Water treatment equipment

Abstract

To provide a water treatment device that can obtain a large amount of purified water without requiring power such as a power source. [Solution] The water treatment device comprises a raw water supply port that takes in raw water pumped from an external raw water supply source, a pretreatment device that filters the raw water taken in from the raw water supply port, a reverse osmosis membrane that purifies the water that has passed through the pretreatment device, a purified water outlet that discharges purified water that has passed through the reverse osmosis membrane, and a concentrated water outlet that discharges concentrated water in which impurities have been concentrated without passing through the reverse osmosis membrane, and obtains purified water from raw water without requiring electricity.

Description

[Technical Field]

[0001] The present invention relates to a water treatment device. [Background technology]

[0002] During disasters, infrastructure such as electricity and water is frequently cut off, and for the purpose of self-help and mutual aid, it is necessary to take measures in the immediate vicinity of homes, neighborhood associations, public facilities, businesses, etc. Among various types of infrastructure, the interruption of the water supply can result in an inability to supply water for daily life or drinking water, which can pose a threat to life, so there is an increasing need for emergency water treatment equipment that can provide large amounts of drinking water and water for daily life. In light of these needs, emergency water treatment devices capable of producing large amounts of drinking water and water for daily use have been developed, including systems that require a separate power source, engine-mounted types, and generator-mounted types (see, for example, Patent Document 1). [Prior art documents] [Patent documents]

[0003] [Patent Document 1] Japanese Patent Application Laid-Open No. 2015-160196 Summary of the Invention [Problem to be solved by the invention]

[0004] These water treatment devices that can produce large amounts of purified water have problems such as the need for power, making them unusable in situations where it is difficult to secure electricity; their large size requires a lot of storage space, making them inconvenient when not in use; and their lack of mobility and portability. Furthermore, special knowledge is required to use them, such as setting them up, making them difficult for local residents who are unfamiliar with the process. Furthermore, water treatment devices equipped with power sources have the problem of high maintenance costs and being difficult to maintain. Furthermore, water treatment devices that use a manual pump to boost pressure, which does not require a power source or other power source, have a very small purification capacity and do not have sufficient treatment capacity to be used as emergency water treatment devices in the event of a disaster.

[0005] The present invention has been made to solve these problems, and an object of the present invention is to provide a water treatment device that can produce a large amount of purified water without requiring power such as an electric power source. [Means for solving the problem]

[0006] In view of the above-mentioned problems, a water treatment device according to an embodiment of the present invention includes a raw water inlet that takes in raw water pumped from an external raw water supply source, a pretreatment device that filters the raw water taken in from the raw water inlet, a reverse osmosis membrane that purifies the water that has passed through the pretreatment device, a purified water outlet that discharges the purified water that has passed through the reverse osmosis membrane, and a concentrated water outlet that discharges concentrated water that has not passed through the reverse osmosis membrane and is thus characterized by producing purified water from raw water without requiring electrical power. With this configuration, the water treatment device can produce a large amount of purified water without requiring power such as an electrical source. The water treatment device may use, for example, an emergency pump truck, a portable fire pump, or a fire hydrant as its raw water supply source.

[0007] The water treatment device may further include a pressure-regulating outlet that discharges a portion of the raw water taken in through the raw water supply inlet without passing through the pretreatment device, a pressure gauge that measures and displays the pressure in the piping between the raw water supply inlet and the pretreatment device, and a flow-regulating valve that adjusts the flow rate of water discharged from the pressure-regulating outlet. This configuration makes it possible to adjust the pressure of the raw water being supplied, preventing shut-off operation that places a load on the raw water supply source.

[0008] The water treatment device may also have a cover that covers at least the reverse osmosis membrane, and the pretreatment device may not be covered by the cover. This configuration allows for easy replacement of the filter material in the prefilter while protecting the reverse osmosis membrane.

[0009] In the present invention, the purified water outlet and the concentrated water outlet may be arranged so that the water discharged from each outlet does not flow in the same direction, thereby reducing the possibility of the concentrated water being used by mistake.

[0010] In the present invention, the water treatment device is preferably placed on the loading surface of a cart with casters so that it does not protrude beyond the loading surface. This configuration makes it easy to push and move the water treatment device, and also reduces the space required when not in use or when loaded onto an emergency pump vehicle or the like for transportation. [Brief explanation of the drawings]

[0011] [Figure 1] 1 is a diagram showing an example of the configuration of a water treatment device 1. FIG. [Figure 2] 1 is a perspective view showing an example of the appearance of a water treatment device 1. FIG. DETAILED DESCRIPTION OF THE INVENTION

[0012] A water treatment device 1 according to an embodiment of the present invention will be described below with reference to the drawings. Fig. 1 is a diagram showing an example of the configuration of a water treatment device 1. Fig. 2 is a perspective view showing an example of the appearance of the water treatment device 1.

[0013] Raw water is supplied to the water treatment device 1 of the present invention at a certain pressure or higher from a raw water supply source external to the device, such as a pump truck, portable fire pump, or fire hydrant. Since only emergency vehicles are mobile in the event of a disaster, it is desirable to use an emergency pump truck as the raw water supply source. The raw water used may include groundwater, river water, lake water, or stockpiled water stored in water storage facilities such as pools or water tanks. The water treatment device 1 is equipped with a reverse osmosis membrane 16, which separates the supplied raw water into purified water from which impurities have been removed and concentrated water containing concentrated impurities, and discharges each.

[0014] As shown in FIG. 1, the water treatment device 1 includes a raw water supply port 11, a supply pressure regulating valve 12, a pressure regulating outlet 13, a prefilter 14, an activated carbon filter 15, a reverse osmosis membrane 16, a purified water outlet 17, a flow rate regulating valve 18, and a concentrated water outlet 19.

[0015] The raw water supply port 11 is a supply port for raw water. The raw water supply port 11 is connected to a raw water supply source outside the device, such as a pump truck, a portable fire pump, or a fire hydrant, via a hose (not shown), and raw water is pumped from the raw water supply source. To facilitate connection to firefighting equipment such as a pump truck, a portable fire pump, or a fire hydrant, the raw water supply port 11 is preferably configured to be able to be fitted with a firefighting intermediary fitting.

[0016] Raw water taken in through raw water supply inlet 11 is supplied to pre-filter 14 via piping. To prevent shut-off operation from placing an excessive load on the power of raw water supply sources such as pump trucks or portable fire pumps, a supply pressure regulating valve 12 is provided to regulate the pressure in the piping between raw water supply inlet 11 and pre-filter 14. That is, the water pressure in the piping between raw water supply inlet 11 and pre-filter 14 (i.e., the raw water supply pressure) is measured and displayed by pressure gauge PM1, and the user adjusts the raw water supply pressure by opening and closing supply pressure regulating valve 12 so that the measurement value of pressure gauge PM1 is an appropriate value (e.g., approximately 0.5 to 1.0 MPa). The raw water (untreated water) that passes through supply pressure regulating valve 12 is discharged from pressure regulating outlet 13.

[0017] The raw water is supplied to a pre-treatment device where it is filtered to remove fine foreign matter, residual chlorine, and other particles that could corrode or damage the reverse osmosis membrane 16. In this example, the pre-treatment device is composed of a pre-filter 14 and an activated carbon filter 15. The pre-filter 14 is a relatively coarse-mesh foreign matter filter that primarily removes foreign matter that has become mixed in the raw water. The activated carbon filter 15 is a substantially cylindrical case that contains fibrous activated carbon, and primarily removes free residual chlorine and chlorine compounds by adsorbing them to the activated carbon. By passing through the pre-filter 14 and the activated carbon filter 15, foreign matter and residual chlorine are removed from the raw water, preventing corrosion or damage to the reverse osmosis membrane 16.

[0018] The reverse osmosis membrane 16 is composed of a first reverse osmosis membrane 16-1 and a second reverse osmosis membrane 16-2. Each of the first reverse osmosis membrane 16-1 and the second reverse osmosis membrane 16-2 has a filter built into a substantially cylindrical case, and the filter has an axial core and a filtration section disposed around the axial core. The filtration section is a thin film (reverse osmosis membrane) wound in multiple layers around the axial core. The reverse osmosis membrane has numerous filtration holes for removing impurities. The first reverse osmosis membrane 16-1 and the second reverse osmosis membrane 16-2 are provided with a water supply section to which the water to be treated discharged from the activated carbon filter 15 is fed, an outlet section to which the filtered permeated water is extracted, and a discharge section to which concentrated water containing the impurities captured by the reverse osmosis membrane is discharged. The first reverse osmosis membrane 16-1 and the second reverse osmosis membrane 16-2 separate water molecules that pass through the reverse osmosis membrane and move to the outlet side from impurities that cannot pass through the reverse osmosis membrane and remain in the outlet side by sending water to be treated from the water supply part at a pressure higher than the osmotic pressure of the reverse osmosis membrane from the water to be treated. The reverse osmosis membrane 16 makes it possible to provide advanced water treatment using the reverse osmosis membrane.

[0019] The water supply port of the first reverse osmosis membrane 16-1 is connected to the discharge port of the activated carbon filter 15, and the water supply port of the second reverse osmosis membrane 16-2 is connected to the discharge port of the first reverse osmosis membrane 16-1. A pressure gauge PM2 is provided in the piping from the activated carbon filter 15 to the first reverse osmosis membrane 16-1 to monitor the water pressure supplied to the first reverse osmosis membrane 16-1. The pressure gauge PM2 allows the user to confirm that the water pressure supplied to the reverse osmosis membrane 16 is sufficient to cause reverse osmosis. The permeated water extracted from the outlet port of the first reverse osmosis membrane 16-1 and the permeated water extracted from the outlet port of the second reverse osmosis membrane 16-2 are combined and discharged from the purified water outlet 17 as purified water by the water treatment device 1. A purified water flow meter FM1 is provided to monitor the flow rate of the purified water.

[0020] Meanwhile, the discharge portion of the second reverse osmosis membrane 16-2 is connected to a concentrated water outlet 19, and the concentrated water discharged from the second reverse osmosis membrane 16-2 is discharged to the outside of the water treatment device 1. A flow rate adjustment valve 18 for adjusting the flow rate of the concentrated water, a pressure gauge PM3 for monitoring the water pressure of the concentrated water, and a concentrated water flow meter FM2 for monitoring the flow rate of the concentrated water are provided in the piping from the discharge portion of the second reverse osmosis membrane 16-2 to the concentrated water outlet 19. The concentrated water discharged from the second reverse osmosis membrane 16-2 may be discharged together with raw water that has passed through the supply pressure adjustment valve 12 and is discharged untreated for pressure adjustment.

[0021] Figure 2 is a perspective view showing an example of the appearance of water treatment device 1 configured as described above. The water treatment device 1 shown in Figure 1 is arranged on a cart 2 provided with casters 21 for movement so as not to protrude from the loading surface (e.g., approximately 600 mm wide x 300 mm deep) of the cart 2. This makes it possible to easily push the water treatment device 1 and also reduces the space required when not in use or when loaded onto a pump truck or the like for movement.

[0022] A cover 3 is provided to at least partially cover the components of the water treatment device 1. For example, as shown in Fig. 2, the cover 3 may cover the first reverse osmosis membrane 16-1 and the second reverse osmosis membrane 16-2, but not the prefilter 14 and the activated carbon filter 15. The filter media of the prefilter 14 and the activated carbon filter 15 need to be replaced relatively frequently, but by leaving the prefilter 14 and the activated carbon filter 15 exposed and not covered by the cover 3, replacement of the filter media becomes easier.

[0023] The raw water supply port 11 and the purified water outlet 17 are preferably provided on one side of the water treatment device 1, and the pressure regulating outlet 13 and the concentrated water outlet 19 are preferably provided on a different side (for example, the lower part of the side opposite the one side), and unpurified water is preferably discharged from a position where it is unlikely to be mistaken for purified water and where the discharged water is unlikely to be used. Such an arrangement reduces the possibility of unpurified water being used by mistake.

[0024] The water treatment device 1 configured as described above is used when the water supply is cut off during a disaster or other water supply outage by connecting the raw water supply port 11 to a raw water supply source such as a pump truck, portable fire pump, or fire hydrant. To avoid placing an excessive load on the raw water supply, the opening of the supply pressure adjustment valve 12 is adjusted so that the water pressure measured and displayed by the pressure gauge PM1 is at an appropriate value. The pressure adjustment outlet 13 and concentrated water outlet 19 are preferably connected to a drain pipe or the like to prevent users from coming into contact with the untreated water or concentrated water. Users consume the treated purified water discharged from the purified water outlet 17. For drinking purposes, a tank for mixing hypochlorite with the purified water is preferably attached.

[0025] The water treatment device 1 according to the embodiment of the present invention described above can produce a large amount of purified water according to the raw water supply capacity of a raw water supply source, such as a pump truck, portable fire pump, or fire hydrant, without requiring any power source such as an electrical source. The water treatment device 1 is capable of advanced water treatment using a reverse osmosis membrane, and can provide purified water with a purity equivalent to that of drinking water or medical use. The water treatment device 1 is mounted on a cart 2 equipped with casters 21 for mobility, so that it does not extend beyond the loading surface of the cart 2. This allows for easy pushing and movement, and also reduces the space required when not in use or when loaded onto a pump truck or the like for transportation. Because only emergency vehicles are available for transportation in the event of a disaster, it is important that the device has dimensions and a shape that make it easy to load onto an emergency pump truck.

[0026] [Modifications of the embodiment] Although the embodiments of the present invention have been described above, the present invention is not limited to these examples.

[0027] For example, in the above embodiment, the reverse osmosis membrane 16 is configured with two stages, the first reverse osmosis membrane 16-1 and the second reverse osmosis membrane 16-2, but depending on the required processing volume and allowable dimensions, the reverse osmosis membrane 16 may be configured with a single stage or three or more stages.

[0028] Furthermore, any combination of the features of the above-described embodiments, in which a person skilled in the art appropriately adds, deletes, or modifies components, falls within the scope of the present invention, as long as it includes the gist of the present invention. [Industrial Applicability]

[0029] The present invention can be suitably used in, for example, a water treatment device. [Explanation of symbols]

[0030] 1. Water treatment equipment 2 carts 3 Cover 11 Raw water supply outlet 12 Supply pressure adjustment valve 13 Pressure adjustment outlet 14 Pre-filter 15 Activated carbon filter 16 Reverse osmosis membrane 16-1 First reverse osmosis membrane 16-2 Second reverse osmosis membrane 17 Purified water outlet 18 Flow control valve 19 Concentrated water outlet PM1, PM2, PM3 pressure gauge FM1 Purified Water Flow Meter FM2 Concentrated Water Flowmeter

Claims

1. a raw water supply port that takes in raw water pumped from an external raw water supply source; a pretreatment device that filters the raw water taken in through the raw water supply port; a reverse osmosis membrane that purifies the water that has passed through the pretreatment device; a purified water outlet for discharging purified water that has passed through the reverse osmosis membrane; a concentrated water outlet for discharging concentrated water in which impurities are concentrated without passing through the reverse osmosis membrane; Equipped with A water treatment device that obtains purified water from raw water without requiring electricity.

2. a pressure regulating outlet that discharges a portion of the raw water taken in from the raw water supply port without passing through the pretreatment device; a pressure gauge that is provided in a pipe between the raw water supply port and the pretreatment device and that measures and displays the supply pressure of the raw water; a supply pressure regulating valve that adjusts the supply pressure of the raw water by adjusting the flow rate of water discharged from the pressure regulating outlet; The water treatment device according to claim 1 , further comprising:

3. a cover that covers at least the reverse osmosis membrane; The water treatment device according to claim 1 , wherein the pretreatment device is not covered by the cover.

4. The water treatment device according to claim 1 , wherein the purified water outlet and the concentrated water outlet are arranged so that the water discharged from each outlet does not flow in the same direction.

5. 2. The water treatment device according to claim 1, which is placed on a loading surface of a dolly having casters so as not to protrude beyond the loading surface.

6. 2. The water treatment device according to claim 1, wherein the raw water supply source is an emergency pump vehicle.

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