JP2009150606A - Device for removing salt content in air - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To further efficiently reduce salt content included in the air in ventilating the inside of facilities only by a natural air cooling method without using a power unit. <P>SOLUTION: This device for removing salt contents in the air comprises: an air passage 7 for taking the air outside of a storage room 2 into the storage room 2 receiving a stored object in ventilating the storage room (building 2) by natural ventilation; a water storage portion 9 disposed on the way of the air passage 7 to store the water 39 kept into contact with the air flowing in the air passage 7; and a plurality of projections 11 alternately disposed on a ceiling face and a bottom face of the water storage portion 9 along the air flowing direction, and having inclined faces 10 to allow the airflow to meander up and down. The tops 34 of bottom-side projections 11 and lower ends 35 of the ceiling-side projections 11 are positioned upper than a water level of the water 39. <P>COPYRIGHT: (C)2009,JPO&INPIT

Description

  The present invention relates to an apparatus for removing salt in air that removes salt contained in air. More specifically, the present invention relates to an apparatus suitable for use in removing salt contained in air taken into a storage chamber when, for example, a storage chamber in which spent nuclear fuel is stored is ventilated with natural ventilation.

  In general, facilities that store spent nuclear fuel in a nuclear reactor and remove heat from spent nuclear fuel use a natural air-cooling system that uses buoyancy due to heat released from containers that contain spent nuclear fuel. Is adopted. However, in the case of the natural air cooling system that ventilates the facility with natural ventilation, if salt is contained in the air, the salt adheres to the surface of a metal container called a canister that seals the spent nuclear fuel, and the SCC There is a risk of causing stress corrosion cracking. In order to prevent the occurrence of SCC, it is necessary that the salinity concentration adhering to the canister surface does not exceed the limit surface adhering salt concentration with respect to the occurrence of SCC.

As a technique for preventing the inflow of salt into the facility, there is a technique for removing fine dust using an air filter (Patent Document 1), and salt particles contained in the outside air are removed by a filter and air is supplied by a blower. A technique to perform (Patent Document 2) and a technique (Patent Document 3) to remove salt by deliquescence phenomenon by contacting water when taking in outside air to ventilate the inside of the facility by natural ventilation are known.
JP-A-6-182127 JP-A-7-310938 JP 2007-155314 A

  However, in the techniques of Patent Documents 1 and 2, since the outside air is taken in through the filter, the pressure loss is large, and there is a problem that a power device such as a blower is required to send cold air into the facility. Moreover, although the technique of patent document 2 employ | adopts the forced air cooling system which supplies air using a fan, compared with a natural air cooling system, the facility cost becomes large and the safety | security when a fan stops cannot be guaranteed. Problems arise. In addition, when a filter or a blower is used, the maintenance is troublesome, and the cost for the maintenance increases.

  On the other hand, the technique of Patent Document 3 is excellent in that the inside of the facility can be ventilated without using power equipment, but it is more practical if salt removal can be performed more efficiently while suppressing an increase in pressure loss. It will be something.

  Therefore, the present invention can smoothly ventilate the inside of a facility only by natural air cooling without using power equipment, and can reduce the salt contained in the air more efficiently. An object is to provide an apparatus for removing salt. Another object of the present invention is to provide an apparatus for removing salt in the air that can reduce running costs and can be easily maintained.

  In order to achieve this object, the apparatus for removing salinity in the air according to claim 1 is characterized in that air outside the storage chamber is placed inside the storage chamber when ventilating the storage chamber storing the object to be stored with natural ventilation. An air passage to be taken in, provided in the middle of the air passage, and a water reservoir for storing water in contact with the air flowing in the air passage, and alternately provided along the direction of air flow on the ceiling surface and bottom surface of the water reservoir, A plurality of protrusions having slopes that meander the air flow up and down are provided, and the apex of the bottom protrusion and the lower end of the ceiling protrusion are located above the water surface.

  Therefore, when the air that has flowed into the air passage comes into contact with the water surface of the water stored in the water reservoir in the middle of the air passage, salt in the air dissolves in the water due to the deliquescence phenomenon. As a result, the accommodation chamber is ventilated by air with reduced salinity. Since the protrusions are alternately provided on the ceiling surface and the bottom surface of the water reservoir, the air flow passing through the water reservoir is forced to meander up and down and repeatedly collides with the water surface many times. Since the lower end of the ceiling-side protrusion is located above the water surface, that is, it is not submerged in water, a space for air flow is secured, and the air passage is blocked by the water in the water reservoir and the ceiling-side protrusion. Absent.

  The apparatus for removing salt in air according to claim 2 is such that the apex of the bottom projection is located above the lower end of the ceiling projection. Therefore, the air passing through the water reservoir is lowered to a position lower than the apex of the bottom projection by the ceiling projection, and then lifted by the bottom projection, so that the air flow meanders more reliably. .

  The apparatus for removing salt in the air according to claim 3 is such that the slope of the bottom projection is wet. Therefore, even when air rises along the slope of the bottom protrusion, salt in the air dissolves in water due to the deliquescence phenomenon. The means for wetting the slope is not particularly limited. For example, the slope is covered with a water-absorbing member such as cloth, non-woven fabric, felt, etc. It is conceivable to leave it in a closed state.

  According to the apparatus for removing salt in air according to claim 1, since the protrusions are alternately provided above and below the water reservoir, the air flow can be forced to meander up and down and repeatedly collide with the water surface. it can. For this reason, the chance that air contacts the water surface reliably can be increased, and the salt concentration of the air ventilating the accommodation chamber can be efficiently reduced. Moreover, since only the air flow is meandered, the pressure loss does not increase so much while the salinity concentration can be reduced. Further, there is no pressure loss due to clogging as in the case of using a filter. In this way, salt can be efficiently removed from the outside air flowing into the accommodation room without using a filter, and there is no need to replace the filter due to clogging, thereby preventing rust in equipment in the accommodation room at low cost. Can do.

  Moreover, in the case of the apparatus for removing salinity in the air according to claim 2, the flow of air passing through the water reservoir can be more meandered, and the salinity concentration of the air can be more efficiently reduced. .

  Moreover, in the case of the apparatus for removing salt in the air according to claim 3, the opportunity for air to come into contact with water increases, and more salt can be dissolved in water.

  Hereinafter, the configuration of the present invention will be described in detail based on the best mode shown in the drawings.

  1 to 3 show a first embodiment of an apparatus for removing salt in air according to the present invention. A device for removing salt in the air (hereinafter referred to as a salt removing device) 1 of this embodiment is a storage chamber (generally called a building) for storing spent nuclear fuel (not shown) stored in a double container of a canister and a cask 3. Hereinafter, it is called a building.) When ventilating 2 with natural ventilation, it is installed near the outside air intake 4 to remove salt in the air. The salt removal device 1 includes an air passage 7 that takes air outside the building 2 into the building 2 and a water reservoir that is provided in the middle of the air passage 7 and accumulates water 39 that contacts the air flowing through the air passage 7. And a plurality of protrusions 11 having slopes 10 provided alternately on the ceiling surface and bottom surface of the portion 9 and the water reservoir portion 9 along the direction of air flow and meandering the air flow up and down. In the present embodiment, the water 39 is stored by forming a tray-like depression (hereinafter referred to as a tray) on the bottom surface of the water reservoir 9. Hereinafter, the outside of the building 2 is referred to as “outdoor”, and the inside of the building 2 is referred to as “indoor”.

  The building 2 is provided with an outside air intake 4 and an air outlet 5 for taking outdoor air indoors, and the air heated by the heat released from the cask 3 generates an upward air flow to discharge the indoor air outdoors. Is configured to do. The salt removal device 1 is provided at a low position inside the building 2, for example, on the floor near the wall, and is attached to the outside air intake 4. When warm air is discharged from the exhaust port 5 provided at a high position, outdoor air flows into the room through the salt removal device 1 from the outside air intake port 4 so as to be replaced with this air. In this way, the building 2 is configured to be ventilated with natural ventilation by the outside air intake 4 and the exhaust port 5.

  The air passage 7 of the salt removal device 1 is provided in the duct 6, for example. The inside of the duct 6 is partitioned into a plurality of stages of air passages 7 by a plurality of upper and lower partition walls 33, and has a plurality of inlets 6a and a plurality of outlets 6b. In the present embodiment, the inside of the duct 6 is partitioned into five stages of air passages 7. However, the number of stages of the air passage 7 is not limited to five, but may be two to four or six or more. The outlets 6b of the respective stages are arranged stepwise along the axial direction of the duct 6 so that the water 39 accumulated in the tray formed in the water reservoir 9 sequentially overflows from the upper stage to the lower stage. Is provided.

  The water reservoir 9 of the air passage 7 collects salt contained in the air, and is provided downstream of the guide 8 that guides the air that flows in from the outside via the outside air intake 4. . The front end of the tray of the water reservoir 9 protrudes from the outlet 6b toward the interior back side along the axial direction of the duct 6. The trays at each stage are formed so as to be stacked stepwise so that the water 39 can be easily received when the water 39 flows down from above.

  A plurality of protrusions 11 are provided on the ceiling surface and bottom surface of the water reservoir 9. The ceiling-side protrusions 11 and the bottom-side protrusions 11 are alternately provided along the air flow direction. Each protrusion 11 is, for example, a protrusion having a triangular cross-sectional shape. For example, as shown in FIG. 3, the protrusion 11 crosses the duct 6 in the width direction and is provided between both side walls of the duct 6. In addition, the bottom protrusion 11 is divided into a plurality in the width direction of the water reservoir 9 so that the water 39 flows between the adjacent bottom protrusions 11 so that the water 39 is evenly distributed on each tray. It has become. The protrusion 11 is provided with a slope 10 that causes the air flow to meander up and down. Further, the apex 34 of the bottom protrusion 11 is located above the water surface. Similarly, the lower end 35 of the ceiling-side protrusion 11 is also located above the water surface, and a space through which air flows is secured. In the present embodiment, the apex 34 of the bottom projection 11 is located above the lower end 35 of the ceiling projection 11 so that the air flow can meander more reliably. However, the vertex 34 of the bottom projection 11 does not have to be positioned above the lower end 35 of the ceiling projection 11. For example, as shown in FIG. 11, and the apex 34 of the bottom protrusion 11 may be positioned below the lower end 35 of the ceiling protrusion 11 as shown in FIG. Even in these cases, the air flow can meander up and down by the inclined surface 10 of each projection 11.

  Note that the number of protrusions 11 may be changed for each step, or may be the same for all steps. Further, the shape and size of the cross section of the protrusions 11 may be the same or different for all the protrusions 11, or only some of the protrusions 11 may be different. Further, the shape and size of the cross section of the protrusion 11 may be different for each step. In addition, the shape and size of the cross section of the bottom protrusion 11 may be the same as or different from the shape and size of the cross section of the ceiling protrusion 11. Furthermore, the protrusion 11 may be formed over the entire area of the water reservoir 9, or the protrusion 11 may be formed leaving a partial area.

  The guide 8 guides the air flowing in from the outside through the outside air intake 4 and the inlet 6a to the water reservoir 9. The guide portion 8 is attached to the edge of the outside air intake 4 so that each inlet 6a of the duct 6 and the outside air intake 4 communicate with each other. When outdoor air flows into the guide portion 8 via the outside air intake 4 and the inlet 6a, the air is guided onto the tray. Further, the guide portion 8 is formed in a bent shape so that the air flowing in from the outside through the outside air intake 4 and the inlet 6 a is lowered toward the water 39. That is, the guide portion 8 is formed with a downward inclined portion 12 that guides air that has flowed in from the outside through the outside air inlet 4 and the inlet 6a to the airflow as a descending airflow onto the tray. Therefore, when the water 39 is accumulated in the tray, the air flowing into the guide portion 8 from the outside through the outside air intake 4 and the inlet 6a collides with the water 39 on the tray.

  The roof 13 of the building 2 has a hole 13a for taking rainwater indoors. The hole 13 a communicates with the inside of the building 2 through the rainwater passage 14. Rainwater traveling through the roof 13 flows into the holes 13 a and is guided to the upper surface of the duct 6 through the rainwater passage 14. A long groove (not shown) is formed on the upper surface of the duct 6 along the axial direction of the duct 6. This long groove is formed toward the tray of the uppermost water reservoir 9 of the duct 6. Therefore, rainwater flowing down from the drain outlet 14 a of the rainwater passage 14 flows into the long groove, and is guided to the tray of the uppermost water reservoir 9 of the duct 6 by the long groove. The rainwater 39 that overflows in the uppermost tray flows into the next lower tray. The rainwater 39 overflowed in each tray sequentially flows into the lower tray. The rainwater 39 overflowed from the lowermost tray flows into the drain pipe 15 installed below the duct 6 and is discharged to the outside from the drain port 16.

  A water level gauge 17 is installed on the uppermost tray of the duct 6. When the water level of the water 39 stored in the tray without raining falls below a predetermined water level due to evaporation or the like, this is detected by the water level meter 17, and a solenoid (not shown) is received in response to the detection result. ) Is turned on. When the solenoid is turned on, the tap valve 18 is opened, and tap water 39 is supplied to the uppermost tray. Therefore, the tray is always filled with water 39 regardless of the presence or absence of rainwater.

  In the salt removal device 1 configured as described above, when outdoor air flows into the guide portion 8, the air is guided toward the water surface of the water reservoir 9. The air that has flowed into the guide unit 8 from the outside descends toward the water surface of the water reservoir 9 at the downward slope 12 and collides with the water surface. When the air contacts the water 39 in this way, if the salt is contained in the air, the salt is dissolved in the water 39 by the deliquescence phenomenon. Further, when air flows into the water reservoir 9 from the guide portion 8, the air flow meanders up and down by the protrusion 11. That is, since the ceiling-side protrusions 11 and the bottom-side protrusions 11 are alternately formed, the air flow can be surely meandered. As a result, the chance of air to come into contact with the water surface is increased, and more salt can be dissolved in the water 39. In addition, since a plurality of stages of air passages 7 are formed in the duct 6, the contact area between the air 39 that flows into the duct 6 from the outside and the water 39 can be increased. The salt contained in the flowing air can be efficiently captured. Furthermore, when the air that has passed through the water reservoir 9 exits from the outlet 6b, it contacts the water 39 that flows down from the upper tray so as to cover the outlet 6b. Can be dissolved. Thus, by using the salt removal device 1 to ventilate the interior with natural ventilation, the salinity contained in the air can be greatly reduced without obstructing the flow of air flowing into the indoor from the outside. it can. Therefore, the room can be sufficiently ventilated with natural ventilation, and the salt removal device 1 can be made sufficiently practical. Moreover, the generation | occurrence | production of the rust of the metallic apparatus put indoors can be suppressed. Further, since the structure is simple, the running cost can be greatly reduced. Further, since the structure is simple, maintenance work is facilitated.

  In the salt removal device 1 of the present invention, since the protrusions 11 are alternately provided above and below the water reservoir 9, the air flow can be forced to meander up and down and repeatedly collide with the water surface. For this reason, the chance that air contacts the water surface reliably can be increased, and the salt concentration of the air ventilating the accommodation chamber can be efficiently reduced. Moreover, since only the air flow is meandered, the pressure loss does not increase so much while the salinity concentration can be reduced. Further, there is no pressure loss due to clogging as in the case of using a filter. In this way, salt can be efficiently removed from the outside air flowing into the accommodation room without using a filter, and there is no need to replace the filter due to clogging, thereby preventing rust in equipment in the accommodation room at low cost. Can do.

  The salt removal device 1 of the present invention is not only provided in the building 2 that accommodates the cask 3, but may also be directly mounted on the cask 3 when the cask 3 is stored in the open air. This second embodiment is shown in FIG. In addition, about the same structural member as 1st embodiment, the same code | symbol is attached | subjected and the description is abbreviate | omitted.

  As shown in FIG. 5, the cask 3 contains a canister 20 that is a metal container for sealing the spent nuclear fuel 19, and heats the canister 20 by natural air cooling. The cask 3 includes a bottomed cylindrical main body 21 of the cask 3 and a lid 23 that closes the opening 22 a of the hollow portion 22 formed inside the main body 21. The cask 3 is warmed by the heat generated by the outside air intake 24 for taking the air outside the cask 3 inside the cask 3 and the canister 20 housed inside the main body 21, and discharges the raised air to the outside of the cask 3. And an exhaust port 25. The outside air intake port 24 communicates with the hollow portion 22 through a passage 26 bent in a stepped manner. A plurality of pedestals 28 are fixed to the bottom 27 a of the inner wall surface 27 that forms the hollow portion 22. The canister 20 is inserted into the hollow portion 22 from the opening 22a, and is placed on the pedestal 28 so that a gap is formed between the inner wall surface 27 of the main body portion 21 and the outer wall surface 29 of the canister 20. When the opening 22 a is closed by the lid 23, a gap is formed between the inner side surface 23 a of the lid 23 and the outer wall surface 29 of the canister 20, and between the inner side surface 23 a of the lid 23 and the upper surface 21 a of the main body 21. A plurality of passages 30 are formed. The passage 30 is bent in a staircase shape and communicates the exhaust port 25 and the hollow portion 22. The salt removing device 1 is arranged so that the outside air inlet 24 and the outlet 6 b face each other, and the outlet 6 b is close to the outside air inlet 24. The salt removal device 1 is fixed to, for example, the outer wall surface of the cask 3 or the ground via a support member 31. In the embodiment shown in FIG. 5, it is assumed that tap water is supplied to the tray.

  The air in the cask 3 is warmed by the heat released from the canister 20, becomes an ascending current, and is discharged from the exhaust port 25 at the top of the canister 20. When warm air is discharged from the exhaust port 25, air outside the cask 3 flows into the cask 3 through the salt removal device 1 and the external air intake port 24 so as to be replaced with this air.

  When the air outside the cask 3 flows into the guide portion 8 of the air passage 7 at each stage, the air is guided toward the water surface of the water reservoir 9. The air that has flowed into the guide portion 8 from the outside of the cask 3 descends toward the water surface on the tray at the downward inclined portion 12, and eventually collides with the water surface. When the air contacts the water 39 in this way, if the salt is contained in the air, the salt is dissolved in the water 39 by the deliquescence phenomenon. Further, when air flows into the water reservoir 9 from the guide portion 8, the air flow meanders up and down by the upper and lower protrusions 11. As a result, the chance of air to come into contact with the water surface is increased, and more salt can be dissolved in the water 39. Furthermore, since the air that has passed through the water reservoir 9 comes into contact with the water 39 that flows down from the upper tray when it exits from the outlet 6b, the salt content in the air can be dissolved using the deliquescence phenomenon.

  In this way, by using the salt removal device 1 for ventilating the inside of the cask 3 with natural ventilation, the salinity contained in the air is greatly reduced without blocking the flow of air flowing from the outside to the inside of the cask 3. Can be reduced. Therefore, the inside of the cask 3 can be sufficiently ventilated by natural ventilation, and the salt removal device 1 can be made sufficiently practical. In addition, SCC caused by the adhesion of salt to the canister 20 can be suppressed. Further, since no power is required and the structure is simple, the equipment cost and running cost can be greatly reduced. Further, since the structure is simple, maintenance work is facilitated.

  The above-described embodiment is an example of a preferred embodiment of the present invention, but is not limited thereto, and various modifications can be made without departing from the scope of the present invention. For example, in the above-described embodiment, the example of the building 2 that stores the cask 3 is described as an example of the facility that stores spent nuclear fuel. However, other facilities that employ a cooling method using natural ventilation, such as a vault storage facility. Needless to say, it can also be applied. Furthermore, the salt removal apparatus of the present invention is not limited to the nuclear facility related to the above-described embodiment, and is a facility that is located in a coastal area and ventilates by taking in outside air. It can be widely applied when the salt content in the open air is harmful to the air and needs to be removed.

  In the above-described embodiment, the duct 6 is partitioned by the partition wall 33 to form the plurality of air passages 7. However, the salt removal device 1 is configured by the single air passage 7 without partitioning the duct 6. Also good.

  In the above-described embodiment, the water 39 overflowed from the lowermost tray is drained to the outside by the drainage pipe 15. However, the overflowed water 39 is circulated by a pump or the like and supplied to the tray again. Also good.

  Moreover, although the salt removal apparatus 1 was installed indoors in 1st embodiment mentioned above, you may attach the salt removal apparatus 1 to the outer wall of the building 2 as shown in FIG. In the case of the third embodiment, since the duct 6 is exposed to the outdoors, rainwater from the rain gutter can be directly supplied to the tray without providing the rainwater passage 14.

  Furthermore, as shown in FIG. 7, the salt removal device 1 may be provided outside the building 2. In the salt removal device 1 of the fourth embodiment, the guide portion 8 and the downward inclined portion 12 are not provided in the duct 6, and the air taken into the duct 6 is directly guided to the water reservoir 9. . Also in the case of the fourth embodiment, the outdoor air flowing into the salt removal device 1 from each inlet 6a of the duct 6 comes into contact with the water 39 on the tray, and the salinity in the air changes to the water 39 due to the deliquescence phenomenon. Dissolve. Furthermore, when outdoor air flows in from each inlet 6a, it contacts the water 39 flowing down from the upper tray so as to cover each inlet 6a, so here too, deliquescence is used to dissolve salt in the air. Can be made.

  In the above description, the duct 6 is partitioned by the partition wall 33 to form the multistage air passage 7. However, the means for forming the multistage air passage 7 in the duct 6 is limited to this configuration. It is not a thing. For example, a plurality of air passages 7 may be formed by attaching and partitioning a tray as an independent part in the duct 6.

  In addition, even when it is set as the structure which does not provide the downward inclination part 12 like 4th embodiment, the flow of the air which flowed in from each inlet 6a of the duct 6 meanders up and down by the upper and lower protrusions 11, and is made to collide with the water surface. , Salt can be dissolved in water 39.

  In the first embodiment described above, an example in which the salt removal device 1 is used for the building 2 will be described. In the second embodiment, an example in which the salt removal device 1 is used for the cask 3 will be given. However, you may make it provide the salt removal apparatus 1 with respect to the building 2 which accommodates the cask 3 provided with the salt removal apparatus 1. FIG. As a result, the salt that could not be captured by the salt removal device 1 provided for the building 2 can be captured by the salt removal device 1 provided for the cask 3, so that the amount of salt attached to the canister can be further reduced. Can be reduced.

  Moreover, you may make it wet the slope 10 of the bottom side protrusion 11 always. An example of this case is shown in FIG. The slope 10 is covered with a water-absorbing surface member 36 such as cloth, gauze, non-woven fabric, or felt. The lower end of the surface member 36 is immersed in water 39, and the whole surface is always wet by sucking up the water 39. By covering the slope 10 with the wet surface member 36 in this way, the slope 10 can be in a constantly wet state. However, the means for wetting the slope 10 is not limited to this. For example, a hole may be made in the bottom surface of the upper water reservoir 9 and water 39 may be dripped onto the inclined surface 10 of the bottom protrusion 11 of the lower water reservoir 9 so that the inclined surface 10 is always wetted. But it ’s okay. By constantly wetting the inclined surface 10 of the bottom protrusion 11, the contact area between the air and the water 39 is increased, so that more salt can be dissolved in the water 39 and more salt in the air can be removed.

  In the above description, the water 39 of the upper tray flows down to the lower tray at the inlet 6a or the outlet 6b. That is, the water 39 flows down from the end of the tray. It is not limited to the end of the tray, and may flow down from a position in the middle of the tray.

  Further, in the above description, when the air that has passed through the water reservoir 9 exits from the outlet 6b or when indoor air flows in from the inlet 6a, the water 39 that flows down from the upper tray is contacted. It is not necessary to have such a configuration.

  In addition, a water holding member 37 that sucks and holds the water 39 of the water reservoir 9 and contacts the air flowing in the air passage 7 may be provided in the water reservoir 9. The water holding members 37 may be provided on all the steps, or may be provided on some of the steps. An example of this case is shown in FIGS. In FIG. 10, the description of the water 39 is omitted. The water holding member 37 in this example has a wall shape along the air flow, and is provided in the width direction of the duct 6, for example, six sheets at each stage. That is, each stage of the water reservoir 9 is divided into seven rows of passages by the six water holding members 37. The six water holding members 37 are arranged at regular intervals, for example. However, the water holding members 37 are not necessarily arranged at equal intervals. Further, the number of the water holding members 37 is not limited to six, and may be five or less or seven or more, and is appropriately determined according to the passage area and the like.

  The water holding member 37 is provided on the bottom surface of the water reservoir 9, and a gap is provided between the upper end and the ceiling surface. However, it is not necessary to provide a gap between the upper end of the water holding member 37 and the ceiling surface. The submerged portion of the water holding member 37 is provided with a flow path 38 such as a small hole, a slit, or a notch, for example, which allows the water 39 on both sides of the water holding member 37 to flow to make the water level uniform. To. However, the water holding member 37 may be provided, for example, on the ceiling surface. In this case, the water 39 can be allowed to flow by providing a gap between the lower end of the water holding member 37 and the bottom surface of the water reservoir 9. Therefore, the formation of the flow path 38 can be omitted.

  The water holding member 37 is provided over almost the entire length of the tray formed in the water reservoir 9. However, it is not always necessary to provide the water holding member 37 over almost the entire length of the tray, and the water holding member 37 may be partially provided. Moreover, the water holding member 37 may be divided into a plurality along the air flow direction, and the water holding members 37 may be provided at intervals.

  For example, as shown in FIG. 11, the water holding member 37 is covered with a water-absorbing surface member 40 such as cloth, gauze, non-woven fabric, or felt. The lower end of the surface member 40 is immersed in water 39, and the entire surface is always wet by sucking up the water 39. By covering the surface of the water holding member 37 with the wet surface member 40 in this way, the surface of the water holding member 37 can be in a constantly wet state. However, the means for holding the surface of the water holding member 37 in a wet state is not limited to this. For example, a hole is made in the bottom surface of the upper water reservoir 9 and water 39 is dripped onto the water holding member 37 of the lower water reservoir 9 so that the surface thereof is always wet, or other means may be used. .

  The air flowing into the air passage 7 makes contact with the water 39 on the tray and the water 39 held on the surface of the water holding member 37, and the water reservoir 9 is made to repeat meandering up and down by the upper and lower protrusions 11. pass. Thus, the air passing through the water reservoir 9 comes into contact with the water 39 held on the surface of the water holding member 37 in addition to the water 39 on the tray, so that the contact area between the air and the water 39 is increased. Also, the chance of positive contact with the water 39 on the tray is increased by meandering flow. For these reasons, a greater amount of salt can be dissolved in the water 39. Since the water holding member 37 has a wall shape that follows the flow of air, the water holding member 37 does not have a large air resistance, and even if the water holding member 37 is provided, salt content is not increased without significantly increasing the pressure loss. It can be removed more efficiently.

  In the above description, the water holding member 37 is shaped like a wall along the air flow, but may be shaped like a rod. An example of this case is shown in FIG. The water holding member 37 is provided on the bottom surface of the water reservoir 9 and extends straight toward the ceiling surface. However, the water holding member 37 may be provided on the ceiling surface. Further, the water holding member 37 may be inclined toward the upstream side or the downstream side in the air flow direction. The water holding members 37 are provided in a plurality of rows for each air passage 7. Each row includes a plurality of water holding members 37. Even when the water holding member 37 has a rod shape, the contact area between the air and the water 39 can be increased, and salt in the air can be more efficiently removed.

It is a longitudinal cross-sectional view which shows the aspect (1st embodiment) when the apparatus and cask which remove the salt content in the air of this invention are installed in the building. It is side view longitudinal cross-sectional view which shows schematic structure of the apparatus which removes the salt content in the air of 1st embodiment. It is sectional drawing of the water reservoir part of the apparatus which removes the salt content in the air. The protrusion provided in the water reservoir part of the apparatus which removes the salt in the same air is shown, (A) is a conceptual diagram when the height of the apex of the bottom protrusion and the lower end of the ceiling protrusion is the same, (B) FIG. 5 is a conceptual diagram when the vertex of the bottom protrusion is set lower than the lower end of the ceiling protrusion. It is a longitudinal cross-sectional view of the apparatus and the cask which remove the salt content in the air which shows 2nd embodiment. It is a side view longitudinal cross-sectional view which shows the aspect (3rd embodiment) when the apparatus which removes the salt content in air is attached to the outer wall of a building. It is a side view longitudinal cross-sectional view which shows the mode (4th embodiment) when the apparatus which removes the salt in air is installed in the outer side of a building. It is sectional drawing which shows a mode that the slope of the bottom side protrusion was covered with the water absorbing member. It is a side view longitudinal cross-sectional view which shows a mode (5th embodiment) when a water holding member is provided in the water reservoir. It is sectional drawing which shows the water reservoir part of the apparatus which removes the salt in the air of 5th embodiment. It is sectional drawing of a water holding member. It is a side view longitudinal cross-sectional view which shows a mode (6th embodiment) when a water holding member is provided in the water reservoir.

Explanation of symbols

1 Device for removing salt in air 2 Building (containment room)
7 Air passage 9 Water reservoir 10 Slope 11 Protrusion 34 Top 35 of bottom projection 33 Lower end 39 of ceiling projection 11 Water in contact with air

Claims (3)

  An air passage for taking in air outside the storage chamber into the storage chamber when ventilating the storage chamber for storing an object with natural ventilation, and air flowing in the air passage provided in the air passage A plurality of protrusions having slopes that meander the flow of air up and down, alternately provided along the direction of air flow on the ceiling surface and bottom surface of the water reservoir, An apparatus for removing salt from the air, wherein the top of the bottom projection and the bottom of the ceiling projection are positioned above the water surface of the water.   The apparatus for removing salt from the air according to claim 1, wherein the apex of the bottom protrusion is located above the lower end of the ceiling protrusion.   2. The apparatus for removing salt from air according to claim 1, wherein the slope of the bottom protrusion is wet.

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