JP3890533B2 - Emergency water purifier - Google Patents

Description

  The present invention relates to a reverse osmosis membrane type water purification apparatus suitable for emergencies, and in particular, by using a portable pump for fire fighting possessed by a voluntary disaster prevention team in each region, Is a new emergency water purifier that can secure a stable amount of water.

In the event of a disaster such as an earthquake, so-called lifelines such as electricity, gas, and water supply will inevitably stop, and it may take a considerable amount of time to recover. For example, in the 1995 Great Hanshin-Awaji Earthquake, it took a relatively short period of about one week to restore electricity, but it took a long period of about three months to restore water and gas. This is thought to be due to the fact that it took a lot of time to repair not only the mains but also the pipes that were drawn into each household.
For this reason, securing drinking water and cooking water in the event of a disaster, etc., is not necessarily dependent on stockpiling and water trucks, but can also be obtained independently from rivers and other water sources at each district or individual level. A method is needed. Of course, preparing for each region to proactively secure drinking water in the event of a disaster has increased social interest in terms of improving or strengthening regional disaster prevention capabilities. In recent years, it has been attracting particular attention as a desirable form from the viewpoint of countermeasures.

Of course, such emergency water purifiers mainly for disasters have been developed and some of them have been put into practical use. However, the conventional emergency water purifier has the following problems. In other words, in many cases, conventional emergency water purifiers have a multi-stage (complex) filtration mechanism, and a disinfectant solution is also required to maintain and manage them. It was not easy. For this reason, the entire device including a pump (mainly a manual pump) is extremely expensive, and cannot be easily purchased at the local disaster prevention team or neighborhood association level, for example.
Moreover, since there are many components, the weight of the whole apparatus also became heavy and the form conveyed by several persons was common. Of course, some of the above-mentioned components are mounted on carts or carts with wheels so that they can be transported by one person. However, it is not always known whether the ground (conveying surface) is flat during a disaster. It was also considered that the form of mounting on carts and carts hindered transportability.
In addition, it is preferable to use a cart or the like on a horizontal mounting surface in a form in which components, particularly treated water outlets (faucets) and the like are attached to an appropriate height position of the cart or carriage, It is not clear whether such a place can be secured at the time of a disaster.

  The present invention has been made in view of such a background, and a portable fire pump owned by the voluntary disaster prevention team, which is often formed mainly in each region, is converted into a filtration system using a reverse osmosis membrane (so-called RO system, RO is an abbreviation of [Reverse Osmosis]) and is used as an emergency water purifier, so that the cost of the emergency water purifier can be kept extremely low. At the same time, it is an attempt to develop a new and practical emergency water purifier that can be transported by a very small number of people during use.

That is, the emergency water purifier according to claim 1 connects a filtration mechanism including a reverse osmosis membrane filter to a portable pump, and pumps raw water obtained from an appropriate water source such as a pond or a river to the filtration mechanism. A water purifier for filtering raw water with a reverse osmosis membrane filter to obtain clean water suitable for drinking water, and operating a valve element from outside between the filtration mechanism and the portable pump The pressure regulating valve is opened at the start of the operation of the water purifier, and the valve body is operated from the outside during the subsequent operation, and is a part of the raw water sent from the pump to the filtration mechanism. parts removed to the outside as a relief water, and water supply capacity of the portable pump, by balancing the filtering action force in the reverse osmosis membrane filter, formed as a feature that it has to feed the raw water to the reverse osmosis membrane filter It is intended.

The emergency water purifier according to claim 2 is characterized in that, in addition to the requirement of claim 1 , the portable pump uses a fire fighting pump owned by a voluntary disaster prevention team in each region. It consists of.

Furthermore, the emergency water purifier according to claim 3 is characterized in that, in addition to the requirements of claim 1 or 2 , the relief water taken out from the pressure regulating valve is returned to the water source. It is.

Moreover, in addition to the requirements of the said Claim 1, 2, or 3, the water purifier for emergency of Claim 4 is in operation of the said water purifier, either at the time of an operation start, at the time of an end, or both, In a state in which the outlet for taking out the clean water is closed, the raw water is sent to the filtration mechanism, and the flushing is performed to discharge the impurities captured by the reverse osmosis membrane filter together with the drain water .

The above-described problems can be solved by using the configuration of the invention described in each of the claims. That is, according to the first aspect of the present invention, in the event of an emergency such as a disaster, it is possible to stably secure safe drinking water from a water source that is likely to be consumed, such as water from a river, pond, or pool.
Moreover, the pumping ability of the pump and the force required to filter the raw water through the reverse osmosis membrane filter can be easily balanced, and the raw water can be stably fed into the reverse osmosis membrane filter by the pump.

Further, according to the invention described in claim 2, since the pump for feeding the raw water into the water purification apparatus is premised on the fire fighting pump owned by the voluntary disaster prevention team in each region, it is voluntary for each region at the time of disaster. You can get drinking water. For this reason, for example, in the event of a disaster, even if the main trunk road is cut off and the water truck cannot reach the affected area, it is possible to secure the drinking water for the time being. In addition, if it is the said form which uses the portable fire-fighting pump which a voluntary disaster prevention party owns in this way, drinking water can be ensured independently for every area, and it is thought that the advantage on a disaster prevention measure is also large.

According to the third aspect of the present invention, since the relief water taken out from the pressure regulating valve is returned to the water source such as a pond, the raw water can be effectively used. In the event of a disaster, the amount of raw water, such as pool water, pond water, or remaining water in a bath, may be limited as a source of water (raw water). It is extremely important to use it.

According to the fourth aspect of the present invention, the impurities remaining between the reverse osmosis membranes can be discharged from the drain outlet as drain water, and clogging of the reverse osmosis membrane filter can be effectively prevented. Further, in the maintenance of the reverse osmosis membrane filter, since no chemicals are used in particular, maintenance is extremely easy, the cost can be kept low, and it is advantageous in that it is housed in a disaster prevention warehouse together with a pump.

  The best mode of the present invention is as described in the following examples.

  The emergency water purifier 1 of the present invention is capable of generating safe drinking water from a nearby water source such as a river, a pond or a pool mainly in the event of a disaster. It is. For this reason, as shown in FIG. 1 and FIG. 2 as an example, the emergency water purifier 1 has a portable pump 2 and a water purifier main body 3 as main constituent members, and sucks raw water from a river or the like by the pump. It is pumped to the apparatus body 3 and filtered (purified). In addition, as the filtration mechanism 4 of the water purification apparatus main body 3, the filtration system by the reverse osmosis membrane excellent in the filtration capability is employ | adopted (the reverse osmosis membrane filter 10 actually used is mentioned later).

Here, water from a water source such as a river to be treated is referred to as raw water W, and water that has been filtered by the water purifier main body 3 to become treated water is referred to as clean water P. The clean water P is pure water suitable for drinking and cooking. Further, the water discharged outside from the water purifier main body 3 as the raw water W is filtered, that is, the waste water containing a large amount of impurities captured by the reverse osmosis membrane filter 10 is defined as drain water D.
Examples of the raw water W that can be used as a water source include the above-described rivers, ponds, pool water, and the like, lakes and marshes, water for fire prevention, pond water, and remaining water in a bath. Moreover, if the reverse osmosis membrane filter 10 is for seawater, it is possible to generate drinking water from seawater.

  As described above, the emergency water purifier 1 includes the portable pump 2 and the water purifier main body 3 as main components, and the water purifier main body 3 is as shown in FIGS. In order to take out clean water P from the water supply pipe 20 connected to the portable pump 2, the hose 21 connected to the water supply pipe 20, the pressure regulating valve 22 provided immediately before the filtration mechanism 4, and the filtration mechanism 4. It comprises a flexible hose 23 and the like connected to. Hereinafter, each of these members will be described.

First, the portable pump 2 will be described. This is one that obtains mechanical power from a prime mover or the like, pressurizes raw water W taken from a pond or the like, and sends it to the water purifier main body 3 (filtering mechanism 4). Basically, the portable pump 2 is used. This is because the voluntary disaster prevention team formed for each region usually already has a portable pump 2 for fire fighting. In addition, the portable pump 2 for fire fighting is stored (stored) in a voluntary disaster prevention warehouse in each region, and is usually used for extinguishing fires that occurred in neighboring areas. Then, it is used for water purification equipment at the time of disaster. In addition, such portable pumps 2 for fire fighting have many configurations and weight (dry weight) that can be transported by a small number of people, for example, alone, in order to perform fire extinguishing activities quickly. The property is also extremely high. Incidentally, in this embodiment, as such a portable pump 2 for fire fighting, for example, a C-1 class power portable fire fighting pump having a dry weight of 100 kg or less is applied.
In addition, by applying the portable pump 2 owned by the voluntary disaster prevention team that is in close contact with the area, water supply activities with higher mobility can be performed in the event of a disaster.

Hereinafter, the portable pump 2 for fire fighting will be further described. In general, pumps that supply water under pressure are classified into (A) Turbo type, (B) Constant volume type, and (C) Special type based on the principle. Of these, (A) turbo pumps are further classified into (1) centrifugal pump type and (2) propeller pump type, and (1) centrifugal pump type is further divided into (a) spiral pump and (b). It is classified as a turbine pump.
The Fire Service Law stipulates that the turbo pump of (A) is applied as a pump for digestion equipment, but in reality, the turbine pump of (b) is used exclusively. Therefore, it can be said that the “portable pump 2 for fire fighting” in the present embodiment substantially indicates a centrifugal turbine pump from the classification of pumps.

  Here, the principle of the centrifugal pump of the above (1) will be explained. Energy is given to the water by centrifugal force generated by the high speed rotation of the water wheel-like impeller, and the speed is converted into pressure and sent out. The one with guide vanes is the turbine pump (b), and the one without (1) is the spiral pump. That is, the turbine pump (b) has a streamlined fixed blade (guide blade) outside the impeller, which effectively converts the speed of water into pressure, and becomes a high pressure. It spouts water that has entered the room. In addition, when it is desired to feed water at a higher pressure, an impeller provided with guide vanes is provided in a plurality of stages on the same shaft, and the water pressure is increased by repeating the pressurization. This is a multistage turbine pump. It is. In general, turbine pumps are generally multistage.

  Next, the water pipe 20 will be described. The water supply pipe 20 is connected to the portable pump 2 and transfers the raw water W pumped by the pump toward the filtration main body 4. In this embodiment, since the raw water W is fed from one portable pump 2 to the two reverse osmosis membrane filters 10, the water feeding pipe 20 has a bifurcated branch shape with the discharge port 26 as a double port. is there.

Next, the hose 21 connected to the water pipe 20 will be described. In this embodiment, the raw water W is sent from the water supply pipe 20 to the filtration main body 4 side, and in this embodiment, the discharge pipe 26 of the water supply pipe 20 is connected to the relief pipe 27 having the pressure regulating valve 22. (The pressure regulating valve 22 and the relief pipe 27 will be described later).
In addition, as shown in FIG. 3, for example, as shown in FIG. 3, a one-touch type coupling method is adopted for the connecting portion of the hose 21 (the water supply pipe 20 and the hose 21, and the hose 21 and the relief pipe 27). . Specifically, because it is assumed that a fire pump is used as the portable pump 2, it is frequently used when connecting normal fire hoses with each other or when connecting a normal fire hose to a water outlet or water outlet. Adopted plug-in combination method. This plug-in type coupling is a coupling type comprising a female metal fitting having a protruding claw and a male metal fitting having a jaw (slidable) that takes in and out the claw, and is called a Machino type coupling. The Of course, other one-touch type coupling methods include a screw-in method.

Next, the pressure adjustment valve 22 will be described. The pressure regulating valve 22 is for balancing the water supply capacity of the portable pump 2 with the force required for filtration, that is, the force required to filter the raw water W in the reverse osmosis membrane filter 10. The raw water W fed to the reverse osmosis membrane filter 10 from 2 is partially removed from the valve to adjust both. Here, a part of the raw water W removed by the pressure regulating valve 22 is defined as relief water R. Since the relief water R has substantially the same properties as the water source (raw water W), it is returned here to the water source such as a pond to effectively use the raw water W. This is because the amount of water from the water source (raw water W) is limited particularly during a disaster, and the water source itself can be extremely valuable.
The pressure regulating valve 22 mainly balances the water supply pressure of the portable pump 2 and the filtration pressure in the reverse osmosis membrane filter 10, but at the same time, for example, the balance of the water supply amount per unit time is also balanced. It is presumed to be illustrated. In this way, adjustment is made not only by pressure but also by including the flow rate and the like, and therefore, in the above description, they are described as “ability” and “acting force” in a generic sense.

Hereinafter, the specific configuration of the pressure regulating valve 22 will be further described. For example, as shown in FIG. 3, the pressure regulating valve 22 has a spherical valve body 28 with a flow passage 29 for releasing relief water R, and the valve body 28 is appropriately rotated from the outside by a lever 30 or the like. Thus, the amount of relief water R discharged from the raw water W, that is, the flow rate of the raw water W flowing into the reverse osmosis membrane filter 10 is controlled.
In FIG. 3, the flow path 29 of the valve body 28 is aligned with the discharge side of the relief water R (so-called water flow), and the amount of raw water W toward the reverse osmosis membrane filter 10 is reduced as much as possible. The flow path 29 is closed perpendicularly to the discharge side of the relief water R (so-called water stoppage), and the state where the amount of raw water W toward the reverse osmosis membrane filter 10 is maximized is shown.
The pressure regulating valve 22 is not necessarily limited to such a form, and other valve forms may be employed.

Further, in this embodiment, a pressure regulating valve 22 (relief pipe 27) is provided immediately before each reverse osmosis membrane filter 10, and this method is rational for adjusting the pressure acting on each reverse osmosis membrane filter 10. However, it is possible to provide only one place in the water supply pipe 20 or the like and to balance the water supply capacity of the pump and the working force required for filtration by this single pressure regulating valve 22.
Furthermore, although the pressure regulating valve 22 is provided in the relief pipe 27 here, it is not always necessary to provide the pressure regulating valve 22 in such a tubular member. For example, the pressure regulating valve 22 is separately provided in the intake port 15 of the reverse osmosis membrane filter 10 described later. It is also possible to provide it.
In the experiment conducted by the present applicant, without attempting to intervene with the pressure regulating valve 22, when trying to operate the water purification apparatus simply by connecting the portable pump 2 for fire fighting and the reverse osmosis membrane filter 10 The vacuum of the pump was easy to drop, so that it was in an idle state, and it was difficult to feed the raw water W into the reverse osmosis membrane filter 10. For this reason, the pressure regulating valve 22 is considered to be a very rational and useful member in balancing the water supply capacity of the pump and the force required for filtration.

Next, the filtration mechanism 4 will be described. The filtration mechanism 4 is a substantial part of the water purifier main body 3, and here employs the reverse osmosis membrane method (reverse osmosis membrane filter 10) as described above.
For example, as shown in FIGS. 3 and 4, the reverse osmosis membrane filter 10 has a structure in which a filter main body 12 is built in a substantially cylindrical outer member 11, and the filter main body 12 is formed substantially straight. The tubular shaft core portion 13 and a filtration main body 14 provided around the tube shaft portion and substantially responsible for the filtration action (purification action) are provided.
The filtration main body 14 is formed by winding an ultra-thin film (reverse osmosis membrane) around the tubular shaft core portion 13 in a multilayered state, and the reverse osmosis membrane has small holes (for removing impurities). Many filtration holes are opened. The tubular shaft core portion 13 is also provided with a small hole through which water filtered by a reverse osmosis membrane is passed to the clean water P discharge port (an outlet 16 to be described later).

Here, in the reverse osmosis membrane filter 10, the part to which the raw water W is fed is taken in the inlet 15, the part from which the filtered clean water P is taken out is taken out 16, and the part from which the impurities captured by the reverse osmosis membrane are discharged together with the raw water W is drained. The mouth is 17.
And the raw | natural water W supplied in the reverse osmosis membrane filter 10 from the intake 15 is sent from the one end side (right end side in FIG. 4) of the filtration main body 14 (reverse osmosis membrane), Then, the inside of the filtration main body 14 passes. However, it is transferred to the tubular shaft core portion 13 as the central portion, and is taken out as clean water P from the outlet 16 (left side in FIG. 4).

  In this way, the raw water W is trapped with impurities while passing through the filtration body 14 or the tubular shaft core 13 wound in a laminated state, but most of the impurities are in the filtration body 14, that is, the reverse osmosis membrane in the laminated state. It remains in between. If this residue is left as it is, the filtration main body 14 is clogged, and it is inevitable that the purification function of the reverse osmosis membrane filter 10 is lowered. In this embodiment, the reverse osmosis membrane filter 10 is used before and after use. , The outlet 16 is closed for an appropriate time, and water (raw water W) is drained from the drain port 17. Thereby, impurities remaining between the reverse osmosis membranes become drain water D and flow out of the filter from the drain port 17, and the clogging of the reverse osmosis membrane filter 10 can be effectively prevented. In addition, such an impurity removal operation (flushing) can be performed by supplying (pressure feeding) the raw water W with the outlet 16 closed, for example, about 10 seconds after using the reverse osmosis membrane filter 10 Although it is preferable to carry out for about 5 seconds before, this may be either before or after use.

As an example, the size of the filtration hole in the reverse osmosis membrane filter 10 (filter body 12) is preferably about 0.0001 μm. This is because the size of trihalomethane, which is said to be a carcinogen, is about 0.00038μm, the size of pathogenic organism O-157 is about 3μm, and the heavy metal mercury known to cause Minamata disease. Is about 0.00041 μm, and the size of cadmium, which is the cause of itai-itai disease, is about 0.00035 μm, so that these can be captured (not transmitted). Of course, minerals such as calcium and magnesium pass through the filter holes as they are. Incidentally, as an example of the reverse osmosis membrane type filter body 12, a 2200 gallon standard membrane filter (TW30-4040 model) manufactured by The Dow Chemical Company of America can be applied. Thus, since the reverse osmosis membrane has a very small filtration hole of about 0.0001 μm, the raw water W can be made into clean water P suitable for drinking water simply by filtering without requiring boiling or chemicals. For this purpose, the raw water W needs to be supplied under pressure in order to pass through the reverse osmosis membrane. In the present invention, the portable pump 2 is responsible for this action.
The hollow fiber membranes used in many conventional water purifiers have pores of about 0.1 μm, and it is impossible to capture impurities such as trihalomethane, mercury, and cadmium that are less than this pore size. is there.

Further, the outlet 16 side of the reverse osmosis membrane filter 10 (outer member 11) is closed by a lid member 18, and the lid member 18 is provided with a flexible hose 23 for taking out clean water P or the like ( (See FIG. 3). The flexible hose 23 is preferably provided with an open / close valve 33 for performing the flushing described above. Incidentally, in FIG. 3, the open / close valve 34 is also provided in the flexible hose 23 for discharging the drain water D.
Further, as shown in FIG. 3, for example, as shown in FIG. 3, a flange portion 37 is formed at the connecting portion between the reverse osmosis membrane filter 10 (outer member 11) and the relief tube 27. It is preferable that the ring-shaped joining metal fitting 38 is fitted and tightened with a thumbscrew or the like to strengthen the joining. This is because a high water supply pressure is applied to each part at the time of water supply, so that the connection part can withstand such a high pressure. Of course, it is preferable to employ such a connection form also in the connection portion between the outer member 11 and the lid member 18.
The outer member 11, the relief pipe 27, the water supply pipe 20, etc. are preferably made of stainless steel in consideration of outdoor use, long-term storage in a voluntary disaster prevention warehouse, and the like.

The emergency water purifier 1 of the present invention has the basic structure as described above. Hereinafter, using this water purifier, the drinking water (purified water P) is obtained from a water source (raw water W) such as a river. explain.
(1) Connection of water purifier units To use the emergency water purifier 1 of the present invention in the event of a disaster, etc., raw water W that can be used as a water source, such as a school pool designated as a river, pond or evacuation site, is used. Find (secure) and connect the water purifier components at that location.
Specifically, on the portable pump 2 side, as shown in FIG. 1, a suction pipe (water absorption pipe) 39 for sucking water from the water source is connected, and the end (so-called basket) is connected to the water source (raw water W). It falls into the inside.
Further, on the water purifier main body 3 side, as shown in FIG. 2, a water supply pipe 20, a hose 21, a relief pipe 27, a reverse osmosis membrane filter 10, a lid member 18 including a flexible hose 23, and the like are connected.

(2) Start of pump After connection of each member of a water purifier is completed, the portable pump 2 is driven and the suction of the raw water W is started. At this time, the pressure adjustment valve 22 of the relief pipe 27 is set in an open state, and a part of the raw water W is discharged from the pressure adjustment valve 22 to the outside as the relief water R. The relief water R is preferably returned to the water source (raw water W) side in order to effectively use the water source.

(3) Purification of raw water (filtration)
When the raw water W pressurized and fed to the water purification device main body 3 (reverse osmosis membrane filter 10) by the portable pump 2 is passed through the filtration main body 14, impurities are captured by the reverse osmosis membrane and are purified suitable for drinking water. It becomes water P. In addition, when actually taking out the clean water P from the water purifier, first, the clean water P outlet 16 is closed (closing the open / close valve 33) in accordance with the start of the pump, and flushing is performed for about 5 seconds. For example, it is preferable to discharge the impurities trapped in the reverse osmosis membrane filter 10 together with the drain water D.
And after performing such a flushing suitably, the purified water P purified is utilized as drinking water. Incidentally, once After feeding raw water W in the water purifying apparatus main body 3 is somewhat closes the pressure regulating valve 22 in accordance with the water situation, in which narrow down the flow of relief water R as appropriate.

Note that the filter main body 12 itself is a consumable item and needs to be replaced with a new one when a predetermined total usage time has elapsed. Therefore, if the filter main body 12 itself is within an allowable time, it can be dried after use, and can be used again. For this reason, the use of the water purifier is completed, and once the purified water P is generated. When ending the process, it is preferable to perform flushing again in consideration of subsequent use (for example, for about 10 seconds) to remove impurities captured by the reverse osmosis membrane.
Moreover, in the maintenance management of the reverse osmosis membrane filter 10, since maintenance is extremely easy without using chemicals or the like, the cost can be kept low, and it is convenient in that it is housed in a disaster prevention warehouse together with a pump. It is.

The emergency water purifier 1 of the present invention was developed with a disaster in mind, so the name is also given as “emergency”, but the use is not necessarily limited to a disaster (emergency). It can also be used in normal outdoor situations. In particular, in outdoor activities (camping) by a large number of people due to school events or the like, it is possible to secure a stable amount of clean water P from a river or the like, and it is considered to be a suitable form of drinking water.
Moreover, in this invention, since development was advanced on the assumption that the portable pump 2 was used, also in the said description, the pump was demonstrated as one structural member of a water purifier. However, voluntary disaster prevention teams in each area already have such a portable pump 2 in many cases. Therefore, in such a case, the water purifier main body 3 (including the connection portion) excluding the pump. ) Is the mainstream.

Hereinafter, the excellent filtration performance (effect) of the water purifier 1 for emergency according to the present invention will be described based on specific data shown in FIGS. In this water quality test, the water from Kakegawa Castle Lotus Reservoir, Kakegawa City, Shizuoka Prefecture was used as the raw water W (water source), and the water quality test was conducted by a public organization (Hamamatsu Institute for Environmental Health). .
First, FIG. 5 shows the water quality data of the raw water W itself before filtering, and FIG. 6 shows the water quality data of the clean water P obtained by purifying the raw water W. From each table, the number of general bacteria drops dramatically (becomes zero), and E. coli detected in the raw water W stage is not detected in the clean water P stage, sufficiently clearing the standard value for drinking water. You can see that In addition, generally, from the determination column of each table, the raw water W that was not suitable for drinking water by the emergency water purifier 1 (filtering action) of the present invention becomes clean water P suitable for drinking water. This is objectively understood.
[Other Examples]

The present invention has the above-described embodiment as one basic technical idea, but the following modifications can be considered. In other words, the embodiment shown in FIGS. 1 to 4 has a configuration in which two reverse osmosis membrane filters 10 (filter body 12) are provided in a parallel state, but this mainly includes a stable amount of clean water P. This is a configuration for securing (as an example, about 6 L of clean water P can be secured per minute). However, the number of the reverse osmosis membrane filters 10 can be one or more than three, and the performance of the filtration mechanism 4 (discharge amount, filtration capacity, etc.) is appropriately different. It is possible.
Moreover, in the basic example mentioned above, since the emergency at the time of a disaster with high urgency was mainly assumed, securing of the stable amount of drinking water is given priority. For this reason, the filtration mechanism 4 has adopted a form in which the raw water W is filtered only once through the reverse osmosis membrane filter 10, but when it is desired to produce clean water P with a more delicious and mild taste, Pre-filters and post-filters can be provided before and after the reverse osmosis membrane filter 10. In this case, the reverse osmosis membrane filter 10 is positioned as a main filter, the pre-filter is responsible for pre-filtering the raw water W, such as capturing relatively large impurities, and the post-filter thoroughly removes residual odors and the like. It is what you bear. It is possible to apply a carbon filter as the prefilter and another reverse osmosis membrane filter as the postfilter.

  As a result of various experiments conducted by the present applicant with different numbers and capacities of the reverse osmosis membrane filters 10, if the pressure regulating valve 22 is not provided as described above, the vacuum of the pump is likely to drop, Pumping has been confirmed to be difficult. For this reason, in order to obtain the clean water P stably, the said form which provides the pressure control valve 22 is practical, and it is thought that it is a very rational method.

It is a perspective view which shows together the water purifier for emergency of this invention, and its use condition. It is explanatory drawing which shows the structure of the water purifier for emergency of this invention skeletally. It is a perspective view which mainly decomposes | disassembles and shows the structural member of the water purifier main body. It is sectional drawing (a) which shows the internal structure of a reverse osmosis membrane filter, and a perspective view (b) which shows a filter main body. It is a table | surface which shows the water quality inspection data of the raw | natural water before filtration. It is a table | surface which shows the water quality inspection data of the clean water obtained by filtering raw | natural water with the water purifier of this invention.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Water purifier for emergency 2 Portable pump 3 Water purifier main body 4 Filtration mechanism 10 Reverse osmosis membrane filter 11 Outer member 12 Filter main body 13 Tubular axial core part 14 Filtration main body 15 Intake port 16 Outlet 17 Drain port 18 Lid member 20 Water pipe 21 Hose 22 Pressure adjustment valve 23 Flexible hose 26 Discharge port (of water pipe)
27 Relief pipe 28 Valve body 29 Flow path 30 Lever 33 Open / close valve (clean water side)
34 Open / close valve (drain water side)
37 Flange part 38 Ring joint fitting 39 Suction pipe (water absorption pipe)
D Drain water P Clean water R Relief water W Raw water

Claims (4)

Connect the filtration mechanism including the reverse osmosis membrane filter to the portable pump,
It is a water purification device that obtains clean water suitable for drinking water by pumping raw water obtained from appropriate water sources such as ponds and rivers to a filtration mechanism with a pump and filtering the raw water with a reverse osmosis membrane filter. ,
Between the filtration mechanism and the portable pump, a pressure regulating valve capable of operating the valve body from the outside is provided,
The pressure regulating valve is opened at the start of operation of the water purifier, and during the subsequent operation, the valve body is operated from the outside, and a part of the raw water sent from the pump to the filtration mechanism is taken out as relief water. The emergency water purifier is characterized in that the water supply capacity of the portable pump and the filtering action force in the reverse osmosis membrane filter are balanced to feed raw water into the reverse osmosis membrane filter . The friendly transportable pump, emergency water purification device according to claim 1, wherein the voluntary disaster prevention Corps each region was made to use the fire pump owned. The emergency water purifier according to claim 1 or 2, wherein the relief water taken out from the pressure regulating valve is returned to the water source. In operating the water purification apparatus, at one or both of the start and the end of the operation, the raw water was sent to the filtration mechanism with the outlet for taking out the clean water closed, and was captured by the reverse osmosis membrane filter. 4. The emergency water purifier according to claim 1, 2 or 3, wherein flushing is performed to discharge impurities together with drain water.

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