JPH06254554A - Fresh water generating, water feeding and hot water feeding system - Google Patents

Abstract

PURPOSE:To provide the fresh water generating, water feeding and hot water feeding system combined with a cogeneration system including all of a fresh water generating stage for obtaining pure water from raw water, such as sea water, a water feeding stage for feeding this water and a hot water feeding stage for feeding the hot water of a prescribed temp. CONSTITUTION:This system has a heat exchanger 32 which heats the raw water, such as sea water, by the recovery of waste heat of a prime mover 20 up to the prescribed permissible temp. of a reverse osmosis membrane device 37 by using city water, etc., the reverse osmosis membrane device 37 which is supplied with the raw water heated by this heat exchanger 32 and forms the pure water by pressurizing the raw water to a prescribed pressure by a pressure pump 36, a heat exchanger 34 which cools the permeated water of the reverse osmosis membrane device 37 to a proper temp. by using the raw water and a latent heat recovering device 24 and heat exchanger 28 having water feed pipes 26, 27, a packed bed 24a and a hot water storage section 24b. The apparatus is provided with the hot water feeding stage for bringing the water supplied from the water feed pipe 26 and the high-heat exhaust gases from the prime mover 20 into contact with each other in the latent heat recovering device 24 in the beginning and once storing the hot water in the hot water storage section 24, then circulating this hot water between the hot water storage section 24, the primary side of the heat exchanger 28 and the water feed pipe 27, obtaining the clean hot water by the heat exchanger 28, storing this hot water into a hot water storage tank and feeding such hot water.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a desalination process for producing raw water from seawater or rivers into pure water, and water supply and hot water supply processes using the water obtained in this desalination process. The present invention relates to a hot water supply system for producing and supplying water, which is configured by integrally combining each process such as the above with a cogeneration system.

[0002]

2. Description of the Related Art As a method for obtaining pure water from seawater or river water, there are known methods that use evaporation, those that use freezing, and those that use a reverse osmosis membrane. Of these, the method of (1) is a technology that has recently been attracting attention as an industrial means for obtaining pure water from not only rivers but also raw water including seawater. For example, Japanese Patent Publication No. 4-63755 is known. Its schematic structure is shown in FIG. 3, the raw water supplied by the pump P ₁ from the raw water tank 1, pressurized and supplied to the reverse osmosis membrane device 2 by a pump P _2, the film surface of the reverse osmosis membrane apparatus 2 In the reverse osmosis membrane device system, in which the permeated water that has permeated is supplied to the permeated water treatment equipment 3 via the water feed pump P _3, and then sent to the equipment 4 using ultrapure water, the raw water tank 1 and the reverse osmosis membrane equipment 2 Between the reverse osmosis membrane device 2 is provided a heat recovery device 7 having a heat exchanger 5 for heating the raw water from the raw water tank 1 and a heat pump 6 for heating the raw water from the heat exchanger 5. Concentrated water and the used product water from the ultrapure water using equipment 4 are supplied to the heat exchanger 5 and the heating side of the evaporator of the heat pump 6 to remove the low temperature exhaust heat of the concentrated water and the used product water. Raw water heated to 25 ° C to 30 ° C by recovery is supplied to the reverse osmosis membrane device 2. It has been configured to. Further, as a hot water supply device using a cogeneration system, there is, for example, the one disclosed in Japanese Patent Laid-Open No. 1-296044, and as shown in FIG. 4, a prime mover 8 accompanied by exhaust gas from a gas engine or the like, its primary side A cooling water heat exchanger 9 using hot water for cooling the prime mover 8 as a heat source, a packed bed 10a formed by stacking packing materials, and a latent heat recovery device 1 having a hot water storage section 10b on the lower bottom.
0, water supply pipe 11 for supplying water to this latent heat recovery device, motor 8
Exhaust pipe 12 for supplying the exhaust gas of the exhaust gas to the latent heat recovery device 10,
An exhaust pipe 13 for discharging exhaust gas from the latent heat recovery device 10,
The hot water stored in the hot water storage part of the latent heat recovery device 10 is reheated by the cooling water heat exchanger 9 and is provided with a path 14 for supplying the hot water for hot water supply. In addition, 15 is an AC generator driven by a prime mover, and 16 and 17 are hot water pumps, respectively.

[0003]

However, the conventional device has the following problems. Since the pure water producing apparatus using the reverse osmosis membrane apparatus shown in FIG. 3 is configured as described above, the heat recovery apparatus 7 is used as compared with the previous one using a large-scale steam boiler as a heat source. Because it is excellent. However, since the heat recovery device 7 is composed of the heat exchanger 5 and the heat pump 6, the heating temperature of the raw water is limited to 30 ° C. as described above, so the temperature characteristics of the reverse osmosis membrane device are limited. There was a problem that it was not used effectively. In addition, it was only provided with water, and not provided with hot water. Further, in the case of the hot water supply device using the cogeneration system shown in FIG. 4, the latent heat recovery device performs exhaust heat recovery with extremely high thermal efficiency, but since tap water is used as the water supply source, There is a problem that it cannot be used in remote areas where it is difficult to obtain abundant tap water. The present invention solves the above problems (problems) of conventional ones, and includes all of a fresh water producing process for obtaining pure water from raw water such as seawater, a water supplying process for supplying the same, and a hot water supplying process for supplying hot water at a predetermined temperature.
It is an object of the present invention to provide a desalination / water supply / hot water supply system configured by efficiently associating these processes with each other.

[0004]

In order to solve the above problems, the fresh water / water supply / hot water supply system of the present invention uses tap water or river water initially prepared in advance to generate power in a cogeneration system. A first heat exchanger that heats raw water such as seawater or river water to a predetermined allowable temperature of a reverse osmosis membrane device described below by recovering exhaust heat of a prime mover accompanied by exhaust gas for driving the device, the first heat A desalination process comprising a pressure pump for pressurizing raw water heated by an exchanger to a predetermined pressure and a reverse osmosis membrane device for supplying permeated water to the raw water at a predetermined temperature pressurized by the pressure pump. A permeated water of the reverse osmosis membrane device obtained in the fresh water producing step is a water feeding step in which raw water is cooled to an appropriate temperature by the second heat exchanger to feed the water, and the first and second upper positions are provided. Water supply pipe. A latent heat recovery device having a packed bed at an intermediate position and a hot water storage part at a lower position and a third heat exchanger are provided, and in the latent heat recovery device, the water originally supplied from the first water supply pipe and the prime mover are connected. After hot water is once stored in the hot water storage part by contacting it with the high heat exhaust gas, the hot water is circulated between the hot water storage part, the primary side of the third heat exchanger and the second water supply pipe, The system was equipped with a hot water supply process in which clean hot water was obtained from a heat exchanger and stored in a hot water storage tank for hot water supply. In this case, it is desirable to provide a filter for filtering organic substances other than heavy metals, bacteria, etc. between the raw water tank and the pressure pump in the above desalination process. Further, when a water storage tank in the above-mentioned water production process is equipped with a level sensor, the water production process is driven when the amount of water in the water storage tank is less than a predetermined value determined in relation to demand, and when the above-mentioned water amount exceeds a predetermined value. Can stop the water production process.
Further, in the water supply step, pure water that has been brought to an appropriate temperature through the second heat exchanger is further sterilized by a sterilizer using an ozone generator or the like to produce drinking water, or industrial water is subjected to secondary treatment. It is desirable to generate and supply water. Further, in the hot water supply process, a temperature control valve is provided for switching paths between the hot water storage tank and the third heat exchanger and between the hot water storage tank and the third heat exchanger, and the temperature of the hot water in the hot water storage tank is less than a predetermined value. When the temperature is high, the water storage tank and the third heat exchanger are communicated with each other, and when the temperature of the hot water in the hot water storage tank exceeds a predetermined value, the hot water storage tank and the third heat exchanger are communicated with each other. It is desirable to switch each route.
Further, pure water from the water supply process and hot water from the hot water supply process can be supplied to the shower chamber. Further, a level sensor is provided in the hot water storage tank in the hot water supply process, and when the hot water amount in the hot water storage tank is less than a predetermined value determined in relation to demand, the hot water supply process is driven, and when the hot water amount becomes equal to or higher than the predetermined value. Can stop the hot water supply process. In addition, it is desirable to drive this system in the order of a fresh water producing process, a water supplying process, and a hot water supplying process. Further, the power source for the power source of each process of the above-mentioned water production, water supply, and hot water supply, and the power source for other incidental equipment are all supplied from the above cogeneration power generator.
It is desirable to be configured integrally with the generation system.

[0005]

In the water production process in the water production / water supply / hot water supply system of the present invention, raw water such as seawater or river water is obtained by utilizing high heat from the engine (for example, hot water at 85 ° C).
As a heat source, the allowable temperature of the reverse osmosis device (for example, 40
The temperature characteristics of the reverse osmosis membrane device are effectively used and the amount of permeated water is significantly increased because the reverse osmosis membrane device is supplied with a predetermined pressure while being constantly heated up to ℃). . In this case, the hot water as the heat source of the reverse osmosis membrane device is initially the water brought to the site or the river water at the site, and the supplementary water thereafter is the water obtained in the desalination process. In the water supply process, the pure water obtained from the reverse osmosis device is stored in the water storage tank and supplied for water supply. In addition,
In this water supply process, the water in the water storage tank can be sterilized to produce drinking water, and the secondary treatment can be performed to produce industrial water. In addition, when a heated raw water is supplied to the reverse osmosis membrane device, a filter is used to properly remove organic substances and the like. Further, in the hot water supply process, the water circulating in the heat exchanger from the water storage tank is warmed to hot water by the circulating hot water supplied from the hot water storage part of the latent heat recovery device, and then stored in the hot water storage tank and used for hot water supply. The latent heat recovery unit uses the water initially supplied from the water storage tank as hot water by direct contact with the exhaust gas of the engine, stores it in the hot water storage unit, and heats the hot water in the hot water storage unit through latent heat through the heat exchanger. The route returning to above the collector is circulated as circulating hot water. When the circulating hot water reaches a predetermined amount, water supply from the water storage tank to the latent heat recovery device is stopped. In addition, the water storage tank and the hot water storage tank are equipped with level sensors that detect the amount of each storage, and the pure water and hot water stored in the water storage tank and the hot water storage tank are operated by this system based on the detection of these sensors. After entering, it is constantly controlled to maintain a predetermined amount.

[0006]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS The present invention will be described in detail below with reference to an embodiment shown in FIGS. In the figure, 20 is a prime mover with exhaust gas from a gas engine, diesel engine, gas turbine, etc., 21 is an oil pan thereof, and 22 is a prime mover 2.
It is a cogeneration power generator such as an AC generator driven by 0. Reference numeral 23 is an exhaust conduit for supplying exhaust heat of exhaust gas of the prime mover 20 to the latent heat recovery unit 24. The latent heat recovery unit 24 is a packing layer 24 formed by stacking packing materials at intermediate positions.
a and a hot water storage portion 24b located on the lower bottom portion. Incidentally, 25 is an exhaust pipe communicating with the position above the packed bed 24a of the latent heat recovery unit 24 and the outside air, and 26 and 27 are water supply pipes each having a shower-shaped faucet at the tip, and these faucets are the latent heat recovery unit 24. Is disposed so as to face the upper position of the filling layer 24a. In addition, L is a level sensor that monitors the amount of hot water in the hot water storage unit 24b and, when detecting that the amount of hot water reaches a predetermined high level (H) or low level (L), outputs a detection signal for them. is there. 28 is a third heat exchanger, and as the arrangement on the primary side thereof, the piping of the circulation path 29 that connects the hot water storage portion 24b of the latent heat recovery unit 24 and the water supply pipe 27 via the latent heat recovery pump P ₃ is used. , A temperature control valve 5 which will be described later via the paths 52 and 52a as the secondary side piping.
0 and the hot water storage tank 48 supplied by the supply pump 51
The piping connected to the path 30 through which the hot water from is circulated is used. Reference numeral 31 is a pipe attached to the exhaust pipe 23, for example, in a jacket shape.
A circulation path 31a connecting the primary side of the first heat exchanger 32 and the radiator 33 by collecting exhaust heat of exhaust gas passing through
Piping is used. Raw water such as seawater or river water is pumped up by the submersible pump 33P to the piping on the secondary side of the heat exchanger 32, and is supplied through the secondary piping of the second heat exchanger 34. ing. In addition, 2 of the heat exchanger 34
The secondary piping will be described later. Reference numeral 35 denotes a filter as a pretreatment, which is provided with a sand filter, a filter layer such as activated carbon, and removes organic substances other than heavy metals such as Ca, Na and Mg in the raw water and impurities such as bacteria. Reference numeral 36 is a pressure pump for pressurization, and by the pump 36, for example, 50 [kg / cm ²
Pressurize the raw water so that the required pressure is about G]. 37
Is a reverse osmosis membrane device, and the pure water obtained by passing through the device 37 is supplied to the secondary side of the heat exchanger 34.
The temperature at which the raw water passing through the secondary side can supply water (for example,
It is cooled to 20 ° C. to 25 ° C., and the permeated water is stored in the water storage tank 38. The concentrated water generated in the reverse osmosis membrane device 37 is discharged to the outside through the path 37a. Reference numeral 39 is a level sensor arranged in the water storage tank 38. Reference numeral 40 is a path composed of a pipe for supplying water from the water storage tank 38, and the path 40 is a cold water supply pump P.
It splits into two via ₁ and one path 41 is latent heat recovery device 2
No. 4, which is connected to the water supply pipe 26 of FIG.
5a, a path 46a for producing drinking water through the sterilizer 46, and a secondary treatment device 4 such as an ultrafiltration membrane device.
It is adapted to be connected to a path 47a for producing industrial water via 7 and to another water supply source. Note that V ₃ is a solenoid valve. 40a is a route connecting the upper end of the water storage tank 38 and the route 41. Routes 41 and 42 are provided in the route 40a.
A chilled water pressure adjusting valve V ₁ for maintaining the above pressure is provided. Reference numerals 43c to 45c are shower faucets arranged in the shower chambers 43 to 45, respectively.
To 45c, cold water from the route 42 and hot water from the hot water storage tank 48 described below from the route 48a to the routes 43, respectively.
It is supplied via b-45b, and shower hot water of an appropriate temperature can be supplied from each faucet 43c-45c.
Reference numeral 48 is a hot water storage tank, 49 is a level sensor arranged in the same tank 48, 50 is a temperature control valve consisting of a three-way valve, 51
Is a supply pump. In addition, the temperature control valve 50 is provided between the path 54-52a connecting the water storage tank 38 and the third heat exchanger 28, and the path 5 connecting the hot water storage tank 48 and the third heat exchanger 28.
It has a function of switching the path between 2-52a by temperature detection. In the hot water storage tank 48, warm water that has been heated by passing through the secondary pipe of the heat exchanger 28 is supplied to and stored in the same tank 48 via paths 30 and 53, and the warm water stored in the same tank 48 is warm water. While being supplied to the shower chambers 43 to 45 by the supply pump P ₂ through the path 48a, the secondary side of the heat exchanger 28 is supplied from the path 52 through the temperature control valve 50, the supply pump 51 and the path 52a. It is circulated to the side pipe. Reference numeral 54 is a replenishment supply path for supplying the initial water and the replenishment water from the water storage tank 38 via the paths 40 and 41, and is connected to the branch path of the temperature control valve 50. Reference numeral 48b is a path connecting the pump P ₂ and the upper portion of the hot water storage tank 48, and the pressure of the path 48a is kept at a predetermined value by inserting the hot water side pressure adjusting valve V ₂ into the path 48b. . Between paths 41 and 52 route 41a for adjustment is provided in the path 41a, the valve V ₄ normally closed state to an open state only during adjustment is provided. In the system diagram of FIG. 1, for simplicity, a raw water tank for temporarily storing raw water, other normally open valves normally provided in the piping of each path, pressure gauges provided before and after the pump 36 for pressurization, Although various elements and control circuits such as a switch for driving and stopping the fresh water production process, the water supply process, and the hot water supply process, and a control circuit for this switch may be formed by using normal elements, they are not shown in the drawing. As a matter of course, these various elements and a control circuit are provided as the device. The above 20 to 54 compose the fresh water / water supply / hot water supply system of the present invention. Although not shown, power for the power source of the system of the present invention and power for other incidental equipment are all supplied from the cogeneration system 22 and integrated with the cogeneration system. It is desirable to configure. In addition, since this system is premised on performing fresh water, water supply, and hot water supply even in remote areas where there is no tap water, when installing this system at such a site, for example, the water storage tank 38 or /
Further, it is desirable that the hot water storage tank 48 stores and transports water as rising tap water and domestic water. Alternatively, local river water may be used as long as it is water for starting up.

In the above structure, as the first step, the water for rising prepared in advance as described above is put into the pipe on the primary side of the heat exchanger 32, and the cogeneration including the prime mover 20 is started. Only the power generation system and the desalination system are driven, and the cogeneration hot water supply system is driven in the next step. That is, when the prime mover 20 is driven and the cogeneration power generator 22 is driven,
The power generator 22 generates and supplies required electric power. on the other hand,
Exhaust gas from the prime mover 20 is supplied to the latent heat recovery unit 24 via an exhaust conduit 23. Therefore, the first heat exchanger 32
The hot water of about 85 ° C., which is obtained by recovering the exhaust heat of the exhaust conduit 23, is circulated on the primary side thereof. On the other hand, the first heat exchanger 32
The raw water such as seawater and river water is on the secondary side of the submersible pump 33P.
Is pumped up and supplied via the primary side of the second heat exchanger 34. Therefore, the raw water that has passed through the first heat exchanger 32 is heated to about 40 ° C., once stored in a raw water tank (not shown), and then supplied to the filter 35,
Filter organic substances other than heavy metals, bacteria, etc.
Via the pressure pump 36, for example, 50 [kg / cm ²
G] is supplied to the reverse osmosis membrane device 37 after being pressurized to a predetermined pressure. Therefore, the pure water which has permeated the membrane surface of the reverse osmosis membrane device 37 is still at a temperature of about 40 ° C., but when passing through the secondary side of the second heat exchanger 34, the pure water of the exchanger 34
It is cooled to fresh water having a temperature of about 20 ° C. to 25 ° C. by the raw water passing through the next side and is temporarily stored in the water storage tank 38. Although not shown in the drawing, the makeup water for the heat exchanger 32 is supplied from the water storage tank 38 as needed.
The amount of water in the water storage tank 38 is monitored by the level sensor 39, and when the amount reaches a predetermined amount, water is supplied to the path 42 by driving the pump P ₁ and the shower chamber 43.
To 45 and drinking water via the sterilizer 46 and industrial water via the secondary treatment device 47. On the other hand, the system of the cogeneration hot water supply system that has been stopped until now is also driven. As the first step of this cogeneration hot water supply process, the solenoid valve V
Open ₃ and drive the cold water supply pump P ₁ to store water 38
The cold water from is supplied to the water supply pipe 26 of the latent heat recovery unit 24 via the paths 40 and 41. Therefore, in the latent heat recovery unit 24, the water from the water supply pipe 26 and the high-temperature exhaust gas come into direct contact with each other, and hot water is stored in the hot water storage unit 24b by a so-called latent heat recovery method. When the amount of warm water in the hot water storage portion 24b becomes equal to or higher than a predetermined high level (H), this is detected by the level sensor L, and the solenoid valve V ₃ is closed based on this detection signal,
The pump P ₃ is driven and the circulating path 29 causes the hot water storage portion 24b.
Hot water of the third heat exchanger 28 and the latent heat recovery unit 24.
It is circulated to another water supply pipe 27 of the. The solenoid valve V
₃ is opened again when the hot water storage portion 24b reaches the low level (L), and the hot water in the hot water storage portion 24b is held between (H) and (L). On the other hand, at this point, the path 52 on the hot water storage tank 48 side
Since there is no warm water in the temperature control valve 50, the temperature control valve 50 is provided with a path for passing in the direction of the path 54 → 52a by the temperature detection.
4, 2 of the heat exchanger 28 via the pump 51 and the path 52a
The hot water is supplied to the secondary side and gradually warmed by the hot water on the primary side of the heat exchanger 28, and the hot water passes through the paths 30 and 53 and the hot water storage tank 4
It is supplied to the tank 8 and stored in the same tank 48. Next, when the temperature of the hot water in the hot water storage tank 48 reaches a predetermined temperature, this is detected by the temperature control valve, and the temperature control valve 50
The route of 54 → 52a is closed and the route of 52 → 52a is switched to the route of 52 → 52a, so that the hot water in the hot water storage tank 48 is circulated to the secondary side of the heat exchanger 28.
Hot water of a predetermined temperature is stored in the hot water storage tank 48.
The hot water in the hot water storage tank 48 is monitored by a level sensor 49, and when the amount reaches a predetermined amount, hot water is supplied from the hot water supply path 48a and the faucet 4 of each of the shower chambers 43 to 45 is supplied.
Hot water is also supplied to 3c to 45c. As described above, in each of the fresh water / water supply / hot water supply system of the present invention, the fresh water production process, then the water supply process, and finally the hot water supply process are activated, and all the systems are in operation. It is to be noted that the level sensor 39 and the level sensor 39 indicate that the demand of each of the above systems has decreased due to fluctuations in the demand side such as holidays and nights, and the amount of stored water and the amount of stored hot water in each of the tanks 38 and 48 have exceeded a predetermined amount. When it is detected by 49, the water production process is stopped by the operation command of the level sensor 39, and the supply pump 51 is stopped by the operation command of the level sensor 49 to temporarily stop the hot water supply system. The amount of hot water and the amount of stored hot water are always automatically adjusted to a predetermined amount. By the way, in the desalination process for producing pure water in the system of the present invention, the raw water is supplied to the reverse osmosis membrane device 3 as described above.
7 is the maximum permissible temperature of the reverse osmosis membrane device 37 before being pressurized and supplied to the heat exchanger 32, for example, 40 ° C.
As shown in FIG. 2, the reverse osmosis membrane device 37 has a temperature characteristic of a reference temperature (25
℃) to obtain the same amount of permeated water, the membrane area is 63%, and if the membrane area is constant, the permeated water amount is 1.59 times the reference temperature, that is, the permeated water amount can be increased by 59%. The first feature of the present invention lies in this point. Also,
The water supply process and hot water supply process in this system perform water supply and hot water storage based on the pure water generated in the above-mentioned water production process, and are therefore suitable for water supply and hot water supply in remote areas without tap water. The point is the second feature of the present invention. further,
Since the water storage tank and the hot water storage tank are each provided with a level sensor, the third embodiment of the present invention is that the water storage amount and the hot water storage amount of each tank can be constantly set to a predetermined amount irrespective of fluctuations in demand. There are features. In addition, the water production process of this system,
Power for the power source for the water supply process and hot water supply process, and the power for other incidental equipment are all supplied from the cogeneration system 22 and are integrated with the cogeneration system, and are separated from each other. A fourth feature of the present invention is that a power source for each system is unnecessary.

[0008]

As described above, the present invention provides a water producing process and a water supplying process using the reverse osmosis membrane device integrally formed with the cogeneration system, and a hot water supplying system using a latent heat recovery device. Since it is a water production, water supply, and hot water supply system that is efficiently combined in association with each other, it has the following excellent effects. First, the water producing process of this system and the supply of pure water obtained in this water producing process have the following effects. (A) The raw water supplied to the reverse osmosis membrane device is heated up to the maximum allowable temperature (for example, 40 ° C.) of the reverse osmosis membrane device by using the cogeneration hot water generator, so that -The amount of permeated water can be significantly increased as compared with the heating temperature (25 ° C to 30 ° C) by the heat recovery device mainly composed of a pump. That is, according to the temperature characteristics of FIG. 2, it is 1.587 / compared with the conventional one using raw water of 30 ° C.
1.176≈1.349, that is, it was confirmed that the permeated water amount could be increased by about 34.9%. Further, as can be seen from the temperature characteristics of FIG. 2, it is fully conceivable that the maximum permissible temperature of the reverse permeable membrane device will be further increased from the present approximately 40 ° C. in the near future. Since it is sufficiently possible to heat the raw water to 40 ° C or higher in the hot water generator, it is possible to further increase the amount of permeated water by warming the raw water as the allowable temperature rises. (B) Further, in the case of the present invention, since the raw water on the supply side to the reverse osmosis device is heated to about 40 ° C., the temperature of the permeated water also rises by that amount to about 40 ° C. Since water is cooled using raw water, it can be cooled without requiring a special cooling source. (C) In addition, before pressurizing the raw water to the reverse osmosis membrane device,
Since the filter 35 removes organic substances and bacteria other than heavy metals and the reverse osmosis membrane device 37 removes heavy metal components, it is possible to efficiently obtain pure water not only by using river water but also by using seawater as raw water. it can. (D) Furthermore, if the permeated water is passed through a sterilizer, it can be used as drinking water, and can be sufficiently used as water for hand washing and showers without sterilization. Further, industrial water can be easily produced by further performing the required secondary treatment. Next, in the water supply process and hot water supply process in this system,
Since water and hot water are supplied on the basis of the pure water generated in the above-mentioned water-producing process, it is suitable for water supply and hot water supply in remote areas without tap water. Further, since the water storage tank and the hot water storage tank are each provided with a level sensor, the water storage amount and the hot water storage amount of each tank can be constantly set to a predetermined amount in response to fluctuations in demand,
Further, when the water supply or hot water supply falls below a predetermined amount, the functions of the fresh water producing process and the hot water supplying process can be stopped at any time to prevent the consumption of extra energy. In addition, power supply for power generation in the system, water supply process, hot water supply process, and other auxiliary equipment are all supplied from the cogeneration power generator 22.
If it is configured integrally with the cogeneration system, a separate power source for each system becomes unnecessary.

[Brief description of drawings]

FIG. 1 is a system diagram including piping showing an embodiment of the present invention.

FIG. 2 is a characteristic diagram of permeation flow velocity correction coefficient-temperature shown for comparing the present invention with a conventional example.

FIG. 3 is a system diagram showing a schematic configuration of a pure water production apparatus using a conventional reverse osmosis membrane apparatus.

FIG. 4 is a system diagram showing a configuration of a hot water supply device that uses tap water as a water supply source by a cogeneration system.

[Explanation of symbols]

 20: prime mover 24: latent heat recovery device 28, 32, 34: heat exchanger 36: pressure pump 37: reverse osmosis membrane device 38: water storage tank 39, 49: level sensor 48: hot water storage tank 50: temperature control valve 51: supply pump

Claims (9)

[Claims] 1. A water production / water supply / hot water supply system comprising a water production process, a water supply process, and a hot water supply process having the following configurations. a. Initially, tap water or river water prepared in advance was used to recover raw water such as seawater and river water by recovering the exhaust heat of the prime mover accompanied by exhaust gas for driving the power generator of the cogeneration system, and the reverse osmosis membrane device described later. First heat exchanger for heating up to a predetermined allowable temperature of, a pressure pump for pressurizing the raw water heated by the first heat exchanger to a predetermined pressure, and raw water of a predetermined temperature pressurized by this pressure pump A desalination process equipped with a reverse osmosis membrane device that is supplied with water and produces permeate. b. The permeated water of the reverse osmosis membrane device obtained in the above desalination process is
A water supply process in which raw water is cooled to an appropriate temperature by the second heat exchanger to supply water. c. Install the first and second water supply pipes in the upper position. A latent heat recovery device having a packed bed at an intermediate position and a hot water storage part at a lower position and a third heat exchanger are provided, and in the latent heat recovery device, the water originally supplied from the first water supply pipe and the prime mover are connected. After contacting hot exhaust gas from the
This hot water is supplied to the hot water storage section and the primary side of the third heat exchanger and the second side.
The hot water supply process in which the hot water is circulated between the water supply pipes, the clean hot water is obtained by the third heat exchanger, and the hot water is stored in the hot water storage tank for hot water supply. 2. The desalination apparatus according to claim 1, wherein a filter for filtering organic substances other than heavy metals, bacteria and the like is provided between the raw water tank and the pressure pump in the desalination process.
Water and hot water supply system. 3. The water storage tank in the water production process is provided with a level sensor, and when the water amount in the water storage tank is less than a predetermined value determined in relation to demand, the water production process is driven so that the water amount is above a predetermined value. The desalination / water supply / hot water supply system according to claim 1 or 2, wherein the desalination process is stopped when the temperature becomes low. 4. In the water supply step, pure water that has been brought to an appropriate temperature through the second heat exchanger is further sterilized by a sterilizer using an ozone generator or the like to produce drinking water, or the pure water is used. The water production / water supply / hot water supply system according to claim 1, wherein the industrial water is generated by a secondary treatment to supply the water. 5. In the hot water supply step, a temperature control valve is provided for switching paths between the water storage tank and the third heat exchanger and between the hot water storage tank and the third heat exchanger, and the temperature of the hot water in the hot water storage tank is set to a predetermined value. When the temperature is lower than the value, the water storage tank and the third heat exchanger are communicated with each other, and when the temperature of the hot water in the hot water storage tank exceeds a predetermined value, the hot water storage tank and the third heat exchanger are communicated with each other. The desalination / water supply / hot water supply system according to claim 1, wherein each path is switched so as to do so. 6. The fresh water / water supply / hot water supply system according to claim 1, wherein pure water from the water supply step and hot water from the hot water supply step are supplied to the shower chamber. 7. A hot water storage tank in the hot water supply process is provided with a level sensor, and when the hot water amount in the hot water storage tank is less than a predetermined value determined in relation to demand, the hot water supply process is driven to set the hot water amount to a predetermined value or more. The hot water supply process is stopped when the temperature rises.
Water and hot water supply system. 8. The water / water supply / hot water supply system according to claim 1, wherein the system is driven in the order of a water supply process, a water supply process, and a hot water supply process. 9. The power source for the power source of each process of the above-mentioned water production, water supply, and hot water supply, and the power source for other incidental equipment are all supplied from the above cogeneration system and integrated with the cogeneration system. Claim 1, which is configured as
Water production / water supply according to any of 2, 4, 5, 6 or 8
Hot water supply system.