JP7587254B2 - Hot water disinfection system - Google Patents

Description

The present invention relates to a system that performs hot water disinfection in cooperation with two or more water treatment devices for producing artificial dialysis water used in dialysis treatment.

Conventionally, water treatment devices that produce water for dialysis have been effectively used in medical facilities such as hospitals. For example, there are large water treatment devices (fixed to a dedicated room) that produce a large amount of water for dialysis for 20 or more patients, and small water treatment devices (equipped with casters or the like so that they can be moved between hospital rooms) that produce a relatively small amount of water for dialysis for around 1 to 2 patients.

[Configuration and Function of Large-Scale Water Treatment Device 50]
Fig. 7 is a schematic diagram of a large-scale water treatment device 50. As shown in Fig. 7, raw water is first stored in a raw water tank 51. A heater 51h is provided inside the raw water tank 51, and heats the temperature of the raw water up to 25°C.

The raw water heated to 25°C is then sent to a pretreatment unit 53 by a raw water pump 52. The pretreatment unit 53 has, in this order, a prefilter 53a, a water softener 53b, and a carbon filter 53c. The prefilter 53a mainly filters out impurities (garbage) in the raw water, the water softener 53b mainly removes calcium ions (Ca2 ⁺ ) and magnesium ions (Mg2 ⁺ ) in the raw water, and the carbon filter 53c mainly removes residual chlorine (total chlorine: free chlorine + combined chlorine) in the raw water.

The raw water that has been pretreated in the pretreatment unit 53 is sent to the RO unit 54 (reverse osmosis membrane treatment device). The RO unit 54 uses the RO pump 54p to supply the pretreated raw water into the RO module 54m. The RO module 54m removes all inorganic ions contained in the raw water. The RO water (about 15-48% of the raw water) that has been treated in the RO module 54m is sent to the RO water supply unit 55, and a portion of the RO wastewater generated by the treatment in the RO module 54m (about 5-80% of the raw water, also called "circulating water") is re-introduced into the RO module 54m via the RO pump 54p, and the other portion (about 5-48% of the raw water, also called "concentrated water") is treated as wastewater.

The RO water supply unit 55 has an RO water tank 55t in which RO water is stored. A UV irradiation device 55u is provided in the RO water tank 55t, so that the RO water can be subjected to UV irradiation treatment. The RO water tank 55t is also provided with an air filter 55f to remove floating bacteria and debris in the outside air that flows in depending on changes in the water level of the RO water in the RO water tank 55t. The RO water tank 55t is also provided with a heater 55h to heat the RO water for hot water disinfection treatment.

The RO water stored in the RO water tank 55t is sent to the UF 57 (ultrafilter, also called "ultrafiltration membrane") via the water supply pump 56. The UF 57 removes biological impurities from the RO water. The RO water from which biological impurities have been removed by the UF 57 is sent to various medical devices for dialysis treatment as dialysis water. In these medical devices, the dialysis water is usually heated to around 36°C and used for various dialysis treatments. After circulating through the medical devices, the dialysis water returns to the UF 58 (ultrafilter, also called "ultrafiltration membrane") and is then returned to the RO water tank 55t.

The housing of the water treatment device 50 is provided with a water supply port 61 for supplying RO water to various medical devices, and a water return port 62 for receiving the water returning from the medical devices to the RO water tank 55t.

The RO water is guided from the RO water tank 55t to the water supply port 61 by the water supply path 63, and the return water is returned from the water supply return port 62 to the RO water tank 55t by the water supply return path 64. In addition, the water supply port 61 and the water supply return port 62 can be short-circuited by the short-circuit path 65 during hot water disinfection.

In addition, a heat exchanger 51e is provided upstream of the raw water tank 51 to use the heat of the RO wastewater to warm the raw water. The heat exchanger 51e also has the function of controlling the temperature of the wastewater to be less than 50°C.

[Disinfection of large water treatment device 50]
The large-scale water treatment device 50 as described above can disinfect the RO water tank 55t, the water supply pump 56, the UF 57, the water supply channel 63, the water supply port 61, the water supply return port 62, the water supply return channel 64, and the UF 58 with hot water.

Specifically, the water supply port 61 and the water return port 62 are short-circuited (directly connected) by the short-circuit path 65 to form a circulation path.

The RO water in the RO water tank 55t is then heated by the heater 55h to become hot water for disinfection at about 80 to 85°C. The hot water is circulated through the circulation path by the water pump 56, thereby carrying out hot water disinfection (during this time, the RO water is not replenished or drained). Hot water disinfection is carried out for, for example, 10 to 30 minutes.

When hot water disinfection is completed, the hot water is drained through the hot water drainage channel 66 branching off from the water supply return channel 64 (the drainage valve 66v on the hot water drainage channel 66 is opened, and the return valve 64v (located between the branch point with the hot water drainage channel 66 and the RO water tank 55t) on the water supply return channel 64 is closed) via the heat exchanger 51e.

[Configuration and Function of Small Water Treatment Device 70]
8 is a schematic diagram of a small water treatment device 70. As shown in FIG. 8, raw water is introduced into a raw water port 71.

The raw water introduced into the raw water port 71 is sent to the pretreatment unit 73. The pretreatment unit 73 has a prefilter 73a and a carbon filter 73c, in that order. The prefilter 73a mainly filters out impurities (debris) in the raw water, and the carbon filter 73c mainly removes residual chlorine (total chlorine: free chlorine + combined chlorine) in the raw water.

The raw water that has been pretreated in the pretreatment unit 73 is sent to the RO unit 74 (reverse osmosis membrane treatment device). The RO unit 74 uses an inverter pump 74p to supply the pretreated raw water into the RO module 74m. The RO module 74m removes all inorganic ions contained in the raw water.

After being processed in the RO module 74m, the RO water (approximately 41-45% of the raw water) is sent to the water supply port 81 via the water supply channel 83 through the UF 77 (ultrafilter, also known as an ultrafiltration membrane). The RO water sent to the water supply port 81 is sent to various medical devices for dialysis treatment as dialysis water. After circulating through the medical devices, the dialysis water returns to the water supply return port 82 and is reintroduced to the upstream side of the inverter pump 74p via the water supply return channel 84.

On the other hand, part of the RO wastewater generated by the treatment in the RO module 74m (approximately 35-50% of the raw water, also called "circulating water") is reintroduced upstream of the inverter pump 74p, and the other part (approximately 56-59% of the raw water, also called "concentrated water") is discharged via the drainage channel 86 to the drainage port 87.

The small water treatment device 70 does not have an RO water tank in which RO water is stored, nor does it have a heater for heating the RO water. Therefore, it cannot perform hot water disinfection like the large water treatment device 50. Instead, a chemical introduction path 75 is provided to which a chemical bottle is connected. The downstream end of the chemical introduction path 75 is connected between the UF 77 and the water supply port 81.

The water supply port 81 and the water supply return port 82 can be short-circuited by a short-circuit path 85 during chemical disinfection. In addition, a drainage junction path 88 branches off midway through the water supply return path 84, and this drainage junction path 88 merges with a drainage path 86.

The raw water port 71, the water supply port 81, the water return port 82, and the drain port 87 are each provided on the front surface of the housing of the water treatment device 70.

[Disinfection of small water treatment device 70]
The small-sized water treatment device 70 as described above can disinfect a part of the water supply channel 83, the water supply port 81, the water supply return port 82, and a part of the water supply return channel 84 with a chemical solution.

Specifically, the water supply port 81 and the water supply return port 82 are short-circuited (directly connected) by the short-circuit path 85, while the drainage opening/closing valve 88v on the drainage junction 88 is opened and the return opening/closing valve 84v on the water supply return path 84 (located between the branch of the drainage junction 88 and the upstream side of the inverter pump 74p) is closed.

Then, the chemical bottle 90 is connected to the chemical introduction path 75, and the chemical is introduced through the chemical introduction path 75 and mixed with the RO water that has been treated in the RO module 74m. A part of the water supply path 83, the water supply port 81, the short-circuit path 85, the water supply return port 82, and a part of the water supply return path 84 (up to the branching point of the drainage junction 88) are disinfected by the passage of the chemical. After disinfection, the chemical passes through the drainage junction 88 and the drainage path 86 and is discharged from the drainage port 87.

For example, a peracetic acid-based chemical can be used as the chemical solution. The amount of chemical solution introduced for each chemical disinfection is about 250 mL, and it can be mixed with RO water at about 1.0 to 1.5 L/min over a period of about 3 to 10 minutes before use.

As a prior art document, the applicant has previously obtained a patent (Patent Document 1). Patent Document 1 discloses an artificial dialysis water production device that improves the energy efficiency of raw water heating.

Patent No. 6725143

Hot water disinfection has a stronger disinfecting effect than chemical disinfection. Hot water disinfection also completely eliminates the risk of chemicals remaining in the device. Therefore, it is desirable to use hot water disinfection rather than chemical disinfection even for small water treatment devices 70.

However, simply adding a hot water disinfection function to each small water treatment device 70 (specifically, providing an RO water tank with a heater, etc.) would be unrealistic due to the large increase in costs.

The inventors have discovered that when a large water treatment device 50 is also used in a facility where a small water treatment device 70 is used, it is possible to perform hot water disinfection on the small water treatment device 70 by modifying at least one of the devices so that they can work together.

The present invention was invented based on the above findings. The object of the present invention is to provide a system that performs hot water disinfection in cooperation with two or more water treatment devices for producing artificial dialysis water used in dialysis treatment.

The present invention relates to
a first raw water tank in which raw water is stored;
a first pretreatment unit that pretreats the raw water in the first raw water tank;
a first RO module that separates the raw water pretreated by the first pretreatment unit into a first RO water and a first RO wastewater using a reverse osmosis membrane;
A heat exchange device for utilizing heat of wastewater including the first RO wastewater to heat raw water;
An RO water tank for storing the first RO water;
A first water supply port for supplying the first RO water to an external device;
a first water return port for receiving a first water return from the external device back to the RO water tank;
a drain receiving port for receiving external device drain from an external device;
A first water supply passage that guides the first RO water from the RO water tank to the first water supply port;
A first water return path that returns the first water return from the first water return port to the RO water tank;
A first drainage merging passage that merges the external device drainage from the drainage receiving port into the first RO drainage on the upstream side or downstream side of the heat exchange device;
A first water supply pump that supplies the first RO water from the RO water tank to the first water supply path;
An RO water heating device provided in the RO water tank;
A first water treatment device having
a second raw water port into which raw water is introduced;
a second pretreatment unit that pretreats the raw water introduced into the second raw water port;
a second RO module that separates the raw water pretreated by the second pretreatment unit into second RO water and second RO wastewater using a reverse osmosis membrane;
a second RO pump that supplies the raw water pretreated by the second pretreatment unit to the second RO module;
A second raw water on-off valve provided between the second pretreatment unit and the second RO pump;
A second water supply port for supplying the second RO water to an external device;
A second water return port for receiving a second water return from the external device back to the upstream side of the second RO pump;
A drain port for draining drainage including the second RO drainage to an external device;
a disinfectant water receiving port for receiving disinfectant water from an external device;
a second water supply passage that guides the second RO water from the second RO module to the second water supply port;
a second water return path that returns the second water return from the second water return port to the upstream side of the second RO pump;
a second drainage channel that guides the second RO drainage from the second RO module to the drainage port;
A second drainage merging path that branches off in the middle of the second water supply return path and merges the second water supply return with the second RO drainage;
A second drainage on-off valve provided in the second drainage junction;
A second disinfection water channel that guides the disinfectant water from the disinfectant water receiving port to the upstream side of the second RO pump;
A second disinfection water on-off valve provided in the second disinfection water passage;
A second water treatment device having
Equipped with
When hot water disinfection is performed in the second water treatment device,
The RO water heating device of the first water treatment device is operated, and the first RO water having a high temperature is guided from the RO water tank to the first water supply port through the first water supply path,
The first water supply port of the first water treatment device is adapted to be connected to the disinfectant water receiving port of the second water treatment device,
The second raw water on-off valve of the second water treatment device is closed,
The second disinfecting water on-off valve of the second water treatment device is opened,
The second water supply port and the second water return port of the second water treatment device are short-circuited,
The hot water disinfection linked system is characterized in that the second drainage on-off valve of the second water treatment device is configured to be closed.

According to the present invention, the high-temperature first RO water of the first water treatment device is supplied to the second water treatment device using the disinfecting water receiving port of the second water treatment device, and can be used for hot water disinfection of the second water treatment device. This makes it possible to disinfect the second water treatment device with hot water without providing a heater or the like in the second water treatment device itself.

In addition, when the hot water disinfection of the second water treatment device is completed, the drainage receiving port of the first water treatment device is connected to the drainage port of the second water treatment device, and the second drainage opening/closing valve of the second water treatment device is opened.

As a result, the configuration for wastewater treatment in the first water treatment device can also be used for wastewater treatment by hot water disinfection in the second water treatment device.

Preferably, the first drainage merging passage is configured to merge the external device drainage from the drainage receiving port with the first RO drainage upstream of the heat exchange device.

As a result, the configuration for exhaust heat recovery provided by the heat exchange device of the first water treatment device can also be used for the treatment of wastewater by hot water disinfection in the second water treatment device.

However, at the time of filing this application, a configuration in which wastewater from hot water disinfection of the second water treatment device is merged downstream of the heat exchange device (e.g., outside the housing of the first water treatment device) is not excluded. In other words, the first wastewater merge path may be configured to merge the external device wastewater from the wastewater receiving port with the first RO wastewater downstream of the heat exchange device.

It is preferable that the second water treatment device has a second housing, and that the second water supply port, the second water supply return port, the disinfectant water receiving port, and the drainage port are provided on the front side of the second housing.

This makes it easy to install and remove various connecting pipes to the second water treatment device.

Also preferably,
During the flushing process of the second water treatment device,
The first water supply passage guides the first RO water, which is not high temperature, from the RO water tank to the first water supply port,
The first water supply port of the first water treatment device is adapted to be connected to the disinfectant water receiving port of the second water treatment device,
The second raw water on-off valve of the second water treatment device is closed,
The second disinfecting water on-off valve of the second water treatment device is opened,
The second water supply port and the second water return port of the second water treatment device are short-circuited,
the drain receiving port of the first water treatment device is adapted to be connected to the drain port of the second water treatment device;
The second drainage on-off valve of the second water treatment device is adapted to be opened.

According to this, the non-high temperature first RO water of the first water treatment device is supplied to the second water treatment device using the disinfectant water receiving port of the second water treatment device, and can be used for the flushing treatment of the second water treatment device. In particular, since the supply water for the flushing treatment (first RO water) is sent to the second RO module without passing through the second pretreatment unit, an effective flushing treatment of the second water treatment device can be performed.

In addition, the first water treatment device, which is a subcombination of the aforementioned inventive concept, is also covered by the patent of this application.

That is, the present invention provides
a first raw water tank in which raw water is stored;
a first pretreatment unit that pretreats the raw water in the first raw water tank;
a first RO module that separates the raw water pretreated by the first pretreatment unit into a first RO water and a first RO wastewater using a reverse osmosis membrane;
A heat exchange device for utilizing heat of wastewater including the first RO wastewater to heat raw water;
An RO water tank for storing the first RO water;
A first water supply port for supplying the first RO water to an external device;
a first water return port for receiving a first water return from the external device back to the RO water tank;
a drain receiving port for receiving external device drain from an external device;
A first water supply passage that guides the first RO water from the RO water tank to the first water supply port;
A first water return path that returns the first water return from the first water return port to the RO water tank;
A first drainage merging passage that merges the external device drainage from the drainage receiving port into the first RO drainage on the upstream side or downstream side of the heat exchange device;
A first water supply pump that supplies the first RO water from the RO water tank to the first water supply path;
An RO water heating device provided in the RO water tank;
The first water treatment device has the following features.

Alternatively, a second water treatment device, which is a subcombination of the above-mentioned inventive concept, is also covered by the patent of this application.

That is, the present invention provides
a second raw water port into which raw water is introduced;
a second pretreatment unit that pretreats the raw water introduced into the second raw water port;
a second RO module that separates the raw water pretreated by the second pretreatment unit into second RO water and second RO wastewater using a reverse osmosis membrane;
a second RO pump that supplies the raw water pretreated by the second pretreatment unit to the second RO module;
A second raw water on-off valve provided between the second pretreatment unit and the second RO pump;
A second water supply port for supplying the second RO water to an external device;
A second water return port for receiving a second water return from the external device back to the upstream side of the second RO pump;
A drain port for draining drainage including the second RO drainage to an external device;
a disinfectant water receiving port for receiving disinfectant water from an external device;
a second water supply passage that guides the second RO water from the second RO module to the second water supply port;
a second water return path that returns the second water return from the second water return port to the upstream side of the second RO pump;
a second drainage channel that guides the second RO drainage from the second RO module to the drainage port;
A second drainage merging path that branches off in the middle of the second water supply return path and merges the second water supply return with the second RO drainage;
A second drainage on-off valve provided in the second drainage junction;
A second disinfection water channel that guides the disinfectant water from the disinfectant water receiving port to the upstream side of the second RO pump;
A second disinfection water on-off valve provided in the second disinfection water passage;
The second water treatment device has a

According to the present invention, the high-temperature first RO water of the first water treatment device is supplied to the second water treatment device using the disinfecting water receiving port of the second water treatment device, and can be used for hot water disinfection of the second water treatment device. This makes it possible to disinfect the second water treatment device with hot water without providing a heater or the like in the second water treatment device itself.

FIG. 2 is a schematic diagram of a first water treatment device of a hot water disinfection linked system according to one embodiment of the present invention. 1 is a schematic diagram of a second water treatment device of a hot water disinfection linked system according to this embodiment. FIG. FIG. 2 is a front view of a second water treatment device of the hot water disinfection linked system according to this embodiment. FIG. 2 is a side view of a second water treatment device of the hot water disinfection linked system according to this embodiment. FIG. 1 is a schematic diagram of a hot water disinfection linkage system according to the present embodiment. FIG. 11 is a schematic diagram of a hot water disinfection linkage system according to another embodiment of the present invention. FIG. 1 is a schematic diagram of a conventional large-scale water treatment device. FIG. 1 is a schematic diagram of a conventional small water treatment device.

The following describes an embodiment of the present invention with reference to the drawings.

[Configuration and Function of First Water Treatment Device 10]
1 is a schematic diagram of a first water treatment device 10 of a hot water disinfection linkage system 100 according to an embodiment of the present invention. As shown in FIG. 1, the first water treatment device 10 of this embodiment further includes a drainage receiving port 27 for receiving external device drainage from an external device, and a drainage merging channel 28 (first discharge merging channel) for merging the external device drainage received at the drainage receiving port 27 with the RO drainage (first RO water) upstream of the heat exchange device 11e. The other configurations are substantially the same as those of a conventional large-scale water treatment device 50.

That is, the raw water is first stored in the raw water tank 11 (first raw water tank). A heater 11h is provided inside the raw water tank 11, and heats the raw water to 25°C.

The raw water heated to 25°C is then sent to a pretreatment unit 13 (first pretreatment unit) by a raw water pump 12. The pretreatment unit 13 has, in this order, a prefilter 13a, a water softener 13b, and a carbon filter 13c. The prefilter 13a mainly filters out impurities (garbage) in the raw water, the water softener 13b mainly removes calcium ions (Ca2 ⁺ ) and magnesium ions (Mg2 ⁺ ) in the raw water, and the carbon filter 13c mainly removes residual chlorine (total chlorine: free chlorine + combined chlorine) in the raw water.

The raw water that has been pretreated in the pretreatment unit 13 is sent to the RO unit 14 (reverse osmosis membrane treatment device). The RO unit 14 uses the RO pump 14p to supply the pretreated raw water into the RO module 14m (first RO module). The RO module 14m removes all inorganic ions contained in the raw water. The RO water (about 15-48% of the raw water) (first RO water) that has been treated in the RO module 14m is sent to the RO water supply unit 15, and a portion of the RO wastewater (first RO wastewater) generated by treatment in the RO module 14m (about 5-80% of the raw water, also called "circulating water") is reintroduced into the RO module 14m via the RO pump 14p, and the other portion (about 5-48% of the raw water, also called "concentrated water") is treated for wastewater.

The RO water supply unit 15 has an RO water tank 15t in which RO water is stored. A UV irradiation device 15u is provided in the RO water tank 15t, so that the RO water can be subjected to UV irradiation treatment. The RO water tank 15t is also provided with an air filter 15f to remove floating bacteria and debris in the outside air that flows in depending on changes in the water level of the RO water in the RO water tank 15t. Furthermore, the RO water tank 15t is provided with a heater 15h (RO water heating device) to heat the RO water for hot water disinfection treatment.

The RO water stored in the RO water tank 15t is sent to the UF 17 (ultrafilter, also called "ultrafiltration membrane") via the water supply pump 16 (first water supply pump). The UF 17 removes biological impurities from the RO water. The RO water from which biological impurities have been removed by the UF 17 is sent to various medical devices for dialysis treatment as dialysis water. In these medical devices, the dialysis water is usually heated to around 36°C and used for various dialysis treatments. After circulating through the medical devices, the dialysis water returns to the UF 18 (ultrafilter, also called "ultrafiltration membrane") and is then returned to the RO water tank 15t.

The housing 10h of the first water treatment device 10 is provided with a water supply port 21 (first water supply port) for supplying RO water (first RO water) to various medical devices, and a water supply return port 22 (first water supply return port) for receiving the water supply return (first water supply return) returning from the medical device to the RO water tank 15t.

The RO water is guided from the RO water tank 15t to the water supply port 21 via a water supply path 23 (first water supply path), and the return water is returned from the water supply return port 22 to the RO water tank 15t via a water supply return path 24 (first water supply return path). In addition, the water supply port 21 and the water supply return port 22 can be short-circuited by a short-circuit path 25 during hot water disinfection.

In addition, a heat exchanger 11e is provided upstream of the raw water tank 11 to use the heat of the RO wastewater (first RO wastewater) to heat the raw water. The heat exchanger 11e also has the function of controlling the temperature of the wastewater to 45°C or less (in some cases, the raw water may be mixed with the RO wastewater as cooling water).

The first water treatment device 10 of this embodiment further includes a wastewater receiving port 27 for receiving external device wastewater from an external device, and a wastewater junction 28 (first discharge junction) that merges the external device wastewater received at the wastewater receiving port 27 with the RO wastewater upstream of the heat exchange device 11e.

[Disinfection of the first water treatment device 10]
The first water treatment device 10 as described above can disinfect the RO water tank 15t, the water supply pump 16, the UF 17, the water supply path 23, the water supply port 21, the water supply return port 22, the water supply return path 24, and the UF 18 with hot water.

Specifically, the water supply port 21 and the water return port 22 are short-circuited (directly connected) by the short-circuit path 25 to form a circulation path.

Then, the RO water in the RO water tank 15t is heated by the heater 15h to become hot water for disinfection at about 80 to 85°C. The hot water is circulated through the circulation path by the water pump 16, thereby carrying out hot water disinfection (during this time, the RO water is not replenished or drained). Hot water disinfection is carried out for, for example, 10 to 30 minutes.

When hot water disinfection is completed, the hot water is drained through the hot water drainage channel 26 branching off from the water supply return channel 24 (the drainage valve 26v on the hot water drainage channel 26 is opened, and the return valve 24v on the water supply return channel 24 (located between the branch point with the hot water drainage channel 26 and the RO water tank 15t) is closed) via the heat exchanger 11e.

During hot water disinfection of the first water treatment device 10, the drainage receiving port 27 and drainage junction 28 (first discharge junction) are not used.

[Configuration and Function of Second Water Treatment Device 30]
2 is a schematic diagram of the second water treatment device 30 of the hot water disinfection linkage system 100 according to one embodiment of the present invention. As shown in FIG. 2, the second water treatment device 30 of this embodiment further includes a disinfectant water receiving port 38 for receiving disinfectant water from an external device, a disinfectant water channel 39 (second disinfectant water channel) that guides the disinfectant water received at the disinfectant water receiving port 38 to the upstream side of the inverter pump 34p, a disinfectant water on-off valve 39v (second disinfectant water on-off valve) provided on the disinfectant water channel 39, and a raw water on-off valve 49 (second raw water on-off valve) provided between the pretreatment unit 33 and the inverter pump 34p. The other configurations are substantially the same as those of the conventional small water treatment device 70.

That is, raw water is introduced into the raw water port 31 (second raw water port). The raw water introduced into the raw water port 31 is sent to the pretreatment unit 33 (second pretreatment unit). The pretreatment unit 33 has a prefilter 33a and a carbon filter 33c, in that order. The prefilter 33a mainly filters out impurities (debris) in the raw water, and the carbon filter 33c mainly removes residual chlorine (total chlorine: free chlorine + combined chlorine) in the raw water.

After pretreatment in the pretreatment unit 33, the raw water is sent to the RO unit 34 (reverse osmosis membrane treatment device). The RO unit 34 uses an inverter pump 34p (second RO pump) to supply the pretreated raw water to the RO module 34m (second RO module). The RO module 34m removes all inorganic ions contained in the raw water.

After being processed in the RO module 34m, the RO water (approximately 41-45% of the raw water) (second RO water) is sent to the water supply port 41 (second water supply port) via the water supply channel 43 (second water supply channel) through the UF 37 (ultrafilter, also called "ultrafiltration membrane"). The RO water sent to the water supply port 41 is sent to various medical devices for dialysis treatment as dialysis water. After circulating through the medical devices, the dialysis water returns to the water supply return port 42 (second water supply return port) and is reintroduced to the upstream side of the inverter pump 34p via the water supply return channel 44 (second water supply return channel).

On the other hand, a portion of the RO wastewater (second RO wastewater) generated by processing in the RO module 34m (approximately 35-50% of the raw water, also called "circulating water") is reintroduced upstream of the inverter pump 74p, and the other portion (approximately 56-59% of the raw water, also called "concentrated water") is discharged via the drainage channel 46 (second drainage channel) to the drainage port 47.

The second water treatment device 30 does not have an RO water tank in which RO water is stored, and does not have a heater for heating the RO water. Therefore, it cannot perform hot water disinfection like the first water treatment device 10 by itself. Instead, a chemical solution introduction path 35 to which a chemical solution bottle is connected may be provided. The downstream end of the chemical solution introduction path 35 may be connected between the UF 37 and the water supply port 41. The water supply port 41 and the water supply return port 42 may be short-circuited by the short-circuit path 45 during chemical disinfection.

In addition, in the second water treatment device 30, regardless of whether or not the chemical solution introduction path 35 is provided, a drainage junction 48 (second drainage junction) branches off midway through the water supply return path 44, and the drainage junction 48 merges with the drainage path 46 (second drainage path).

The second water treatment device 30 of this embodiment further includes a disinfectant water receiving port 38 for receiving disinfectant water from an external device, a disinfectant water passage 39 (second disinfectant water passage) that guides the disinfectant water received at the disinfectant water receiving port 38 to the upstream side of the inverter pump 34p, a disinfectant water on-off valve 39v (second disinfectant water on-off valve) provided on the disinfectant water passage 39, and a raw water on-off valve 49 (second raw water on-off valve) provided between the pre-treatment unit 33 and the inverter pump 34p.

The raw water port 31, the disinfectant water receiving port 38, the water supply port 41, the water supply return port 42, and the drain port 47 are each provided on the front surface of the housing 30h of the second water treatment device 30. Figure 3 is a front view of the second water treatment device 30 of this embodiment, and Figure 4 is a side view of the second water treatment device 30 of this embodiment.

[Chemical Disinfection in the Second Water Treatment Device 30]
When the chemical liquid introduction path 35 is provided, a part of the water supply path 43, the water supply port 41, the water supply return port 42, and a part of the water supply return path 44 can be disinfected with the chemical liquid.

Specifically, the water supply port 41 and the water supply return port 42 are short-circuited (directly connected) by the short-circuit path 45, while the drainage opening/closing valve 48v on the drainage junction 48 is opened and the return opening/closing valve 44v on the water supply return path 44 (located between the branch of the drainage junction 48 and the upstream side of the inverter pump 34p) is closed.

Then, the chemical solution bottle 90 is connected to the chemical solution inlet path 35, and the chemical solution is introduced through the chemical solution inlet path 35 and mixed with the RO water that has been treated in the RO module 34m , and a part of the water supply path 43, the water supply port 41, the short-circuit path 45, the water supply return port 42, and a part of the water supply return path 44 (up to the branching part of the drainage junction path 48) are disinfected by the passage of the chemical solution. The disinfected chemical solution passes through the drainage junction path 48 and the drainage path 46 and is discharged from the drainage port 47.

For example, a peracetic acid-based chemical can be used as the chemical solution. The amount of chemical solution introduced for each chemical disinfection is about 250 mL, and it can be mixed with RO water at about 1.0 to 1.5 L/min over a period of about 3 to 10 minutes before use.

[Hot water disinfection in the second water treatment device 30]
If cooperation with the first water treatment device 10 is possible, the inverter pump 34p, RO module 34m, UF 37, water supply channel 43, water supply port 41, water supply return port 42, and water supply return channel 44 can be disinfected with hot water.

Specifically, the water supply port 41 and the water return port 42 are short-circuited (directly connected) by the short-circuit path 45 to form a circulation path.

On the other hand, as shown in Figures 3 to 5, the water supply port 21 of the first water treatment device 10 and the disinfectant water receiving port 38 of the second water treatment device 30 are connected via a connecting pipe, and the wastewater receiving port 27 of the first water treatment device 10 and the wastewater port 47 of the second water treatment device 30 are connected via a connecting pipe. Figure 5 is a schematic diagram of the hot water disinfection linkage system 100 according to this embodiment.

Then, the RO water (first RO water) in the RO water tank 15t of the first water treatment device 10 is heated by the heater 15h (RO water heating device) to become hot water for disinfection at about 80 to 85°C. The hot water is sent to the water supply port 21 through the water supply path 23 by the water supply pump 16, and sent to the disinfection water receiving port 38 of the second water treatment device 30 through the connecting pipe. Here, the raw water on-off valve 49 (second raw water on-off valve) is closed and the disinfection water on-off valve 39v (second disinfection water on-off valve) is opened, so that the hot water is supplied into the circulation path of the second water treatment device 30. This allows the hot water disinfection of the second water treatment device 30 to be performed (after a predetermined amount of hot water is supplied into the circulation path, hot water is not replenished (the disinfection water on-off valve 39v is closed) and is not drained). Hot water disinfection is performed for, for example, 10 to 30 minutes.

When hot water disinfection is completed, the drainage opening/closing valve 48v on the drainage junction 48 is opened, and the return opening/closing valve 44v on the water supply return path 44 is closed. As a result, the hot water after disinfection is discharged from the drainage port 47 through the drainage junction 48 and the drainage path 46, and is sent to the drainage receiving port 27 of the first water treatment device 10 via the connecting piping.

In the first water treatment device 10, the wastewater (hot water) received at the wastewater receiving port 27 is heat exchanged (heat exhaust treatment) by the heat exchange device 11e and then drained.

[Flushing process of second water treatment device 30]
If cooperation with the first water treatment device 10 is possible, the driving force of the water supply pump 16 of the first water treatment device 10 (e.g., 3 L/min or more, 0.2 MPa) can also be used to perform flushing processing of the RO module 34m of the second water treatment device 30.

Specifically, as in hot water disinfection, the water supply port 41 and the water return port 42 are short-circuited (directly connected) by the short-circuit path 45 to form a circulation path.

Then, as in the case of hot water disinfection, the water supply port 21 of the first water treatment device 10 and the disinfectant water receiving port 38 of the second water treatment device 30 are connected via a connecting pipe, and the wastewater receiving port 27 of the first water treatment device 10 and the wastewater port 47 of the second water treatment device 30 are connected via a connecting pipe.

Meanwhile, just as when hot water disinfection is completed, the drainage opening/closing valve 48v on the drainage junction 48 is opened, and the return opening/closing valve 44v on the water supply return path 44 is closed.

The RO water in the RO water tank 15t of the first water treatment device 10 is then sent by the water pump 16 through the water supply passage 23 to the water supply port 21, and sent through the connecting piping to the disinfectant water receiving port 38 of the second water treatment device 30. Here, the raw water on-off valve 49 (second raw water on-off valve) is closed, and the disinfectant water on-off valve 39v (second disinfectant water on-off valve) is opened, so that the RO water passes through the inverter pump 34p (set to a non-driven state) and is sent to the RO module 34m. This performs a flushing process for the RO module 34m of the second water treatment device 30.

After flushing, the RO water is discharged from the drain port 47 via the drain junction 48 and drain 46, and sent to the drain receiving port 27 of the first water treatment device 10 via the connecting pipe.

[Effects of this embodiment]
As described above, according to the hot water disinfection linked system 100 of the present embodiment, the high-temperature RO water (first RO water) from the first water treatment device 10 is supplied to the second water treatment device 30 by using the disinfecting water receiving port 38 of the second water treatment device 30, and can be used for hot water disinfection of the second water treatment device 30. This allows the second water treatment device 30 to be disinfected with hot water without providing a heater or the like in the second water treatment device 30 itself.

When hot water disinfection is completed, the drainage opening/closing valve 48v (second drainage opening/closing valve) on the drainage junction 48 is opened, the return opening/closing valve 44v on the water supply return path 44 is closed, and the hot water after disinfection is discharged from the drainage port 47 through the drainage junction 48 and the drainage path 46 and sent to the drainage receiving port 27 of the first water treatment device 10 via the connecting piping. This allows the heat exchange device 11e (configuration for drainage treatment) of the first water treatment device 10 to be used for treating drainage by hot water disinfection in the second water treatment device 30 as well.

In addition, according to the hot water disinfection linkage system 100 of this embodiment, the raw water port 31, the disinfectant water receiving port 38, the water supply port 41, the water supply return port 42, and the drainage port 47 are provided on the front surface of the housing 30h of the second water treatment device 30, so that the installation and removal of various connection pipes (which may be arranged to run along the corridors of a medical facility, etc.) to the second water treatment device 30 can be easily performed.

In addition, various valves of the second water treatment device 30 (disinfecting water on-off valve 39v, return on-off valve 44v, drainage on-off valve 48v, raw water on-off valve 49) may be controlled on the side of the first water treatment device 10. In this case, for example, the control panel of the first water treatment device 10 may be connected to the control line port 30e of the second water treatment device 30 via a wired cable (which may be arranged to run in a corridor of a medical facility, etc.) or the like (see FIG. 3).

In addition, according to the hot water disinfection linkage system 100 of this embodiment, the RO water (first RO water) of the first water treatment device 10 is supplied to the second water treatment device 30 using the disinfectant water receiving port 38 of the second water treatment device 30, and can also be used for flushing treatment of the RO module 34m of the second water treatment device 30. Since the supply water for flushing treatment (first RO water) is sent to the RO module 34m (second RO module) without passing through the pretreatment unit 33 (second pretreatment unit), effective flushing treatment of the second water treatment device 30 can be performed.

[Other embodiments]
In the embodiment described above, the drainage merging path 28 (first drainage merging path) is configured to merge the external device drainage (drainage of the second water treatment device 030) with the RO drainage (first RO drainage) upstream of the heat exchange device 11e, but may be configured to merge with the RO drainage (first RO drainage) downstream of the heat exchange device 11e. For example, as shown in FIG. 6, a drainage receiving port 27' is provided on the outside of the housing 10h of the first water treatment device 10', and the drainage merging path 28' may be configured to merge the external device drainage (drainage of the second water treatment device 30) with the RO drainage (first RO drainage) outside the housing 10h of the first water treatment device 10' (downstream of the heat exchange device 11e).

In both the examples of Figures 5 and 6, the wastewater temperature is monitored by a temperature sensor 11t, and raw water is mixed with the RO wastewater (first RO wastewater) as cooling water as necessary.

10, 10' First water treatment device 10h Housing 11 Raw water tank 11e Heat exchange device 11h Heating heater 11t Temperature sensor 12 Raw water pump 13 Pretreatment unit 13a Prefilter 13b Water softener 13c Carbon filter 14 RO unit 14m RO module 14p RO pump 15 RO water supply unit 15f Air filter 15h Heater 15t RO water tank 15u UV irradiation device 16 Water supply pump 21 Water supply port 22 Water supply return port 23 Water supply path 24 Water supply return path 24v Return opening and closing valve 25 Short circuit 26 Hot water drainage path 26v Drainage opening and closing valve 27, 27' Drainage receiving port 28, 28' Drainage junction path 30 Second water treatment device 30e Control line port 30h Housing 31 Raw water port 33 Pretreatment unit 33a Prefilter 33c Carbon filter 34 RO unit 34m RO module 34p Inverter pump 35 Chemical solution introduction path 38 Disinfecting water receiving port 39 Disinfecting water path 39v Disinfecting water on/off valve 41 Water supply port 42 Water supply return port 43 Water supply path 44 Water supply return path 44v Return on/off valve 45 Short circuit 46 Drain path 47 Drain port 48 Drain junction path 48v Drain on/off valve 49 Raw water on/off valve 50 Water treatment device 51 Raw water tank 51e Heat exchanger 51h Heater for heating 52 Raw water pump 53 Pretreatment unit 53a Prefilter 53b Water softener 53c Carbon filter 54 RO unit 54m RO module 54p RO pump 55 RO water supply unit 55f Air filter 55h Heater 55t RO water tank 55u UV irradiation device 56 Water supply pump 61 Water supply port 62 Water supply return port 63 Water supply channel 64 Water supply return channel 64v Return on/off valve 65 Short circuit 66 Hot water drain channel 66v Drain on/off valve 70 Water treatment device 71 Raw water port 73 Pretreatment unit 73a Prefilter 73c Carbon filter 74 RO unit 74m RO module 74p Inverter pump 75 Chemical solution introduction channel 81 Water supply port 82 Water supply return port 83 Water supply channel 84 Water supply return channel 84v Return on/off valve 85 Short circuit 86 Drain channel 87 Drain port 88 Drain junction channel 88v Drain on/off valve 90 Chemical solution bottles 100, 100' Hot water disinfection linked system

Claims (6)

a first raw water tank in which raw water is stored;
a first pretreatment unit that pretreats the raw water in the first raw water tank;
a first RO module that separates the raw water pretreated by the first pretreatment unit into a first RO water and a first RO wastewater using a reverse osmosis membrane;
A heat exchange device for utilizing heat of wastewater including the first RO wastewater to heat raw water;
An RO water tank for storing the first RO water;
A first water supply port for supplying the first RO water to an external device;
a first water return port for receiving a first water return from the external device back to the RO water tank;
A first water treatment device having
a second raw water port into which raw water is introduced;
a second pretreatment unit that pretreats the raw water introduced into the second raw water port;
a second RO module that separates the raw water pretreated by the second pretreatment unit into second RO water and second RO wastewater using a reverse osmosis membrane;
a second RO pump that supplies the raw water pretreated by the second pretreatment unit to the second RO module;
A second raw water on-off valve provided between the second pretreatment unit and the second RO pump;
A second water supply port for supplying the second RO water to an external device;
A second water return port for receiving a second water return from the external device back to the upstream side of the second RO pump;
A drainage port for draining wastewater including the second RO wastewater to the first water treatment device ;
A second water treatment device having
Equipped with
The first water treatment device further includes:
a drain receiving port for receiving drainage from the second water treatment device ;
A first water supply passage that guides the first RO water from the RO water tank to the first water supply port;
A first water return path that returns the first water return from the first water return port to the RO water tank;
A first wastewater merging passage that merges wastewater from the second water treatment device from the wastewater receiving port into the first RO wastewater on the upstream side or downstream side of the heat exchanger;
A first water supply pump that supplies the first RO water from the RO water tank to the first water supply path;
An RO water heating device provided in the RO water tank;
It has
The second water treatment device further includes:
a disinfectant water receiving port for receiving disinfectant water from the first water treatment device ;
a second water supply passage that guides the second RO water from the second RO module to the second water supply port;
a second water return path that returns the second water return from the second water return port to the upstream side of the second RO pump;
a second drainage channel that guides the second RO drainage from the second RO module to the drainage port;
A second drainage merging path that branches off in the middle of the second water supply return path and merges the second water supply return with the second RO drainage;
A second drainage on-off valve provided in the second drainage junction;
A second disinfection water channel that guides the disinfectant water from the disinfectant water receiving port to the upstream side of the second RO pump;
A second disinfection water on-off valve provided in the second disinfection water passage;
A second water treatment device having
Equipped with
When hot water disinfection is performed in the second water treatment device,
The RO water heating device of the first water treatment device is operated, and the first RO water having a high temperature is guided from the RO water tank to the first water supply port through the first water supply path,
The first water supply port of the first water treatment device is adapted to be connected to the disinfectant water receiving port of the second water treatment device,
The second raw water on-off valve of the second water treatment device is closed,
The second disinfecting water on-off valve of the second water treatment device is opened,
The second water supply port and the second water return port of the second water treatment device are short-circuited,
A hot water disinfection linked system, characterized in that the second drainage on-off valve of the second water treatment device is configured to be closed. At the end of the hot water disinfection in the second water treatment device,
the drain receiving port of the first water treatment device is adapted to be connected to the drain port of the second water treatment device;
The hot water disinfection linked system according to claim 1 , wherein the second drainage opening/closing valve of the second water treatment device is configured to be opened. The hot water disinfection linkage system described in claim 1 or 2, characterized in that the first wastewater merging path is configured to merge wastewater from the second water treatment device from the wastewater receiving port into the first RO wastewater upstream of the heat exchanger. The hot water disinfection linkage system described in claim 1 or 2, characterized in that the first wastewater merging path is configured to merge the wastewater from the second water treatment device from the wastewater receiving port into the first RO wastewater downstream of the heat exchanger. The second water treatment device has a second housing,
A hot water disinfection linkage system as described in any one of claims 1 to 4, characterized in that the second water supply port, the second water supply return port, the disinfectant water receiving port and the drainage port are provided on the front side of the second housing. During the flushing process of the second water treatment device,
The first water supply passage guides the first RO water, which is not high temperature, from the RO water tank to the first water supply port,
The first water supply port of the first water treatment device is adapted to be connected to the disinfectant water receiving port of the second water treatment device,
The second raw water on-off valve of the second water treatment device is closed,
The second disinfecting water on-off valve of the second water treatment device is opened,
The second water supply port and the second water return port of the second water treatment device are short-circuited,
the drain receiving port of the first water treatment device is adapted to be connected to the drain port of the second water treatment device;
The hot water disinfection linked system according to any one of claims 1 to 5, wherein the second drainage on-off valve of the second water treatment device is configured to be opened.

Images