JP2018069169A - Portable water purifying treatment device capable of connecting with ro membrane unit - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a portable water purifying device configured to be able to choose, in accordance with a raw water quality situation, between an operation utilizing only a filtration membrane module and an operation utilizing both the filtration membrane module and an RO membrane module, being capable of preventing unnecessary operation cost and further enabling a stable continuous operation in the middle and long terms.SOLUTION: A portable water purifying treatment device 1 capable of connecting with an RO membrane unit 3 comprises an injecting facility of sodium hypochlorite for disinfection 19 in a membrane unit 2, for a case that water is supplied only to the membrane unit 2; and is configured to supply water through a supplying line of water to be treated 52 of the RO membrane unit 3 into the RO membrane unit 3 in a connected state to the membrane unit 2 so that the sodium hypochlorite for disinfection is injected from the injecting facility of sodium hypochlorite 19 to the RO membrane unit 21 in the membrane unit 2, for a case that the membrane unit 2 connects with the RO membrane unit 3.SELECTED DRAWING: Figure 2

Description

  The present invention is a portable water purification system in which raw water is subjected to membrane filtration with a filtration membrane module using a microfiltration membrane or an ultrafiltration membrane, and then the filtrate is subjected to reverse osmosis membrane treatment with a reverse osmosis membrane module having a reverse osmosis membrane. The present invention relates to an apparatus and an operation method thereof.

  If water treatment facilities and water pipes that supply domestic water, including drinking water, are damaged due to earthquakes, storms and floods, etc., emergency water supply with water trucks will be used in the short term. However, depending on the scale of the damage, it may take several months or a year or more to recover, so there is a limit in terms of both labor and cost for the emergency water supply in the medium to long term using a water truck. There is.

  In such a case, obtaining raw water from the nearest river, lake, etc. and dealing with a portable, emergency water purifier can be an effective means because a large amount of water can be easily secured. In such a water purifier, a membrane filtration method is used in which impurities in raw water are filtered and removed by a membrane to produce purified water. The substance to be filtered of the membrane varies depending on the type of the membrane, but in the case of a microfiltration membrane (hereinafter referred to as MF membrane) or an ultrafiltration membrane (hereinafter referred to as UF membrane), a suspended substance, Bacteria, protozoa, colloidal substances and the like can be removed by filtration. In the case of a reverse osmosis membrane (hereinafter referred to as RO membrane), soluble organic substances, viruses, ionic substances, and the like can be removed by filtration.

  As a portable water purifier using such a membrane filtration method, for example, in Patent Document 1, water having a low salinity concentration uses a membrane permeation at a low pressure, and raw water is used as river water or pool water. Disclosed is a mobile water purifier with a compact device, which can be operated at low pressure by limiting to fresh water, omits complicated pretreatment filters, and purifies raw water using only RO membrane modules. ing.

  Patent Document 2 discloses an emergency purifying apparatus configured to perform pretreatment with a water purifier using a nonwoven fabric filter and an activated carbon filter, and to remove minute organic substances and turbidity components by a filtration membrane module using an MF membrane in the final stage. Is disclosed.

  In Patent Document 3, after a flocculant is added to raw water and pretreatment is performed with a rotating cylindrical filter, fine turbidity, bacteria, etc. are removed with a filtration membrane module using an MF membrane or a UF membrane. A mobile water purification facility that removes bacteria, viruses, harmful organic substances, and the like with an RO membrane module using an RO membrane is disclosed.

  In Patent Document 4, in order to reduce the size of the apparatus, the treated water of the pretreatment filter is not stored in a tank and used for backwashing of the pretreatment filter. A water treatment system for producing drinking water that uses high-pressure concentrated water as backwash water for a pretreatment filter without using a water storage tank and a pump is disclosed.

  Patent Document 5 includes a filtration membrane module that uses an MF membrane or a UF membrane as a pretreatment filter, and an RO membrane module that uses an RO membrane, detects the state of the device in the water purification process, and on the surface of the RO membrane. A water purifier that automatically cleans the surface of the RO membrane when it is determined that clogging has occurred and the purification function of the raw water has deteriorated is disclosed.

JP-A-8-309349 Japanese Patent No. 4638712 Japanese Patent No. 2755182 JP 2007-181822 A Japanese Patent Laying-Open No. 2015-188767

  However, since the mobile water purification apparatus of Patent Document 1 does not include a pretreatment filter such as a filtration membrane module using an MF membrane or a UF membrane, raw water is filtered only by the RO membrane module. Further, suspended substances and bacteria that are not subject to filtration of the RO membrane module are also filtered, and the RO membrane surface is easily clogged. Furthermore, the device is configured on the premise that the contaminated RO membrane module is replaced without a means for recovering the decrease in filtration capacity due to the contamination of the RO membrane module included in the normal RO membrane device. In the medium to long term, stable operation cannot be performed. In addition, frequent replacement of the RO membrane is necessary, leading to an increase in operating costs. Furthermore, since there is no mechanism for adding a bactericidal agent to the permeated water that has been reverse osmosis membrane treated with the RO membrane, there is a possibility that sanitary problems may occur as drinking water after water supply.

  Since the emergency purification apparatus described in Patent Document 2 does not include an MF membrane filter backwash mechanism, the filter needs to be replaced when the MF membrane filter is clogged and the filtration capacity is reduced. Stable and continuous operation is not possible. Since the RO membrane module is not provided, soluble organic substances, viruses, and ionic substances cannot be removed. Therefore, depending on the quality of raw water, purified water to be supplied may not be suitable for drinking.

  The mobile water purification facility described in Patent Document 3 has a complex and large-scale configuration of the mobile water purification device, so the equipment scale is large enough to be mounted on a truck. There is a possibility that the water purification equipment cannot reach the site.

  Since the water treatment system for drinking water production described in Patent Document 4 is configured to backwash the pretreatment filter configured using the MF membrane or the UF membrane with the high-pressure concentrated water of the RO membrane module, the microorganisms in the pretreatment filter Can be killed by osmotic shock, but organic substances such as humic substances and microorganism-derived proteins cannot be decomposed and removed, so the pretreatment filter is clogged prematurely and the filtration performance decreases. A fouling problem occurs. For this reason, since it is necessary to replace the pretreatment filter as needed, it is not suitable for stable operation in the medium to long term, and the replacement of the pretreatment filter causes an increase in operating cost.

  When the surface of the RO membrane is clogged and the purification function of the raw water is reduced, the water purification device described in Patent Document 5 automatically cleans the surface of the RO membrane and restores the purification function of the RO membrane. However, since there is no mechanism for backwashing the filtration membrane module using the MF membrane or UF membrane used as the pretreatment filter, the filtration performance of the pretreatment filter is lowered, so it is stable over the medium to long term. Not suitable for continuous use. In addition, frequent replacement of the pretreatment filter is required, resulting in an increase in operating cost.

  Therefore, the present invention has been developed to solve the above-described problems, and the object of the present invention is an operation using only a filtration membrane module, a filtration membrane module and an RO membrane according to the quality of raw water. It is configured to be able to select the operation using both modules, and it can prevent unnecessary operation costs, and can be operated stably in the medium to long term. It is an object of the present invention to provide a portable water purifier that is easy to select a transportation and installation place and can supply safe water suitable for drinking.

  In order to achieve the above object, the invention according to claim 1 is directed to a portable membrane unit, an MF or UF membrane module having a water intake line on the primary side and a filtrate water line on the secondary side, and the filtration. A backwash water tank that flows in from the backwash water line connected to the water line, an outflow line that flows out from the backwash water tank through the backwash pump to the membrane module, and backwash water is injected into the backwash water tank. In addition, when the membrane unit is supplied with water only, a sub-injection facility for injecting disinfection sub-aqueous sublimation is provided. When the RO membrane unit is connected to the membrane unit, the backwash water tank and the RO membrane are provided. In addition to having a line connecting portion that can be connected to the inflow line of the unit, the RO membrane unit water supply line of the membrane unit is connected to be injected so that sterilization sub-aqueous is injected from the sub-injection facility. RO membrane A portable water treatment device connectable to RO membrane unit, characterized by being configured so as to feed water from Tsu City of treated water line.

  When the invention according to claim 2 is used only with the membrane unit, a supply water line for the membrane unit is provided in the filtrate water line, while the RO membrane unit can be connected to the membrane unit. A portable water treatment apparatus capable of connecting an RO membrane unit having a water supply connection portion for connecting the treated water line and an RO membrane unit water supply line.

  According to a third aspect of the present invention, the RO membrane unit includes an RO membrane unit controller, and when the membrane unit and the RO membrane unit are connected, the RO membrane unit controller and the membrane unit controller. Is a portable water purification apparatus capable of connecting an RO membrane unit that is recognized in a state where and are electrically connected.

  According to a fourth aspect of the present invention, when the RO membrane unit is connected, the hypo-injection facility operates only in the water supply process of the treated water line of the RO membrane unit or the storage process of the backwash water tank. This is a portable water purification apparatus that can be connected to the RO membrane unit.

  The invention which concerns on Claim 5 is a portable water purification apparatus which can connect the RO membrane unit which serves as a buffer tank which makes the said backwash water tank flow in into the said inflow line before the high pressure pump of the said RO membrane unit.

  The invention which concerns on Claim 6 can connect the RO membrane unit which arrange | positioned the said backwash water tank in the upper position of the said membrane unit, and made the backwash water which flows out out of this backwash water tank flow down naturally to the said high pressure pump. It is a portable water purification system.

  The invention which concerns on Claim 7 is portable water purification which can connect the RO membrane unit which provided the holding member which can be combined with the elongate intake pump connected to the said intake line in the vertical installation state or a horizontal installation state It is a processing device.

  In the invention according to claim 8, when the RO membrane unit is detachably provided on the membrane unit via the line connection portion and the water supply connection portion, the RO membrane unit is connected to the RO membrane unit when the RO membrane unit is connected. It is a portable water purification apparatus to which an RO membrane unit used as a unit pretreatment apparatus can be connected.

  The invention according to claim 9 is capable of connecting the RO membrane unit that is injected through the pipe that protrudes into the pipe provided in the hypo-injection section and the hypo-alkaline supplied from the hypo-injection facility. It is a portable water purification system.

  The invention which concerns on Claim 10 is a portable water-purifying apparatus which can connect the RO membrane unit which provided the suction part structure for air suction prevention to the outflow part of the said backwash water tank.

  The invention which concerns on Claim 11 is a portable water-purifying apparatus which can connect the RO membrane unit which enabled voltage supply by AC100V, even when the said membrane unit and the said RO membrane unit operate simultaneously.

  The invention according to claim 12 is a portable water purification apparatus capable of connecting an RO membrane unit housed in a small frame that can be carried into and out of an entrance of a building or the like.

  According to the first aspect of the present invention, even when the membrane unit is used alone, or when the RO membrane unit is connected to the membrane unit, the safe drinking water injected into the sub-water is supplied. In addition, the membrane module filtration module can be backwashed with backwashed water that has been sub-injected, and can be used as a water purification treatment device that can effectively restore filtration performance. For this reason, according to the quality of raw | natural water, use of only a membrane unit and use in the state which connected the RO membrane unit to the membrane unit can be selected.

  According to the invention according to claim 2, when the filtration treatment by the membrane module is sufficient, the filtration treatment is performed only by the membrane unit and water is supplied, and when the reverse osmosis membrane treatment is necessary after the filtration treatment by the membrane unit. Since the RO membrane unit is connected to the membrane unit and the filtered water filtered by the membrane unit is treated with a reverse osmosis membrane, the water is supplied, so safe drinking water that has been appropriately purified according to the quality of the raw water Can be watered.

  According to the invention described in claim 3, when the RO membrane unit is connected to the membrane unit, when the power supply circuit and the signal circuit of the membrane unit and the RO membrane unit are connected, the control unit of the membrane unit includes the membrane unit and the RO unit. The power supply circuit and the signal circuit are electrically connected and the membrane unit control unit and the RO membrane unit control unit of the RO membrane unit cooperate to operate the membrane unit and the RO membrane unit simultaneously. Since it is possible to control, when connecting the RO membrane unit to the membrane unit, the setting work of the control unit and the connection work of the power supply circuit and the signal circuit between the membrane unit and the RO membrane unit are easy. Yes, a water purification apparatus excellent in operability can be obtained.

  According to the invention described in claim 4, in order to backwash the membrane module of the membrane unit using the backwash water that has been sub-injected and stored in the backwash water tank in the backwash water tank storage step, In addition to peeling off and removing the substances attached to the membrane surface due to the water pressure of the water, filtered water can be used as backwash water because it easily oxidizes and decomposes organic substances firmly attached to the membrane by its oxidizing power. A greater membrane module cleaning recovery effect can be obtained than in the case of the above. In addition, by storing the water into which the sub-water has been injected into the backwash water tank (buffer tank), it is possible to suppress the growth of mold, algae and the like in the backwash water tank.

  In addition, since hypo-subjection is performed in the water supply process of the treatment line that returns to the membrane unit after the reverse osmosis membrane treatment with the RO membrane unit, it is possible to supply safe drinking water that retains the prescribed free residual chlorine concentration. .

  According to the fifth aspect of the present invention, since the backwash water tank is also used as the buffer tank, there is no need to provide a buffer tank, so that the number of tanks can be reduced and the membrane unit can be downsized. be able to.

  According to the invention of claim 6, by arranging the backwash water tank at the upper position of the membrane unit, the backwash water can be supplied to the high pressure pump of the RO membrane unit by natural flow from the backwash water tank. The backwash water tank can also be used as a buffer tank, and there is no need to provide a buffer tank. Therefore, the number of tanks can be reduced, and the membrane unit can be downsized.

  According to the invention described in claim 7, by using the holding member, the water intake pump can be prevented from toppling over and can be stably placed in the water intake source, and the water depth of the water intake source is deeper than the length of the water intake pump. If the water source is deeper than the intake pump, the water can be taken sideways and the water can be taken and purified without selecting the water source. .

  According to the invention described in claim 8, since the RO membrane unit is detachably provided on the membrane unit via the line connection portion and the water supply connection portion, it is not sufficient to perform only the filtration treatment in the membrane unit due to the quality of raw water. If reverse osmosis membrane treatment is required, simply connect the RO membrane unit to the membrane unit via the line connection and water supply connection, and immediately use the membrane unit as a pretreatment device for the RO membrane unit. Since the RO membrane unit can perform reverse osmosis membrane treatment, the raw water can be treated by a purification method corresponding to the quality of the raw water, and unnecessary costs caused by always operating the RO membrane unit can be prevented. be able to.

  According to the ninth aspect of the present invention, since hypochlorous injection is performed through the pipe protruding into the pipe, the hypochlorous acid can be directly and uniformly mixed with the purified water flowing in the pipe. Safe drinking water having a free residual chlorine concentration can be supplied.

  According to the invention of claim 10, the suction part structure of the outflow part of the backwash water tank suppresses the rotational flow of the backwash water generated in the outflow part when the backwash water from the backwash water tank flows out. , Because it is possible to prevent the suction of air into the backwash pump that occurs with the rotating flow of backwash water, it is possible to use the backwash water stored up to the bottom of the backwash water tank. The capacity of the backwash water tank required to secure the backwash water amount can be reduced, and the membrane unit can be downsized.

  According to the eleventh aspect of the present invention, since a household AC 100V outlet can be used as a power source, it is not necessary to newly perform wiring work with the installation of the apparatus. Further, by using a commercially available small generator, it can be used even in a place where there is no power source.

  According to the invention according to claim 12, since it is possible to carry in the membrane unit from a single door or the like that can enter and exit a general person with a width of 700 mm, it is not subject to restrictions such as a building where the membrane unit is installed, Moreover, since it can be carried in and installed by manpower or the like at installation locations where heavy machinery such as in the mountains cannot be used, a water purification apparatus with excellent practicality can be obtained.

It is a schematic diagram of one Example of the membrane unit in the portable water purification apparatus of this invention. It is a schematic diagram of the state which connected the RO membrane unit to the membrane unit of FIG. (A) is a left side view of the appearance of the membrane unit 2. FIG. 2B is a front view of the appearance of the membrane unit 2. (C) is a right surface view of the appearance of the membrane unit 2. It is a perspective view which shows the external appearance of the RO membrane unit connected to the back surface of the membrane unit. (A) is a schematic diagram explaining the outflow situation of backwashing water when a suction part structure is not provided in the outflow part of the backwashing water tank. (B) is a schematic diagram explaining the suction part structure provided in the outflow part of the backwash water tank. It is drawing which expanded the A section of FIG.5 (b). It is a top view explaining the detailed structure of a hypo-subsequent injection part. It is a longitudinal cross-sectional view of a water intake pump. (A) It is drawing explaining the case where a water intake pump is used in a vertical installation state. (B) It is drawing explaining the case where a water intake pump is used in a horizontal position. It is drawing explaining the water supply process in the case of using a membrane unit independently. It is drawing explaining the backwash water storage process in the case of using a membrane unit independently. It is drawing explaining the backwashing process in the case of using a membrane unit independently. It is drawing explaining the water supply preparation process in the case of connecting and using a membrane unit and RO membrane unit. It is drawing explaining the water supply process in the case of connecting and using a membrane unit and RO membrane unit. It is drawing explaining the backwash water storage process (there is sub-injection) in the case of connecting and using a membrane unit and an RO membrane unit. It is drawing explaining the backwashing process (with sub-injection) in the case of connecting and using a membrane unit and an RO membrane unit. It is drawing explaining the backwash water storage process (without sub-injection) when the membrane unit and the RO membrane unit are connected and used.

  An example of an embodiment of a portable water purification apparatus to which an RO membrane unit in the present invention can be connected will be described in detail based on the drawings. FIG. 1 is a schematic diagram of a membrane unit 2 of a portable water purification apparatus 1 to which an RO membrane unit can be connected in the present embodiment, and FIG. 2 is a portable water purification apparatus to which an RO membrane unit can be connected in the present embodiment. 1 is a schematic view of a state where an RO membrane unit 3 is connected to a membrane unit 2 in FIG.

First, the membrane unit 2 will be described with reference to FIG. In FIG. 1, the membrane unit 2 is
A membrane module 13 having a MF (microfiltration membrane) or UF (ultrafiltration membrane) filter having a water intake line 11 on the primary side and a filtrate water line 12 on the secondary side, and the membrane module 13 filtered. A backwash water tank 15 for storing filtrated water by flowing it through a backwash water line 14 connected to the filtrate water line 12, and a membrane module 13 for passing filtered water stored in the backwash water tank 15 through a backwash pump 16. An outflow line 17 that flows out as backwash water for backwashing, and a supply water line 18 for the membrane unit provided in the filtrate water line 12 for directly supplying filtered water filtered by the membrane module 13; A hypo-injection facility for injecting back-washing sub-aqueous into the filtered water stored in the washing tank 15 and injecting disinfecting sub-aqueous into the filtered water when the membrane unit 2 is operated alone to supply the filtered water. 19 and backwash water 15, a filtered water supply line 20 for supplying filtered water stored in the RO membrane unit to the RO membrane unit, an RO membrane unit water supply line 21 for supplying RO membrane treated water returned from the RO membrane unit 3, the membrane unit 2, and the RO. A control unit 22 for controlling the operation of the unit 3 and a water intake pump 23 are provided. Further, as shown in FIG. 1, each part except for the water intake pump 23 is housed in a frame 24.

  The intake line 11 is a conduit that connects the intake pump connection port 26 and the primary side of the membrane module 13, and supplies raw water taken by the intake pump 23 to the primary side of the membrane module 13. A prefilter device 27 is provided in front of the membrane module 13 in the intake line 11. This pre-filter device 27 is a strainer that removes dust (soil, sand, and other contaminants) contained in the raw water before the raw water flows into the membrane module 13. In this example, the prefilter device 27 is a disk having an opening size of 200 μm. A mold strainer is used. The pre-filter device 27 is equipped with a differential pressure measuring device (not shown), and can detect clogging abnormality.

  The filtrate water line 12 is a pipe line that is attached to the secondary side of the membrane module 13 and allows the filtrate water filtered by the membrane module 13 to flow out of the membrane module 13.

The membrane module 13 contains an MF or UF filter (filtration membrane), and filters out general bacteria, pathogens, suspended substances (SS), etc. contained in the raw water. In this example, an MF membrane filter having a nominal pore size of 0.1 μm and a membrane area of 23 m ² is used. The membrane module 13 is provided with a backwash water drain line 28 for draining backwash water to the outside of the membrane module 13 when the MF or UF filter housed in the membrane module is backwashed. The backwash water drained from the module 13 can be drained outside the membrane unit 2 through the backwash water drain line 28.
In this example, the long membrane module 13 is housed in the frame 24 in the vertical direction, so that air is sent from the lower part of the membrane module 13 as a membrane cleaning method, and the suspended matter on the membrane surface in the membrane module 13 is sent. Although not shown in FIG. 2, a compressor and an air supply pipe that supply air to the membrane module 13 during backwashing and perform air scrubbing cleaning are provided. Provided. In order to backwash the MF or UF filter housed in the membrane module 13 more effectively, it is preferable to install these devices for air scrubbing. The membrane module 13 is also equipped with a differential pressure measuring device (not shown) and can detect clogging abnormality.

  The backwash water line 14 is a conduit for acquiring filtered water filtered by the membrane module 13 from the filtered water line 12 and supplying the filtered water to the backwash water tank 15.

  The backwash water tank 15 is a container for storing filtered water supplied via the backwash water line 14, and is disposed at an upper position of the membrane unit 2. The backwash water tank stores filtered water therein and supplies the stored filtered water as backwash water when backwashing the MF or UF filter housed in the membrane module 13, and the membrane unit 2. When the RO membrane unit 3 is connected to the RO membrane unit 3, the RO membrane unit 3 also has a role as a buffer tank that supplies filtered water to a high-pressure pump 54, which will be described later, under natural flow. In this example, the backwash water tank 15 is made of polyethylene resin, and is formed into a square shape with a capacity of 60 L.

  A water level meter (not shown) is provided inside the backwash water tank 15, and this water level gauge indicates whether the backwash water tank 15 is filled with backwash water or whether the backwash water tank is empty. Detected. In addition, the suction part structure for air suction prevention provided in the outflow part of the backwash water tank 15 is mentioned later.

  The backwash pump 16 pumps backwash water stored in the backwash water tank 15 to the secondary side of the membrane module 13 through the outflow line 17 and the filtrate water line 12, and is stored in the membrane module 13 and stored in the MF or UF. This is a pump for backwashing the filter, and is provided in the middle of the outflow line 17 connecting the backwash water tank 15 and the filtrate water line 12. In this example, as the backwash pump 16, a stainless steel horizontal axis centrifugal pump (0.4 kW, 32 A) is used.

  When the membrane unit 2 is operated alone, the supply water line 18 directly feeds the filtered water filtered by the membrane module 13 to the outside. Therefore, the water supply pipe for the membrane unit 2 provided after the filtered water line 12 is used. It is.

  The hypochlorous injection equipment 19 is a device for injecting backwashing hypochlorous acid into the filtrate water line 12 and injecting sterilizing hypochlorous acid into the RO membrane unit water supply line 21. It comprises a pump and a sub-injection line 30 for backwashing and a sub-injection line 31 for disinfection. The chlorine agent stored in the sub-tank tank is injected into the filtrate flowing through the filtrate water line 12 from the sub-injection portion 32 provided in the filtrate water line 12 through the backwash sub-injection line 30, and Then, the water is injected into the treated water flowing in the RO membrane unit water supply line 21 from the sub-substance injection portion 33 provided in the RO membrane unit water supply line 21 through the disinfection sub-injection line 31. Details of the sub-injection parts 32 and 33 will be described later.

  In this example, sodium hypochlorite is injected by the hypochlorous acid injection equipment 19, and the hypochlorous tank is made of polyethylene resin and formed into a square shape with a capacity of 25L. In addition, the sub-injection pump can be injected into the backwashing sub-injection line 30 and the disinfection sub-injection line 31 using a diaphragm metering pump (φ4 × 20 W). The disinfectant to be injected from the hypochlorous injection facility 19 is not limited to the sodium hypochlorite of this example, but, like sodium hypochlorite, calcium hypochlorite or chlorine hypochlorite for water disinfection or Liquefied chlorine can also be used.

  The filtrate water supply line 20 is a conduit for supplying filtrate water filtered by the membrane unit 2 to the RO membrane unit 3 when the RO membrane unit 3 is connected to the membrane unit 2 and backwashed. It branches off from the outflow line 17 at the top of the pump 16. A tip end portion of the filtrate water supply line 20 is provided with a line connection portion 35a for connecting to an inflow line 51 described later of the RO membrane unit 3.

  The RO membrane unit water supply line 21 feeds the treated water returned to the membrane unit 2 after being subjected to the reverse osmosis membrane treatment by the RO membrane unit 3 and then supplied to the outside of the membrane unit 2 after being sub-injected from the hypo-injection equipment 19. It is a pipeline for doing. By providing the RO membrane unit water supply line 21 in the membrane unit 2, the sub-injection is also performed for the treated water subjected to the reverse osmosis membrane treatment by the RO membrane unit 3 using the hypo-injection equipment 19 of the membrane unit 2. be able to. At the tip of the RO membrane unit water supply line 21, a water supply connection portion 36 a for connecting to a later-described treated water line of the RO membrane unit 3 is provided.

  The control unit 22 is a device that automatically operates the portable water purification apparatus 1 by controlling the operation of the membrane unit 2 and the RO membrane unit 3 in cooperation with the RO membrane unit control unit 22a described later. The control unit 22 and the RO membrane unit control unit 22a perform sequence control using a PLC (Programmable Logic Controller), perform back-washing of the membrane module 13 at preset time intervals, and perform filtration processing capability. Is recovering.

  In addition to this, the control unit 22 operates the intake pump 23 based on a signal from a water level meter installed in the backwash water tank 15, stores filtered water (backwash water) in the backwash water tank 15, and the backwash pump 16. And the operation of the hypo-injection pump of the hypo-injection facility 19 are controlled, and the open / close operation of the electric valve installed in the line in the membrane unit 2 is performed in accordance with these controls.

  Moreover, as shown in FIG. 3, the control part 22 is arrange | positioned in the upper part position of the membrane unit 2 at the front side of the backwash water tank 15, and provides the operation and the display part 22b of the portable water purification apparatus 1 in the front. Therefore, the operation of the apparatus and the confirmation of the display unit can be easily performed together with the vertical configuration of the membrane unit 2.

  The intake pump 23 is a long pump that takes the raw water 37a from the intake source 37 and supplies the raw water 37a to the membrane unit 2, and is completely submerged in the raw water of the intake source 37 as shown in FIG. use. The intake pump 23 and the intake pump connection port 26 of the membrane unit 2 are connected by an intake hose 23a. The details of the intake pump 23 will be described later.

  In this example, the frame 24 is manufactured by combining stainless steel (SUS) profiles, and the appearance of each part incorporated in the frame is as shown in FIG. A caster 44 is provided.

  The membrane unit 2 configured as described above is configured to be small in a state of being housed in a vertical frame 24 having a width of about 650 mm, a depth of about 800 mm, and a height of about 1750 mm, and a mass during transportation is about 185 kg. Because it is light and lightweight, it is not only possible to carry in manually by a single door with a width of 700 mm, which is generally used in buildings, but it is also easy to move and store even in a small space, and even in limited spaces, multiple A stand can be installed.

  Next, the RO membrane unit 3 will be described with reference to FIG. In FIG. 2, the RO membrane unit 3 includes an RO membrane module 53 having a RO membrane (reverse osmosis membrane) filter having an inflow line 51 on the primary side and a treated water line 52 on the secondary side, and the membrane unit 2. A high pressure pump 54 that pressurizes the filtered water supplied from the inflow line 51 and supplies the filtered water to the RO membrane module 53, and a conductivity meter 55 that measures the conductivity of the permeated water subjected to reverse osmosis treatment by the RO membrane module 53. And an RO membrane unit controller 22 a that controls the operation of the RO membrane unit 3 in cooperation with the controller 22 of the membrane unit 2, and is housed in the frame 56.

  The inflow line 51 is a conduit for supplying the filtrate supplied from the membrane unit 2 to the primary side of the RO membrane module 53, and has a line connection part 35 b at the tip thereof to supply the filtrate water of the membrane unit 2. It can be connected to a line connecting portion 35 a provided at the tip of the line 20.

  The treated water line 52 is a pipe line that is attached to the secondary side of the RO membrane module 53 and returns the permeated water (treated water) that has been subjected to the reverse osmosis membrane treatment by the RO membrane module 53 to the membrane unit 2. This part is provided with a water supply connection part 36b and can be connected to a water supply connection part 36a provided at the tip of the RO membrane unit water supply line 21 of the membrane unit 2.

  The RO membrane module 53 incorporates a reverse osmosis membrane (RO membrane) filter, and removes bacteria, viruses, harmful organic substances, and the like that cannot be removed by the MF or UF filter of the membrane unit 2. In this example, the RO membrane module 53 uses an aromatic polyamide composite reverse osmosis membrane.

  Further, the RO membrane module 53 includes concentrated water for draining the concentrated water generated when the filtered water supplied from the membrane unit 2 is subjected to the reverse osmosis membrane treatment to the outside of the RO membrane module 53. A drainage line 57 is provided, and the concentrated water generated by the reverse osmosis membrane treatment in the RO membrane module 53 can be drained to the outside of the RO membrane unit 3 through the concentrated water drainage line 57. The RO membrane module 53 is also equipped with a differential pressure measuring device (not shown) and can detect clogging abnormality.

  The high-pressure pump 54 is provided in the middle of the inflow line 51, and is a pump that pressurizes the filtered water supplied from the membrane unit 2 and supplies it to the RO membrane module 53. In this example, a vane pump is used as the high-pressure pump 54 and the filtered water is pressurized to 1.0 MPa and supplied to the RO membrane module 53.

  The conductivity meter 55 is provided in the treated water line 53 immediately after the RO membrane module 53, and measures the conductivity of the permeated water (treated water) subjected to the reverse osmosis membrane treatment by the RO membrane module 53. Immediately after the reverse osmosis membrane treatment is started by the RO membrane module 53, the water remaining in the RO membrane module 53 flows out, and the conductivity meter 55 measures the conductivity of the permeated water. Thus, it is possible to confirm that the outflow of the water remaining in the RO membrane module 53 has ended, and the permeation of the filtered water newly reverse osmosis treated by the RO membrane module 53 has started.

  In order to drain the water flowing out immediately after the RO membrane module 53 starts operating to the outside of the RO membrane unit 3, the treated water line 52 and the concentrated water drain line 57 are connected by a drain line 58, An electric valve 59 is provided in the drainage line 58, and the electric valve 59 is opened until the measured value of the conductivity meter 55 falls below a specified value. Is drained to the concentrated water drainage line 57.

  The RO membrane unit control unit 22 a controls the operation of the high-pressure pump 54 in cooperation with the control unit 22 of the membrane unit 2. In controlling the high-pressure pump 54, the RO membrane unit controller 22 a opens and closes the electric valves 59 and 60 based on the signal from the controller 22 of the membrane unit 2 and the measured value of the conductivity meter 55. Yes.

  In this example, the frame 56 is manufactured by combining SUS shape members in the same manner as the frame 24 of the membrane unit 2, and an external perspective view in which each part is incorporated in the frame 56 is as shown in FIG. 4. Become.

  As described above, the membrane unit 2 and the RO membrane unit 3 are provided at the distal end portion of the inflow line 51 of the RO membrane unit 3 and the line connection portion 35a provided at the distal end portion of the filtrate water supply line 20 of the membrane unit 2. The line connection part 35 composed of the line connection part 35 b and the water supply connection part 36 a provided at the distal end part of the RO membrane unit water supply pipe 21 of the membrane unit 2 and the distal end part of the treated water line 52 of the RO membrane unit 3 It is detachably connected through a water supply connection portion 36 constituted by the provided water supply connection portion 36b.

  The line connection part 35 and the water supply connection part 36 are parts for connecting / separating the line system and the electrical system between the membrane unit 2 and the RO membrane unit 3, and connecting the hose system connection part and the electrical system connection part (not shown). I have. By the hose system connection portion, the filtrate water supply line 20 of the membrane unit 2 and the inflow water line 51 of the RO membrane unit 3, and the RO membrane unit water supply line 21 of the membrane unit 2 and the treated water line 52 of the RO membrane unit 3 are watertight. Can be connected and disconnected in a state. When the power supply circuit and the signal circuit between the membrane unit 2 and the RO membrane unit 3 are connected by the electrical system connection unit, the control unit 22 of the membrane unit 2 is connected to the RO membrane unit control unit 22a of the RO membrane unit 3 And the membrane unit 2 and the RO membrane unit 3 can be operated in cooperation.

  In addition, in this example, the intake line 11 of the membrane unit 2, the filtrate water line 12, the backwash water line 14, the outflow line 17, the supply water line 18, the filtrate water supply line 20, the RO membrane unit water supply line 21, the backwash The water drainage line 28, the inflow line 51 of the RO membrane unit 3, the treated water line 52, the concentrated water drainage line 57, and the drainage line 58 are formed using an HIV pipe (impact-resistant rigid polyvinyl chloride pipe) having an inner diameter of 25A. It is composed.

  Next, the suction part structure for preventing air suction provided in the outflow part of the backwash water tank 15, the detailed structure of the sub-injection parts 32 and 33 of the sub-injection equipment 19, and the details of the intake pump 23 will be described.

  First, the suction part structure for preventing air suction provided in the outflow part 61 of the backwash water tank 15 will be described. FIG. 5A schematically shows a situation in which the backwash water 62 flows out from the backwash water tank 15 when the suction part structure for preventing air suction is not provided in the outflow part 61 of the backwash water tank 15. FIG. The state in which the backwash water 62 flows out from the backwash water tank 15 occurs not only when the membrane module 13 is backwashed but also when the filtered water is supplied to the RO membrane unit 3. When the backwashing water 62 stored in the backwashing water tank 15 is taken out from the outflow part 61 for backwashing the membrane module 13 or supplying to the RO membrane unit 3, the backwashing water 62 is rotated in the outflow part 61. Stream 63 is produced. At this time, since rotation also occurs in the backwash water 62 in the backwash water tank 15, the water surface 64 is depressed in a funnel shape, and when the outflow of the backwash water 62 proceeds and the water surface 64 is lowered, finally, it is indicated by an arrow 65. As described above, air is sucked into the outflow portion 61. If air is sucked into the backwash pump 16 or the high pressure pump 54 of the RO membrane unit 3, the backwash pump 16 or the high pressure pump 54 may be damaged. Therefore, the backwash water tank 15 has a suction portion structure for preventing air suction. If not provided, it is necessary to stop taking out the backwash water at a stage where no air is sucked in. Therefore, in order to secure the required amount of backwash water, the supply amount to the RO membrane unit 3 is secured. Therefore, it is necessary to enlarge the backwash water tank 15.

  Therefore, when the backwash water stored in the backwash water tank 15 is pumped by the backwash pump 16 or supplied to the RO membrane unit 3, the rotational flow generated in the backwash water in the outflow portion 61 is suppressed, In order to allow the backwash water to be taken out to the bottom 66 of the backwash water tank 15, a suction part structure for preventing air suction is provided in the outflow part 61, and a small size of the backwash water tank 15 is ensured while ensuring a required amount of backwash water. I tried to change.

  The backwash water tank 15 is provided with water level meters (not shown) at the top and bottom, respectively, and these water level gauges detect the full water state and the empty state in the backwash water tank 15 and send a signal to the control unit 22. Yes. This water level meter is equipped with four metal electrodes for detecting water level of different lengths and one metal electrode for common, and a total of five metal electrodes for both water level detection and common. When in contact with the backwash water, the current flows between the water level detection and common electrodes. For this reason, when the water level meter arranged in the upper part of the backwash water tank 15 is conducted, it is determined that the backwash water tank 15 is full, and the supply of backwash water through the backwash water line 17 is stopped. When the water level meter arranged at the bottom 66 of the backwash water tank 15 is disconnected, it is determined that the backwash water tank 15 is empty, and the operation of the backwash pump 16 is stopped.

  In this invention, as shown in FIG.5 (b), the metal electrodes 67 and 68 of the water level meter arrange | positioned at the bottom 66 side of the backwash water tank 15 are inserted in the outflow part 61, and the suction part for air suction prevention It has a structure. By inserting the electrodes 67 and 68 into the outflow part 61 in this way, it is possible to suppress the flow down speed of the backwash water, and the electrodes 67 and 68 also have an effect as a rectifying plate. It is possible to suppress the generation of a rotating flow in 61 and prevent the suction of air into the backwash pump 16 and the high-pressure pump 54 of the RO membrane unit 3. As a result, it is possible to reduce the size of the backwash water tank 15 while securing a required amount of backwash water.

  Further, as shown in FIG. 6 in which the portion A of FIG. 5B is enlarged, a protective cover 69 made of an insulating material such as synthetic resin is attached to the tip of the shorter electrode 67 so that the electrode 67 is directly attached. In addition, a detection error that may occur when the outflow portion 61 comes into contact with the tube wall 61a is prevented. In the water level meter arranged at the bottom of the backwash water tank 15, if the shorter electrode 67 is exposed from the water surface of the backwash water 62, the electrodes 67 and 68 are not connected. It is determined that the water level of the backwash water 62 stored in the backwash water tank 15 has reached the lower limit. However, if the electrode 67 and the tube wall 61a can be in direct contact with each other, there is a possibility that the electrode 67 and the electrode 68 are made conductive by the influence of water (back washing water) that wets the surface of the tube wall 61a. In order to eliminate the possibility, a protective cover 69 is attached to the tip of the electrode 67 to prevent the electrode 67 from directly contacting the tube wall 61 a of the outflow portion 61.

  In addition, since a flat surface is formed on the upper surface portion 69a of the protective cover 69 in manufacturing, water flowing down from the upper surface portion 69a to the neck portion 69b is surely prevented in order to prevent water from collecting on this surface. By forming a vertical portion having a height that can be eliminated (in this example, 5 mm or more), and further forming the diameter of the body portion 69c following the neck portion 69b larger than the diameter of the neck portion 69, the electrode 67 is formed. It is possible to prevent erroneous detection that occurs when the outflow portion 61 directly contacts the tube wall 61a and erroneous detection that occurs when water that wets the surface of the tube wall 61a contacts with water that adheres to the electrode 67.

  As a result of the above configuration, as shown in FIG. 6, the water surface 64 of the backwash water 62 stored in the backwash water tank 15 is higher than the height of the upper surface portion 69 a of the protective cover 69 attached to the tip of the electrode 67. It is determined that the water level of the backwash water 62 reliably stored in the backwash water tank 15 has reached the lower limit at the stage where it has dropped. For this reason, the required amount of backwash water and the amount supplied to the RO membrane unit 3 can be secured, and the backwash water tank 15 can be reduced in size.

Subsequently, the detailed structure of the hypo-injection portion will be described. Since the sub-injection part 32 and the sub-injection part 33 have the same structure, only the sub-injection part 32 will be described here.
As shown in FIG. 7, the hypoinjection section 32 is provided with a T-shaped tube 71 in the middle of the filtrate water line 12, and the inner periphery of the T-shaped tube 71 in the pipe constituted by the filtrate water line 12 and the T-shaped tube 71. A hypo-injection pipe 73 is projected from the surface 72 into the pipe. The pipe 73 is attached by a chemical injection joint 74 to the distal end of the sterilizing sub-injection line 30 to which the sub-injection equipment 19 supplies hypo- The pipe 73 and the T-shaped tube 71 are detachably connected by a union joint 75.

  Since the tip 73a of the pipe 73 protrudes from the inner peripheral surface 72 of the T-tube 71 in the pipe, it is possible to directly supply hypochlorous water to the water (filtered water) flowing through the pipe from the tip 73a of the pipe 73. As a result, the supplied hypochlorous is immediately mixed with water uniformly by the flow of water in the pipe. However, it is necessary to pay attention to the protruding amount of the pipe 71 because the fluid resistance is such that the tip 73a of the pipe 73 protrudes excessively.

  Further, by loosening the threaded portion of the union joint 75, the pipe 73 can be easily detached from the T-shaped tube 71. Therefore, a visual inspection is performed to determine whether the pipe 73 is clogged with foreign matter or chlorine solidification. It can be easily performed, and when clogging occurs at the tip 73a of the pipe 73, the clogging can be eliminated immediately by cleaning, so that safe drinking water to which hypoxia is reliably supplied can be obtained. Can be supplied. In addition to this, when the portable water purification apparatus 1 is operated with the pipe 73 removed from the T-shaped tube 71, the sub-a is actually supplied when the sub-a injection facility 19 needs to supply the sub-a. In addition, it can be visually confirmed that the supply of hypochlorous is surely stopped when the hypochlorous should not be supplied.

  In this example, the pipe 73 is made of a synthetic resin pipe, and when it is difficult to remove clogged solidified chlorine, the tip can be easily cleaned or cut and reused. .

  Further, the intake pump 23 will be described. As shown in FIG. 8, the intake pump 23 has a multi-stage pump 82 that is rotated by the submersible motor unit 81 disposed above the submersible motor unit 81, and includes a suction port 83 on the upper side surface of the submersible pump unit 81. In addition, a long outer tube 84 is provided on the outer periphery of the submersible motor unit 81, the suction port 83, and the multistage pump 82, and a long cylindrical screen (for removing large foreign matters on the outer periphery of the outer tube 84). Punching metal) 85 is provided.

  By configuring the intake pump 23 as described above, the sectional area of the gap 86 formed between the outer peripheral surface of the submersible motor unit 81 and the inner periphery of the outer pipe 84 is taken from the area of the raw water inlet 87 of the water pump 23. If it is formed smaller, the flow rate of the raw water 37a that is sucked from the raw water suction port 87 and flows through the gap 86 is increased. Therefore, in the intake pump 23, the flow rate of the raw water 37a passing through the gap 86 becomes the minimum speed at which the submersible motor built in the submersible motor unit 81 can be cooled. A cross-sectional area of a gap 86 formed between the inner circumferences of the pipe 84 is formed.

  Since the outer pipe 84 is provided on the outer periphery of the submersible motor unit 81 and the like, and the cross-sectional area of the gap 86 is formed in this way, the submersible motor is always reliably cooled when the water intake pump 23 is taking water, Stable use for a long time is now possible. In addition, since the submersible pump can be stably cooled regardless of the posture of the intake pump 23, the raw water can be taken in at any depth other than the well if the intake pump 23 is submerged. It became possible to do.

In addition to this, as shown in FIGS. 9A and 9B, the water intake pump 23 includes a tripod mounting portion 88 in the middle of the outer peripheral portion and a bipod mounting portion 89 in the upper portion.
As shown in FIG. 9A, when three legs 91 are attached to the tripod attachment portion 88, the water intake pump 23 can be used stably in a vertically placed state. Therefore, even if the water intake source is a pond, a river, a lake, or the like other than a well, the water intake pump 23 can be disposed on the bottom surface of the water intake source with the three legs 91 being stabilized, and the water intake pump 23 is provided between the end portion 92 of the 23 and the bottom portion of the water intake source 37, and the suction of sludge at the bottom portion can be prevented.

  If the water intake source is shallow and the water intake pump 23 cannot be submerged in the vertical position, two legs 91 are attached to the upper biped attachment part 89, and the water intake pump 23 is placed in the horizontal state. 37 can be immersed in water. In addition, when the intake pump 23 is installed vertically, the leg 91 can be provided with a gap 93 between the end 92 of the intake pump 23 and the bottom of the intake source, and the intake pump 23 is used in a horizontally installed state. In some cases, the length is set such that the required angle can be set reliably. In addition, since the cylindrical screen (punching metal) 85 is not fixed, the cylindrical screen (punching metal) 85 can rotate and move in a lateral direction with a small amount. Thereby, it is easy to clean, and even when subjected to an impact from the outside, the cylindrical screen (punching metal) 85 is not easily deformed by rotating and moving in a lateral direction by a small amount.

  Then, an effect | action and effect of the portable water purification apparatus 1 in this invention are demonstrated. First, the operation and effect when the membrane unit 2 is operated alone will be described. In the operation of the membrane unit 2 alone, there are a water supply process, a backwash water storage process, and a backwash process. Hereinafter, each step will be described with reference to the drawings. In the drawing, a solid line indicates that water or the like is flowing, and a broken line indicates that water or the like is not flowing. In addition, the electric valve expressed in white indicates that it is in an open state, and the electric valve expressed in black indicates that it is in a closed state.

  FIG. 10 shows a water supply process when the membrane unit 2 is operated alone. This step is a step of purifying the taken raw water and supplying it as safe drinking water. The raw water taken by the water intake pump 23 from the water intake source passes through the pre-filter device 27 via the water intake line 11 and is supplied to the membrane module 13 after the dust contained in the raw water is removed.

  The filtered water that has been filtered by the membrane module 13 and from which general bacteria, pathogenic bacteria, suspended solids (SS), etc. contained in the raw water have been removed passes through the filtered water line 12 from the hypo-injection facility 19. Hypochlorous acid is injected through the injection part 32 and supplied from the supply water line 18 as safe drinking water.

  In the portable water purification apparatus 1 according to the present invention, the controller 22 controls the membrane module 13 to perform backwashing at regular time intervals. In the present embodiment, control is performed by the control unit 22 so as to perform backwashing once every 30 minutes, and automatic operation is performed. Therefore, when a predetermined time elapses, the process proceeds to a backwash water storage step in which backwash water for backwashing is stored in the backwash water tank 15. In this example, the time required to store the backwash water in the backwash water tank 15 is about 2 minutes.

  In the backwash water storage step, as shown in FIG. 11, the electric valve 40 provided in the backwash water line 14 is opened, and the electric valve 39 provided in the supply water line 18 is closed. As a result, the filtered water that has been filtered by the membrane module 13 and then injected by the hypo-injection section 32 is a check valve in which the back flow from the filtered water line 12 is provided on the outflow side of the backwash pump 16. 41 is shut off and stored in the backwash water tank 15.

  When the water level gauge provided in the upper part of the backwash water tank 15 detects that the backwash water tank 15 is full, the backwash water storage process is completed, and the MF or UF filter stored in the membrane module 13 is backwashed. Shift to backwashing process.

  In the backwashing process, the operation of the water intake pump 23 is stopped, and as shown in FIG. 12, the electric valve 38 provided in the water intake line 11 and the electric valve 40 provided in the backwash water line 14 are closed. . Further, the electric valve 39 provided in the supply water line 18 is closed, the electric valve 42 provided in the backwash water drain line 28 is opened, and the backwash pump 16 is operated.

  As a result, the backwash water containing the secondary water stored in the backwash water tank 15 is supplied from the secondary side into the membrane module 13 through the check valve 41, and the stored MF or UF filter is backwashed. After that, the water is drained outside the membrane unit 2 through the backwash water drain line 28. As described above, the backwash water at this time contains hypochlorous acid. Therefore, unlike the backwash using simply the water pressure using clean water, the backwash water uses the oxidizing power of residual chlorine contained in the backwash water. Organic substances such as humic substances and microorganism-derived proteins attached to the membrane surface and membrane pores can be decomposed and removed. Further, by storing water containing hypochlorous acid in the backwash water tank 15, generation of mold and algae in the backwash water tank 15 can be effectively suppressed.

  When the backwashing process is completed, the water supply process is resumed, and as shown in FIG. 10, the backwashing pump 16 is stopped, and then the electric valve 38 provided in the water intake line 11 and the electric valve 39 provided in the supply water line 18 are provided. In the open state, the electric valve 42 provided in the backwash water drain line 28 is closed, and the water intake pump 23 is operated to start water supply.

  As described above, the membrane unit 2 can be operated alone to supply a safe beverage when only the filtration treatment of the membrane module 13 is sufficient due to the quality of the raw water.

  Next, operations and effects when the RO membrane unit 3 is connected to the membrane unit 2 will be described. In the operation when the RO membrane unit 3 is connected to the membrane unit 2 for use, a water supply preparation step, a water supply step, a backwash water storage step (with sub-injection), a backwash step (with sub-injection), and reverse There are each of a washing water storage process (without sub-injection) and a backwash process (without sub-injection). Hereinafter, although each process is demonstrated with drawing, description is abbreviate | omitted about the part which is common in the case where the membrane unit 2 is drive | operated independently.

  The water supply preparation step is a step of stopping water supply to the outside of the permeated water processed by the RO membrane module 53 until the reverse osmosis membrane treatment of the RO membrane module 53 is stabilized. As shown in FIG. 13, in the membrane unit 2, after the filtration process by the membrane module 13, filtered water that does not inject hypoxia is stored in the backwash water tank 15. When the backwash water tank 15 is full, the electric valve 43 is opened, and the backwash water stored in the backwash water tank 15 is supplied to the high-pressure pump 54 by natural flow.

  When storing filtered water in the backwash water tank 15, the reverse osmosis membrane accommodated in the RO membrane module 53 in the RO membrane unit 3 is an aromatic polyamide composite reverse osmosis membrane, This is because when the water containing chlorine is back-washed, the separation functional layer is deteriorated. Further, since the backwash water tank 15 is arranged at the upper position of the membrane unit 2, the stored backwash water can be supplied to the high pressure pump 54 by natural flow, so that the backwash water tank 15 is used for the high pressure pump 54. It can also be used as a buffer tank.

  Thereafter, when the high-pressure pump 54 is operated and the filtered water supplied from the membrane unit 2 is pumped to the RO membrane module 53, the RO membrane module 53 separates the permeated water and the concentrated water, and the MF or UF of the membrane unit 2 is separated. The permeated water from which bacteria, viruses, harmful organic substances and the like that cannot be removed by the filter are removed flows to the treated water line 52 and the concentrated water flows to the concentrated water drain line 57.

  Immediately after the reverse osmosis membrane treatment is started by the RO membrane module 53, the treatment is not stable, so the electric valve 59 is opened and the electric valve 60 is closed to drain the permeate to the concentrated water drain line 57. And do not supply water. When the measured value of the conductivity meter 55 provided in the treated water line 52 becomes equal to or lower than the set value, it is determined that the reverse osmosis membrane treatment is stable, and the water supply preparation process is terminated and the process proceeds to the water supply process.

  In the water supply process, as shown in FIG. 14, the electric valve 59 is closed and the electric valve 60 is opened, and the return of permeated water to the membrane unit 2 is started via the water supply connection part 36. When the return of the permeated water to the membrane unit 2 is started, hypochlorous acid is injected from the hypochlorous injection facility 19 through the hyponitrous injection unit 33 and supplied from the RO membrane unit water supply line 21 as safe drinking water. The

  When the portable water treatment apparatus 1 is operated for a predetermined time, the process proceeds from the water supply process to the backwash water storage process (with sub-injection). In the backwash water storage step (with sub-injection), as shown in FIG. The check valve 41 provided on the outflow side of the backwash pump 16 is shut off, and the backwash water into which the sub-water has been injected is stored in the backwash water tank 15. Further, the flow path may be operated by an electric valve instead of the check valve.

  Further, in the backwash water storage process, filtered water cannot be supplied to the RO membrane unit 3, so that the electric valve 43 is closed and the high pressure pump 54 is operated until the water supply preparation process is resumed. Stop.

  When the water level meter provided in the upper part of the backwash water tank 15 detects that the backwash water tank 15 is full, the backwash water storage process is completed, and the MF or UF filter (filtration membrane) stored in the membrane module 13 is completed. The process moves to the backwashing process (with sub-injection).

  In the backwashing process (with sub-injection), the operation of the water intake pump 23 is stopped, and as shown in FIG. 16, the electric valve 38 provided in the water intake line 11 and the electric valve provided in the backwash water line 14 40 is closed. In addition, the electric valve 39 provided in the supply water line 18 is closed, the electric valve 42 provided in the backwash water drain line 28 is opened, and the backwash pump 16 is operated so that Is supplied into the membrane module 13 through the check valve 41. By using backwashing water into which hypochlorous acid has been injected in this backwashing step, humic substances adhering to the membrane surface and membrane pores of the MF or UF filter (filtration membrane) housed in the membrane module 13 Organic substances such as proteins derived from microorganisms can be decomposed and removed.

  Since the backwash pump 16 consumes most power in the membrane unit 2, the peak current during operation of the membrane unit 2 is the backwash process, but as described above, the backwash storage process (next Since the operation of the high-pressure pump 54 of the RO membrane unit 3 is stopped and the power consumption of the RO membrane unit 3 is reduced until the water supply preparation process is restarted. The total consumption current of the unit 2 and the RO membrane unit 3 can be set to AC 100 V, 15 A or less. As a result, since a household AC100V outlet can be used as a power source, it is possible to newly minimize wiring work as the apparatus is installed. Further, by using a commercially available small power generator, it can be used even in a place where there is no power source.

  As described above, water containing residual chlorine cannot be supplied to the RO membrane module 53. However, in the backwashing process (with sub-injection), backwashing with backwashing water containing hypochlorous acid was performed, so the membrane module 13 There is backwash water containing hypochlorous acid inside. For this reason, it is necessary to backwash with clean water not containing hypochlorous acid and rinse the inside of the membrane module 13 to remove residual chlorine. Therefore, after performing the backwash process (with sub-injection), the process proceeds to the backwash water storage process (without sub-injection).

  As shown in FIG. 17, the backwash water storage process (without sub-injection) does not inject sub-a from the sub-injection equipment 19 into the filtered water, and does not contain sub-aqueous in the back-wash water tank 15. To store. After the backwash water that does not contain sublimation in the backwash water tank 15 becomes full, the backwash process (without sub-injection) similar to the backwash process (with sub-subject injection) shown in FIG. The membrane module 13 is rinsed to remove residual chlorine.

  After the backwashing process (without sub-injection) is completed, the process returns to the water supply preparation process described above, so that filtered water containing residual chlorine is not supplied to the RO membrane module 53 and is stored in the RO membrane module 53. There is no risk of degrading the reverse osmosis membrane.

  As described above, the portable water purification apparatus according to the present invention is configured to be able to select an operation using only the membrane unit and an operation connecting the membrane unit and the RO membrane unit depending on the quality of the raw water. As a result, unnecessary operating costs can be prevented.

  In addition, the RO membrane unit can be reduced in size by returning permeate from the RO membrane unit to the membrane unit and supplying the secondary water from the membrane unit's secondary supply facility. The membrane unit is reduced in size and weight by reducing the size of the backwash water tank by the suction part structure for preventing air suction provided at the outflow part of the water washing tank. In addition, it is possible to use a household AC 100V outlet as a power source.

  In addition, since the intake pump that can take water from the intake source shallower than the full length of the intake pump is provided, the intake source is not restricted in an emergency such as a disaster.

  Therefore, the portable water treatment apparatus according to the present invention can be used not only as an emergency water purification base in the event of a disaster, but also installed in an existing building as an alternative when the so-called marginal village water supply facilities have deteriorated. And, it is possible to supply water stably in the medium to long term without any special additional work.

DESCRIPTION OF SYMBOLS 1 Portable water purification apparatus 2 Membrane unit 3 RO membrane unit 11 Intake line 12 Filtration water line 13 Membrane module 14 Backwash water line 15 Backwash water tank 16 Backwash pump 17 Outflow line 18 Supply water line 19 Sub-injection equipment
21 RO membrane unit water supply line 22 Control unit 22a RO membrane unit control unit 23 Intake pump 51 Inflow line 52 Treated water line 53 RO membrane module

Claims (12)

  In the portable membrane unit, an MF or UF membrane module having a water intake line on the primary side and a filtrate water line on the secondary side, and a backwash water tank that flows in from the backwash water line connected to the filtrate water line And an outflow line that flows out from the backwash water tank through the backwash pump to the membrane module, and backwash sublimation is injected into the backwash water tank, and when only the membrane unit is supplied with water, A sub-injection facility for injecting sub-water, and when connecting the RO membrane unit to the membrane unit, the back-flush water tank and the inflow line of the RO membrane unit have a line connection portion that can be connected The RO membrane unit water supply line of the membrane unit is configured to supply water from the treated water line of the RO membrane unit in a state of being connected so as to be injected with the sterilization sub-amount from the hypo-injection facility. DOO connectable portable water purification device RO membrane unit according to claim.   When the membrane unit is used only, a supply water line for the membrane unit is provided in the filtrate water line, and when the RO membrane unit can be connected to the membrane unit, the treated water line and the RO membrane are provided. The portable water purification apparatus which can connect the RO membrane unit of Claim 1 provided with the water supply connection part which connects the water supply line for units.   The RO membrane unit includes an RO membrane unit controller, and when the membrane unit and the RO membrane unit are connected, the RO membrane unit controller and the controller of the membrane unit are electrically connected. The portable water-purifying apparatus which can connect the RO membrane unit of Claim 1 or 2 recognized by a state.   4. The apparatus according to claim 1, wherein, when the RO membrane unit is connected, the hypo-injection equipment operates only in a water supply step of the treated water line of the RO membrane unit or a storage step of the backwash water tank. A portable water treatment apparatus capable of connecting the RO membrane unit according to any one of the preceding claims.   The portable water purification apparatus which can connect the RO membrane unit of any one of Claims 1 thru | or 4 which used also as the buffer tank which makes the said backwash water tank flow in into the said inflow line before the high pressure pump of the said RO membrane unit .   The RO membrane according to any one of claims 1 to 5, wherein the backwash water tank is disposed at an upper position of the membrane unit, and the backwash water flowing out of the backwash water tank is allowed to flow down naturally to the high-pressure pump. Portable water treatment system that can connect units.   The RO membrane unit according to any one of claims 1 to 6, wherein a holding member that can be used in a vertically placed state or a horizontally placed state is provided to a long-sized intake pump connected to the intake line. Possible portable water treatment system.   The RO membrane unit is detachably provided on the membrane unit via the line connection portion and the water supply connection portion, and when the RO membrane unit is connected, the membrane unit is used as a pretreatment device for the RO membrane unit. The portable water purification apparatus which can connect RO membrane unit of claim | item 1.   The RO membrane according to any one of claims 1 to 8, wherein hypoxia supplied from the hypo-injection facility is injected through a pipe protruding into a pipe provided in the hypo-injection unit. Portable water treatment system that can connect units.   The portable water treatment apparatus which can connect the RO membrane unit of any one of Claim 1 thru | or 9 which provided the suction part structure for air suction prevention in the outflow part of the said backwash water tank.   The portable water treatment apparatus to which the RO membrane unit according to any one of claims 1 to 10 can be connected even when the membrane unit and the RO membrane unit are operated simultaneously.   The portable clean water capable of connecting the RO membrane unit according to any one of claims 1 to 11, wherein at least the transport type membrane unit is housed in a small frame that can be carried into and out of an entrance of a building or the like. Processing equipment.

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