1 was carried out, and the cycle was carried out. processing, the result is Figure 13 As shown in (a), (b), the conductivity of water is reduced. This experiment shows that the greater the current density, the faster the reduction in the e...

Embodiment 3

[0131] Continued operation for one week under the conditions of Example 1 resulted in a little residual scale adhering to the electrode surface, but the adhesion was hardly firm, and the peeled scale was well deposited on the bottom of the electrolytic cell. In addition, in the case of either of the electrode assemblies 14 of the styles A and B, the deposition of the peeled scale did not show a large difference.

[0132] The results of chemical analysis of its components are shown in the upper column of Table 1. The titanium component of the positive electrode is about 40% due to insulation damage, the aluminum component of the negative electrode side that is considered to be corroded by electric corrosion is about 11%, and the remaining complement constitutes scale. ingredients. In addition, in the case of any of the electrode assemblies 14 of the styles A and B, there was almost no difference in the scale components.

[0133] 【Table 1】

[0134]

[0135] In addition, as ...

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Abstract

A cooling water cleaning method and cooling water cleaner in which maintenance cost is reduced as much as possible by eliminating troublesome cleaning work for taking out an electrode from an electrolytic cleaning cell and removing scale in the electrolytic cleaning cell. In a water cleaning method or a water cleaner for cleaning water by feeding water to be treated between opposing electrodes, applying a DC voltage between the electrodes and electrodepositing cations in the water to be treated on the electrode on the negative electrode side, titanium is employed on the positive electrode side and aluminum or aluminum alloy is employed on the negative electrode side as the electrode, and a current sufficient for applying a voltage causing dielectric breakdown of an anode oxide coating formed on the surface of the electrode on the positive electrode side is fed between the opposing electrodes. Scale generated by and adhering to the negative electrode side is automatically exfoliated and removed through electric corrosion on the negative electrode side.

Description

technical field [0001] The present invention relates to a water purification method and an apparatus thereof, for example, by electrochemical methods to remove scale contained in cooling water for equipment such as offices or factories, cooling water circulating between condensers of air conditioners used for refrigeration and cooling towers, etc. Compositional water purification method and apparatus therefor. Background technique [0002] Figure 17 It is an explanatory diagram of the air-conditioning system. As shown in the figure, the air conditioner 64 has a compressor (not shown) that compresses the refrigerant gas; a condenser 66 that cools the compressed and heated refrigerant gas with cooling water and condenses it; An evaporator (not shown) into which the refrigerant liquid obtained after being condensed by the condenser 66 flows and evaporates. [0003] In order to cool the refrigerant gas flowing in the condenser 66 , the condenser 66 is provided in the cooling ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C02F1/461C02F5/00
CPCC02F2001/46119C02F2001/46133C02F2209/04C02F2201/4617C02F2201/4613C02F1/4602C02F2209/05C02F2103/023C02F2201/46125C02F5/00C02F1/461
Inventor 仲野崇行
Owner KOGANEI
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