JP2013015446A - Water purification device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a water purification device for removing radioactive substances with a simple structure and without a power source.SOLUTION: The water purification device includes a first water tank 2; a second water tank 3 arranged below the first water tank 2; a ceramic filter 4 which is arranged inside the first water tank 2, and in which an internal capsule member 14 composed of active carbon is stored in a container 13 composed of sintered diatomaceous earth; and a zeolite filter 5 which is arranged in the second water tank 3, and in which an upper layer section 17 composed of zeolite and a lower layer section 18 composed of active carbon are stored in a housing container 16. Raw water charged in the first water tank 2 and containing the radioactive substances is passed through the ceramic filter 4, is guided to the second water tank 3 thereafter, and is further passed through the zeolite filter 5 with its own weight. Thus the raw water becomes water in which the radioactive substances are removed.

Description

  The present invention relates to a water purification device, and more particularly to a water purification device capable of removing radioactive substances.

  Radioactive materials are said to have a negative effect on the human body and must be removed before touching the human body. In particular, when water containing a radioactive substance is used for drinking or the like, the radioactive substance is directly taken into the human body, which is a problem.

  Conventionally, as a water purification apparatus capable of removing a radioactive substance from water containing the radioactive substance, one disclosed in Patent Document 1 is known. This water purification device is intended to remove the radioactive substance from the waste liquid containing the radioactive substance, and transports the waste liquid by a pump so that the ion exchange resin being irradiated with the ultraviolet light is touched. To remove radioactive material.

JP 11-264896 A

  However, since the water purification apparatus disclosed in Patent Document 1 requires a pump, an ultraviolet ray generator, and the like, the apparatus becomes large and difficult to use at home or the like. Further, the water purification device requires a power source for supplying power to a pump, an ultraviolet ray generator, and the like. Therefore, there is a problem that it cannot be used during a power failure.

  The present invention has been made for the purpose of solving the above-described problems, and has an object of providing a water purification device that has a simple structure and can remove radioactive substances without requiring a power source.

  In order to achieve the above object, a water purification apparatus according to claim 1 is provided with a first water tank, a second water tank disposed below the first water tank, and the first water tank. A ceramic filter containing an encapsulating member made of activated carbon in a container portion made of diatomaceous earth, and an upper layer portion made of zeolite and a lower layer portion made of activated carbon, which are arranged in the second water tank, are housed in the containing container. Zeolite filter, and the raw water containing the radioactive substance introduced into the first water tank is introduced into the second water tank after passing through the ceramic filter by its own weight, and further, the zeolite By passing through a filter, the water is removed from the radioactive substance.

  The water purification apparatus according to claim 1, wherein the raw water containing the radioactive substance is allowed to pass through the ceramic filter in the first water tank due to its own weight, and further to the second water tank disposed below the first water tank. By introducing and further passing through a zeolite filter disposed in the second water tank, it is possible to obtain water from which radioactive substances have been removed. Therefore, this water purification device does not require the use of a pump or the like, and can be used at home because it has a simple structure. It also eliminates radioactive substances from raw water even during a power failure because it does not require a power source. be able to.

The perspective view which shows the water purification apparatus which concerns on this invention. The principal part expanded sectional view of the water purification apparatus which concerns on this invention. It is an enlarged view of a ceramic filter, (a) top view, (b) bottom view, (c) bottom view. It is an enlarged view of a zeolite filter, (a) top view, (b) bottom view, (c) bottom view. It is an enlarged view of the zeolite filter of another shape, (a) Top view, (b) Bottom view, (c) Bottom view.

  Hereinafter, embodiments of the present invention will be described with reference to the drawings. As shown in FIGS. 1 and 2, the water purification apparatus 1 of the present invention includes a first water tank 2 into which raw water containing a radioactive substance is introduced, and a second water tank 3 disposed below the first water tank 2. And a ceramic filter 4 disposed in the first water tank 2 and a zeolite filter 5 disposed in the second water tank 3.

  As shown in FIGS. 1 and 2, the first water tank 2 contains raw water, is made of a transparent or translucent material, and has a cylindrical main body 6 and an upper end of the main body 6. It has a disc-shaped lid 7 that is placed and removable, and a connecting portion 8 that is attached to the lower end of the main body 6 with waterproofness.

  As shown in FIG. 1, the connection portion 8 has a cylindrical shape, and has a top plate 8 a that closes the lower end of the main body portion 6 in the vicinity of the upper end and prevents raw water from leaking to the outside. The top plate 8a has a through hole 8b formed in the center for guiding the water that has passed through the ceramic filter 4 to the second water tank 3, and an annular recess concentric with the through hole 8b. An accommodation portion 8c that is formed on the upper surface side of 8a and accommodates the lower portion of the ceramic filter 4 and a packing accommodation portion 8d that is formed as an annular recess at the upper end side of the through hole 8b and accommodates the packing 20 are provided. It has been.

  As shown in FIGS. 1 and 2, the second water tank 3 is made of a transparent or translucent material, and has a main body 9 for containing water from which radioactive substances have been removed by the ceramic filter 4 and the zeolite filter 5. A pedestal 10 attached to the lower end of the main body portion 9 with waterproofness, and a faucet 11 attached to the side surface of the main body portion 9 and used when taking out the water in the second water tank 3 to the outside, have.

  As shown in FIG. 1, the main body 9 has a cylindrical shape, and as shown in FIG. 2, a top plate 9 a on which an adapter 12 used for fixing the zeolite filter 5 is mounted on the upper end. Have. A through hole 9b for receiving water from the first water tank 2 that has passed through the ceramic filter 4 is provided at the center of the top plate 9a.

  As shown in FIG. 1, the pedestal 10 has a cylindrical shape, and has a top plate 10 a that closes the lower end of the main body 9 at the upper end and prevents the water in the main body 9 from leaking to the outside.

  As shown in FIG. 2, the adapter 12 includes an annular flange 12 a and a cylindrical protrusion 12 b that protrudes downward from the flange 12 a and passes through the through hole 9 b of the main body 9. On the inner peripheral side near the lower end of the projecting portion 12b, a female screw used for fixing the zeolite filter 5 is formed.

  The ceramic filter 4 is disposed in the first water tank 2 as shown in FIG. 1 and has a dome-like appearance and a hollow portion as shown in FIGS. The container part 13 opened downward, the inner member 14 accommodated in the hollow part of the container part 13, and the lid part 15 closing the opening part of the container part 13 are provided.

  The said container part 13 has water permeability, and is comprised by sintering diatomaceous earth. The container portion 13 is preferably configured using diatomaceous earth having an average particle diameter of 0.5 μm or more and 0.8 μm or less. This is because if the average particle size is too small, clogging is likely to occur, and if it is too large, the effect of removing the radioactive substance is reduced. Further, the container 13 performs maintenance by scraping the surface when dirt adheres to the container 13 or becomes clogged. For this reason, if the wall thickness TC shown in FIG. 2 is too thin, the container section 13 is reduced in the number of times that maintenance can be performed. Therefore, it is preferable that the container part 13 initially has a wall thickness of about 10 mm.

  The inclusion member 14 is made of activated carbon, and is particularly preferably made of granular coconut shell activated carbon having a mesh size of 25 mesh or more and 30 mesh or less. In this way, by configuring the inclusion member 14, a sufficient radioactive substance removing effect is exhibited.

  As shown in FIGS. 2 and 3, the lid portion 15 is made of a non-permeable material, and has a cylindrical protruding portion 15 a that protrudes downward in the center and has a male screw formed in the outer peripheral portion. Yes. The protruding portion 15a discharges water that has passed through the container portion 13 and the inner packaging member 14 through a through hole provided in the center.

  The zeolite filter 5 is disposed in the second water tank 3 as shown in FIG. 1, and is attached to the adapter 12 on the outer periphery near the upper end as shown in FIGS. An impermeable container 16 made of a cylindrical, transparent or translucent material with a male screw formed thereon, an upper layer portion 17 accommodated in an upper layer inside the container 16, and the interior of the container 16 The lower layer 18 accommodated in the lower layer of the container and the lower container 18 are attached in the vicinity of the lower end of the container 16 to prevent the upper layer 17 and the lower layer 18 from flowing out of the container 16 and the upper layer 17 and the lower layer. And a bottom plate 19 formed with small holes through which water that has passed through 18 flows out.

  The upper layer portion 17 is preferably made of zeolite, and particularly made of zeolite having an average particle diameter of about 3 mm by pulverization. This is because if the average particle size is too small, clogging is likely to occur, and if it is too large, the effect of removing the radioactive substance is reduced. The upper layer portion 17 may be configured using zeolite that has been subjected to impurity removal processing or the like, but may be configured using raw zeolite ore as it is.

  The lower layer portion 18 is made of activated carbon, and is preferably made of granular coconut shell activated carbon having a particle size of 25 mesh or more and 30 mesh or less, like the enclosing member 14 of the ceramic filter 4. In this way, by configuring the lower layer portion 18, a sufficient radioactive substance removing effect is exhibited.

  As described above, an assembling method of the water purification apparatus 1 of the present invention in which each part is configured will be described. First, as shown in FIG. 2, the ceramic filter 4 contains a packing 20 that prevents raw water from flowing out of the first water tank 2 in the packing housing part 8 d of the connection part 8 of the first water tank 2, and then a lid. The protruding portion 15a of the portion 15 is inserted into the through hole 8b of the connecting portion 8 and placed on the top plate 8a of the connecting portion 8 so that the lower portion is accommodated in the accommodating portion 8c of the connecting portion 8. Furthermore, after inserting the packing 20 from the lower end of the projecting portion 15a, the nut 21 is fastened to the projecting portion 15a to fix it to the top plate 8a, thereby assembling the first water tank 2.

  In addition, the zeolite filter 5 first has a male screw formed near the upper end of the container 16 screwed into a female screw formed near the lower end of the protrusion 12b of the adapter 12, as shown in FIG. To fix to the adapter 12. The adapter 12 to which the zeolite filter 5 is fixed is inserted into the through hole 9b formed in the top plate 9a of the main body portion 9 of the second water tank 3 with the projecting portion 12b together with the zeolite filter 5, and the flange portion 12a is The second water tank 3 is assembled by placing it so as to contact the top plate 9a.

  As shown in FIG. 1, the first water tank 2 with the ceramic filter 4 assembled thereon is placed above the second water tank 3 with the zeolite filter 5 assembled. Assembly is complete.

  Next, purification of raw water by the water purification apparatus 1 of the present invention will be described. First, the lid portion 7 of the first water tank 2 shown in FIG. 1 is removed, and raw water containing one or more kinds of radioactive substances such as iodine 131, cesium 134, cesium 137, etc. is poured into the first water tank 2. At this time, it is desirable to put the water purification solution into the first water tank 2 together with the raw water. The water purification solution contains various mineral components such as sulfur, iron, magnesium, calcium, and manganese. When the water purification solution is introduced into the first water tank 2 together with the raw water, the mineral component exhibits a cohesive effect. And the radioactive substance removal effect of this water purification apparatus 1 can be heightened.

  The raw water and the water purification solution charged into the first water tank 2 pass through the container part 13 and the inclusion member 14 of the ceramic filter 4 due to their own weight, and the protruding part 15a provided on the lid part 15 of the ceramic filter 4 It is discharged from the through hole formed in the.

  The water discharged from the protruding portion 15a of the lid portion 15 of the ceramic filter 4 is introduced into the second container 3 through the through-hole formed in the adapter 12, and is guided into the storage container 16 of the zeolite filter 5, The zeolite filter 5 passes through the upper layer portion 17 and the lower layer portion 18, is discharged from the bottom plate 19, and accumulates in the second water tank 3. The water accumulated in the second water tank 3 is water that has been purified by removing radioactive substances from the raw water due to the effects of the ceramic filter 4 and the zeolite filter 5. In addition, since the purified water collected in the second water tank 3 has impurities and harmful substances other than radioactive substances removed by the ceramic filter 4 and the zeolite filter 5, the faucet 11 is used for the outside. It can be used for taking out and drinking.

  As described above, since the water purification apparatus 1 of the present invention described above does not require a power source, even when a disaster such as a power failure occurs, the raw water containing the radioactive material is purified to remove the radioactive material. be able to. Moreover, since this water purification apparatus 1 is a simple structure, it can be used also at home.

  EXAMPLES Hereinafter, although an Example demonstrates this invention more concretely, this invention is not limited at all by these Examples.

  In order to verify the performance of the water purification apparatus 1 of the present invention, a purification test of raw water containing iodine 131 which is a radioactive substance was performed. The raw water used was collected from a swamp located about 1 km northwest of Fukushima Daini Power Station (Futaba-gun, Futaba-gun, Futaba-gun).

  The used ceramic filter 4 has an outer diameter DC of 100 mm and a height HC of 90 mm shown in FIGS. Moreover, the wall thickness TC of the container part 13 shown in FIG. 2 is 10 mm, and the average particle diameter of the diatomaceous earth which comprises this container part 13 exists in the range of 0.5 mm or more and 0.8 mm or less. In addition, the inclusion member 14 is made of granular coconut shell activated carbon in a range of 25 mesh or more and 30 mesh or less.

  The zeolite filter 5 used is an upper layer portion 17 made of crushed zeolite ore having an average particle diameter of about 3 mm in the container 16 of the thinnest portion shown in FIGS. The lower layer portion 18 made of granular coconut shell activated carbon within a range of 25 mesh or more and 30 mesh or less is accommodated so that the height HZ1 is 80 mm. is there.

  Table 1 shows the result of the water purification test of the raw water by the water purification apparatus 1 of the present invention using the ceramic filter 4 and the zeolite filter 5. In addition, raw | natural water is thrown into the 1st water tank 2 with the said water quality purification liquid, The ratio is 1 cc of water quality purification liquid with respect to 3 liters of raw water.

  As is clear from Table 1 above, iodine 131, which is a radioactive substance detected in the raw water, decreased to the detection lower limit (20 Bq / kg) or less by purification by the water purification apparatus 1 of the present invention. Thereby, the removal effect of the radioactive substance of the water purification apparatus 1 of this invention was confirmed.

  In the above description, the zeolite filter 5 to be used is an upper layer portion 17 made of a crushed zeolite rough having an average particle diameter of about 3 mm in the container 16 of the thinnest portion of the outer diameter DZ70 mm shown in FIG. And the lower layer 18 composed of granular coconut shell activated carbon in the range of 25 mesh or more and 30 mesh or less so that the height HZ1 is 40 mm and the height HZ2 is 30 mm. Even in this case, it has been confirmed that the radioactive substance removal effect is exhibited.

  The water purification apparatus 1 of the present invention described above is only one aspect of the water purification apparatus according to the present invention, and various modifications can be made without departing from the gist of the present invention.

  For example, the zeolite filter 5 may be directly attached to the connection part 8 of the first water tank 2 or the top plate 9 a of the main body part 9 of the second water tank 3 without using the adapter 12. Even in this case, the zeolite filter 5 is guided to the zeolite filter 5 after the raw water introduced into the first water tank 2 passes through the ceramic filter 4, passes through the upper layer portion 17 and the lower layer portion 18, and then passes through the first filter tank 5. 2 The attachment is performed so as to collect in the main body 9 of the water tank 3.

  The water purification apparatus according to the present invention can be used as a water purification apparatus for removing radioactive substances.

DESCRIPTION OF SYMBOLS 1 Water purification apparatus 2 1st water tank 3 2nd water tank 4 Ceramic filter 5 Zeolite filter 13 Container part 14 Inclusion member 17 Upper layer part 18 Lower layer part

Claims (1)

A first aquarium,
A second water tank disposed below the first water tank;
A ceramic filter disposed in the first water tank and containing an encapsulating member made of activated carbon in a container portion made of sintered diatomaceous earth;
A zeolite filter disposed in the second water tank, and containing an upper layer portion made of zeolite and a lower layer portion made of activated carbon in a storage container,
The raw water containing the radioactive substance introduced into the first water tank is passed through the ceramic filter by its own weight, and then introduced into the second water tank, and further passed through the zeolite filter. A water purification apparatus, wherein water is removed from the radioactive substance.

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