JP2013185883A - Liquid clarification apparatus, liquid clarification system, and vehicle for liquid clarification - Google Patents

Abstract

PROBLEM TO BE SOLVED: To avoid reduction in operation efficiency when an absorbent of liquid is replaced for clarification of liquid containing radioactive matter.SOLUTION: A liquid clarification apparatus 1 comprises: a filtration cartridge 2 that is a cylindrical container filled with an absorbent having openings at both ends and through which liquid flows from the opening at the one end to the opening at the other end; a case 3 having a cylindrical structure for storing the filtration cartridge 2 and having an inlet port 3Ha into which the filtration cartridge 2 is inserted at one end portion 3TA thereof, a liquid injection port 5 through which liquid is supplied to the filtration cartridge 2, and a liquid outlet port 6 through which the liquid that has passed the filtration cartridge 2 is discharged to the outside of the liquid clarification apparatus 1; and a cover 4 for closing the inlet port 3Ha. The filtration cartridge 2 is replaceable.

Description

  The present invention relates to a liquid purification apparatus, a liquid purification system, and a liquid purification vehicle for purifying a liquid containing a radioactive substance.

  There is a technique for adsorbing and removing ionic contaminants by ion exchange resin from contaminated water containing radionuclides and other contaminants in an ionic state (for example, Patent Document 1).

JP 2004233330 A

  The technique described in Patent Document 1 is to add an ion exchange resin in a hopper into a treatment tank. For this reason, it takes time and effort to replace the ion exchange resin used for removing radioactive substances.

  An object of the present invention is to suppress a decrease in work efficiency when a liquid adsorbent is replaced when purifying a liquid containing a radioactive substance.

  In the present invention, a cylindrical container having openings at both ends is filled with an adsorbent, and the liquid flows from the opening at one end, and the liquid flows out from the opening at the other end. A filtration cartridge that stores the filtration cartridge, an inlet that houses the filtration cartridge at one end, a liquid inlet that supplies the liquid to the filtration cartridge, and the filtration The filter cartridge is replaceable, and includes a casing having a liquid outlet for discharging the liquid that has passed through the cartridge to the outside of the structure, and a lid for closing the inlet. It is a liquid purification device.

  In this way, by arranging the filtration cartridge filled with the adsorbent material in the casing so as to be exchangeable, the filtration cartridge can be easily exchanged for each zeolite particle as the adsorbent material. When purifying a liquid containing a radioactive substance, it is possible to suppress a decrease in work efficiency when replacing the liquid adsorbent.

  In the present invention, the filtration cartridge preferably includes a filter at both ends. The filter can remove dust having a relatively large size contained in the liquid before allowing the liquid to pass through the adsorbent. As a result, it is possible to suppress a decrease in the filtration capacity of the adsorbent.

  In the present invention, the container is preferably an iron-based material. If it does in this way, the amount of oxygen in a container can be controlled by oxidation of iron.

  In the present invention, the container is preferably a resin-based material. If it does in this way, the manufacturing cost of a filtration cartridge can be reduced.

  In this invention, it is preferable to have an elastic body that is interposed between the lid and the filtration cartridge and applies a pressing force to both. By doing so, the filtration cartridge is securely held in the housing.

  In the present invention, the adsorbent is preferably at least one of zeolite particles and ferrocyanide adsorbent. By doing in this way, a radioactive substance can be more reliably removed from a liquid.

  The present invention includes a plurality of the liquid purification devices described above, the plurality of liquid purification devices are connected so that the liquid sequentially flows, and at least two of the liquid purification devices have different adsorbents. This is a liquid purification system. Since this liquid purification system includes the above-described liquid purification device, it is possible to suppress a decrease in work efficiency when the liquid adsorbent is replaced when purifying a liquid containing a radioactive substance.

  In the present invention, it is preferable that at least two of the plurality of liquid purifying apparatuses have adsorbents having different radioactive substance adsorption capacities. In this way, different types of radioactive materials can be removed.

  In the present invention, a liquid supply device for supplying the liquid to the liquid purification device, a gas supply device for supplying gas to the filtration cartridge of the liquid purification device and removing the liquid in the filtration cartridge, It is preferable to contain. By doing in this way, the liquid in a filtration cartridge can be removed by supplying gas to a filtration cartridge from a gas supply apparatus at the time of exchange of a filtration cartridge. As a result, the filtration cartridge can be easily replaced.

  In this invention, it is preferable to have an alerting device for notifying that it is time to replace the filtration cartridge when the dose from the filtration cartridge exceeds a predetermined value. In this way, it is possible to easily know the replacement time of the filtration cartridge.

  The present invention is a liquid purification vehicle equipped with the above-described liquid purification system. Since this liquid purification vehicle includes the above-described liquid purification system, it is possible to suppress a decrease in work efficiency when the liquid adsorbent is replaced when purifying the liquid containing the radioactive substance.

  In the present invention, it is preferable that a radiation shield is provided between the cab and the liquid purification system. By doing in this way, the radiation which goes to the cab from the filtration cartridge with which a liquid purification apparatus is provided can be shielded.

  The present invention can suppress a decrease in work efficiency when a liquid adsorbent is replaced when purifying a liquid containing a radioactive substance.

FIG. 1 is a side view showing a liquid purification apparatus according to the present embodiment. FIG. 2 is a cross-sectional view illustrating the liquid purification apparatus according to the present embodiment. FIG. 3 is a cross-sectional view showing another example of the liquid purification apparatus according to the present embodiment. FIG. 4 is a perspective view of a filtration cartridge included in the liquid purification apparatus according to the present embodiment. FIG. 5 is a cross-sectional view of a filtration cartridge included in the liquid purification apparatus according to the present embodiment. FIG. 6 is a configuration diagram of a liquid purification system having the liquid purification apparatus according to the present embodiment. FIG. 7 is a diagram illustrating an example of piping of the liquid purification apparatus included in the liquid purification system according to the present embodiment. FIG. 8 is a diagram illustrating an example of piping of the liquid purification apparatus included in the liquid purification system according to the present embodiment. FIG. 9 is a diagram illustrating an example of piping of the liquid purification apparatus included in the liquid purification system according to the present embodiment. FIG. 10 is a side view showing a liquid purification vehicle equipped with the liquid purification system according to the present embodiment. FIG. 11 is a plan view showing a liquid purification vehicle equipped with the liquid purification system according to the present embodiment.

  Hereinafter, embodiments (embodiments) for carrying out the present invention will be described in detail with reference to the drawings.

  FIG. 1 is a side view showing a liquid purification apparatus according to the present embodiment. FIG. 2 is a cross-sectional view illustrating the liquid purification apparatus according to the present embodiment. The liquid purification apparatus 1 is an apparatus that removes a radioactive substance from a liquid (for example, water) containing the radioactive substance and purifies it. Examples of the liquid containing a radioactive substance include water discharged from a nuclear facility such as a nuclear power plant. The liquid purification device 1 includes a filtration cartridge 2, a housing 3, and a lid 4. The filtration cartridge 2 is filled with zeolite particles as an adsorbent. The structure of the filtration cartridge 2 will be described later.

  The housing 3 is a cylindrical (cylindrical in this embodiment) structure that houses the filtration cartridge 2. The housing 3 is made of a material having high corrosion resistance because it contacts the liquid Wb. In the present embodiment, the housing 3 is made of stainless steel. In the present embodiment, the housing 3 accommodates a plurality (five) of filtration cartridges 2. The housing 3 includes an inlet 3Ha, a liquid inlet 5, a liquid outlet 6, and an outlet 3Hb. The insertion port 3Ha is an opening provided at one end 3TA of the housing 3. The filtration cartridge 2 is accommodated in the housing 3 through the insertion port 3H. The other end 3TB of the housing 3 is sealed by a bottom 3BP attached to this portion. The outlet 3Hb is an opening that appears when the bottom 3BP is removed. The filtration cartridge 2 accommodated in the housing 3 is taken out from the outlet 3Hb.

  The housing 3 has a liquid inlet 5 that supplies liquid (liquid before filtration) Wb to the filtration cartridge 2 housed in the housing 3 on one end 3TA side. Further, the housing 3 has a liquid outlet 6 on the other end 3TB side for discharging the liquid (liquid after filtration) Wa that has passed through the filtration cartridge 2 housed in the housing 3 to the outside of the housing 3. Have. In the present embodiment, the liquid outlet 6 is attached to the bottom 3BP.

  The lid 4 is attached to one end 3TA of the housing 3 in which the prescribed number of filtration cartridges 2 are housed, and closes the insertion port 3H. Between the lid 4 and the housing 3, a lid-side O-ring 4P for sealing the gap between the two is provided. With such a structure, the filtration cartridge 2 is sealed in the housing 3, and the liquid Wb introduced into the housing 3 from the liquid inlet 5 is supplied to the filtration cartridge 2. The liquid Wb is discharged from the liquid outlet 6 after the radioactive substance is removed in the process of passing through the filtration cartridge 2.

  The housing 3 has flange portions 3Fa and 3Fb projecting outward in the radial direction of the housing 3 at one end 3TA and the other end 3TB, respectively. The lid 4 is attached by a bolt 7 to the flange portion 3Fa on the one end portion 3TA side. The bottom 3BP is formed by attaching a bottom flange 3BF protruding from one end to the outside in the radial direction of the bottom 3BP to a flange 3Fa provided on the other end 3TB side of the housing 3 with a bolt 9. It is attached to the body 3. The structure for fixing the lid 4 and the bottom 3BP to the housing 3 is not limited to this. For example, an O-ring or the like is disposed as a sealing member between the bottom 3BP and the housing 3.

  Inside the housing 3, an inlet side strainer 8 is disposed on the lid 4 side. Moreover, the exit side strainer 12 is attached to the other end 3TB side. In disposing the filtration cartridge 2 in the housing 3, the bottom 3 BP in which the outlet side strainer 12 is disposed is attached to the other end 3 TB of the housing 3. As shown in FIG. 2, since the protrusion 3IT with which the outlet side strainer 12 is engaged is provided inside the bottom 3BP, the outlet side strainer 12 is positioned by this protrusion 3IT. Then, after the prescribed number of filtration cartridges 2 are arranged in the housing 3, the inlet side strainer 8 is finally arranged. Then, the lid 4 is attached to the insertion port 3H of the housing 3.

  Between the lid 4 and the filtration cartridge 2, a spring having a free length longer than the distance between the lid 4 and the inlet side strainer 8 and generating a repulsive force when contracting may be disposed. In this way, when the lid 4 is attached to the housing 3, the spring applies a pressing force to the lid 4 and the inlet side strainer 8. This pressing force is transmitted to the filtration cartridge 2 via the inlet side strainer 8. Thus, by providing a spring between the lid 4 and the inlet side strainer 8, a pressing force is applied to the lid 4 and the filtration cartridge 2, and the filtration cartridge 2 is held in the housing 3.

  Each of the inlet side strainer 8 and the outlet side strainer 12 has a net for removing dust and the like in the liquid. A strainer O-ring 10 is attached to the outer peripheral portion of the inlet side strainer 8. When the inlet side strainer 8 is attached to the housing 3, the strainer O-ring 10 is interposed between the outer peripheral surface of the inlet side strainer 8 and the inner peripheral surface of the housing 3, and the liquid Wb passes between the two. Inflow into the housing 3 is prevented. When a plurality of filtration cartridges 2 are stacked in the housing 3, cartridge O-rings 11 are provided between adjacent filtration cartridges 2. The cartridge O-ring 11 prevents the liquid Wb from leaking between the adjacent filtration cartridges 2 when the liquid Wb moves between the adjacent filtration cartridges 2. With such a structure, the liquid purification apparatus 1 can reliably supply the liquid Wb to be purified to the filtration cartridge 2 in the housing 3.

  FIG. 3 is a cross-sectional view showing another example of the liquid purification apparatus according to the present embodiment. This liquid purification apparatus 1A has the same structure as the liquid purification apparatus 1 described above, but differs in that one filtration cartridge 2 is housed inside the housing 3. Accordingly, the structures of the housing 3A and the lid 4A are different. The housing 3A is a cylindrical structure, and a lid 4A is attached to one end 3TA side, and a bottom 3PB is provided on the other end 3TB side. The lid 4 </ b> A is attached to the flange portion 3 </ b> AF that protrudes from the one end portion 3 </ b> TA to the outer side in the radial direction of the housing 3 by the bolt 7. Between the lid 4 and the housing 3A, a lid-side O-ring 4P for sealing the gap between the two is provided.

  An outlet side strainer 12 is attached to the inside of the other end 3TB side. An inlet side strainer 8 is disposed on the lid 4A side. A bracket 15 is attached to the lid 4 </ b> A on the surface opposite to the surface facing the inlet side strainer 8. An arm 17 is attached to the bracket 15 via a pin 16. The lid 4A is attached to and detached from the housing 3A via the arm 17.

  The liquid purification apparatus 1 </ b> A includes a tension spring 13 that connects the lid 4 </ b> A and the filtration cartridge 2. One end of the tension spring 13 is attached to the lid 4 </ b> A, and the other end is attached to a handle 14 provided on one end side of the filtration cartridge 2. The tension spring 13 applies a tension force between the lid 4 </ b> A and the inlet side strainer 8. When the filtration cartridge 2 is arranged inside the housing 3A, the lid 4A and the filtration cartridge 2 are connected via the tension spring 13 and the filtration cartridge 2 is arranged in the housing 3A. Attach to 3. When removing the filtration cartridge 2 from the housing 3A, when the lid 4A is removed from the housing 3A, the filtration cartridge 2 is pulled to the lid 4A by the tension spring 13, so that the filtration cartridge 2 is removed from the inside of the housing 3A. Thus, the liquid purification apparatus 1A can easily replace the filtration cartridge 2.

  A cartridge O-ring 11 is provided between the inlet side strainer 8 and the filtration cartridge 2 and between the outlet side strainer 12 and the filtration cartridge 2. As shown in FIG. 3, the outlet side strainer 12 is engaged with the protrusion 3IT provided inside the bottom 3BP, and is positioned by the protrusion 3IT. The cartridge O-ring 11 prevents the liquid Wb from leaking between the adjacent filtration cartridges 2 when the liquid Wb moves between the adjacent filtration cartridges 2. Next, the filtration cartridge 2 will be described.

  In the present embodiment, filters 22 are attached to both ends 2T and 2T of the container 21, respectively. The filter 22 is provided with a filtering part 22M in the opening, and is a sintered metal filter or a resin filter in the present embodiment. The fineness of the filter 22M is about 100 mesh, for example. The filter 22 removes dust having a relatively large size contained in the liquid before allowing the liquid to pass through the zeolite particles 23. By doing in this way, the fall of the filtration capability of the zeolite particle 23 can be suppressed.

  For example, an iron-based material can be used for the container 21. In this way, the amount of oxygen in the container 21 can be suppressed by iron oxidation, which is preferable for long-term storage of the filtration cartridge 2. Further, for example, a resin material can be used for the container 21. In this way, the manufacturing cost of the filtration cartridge 2 can be reduced.

  The filtration cartridge 2 is removed by adsorbing radioactive material in the liquid with the zeolite particles 23 filled in the container 21. By making the type of the zeolite particles 23 filled in the container 21 different, the type of radioactive substance removed by the filtration cartridge 2 can be changed. In the present embodiment, for example, Cs, Sr, I, and the like are removed, and therefore the zeolite particles 23 that adsorb these are filled in the container 21.

  The particle diameter of the zeolite particles 23 filled in the container 21 is preferably uniform. In the present embodiment, the zeolite particles 23 have a particle size corresponding to 40 mesh to 60 mesh. The particle diameter of the zeolite particles 23 is not limited to the above-described range, and can be appropriately changed according to the type of liquid to be purified. In the present embodiment, the characteristics of the filtration cartridge 2 can be changed by changing the size of the particle diameter of the zeolite particles 23 filled in the container 21.

  The filtration cartridge 2 is disposed in the casings 3 and 3A of the liquid purification apparatuses 1 and 1A, and purifies the liquid containing the radioactive substance. Further, as described above, since the filtration cartridge 2 can be exchanged in the liquid purification devices 1 and 1A, the filtration cartridge 2 after removing the radioactive substance can be simply exchanged or replaced by another place to easily obtain the filtration cartridge 2. Can be exchanged. Furthermore, since the liquid purification apparatuses 1 and 1A have the replacement structure as described above, the filtration cartridge 2 having a reduced filtration capacity can be easily replaced. For this reason, the liquid purification apparatuses 1 and 1A can improve the efficiency of the liquid purification work. As a result, the liquid purification apparatus 1 can suppress exposure to a low level.

  FIG. 6 is a configuration diagram of a liquid purification system having the liquid purification apparatus according to the present embodiment. 7-9 is a figure which shows the example of piping of the liquid purification apparatus which the liquid purification system which concerns on this embodiment has. The liquid purification system 30 includes a plurality of the liquid purification apparatuses 1 and 1A described above, the plurality of liquid purification apparatuses 1 and 1A are connected so that the liquid Wb flows sequentially, and the liquid purification apparatuses 1Aa, 1Ab, and 1Ac are respectively adsorbed. It has zeolite particles with different performance. The liquid purification apparatuses 1ma, 1mb, and 1mc and the liquid purification apparatuses 1fa, 1fb, and 1fc also have zeolite particles having different adsorption capacities. In the present embodiment, at least two of the plurality of liquid purification apparatuses 1 and 1A included in the liquid purification system 30 may have zeolite particles having different adsorption capacities. Hereinafter, when it is not necessary to distinguish between the liquid purification apparatuses 1Aa, 1Ab, and 1Ac, they are referred to as a liquid purification apparatus 1A. Moreover, when it is not necessary to distinguish the liquid purification apparatuses 1ma, 1mb, 1mc, 1fa, 1fb, and 1fc, they are referred to as the liquid purification apparatus 1.

  In this embodiment, the liquid purification apparatuses 1Aa, 1ma, and 1fa, the liquid purification apparatuses 1Ab, 1mb, and 1fb, and the liquid purification apparatuses 1Ac, 1mc, and 1fc adsorb different radioactive substances as zeolite particles having different adsorption capacities. Have zeolite particles. In the present embodiment, the liquid purification apparatuses 1Aa, 1ma, and 1fa adsorb Cs, the liquid purification apparatuses 1Ab, 1mb, and 1fb adsorb Sr, and the liquid purification apparatuses 1Ac, 1mc, and 1fc adsorb I. For this reason, the liquid purification apparatuses 1Aa, 1ma, and 1fa, the liquid purification apparatuses 1Ab, 1mb, and 1fb, and the liquid purification apparatuses 1Ac, 1mc, and 1fc have different types of zeolite particles.

  As shown in FIGS. 7 to 9, the liquid purification system 30 includes a plurality of liquid purification apparatuses 1 or a plurality of liquid purification apparatuses such that the liquid Wb sequentially flows through the plurality of liquid purification apparatuses 1 or the plurality of liquid purification apparatuses 1A. 1A is connected in series by piping. The liquid purification system 30 includes a first purification unit PU, a second purification unit PM, and a third purification unit PF. The pump 31 as a liquid supply device provided in the liquid purification system 30 sucks up and discharges the liquid Wb from the suction pipe 40, and then passes through the liquid supply pipe 41 </ b> I as the inlet-side liquid passage, and then the first purification unit PU and the second purification. The part PM flows in the order of the third purification part PF, and the radioactive material is removed in the process. The liquid (purified liquid) Wa discharged from the third purification unit PF is discharged through a liquid discharge pipe 41E serving as an outlet-side liquid passage.

  As shown in FIG. 7, in the first purification unit PU, six liquid purification apparatuses 1Aa, 1Aa, 1Ab, 1Ab, 1Ac, and 1Ac are connected in series in this order by a connection pipe 46 as a connection passage. . Specifically, six liquid purification apparatuses 1Aa, 1Aa, 1Ab, 1Ab, 1Ac, and 1Ac are connected in series by a connecting pipe 46 that connects the liquid outlet 6 and the liquid inlet 5. A liquid supply pipe 41I is connected to the liquid inlet 5 of the liquid purification apparatus 1Aa arranged on the most upstream side in the flow direction of the liquid Wb. A purification unit connection pipe 43 as a purification unit connection passage is connected to the liquid outlet 6 of the liquid purification apparatus 1Ac arranged on the most downstream side in the flow direction of the liquid Wb. By doing in this way, the liquid Wb discharged from the pump 31 and supplied to the first purification unit PU through the liquid supply pipe 41I becomes the six liquid purification devices 1Aa, 1Aa, 1Ab, 1Ab, 1Ac, 1Ac. In this order, and is discharged from the first purification unit PU through the purification unit connecting pipe 43.

  As shown in FIG. 8, in the second purification unit PM, three liquid purification apparatuses 1ma, 1mb, and 1mc are connected in series in this order by a connection pipe 46 as a connection passage. Specifically, three liquid purification apparatuses 1ma, 1mb, and 1mc are connected in series by a connecting pipe 46 that connects the liquid outlet 6 and the liquid inlet 5. Further, the purification unit connection pipe 43 from the first purification unit PU is connected to the liquid inlet 5 of the liquid purification device 1ma arranged on the most upstream side in the flow direction of the liquid Wb. A purification unit connection pipe 44 as a purification unit connection passage is connected to the liquid outlet 6 of the liquid purification apparatus 1mc arranged on the most downstream side in the flow direction of the liquid Wb. By doing in this way, the liquid Wb that has passed through the first purification unit PU and supplied to the second purification unit PM through the purification unit connection pipe 43 is transferred to the three liquid purification devices 1ma, 1mb, and 1mc. It flows in order and is discharged from the second purification part PM through the purification part connecting pipe 44.

  As shown in FIG. 9, in the third purification unit PF, three liquid purification devices 1fa, 1fb, 1fc are connected in series in this order by a connection pipe 46 as a connection passage. Specifically, three liquid purification apparatuses 1fa, 1fb, and 1fc are connected in series by a connecting pipe 46 that connects the liquid outlet 6 and the liquid inlet 5. Further, the purification unit connection pipe 44 from the second purification unit PM is connected to the liquid inlet 5 of the liquid purification device 1fa arranged on the most upstream side in the flow direction of the liquid Wb. A liquid discharge pipe 41E is connected to the liquid outlet 6 of the liquid purification apparatus 1fc arranged on the most downstream side in the flow direction of the liquid Wb. In this way, the liquid Wb that has passed through the third purification unit PF and supplied to the third purification unit PF through the purification unit connecting pipe 44 is supplied with the three liquid purification devices 1fa, 1fb, and 1fc. It flows in order. The liquid Wb that has passed through the third purification unit PF is discharged from the third purification unit PM through the liquid discharge pipe 41E as the liquid Wa purified by the liquid purification system 30.

  By configuring the first purification unit PU, the second purification unit PM, and the third purification unit PF in this manner, the liquid purification system 30 can remove a plurality of types of radioactive substances from the liquid Wb. In this embodiment, even if the adsorption capacity of the adsorbent disposed downstream in the flow direction of the liquid Wb is higher than the adsorption capacity of the adsorbent disposed in the upstream direction of the liquid Wb flow direction. Good. For example, the 1st purification | cleaning part PU provided with 1 A of liquid purification apparatuses which have the adsorbent (for example, zeolite particle) with the lowest adsorption | suction ability of a radioactive substance is arrange | positioned in the most upstream side in the flow direction of the liquid Wb. Next, the second purification unit PM including the liquid purification device 1ma having an adsorbent (for example, zeolite particles different from the liquid purification device 1A) having a low ability to adsorb radioactive substances is disposed on the outlet side of the first purification unit PU. To do. And the 3rd purification | cleaning part PF provided with liquid purification apparatus 1fa etc. which have an adsorbent with the highest adsorption capacity of a radioactive substance is arrange | positioned in the most downstream side in the flow direction of the liquid Wb. As the adsorbent that the liquid purification apparatus 1fa has, for example, a ferrocyanide adduct or a mixture of ferrocyanide adsorbent and zeolite particles is used.

  By doing in this way, the liquid purification system 30 can use an inexpensive adsorbent with low adsorbability for the liquid purification apparatus 1A on the upstream side in the flow direction that needs frequent replacement. And the replacement frequency of such adsorbents can be kept low by disposing an expensive adsorbent with high adsorbability (for example, ferrocyanide adsorbent) on the downstream side in the flow direction of the liquid Wb. As a result, the running cost of the liquid purification system 30 is reduced.

  In the present embodiment, in the liquid purification apparatuses 1 and 1A, the liquid inlet 5 is disposed on the opposite side (upper side) in the vertical direction, and the liquid outlet 6 is disposed on the vertical direction side (lower side). The liquid Wb flows from the upper side toward the lower side, but the arrangement of the liquid inlet 5 and the liquid outlet 6 is not limited to this. Further, in the liquid purification apparatuses 1 and 1A, the positions of the liquid inlet 5 and the liquid outlet 6 in the vertical direction may be approximately the same.

  Next, other components included in the liquid purification system 30 will be described. In the liquid purification system 30, valve devices 33 and 37 are provided in the liquid supply pipe 41I, and a valve device 38 is provided in the liquid discharge pipe 41E. The valve device 33 is disposed on the pump 31 side, and the valve device 37 is disposed on the first purification unit PU side. The valve device 37 on the first purification unit PU side is not always necessary.

  The liquid purification system 30 includes a gas cylinder 32 as a gas supply device, a gas supply pipe 42 as a gas supply passage, and a valve device 34 provided in the gas supply pipe 42. The gas cylinder 32 is filled with a high-pressure gas (such as nitrogen or air). The gas supply pipe 42 is connected between the valve devices 33 and 37 of the liquid supply pipe 41I. The operations of the pump 31 and the valve devices 33, 37, 38, 42 are controlled by the control device 35.

  The control device 35 is, for example, a microcomputer. When the liquid purification system 30 purifies the liquid Wb, the control device 35 opens the valve devices 33, 37, and 38 and drives the pump 31 to supply the liquid Wb to the first purification unit PU. When changing the supply amount of the liquid Wb, the control device 35 adjusts the valve opening degree of the valve device 33 or changes the discharge amount of the pump 31. When the liquid purification system 30 stops the purification of the liquid Wb, the control device 35 stops the pump 31. In this case, the control device 35 may close the valve devices 38, 33, and 37.

  When the filtration cartridge 2 included in the liquid purification devices 1 and 1A is replaced, the control device 35 closes the valve device 33 and opens the valve devices 37 and 38. And the control apparatus 35 opens the valve apparatus 34, and supplies the gas with which the gas cylinder 32 was filled to liquid purification apparatus 1A, 1 via the liquid supply pipe | tube 41I. Then, the liquid in the filtration cartridge 2 accommodated in the liquid purification apparatuses 1A and 1 is discharged from the liquid discharge pipe 41E by the high-pressure gas. When the liquid discharged from the liquid discharge pipe 41E falls below a predetermined amount, the control device 35 closes the valve device 34. In this state, since most of the liquid in the filtration cartridge 2 has been removed, the lid 4 is removed from the housing 3, the filtration cartridge 2 housed in the liquid purification device 1 is replaced, and a new filtration cartridge 2 is obtained. Is stored in the housing 3 from the insertion port 3H. The filtration cartridge 2 with reduced purification performance is removed from the housing 3 and then disposed of as it is (for example, storing and storing the filtration cartridge 2 together in a radioactive substance storage container). Contamination to equipment can be minimized.

  The liquid purification apparatus 1 shown in FIGS. 1 and 2 includes a plurality of filtration cartridges 2. In this case, it may not be necessary to replace all the filtration cartridges 2 at the same time. In such a case, the filtration cartridge 2 that has deteriorated purification performance but has not yet been replaced may be taken out of the housing 3 and placed in a different place from before the removal. By doing in this way, the filtration cartridge 2 can be used effectively.

  In the present embodiment, dosimeters 36 are attached to the plurality of liquid filtration devices 1, 1 </ b> A included in the liquid purification system 30. The control device 35 acquires the detection value (dose) of radiation detected by the dosimeter 36. The radiation detected by the dosimeter 36 is caused by the radioactive material adsorbed on the filtration cartridge 2 of the liquid filtration device 1 or 1A. Therefore, the radiation dose detected by the dosimeter 36 is highly correlated with the amount of radioactive material adsorbed on the zeolite particles 23 of the filtration cartridge 2. In the present embodiment, the replacement timing of the filtration cartridge 2 is determined based on the radiation dose detected by the dosimeter 36. For example, when the dose of radiation detected by the dosimeter 36, that is, the dose from the filtration cartridge 2 exceeds a predetermined value, a considerable amount of radioactive substance is adsorbed on the zeolite particles 23 of the filtration cartridge 2 and the purification performance is lowered. it seems to do. Therefore, when the dose of radiation detected by the dosimeter 36 exceeds a predetermined value, the control device 35 notifies that it is time to replace the filtration cartridge 2. For example, the control device 35 notifies the replacement time of the filtration cartridge 2 by turning on or blinking the replacement notification lamp 39. By doing in this way, since an operator can omit the trouble of measuring the dose of the filtration cartridge 2, work efficiency can be improved. The operator may measure the dose of the filtration cartridge 2 and determine the replacement timing of the filtration cartridge 2 based on the result. Thus, in this embodiment, the replacement time of the filtration cartridge 2 is determined based on the dose from the filtration cartridge 2.

  FIG. 10 is a side view showing a liquid purification vehicle equipped with the liquid purification system according to the present embodiment. FIG. 11 is a plan view showing a liquid purification vehicle equipped with the liquid purification system according to the present embodiment. The liquid purification vehicle 100 includes a cargo bed 101, a cab 102, a front wheel 104F, and a rear wheel 104R, and is a self-propelled vehicle equipped with a power generation device such as an internal combustion engine. The liquid purification vehicle 100 does not include a power generation device and may not be able to run on its own.

  In the liquid purification vehicle 100, a plurality (four in this embodiment) of liquid purification systems 30 (see FIG. 6) are mounted on the loading platform 101. The number of liquid purification systems 30 mounted on the liquid purification vehicle 100 is not limited to this example. The liquid purification system 30 is as described above. The liquid purification vehicle 100 includes a radiation shield 103 between the liquid purification system 30 and the cab 102. Although the shield 103 depends on the type of radiation from the liquid purification system 30, for example, lead, a neutron absorption resin, or a combination of both can be used. The liquid purification vehicle 100 shields radiation from the liquid purification system 30 toward the cab 102 by the shield 103.

  As shown in FIG. 11, the pump 31 supplies the four liquid purification systems 30 with the liquid Wb to be purified sucked up from the suction pipe 40. After being connected to the pump 31, the liquid supply pipe 41 </ b> I branches at four locations and supplies the liquid Wb to be purified to each liquid purification system 30. A valve device 37 controlled by the control device 35 is provided in the branched liquid supply pipe 41I. The control device 35 can select the liquid purification system 30 to which the liquid Wb is supplied by controlling opening and closing of the valve device 37. The liquid discharge pipes 41E from the respective liquid purification systems 30 merge into one. The valve device 38 controlled by the control device 35 is provided in each liquid discharge pipe 41E before joining. The control device 35 can select the liquid purification system 30 from which the purified liquid Wa is discharged by controlling the opening and closing of the valve device 37.

  The liquid purification vehicle 100 changes the number of liquid purification systems 30 mounted on the loading platform 101, the combination of the liquid purification devices 1 and 1A included in the liquid purification system 30, and the number of filtration cartridges 2 included in the liquid purification device 1. Thus, it is possible to obtain an appropriate purification performance corresponding to the amount (scale) of the liquid Wb to be purified. Further, the liquid purification vehicle 100 can cope with various radioactive substances removal and various uses by changing the type of the zeolite particles 23 filled in the filtration cartridge 2.

  Since the liquid purification system 30 can be relatively small, the liquid purification vehicle 100 can be a relatively small vehicle (for example, a 4-ton truck, a 2-ton truck, or a light truck, depending on the number of liquid purification systems 30). Etc.) can be used. For this reason, it is possible to relatively easily enter a place with an obstacle or the like to purify the liquid to be purified. In addition, the liquid purification system 30 can be operated if there is a space in which a vehicle as large as a truck can enter. Therefore, the liquid purification system 30 and the liquid purification vehicle 100 equipped with the liquid purification system 30 have the advantage of being excellent in versatility. There is.

1, 1ma, 1mb, 1mc, 1fa, 1fb, 1fc, 1A, 1Aa, 1Ab, 1Ac Liquid purification device 2 Filtration cartridge 2H Opening portion 2T End portion 3TA One end portion 3TB The other end portion 3Ha Input port 3, 3A Enclosure Body 4, 4A Lid 4P Lid side O-ring 5 Liquid inlet 6 Liquid outlet 7 Bolt 7H Opening 8 Inlet side strainer 10 Strainer O ring 11 Cartridge O ring 12 Outlet side strainer 14 Handle 15 Bracket 16 Pin 17 Arm 21 Container 22 Filter 22M Filter unit 23 Zeolite particle 30 Liquid purification system 31 Pump 32 Gas cylinder 33, 34, 37, 38 Valve device 35 Control device 36 Dosimeter 39 Exchange notification lamp 40 Suction tube 41I Liquid supply tube 41E Liquid discharge tube 42 Gas supply tube 43 , 44 Purification unit connection pipe 46 Connection pipe 100 Liquid purification Vehicle 101 loading platform 102 cab 103 shielding body PU first purification unit PM second purification unit PF third purification unit

Claims (13)

A filtration cartridge in which a cylindrical container having openings at both ends is filled with an adsorbent, the liquid flows in from the opening at one end, and the liquid flows out from the opening at the other end; ,
A cylindrical structure for storing the filtration cartridge, wherein one end portion stores the filtration cartridge inside, a liquid inlet for supplying the liquid to the filtration cartridge, and the filter cartridge that has passed through the filtration cartridge A housing having a liquid outlet for discharging liquid to the outside of the structure;
A lid for closing the inlet,
The liquid purification apparatus, wherein the filtration cartridge is replaceable.   The liquid purification apparatus according to claim 1, wherein the filtration cartridge includes filters at both ends.   The liquid purification apparatus according to claim 1, wherein the container is an iron-based material.   The liquid purification apparatus according to claim 1, wherein the container is a resin-based material.   4. The liquid purification apparatus according to claim 1, further comprising an elastic body that is interposed between the lid and the filtration cartridge and applies a pressing force to both. 5.   The liquid purification apparatus according to any one of claims 1 to 5, wherein the adsorbent is at least one of zeolite particles and a ferrocyanide adsorbent.   A plurality of the liquid purification apparatuses according to any one of claims 1 to 6, wherein the plurality of liquid purification apparatuses are connected so that the liquid sequentially flows, and at least two of the liquid purification apparatuses are different from each other. A liquid purification system comprising an adsorbent.   The liquid purification system according to claim 7, wherein at least two of the plurality of liquid purification devices have adsorbents having different radioactive substance adsorption capacities.   The liquid purification system according to claim 8, wherein the adsorption capacity of the adsorbent disposed downstream of the liquid flow direction is higher than the adsorption capacity of the adsorbent disposed upstream of the liquid flow direction. . A liquid supply device for supplying the liquid to the liquid purification device;
A gas supply device for supplying gas to the filtration cartridge of the liquid purification device to remove the liquid in the filtration cartridge;
The liquid purification system according to any one of claims 7 to 9, comprising:   11. The liquid purification system according to claim 7, further comprising a notification device that notifies that it is time to replace the filtration cartridge when the dose from the filtration cartridge exceeds a predetermined value.   A vehicle for liquid purification comprising the liquid purification system according to any one of claims 7 to 11.   The vehicle for liquid purification according to claim 12, further comprising a radiation shielding member between a driver's cab and the liquid purification system.

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