JPH0440796Y2 - - Google Patents

Description

[Detailed explanation of the invention] [Industrial application field] This invention injects ozone into the circulating water of baths and backwash water of filtration equipment to sterilize and clarify the circulating water and clean the filtration equipment with high efficiency. Moreover, it concerns something that can be done economically.

[Conventional technology]

FIG. 2 is a flow diagram showing the piping system in a conventional bathhouse. In the diagram, 1 is bath water, 2 is a circulating water volume adjustment valve, 3 is a hair collector, 4 is a circulation pump, 5 is a normal circulation valve, and 6 is a A backwash valve, 7 a backwash drain valve, 8 a filtration device, and 9 an air vent valve automatically discharge the air accumulated in the filtration device 8. 10 is a bath return valve, 1
1 is a heat exchanger that keeps the bath water temperature constant; 12
is a sodium hypochlorite tank, 13 is a sodium hypochlorite injection pump, 14 is a polymer flocculant tank, 1
5 is a polymer flocculant injection pump, 16 is a solid chlorine injection tank, 17 is a backwash water supply pipe, 18 is a water supply valve, 19 is a backwash water storage tank, and 20 is a backwash supply valve.

Next, the operation will be explained. Arrow A for bath water 1
clarified by the circulatory system. In other words, valves 2, 5,
10 is open, valves 6, 7, and 20 are closed, circulation pump 4,
The chemical injection pumps 13 and 14 are in operation. Therefore, the bath water 1 is injected with sodium hypochlorite 12 and a polymer flocculant 14, and sterilized with hypochlorous acid.
A polymer flocculant turns fine pollutants in bath water into coarse flocs. The bath water 1 into which the drugs 12 and 14 have been injected is used to remove hair mixed in the bath water 1 by a hair collector 3, and then circulated by a circulation pump 4. The bath water 1 sent by the circulation pump 4 is
If the degree of pollution is high, add solid chlorine to the tank 16.
More solid chlorine is added and mixed into the bath water 1, and the amount of the chemical is increased. The bath water 1, which has been sterilized and made into coarse flocs by the above-mentioned chemicals, enters the filtering device 8 from the upper part, and the pollutants which have been turned into coarse flocs are captured by the filtering medium of the filtering device 8. Filtration device 8
A portion of the air mixed in the air is automatically discharged by the air vent valve 9 when a certain amount of air is reached. Next, the bath water 1 from which pollutants have been removed by the filtration device 8 passes through the bath return valve 10, is heated to an appropriate temperature by a heat exchanger 11, and is sent to the bath.

Next, if the permissible amount of contaminants is captured by the filter medium of the filtration device 8, the effectiveness of the filtration device will be lost, so the contaminants captured at this stage must be discharged from the system. In other words, since the filtration device requires backwashing of the system shown by arrow B, this example will be explained.
For example, tap water is connected to the backwash water supply pipe 17, the water supply valve 18 is opened, and the water is stored in the backwash water storage tank 19. The status of the system valves during backwashing is as follows: valves 20, 6, and 7 are open, valves 2, 5, and 10 are closed, and circulation pump 4 is in operation.
The drug pumps 13 and 15 are in a stopped state. In other words, the water in the backwash storage tank passes through the backwash valve 20 and is blown up from the bottom of the filtration device 8 through the valve 6 by the circulation pump 4, and the pollutants captured by the filter media in the filtration device 8 are removed from the backwash water. The liquid is discharged as drain through the push-out valve 7 to the outside of the system.

[Problem that the invention attempts to solve]

The bath water treatment equipment that has a conventional filtration device and is used for circulation is configured as described above, so that it uses chemicals such as sodium hypochlorite and polymer flocculants to increase the amount of chemicals used in cases of high pollution. Because solid chlorine agents are required in large quantities, the smell of chlorine in bathhouses, for example, is strong, which not only makes people feel uncomfortable, but also corrodes metals and causes plants to wither. In addition, it is necessary to constantly inject disinfectant, but liquid sodium hypochlorite has problems such as crystals of sodium hypochlorite forming in the injection system, which may prevent injection. In addition, since the filter media of filtration devices is generally made up of layers of small-diameter sandy materials, microorganisms often breed, and if these microorganisms grow in the filter media, for example, backwashing with tap water alone will not work. There were problems such as the filter media could not be completely removed and the filter media could not be recovered, and in rare cases, the water leaked out and was sent to the bathhouse.

This idea was made to solve the above problems, and it greatly reduces or eliminates the need for chemicals, removes microorganisms that have grown in the filter media, and reduces the number of times the filtration device is backwashed or the amount of backwash water. The purpose of the present invention is to provide a water treatment device for circulating water in a bathhouse, which can greatly reduce the amount of circulating water, completely recover the filter medium, and greatly improve the quality of the bathwater and the atmosphere of the bathhouse.

[Means for solving problems]

The ozone water treatment device for circulating bath water according to this invention aims to improve water quality by reacting and absorbing ozone into circulating bath water, drastically reducing or eliminating the use of chemicals, and also uses ozone water for backwashing the filter media of the filtration device. Microorganisms generated inside the filter medium and captured pollutants can be efficiently removed using fine ozonized gas.

[Effect]

The ozone water treatment device for bath circulating water in this invention is equipped with an ejector in the circulating or washing water circuit, and the circulating water and ozone are reacted to improve water quality such as sterilization. Ozonated water and fine forward reaction ozonized gas are blown into the filter to kill microorganisms generated inside the filter medium, and the levitation force of the fine ozonized gas can remove pollutants between the filter medium layers to the outside of the system, cleaning the filter medium. Efficiently possible.

[Example of idea]

An embodiment of this invention will be described below with reference to the drawings. In FIG. 1, reference numeral 21 denotes an ejector, which mixes suction gas into fine bubbles when water is passed through it at a high flow rate. 22 is an ozone generator that generates ozone from air or oxygen. 23 is an ozone supply valve, and 24 is a check valve, which is provided to prevent backflow to the ozone generator.

Next, the operation will be explained. Arrow A for bath water 1
Cleaned by the circulatory system. In other words, valves 2, 5,
10 and 23 are open, the circulation pump 4 and the ozone generator 22 are in operation, that is, the bath water 1 passes through the valve 2, the hair collector 3, the circulation pump 4, the ejector 21, and the filtration device 8, and is then heat exchanged from the valve 10. It is heated in the vessel 11 and returned to the bathhouse, but at this time the ejector 2
The ozonized gas generated by the ozone generator 22 is sucked into the suction part 1 and is injected into the ejector 21 via the valve 23 and the chatch valve 24, where the ozonized gas is made into fine bubbles and mixed with the circulating water. Water quality is improved by sterilization and decomposition of organic matter using ozone, which is said to have an oxidizing power several times to several thousand times that of sodium hypochlorite.The water enters the filtration device 8, and suspended solids are captured in the filter layer. The water is sterilized, decolorized, and deodorized by ozone, resulting in clean water that is returned to the bathhouse.

On the other hand, the suspended solids trapped in the filter medium of the filtration device 8 are discharged out of the system through the system indicated by arrow B. In other words, the backwash water in the storage tank 19 is
Valve 20, circulation pump 4, ejector 21, valve 6
It enters the lower part of the filtration device. As described above, the entire amount of ozone gas supplied by the ozone generator 22 is mixed with backwash water by the ejector 21, and most of the ozone gas is converted into ozone water, with fine bubbles being finely mixed in the entire amount. The backwash water in the above state enters from the bottom of the filter device 8 and washes the filter medium from the bottom to the top.
At this time, ozonated water contains substances trapped between the filter media layers.
Furthermore, microorganisms generated within the filter medium are sterilized and discharged to the top. However, a large amount of washing water is required to discharge trapped substances using only washing water, but in this process, fine air and unreacted ozone gas bubbles are generated in the filter media layer, sterilizing microorganisms, and removing air. Because the floating force of the filter is accelerated, the filter medium can be efficiently cleaned with a much smaller amount of water compared to the amount of cleaning water using only cleaning water.

In the above embodiment, valves were installed in the system for circulating water and cleaning the filtration device;
It is sufficient if the filtration device is configured to be washable.
The valve may also be a manual valve or an automatic valve.
Furthermore, in order to leave a specified amount of residual chlorine in the bathhouse, a solid chlorine injection tank was provided, but this tank may be used as long as it injects a specified amount, and may not be necessary if there are no regulations regarding residual chlorine. In addition, although tap water is used for cleaning the filtration device and a storage tank is provided, other water may be used and the storage tank may not be necessary as long as a sufficient amount of water is supplied. Further, although the ozone gas injection point was provided on the discharge side of the circulation pump in the above embodiment, it may be on the suction side. Furthermore, even if bath water is used as the washing water, the same effect as in the above embodiment can be obtained.

[Effect of idea]

As described above, according to this invention, ozone is injected into the bath circulating water treatment device using the circulating water ejector on the circulation pump discharge side to improve water quality, so the amount of chemicals used other than ozone is eliminated or greatly reduced. As a result, the chlorine concentration in the bathhouse can be reduced to zero or to a large extent. Therefore, the corrosion of the metal used in the building and the atmosphere can be greatly improved, resulting in a pleasant bathhouse. In addition, cleaning the filter media with ozonated water and cleaning water mixed with fine ozonized gas bubbles is economical because it can restore cleanliness with a small amount, and it also sterilizes microorganisms inside the filter media, resulting in extremely hygienic bath water. There are benefits to be gained.

[Brief explanation of the drawing]

FIG. 1 is a flowchart of a piping system showing an ozone water treatment device for circulating water in a bathhouse according to this invention, and FIG. 2 is a flowchart of a piping system showing a conventional circulating water treatment device for a bathhouse. 21 is an ejector, 22 is an ozone generator,
23 is an ozone supply valve, and 24 is a check valve. In addition,
In the figures, the same reference numerals indicate the same or corresponding parts.

Claims (1)

[Scope of utility model registration request] In baths equipped with filtration devices and drugs such as sodium hypochlorite injection devices, and in baths that sterilize and clarify circulating water in baths using the above drugs and filtration devices, an ejector is placed on the discharge side of the circulation pump, and an ozone generator is used to The obtained ozone is sterilized and clarified by sand filtration, and ozone is injected into the backwash water of the filter media of the filtration device through the above ejector, so that the filter media can be washed in a state containing ozonated water and fine ozonized air. A bath water treatment device characterized by: