JPH1119655A - Method for sterilizing bath water - Google Patents

Abstract

PROBLEM TO BE SOLVED: To sterilize the harmful bacteria in bath water by providing a bathtub, circulating pump, purifying tank and circulating route, constituting a state of preventing the intermittent inflow of the bath water into this purifying tank or preventing the passage thereof through the purifying tank and injecting chlorine in this state to circulate the chlorine. SOLUTION: The bath water in the bathtub 1 is fed by the circulating tank 2 into the purifying tank 2 and after the pollutants in the bath water are filtered and purified, the bath water is passed through a sterilized water inflow pipe 3 into a sterilizing tank 4 where the water is sterilized. When the amt. of the pollutants integrated in the purifying tank 11 and the propagated useful microorganisms becomes excessive, the bath water is returned through a motor operated three-way valve to the purifying tank 11 by a bypass line 8 in common use as a backwashing pipe. The contaminants and the propagated useful microorganisms are released from a drain pipe 12 through a motor operated three-way valve 9. At this time, the state of preventing the intermittent inflow of the bath water into the purifying tank 11 is attained and in this state the chlorine is injected into the bath water circulating device by a chlorine agent injecting device 13 to circulate the chlorine, by which the harmful bacteria of the bath water are sterilized.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

The present invention relates to a method for coagulating and filtering fine pollutants contained in bath water, disinfecting bacteria,
The present invention relates to a method of sterilizing bath water of a bath water purifying device for maintaining the quality of bath water satisfactorily for a long period of time such as continuous operation for more than an hour.

[0002]

2. Description of the Related Art In many cases, filtration of bath water is performed by a rapid filtration method. In this case, a filtration method using a cartridge filter is also known. Also, 3-5m inside
There is also known a method of coagulating and filtering using a purification tank provided with a filter medium layer filled with a filter medium such as m.

[0003] As a method of sterilizing bath water, ultraviolet rays and ozone are used. When using ozone, ozone is often directly injected into a bathtub. Known examples of an ozone reactor include a water purification plant, a sewage treatment plant, a pool purification device, and the like, in addition to a bathroom. A method of using a chlorinating agent such as sodium hypochlorite for disinfection of water is also commonly used in water purification plants, sewage treatment plants, pool purification devices and the like. In addition, in order to simultaneously perform coagulation / filtration and sterilization of bath water, a bath tub, a circulating pump that absorbs and supplies the bath water, a purification tank that coagulates / filters fine pollutants contained in the bath water, and an ozone pump are provided. 2. Description of the Related Art There is known a bath water circulation purifying apparatus including a disinfection tank provided with a supply ozonizer and an ejector, and a circulation path.

[0004] However, the above-mentioned conventional method has many problems as described below. That is, the rapid filtration method requires a pretreatment for floc formation, such as adding a flocculant such as a sulfuric acid band and a flocculant such as polyaluminum chloride in order to efficiently remove fine dirt in water. In addition, the processing steps become complicated. Also,
When a cartridge filter is used together, the filter needs to be replaced, and it is difficult to continuously operate for a long time.

[0005] In the method using ultraviolet rays, sterilization is mainly performed, and a floc forming effect cannot be expected so much. In the method using ozone, when ozone is directly injected into the bathtub, undissolved ozone accumulates in the bathroom, and 0.1 ppm
There are concerns about exceeding the following environmental standards. When injecting ozone into the apparatus, the apparatus becomes large and complicated to increase the reaction efficiency of ozone.

In order to simultaneously perform coagulation / filtration and sterilization of bath water, a bath tub, a circulating pump for absorbing and sending the bath water, a purification tank for coagulating / filtering fine pollutants contained in the bath water, and an ozone There is known a bath water circulation purifying apparatus including an ozonizer for supplying water, a sterilization tank provided with an ejector, and a circulation path. The method for simultaneous coagulation / filtration and sterilization using this device uses a sterilization tank equipped with an ozonizer and ejector, so the number of devices in the device is large, operation and maintenance are complicated, and the price of the device can be high. However, if this apparatus is used properly, coagulation / filtration and sterilization can be performed very efficiently at the same time, and there is no particular problem.

However, for this reason, a sterilization tank equipped with an ozonizer and an ejector is excluded from this apparatus.
Alternatively, with such a sterilizing tank, sterilizing bath water using a chlorinating agent that can be easily used, and using a purification tank to coagulate and filter fine pollutants, sterilization and coagulation / filtration Can be performed simultaneously. By the way, the purification tank is provided with a filter medium layer filled with a filter medium of 3 to 5 mm such as barley stone, and this filter medium layer contains human dirt, sweat, etc. contained in bath water generated by a bather. Are filtered and deposited. The organic matter is decomposed and absorbed by the aerobic bacteria, anaerobic bacteria, or protozoa in the filter medium layer, and the aggregation and filtration of fine pollutants proceed. The purification tank plays an important role in such coagulation and filtration. However, if a chlorine agent is used for sterilizing bath water, bacteria outside the purification tank are disinfected (sterilized), and at the same time, useful microorganisms in the purification tank are used. A new problem arises in that even the aerobic and anaerobic bacteria are sterilized.

[0008]

The present invention has been made to solve such a problem. That is, an object of the present invention is to inject a chlorinating agent into a bath water circulation / purification device including a bath tub, a purification tank, etc. while sufficiently utilizing the coagulation / filtration function of the purification tank without harming useful microorganisms in the purification tank. Another object of the present invention is to provide a method of sterilizing bath water for sterilizing harmful bacteria in the bath water.

[0009]

According to the present invention, such an object is suitably achieved by the following method of the present invention. That is, the gist of the present invention is as follows: (1) In a bath water circulation / purification apparatus having at least a bathtub, a circulation pump, a purification tank, and a circulation path, intermittently preventing inflow of the bathwater into the purification tank or passage through the purification tank. State, and in this state inject chlorine into the device, a method of sterilizing bath water in the device, characterized by circulating chlorine,

(2) A state in which bath water is prevented from flowing into or passing through the purification tank once every 8 hours to 10 days for 0.5 hour or more each time. The method for sterilizing bath water according to the above (1), wherein chlorine is injected and chlorine is circulated;

(3) The bath water is prevented from flowing into or passing through the purification tank once every 8 to 10 days for 0.5 hour or more at a time. The method for sterilizing bath water according to the above (1), wherein chlorine is injected into the device so that the residual free chlorine concentration becomes 0.2 ppm or more, and the chlorine is circulated.

Further, the preferred method of implementing the above (1) is as follows: (4) The bath water flows into the purifying tank or in the purifying tank at least once every 40 minutes to less than 8 hours and at least 0.5 hour at a time. The method for sterilizing bath water according to the above (1), wherein chlorine is injected into the apparatus so that the concentration of free chlorine remaining in the bath water becomes 0.2 ppm or more in this state, and chlorine is circulated in this state. , And the like.

[0013]

BEST MODE FOR CARRYING OUT THE INVENTION In the above (1), a preferred embodiment is as described in the above (2), and an even more preferred embodiment is as described in the above (3). Here, the meaning of preventing the bath water from flowing into the purifying tank or passing through the purifying tank once every 8 to 10 days for 0.5 hour or more means, for example, once a day. If the time is two hours, chlorine is injected once a day for two hours to prevent the inflow and passage of bath water to the purification tank, and the remaining twenty-two hours will be inflow and passage of bath water to the purification tank. It means that it is possible and that chlorine is not injected.

If the frequency of preventing the inflow and passage into the purification tank is less than once every 8 hours, the period during which the purification tank is closed becomes relatively long, though depending on the time of one execution, so that purification is performed. The function of coagulation and filtration of the tank may not be fully utilized. If the frequency is once every 10 days or more, depending on the time of one operation or the residual free chlorine concentration, sterilization of the bath water is not sufficient, and bacteria harmful to humans accumulate in the bath water. May be. The concentration of residual free chlorine in a state where the bath water is prevented from flowing into the purification tank or passing through the purification tank is preferably 0.2 ppm or more. If the residual free chlorine concentration is less than 0.1 ppm, the bactericidal effect on the bath water may not be sufficient, depending on the time for preventing the inflow and passage of the bath water into the purification tank, and resistant bacteria may be generated. there is a possibility. Residual free chlorine concentration is 0.5pp
If the concentration exceeds m, the concentration of free chlorine remaining is high, which may have a bad effect on the useful microorganisms in the purification tank when the inflow and passage of bath water into the purification tank are started. Injection of chlorine into the bath water circulation purification device is performed using sodium hypochlorite,
A chlorine agent such as sodium dichloroisocyanurate and trichloroisocyanuric acid is used by using a usual injection means.

In the present invention, a circulating pump for absorbing bath water and supplying the bath water to a purification tank, a purification tank for purifying the bath water supplied from the circulation pump, and a circulation circulation bath having a circulation path. Use the device. The bath water circulation purification device used by the present invention further includes a sterilization tank provided with a gas-liquid separation partition on the water suction side or the discharge side of the purification tank, and the ozone supplied from the ozonizer is supplied to a suction side line of the sterilization tank. Ejectors to inject, or bath water circulation purifiers with compressors can be used. When the sterilization with ozone using such a sterilization tank is used in combination with the sterilization with chlorine of the present invention, the bath water circulation purification device can be operated extremely flexibly and the sterilization efficiency can be increased. Disinfection is not necessarily required.

Hereinafter, the present invention will be described in detail with reference to the accompanying drawings. FIG. 1 is a flow sheet of a bath water circulation purifying apparatus for showing one embodiment of the method of the present invention.

In FIG. 1, reference numeral 2 denotes a circulation pump, and a bath water suction pipe 1 is provided on the water suction side of the circulation pump 2, and a water inlet pipe to a purification tank 11 is provided on the discharge side of the circulation pump 2. I have. This water inlet pipe flows into A above the purification tank 11. The bath water discharge pipe 7 returning to the bathtub via the sterilizer is connected to B at the lower part of the purification tank 11. Purification tank 1
The inside of 1 is provided with a filtering material. Further, between the water inlet pipe to the purification tank 11 and the bath water discharge pipe 7, a backwash pipe is provided so that the backwash of the purification tank 11 can be performed, and electric three-way valves 9 and 10 are provided. .

The backwash pipe also serves as a bypass line, and is used by the operation of the electric three-way valves 9 and 10 when "preventing bath water from flowing into the purification tank or passing through the purification tank" in the method of the present invention. Bath water flows into the purification tank 11,
Without passing through, it flows through the backwashing / bypass line 8, passes through the sterilizing water inlet pipe 3, and circulates to the bathtub. Reference numeral 12 denotes a drain pipe for back washing the purification tank 11.

A sterilization water inlet pipe 3 is provided from the bath water discharge pipe 7 to the sterilization tank 4. The sterilization water inlet pipe 3 is provided with a flange type ejector 5. Ozone gas flows in. The bath water is sucked in from the A side of the ejector 5 and discharged to the B side of the ejector 5. The sterilization tank 4 is A and the sterilization water pipe 3
, And B to the bath water discharge pipe 7. The tank bottom of the sterilization tank 4 has a structure having gas-liquid separation.

In this bath water circulation purifying apparatus, bath water is first introduced into a circulation pump 2 from a bath water suction pipe 1. The bath water pressurized by the circulation pump 2 is sent to the purification tank 11, and while the bath water flows from above to below through the filter material filled in the purification tank 11, the contamination of the bath water is filtered and purified. You. While the filtration and purification of the bath water contamination is continued, the contaminants collected by the filter medium in the purification tank 11 are decomposed by the useful microorganisms in the purification tank 11. If the amount of contaminants accumulated in the purification tank 11 and the amount of propagated useful microorganisms becomes excessive due to the long-time operation of the bath water circulation purification device, the contaminants and propagation will remain, leaving some of the useful microorganisms for subsequent filtration and purification. The useful microorganisms thus obtained are back-washed and taken out. That is, the electric three-way valves 9 and 10 operate in conjunction with each other, and the bath water flows from the backwash pipe / bypass line 8 through the electric three-way valve 10 to the purification tank 1.
1 flows upward from below, and is discharged from the drainage pipe 12 through the electric three-way valve 9 to the outside of the system.

The bath water filtered and purified in the purification tank 11 flows through the sterilization inlet pipe 3 to the sterilization tank 4. Ozone supplied from the ozonizer 6 is dissolved in the bath water of the sterilization tank 4 as countless small bubbles through the ejector 5. The bath water sterilized in the sterilization tank 4 returns to the bath tub after replenishing the heat radiation during circulation by a heater (not shown).

In the present embodiment, an example of a downflow filtration tank is shown as the purification tank 11, but the combination of filtration tanks is not limited to this, and for example, an upflow filtration tank or a multi-layer filtration tank may be used. can do.

In this bath water circulation purification apparatus, since an ejector for ozone injection and a sterilization tank are provided, decolorization, deodorization and sterilization of the bath water are performed, and at the same time, when the sterilization tank is on the water absorption side of the purification tank, especially in the bath water. Coagulated flocs of the fine pollutants, and the filtration efficiency in the purification tank is greatly improved. In addition, ozone is introduced as fine bubbles into the piping by an ejector, and is treated efficiently by gas-liquid reaction with bath water in a sterilization tank having a gas-liquid separation partition at the bottom of the tank in a uniform and countercurrent manner. it can.

However, in this apparatus, since the chlorinating agent injection device 13 is installed at the same time as the sterilizing tank, the chlorine sterilizing method of the present invention can be used as needed. The method of the present invention in which a chlorinating agent is injected and sterilized with chlorine has an advantage that sterilization of the wall of the bathtub and the wall of the circulation path (piping) can be expected as compared with ozone sterilization using a sterilization tank or the like.

[0025]

According to the method for sterilizing bath water of the present invention, in a bath water circulation purifier having at least a bathtub, a circulation pump, a purification tank, and a circulation path, the bathwater is intermittently flowed into the purification tank or in the purification tank. In this state, chlorine is injected into the device and chlorine is circulated, so that useful microorganisms in the purification tank are not adversely affected by the chlorine, and filtration and purification of the purification tank are performed. Does not impair the function.

Further, a sterilization effect equivalent to or higher than that of other sterilization methods requiring a special sterilization device such as a sterilization tank can be obtained. Furthermore, since the number of devices of the bath water circulation purification device can be reduced without requiring a special sterilization device such as a sterilization tank, the cost of the device can be reduced by using the method of the present invention, and the operation of the device can be reduced. Maintenance is also easy.

[Brief description of the drawings]

FIG. 1 is a flow sheet of an apparatus for purifying and circulating bath water to show one embodiment of the method of the present invention.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Bath water suction pipe 2 Circulation pump 3 Sterilization inlet pipe 4 Sterilization tank 5 Ejector 6 Ozonizer 7 Bath water discharge pipe 8 Backwash pipe and bypass line 9 Electric three-way valve 10 Electric three-way valve 11 Purification tank 12 Drain pipe 13 Drain pipe 13 Chlorine injection device

──────────────────────────────────────────────────の Continued on the front page (51) Int.Cl. ⁶ Identification code FI C02F 1/50 550 C02F 1/50 550H 550L 560 560H 560Z A47K 3/00 A47K 3/00 K B01D 35/027 C02F 1/76 A C02F 1/76 3/06 ZAB 3/06 ZAB B01D 35/02 J

Claims (3)

[Claims] 1. A bath water circulation / purification apparatus having at least a bathtub, a circulation pump, a purification tank, and a circulation path, in a state where intermittent inflow of bathwater into the purification tank or passage through the purification tank is prevented. A method for disinfecting bath water in the device, wherein chlorine is injected into the device and chlorine is circulated. 2. 1 hour, once every 8 hours to 10 days
A method for preventing the inflow of bath water into the purifying tank or the passage through the purifying tank for at least 0.5 hour, and injecting chlorine into the apparatus and circulating chlorine in this state.
The method for sterilizing bath water according to the above. 3. Once every 8 hours to 10 days,
At least 0.5 hour per time, the bath water is prevented from flowing into the purification tank or passing through the purification tank, and in this state, the apparatus is controlled so that the residual free chlorine concentration in the bath water becomes 0.2 ppm or more. The method for sterilizing bath water according to claim 1, wherein chlorine is injected and chlorine is circulated.