JPH08189217A - Gradual release ph regulator and its usage for swimming pool water using organic chlorine agent - Google Patents

Abstract

PURPOSE: To maintain swimming pool water with an appropriate pH value by making granular MgO having a gradual release property come in contact with pool water using organic chlorine agent representing at least sodium trichloroisocyanuric acid as a disinfectant. CONSTITUTION: A granular or a massive MgO (heavy burned magnesium oxide) showing a gradual release property underwater is made to come in contact with pool water disinfected with an organic chlorine agent by circulation. pH regulation is made by showing the gradual release property by the MgO and CaO and/or Na2 CO3 which are a compound indicating alkaline underwater. Pool water is constantly maintained to a neutral value of pH6 to pH7 by making the MgO contact the pool water when it circulates and gradually release magnesium ion at all times. Thus pool water can be efficiently controlled.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION The present invention uses at least an organic chlorine agent represented by sodium trichloroisocyanurate as a disinfectant by circulating a part of pool water without using an expensive pool water monitoring system. The present invention relates to a sustained release pH adjuster capable of adjusting the pH of pool water and a method of using the same.

[0002]

2. Description of the Related Art For sterilizing and disinfecting pools, there are a method using an inorganic chlorine agent and a method using an organic chlorine agent represented by sodium trichloroisocyanurate or sodium dichloroisocyanurate. The method using a chlorine agent is the mainstream. Looking at the bactericidal action by such an organic chlorine agent, as shown in FIG. 1, the highest bactericidal power is shown in the vicinity of human skin pH of 5, but when the pH is 6 or less, the oxidation rate of iron rapidly increases, It is recommended to adjust the pool water to a neutral to slightly alkaline range of pH 6 to 7 before use. Therefore, p
They are instructed to make H measurements and supply fresh pool water and new organochlorine agents.

[0003]

However, it is extremely difficult to control the pH and the amount of the organic chlorine agent in a normal school pool, and the control is generally left until the swimmer feels an abnormality. Therefore, there is an inconvenience that pool hygiene control is insufficient and children are affected, and pool pipes are corroded and damaged in a short period of time. Of course, a system for automatically performing the above pH control and an appropriate amount of organic chlorine agent replenishment has also been developed, but it is too expensive to newly install in the existing pool and is not in general use.

Therefore, the present invention generally employs a system in which pool water is circulated for purification to filter contaminants, and a pH adjusting agent having a sustained release property, that is, a slow-dissolving property, in this circulation system route. That is, the inventors have invented that the pH control of pool water is automatically carried out appropriately by installing a filling tube filled with a compound showing alkalinity in water and bringing this into contact with circulating water.

However, when the conventionally used anhydrous sodium carbonate is used as the pH adjusting agent, it has no sustained-release property and must be added periodically. In addition, it was found that it also causes the generation of bound chlorine, which lowers the bactericidal power and causes eye irritation. Therefore, granular or lumpy calcium oxide was used as a material showing sustained release over a long period of time, but it was found that the pool water was contaminated by forming scales and residues in the water. It was also found that the pH adjusting ability deteriorates after a certain period of time.

[0006] Therefore, an object of the present invention is to provide a pH adjuster having a sustained release property, which can eliminate the problems of pH adjustment due to the above anhydrous sodium carbonate and calcium oxide.

[0007]

According to the present invention, MgO does not have the above-mentioned defects, and exhibits a sustained release property when it is in the form of granules or agglomerates. By contact with pool circulating water, the pH is automatically adjusted for a suitable period of time. It is a completed pH-adjusting agent for pool water that uses at least an organic chlorine agent typified by sodium trichloroisocyanurate as a sterilizing agent, and is a granular product showing sustained release in pool water. Alternatively, it is a sustained-release pH adjuster for pool water using an organochlorine agent composed of massive MgO.

The pH adjusting agent according to the present invention is preferably composed only of MgO, but can be used in combination with other compounds showing alkalinity in water as long as it does not inhibit the action function of MgO. As a preferable combined use form, a mixed form containing MgO as a main component and CaO and / or Na ₂ CO ₃ as a compound exhibiting alkalinity in water can be mentioned. When using the CaO, lowering of pH adjustment capability after a certain period of time is observed but because recovery of pH adjusting capacity seen by combination of Na ₂ CO _3, preferably used in combination Na ₂ CO _3.

As MgO, light burned and heavy burned magnesium oxide can be used, but it is preferable to use heavy burned magnesium oxide in terms of sustained release and whiteness.

A pH adjusting agent or Mg containing the above MgO
The pH adjusting agent containing O as a main component may be mixed with an organic chlorine agent typified by sodium trichloroisocyanurate and molded into a granular or lump form for use. Further, the pH adjusting agent composed of MgO or the pH adjusting agent containing MgO as a main component can be used simply by mixing with a granular or agglomerate of an organic chlorine agent typified by sodium trichloroisocyanurate. The compounding amount or mixing amount can be easily determined by those skilled in the art by considering the provision of effective chlorine in pool water and the appropriate pH adjusting ability. Pressurized tablet form of sodium trichloroisocyanurate is preferable from the viewpoint of slow solubility.

The pH adjusting agent composed of MgO or the pH adjusting agent containing MgO as a main component may be alternately laminated with an organic chlorine agent typified by sodium trichloroisocyanurate to form a granular or agglomerate. At that time, it is possible to prepare one in which the outermost layer is an organic chlorine agent and one in which the pH adjusting agent is used.

[0012]

By using the pH adjusting agent according to the present invention, when the pool water contains an organic chlorine agent represented by sodium trichloroisocyanurate, the contact with the pool water results in a proportion of the contact amount. Magnesium ions are constantly released. Therefore, the pH of the pool water is automatically adjusted by adjusting the contact amount of the pH adjuster with the circulating pool water according to the amount of the organic chlorine agent used in the pool water.
Is adjusted. For example, if the pH of the pool water accidentally drops, the dissolution rate of the pH adjuster will be slightly faster,
Adjust by adjusting the pool water to an appropriate pH range. Therefore, a granular or lumpy sustained-release pH adjusting agent is filled in a packed pipe or a packed column through which a part of pool water can be circulated so that the pool water can pass, and sodium trichlorisocyanurate is representative. It can be adjusted to an optimum pH range, particularly 6 to 7 (more preferably 6.2 to 6.8) by contacting pool water supplied with an organic chlorine agent, and as long as a pH adjusting agent is present. , Its pH
The adjustment function can be exerted. Therefore, it is possible to perform appropriate sterilization of pool water while saving labor, without replenishing the organic chlorine agent for a long period of time.

Particularly, compared with calcium oxide, the formation of scale and residue is less and the pH adjusting ability is sustained,
It is most suitable as a sustained release pH adjusting agent for pool water.

Further, when the pool water contains an ozone component, the fluctuation of the pH becomes severe. However, by using the pH adjusting agent of the present invention, the pH can be adjusted in a stable manner. Can be used together.

Further, it was said that when an organic chlorine agent is directly mixed with an alkali in a small amount of a container, a rapid chemical reaction is caused to generate a large amount of chlorine gas, but a slow-dissolving organic chlorine agent is also slowly dissolved. This risk does not occur when used in combination with a neutral pH adjusting agent. Therefore, by shaping the adjusting agent used in combination with the organic chlorine agent according to the present invention into a granular or lump form, it is possible to perform appropriate organic chlorine replenishment at the same time as appropriate pH control.

[0016]

The present invention will be described in detail below with reference to specific examples. (Example 1) Heavy-baked magnesium oxide was prepared in the form of granules having a diameter of 3 to 5 mm, and a cylindrical packing tube having a diameter of 10 cm and a length of 90 cm was divided into 1 kg of nylon mesh bags, 2 kg of which were circulated. The circulating water of pool / hour (sodium trichloroisoianurate 3 ppm) was contacted and supplied to about 380 m ³ of pool water. For 10 days, the pool water pH was adjusted to about 6.5 without supplementing with an organic chlorine agent (sodium trichloroisoianurate).
Could be maintained. (Example 2) A cylindrical organochlorine agent dissolver having a diameter of 25 cm and a length of 50 cm filled with 1 kg of sodium trichloroisoianurate tablets (highlight 90G), and heavy-baked magnesium oxide were prepared into granules having a diameter of 3 to 5 mm. Then, a cylindrical pH adjusting agent filling pipe having a diameter of 10 cm and a length of 90 cm, which was filled in 2 kg in 1 kg portions in a nylon mesh bag, was connected back and forth, and pool circulating water (trichloroisolate) with a flow rate of 400 liters / hour was used. Sodium ianaurate (3 ppm) was first passed through an organochlorine agent dissolver, then contacted with a pH adjusting agent-filled tube, and supplied to about 380 m ³ of pool water. For 2 months, the pool water pH was adjusted to about 6.5 without adding and supplementing an organic chlorine agent (sodium trichloroisoianurate).
Could be maintained. (Example 3) Sodium trichloroisoianurate sodium tablets (Highlight 90G) (1 kg) was prepared in the upper part, and heavy-baked magnesium oxide was prepared into granules having a diameter of 3-5 mm. For a cylindrical pH adjusting agent filled tube with a diameter of 10 cm and a length of 80 cm,
Laminated and filled with calcined diatomaceous earth as a buffer, and circulating water of a flow rate of 400 liters / hour (sodium trichloroisoianurate 3 ppm) was first passed through the organochlorine agent layer and then contacted with the pH adjusting agent layer. , About 100 m ³ of pool water. During the 2 months, the pool water pH could be maintained at about 6.5 without supplemental replenishment of the organochlorine agent (sodium trichloroisoianurate). (Comparative Example) Calcium oxide was prepared in the form of granules having a diameter of 3 to 5 mm, and a nylon mesh bag having a diameter of 10 cm and a length of 90 cm was subdivided into 2 kg each in a mesh bag made of nylon. Contact the circulating water of flow rate (sodium trichloroisoianurate 3ppm),
It was supplied to about 380 m ³ of pool water. For the first 2 days, the pH of the pool water could be maintained at about 6.5 without supplementing the organic chlorine agent (sodium trichloroisoianurate), but after 3 days the pH dropped to 6.0. . Therefore, when added to anhydrous sodium carbonate and pool water, the pH
Returned to 6.5 but dropped again to pH 6.0 after 2 days. Also, after 1 week, the presence of scales and residues became noticeable in the pool water.

[Brief description of drawings]

FIG. 1 is a graph showing a correlation between pH of pool water using an organic chlorine agent and bactericidal activity.

─────────────────────────────────────────────────── ─── Continuation of the front page (51) Int.Cl. ⁶ Identification code Internal reference number FI Technical display location C02F 1/50 DH 540 DE E 550 B 1/66 510 G 521 C 530 B 540 G 1/78

Claims (12)

[Claims] 1. A pH adjusting agent for pool water using at least an organic chlorine agent typified by sodium trichloroisocyanurate as a sterilizing agent, which is an organochlorine agent consisting of granular or lumped MgO showing sustained release in pool water. A sustained-release pH adjusting agent for pool water. 2. A pH adjusting agent for pool water using at least an organic chlorine agent typified by sodium trichloroisocyanurate as a disinfectant, which comprises MgO and a compound showing alkalinity in water, and is gradually released in pool water. The sustained-release pH adjusting agent for pool water according to claim 1, which is a granular or lumpy substance exhibiting properties. 3. CaO and / or Na ₂ as a compound containing MgO as a main component and showing alkalinity in water.
The sustained-release pH adjusting agent for pool water according to claim 2, which contains CO ₃ . 4. The sustained-release pH adjusting agent for pool water according to claim 1, wherein the pool water contains an ozone component in addition to an organic chlorine agent typified by sodium trichloroisocyanurate. 5. The sustained-release pH adjusting agent for pool water according to claim 1, wherein MgO is heavy-baked magnesium oxide. 6. A mixture of a pH adjusting agent consisting of MgO or containing MgO as a main component and an organic chlorine agent represented by sodium trichloroisocyanurate, which is formed into a granular or lump form and has a sterilizing and disinfecting property. A sustained-release pool water regulator having a pH adjusting function. 7. A mixture of a granular or agglomerate of a pH adjusting agent consisting of MgO or containing MgO as a main component and a granular or agglomerate of an organic chlorine agent typified by sodium trichloroisocyanurate, which has a sterilizing property. And a sustained-release pool water regulator having an automatic pH adjusting function. 8. A granular or agglomerate obtained by alternately laminating layers of a pH adjusting agent composed of MgO or containing MgO as a main component and layers of an organic chlorine agent represented by sodium trichloroisocyanurate. Sterilization and automatic pH
A sustained-release pool water regulator having a regulating function. 9. The controlled release pool water regulator according to claim 8, wherein the outermost layer is an organic chlorine agent. 10. The sustained-release pool water regulator according to claim 8, wherein the outermost layer is a pH regulator. 11. A granular or lumpy sustained-release pH adjusting agent according to any one of claims 1 to 5, which is installed in a filling pipe or a packed column through which pool water can pass, which is installed in a path in which a part of the pool water can be circulated. The above-mentioned pH of the pool water filled with the organochlorine agent typified by sodium trichloroisocyanurate
A method for supplying a pH adjuster, which is characterized in that the pH adjuster is brought into contact with and distributed. 12. A granular or lumpy sustained-release pool water regulator according to claim 6, which is installed in a passage through which a portion of the pool water can be circulated, and through which the pool water can pass. Fill the tower, contact the circulating pool water,
A method for adjusting pool water, which comprises supplying an organic chlorine agent typified by sodium trichloroisocyanurate and a pH adjusting agent thereof.