JP2013180257A - Air cleaning apparatus and ventilation system - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide an apparatus in which a nitrogen oxide can be removed sufficiently and a load on a ventilation facility can be reduced by reducing the pressure loss.SOLUTION: An air cleaning apparatus includes a humidifier 210, a denitrating device 220, and a shield 230. The humidifier 210 includes a plurality of spray nozzles 211 each of which is exposed to air in the atmosphere flowing inside of an air duct 200 and directly sprays water into the air. The denitrating device 220 includes: a plurality of intake ports 221 for taking in air; a plurality of charging containers each opening the top and having a plurality of holes in the bottom thereof; a plurality of guide parts 223 each guiding the air taken in from each intake port 221 toward the bottom of each charging container; adhesives 224 each adsorbing and removing a nitrogen oxide in the air by circulating the air through the plurality of holes; and a plurality of outlet ports 225 each for exhausting air from which the nitrogen oxide has been removed. The denitrating device 220 is installed separately at a back stream side of the humidifier 210. The shield 230 is installed adjacently to the denitrating device 220 and an inner wall of the air duct 200 and closes the air duct 200 except the plurality of intake ports 221.

Description

  The present invention relates to an air purification device that purifies the air by removing nitrogen oxides in the air, and a ventilation system that includes the air purification device.

  In tunnels and indoor parking lots where vehicles pass, exhaust gas exhausted from the vehicle is contained in the atmosphere, and the exhaust gas contains airborne contaminants such as soot and nitrogen monoxide as the main components. Nitrogen oxide is included.

  Many techniques for removing nitrogen oxides by adsorbing them on an adsorbent have been proposed. For example, activated carbon is filled in a processing container, and nitrogen monoxide is adsorbed to the processing container through a gas containing nitrogen monoxide at 50 ° C. or less and a relative humidity of 90% or less, and then the processing container is heated to 100 to 200 ° C. A method of desorbing adsorbed nitric oxide has been proposed (see Patent Document 1).

An electrostatic precipitator provided at the forefront of the denitration device inlet, an ozonizer that generates ozone necessary to oxidize NO to NO ₂ , an ozone supply nozzle provided at the next stage of the electrostatic precipitator, and an ozone supply An apparatus provided with a fan or stirring device provided at the next stage of the nozzle and a NO ₂ absorption filter provided at the next stage of the fan or the stirring apparatus has also been proposed (see Patent Document 2). In Patent Document 2, there is also proposed an apparatus in which a humidifier is provided between the ozone supply nozzle and the NO ₂ absorption filter so that the NO ₂ purification capacity does not decrease even if the exhaust gas humidity at the apparatus inlet decreases.

  In addition, a technique has been proposed in which the gas to be treated is adjusted to a relative humidity of 85% or more and then brought into contact with the activated carbon-containing honeycomb adsorbent (see Patent Document 3). In this technique, by adjusting the humidity to a relative humidity of 85% or more, a thin water film is uniformly formed on the surface of the honeycomb-shaped adsorbent when the gas to be treated comes into contact with the activated carbon-containing honeycomb-shaped adsorbent, and nitrogen oxides are formed. Nitric acid, which is a compound that is oxidized on the surface of the honeycomb-shaped adsorbent and dissolves in water, is generated, and is eluted and detached from the activated carbon-containing honeycomb-shaped adsorbent. As a result, the activated carbon-containing honeycomb-shaped adsorbent is self-regenerated and the treatment life is significantly extended.

  In addition, a device equipped with a nitrogen oxide adsorbing means that is removed by passing through a solid adsorbent layer and discharged from a discharge port, or a carrier having a functional group carrying a hygroscopic salt adsorbs nitrogen oxide. An apparatus that includes an adsorbent and absorbs water vapor and reduces the reduction rate of adsorbed nitrogen oxides reduced by functional groups has been proposed (see Patent Documents 4 to 8).

JP-A-6-262025 JP 7-127400 A JP 2004-089963 A Japanese Patent Laid-Open No. 2004-290901 JP-A-2004-290902 JP 2004-290903 A JP 2004-290904 A JP 2008-221100 A

  The nitrogen oxide removing device (denitration device) described above is installed, for example, in an air passage that is constructed to exhaust the atmosphere including exhaust gas from the inside of a tunnel or an indoor parking lot. Since this denitration apparatus is installed for the purpose of removing nitrogen oxides and preventing the nitrogen oxides from being discharged to the outside, all of the air must pass through the denitration apparatus.

  The adsorbent for adsorbing and removing nitrogen oxides is preferably humidified on the upstream side as described in Patent Documents 2, 3, 5, 7, and 8 in order to ensure its performance. . Therefore, when installing a humidifier, it installs in the upstream of the denitration device.

  When the humidifier and the denitration device are installed in the air path, as shown in FIG. 1, the gap between the humidifying tank 101 of the humidifier 100 and the wall surface 110 of the air path is closed by the shielding plate 120, and humidification is performed. The apparatus 100 and the denitration apparatus 130 are connected and installed. A damper 102 for controlling the flow rate is provided at the air intake port of the humidifying tank 101 in order to appropriately humidify the taken-in air.

  Thereby, all of the atmosphere containing nitrogen oxides enters the humidification tank 101 through the damper 102 at an appropriate flow rate, and the atmosphere humidified almost uniformly in the humidification tank 101 passes through the intake 131 of the denitration apparatus 130. Then, after entering the denitration apparatus 130 and removing nitrogen oxides, it is discharged backward from the discharge port 132.

  In FIG. 1, the denitration device 130 has a plurality of intakes 131 for taking in the air that has passed through the humidification device 100, and a denitration tray 134 for filling an adsorbent 133 provided corresponding to each intake 131. The plurality of guide portions 135 for guiding the atmosphere from each intake port 131 to each adsorbent 133 and the plurality of discharge ports 132 for discharging the air that has passed through the adsorbent 133 from the lower side to the upper side are provided. ing.

  The opening area of the intake port of the humidifying tank 101 included in the humidifier 100 is smaller than the flow path area of the air passage, and the damper 102 suitable for the intake area is provided. And a relatively large pressure loss due to the influence of the damper 102 and the damper 102. Further, as soon as it enters the humidification tank 101, the flow channel area rapidly expands, rapidly shrinks at the intake 131 of the denitration apparatus 130, and again enters the denitration apparatus 130 and rapidly expands. Causes pressure loss.

  When the pressure loss increases, the load on a ventilation facility such as a fan or a blower that sucks the air after passing through the humidifying device 100 and the denitration device 130 increases. This increases power consumption and increases running costs. Further, in order to sufficiently remove nitrogen oxides, it is desirable to ensure a sufficient contact time with the adsorbent 133. However, as the load on the ventilation equipment increases, the suction force increases and the inside of the humidifier 100 increases. In addition, the flow rate of the atmosphere in the denitration apparatus 130 becomes faster, and this contact time cannot be secured sufficiently. As a result, the nitrogen oxide removal efficiency decreases.

  For this reason, provision of the apparatus and system which can fully reduce a nitrogen oxide and can reduce the load of ventilation equipment by reducing a pressure loss was desired.

  In order to solve the above-described problems, the present invention is an air purification apparatus that is installed in an air passage that circulates the air and purifies the air by removing nitrogen oxides in the air, A humidifier that is exposed to the flowing atmosphere and includes a plurality of spray nozzles for directly spraying water into the atmosphere, and a plurality of intake ports that are provided at regular intervals in the vertical direction to take in the atmosphere, A plurality of filling containers that are provided at regular intervals in the vertical direction, open at the top, and have a plurality of holes in the bottom, and a plurality of guides that guide the air taken in from each intake port toward the bottom of each filling container And an adsorbent that is filled in each filling container and that adsorbs and removes nitrogen oxides in the atmosphere by circulating the air through a plurality of holes, and is provided at regular intervals in the vertical direction. Multiple emissions to exhaust the removed air And a denitration device that is installed separately on the downstream side of the humidifier, and a shield that is installed adjacent to the denitration device and the inner wall of the air passage and closes the air passage except for a plurality of intakes An air purification device is provided that includes a plate.

  The guide portion connects the upper portion of the intake port and the upper portion of the side wall on the intake port side of the filling container, and is provided with a first inclined plate provided so as to be inclined at a first angle with respect to the horizontal direction, A filling container including a second inclined plate connected to an upper part of the inlet side wall and a lower part of the outlet side wall of the upper-stage filling container and inclined at a second angle with respect to the horizontal direction; The side wall of the intake port is inclined at the same angle as the first inclined plate with respect to the horizontal direction, and faces the lower side of the first inclined plate and the lower side of the intake side wall of the filling container. It is desirable to install it so that it is flush with the existing surface.

  Further, the air purification device can include a flow rate control means for controlling the flow rate attached so as to cover the plurality of intake ports of the denitration device. Furthermore, the air purification device can include a collection device for collecting suspended substances in the atmosphere.

  The humidifier may include a rotating unit that supports a plurality of spray nozzles and rotates the plurality of spray nozzles along a plane that intersects the air circulation direction. The rotating part can include a leg part, a rotating frame in which a plurality of spray nozzles are attached at regular intervals and rotatably supported by the leg part, and a drive source for rotating the rotating frame.

  In addition to the above configuration, the rotating part is rotatably supported by the leg part, the blade part rotatably supported by the leg part, and a plurality of spray nozzles spaced apart at a fixed interval and rotated to the leg part. It is also possible to provide a rotating frame that is supported so that the rotating frame rotates following the rotation of the blades.

  The rotating part includes a leg part, an outer circle part and an inner circle part having different diameters to which a plurality of spray nozzles are attached at regular intervals, and a column part that connects the outer circle part and the inner circle part. It is also possible to include a rotating frame that is rotatably supported by the leg part and to which the rotating blade is attached to the rotating frame for rotating the rotating frame by the flow of the atmosphere. This rotary blade may be adjustable in its mounting angle only in one direction, or may be adjustable in two directions.

  Moreover, it is not restricted to the structure provided with the above rotation parts, A thing with which several spray nozzles are spaced apart and arrange | positioned on the one plane which cross | intersects with respect to the distribution | circulation direction of air | atmosphere. It may be. For example, a plurality of spray nozzles may be arranged in a matrix along a plane orthogonal to the air circulation direction.

  In the case of a configuration in which a plurality of spray nozzles are simply arranged, a large number of spray nozzles are required for sufficient humidification, but humidification is performed so as to increase the humidification efficiency while reducing the number as much as possible. A swirl means that swirls the atmosphere can be provided on the upstream side of the apparatus. In addition, the spray nozzle can adjust the spray angle with respect to the direction of circulation of the atmosphere, so that not all spray nozzles spray only in one direction, but each sprays in a different direction. it can.

  In addition to the above air purification device, the present invention can also provide a ventilation system including the air purification device. The ventilation system can include switching means for switching the air flow path in the air path from a path through which the air purification apparatus passes, to another path through which the air purification apparatus does not pass when smoke is exhausted.

  By providing the air purification apparatus of the present invention, nitrogen oxides can be sufficiently removed, and pressure loss can be reduced. By reducing this pressure loss, the load on the ventilation facility can be reduced. it can. As a result, the life of the ventilation equipment can be extended and the running cost can be reduced.

  Moreover, pressure loss can be further reduced by adopting the structure of the guide portion as described above. Compared to the conventional configuration in which the damper 101 is provided in the humidifying device 100 as shown in FIG. 1, the pressure loss can be reduced by providing the damper in the denitration device. Furthermore, it is possible to remove suspended substances in the atmosphere by further providing a collection device.

  By configuring the humidifier as described above, the humidification efficiency can be improved even if the number of spray nozzles is reduced.

  By providing the ventilation system of the present invention, nitrogen oxides can be sufficiently removed, and pressure loss can be reduced. By reducing this pressure loss, the load on the ventilation facility can be reduced. . As a result, the life of the ventilation equipment can be extended and the running cost can be reduced. Further, it is possible to reduce not only the denitration but also the pressure loss at the time of flue gas.

The figure which showed one structural example of the conventional air purification apparatus. The figure which showed one structural example of the air purification apparatus of this invention. The figure which expanded and showed the filling tray of the denitration apparatus. The figure which showed the place which attached the damper. The figure which showed another structural example of the air purification apparatus of this invention. The figure which showed 1st Embodiment of the humidifier. Sectional drawing which showed schematic structure of the spray nozzle. The front view which showed the front-end | tip part of the spray nozzle. The figure which showed 2nd Embodiment of the humidifier. The figure which showed 3rd Embodiment of the humidifier. The figure which showed 4th Embodiment of the humidifier. The figure which showed one structural example of the ventilation system of this invention.

  FIG. 2 is a diagram showing one configuration example of the air purification device of the present invention. The air passage 200 is a passage through which air flows connecting a tunnel, an indoor parking lot, and the like through which vehicles pass. The air passage 200 is constructed by concrete, for example.

  The air purification device is installed in the air passage 200, and includes a humidifying device 210 for humidifying the atmosphere, a denitration device 220 for removing nitrogen oxides contained in the atmosphere, and a plurality of denitration devices 220. Except for the intake port 221, it is configured to include a shielding plate 230 that closes the air passage 200.

  The humidifier 210 is exposed to the atmosphere that circulates in the air passage 200 and includes a plurality of spray nozzles 211 for spraying water into the atmosphere. Since this humidifier 210 does not have a storage container called a humidification tank 101 unlike the conventional humidifier 100 shown in FIG. 1, there is no sudden reduction or rapid expansion of the flow path area of the atmosphere. Pressure loss can be reduced.

  The denitration apparatus 220 can have the same configuration and structure as the conventional denitration apparatus 130 shown in FIG. Specifically, the denitration device 220 is provided at regular intervals in the vertical direction, and is provided with a plurality of intake ports 221 for taking in the atmosphere and at regular intervals in the vertical direction, with the top open and a plurality of at the bottom. A filling tray 222 as a plurality of filling containers having holes and a plurality of guide portions 223 for guiding the air taken in from each intake port 221 toward the bottom of each filling tray 222 are provided.

  Further, the denitration apparatus 220 is filled in each filling tray 222 and adsorbent 224 such as activated carbon that adsorbs and removes nitrogen oxides in the atmosphere by circulating the atmosphere through a plurality of holes, and constant in the vertical direction. And a plurality of outlets 225 for discharging the air from which nitrogen oxides have been removed. The denitration device 220 is installed separately on the downstream side of the humidifying device 210.

  The shielding plate 230 closes the air passage 200 except for the plurality of intake ports 221 so as to prevent the humidified air from flowing to the downstream side of the denitration device 220 without passing through the denitration device 220. To be provided. For this reason, all the humidified air is taken in from the plurality of intake ports 221, and after nitrogen oxides are adsorbed and removed, they are discharged from the plurality of exhaust ports 225.

  In FIG. 2, the humidifier 210 is provided with a plurality of spray nozzles 211 provided at regular intervals in a pipe 212 extending in the vertical direction from the floor of the air passage 200, and water is directed toward the denitration device 220 installed on the downstream side. Is spraying. The shape and structure of the spray nozzle 211 may be anything as long as water can be sprayed in the form of a mist. In one example, a high-pressure spray nozzle having a large number of small holes at the tip can be mentioned.

  When water pressurized by a pump is supplied into the nozzle, the high-pressure spray nozzle sprays, for example, in a mist form through a large number of small holes. Each mist-like small water particle is easy to evaporate by heat exchange with the circulating air, and makes it possible to effectively humidify the air. For this reason, the high-pressure spray method employing a high-pressure spray nozzle can achieve humidification with a high vaporization rate.

  By adopting such a configuration without a humidifying tank and adopting a high-pressure spray method that can realize humidification with a high vaporization rate, it is possible to realize sufficient humidification and reduce pressure loss as much as 20 Pa at maximum. it can.

  As shown in FIG. 3A, the guide unit 223 included in the denitration apparatus 220 connects the upper part of the intake port 221a and the upper part of the intake port side wall 226 of the filling tray 222a, and is connected to the horizontal direction. A first inclined plate 223a provided so as to be inclined at one angle is connected to the upper part of the intake-side side wall 226 of the filling tray 222a and the lower part of the discharge-side side wall 227 of the upper-stage filling tray 222b. And a second inclined plate 223b provided to be inclined at a second angle with respect to the direction. In FIG. 3A, a first inclined plate 223c is further provided to be inclined at a first angle, and a second inclined plate 223d is provided to be inclined at a second angle. Is shown.

  The atmosphere is taken in from the inlet 221a, collides with the inlet side wall 226 of the filling tray 222a, and flows toward the first inclined plate 223c below. Then, the atmosphere collides with the first inclined plate 223c, changes the flowing direction, and flows toward the second inclined plate 223d. Thereafter, the atmosphere changes the direction of flow by colliding with the second inclined plate 223d, flows toward the bottom of the filling tray 222a, passes through a large number of small holes provided in the bottom, and passes between the adsorbents 224. The air from which nitrogen oxides have been adsorbed and from which nitrogen oxides have been removed is discharged from the outlet 225a.

  In the case of such a structure of the filling tray 222a, the atmosphere taken in from the intake port 221a collides with the intake side wall 226 of the filling tray 222a and then collides with the first inclined plate 223c. The side wall 226 protrudes downward, and the cross-sectional area of the flow path is reduced at the protruding portion, resulting in a relatively large pressure loss. Therefore, as shown in FIG. 3B, the filling tray 222a is manufactured such that the inlet side wall 226 of the filling tray 222a is inclined at the same angle as the first inclined plate 223a with respect to the horizontal direction. Can do.

  Since the side wall 226 is inclined at the same angle as the first inclined plate 223a, a surface facing the lower side of the first inclined plate 223a and a surface facing the lower side of the intake side wall 226 of the filling tray 222a Accordingly, the air taken in from the intake port 221a can be smoothly guided to the second inclined plate 223d. Such an atmospheric collision is unlikely to occur, and a pressure loss as high as 50 Pa can be reduced by employing a structure in which the expansion and reduction of the channel cross-sectional area are minimized.

  In the air purification device, the atmosphere is sufficiently humidified by the humidifier to increase the denitration efficiency, then the atmosphere is sent to the denitration device, and the NOx removal device is sufficiently brought into contact with the surface of the adsorbent to adsorb and remove nitrogen oxides. Therefore, it is necessary to send the air to the humidifier and the denitration device at an appropriate flow rate. In order to control the flow rate, a damper as a flow rate control means is provided.

  In the conventional apparatus, as shown in FIG. 4A, the damper 102 is attached so as to close the opening formed in the humidifying tank 101 of the humidifying apparatus 100. The damper 102 can supply air at an appropriate flow rate into the humidifying tank 101, and can subsequently supply air to the denitration device on the downstream side at the appropriate flow rate.

  The opening formed in the humidifying tank 101 is formed in an appropriate size because a large amount of air flows in at a time and cannot be sufficiently humidified if it is immediately discharged. For this reason, the opening cannot be formed so large. As a result, the opening area of the damper 102 is limited.

  In the air purification apparatus of the present invention, as shown in FIG. 2, the humidifier 220 is exposed to the atmosphere, and the entire atmosphere flowing through the air passage 200 can be appropriately humidified. As shown, the damper 240 is provided on the intake port side of the denitration apparatus 220 so as to cover the entire plurality of intake ports 221. By this damper 240, the atmosphere can be supplied into the denitration apparatus 220 at an appropriate flow rate.

  The size of each intake port 221 of the denitration apparatus 220 is determined in advance, and the opening area of all the intake ports 221 is larger than the opening area of the humidification tank 101. For this reason, the opening area of the damper 240 can be increased, the flow velocity of the atmosphere passing through the damper 240 can be reduced, and the pressure loss of up to 10 Pa can be reduced.

  The air purification apparatus of the present invention can further include a collection device for collecting floating substances. As the collection device, any device known so far may be used as long as it can collect floating substances floating in the atmosphere and remove them from the atmosphere. For example, a filter, a dust collector, etc. are mentioned. As shown in FIG. 5, the collecting device is desirably installed on the upstream side of the humidifying device 210. This is because suspended substances may adhere to the spray nozzle 211 of the humidifying device 210 or the bottom of the filling tray 222 of the denitration device 220 or the adsorbent 224, causing clogging or reducing the adsorption performance.

  When the electrostatic precipitator 250 is used as the collection device, the electrostatic precipitator 250 charges the floating substance in the atmosphere by the band electrode 251, and the charged floating substance is applied to the dust collecting electrode 252 with Coulomb force (electrostatic attractive force). To collect dust. For example, the electrostatic precipitator 250 generates negative ions by corona discharge of the band electrode 251, the negative ions adhere to floating substances and are charged negatively, and the floating substances charged to the negative ions are collected by Coulomb force. It is attracted to the dust electrode 252 and collected. By providing such a collecting device such as the electric dust collecting device 250, suspended substances contained in the atmosphere can also be removed. In order to supply all the air containing floating substances to the electrostatic precipitator 250, the air passage 200 is closed on the front surface of the electrostatic precipitator 250 except for the air intake port of the electrostatic precipitator 250. A closure plate 260 is provided.

  As shown in FIG. 2, the humidifier 210 can humidify by spraying water from a plurality of spray nozzles 211, and realize sufficient humidification by increasing the number of spray nozzles 211 installed. Can do. However, in recent years, in order to reduce costs, it is desired to improve the humidification efficiency while reducing the number of installed spray nozzles 211.

  In view of this, the humidifier 210 supports, for example, a plurality of spray nozzles 211 as shown in the side view of FIG. 6A and the front view of FIG. 6B, and allows the plurality of spray nozzles 211 to flow in the atmosphere. It is possible to include a rotating unit 213 that rotates along a plane intersecting with respect to. The rotating part 213 includes a leg part 214 erected in the vertical direction, a rotating frame 215 that is attached to the leg part 214 and supports a plurality of spray nozzles 211, and a drive source 216 that drives the rotating frame 215. .

  The rotating frame 215 is configured by a hollow rod-like member, and a central portion thereof is connected to a rotating shaft of the driving source 216 and is rotatably supported on the upper portion of the leg portion 214. Two spray nozzles 211 are attached to the rotating frame 215 at regular intervals with the rotating shaft as the center, two from the center toward both ends. Water is supplied from the pump (not shown) to the spray nozzles 211 through the legs 214 and the inside of the rotary frame 215, and is sprayed from the spray nozzles 211.

  For example, as shown in FIG. 7, the spray nozzle 211 includes a cylindrical main body 300 and a nozzle tip 302 fixed to the inner surface of the injection side wall 301 of the main body 300. In the main body 300, one end of a hollow cylindrical peripheral wall 303 is closed by an injection side wall 301, a nozzle hole 304 is provided at the center, and the other end is an opening 305. The opening 305 communicates with the water supply path, and can receive water into the hollow portion 306 in the main body 300 through the opening 305.

  The nozzle tip 302 has a substantially disk shape, is molded when the main body 300 is molded, and is fixed to the inner surface of the ejection side wall 301 of the main body 300. The nozzle tip 302 has an injection hole in the center that communicates with the injection hole 304 at the center of the injection side wall 301 of the main body 300, and sprays water in the form of a mist from the injection hole via the injection hole 304. The injection hole includes a tapered hole portion 307 having a diameter reduced from the water inflow side, and a small diameter hole portion 308 that continues to the tapered hole portion 307 and communicates with the injection port 304.

  As the nozzle tip 302, a nozzle chip having a turning groove 309 as shown in FIG. FIG. 8 shows that the turning groove 309 is composed of four grooves that are curved in an arc shape at an interval of approximately 90 degrees, and the inner peripheral end thereof communicates with the peripheral edge of the tapered hole portion 307. Has been.

  By adopting the spray nozzle 211 having such a swirling groove 309, the water flowing into the main body 300 is sent to the nozzle tip 302 through the hollow portion 306, becomes a swirling flow through the swirling groove 309 of the nozzle tip 302, and is injected. It is sent to the tapered hole portion 307 of the hole and collides while turning along the inner peripheral surface thereof, and water droplets are refined. For this reason, fine water droplets are ejected from the small-diameter hole 308. At this time, the diameter of the water droplet is about 10 to 30 μm.

  The pressure of water supplied to the spray nozzle 211 is preferably 0.1 to 10 MPa. Since the spray nozzle 211 shown in FIGS. 7 and 8 is merely an example, if the spray nozzle 211 can properly spray water in a mist shape, the tip has a large number of small holes. Any nozzle known so far, such as a nozzle, can be employed.

  In the embodiment shown in FIG. 6, the configuration in which the rotating frame 215 is driven by the drive source 216 is illustrated, but the rotating frame 215 can be driven by the flow of the atmosphere only by supporting the rotating frame 215 on the rotating shaft. is there. As an example, as shown in FIG. 9, it is possible to employ a rotary shaft provided at the upper part of the leg portion 214 so as to be rotatable and having at least two blade portions 217 in addition to the rotary frame 215. it can. In the humidifying device 210, at least two blade portions 217 are rotated by receiving the air flow, and the rotating frame 215 is rotated following the rotation. Thus, since the rotating frame 215 can be rotated without using the drive source 216, the power consumption can be reduced.

  Further, in order to sufficiently humidify between the humidifying device 210 and the denitration device 220, swirling means for turning the atmosphere into a swirling flow can be provided in order to take a long time for the atmosphere to contact the water particles. This swivel means is preferably installed on the upstream side of the humidifier 210 and includes a plurality of fins that protrude in a direction opposite to the air circulation direction and that rotates in the direction opposite to the rotating frame 215. .

  By providing such a turning means, the rotational speed of the rotating frame 215 relative to the atmospheric flow can be relatively increased without increasing the rotational speed of the drive source 216. Since it is not necessary to increase the rotational speed of the drive source 216, the deterioration of the drive source 216 can be suppressed, and the drive source 216 can be used over a long period of time. Further, since the rotation speed of the drive source 216 can be suppressed, it is possible to reduce the amount of power supplied to the drive source 216.

  The rotating frame 215 can be rotated about its central portion, or can be connected to one end of the rotating frame 215 and rotated about its one end. For example, two rotation shafts extending in the same direction as the air flow direction and in opposite directions are rotatably provided on the upper portion of the leg portion 214, and one end portions of the two rotation frames 215 are connected to the rotation shafts and are in opposite directions. Can be rotated to. Adopting such a configuration and spraying water increases the relative rotational speed of each other. Therefore, even if the rotational speed of each rotating frame 215 is slow, a large number of spray nozzles 211 on a single plane. It is possible to form a pseudo state in which the are arranged. As a result, the burden on the drive source 216 can be reduced, the deterioration of the drive source 216 can be suppressed, and the drive source 216 can be used for a long time.

  Further, as shown in FIG. 10, the rotating part 213 includes a leg part 214, an outer circle part 218a and an inner circle part 218b having different diameters to which a plurality of spray nozzles 211 are attached at regular intervals, and an outer circle part. 218a and the inner circle part 218b may be provided, and the support part 219 may include a rotating frame 215 rotatably supported by the leg part 214. The rotating unit 213 may be configured such that a rotating blade 270 for rotating the rotating frame 215 by an atmospheric flow is attached to the rotating frame 215.

  For example, the rotary blade 270 can adjust the attachment angle in accordance with the length by which the lower end portion in the vertical direction is fixed and the upper end portion protrudes forward. Similarly, in the horizontal direction, for example, the left end portion is fixed toward the horizontal direction, and the attachment angle can be adjusted according to the length of the right end portion protruding forward. The rotary blade 270 can be adjusted in only one direction as described above, or can be adjusted in two directions, the vertical direction and the horizontal direction.

  In FIG. 10, all of the rotor blades 270 are attached with the blade surfaces facing the front. However, the rotor blades 270 are arbitrary in either the left or right direction with respect to the support column 219 extending in the vertical direction. It can be adjusted to any angle in either the upper or lower direction with respect to the support column 219 extending in the horizontal direction. By enabling fine adjustment in this way, it is possible to adjust the mounting angle so that the air flow can be more effectively received. In addition, as a mechanism for adjusting the attachment angle of the rotary blade 270, it is not limited to the above, and any mechanism known so far can be adopted.

  Further, as shown in FIG. 11, the humidifying device 210 may have a plurality of spray nozzles 211 simply arranged at a predetermined interval on a plane that intersects the air circulation direction. In this case, it can be arranged in a matrix along the plane.

  Although the spray nozzle 211 may be fixed, it is preferable that the spray nozzle 211 is rotatably attached to the support frame 280 so that the spray angle with respect to the direction in which the air flows can be adjusted. For example, the injection angle can be rotated every 45 degrees around the support frame 280.

  In the case of a configuration in which a plurality of spray nozzles 211 are simply arranged, a large number of spray nozzles 211 are required for sufficient humidification, but the number of spray nozzles 211 can be reduced as much as possible to increase the humidification efficiency. Further, swirling means that turns the atmosphere into a swirling flow may be provided on the upstream side of the humidifying device 210. In addition, the spray nozzle 211 can adjust the spray angle with respect to the air circulation direction as described above, and not all the spray nozzles spray only in one direction, but can spray each in a different direction. It is preferable to do so.

  In addition to the above air purification device, the present invention can also provide a ventilation system including the air purification device. The ventilation system includes an air purification device including the humidifying device 210, the denitration device 220, and the shielding plate 230 described above. In addition, as shown in FIG. 12, the ventilation system switches the air circulation path in the air passage 200 from a path through which the air purification apparatus is passed to another path that does not allow the air purification apparatus to pass through when exhausting smoke. Switching means can be provided. Here, the switching means is the bypass damper 400.

  In order for the air purification device to allow all of the air from the air supply port 401 to flow in, the air path 200 is closed by the closing plate 260 except for the air intake port of the electric dust collector 250 provided in the air purification device. . In the embodiment shown in FIG. 12, the closing plate 260 and the bypass damper 400 are closed. Further, the space surrounding the denitration device 220 is shielded by the shielding plate 230 between the electrostatic precipitator 250 and the denitration device 220. As a result, all of the air from the air supply port 401 does not flow toward the exhaust port 402 except for passing through the air purification device or opening the bypass damper 400 to pass through.

  A fan or blower (not shown) is installed in the exhaust port 402 as a ventilation facility, and the atmosphere in the air passage 200 is sucked by the operation of the ventilation facility, and then the air is sucked from the air supply port 401.

  During normal operation (during NOx removal), as shown by the solid arrow, the air sucked in this way flows into the electrostatic precipitator 250. First, suspended particles in the atmosphere are charged by the electrostatic precipitator 250. However, it is collected by the Coulomb force and collected at the dust collecting electrode. Thereafter, the atmosphere is humidified by spraying water by the humidifying device 210 and sent into the denitration device 220. In the denitration apparatus 220, the nitrogen oxides contained in the atmosphere are adsorbed and removed as the atmosphere passes between the adsorbents. The air that exits the denitration device 220 moves in the air passage 200 toward the exhaust port 402, is sucked into the fan or blower through the exhaust port 402, and is discharged to the outside.

  On the other hand, when a fire or the like occurs, the bypass damper 400 is opened to discharge the smoke exhausted from the air supply port 401 to the outside. Therefore, as shown by the dotted arrow, the smoke is not sent to the electrostatic precipitator 250, but is sent to the bypass damper 400, moves in the air passage 200 toward the exhaust port 402, and the exhaust port. The air is sucked into the fan or blower through 402 and discharged to the outside.

  By providing the bypass damper 400 in this way and changing the path through which the air flows during desulfurization and smoke emission, pressure loss during smoke emission can be reduced, and the exhaust smoke can be quickly discharged to the outside. It becomes possible. In addition, by providing such a bypass air path independently, it becomes possible to reduce pressure loss by a maximum of 50 Pa.

  Thus, by reducing the pressure loss in each place, it is possible to reduce the load on the ventilation facility, extend the life of the ventilation facility, and reduce the running cost. In addition, when designing a ventilation facility, it is possible to select a ventilation facility with a small capacity, thereby reducing costs. Furthermore, since the flow velocity of the atmosphere through which the electrostatic precipitator 250 and the adsorbent are passed can be lowered, it is possible to sufficiently remove suspended substances and nitrogen oxides.

  The air purification device and the ventilation system of the present invention have been described in detail with reference to the embodiments shown in the drawings, but the present invention is not limited to the above-described embodiments, and other embodiments and Additions, changes, deletions, and the like can be made within the scope that can be conceived by those skilled in the art, and any aspect is included in the scope of the present invention as long as the effects and advantages of the present invention are exhibited. . Therefore, the adsorbent may be other than activated carbon as long as it can adsorb and remove nitrogen oxides, and an adsorbent having an appropriate particle size can be adopted. In addition, the material and size of each device can be of an appropriate material and size in accordance with the air path and the components of the circulating air.

DESCRIPTION OF SYMBOLS 100 ... Humidifying device, 101 ... Humidifying tank, 102 ... Damper, 110 ... Wall surface, 120 ... Shielding plate, 130 ... Denitration device, 131 ... Intake port, 132 ... Discharge port, 133 ... Adsorbent, 134 ... Denitration tray, 135 ... Guide part, 200 ... Air path, 210 ... Humidifier, 211 ... Spray nozzle, 212 ... Pipe, 213 ... Rotating part, 214 ... Leg part, 215 ... Rotating frame, 216 ... Drive source, 217 ... Blade part, 218a ... Outside Circle part, 218b ... Inner circle part, 219 ... Post part, 220 ... Denitration device, 221, 221a ... Intake port, 222, 222a, 222b ... Filling tray, 223 ... Guide part, 223a, 223c ... First inclined plate, 223b, 223d ... second inclined plate, 224 ... adsorbent, 225, 225a ... discharge port, 226, 227 ... side wall, 230 ... shielding plate, 240 ... damper, 250 ... electrostatic precipitator 251 ... Band electrode, 252 ... Dust collecting electrode, 260 ... Closing plate, 270 ... Rotating blade, 280 ... Support frame, 300 ... Main body, 301 ... Injection side wall, 302 ... Nozzle tip, 303 ... Perimeter wall, 304 ... Jet, 305 ... Opening, 306 ... hollow part, 307 ... tapered hole part, 308 ... small diameter hole part, 309 ... turning groove, 400 ... bypass damper, 401 ... air supply port, 402 ... exhaust port

Claims (12)

An air purification device that is installed in an air passage that circulates the air and purifies the air by removing nitrogen oxides in the air,
A humidifier comprising a plurality of spray nozzles that are exposed to the atmosphere flowing through the air passage and spray water directly into the atmosphere;
A plurality of intake ports provided at regular intervals in the vertical direction, for taking in the atmosphere, a plurality of filling containers provided at regular intervals in the vertical direction, open at the top and having a plurality of holes at the bottom, A plurality of guide portions for guiding the air taken in from the intake port toward the bottom of each of the filling containers, and filling the filling containers, and circulating the air through the plurality of holes. An adsorbent that adsorbs and removes nitrogen oxides in the atmosphere; and a plurality of outlets that are provided at regular intervals in the vertical direction and exhaust the atmosphere from which the nitrogen oxides have been removed. A denitration device that is spaced apart on the downstream side of the device;
An air purification apparatus, comprising: a shielding plate that is installed adjacent to the denitration apparatus and an inner wall of the air passage, and closes the air passage except for the plurality of intake ports.   The guide portion connects the upper part of the intake port and the upper part of the intake port side wall of the filling container, and is provided with a first inclined plate provided to be inclined at a first angle with respect to a horizontal direction, A second inclined plate provided to connect the upper part of the inlet side wall of the filling container and the lower part of the outlet side wall of the upper filling container, and to be inclined at a second angle with respect to the horizontal direction; And the intake side wall of the filling container is inclined at the same angle as the first inclined plate with respect to the horizontal direction, and the surface facing the lower side of the first inclined plate and the intake of the filling container The air purification device according to claim 1, wherein the air purification device is installed so as to be flush with a surface facing downward of the mouth side wall.   The air purification device according to claim 1 or 2, further comprising a flow rate control means for controlling a flow rate attached so as to cover the plurality of intake ports of the denitration device.   The air purification device according to any one of claims 1 to 3, further comprising a collection device for collecting the suspended matter in the atmosphere.   5. The humidifying device according to claim 1, further comprising a rotating unit that supports the plurality of spray nozzles and rotates the plurality of spray nozzles along a plane that intersects the circulation direction of the atmosphere. The air purification device according to item.   The rotating portion includes a leg portion, a rotating frame on which the plurality of spray nozzles are attached at regular intervals and rotatably supported by the leg portion, and a drive source for rotating the rotating frame. The air purification apparatus according to claim 5.   The rotating part is rotatably supported by the leg part, the blade part rotatably supported by the leg part, and rotated by the atmospheric flow, and the plurality of spray nozzles spaced apart from each other at a predetermined interval, and rotated to the leg part. The air purification device according to claim 5, further comprising a rotating frame that is supported so that the rotating frame rotates following the rotation of the blade portion.   The rotating part includes a leg part, an outer circle part and an inner circle part having different diameters to which the plurality of spray nozzles are attached at regular intervals, and a column part that connects the outer circle part and the inner circle part. A rotary frame that is rotatably supported by the leg portion, and a rotary blade attached to the rotary frame for rotating the rotary frame by the atmospheric flow. Item 6. The air purification device according to Item 5.   The air purification apparatus according to any one of claims 1 to 4, wherein the plurality of spray nozzles are arranged at a predetermined interval on a plane that intersects the air circulation direction. The air purification device according to any one of claims 1 to 9, further comprising swirling means that swirls the atmosphere on an upstream side of the humidifier. The air purification device according to claim 9, wherein the spray nozzle is capable of adjusting an injection angle with respect to a flow direction of the air.   The air purification device according to any one of claims 1 to 11, wherein the air flow passage in the air passage is not allowed to pass through the air purification device from a path through which the air purification device passes when smoke is exhausted. A ventilation system comprising switching means for switching to a path.