JPS61117335A - Water quality controller of drinking water storage equipment - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

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 water supplies, simple water supplies, and dedicated water supplies, as well as water tanks and elevated water tanks for simple and exclusive water supplies in buildings, schools, housing complexes, factories, public facilities, hospitals, etc. There are also small water tanks, elevated water tanks, and emergency drinking water storage tanks that are not covered by the simple water supply system, but even if the water supplied to these facilities is suitable for drinking, such as tap water, once the water has been stored. Up until now, there has been almost no management of water.Only ME20 is regulated as a simple private water supply.
Water tanks graded I or above 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 done. Furthermore, the current situation is that there is no inspection or management of drinking water storage facilities that are not subject to the regulations of simple water supply facilities, and therefore active management of water stored in drinking water storage facilities has not been carried out in the past. It was common that they were 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, the water becomes contaminated from outside the water storage facility.
If the amount of contamination exceeds the sterilization capacity of the stored water, 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 flowing into the drinking water storage device and the amount of filtrate flowing out, such as a school water tank, where the hourly, daily, monthly, or yearly amount of water used fluctuates widely, the retention time is long. Become.

In addition, drinking water storage equipment is structurally open to atmospheric pressure, has ventilation holes and overflow devices, 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 increase the retention time, and contamination from the outside cannot be avoided due to the structure, but conventional drinking water storage equipment also stores water quietly. Therefore, not only contamination from the outside, but also dirt contained in the water flowing into the drinking water storage device will settle and accumulate inside the drinking water storage device while the stored water is stagnant. Traditional drinking water storage equipment acts as a sedimentation tank, allowing small amounts of contaminants to accumulate.
It has serious deficiencies that result in contamination being concentrated and flowing out of the water storage facility.

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 injection amount when there is a large amount of dirt, but when the amount of dirt is small, the concentration of the sterilant becomes high (which makes the water taste bad). If the injection amount is set at times, the amount of medicine injected may be insufficient, making it impossible to supply safe water.In this way, conventional methods have the drawback of being extremely difficult to adjust, and deposits may accumulate in drinking water storage equipment. It was completely impossible to deal with contamination.Furthermore, even if you try to use the water in the water storage device for drinking when the electric power is stopped, such as during an earthquake disaster, it will not be possible to use it 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 water creates areas where water flows and where it stagnates. It is extremely difficult for a water-metal body to be in a uniform state.

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 sterilization state inside such piping and controlling 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 water and metal bodies stored in a drinking water storage facility, a filter that removes dirt from the water in the drinking water storage facility, and a sterilization device in the circulation circuit. Sensors are installed to detect the condition of drinking water storage equipment to remove contaminants that have entered the drinking water storage equipment, and to prevent contamination caused by bacteria and other microorganisms, sterilizing agents are injected as appropriate to ensure that the water in the drinking water storage equipment is constantly maintained. This makes it possible to maintain clean water quality that is hygienically 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, a filter, and a sensor that detects a change in the sterilization state of water and transmits the change as an electrical signal, which are arranged in series in sequence: A sensor that receives the electrical signal and transmits a signal that activates and operates a chemical supply device. The present invention relates to a water quality control device for a drinking water storage facility, including: a control unit; and a chemical supply device for supplying a chemical into the pipe line downstream of any of the circulation pump, filter, and sensor.

The water quality of the drinking water storage equipment of the present invention is as follows: The management device will be explained using drawings.

Figure 1 shows the water quality of the drinking water storage equipment of the present invention. It is a schematic diagram showing an example of a management device.

In Figure 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 and introducing water from the drinking water storage equipment 1 through the pipe 9A;
Reference numeral 2 denotes an outlet for returning water to the drinking water storage facility 1 via the pipe 9B, and there is a pipe line 23 from the inlet 21 to the outlet 22. In the conduit 23, a circulation pump 2, a sensor 4 that detects a change in the sterilization state of water and transmits the change as an electric 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 and receives the electric signal sent from the sensor 4 and sends the electric signal to the drug supply device 6 to operate the supply device, but this operation can be performed intermittently or Alternatively, the flow rate may be changed.The chemical supply pump 6 injects the chemical from the chemical storage tank 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 facility 1 is constantly circulated by a circulation pump 2 and stirred uniformly, and dirt in the water in the drinking water storage facility 1 is removed by a 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 concentrate in the drinking water storage equipment, and all the dirt is removed by the filter 3, so that the water cannot be used for drinking water. The water in the water storage facility can be kept clear at all times. In addition, a sensor 4 is installed in the circulation circuit to measure the sterilization state in the drinking water storage equipment 1, so that when the sterilization state in the drinking water storage equipment falls below a set value, the control unit 5 senses it. 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 serves both of the functions as circulation and stirring equipment, but it is not particularly necessary to limit the pump to serve both of the functions of 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 Figure 2 may be used, or a gas may be introduced into the drinking water storage equipment and its buoyancy will create an agitating flow. By applying a temperature difference to the water in a drinking water storage facility and partially changing the specific gravity of the water, an agitating flow is created.
The water within the equipment may be uniformly stirred.

Next, filters for removing dirt from water in drinking water storage equipment include fiber, paper, filters using synthetic resin membranes, sand, anthracite, garnet, activated carbon, zeolite, ion exchange resin, chamotte, natural ore, 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 filter may be installed anywhere as long as it is in the circulation circuit, and there is no particular limitation. 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 thread sterilizing agents. An example of this is shown in FIG. 3, which requires an ozone generator 12 and a blower 11 for delivering ozone as a chemical supply device.

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 thread sterilizers and ozone-based sterilizers are used. .

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 the value is used to give an instruction 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, receiving ponds, distribution reservoirs, water receiving tanks in dedicated waterworks, elevated water tanks, disaster water storage tanks, etc., and the materials thereof include concrete, tilework, and brick. There are stacked aquariums, assembled aquariums made of plastic and metal panels, wooden aquariums, etc., and their shapes include square, circular, oval, polygonal, etc., but the shapes of water storage equipment that are subject to the equipment of the present invention include The material is not limited.

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, and the amount of water flowing out from the drinking water storage device will be small (so that even if the residence time is longer, the amount of water inside the drinking water storage device will be reduced). The water stored in the device circulates,
The water is constantly circulated between the drinking water storage device and the water quality control device of the present invention by stirring and mixing devices, dirt is removed between them, and sterilization is monitored and controlled.
Prevents dirt from settling or condensing inside the drinking water storage device (and replenishes the sterilization power consumed by dirt mixed in from the outside, and constantly responds to external contamination (sterilization power)
It is possible to bring the state to a certain state. 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. This prevents dirt from accumulating, concentrating, and further proliferating (This treatment is for relatively light dirt that enters the water storage equipment, and the amount of chemicals that need to be injected is small and constant. It has the advantage of being able to be managed stably.

As described above (the present invention is designed to keep the water in drinking water storage equipment, that is, waterworks, water receiving ponds for simple waterworks, distribution reservoirs, water receiving tanks for private waterworks, elevated water tanks of architectural structures, and disaster water storage tanks) always clear, and Since it is sterilized, it is an extremely superior water quality control device that can maintain safety as a drinking water tank.
It is practical and useful.

[Brief explanation of drawings]

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...River-filter 4...
・・Sensor 6・・Medicine supply device 7・・・・
Chemical storage tank 8... Chemical injection pipe 11...
...Blower 12, song, ozone generator 21...
・Inlet 22...Outlet 23...Pipeline

Claims (1)

[Claims] 1. Having an inlet 21 at one end for receiving water from the potable water storage facility, and an outlet 22 for returning water to the potable water storage facility.
a conduit 23 having at the other end; a circulation pump 2 and a filter 3 arranged in series in an arbitrary order within the conduit 23; detecting a change in the sterilization state of the water and transmitting the change as an electrical signal; a sensor 4; a control unit 5 that receives the electrical signal and sends a signal to operate the drug supply device; A water quality control device for a potable water storage facility, comprising: a chemical supply device for supplying water; 2. The device according to claim 1, wherein the sequence is a circulation pump 2, a sensor 4, and a filter 3, which are sequentially arranged from the inlet 21 to the outlet 22. 3. The chemical supply device includes a chemical supply pump 6 that 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 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. A variable flow type chemical supply pump 6 in which the chemical supply device receives a signal from the control unit 5 and changes the chemical injection amount in proportion to the product of the circulating water volume and the residual concentration of the sterilant;
Claim 1 or 2, comprising: a chemical storage tank 7 connected to the inflow side of the pump 6; and a chemical injection pipe 8 connecting the discharge side of the pump 6 to the downstream side in the pipe line 23. The device according to item 2. 5. The chemical supply device includes an ozone generator 12, a blower 11 that operates upon receiving a signal from the control unit 5 and supplies air to the ozone generator 12, and a discharge side of the ozone generator 12. The device according to claim 1 or 2, comprising a drug injection pipe that connects the downstream side of the pipe line 23. 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 chamotte 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.