JP4439460B2 - Water supply system - Google Patents

Description

  The present invention relates to a water supply system that purifies water from a water source with a specified maximum water intake amount at a water purification plant, and supplies water to a single or a plurality of customers from the water purification plant.

  In the conventional water supply system, water from a water source such as a river, a dam reservoir, or groundwater is sent to a water purification plant, where it is purified and then supplied to a single or a plurality of customers.

  In this case, the maximum amount of water taken from the water source to the water treatment plant is regulated by the water rights, and the maximum amount throughout the year is required for the water treatment plant to respond to fluctuations in demand (seasonal variation) throughout each season. Water supply that sets the water rights that can respond to the demand and has the capacity to supply, and also responds to fluctuations in demand throughout the day (daily fluctuations). Driving is taking place.

  However, in such a conventional water supply system, when the fluctuation in demand is large throughout the year, a water supply facility corresponding to the maximum demand is installed in the water treatment plant. The utilization rate was low and uneconomical.

  In addition, since the maximum water intake from the water source is regulated by water rights, it cannot follow fluctuations in demand, and the actual water intake depends on the climate and is not stable. In some cases, water supply that satisfies the demand could not be achieved.

  Furthermore, it is not easy to perform water supply operation according to the daily demand fluctuation at the water purification plant, and the human load on the operator is high. Conversely, if the water purification plant is not operated in response to daily demand fluctuations and the water purification plant is operated with a full set of water rights, the excess of the purified water will be exceeded. The operating cost of minutes was wasted.

  The present invention solves the problems as described above, can increase the equipment utilization rate of the entire system, can easily perform water supply operation according to daily demand fluctuations, and can reduce the burden on the operator. The purpose of the present invention is to provide a water supply system that can supply water stably even when the water source is drought, regardless of the climate.

  In order to achieve the above object, the present invention constitutes a water supply system by the following means.

  The present invention provides a first water source in which a maximum water intake amount is defined, and a first purified water that purifies the water intake from the first water source and supplies a certain amount of water to a single or a plurality of consumers through a water supply system. A second water source that is not subject to the maximum water intake, a second water purification plant that is connected to the water supply system so that the water taken from the second water source can be purified, and to the consumer. The received water amount measurement signal measured by the installed measurement sensor is input, and the amount of water received from the customer with respect to the amount of water supplied from the first water purification plant is monitored to adjust the amount of water supplied from the second water purification plant. A monitoring device, wherein the monitoring device calculates a total value of the amount of water received by the consumer measured by the measurement sensor as a total demand amount, and the total demand amount and a constant water supply amount from the first water purification plant And a calculation means for performing a difference calculation and a size comparison calculation. When the small comparison operation result is larger the total demand than the predetermined water supply amount, and water adjusting the water amount corresponding to the supply shortage from the second water purification plants.

  Further, the present invention provides a first water source having a maximum water intake amount, and a first water source that purifies the water intake from the first water source and supplies a certain amount of water to a single or a plurality of consumers through a water supply system. A second water source that is not subject to the maximum water intake, a second water source that is connected to the water supply system so as to be able to supply water to the second water source, and this second water source. A water storage tank provided between the water purification plant and the water supply system so that the purified water of the second water purification plant can be replenished and the supply water can flow into and out of the water supply system; Monitoring that adjusts the amount of water supplied from the second water treatment plant by monitoring the amount of water received by the customer with respect to the amount of water supplied from the first water purification plant by receiving a water amount measurement signal measured by an installed measurement sensor The monitoring device is a total amount of water received by the consumer measured by the measurement sensor Is calculated as a total demand, and has a calculation means for performing a difference calculation and a size comparison calculation between the total demand and a constant water supply amount from the first water purification plant, and the magnitude comparison calculation result of the calculation means When the total demand is smaller than a certain amount of water supply, the excess supply amount that is the difference calculation result is stored in the water tank, and when the total demand is greater than the constant water supply amount, the difference calculation If the resulting supply shortage is supplied to the water supply system from the water storage tank and the water storage capacity of the water storage tank is still insufficient, the supply water is replenished from the second water purification plant to the water storage tank. Then, the water supply load of the first water purification plant is leveled and adjusted.

  According to the present invention, the water supply capacity of the first water treatment plant that draws water from the first water source defined by conventional water rights, dam capacity, etc. is reduced from the maximum amount of annual fluctuation demand to the base load water supply amount. However, it is possible to increase the facility utilization rate of the entire system by supplying water from the second water treatment plant that draws water from the second water source that is not restricted by water rights or dam capacity. Stable water supply is possible even during drought.

  Moreover, in order to respond to demand fluctuations (daily fluctuations) in a water tank for demand fluctuations or a second water treatment plant with excellent load responsiveness, the first water purification plant according to daily demand fluctuations. Therefore, the water supply system as a whole can be easily operated and the human load on the operator can be reduced.

  Hereinafter, embodiments of the present invention will be described with reference to the drawings.

  FIG. 1 is a configuration diagram showing a first embodiment of a water supply system according to the present invention.

  In FIG. 1, 1 is a first water source such as a river, a dam reservoir, and groundwater, and 2 is a first purified water to which a constant flow of raw water whose maximum water intake is regulated by water rights is supplied from the first water source 1. The first water purification plant 2 purifies the raw water and supplies a certain amount of water M through the water supply system 4 to the plurality of consumers 3-1 to 3-5.

In addition, 5 is a drainage system drained from each customer 3-1 to 3-5, and 6 is a second water source that collects drainage from each customer 3-1 to 3-5 through this drainage system 5. The wastewater collected in the second water source 6 is supplied to the second water purification plant 7 and purified. In this case, out of the water used by each of the consumers 3-1 to 3-5, water that can be used as a water resource is discharged to the drainage system 5, and unusable sewage is discarded.

  The water purified in the second water purification plant 7 is supplied to a water tank 8 having a constant level control function. As shown in FIG. 2, this water storage tank 8 is provided with a weir 8a that divides the inside of the tank into two chambers on the clean water inflow side and outflow side, and this weir 8a communicates with both chambers on the bottom side in the tank. It is installed at such a height position.

  Moreover, such a water storage tank 8 is installed in a position lower than the first water purification plant 2, and purified water from the second water purification plant 7 flows in from the upper part of the room on the purified water inflow side, and the lower part of the room on the water purification outflow side. Is connected to the water supply system 4 described above, and an unillustrated pump is supplied when excess supply water of the water supply system 4 flows in due to positional energy due to the height difference from the water supply system 4 and when the supply water of the water supply system 4 is insufficient. Thus, the purified water can be discharged into the water supply system 4.

On the other hand, 9 is a monitoring device for monitoring the entire system on the second water source 6 side. The monitoring device 9 includes flow sensors 10-1 to 10-5 installed in the respective consumers 3-1 to 3-5. The received water amount (demand amount) measurement signal and the drainage amount measurement signal measured by the flow sensors 11-1 to 11-5 that measure the drainage amount from each of the consumers 3-1 to 3-5 are input. A predetermined calculation and determination process necessary for monitoring is performed based on a known constant water supply amount M supplied from each water purification plant 2 to each of the consumers 3-1 to 3-5.

  FIG. 3 is a functional block diagram for explaining the arithmetic processing by the monitoring device 9.

  In FIG. 3, reference numeral 9-1 denotes an arithmetic unit that calculates the total demand P by adding the received water amount measurement signals measured by the flow sensors 10-1 to 10-5 of the consumers 3-1 to 3-5. Reference numeral 2 denotes an arithmetic unit for obtaining a total drainage amount Q by adding drainage amount measurement signals measured by the flow sensors 11-1 to 11-5 of the consumers 3-1 to 3-5.

  9-3 represents a difference calculation (P−M) and a magnitude comparison calculation between the total demand P obtained by the calculator 9-1 and the constant water supply M supplied from the first water purification plant 2 to the customer. The first calculation unit 9-4 performs a comparison calculation as to whether or not PM> Q if the magnitude comparison calculation result in the first calculation unit 9-3 is PM> 0. This is a second calculation unit for obtaining the supply shortage.

  Next, the operation of the water supply system configured as described above will be described.

  First, the case where the water supply capacity (the constant water supply amount M) of the first water purification plant 2 is equal to or less than the total water reception amount (demand amount) P or within the fluctuation range of P will be described.

  Now, at the first water purification plant 2, the maximum water intake from the first water source 1 is reduced from the conventional maximum annual fluctuation to the minimum required amount, and the raw water supplied is purified. It is assumed that the first constant water supply amount M is supplied to 3-1 to 3-5.

  At this time, in each of the consumers 3-1 to 3-5, the received water amount measurement signals respectively measured by the flow sensors 10-1 to 10-5 and the drainage amount measurement signals measured by the flow sensors 11-1 to 11-5 are respectively shown. It is transmitted to the monitoring device 9.

  In the monitoring device 9, as shown in FIG. 3, the total value of the amount of water received by each consumer is calculated as the total demand P by the calculator 9-1 and discharged from each consumer by the calculator 9-2. The total amount of drainage is calculated as the total drainage Q.

  The first calculation unit 9-3 performs a difference calculation and a size comparison calculation between the total demand P and the constant water supply flow rate M supplied from the first water purification plant 2 to the customer. In this case, the total demand amount P added and calculated by the computing unit 9-1 fluctuates from moment to moment, which includes daily short-term fluctuations and seasonal long-term fluctuations.

  When the total demand P is smaller than the first constant water supply flow rate M supplied from the first water purification plant 2 as a result of the magnitude comparison in the first calculation unit 9-3, the first demand for the total demand P is The excess water supply, which is the difference calculation result of the first constant water supply flow rate M from the first water purification plant 2 to the customer, is stored in the water tank 8 provided between the second water purification plant 7 and the customer. Is done. In this case, if the water storage tank 8 is installed at a position lower than the water supply system 4 of the first water purification plant, the excess water supply flows into the water storage tank 8 due to the positional energy due to the height difference, and the water storage Is done. And since the lower part of the weir 8a which divides the inside of a tank into two chambers is connected across both chambers as shown in FIG. 2, even if the supply water of an excessive supply amount flows into the water storage tank 8, as shown in FIG. The water level in both rooms is always adjusted to the same level.

  Moreover, as a result of the magnitude comparison in the first calculation unit 9-3, when the total demand P is larger than the first feed water flow rate M supplied from the first water purification plant 2, the second calculation unit 9 -4, the difference between the total demand P and the first constant feed water flow rate M, that is, the supply shortage from the water storage tank 8 on the condition that the supply shortage is smaller than the total drainage Q obtained by the calculator 9-2. Water supply commensurate with In this case, water supply from the water storage tank 8 to the water supply system 4 is performed by operating a pump (not shown) according to a command issued from the monitoring device 9.

  Then, when water supply corresponding to the shortage of supply cannot be made only by the amount of water stored in the water storage tank 8, the second water source 6 is supplied with the second drainage that is not restricted by the maximum water intake amount collected from each consumer. The water is purified (recycled) at the water purification plant 5, supplied to the water storage tank 8, and supplied to the consumers 3-1 to 3-5 through the water supply system 4. That is, for short-term demand fluctuations, adjustment is mainly made by storing water in the water storage tank 8 and water supply from the water storage tank 8, and when the demand exceeds supply in the long term, supply from the second water purification plant 7 The shortfall will be covered.

  In this case, the second water purification plant 7 is operated in accordance with a command issued from the monitoring device 9, and the water taken from the second water source 6 is controlled by controlling the water supply pump or the valve or gate for opening and closing the flow path. The purified water that has been introduced into the place 7 and purified here can be supplied to the water storage tank 8.

Furthermore, when the supply shortage amount is larger than the total drainage amount Q obtained by the arithmetic unit 9-2 by the second arithmetic unit 9-4, the water supply amount of the first water purification plant 2 is determined by a command from the monitoring device 9. Adjust so that P− M < Q.

In the first embodiment having such a configuration, the water supply capacity of the first water purification plant 2 taking water from the first water source 1 defined by the water rights, dam capacity, etc. as in the prior art is set to the maximum of the annual fluctuation demand. A large amount of water is reduced to the minimum required base load water supply, and the demand fluctuation (daily fluctuation) is a water tank 8 for demand fluctuation and a second water source that is not restricted by water rights or dam capacity (drainage recovery) Since the water is supplied from the second water purification plant that takes water from the water), it is possible to increase the equipment utilization rates of the first water source 1 and the first water purification plant 2.

  For example, considering the supply business of drinking water and industrial water, which is generally carried out as a public project of local governments, only the first water treatment plant 2 that draws water from water sources that are restricted by water rights, dam capacity, etc. Therefore, it was necessary to have a supply capacity that could meet the annual maximum demand, and the amount of capital investment of the local government was greatly expanded.

  The first water treatment plant 2 operates only to supply base load water, adjusts the total demand and supply shortage, and is not subject to restrictions due to water rights or dam capacity (drainage recovery) By operating the second water purification plant (from the private sector) that takes water from the water, the burden on local governments can be reduced, and overall operations can be efficiently performed.

  In the first embodiment, the water storage tank 8 is installed in response to the demand fluctuation (daily fluctuation), and when the water supply to each of the consumers 3-1 to 3-5 is excessively supplied, the excess The amount of water is stored in the water storage tank 8 and when the supply is insufficient, the water supply corresponding to the shortage is performed from the water storage tank 8, but the water storage tank 8 is installed to handle only the long-term fluctuation due to the season. Without purifying, the waste water flowing in from the second water source 6 that collects the waste water of each of the customers 3-1 to 3-5 is purified at the second water purification plant 7, and the water supply due to long-term fluctuations from the second water purification plant 7 The shortage may be supplied to each of the consumers 3-1 to 3-5 through the water supply system 4 as described above.

  FIG. 4 is a block diagram showing a second embodiment of the water supply system according to the present invention. The same parts as those in FIG. 1 are denoted by the same reference numerals and the description thereof is omitted, and different parts will be described here.

  In the second embodiment, seawater is introduced into the second water source 6, and this seawater is desalinated by a seawater desalination facility installed in the second water purification plant 7 so that it can be supplied to the water tank 8. Therefore, unlike the first embodiment, the drainage system that collects the drainage of each of the consumers 3-1 to 3-5 in the second water source and the flow rate sensor that measures the drainage amount are unnecessary.

  In addition, the monitoring device 9 receives a received water amount (demand amount) measurement signal measured by the flow rate sensors 10-1 to 10-5 installed in the respective consumers 3-1 to 3-5, and receives the first signal. Based on the known constant water supply amount M supplied from the water purification plant 2 to each of the consumers 3-1 to 3-5, predetermined calculation and determination processing necessary for monitoring is performed.

  FIG. 5 is a functional block diagram for explaining the arithmetic processing by the monitoring device 9.

  In FIG. 5, reference numeral 9-1 denotes an arithmetic unit that obtains the total demand amount P by adding the received water amount measurement signals measured by the flow sensors 10-1 to 10-5 of the consumers 3-1 to 3-5. 3 is a first calculation that performs a difference calculation (P−M) and a size comparison calculation between the total demand P obtained by the calculator 9-1 and the constant water supply M supplied from the first water purification plant 2 to the customer. It is a calculation part.

  Next, the operation of the water supply system configured as described above will be described.

  Now, at the first water purification plant 2, the maximum water intake from the first water source 1 is reduced from the conventional maximum annual fluctuation to the minimum required amount, and the raw water supplied is purified. It is assumed that the first constant water supply amount M is supplied to 3-1 to 3-5.

  At this time, the received water amount measurement signals respectively measured by the flow sensors 10-1 to 10-5 are transmitted to the monitoring devices 9 in the respective consumers 3-1 to 3-5.

  In the monitoring device 9, as shown in FIG. 5, a total value of water received by each consumer is calculated as a total demand P by a calculator 9-1, and the total demand P is calculated by a first calculation unit 9-3. And a difference calculation and a magnitude comparison calculation between the first water purification plant 2 and the constant water supply flow rate M supplied to the customer. In this case, the total demand amount P added and calculated by the computing unit 9-1 fluctuates from moment to moment, which includes daily short-term fluctuations and seasonal long-term fluctuations.

Here, when the daily average of the total demand P when a certain day of the year is taken is less than or equal to the maximum water supply capacity M _MAX of the first water purification plant 2, the first water supply flow rate M is the total demand P The operation when the daily amount average value (constant value) is set will be described.

  When the total demand P is smaller than the first constant water supply flow rate M supplied from the first water purification plant 2 as a result of the magnitude comparison in the first calculation unit 9-3, the difference is the excess calculation result. A large amount of water is stored in a water tank 8 provided between the second water purification plant 7 and the customer, and as a result of comparison in magnitude in the first calculation unit 9-3, the total demand P is When it is larger than the first water supply flow rate M supplied from one water purification plant 2, the deficient amount as the difference calculation result is supplied from the water storage tank 8.

Next, when the daily average of the total demand P when taking a certain day of the year exceeds the maximum water supply capacity M _MAX of the first water purification plant 2, the first water supply flow rate M is the maximum water supply capacity M _MAX. The operation when (constant value) is set will be described.

  As a result of size comparison in the first computing unit 9-3, when the total demand P is smaller than the first feed water flow rate M from the first water purification plant 2 to the customer, the first demand for the total demand P The excess water supply, which is the difference calculation result of the first water supply flow rate M from the water purification plant 2 to the customer, is stored in the water tank 8 provided between the second water purification plant 7 and the customer, and When the total demand P is larger than the first constant water supply flow rate M supplied from the first water purification plant 2 as a result of the magnitude comparison in the first calculation unit 9-3, the difference is the result of the difference calculation An amount of water is supplied from the water tank 8.

  If the amount of water stored in the water storage tank 8 is not sufficient to supply water corresponding to the shortage of supply, seawater that is not restricted by the maximum water intake taken from the second water source 6 is used as the second water treatment plant 7. The water is desalinated by the seawater desalination facility installed in the water and sent to the water storage tank 8 and supplied to the consumers 3-1 to 3-5 through the water supply system 4.

  In the second embodiment having such a configuration, the water supply capacity of the first water treatment plant that draws water from the first water source defined by the conventional water rights, dam capacity, etc. is determined from the maximum amount of annual fluctuation demand. Since the water supply is reduced to the base load, and only the shortage is supplied from the second water purification plant that takes water from the second water source 6 and is not restricted by water rights or dam capacity, The system utilization rate of the entire system can be increased, and a system that can supply water stably even during drought can be constructed regardless of the climate.

  For example, when considering a drinking water and industrial water supply business that is generally conducted as a public project of a local government, the first water purification plant 2 that draws water from a water source that has been restricted by water rights, dam capacity, etc. As a result, it was necessary to have a supply capacity that could meet the annual maximum demand, and the capital investment of the local government was greatly expanded.

  The local government operates the water purification plant 2 that only supplies water for the base load, adjusts the shortage of total demand and water supply, and desalinates seawater, which is a stable water source that will not be depleted. By privatizing the water purification plant, the burden on local governments can be reduced and the operation can be efficiently performed as a whole.

  In addition, since the demand fluctuation (daily fluctuation) is handled by the storage tank for demand fluctuation or the second water purification plant 7 having excellent load responsiveness, the first water purification according to the daily demand fluctuation. It is not necessary to change the amount of water supplied to the site 2, the operation of the entire water supply system is easy, and the human load on the operator can be reduced.

  For example, considering the drinking water and industrial water supply business, which is generally conducted as a public project of local governments, the water supply was handled only at the water purification plant 2 in the past. The water treatment plant was not easy to operate, and the human burden on the operators was high.

  The local government operates the first water purification plant 2 that only supplies water for the base load, and the second water purification plant with excellent water responsiveness and a water storage tank that adjusts the excess and deficiency of the total demand and water supply. By privatizing 7, the water supply system as a whole can be easily operated and the human load on the operator can be reduced.

  In the second embodiment, the water storage tank 8 is installed corresponding to the fluctuation in demand (daily fluctuation), and when the water supply to each of the consumers 3-1 to 3-5 is excessively supplied, the excess The amount of water is stored in the water storage tank 8 and when the supply is insufficient, the water supply corresponding to the shortage is performed from the water storage tank 8, but the water storage tank 8 is installed to handle only the long-term fluctuation due to the season. The seawater taken from the second water source 6 is desalinated at the second water purification plant 7, and the shortage of water supply due to long-term fluctuations from the second water purification plant 7 is passed through the water supply system 4 to each customer 3 as described above. -1 to 3-5 may be supplied.

  Next, as a third embodiment of the present invention, a case where the water supply capacity (constant water supply amount) of the water purification plant is equal to or greater than the total water reception amount (total demand amount) P over a long period of time will be described.

  For example, in a tanker that transports crude oil, when going from Japan to the oil-producing country (local), balance is achieved by supplying seawater into the ballast tank, and after discharging the seawater locally, the crude oil is loaded and returned to the port. ing.

  However, the “Ballast Water Management Convention” was adopted in February 2004, and after the entry into force of this Convention, it becomes impossible for each ship to drain the seawater operated as ship ballast water with the same quality. In order to clear the water quality standards stipulated in this treaty, it is considered to install a water treatment device on the ship, but there is no technology at present.

In developing countries such as Middle Eastern oil producing countries where the necessary freshwater sources are limited to groundwater and seawater desalination, soil salinity increases due to excessive pumping of groundwater, and CO ₂ emissions and seawater salinity increases due to seawater desalination plants. The impact on the global environment is a problem.

  Therefore, in the third embodiment, in such a water supply system, when the water supply capacity of the water purification plant (constant water supply amount M) is equal to or greater than the total water reception amount (demand amount) over a long period of time, the excess supply amount is determined as the ship ballast water. It is intended to be used as.

  That is, in FIG. 6, 1 is a water source such as a river, a dam reservoir, and groundwater, and 2 is a water purification plant to which a constant flow of raw water whose maximum water intake is regulated by water rights is supplied from this water source 1. Is for purifying raw water and supplying a constant water supply amount M to the plurality of consumers 3-1 to 3-5 through the water supply system 4.

  Moreover, in order to divide supply water into use water and unused water in each consumer 3-1 to 3-5, the water storage tank as shown in FIG. 7 is installed.

  In FIG. 7, 13 is a water storage tank. This water storage tank 13 is separated by a partition wall 13a into a water storage chamber 13b for storing used water and a water storage chamber 13c for storing unused water, and water supplied to consumers is stored in the water storage chamber 13b. After being supplied, the water is discharged from the water storage chamber 13b as, for example, factory water, and when the water stored in the water storage chamber 13b exceeds a predetermined water level, the water overflowing from the partition wall 13a is stored as unused water in the water storage chamber 13c. It is configured to be. The water stored in the water storage chamber 13c is supplied to a tanker tank through a water pipe.

  In such a water supply system, in this embodiment, the received water amount is measured by the received water amount flow sensors 10-1 to 10-5 installed in the respective consumers 3-1 to 3-5, and the respective measurement signals are monitored. Each is transmitted to the device 9.

  The monitoring device 9 calculates the total demand P by adding the received water amount measurement signals measured by the flow sensors 10-1 to 10-5 of the consumers 3-1 to 3-5 as shown in FIG. The first calculation is performed for the difference calculation and the size comparison calculation between the water supply unit 9-1 and the constant supply water flow rate M supplied to each customer 3-1 to 3-5 through the water supply system 4 from the demand amount P and the water purification plant 2. When the total demand P is always smaller than the constant water supply M supplied from the water purification plant 2 to each of the consumers 3-1 to 3-5 by the first arithmetic unit 9-3. Then, the valve 15 provided in the water supply pipe 14 connected to the supply destination is opened, and the excess supply amount as the difference calculation result is supplied as ship ballast water.

  In this way, even if the water supply capacity of the water purification plant that draws water from the water source specified by the conventional water rights or dam capacity, etc. is operated as it is, the water supply that was not used by the consumers can be used by the ship. By supplying it as ballast water, the equipment utilization rate of the entire system can be increased without any loss, and a system capable of stable water supply can be constructed.

  In addition, although the case where excess supply was supplied as ship ballast water was described, you may make it supply to the new demand destination of multipurpose uses, such as those for disaster prevention, such as other earth environment measures and disaster measures.

  Moreover, in each said embodiment, although the case where water supply was performed with respect to several consumers was described, a single consumer may be sufficient.

The block diagram which shows 1st Embodiment of the water supply system by this invention. The schematic block diagram which shows the water storage tank in the embodiment. The block diagram for demonstrating the arithmetic processing of the monitoring apparatus in the embodiment. The block diagram which shows 2nd Embodiment of the water supply system by this invention. The block diagram for demonstrating the arithmetic processing of the monitoring apparatus in the embodiment. The block diagram which shows 3rd Embodiment of the water supply system by this invention. In the same embodiment, the schematic block diagram of the water storage tank for dividing received water into used water and unused water by the consumer. The block diagram for demonstrating the arithmetic processing of the monitoring apparatus in the embodiment.

Explanation of symbols

  DESCRIPTION OF SYMBOLS 1 ... 1st water source, 2 ... 1st water purification plant, 3-1 to 3-5 ... customer, 4 ... Water supply system, 5 ... Drainage system, 6 ... 2nd water source, 7 ... 2nd water purification plant , 8 ... water storage tank, 9 ... monitoring device, 9-1 ... calculator for calculating total demand P, 9-2 ... calculator for calculating total drainage Q, 9-3 ... first calculator, 9-4 ... Second arithmetic unit, 10-1 to 10-5 ... flow rate sensor for measuring the amount of received water, 11-1 to 11-5 ... flow rate sensor for measuring the amount of drainage, 13 ... water storage tank, 14 ... water supply pipe, 15 ... valve .

Claims (4)

A first water source with a maximum water intake defined, a first water purification plant that purifies water taken from the first water source and supplies a certain amount of water to a single or a plurality of customers through a water supply system; A second water source that is not limited by the amount of water intake, a second water purification plant that purifies the water taken from the second water source and is connected to the water supply system so as to be able to supply water, and a measurement installed at the consumer. A monitoring device that receives a received water amount measurement signal measured by a sensor, monitors the amount of water received by a consumer relative to the amount of water supplied from the first water purification plant, and adjusts the amount of water supplied from the second water purification plant. Prepared,
The monitoring device calculates a total value of the amount of water received by a consumer measured by the measurement sensor as a total demand amount, calculates a difference between the total demand amount and a constant water supply amount from the first water purification plant, Computation means for performing a comparison operation is provided, and when the total comparison amount is larger than the constant water supply amount when the result of comparison of the calculation means is greater than the constant water supply amount, a water supply amount corresponding to the supply shortage amount is supplied from the second water purification plant. A water supply system characterized by regulating. A first water source with a maximum water intake defined, a first water purification plant that purifies water taken from the first water source and supplies a certain amount of water to a single or a plurality of customers through a water supply system; A second water source that is not limited in water intake, a second water purification plant that purifies the water taken from the second water source and is connected to the water supply system so as to be able to supply water, the second water purification plant, A water storage tank provided so that the purified water of the second water purification plant can be replenished between the water supply system and the supply water can flow into and out of the water supply system, and a measurement sensor installed in the consumer A monitoring device that receives a measured amount of received water and receives the amount of water received from a consumer with respect to the amount of water supplied from the first water purification plant and adjusts the amount of water supplied from the second water purification plant;
The monitoring device calculates a total value of the amount of water received by a consumer measured by the measurement sensor as a total demand amount, calculates a difference between the total demand amount and a constant water supply amount from the first water purification plant, When the total demand amount is smaller than the constant water supply amount, the excess supply amount that is the difference calculation result is stored in the water tank, When the total calculation amount is larger than the constant water supply amount when the comparison calculation result is, the supply shortage amount that is the difference calculation result is supplied from the water storage tank to the water supply system, and the water storage amount of the water storage tank is further supplied. A water supply system characterized in that, when the water supply is insufficient, the supply water is supplied from the second water purification plant to the water storage tank and the water supply load of the first water purification plant is leveled and adjusted.   The water supply system according to claim 1 or 2, wherein the second water source is waste water collected from the consumer through a drainage system.   3. The water supply system according to claim 1, wherein the second water source is seawater, and the second water purification plant includes a desalination facility for desalinating seawater taken from the water source. A water supply system characterized in that fresh water purified by water is used as supply water.

Images