JPS6314136B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a water quality control device for drinking water storage equipment. Drinking water storage equipment includes water tanks and distribution tanks for waterworks, simple water supply, and private water supply, as well as water tanks and elevated water tanks for simple and exclusive water supply in buildings, schools, housing complexes, factories, public facilities, hospitals, etc. There are small water tanks, elevated water tanks, disaster drinking water storage tanks, etc. that are not covered by the simple dedicated water supply system, but even if the water supplied to these facilities is water that is suitable for drinking, such as tap water, once stored water is Up until now, very little control has been carried out.
The capacity is slightly regulated as a simple private water supply.
Water tanks larger than 20 m ³ are required to be cleaned and inspected for water quality at least once a year, but active management is required to ensure that the water stored in the tank is always clear and safe for drinking. It had not been talked about.
Furthermore, the current situation is that there is no inspection or management of drinking water storage facilities that are not subject to regulations for simple water supply facilities, and therefore active management of water stored in drinking water storage facilities has not been particularly conducted in the past. Generally, it was not. The present invention provides an apparatus for actively managing water stored in a drinking water storage facility.

Conventionally, in drinking water storage facilities where general water quality control has not been carried out, as the residence time of the water stored there increases, contamination occurs from outside the water storage facility, and the amount of contamination increases when the sterilization of the stored water increases. If the capacity is exceeded, the safety of the water in the water storage facility cannot be maintained. That is, a drinking water storage device is used to buffer fluctuations in the amount of drinking water used, and due to its nature, it necessarily requires a certain amount of residence time. In devices where there is a large difference between the amount of water that flows into the drinking water storage device and the amount of water that flows out, such as a school water tank, where the hourly, daily, monthly, or annual amount of water used fluctuates greatly, the retention time will be longer. .

Additionally, drinking water storage equipment is structurally open to atmospheric pressure, has ventilation holes and an overflow device, and is open to the outside of the equipment. Therefore, contamination from outside the equipment is unavoidable, and contamination from the outside of water stored in drinking water storage equipment always occurs, although there may be differences in degree.

As described above, due to the nature of drinking water storage equipment, it is impossible to eliminate retention time, and due to its structure, contamination from the outside cannot be avoided.However, conventional drinking water storage equipment stores water quietly. In addition to external contamination, dirt contained in the water flowing into the drinking water storage device also settles and accumulates inside the drinking water storage device while the stored water is stagnant. As described above, conventional drinking water storage equipment has a serious defect in that it acts as a sedimentation tank, where small amounts of contaminants are deposited, and the contaminants become concentrated and flow out from the water storage equipment. .

Supplying such contaminated water as drinking water is extremely dangerous and undesirable from a sanitary standpoint. Conventionally, a method has been used to address this situation by injecting sterilizing agent into the water pipes that are sent out from drinking water storage equipment by water supply pumps, etc., but since the amount of dirt in the water storage tank fluctuates, the injection amount cannot be adjusted. It is difficult to adjust the amount of sterilizer to be injected when there is a large amount of dirt, but when the amount of dirt is small, the concentration of the sterilizing agent becomes higher and the taste of the water becomes worse. On the other hand, if the injection amount is set when the amount of dirt is small, the amount of chemical injection may be insufficient, making it impossible to supply safe water. As described above, the conventional method has the disadvantage that it is very difficult to adjust, and it has not been able to deal with the contaminants that settle and accumulate in drinking water storage equipment. Furthermore, even if an attempt is made to use the water in the water storage device for drinking when the electric power is stopped due to an earthquake disaster, etc., the water cannot be used for drinking as is. In addition, this type of sterilization method has been used in some swimming pools, but in large aquariums such as swimming pools, simply circulating the water creates areas where the water flows and where it stagnates, making it difficult to keep the water uniform throughout. It is extremely difficult to be in this situation. The quality of water flowing into the circulation piping in such a state cannot necessarily be said to be the quality of the water as a whole. Therefore, detecting the sterile state inside the piping and controlling the sterilization is not suitable for use in beverages. The present invention provides a water quality control device for drinking water storage equipment that eliminates these drawbacks.

That is, the present invention provides a device that uniformly circulates and mixes the entire water stored in a drinking water storage facility, a filter in the circulation circuit that removes dirt from the water in the drinking water storage facility, and a sterilized state. In addition to removing contaminants that have entered the drinking water storage equipment, the water in the drinking water storage equipment is always kept sanitary by injecting sterilizing agents to prevent contamination caused by microorganisms such as bacteria. This makes it possible to maintain clear water quality that is safe and suitable for drinking.

That is, the present invention provides a conduit having an inlet at one end for receiving water from a potable water storage facility and an outlet at the other end for returning water to the potable water storage facility; a circulation pump and a filter arranged in series; a sensor that detects a change in the sterilization state of water and transmits the change as an electrical signal; and a control unit that receives the electrical signal and transmits a signal to operate the chemical supply device. The present invention relates to a water quality control device for a drinking water storage facility, including: a chemical supply device for supplying a chemical into the pipeline downstream of any of the circulation pump, filter, and sensor;

The water quality control device for drinking water storage equipment of the present invention will be described below with reference to the drawings.

FIG. 1 is a schematic diagram showing an example of a water quality control device for drinking water storage equipment of the present invention.

In FIG. 1, 1 is a drinking water storage facility, 2 is a circulation pump as a circulation device, 3 is a filter that removes dirt from the water in the water storage device, and 4 is a sensor that measures the sterilization state of the water in the water storage facility. , 5 is a control unit that senses and controls the value sent from the sensor, 6 is a chemical supply device that operates upon receiving instructions from the control unit, 7 is a chemical storage tank, 8 is a chemical injection pipe, 9A and 9B are Shows water circulation piping.

FIG. 1 will be explained. 21 is an inlet for receiving water from the drinking water storage equipment 1 via the pipe 9A, and 22 is an outlet for returning water to the drinking water storage equipment 1 via the pipe 9B. There is a conduit 23. Inside the conduit 23,
A circulation pump 2, a sensor 4 for detecting a change in the sterilization state of water and receiving the change as an electrical signal, and a filter 3 are arranged in series in an arbitrary order. Therefore, a closed circuit is formed by the drinking water storage equipment 1, the pipe 9A, the pipe 23 from the inlet 21 to the outlet 22, and the pipe 9B.

The control unit 5 receives the electrical signal sent from the sensor 4 and sends the electrical signal to the chemical supply device 6 to operate the supply device, but this operation can be performed intermittently or at a constant flow rate. It is also possible to change the . The chemical supply pump 6 injects the chemical from the chemical reservoir into the conduit 23 via the chemical injection pipe 8 . This injection location is downstream of any of the circulation pump 2, sensor 4, and filter 3. The water in the drinking water storage equipment 1 is constantly circulated by the circulation pump 2 and stirred uniformly, and the dirt in the water in the drinking water storage equipment 1 is removed by the filter 3 installed in the circulation circuit. Therefore, the water in the drinking water storage equipment 1 constantly flows, and the mixed dirt does not settle and become concentrated in the drinking water storage equipment, and all the dirt is removed by the filter 3. The water in the drinking water storage facility can be kept clear at all times. In addition, since a sensor 4 is installed in the circulation circuit to measure the sterilization state in the drinking water storage equipment 1, the control unit 5 senses when the sterilization state in the drinking water storage equipment falls below a set value. ,
Since the sterilizing agent supply device 6 is operated until the sterilization state reaches a set value or higher, the water can always be kept hygienically safe.

FIG. 1 is one embodiment, and shows an example of a circulation pump that has both functions as circulation and stirring equipment, but there is no particular need to limit it to having both functions as circulation and stirring. FIG. 2 shows an example in which the circulation pump 2 and the stirring equipment 10 in the drinking water storage equipment are used separately. As the stirring equipment in the drinking water storage equipment, a mechanical stirrer as shown in Fig. 2 may be used, or a gas may be introduced into the drinking water storage equipment to create an agitating flow by its buoyancy. It is also possible to uniformly stir the water in the drinking water storage equipment by creating a stirring flow by applying a temperature difference to the water in the drinking water storage equipment and partially changing the specific gravity of the water.

Next, filters for removing dirt from water in drinking water storage equipment include filters using fiber, paper, and synthetic resin membranes, sand, anthracite, garnet, activated carbon, zeolite, ion exchange resin, siyamoto, natural ore, and artificial. Commonly used filters such as filters using filter media and filters using diatomaceous earth or powdered activated carbon as filter aids are used. Further, the installation location of the filter is not particularly limited as long as it is in the circulation circuit. The filter can be applied not only to filters pressurized by the discharge pressure of a circulation pump, but also to gravity filters.

The sterilizing agent used in the apparatus of the present invention is not limited to chlorine-based sterilizing agents, and ozone may also be used in addition to silver-based sterilizing agents. An example of this is shown in FIG. 3, where an ozone generator 12 is used as a chemical supply device.
Therefore, a blower 11 that sends out ozone is required. Ozone is sterilized by sending ozone into the water circulation pipe 9 through the chemical injection pipe 8 using a blower.
Residual chlorine sensors, which measure the effectiveness of chlorine-based sterilizers, are mainly used as sensors to measure sterilization status, but sensors that detect the effects of silver-based sterilizers and ozone-based sterilizers are used. It will be done.

The value measured by the sensor is first converted into a weak current generated in the sensor and sent to the control unit 5, where it is further amplified, and based on the value, an instruction is given to the drug supply device to perform proper drug injection. A pump is used as the chemical supply device, but a suction type syringe or a solid sterilant dissolving type syringe can also be used.

Drinking water storage equipment according to the present invention includes waterworks, simple waterworks, landing ponds, distribution reservoirs, water receiving tanks in private waterworks, elevated water tanks, disaster water storage tanks, etc.
The materials include concrete, tiled, brick-built aquariums, assembled aquariums made of plastic and metal panels, and wooden aquariums, and their shapes include square, circular, oval, polygonal, etc., but the present invention There are no limitations on the shape and material of the water storage equipment that is the target of the equipment.

If the water quality control device for a drinking water storage device of the present invention is used, the amount of water used will be small, the amount of water flowing out from the drinking water storage device will be reduced, and even if the retention time is longer, the water will remain in the drinking water storage device. The stored water is constantly circulated between the drinking water storage device and the water quality control device of the present invention by the circulation and stirring/mixing devices of this device, and dirt is removed between them, and the sterilization state is monitored.
Because it is controlled, dirt does not settle, accumulate, or concentrate inside the drinking water storage device, and it replenishes the sterilization power consumed by dirt mixed in from the outside, making it always responsive to external contamination. (sterilizing power). Moreover, to remove dirt and replenish the sterilization power, all you have to do is to replenish the dirt and sterilization power during one cycle of water in the drinking water storage equipment. It is possible to treat relatively light dirt that enters the water storage equipment without accumulating, concentrating, and further proliferating the dirt, and it is stable because only a small amount of chemicals can be injected at a fixed amount. It has the advantage of being able to be managed in a controlled manner.

As described above, the present invention constantly keeps water clear and sterilized in drinking water storage facilities, such as waterworks, water receiving ponds for simple water supplies, distribution reservoirs, water receiving tanks for private water supplies, elevated water tanks in buildings, and disaster water storage tanks. Therefore, it is an extremely excellent water quality control device that can maintain safety as a drinking water storage tank, and is both practical and useful.

[Brief explanation of the drawing]

FIG. 1, FIG. 2, and FIG. 3 are schematic diagrams showing an embodiment of the water quality control device for drinking water storage equipment of the present invention. 1...Water quality control device for drinking water storage equipment, 2...
Circulation pump, 3... Filter, 4... Sensor, 6... Chemical supply device, 7... Chemical storage tank, 8
... Chemical injection pipe, 11 ... Blower, 12 ... Ozone generator, 21 ... Inlet, 22 ... Outlet, 2
3... Conduit.

Claims (1)

[Scope of Claims] 1. A conduit 23 having an inlet 21 at one end for receiving water from a drinking water storage facility and an outlet 22 at the other end for returning water to the drinking water storage facility; 23, a circulation pump 2 installed in series in an arbitrary order, a filter 3, and a sensor 4 that detects a change in the sterilization state of water and transmits the change as an electric signal; and a drug supply device that receives the electric signal. A control unit 5 for transmitting a signal for activating the system; and a chemical supply device for supplying a chemical into the conduit 23 downstream of any of the circulation pump 2, filter 3, and sensor 4; Water quality control device for water storage facilities. 2. The device according to claim 1, wherein the sequence is a circulation pump 2, a sensor 4, and a filter 3 sequentially from the inlet 21 to the outlet 22. 3. The chemical supply device includes a chemical supply pump 6 which is operated intermittently in response to a signal from the control unit 5, a chemical storage tank 7 connected to the inflow side of the pump 6, and a chemical storage tank 7 connected to the inflow side of the pump 6 and the discharge side of the pump 6. The device according to claim 1 or 2, comprising a drug injection pipe 8 that connects the downstream side in the pipe line 23. 4. The chemical supply device includes a variable flow rate type chemical supply pump 6 in which the chemical injection amount changes in proportion to the product of the circulating water volume and the residual concentration of the sterilant upon receiving a signal from the control unit 5, and the pump 6. and a chemical injection pipe 8 that connects the discharge side of the pump 6 to the downstream side of the pipe line 23. The device described. 5 The chemical supply device is an ozone generator 12
a blower 11 that operates upon receiving a signal from the control unit 5 to supply air to the ozone generator 12; and a chemical that connects the discharge side of the ozone generator 12 to the downstream side of the pipe 23. The device according to claim 1 or 2, comprising an injection tube. 6. The device according to claim 1 or 2, wherein the sensor 4 is a residual chlorine sensor. 7. The device according to claim 1 or 2, wherein the sensor is a silver ion electrode. 8. The device according to claim 1 or 2, wherein the filter 3 is a cartridge type filter using fiber, paper, porous synthetic resin membrane, or sintered metal as a material. 9. The device according to claim 1 or 2, wherein the filter 3 is a filter using filter sand, anthracite, garnet, or siyamoto as a filter medium. 10. The device according to claim 1 or 2, wherein the filter 3 is a filter using activated carbon. 11. The device according to claim 1 or 2, wherein the filter 3 is a filter using ion exchange resin or zeolite. 12. The device according to claim 1 or 2, wherein the filter 3 is a filter using natural ore. 13. The device according to claim 1 or 2, wherein the filter 3 is a filter using an artificial filter medium.