JPH10235368A - Disinfection of circulating type bath water - Google Patents

Abstract

PROBLEM TO BE SOLVED: To supply efficiently safely a chemical which emits active chlorine or active bromine to bath water in a circulating type bath. SOLUTION: In a circulating type bath, a circulating route 5 in which water in a bathtub 1 is taken out with a circulating pump 2, filtered, heated, and refluxed is provided, a portion of bath water in the circulating route is taken out, introduced to a chemical dissolves 8 in which a solid halogenated chemical is filled, the bath water is brought into contact with the solid haloganated chemical in the chemical dissolves 8 to dissolved the halogenated chemical, and the bath water containing the eluted halogenated chemical is refluxed to the bathtub 1.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method for purifying circulating bath water, and efficiently and safely supplies an agent capable of releasing active chlorine or active bromine to the bath water.

[0002]

2. Description of the Related Art A circulating bath is provided with a circulating path for taking out water in a bathtub with a circulating pump, filtering, heating and refluxing the bath, removing the foreign matter and germs in the bath water, and keeping the bath water at around 40 ° C. It is maintained at a temperature and can be used for bathing at any time, and since it can be used without replacing water for a long time, it has rapidly spread in recent years. Conventionally known disinfection of circulating bath water is performed by the ozone purification method, ultraviolet irradiation method, etc., but these methods do not provide a sufficient bactericidal effect, and general bacteria grow to increase sanitation. A problem has arisen, especially the presence of Legionella spp.
Preventive measures against Legionella infection are urgently needed. As a method for purifying bath water using an active halogenating agent, Japanese Patent Publication No. 62-3803 discloses an effervescent fast-dissolving tablet containing an alkali metal dichloroisocyanurate as an active ingredient. The method involves administration of an active halogenated drug, which is not only troublesome to handle, but also has a disadvantage that the concentration of the active halogen is increased after the addition, resulting in an unpleasant odor.

[0003]

The circulating bath has the advantage that bath cleaning is less frequent and water can be saved, but it is in an environment where germs tend to multiply due to accumulation of dirt, making it more effective. Sterilization must be performed. The present invention relates to a method for purifying circulating bath water, and is intended to efficiently and safely supply an agent that releases active chlorine or active bromine to bath water.

[0004]

Means for Solving the Problems The present inventors have found that in a circulating bath provided with a circulating path through which water in a bathtub is taken out by a circulating pump, filtered, heated and refluxed, one of bath water in the circulating path is provided. Take out the part and lead it to the medicine dissolver filled with solid halogenated medicine, contact the bath water with the solid halogenated medicine in the medicine dissolver to dissolve the halogenated medicine and remove the bath water containing the eluted halogenated medicine. It has been found that the intended purpose can be achieved by refluxing in the bathtub, and the present invention has been completed.

[0005]

DESCRIPTION OF THE PREFERRED EMBODIMENTS In carrying out the method of the present invention,
The water in the bathtub 1 is taken out by the circulation pump 2, filtered through the filter 3, and the filtrate is heated by the heater 4 and heated in the circulation bath 5 provided with a circulation path 5 for reflux.
Bath water is diverted between the circulation pump 2 and the filter 3 in the circulation path, and a control valve 7 is provided in a water pipe 6 leading to the chemical dissolver 8 to control the amount of water distribution, and the bath water containing the eluted halogenated drug is provided. Is combined with the heated bath water and refluxed to the bathtub 1. The control valve 7 is preferably of the electromagnetic opening and closing type.
When this is used, the operation time is determined in advance in accordance with the condition of bath water contamination, and water can be automatically passed to the chemical dissolver 8 by a timer set, so that the bath water can be accurately detected. Active halogen concentration can be controlled.

The solid halogenated chemical used in the method of the present invention is a compound which generates active chlorine or active bromine in water and has a solubility of 3 g or less in 100 g of water at 25 ° C., which is formed by tableting. As a solid halogenating agent, trichloroisocyanuric acid (solubility 1.
8g), dichloroisocyanuric acid (solubility 0.8g),
1-bromo-3-chloro-5,5-dimethylhydantoin (solubility 0.54 g), 1,3-dichloro-5,5-
Dimethylhydantoin (solubility 0.43 g), etc.
These are used alone or in combination of two or more. When these are tableted, known binders, excipients, lubricants and the like can be blended. Tablet molding of a solid halogenated drug may be performed by applying a surface pressure of 500 to 1500 kg / cm ² , usually in units of 10 g to 100 g. The concentration of the halogenated agent to be brought into contact with the dirty bath water is, in accordance with the degree, in terms of active halogen concentration of 0.1.
1 to 10.0 mg / L, preferably 0.3 to 3.0 mg
/ L should be dissolved.

FIG. 2 shows an example of a chemical dissolver suitable for carrying out the present invention. A water supply port 9 connected to a water pipe 6 is provided on one side slightly above the lower part of the cylindrical main body. The solid halogenated medicine tablets 12 are arranged in a multi-stage manner with a discharge port 10 provided at the bottom and a carrier 11 made of a water-permeable nonwoven fabric and a sawboard interposed at the bottom.

[0008]

EXAMPLES Hereinafter, the present invention will be described with reference to Examples and Reference Examples.
This will be specifically described. Example 1 In the circulation type bath apparatus shown in FIG. 1, 2 kg of princess sand and 7 kg of granular zeolite were charged into a filter 3 and a heater 3 equipped with a heater which was turned on and off at a temperature of 40 to 42 ° C. Is disposed, and the diameter of the drug dissolver 8 is 30 mm.
Cylindrical tablets 12 of 20 g of trichloroisocyanuric acid (active chlorine content: 90%, tableting pressure: 1200 kg / cm ² ) are arranged in a multi-stage manner, and 200 L of hot water at about 40 ° C. is put into bathtub 1 and circulated. The pump 2 was operated to circulate bath water in the circulation path 5 at a rate of 900 L / hr. Five people take a bath in the bathtub within 5 hours every day. Immediately after the bathing is completed, the electromagnetic open / close control valve 7 is opened for 5 minutes, and 1 L of water is passed through the water separation pipe 6 to the chemical dissolver 8 to dissolve the bath. The water containing trichloroisocyanuric acid thus obtained was combined with the heated circulating water and refluxed to the bathtub. Thereafter, the control valve 7 is closed for 30 minutes, and then opened again for 5 minutes. During this time, 1 L of water is passed through the water separation pipe 6 to the drug dissolver 8, and the water containing the dissolved trichloroisocyanuric acid is returned to the bathtub. Was. Such an operation was repeated for three days, and the active chlorine concentration of the water in the bathtub during that period was measured by the DPD method (colorimetric method). The results are as shown in Table 1.

[0009]

[Table 1]

After a lapse of three days, the weight loss of the trichloroisocyanuric acid tablet in the drug dissolver was measured and found to be 1.4 g. By these tests, a predetermined amount of active chlorine required for bath water disinfection can be uniformly supplied into the bathtub within a very short time after the end of bathing, and the active chlorine agent gradually dissolves at that time. As a result, no abnormal increase in the active chlorine concentration was observed, and it was found that the administration of the drug could be handled extremely safely.

[Example 2] In Example 1, instead of the trichloroisocyanuric acid tablet, a diameter of 30 mm and a weight of 2 were used.
The test was repeated in exactly the same manner except that 0 g of 1-bromo-3-chloro-5,5-dimethylhydantoin [active halogen content (in terms of chlorine) 62%, tableting pressure 1000 kg / cm ² ) was used. The active halogen concentration of water in the bathtub during that time was measured by the DPD method (colorimetric method), and the results are as shown in Table 2.

[0012]

[Table 2]

After 3 days, 1- in the drug dissolver
The weight loss of the bromo-3-chloro-5,5-dimethylhydantoin tablet was measured to be 1.9 g, similar to the case of the trichloroisocyanuric acid tablet. It was recognized that the required predetermined amount of active chlorine could be uniformly supplied into the bath, and the administration of the drug could be handled extremely safely.

Reference Example Legionella pneumophila EY
The 3465 strain was cultured on BCYEα agar medium to form a suspension,
A solid halogenating agent is added to this with an active halogen concentration of 0.5 m.
g / L, contacted and mixed, applied to a BCYEα agar medium, cultured at 37 ° C. for 4 days, and the bactericidal effect of this drug on Legionella was determined. Table 3 shows the obtained results.

[0015]

[Table 3]

[0016]

According to the present invention, it is possible to efficiently and extremely safely supply the active halogen-releasing agent to the circulating bath water in a short period of time. , A bactericidal effect is exhibited by the treatment, and it is recognized that it is useful for preventing infectious diseases such as Legionella.

[Brief description of the drawings]

FIG. 1 is a system diagram of a circulation type bath apparatus suitable for carrying out the method of the present invention.

FIG. 2 is an elevational view of the circulation type bath apparatus according to the present invention, showing a part of the medicine dissolver which is not shown;

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Bathtub 2 Circulation pump 3 Filtration machine 4 Heater 5 Circulation path 6 Water pipe 7 Control valve 8 Drug dissolver 12 Tablet (solid halogenated drug)

──────────────────────────────────────────────────の Continuation of the front page (51) Int.Cl. ⁶ Identification code FI C02F 1/50 560 C02F 1/50 560A 560Z A47K 3/00 A47K 3/00 K B01D 35/027 C02F 1/76 A C02F 1 / 76 B01D 35/02 J F24H 1/00 302 F24H 1/00 602L

Claims (3)

[Claims] 1. In a circulating bath provided with a circulating path for taking out water in a bathtub with a circulating pump, filtering, heating and refluxing, a part of bath water in the circulating path is taken out and filled with a solid halogenated agent. Circulation characterized by dissolving the halogenated drug by contacting the solid halogenated drug in the drug dissolver with bath water to dissolve the halogenated drug and returning the bath water containing the eluted halogenated drug to the bathtub How to disinfect bath water. 2. A bath water which divides bath water between a circulation pump and a filter in a circulation path, controls a water distribution amount by providing a control valve in a water pipe leading to a chemical dissolver, and contains an eluted halogenated chemical. The method for disinfecting circulating bath water according to claim 1, wherein the water is mixed with heated bath water and refluxed to a bathtub. 3. A circulating bath water according to claim 1, wherein a solid halogenated agent which forms active chlorine or active bromine in water and has a solubility of 3 g or less in 100 g of water at 25 ° C. is tablet-formed. Disinfection method.