JPS63123488A - Injection of water treatment agent - Google Patents

Abstract

PURPOSE:To prevent generation of qualitative deterioration of water by supplying a chemical solution through a liquid permeable inlet provided with a member having capillary action. CONSTITUTION:One end of a member having capillary action is inserted and arranged in a container filled with a water treatment agent through an opening of the container. Then the other end is immersed and installed in a liquid to be treated, and a chemical solution is supplied to the water to be treated little by little through the member. As a member having capillary action, unwoven cloth consisting of natural, synthetic or recycled fiber is used. Thus the qualitative deterioration of water can be inhibited and prevented for a long time.

Description

Detailed Description of the Invention [Industrial Application Field] The present invention relates to a method for injecting water treatment agents such as slime prevention, scale prevention, corrosion prevention, etc. The present invention relates to a method for injecting a drug.

[Prior art and its problems]

As is well known, when refrigerators, air conditioning equipment, etc. are operated for a long period of time, slime caused by microorganisms in the cooling water system or drain drainage system, scale caused by concentrated precipitation of water hardness components, and piping. Due to corrosion, rust and other adhesion occurs, which reduces heat exchange efficiency and causes problems such as pipe blockage and water overflow.

Numerous studies and reports have been made regarding methods for removing or preventing these water problems. For example, methods using physical means or treatment methods using chemicals are known for removing obstacles. Among these methods, the removal method using physical means requires the operation to be stopped for a long period of time, and also has the disadvantage that it is extremely difficult to remove the material using curved and thin tubular objects, and it is not possible to remove the material sufficiently. In addition, removal methods that use chemicals include dissolution treatment with acids or alkalis, or removal treatment with oxidizing agents such as hydrogen peroxide, but these methods can cause corrosion damage to the equipment material and waste liquid treatment. There are various problems such as the need for

On the other hand, methods using various drugs are known to prevent disorders, but these drugs are essentially water-soluble and must be injected continuously or intermittently for a certain period of time to maintain their effects. It is necessary to do this. There are disadvantages in that it is necessary to install a special injection device for this purpose and maintenance is essential.

For example, if a liquid or solid drug is to be injected or dissolved in small quantities into a large volume of cooling or drain water for continuous failure prevention, it can be dripped gradually or liquid-permeable micropores can be used. Methods include gradually adding the solid through a membrane or the like, or gradually dissolving the solid by reducing its solubility.

Such an injection method requires a device or a container, for example a special container with a lid provided with a liquid-permeable membrane. When using such a container, it is generally necessary to put the container itself into the water to be treated, and the liquid-permeable membrane surface must be in contact with the liquid or immersed in the liquid. For this reason, if the liquid depth is shallow, the device cannot be used as intended and the chemical solution cannot be injected.

Alternatively, if a solid drug is used, it must be processed into a solid with low solubility. Furthermore, when using the dripping method, the droplet amount changes greatly depending on changes in the liquid head, making it difficult to always adjust the droplet amount to a uniform amount, or the dripping port may become clogged with foreign matter, making it difficult for the chemical solution to come out. . Furthermore, it is necessary to install the drip opening above the lower surface where the drip is to be dripped, and for this reason it is usually necessary to support the injection container with a fixture, which requires a large space above the lower surface where the drip is to be dripped.
There are various problems such as handling and installation methods, including the fact that it may not be possible to provide such a space.

The present invention takes into consideration the above-mentioned problems in these conventional methods, and is simple, safe, reliable, and economical.
Another object of the present invention is to provide a method for injecting a water treatment agent that can effectively suppress and prevent water damage over a long period of time.

[Means for solving problems]

The present inventors have made the present invention as a result of repeated studies on various aspects of the water treatment agent supply (injection) method.

That is, the present invention relates to a water treatment agent injection method characterized in that a chemical solution is supplied through a liquid-permeable injection port equipped with a member having capillary action.

In the present invention, the member having capillary action is a string or band-like material such as a non-woven fabric, a knitted fabric, etc. made of natural fibers, synthetic fibers, or recycled fibers, and the cross section thereof is circular or rectangular (triangular). , square, etc.), any shape that can be used for the purpose of the present invention may be used.

The method of the present invention involves inserting one end of a member having a capillary action into the container (such as a bottle) containing a water treatment agent through the opening thereof, and immersing the other end in the liquid to be treated. The chemical solution is supplied (injected) into the water to be treated little by little through the member.

When the method of the present invention is actually applied, it is necessary to prevent the evaporation of the water or solution of the water treatment agent that rises due to capillary action from the strip or string having capillary action, or to prevent the water treatment agent from evaporating. It is necessary to cover the strip or string-like object with a coating material to prevent dust and dirt from adhering to the surface of the object. Such coating material may be any material as long as it can prevent the evaporation of the water or solution of the water treatment agent that rises due to capillary action; for example, a tube-shaped material such as polyethylene, polypropylene, polyvinyl chloride, etc. is used. .

The rise of liquid due to capillary action or the amount of liquid passing through depends on the material, shape, structure, etc. of the member having capillary action used in the present invention.
It can be adjusted by density, size, etc., and by appropriately combining these to suit the location and purpose of use, the injection speed and amount of the drug solution can be controlled.

When carrying out the method of the present invention, it goes without saying that the positional relationship between the head of the water treatment agent and the heads of cooling water, drain water, etc. should be adjusted to maintain a positional relationship in which the chemical can be injected. However, the method of the present invention does not require a large space unlike the conventional method for installing a drug solution container. Therefore, the method of the present invention is particularly suitable for injecting chemicals into the water in the drain pan of air conditioning equipment where the liquid to be treated is shallow, or when there is no space necessary to install a large chemical container. be.

〔Effect of the invention〕

The method of the present invention does not require a special container or device for injecting a chemical liquid as in the past, nor does it require a large space for installing an injection container. This is a method that can be injected into liquid (water), is simple, safe, and reliable, and is also economical and can effectively suppress and prevent water damage over a long period of time.

Some specific examples of the present invention are shown below by way of Examples, but the present invention is not limited to the following Examples unless the gist of the present invention is exceeded.

Example 1 A member having capillary action was prepared by attaching a cotton string with a circular cross section to a polyethylene tube with a diameter of 3 mm.

Next, put 500ml of the comprehensive water treatment agent Contrimetro 00 (trade name, manufactured by Mitsubishi Gas Chemical Co., Ltd.) into a polyethylene bottle with a capacity of 500mj2, and add one end of the previously prepared string-like member with capillary action to this. A container for injecting a chemical solution to be used in the method of the present invention was prepared by immersing the container into a chemical solution through a hole provided in the lid of the container, and fixing one end of a polyethylene tube as a covering material to the lid.

A cooling tower with a capacity of 10RT1 and a water capacity of 120β.The receiver is fixed by immersing one end of the string-like material that has a capillary action attached to the drug solution injection container prepared above under the water surface of the dish, and the bottom of the injection container is placed in the receiver. The container was placed so that the water level was higher than the water level in the dish.

When the slime adhesion state was observed after two months had passed under this condition, the cooling tower and cooling water were clean with no slime or algae generation. During this time, approximately 300 nl of water treatment agent was injected.

Example 2 A drug solution injection container was prepared in the same manner as in Example 1 except that a container with a capacity of 100 m1 was used.

Cooling capacity 10 horsepower (28000 Kcal/h), dehumidification capacity 141/h1 Drain pan size 0.65 m'
(500 cm x 1300 cm) floor-standing package cooler (manufactured by Mitsubishi Electric Corporation), one end of the string-like material with capillary action attached to the previously prepared drug injection container was immersed in drain water (dehumidified water). The injection container was placed such that the bottom of the injection container was higher than the drain water level in the drain pan. When the test was carried out under this condition and the state of slime adhesion was observed after 3 months, it was found that there was no slime generation or adhesion, and there was no problem of drain water overflowing due to clogging of the drain outlet, and smooth operation continued. During this period, approximately 60 ml of water treatment agent was consumed.

Claims (1)

[Claims] A water treatment agent injection method characterized by supplying a chemical solution through a liquid-permeable injection port equipped with a member having capillary action.