JPH0725995U - Advanced water treatment equipment - Google Patents

Abstract

(57) [Summary] [Purpose] The sterilization effect is obtained and the life of activated carbon is extended by an inexpensive and simple structure. [Structure] This device is a device for injecting ozone generated by an ozone generator 1 into circulating water and then treating the circulating water by passing the circulating water through a filtering device 2 having an activated carbon filter layer 2a. A heater 3 for heating into hot water, a conduit 4 for passing the heated water through the activated carbon filtration layer from a direction opposite to the direction of circulating water, and an elevated water tank 5, for circulating the water therein. The pump 6, the three-way switching solenoid valve 7, the opening / closing solenoid valves 8, 9, 10, the temperature sensor 11, the circulation clean piping system, the backwash piping system and the like are provided. [Effect] By combining the advanced water treatment including ozone treatment and backwashing with hot water, the ultraviolet sterilizer is not required, the life of activated carbon is extended, and the economical efficiency of the advanced water treatment device is improved.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 The present invention relates to a high-grade water treatment device for injecting a high concentration of ozone into water to be treated, and then treating the treated water through the activated carbon filter layer.

[0002]

[Prior art]

 For example, when treating clean water such as an elevated water tank, if combined high-concentration ozone treatment and activated carbon filtration are used, the removal rate of impurities in the clean water will be greatly improved and the clean water will be highly purified. can do. However, in such an apparatus, the adsorption capacity of activated carbon was limited, and the activated carbon had to be replaced every 3 to 6 months. Activated charcoal became a hotbed for bacteria. In particular, treating clean water with high-concentration ozone produces a strong bactericidal effect by ozone, and also decomposes and aggregates organic substances to highly remove dirt components in the activated carbon filter tank. The decomposition of organic matter causes activated bacteria to proliferate bacteria significantly more than in the case of normal activated carbon treatment. This bacterium can be sterilized by subjecting the water treated with the activated carbon filter layer to ozone treatment again, but this method is not always preferable because it causes a problem of residual ozone. For this reason, conventionally, an ultraviolet sterilizer is usually provided.

However, in this sterilizer, the capacity of the sterilizing lamp becomes large, the equipment cost becomes high, and there is a possibility that the sterilization becomes insufficient for the remarkable generation of bacteria. In addition, since this sterilizer does not act on the bacterial growth source itself in the activated carbon and sterilizes the bacteria that flow out from this, a sterilization lamp must be used at all times, which reduces operating costs and sterilization. There was a problem that maintenance costs such as replacement of lights would be high. Furthermore, UV sterilization did not contribute to the extension of the life of activated carbon.

[0004]

[Problems to be solved by the device]

 SUMMARY OF THE INVENTION The present invention aims to solve the above problems in the prior art, to obtain a sterilizing effect with a low cost and simple structure, to extend the life of activated carbon, and to provide a highly economical advanced water treatment device. To do.

[0005]

[Means for Solving the Problems]

 In order to solve the above-mentioned problems, the present invention provides a high-grade water treatment device that injects a high concentration of ozone into treated water and then passes the treated water through an activated carbon filter bed to heat water to a predetermined temperature. Means and a conduit for passing the water heated by the heating means through the activated carbon filter layer.

[0006]

[Action]

 According to the present invention, it is possible to heat the water by the heating means to raise it to a predetermined temperature and pass the water heated by the pipe through the activated carbon filter layer, so that the activated carbon filter layer is sterilized and washed with hot water. You can This hot water kills the Bacteria in the activated carbon filter bed, so the problem of bacterial multiplication in activated carbon is solved even when ozone treatment is performed. Also, by backwashing with hot water, the substances adsorbed on the activated carbon are desorbed. In this case, in the treated water that has been subjected to ozone oxidation, foreign matters such as organic substances are likely to be hydrophilized bonds, so that they are easily desorbed by backwashing with hot water, and the backwashing effect is improved. The predetermined temperature at which the water is heated by the heating means is a temperature at which the sterilizing action and the action of desorbing the substance adsorbed on the activated carbon are exhibited, for example, about 80 ° C.

[0007]

【Example】

 Figure 1 shows the schematic configuration of an elevated water tank water circulation cleaning device, which is an example of an advanced water treatment device. This device is a device for injecting ozone generated by the ozone generator 1 into the water tank circulating water which is the water to be treated, and then treating the circulating water through the water tank circulating water through the filtering device 2 having the activated carbon filter layer 2a. A heater 3 as a heating means for heating to a predetermined temperature of, for example, 85 ° C. to turn it into hot water, and a pipe 4 for passing the heated water through the activated carbon filtration layer from the direction opposite to the direction in which the aquarium circulating water passes. Have. The apparatus further includes an elevated water tank 5, a pump 6 for circulating water in the tank, a three-way switching solenoid valve 7, opening / closing solenoid valves 8, 9, 10, a temperature sensor 11, a circulation clean piping system, a backwash piping system, etc. Is equipped with.

In the ozone generator 1, pure water is electrolyzed by, for example, an electrolytic cell using a solid polymer electrolyte membrane to extract ozone gas having a high concentration of about 10 to 15%, and the ozone gas is introduced into an ozone gas dissolving tank. This is an electrolytic ozone generator that obtains high-concentration ozone water. At the bottom of the filtration device 2, there is provided a hot water distribution mechanism 2b including a perforated plate or the like for distributing the hot water for backwashing introduced from the pipe line 4, and the backwash water is dispersed and flowed to the activated carbon filtration layer 2a. , I try to improve the backwash effect. The heater 3 is provided with an electric heater 3a inside, and when water is flowed and the electric heater 3a is energized, hot water having a temperature of about 85 ° C is discharged from its outlet. It is desirable that the outlet pipe 4 of the heater 3 be made thinner than the main line for circulation cleaning so that the amount of water necessary for backwashing with hot water flows and the consumption of hot water is reduced. On the other hand, it is preferable that the pipe including the bypass solenoid valve 8 has a size larger than that of the pipe 4 so that the backwashing effect by the normal temperature circulating water after the backwashing with hot water is enhanced. Further, the drain pipe of the backwash water including the solenoid valve 9 may be a thin pipe. The heater 3 is not limited to an electric heating type, but a steam heating type or any other type can be used. Further, it is needless to say that a heater, a boiler or the like used for other purposes may also be used as the heater for this purpose without providing an independent heater. The water in the elevated water tank 5 is circulated and purified by this device, sent to a clean water supply system (not shown), and the water consumption is supplemented from a water main.

With the above-mentioned structure, the present apparatus operates as follows. In normal circulation cleaning, the ozone generator 1 and the pump 6 are operated, the main circulation path side of the solenoid valve 7 is opened and the solenoid valve 10 is opened, and the water in the elevated water tank passes through the main circulation path including the filtration device 2. Is circulated and cleaned. The high-concentration ozone water produced by the ozone generator is introduced into the inlet side of the filtration device 2 by an eductor (not shown), etc., and acts to sterilize bacteria in the circulating water and decompose and aggregate organic substances, In the filtration device 2, the activated carbon filtration tank 2a adsorbs dirt components and the like, and the circulating water is highly purified.

On the other hand, the activated carbon of the filtration device 2 is gradually clogged due to the attachment of dirt components and the like, and also causes bacteria to grow. Particularly in advanced water treatment equipment that also uses high-concentration ozone treatment, the growth of bacteria becomes remarkable due to the decomposition action of the organic substances contained in ozone. Therefore, in this apparatus, for example, hot water is used once a day to backwash the activated carbon filtration layer. This backwashing can be performed by a machine-side manual operation or a remote manual operation, but in this embodiment, automatic backwashing is performed as follows.

In a control device (not shown), a timer operates at a certain time of the night during the day, the main circulation path side of the solenoid valve 7 and the solenoid valve 10 are closed, and the heater side of the solenoid valve 7 is closed. Also, the solenoid valve 9 is opened, water flows to the backwash side, and the heater 3 is turned on. The backwash water is heated by the heater 3, the temperature inside the filtering device 2 rises, and the temperature sensor 11 detects that the temperature of the backwash water after leaving the filtering device 2 has risen to 70 ° C. Then, 10 minutes after that, the energization of the heater 3 is stopped and the solenoid valve 8 is opened. Therefore, for at least 10 minutes, the hot water heated by the heater 3 is introduced into the filtration device 2 through the pipe line 4, distributed by the hot water distribution mechanism 2b and flows substantially uniformly through the activated carbon filtration layer 2a, and the solenoid valve 9 is turned on. The water is backwashed by being discharged through the discharge pipe.

After the backwashing with hot water is completed, the filtration device 2 is cooled and backwashed with normal temperature water for a few minutes thereafter. At this time, since the bypass solenoid valve 8 is opened, the flow rate passing through the filtering device 2 becomes larger than that during backwashing with hot water. Then, foreign matter that has been desorbed from the activated carbon or easily desorbed by backwashing with hot water is more completely desorbed and discharged. When backwashing is completed, the operation of the timer closes the flow path on the heater side of the solenoid valve 7 and the solenoid valves 8 and 9, and opens the circulation cleaning side of the solenoid valve 7 and the solenoid valve 10 again, so that normal circulation cleaning is performed. Is resumed.

According to the apparatus as described above, the backwashing of the activated carbon filtration layer with hot water kills the bacteria in the filtration tank, and even when ozone treatment is carried out, the proliferation thereof is prevented. Therefore, the ultraviolet sterilizer that has been conventionally provided is no longer necessary. In addition, foreign matter adhering to the activated carbon is effectively desorbed and removed by backwashing with hot water. In this case, the ozone treatment makes it easier for organic substances and the like to become hydrophilic bonds, further enhances the effect of backwashing with hot water, and foreign substances adsorbed on the activated carbon are desorbed very well. As a result, it was confirmed that such a device of the present invention extends the life of activated carbon to 1 year or more as compared with the conventional 3 to 6 months.

[0014]

[Effect of device]

 As described above, according to the present invention, by combining the advanced water treatment including ozone treatment and the backwashing with hot water, the bacterial growth action by ozone is prevented and the activated carbon filter bed is extremely effectively washed. The double effect of becoming is obtained. Further, it is not necessary to install an ultraviolet sterilizer, the cost of the entire apparatus and the running cost can be reduced, and the life of the activated carbon can be greatly extended. As a result, the advanced water treatment system can be made more economical.

[Brief description of drawings]

FIG. 1 is an explanatory diagram showing the overall configuration of an elevated water tank water circulation cleaning device which is an example of an advanced water treatment device.

[Explanation of symbols]

 1 Ozone Generator 2a Activated Carbon Filtration Layer 3 Heater (Heating Means) 4 Pipeline

Claims (1)

[Scope of utility model registration request] 1. A heating means for heating water to a predetermined temperature in a high-grade water treatment apparatus for treating treated water by injecting a high concentration of ozone into the treated water and then passing the treated water through an activated carbon filter layer, and the heating means. And a pipe for passing the water heated in step 1 through the activated carbon filtration layer.