JP2008032302A - Air washer - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide an air washer having improved saturating efficiency by improving the contact efficiency of sprayed water with air. <P>SOLUTION: The air washer is provided for passing air A to be treated into a casing 2. Spray areas 2a, 2b, 2c, 2d are set in the flow path cross section of the casing 2, and spray means 5 are arranged at central positions in the spray areas 2a, 2b, 2c, 2d for spraying the sprayed water from the center of the spray areas 2a, 2b, 2c, 2d to the surroundings. The spray means 5 spray the sprayed water all over the spray areas 2a, 2b, 2c, 2d. <P>COPYRIGHT: (C)2008,JPO&INPIT

Description

  The present invention relates to an air washer and relates to a technique for removing dust and harmful gas in the air and humidifying with high saturation efficiency in an air conditioner used in a semiconductor factory or the like.

  Conventionally, as this type of technology, for example, there is one described in Patent Document 1. This is an air washer 51 as shown in FIG. 18, and has a water spray chamber 53 of a predetermined length inside a main body casing 52 having a rectangular channel cross section. The water spray chamber 53 is connected to a duct (not shown) at an air inlet 53a formed at one end thereof, and air A flowing in from this duct is formed at the other end through the flow path of the water spray chamber 53. It flows out from the air outlet 53b.

  In the water spray chamber 53, a first washer medium 54a is disposed at the position of the air inlet 53a, and a second washer medium 54b is disposed at the position of the air outlet 53b. Each of the washer media 54a, 54b It has a shape substantially equal to the cross section of the flow path, is made of polyvinyl chloride fiber, stainless steel wire, or the like, and has a mat shape having a thickness of, for example, about 25 mm to 50 mm.

  Inside the water spray chamber 53, a metal mesh 55 is arranged in parallel with the first washer medium 54a on the first washer medium 54a side. The wire mesh 55 has a wire diameter of 0.5 to 1.0 mm and a wire interval of about 2 to 5 mm. A plurality of first stage nozzles 56 communicating with a circulating water supply system, which will be described later, are arranged on the downstream side of the metal mesh 55, and a plurality of second stage nozzles 57 communicating with a makeup water supply system (not shown) are first. It is arranged at substantially the same position as the stage nozzle 56. The first stage nozzle 56 sprays spray water reaching the first washer medium 54a toward the wire mesh 55 in the direction opposite to the air flow, and the second stage nozzle 57 is directed in the forward direction with the air flow. Then, spray water is sprayed onto the second washer medium 54b.

  A water storage tank for receiving the spray water flowing down is provided below the water spray chamber 53, and a circulating water supply system 59 that circulates the circulating water staying in the water storage tank to the first stage nozzle 56 is provided in the water spray chamber 53. It communicates with the lower part. The circulating water supply system 59 is connected to a suction pipe 60 that opens at a lower portion of the water storage tank 58, a circulation pump 61 connected to the suction pipe 60, a motor 62 that drives the circulation pump 61, and a discharge port of the circulation pump 61. The first stage discharge pipe 63 disposed above the water spray chamber 53 and a plurality of first stage branch pipes 64 branched from the first stage discharge pipe 63 and disposed in the vertical direction in the water spray chamber 53. Each of the first stage branch pipes 64 is provided with the plurality of first stage nozzles 56 described above.

  An eliminator 70 for removing water droplets and the like contained in the air that has passed through the water spray chamber 53 is disposed on the downstream side of the water spray chamber 53, and an air outlet 53 b of the water spray chamber 53 includes a water spray chamber 53 and A cooling chamber 71 of a predetermined length having the same channel cross-sectional shape is connected.

  A cooling coil 72 is provided inside the cooling chamber 71 as a cooler, and a blower (not shown) is disposed on the downstream side of the water spray chamber 53. By operating this blower, the water spray chamber 53 is provided. Air is introduced into the flow path.

  The operation of the above configuration will be described. The air A flows from the air inlet 53a into the water spray chamber 53 through the first washer medium 54a. The circulating water from the water storage tank is sprayed from the first stage nozzle 56 so as to oppose the air flow. The spray water (particularly one having a large particle diameter) collides with the wire mesh 55 to be finely divided, and collides with dust and harmful gas in the air.

  Part of the fine particles of spray water colliding with dust and harmful gas in the air reaches the first washer medium 54a, and the first washer medium 54a captures the spray water accompanied by dust and harmful gas. In the first washer medium 54a, the sprayed water is washed away from the dust adhering to the first washer medium 54a, and toxic gas is taken in and flows into the water storage tank. The spray water evaporates and humidifies the air in the process of flowing down.

  Part of the spray water that has not collided with the l-th washer medium 54a collides with the ceiling surface, wall surface, or water storage surface of the water spray chamber 53, but otherwise it travels in the air stream and evaporates in the process. The air is humidified and dust and harmful gas in the air are taken in and reach the second washer medium 54b, and the second washer medium 54b captures the spray water accompanied by dust and harmful gas.

  Then, when clean water or pure water is sprayed from the second stage nozzle 57 against the air flow in the water spray chamber 53, the clean water or pure water spray water together with dust and harmful gas remaining in the air, the second washer. It reaches the medium 54b, and the second washer medium 54b captures the spray water accompanied by dust and harmful gas. In the second washer medium 54b, the spray water is washed away from the dust adhering to the second washer medium 54b and flows into the water storage tank by taking in harmful gas. The spray water evaporates and humidifies the air in the process of flowing down. The clean water or pure water that has flowed into the water storage tank joins the circulating water as make-up water, and sprays as circulating water from the first stage nozzle 56 through the circulating water supply system 59.

  The air that has passed through the second washer medium 54 b flows into the eliminator 70 from the air outlet as purified air that has been purified and sufficiently humidified, and the eliminator 70 removes water droplets in the air. The air flowing out from the eliminator 70 is guided to the cooling chamber 71 and cooled by the cooling coil 72.

  Another prior art is described in Patent Document 2. This is an air washer as shown in FIG. 19, and the basic configuration is the same as that of Patent Document 1, and the difference is as follows.

Inside the water spray chamber 53, a wire mesh 100 is arranged in parallel with the air flow at each corner of the flow path cross section. The wire mesh 100 has a wire diameter of 0.5 to 1.0 mm and a wire interval of about 2 to 5 mm. A plurality of nozzles 56 communicating with the circulating water supply system are disposed on the back surface of the metal net 100, and the nozzles 56 spray the spray water in a direction orthogonal to the air flow A. Each nozzle 56 has a spray center (of the cross section of the flow path) from one of the outer corners in each spray area having a rectangular shape (square or rectangular) set by dividing the flow path cross section perpendicular to the air flow A into a plurality of sections. Spray the spray water toward the diagonal on the center side. The spray water sprayed from each nozzle 56 is sprayed in a fan-shaped spray water pattern parallel to the flow path cross section. At this time, the spray water having a large particle diameter becomes fine particles by collision with the wire mesh. For this reason, the contact efficiency between spray water and air is improved, and the saturation efficiency is increased.
JP 2001-96123 A JP 2001-235194 A

However, in the one described in Patent Document 1, the metal mesh 55 has a shape substantially equal to the cross section of the air flow path, and there is a problem that the resistance becomes a hindrance to the air flow.
Spray water is sprayed from the first stage nozzle 56 toward the upstream side of the air flow, and the spray water having a large particle size collides with the wire mesh 55 to form fine particles. However, the spray water rides on the air flow. If it moves to the downstream side, it collides with the sprayed water sprayed from the first stage nozzle 56, the sprayed water overlaps and the sprayed water droplets become larger, and the effect of atomization due to the collision with the wire mesh 55 is weakened.

  In what is described in Patent Document 2, a spray area is set by dividing a flow path cross section orthogonal to the air flow A into a plurality of spray areas, and the spray center (center of the flow path cross section) from one outer corner in each spray area. Spray the spray water toward the opposite side of the side.

  In this configuration, when the diffusion angle of the nozzle 56 is set to a large angle in order to diffuse the spray water, the spray water contacts the inner wall surface of the main body casing 52 before reaching a sufficient flight distance in the vicinity of each corner of the flow path cross section. As a result, the spray water does not spread sufficiently and the spray water droplets become large, and the contact efficiency with the air decreases. Conversely, when the diffusion angle is set so that the spray water does not contact the inner wall surface of the main body casing 52 in the vicinity of each corner of the flow path cross section, a portion where the spray water and the air do not contact is generated in the vicinity of the corner.

  Inside the main casing 52, the spray water sprayed from the nozzles 56 gathers at the spray center in the spray area, and the spray water droplets become large, so that the efficiency of contact with air decreases. Since the nozzles 56 are arranged so as to surround the air flow inside the main body casing 52, the piping becomes complicated as the number of nozzles increases. Moreover, piping becomes resistance which inhibits the flow of air, and becomes dead space which does not allow spray water to pass.

  The present invention solves the above-described problems, and an object thereof is to provide an air washer that can improve the saturation efficiency by increasing the contact efficiency between spray water and air.

  In order to solve the above-described problems, an air washer according to the present invention is an air washer that ventilates air to be treated in a casing, in which a spray area is set in a cross section of the flow path of the casing and sprayed from the center of the spray area toward the periphery. The spraying means for spraying water is disposed at the center position of the spray area, and the spraying means sprays spray water over the entire spray area.

In addition, a plurality of spray areas are set in the flow path cross section of the casing, and spray means are arranged at the center position of each spray area.
The spraying means has a spray nozzle for spraying spray water and a wire mesh disposed in front of the spray nozzle, and the spray water sprayed from the spray nozzle reaches the wire mesh at substantially the same distance.

  The spraying means has a plurality of spray nozzles, each spray nozzle sprays spray water in a direction perpendicular to the air flow direction of the air to be treated toward different directions of the spray area, and from each spray nozzle. The spray pattern of the spray water to be sprayed has a flat fan shape, and the flat surface is inclined at a predetermined angle with respect to the air flow direction of the processing target air.

  The spraying means has a plurality of spray nozzles, each spray nozzle sprays spray water in a direction perpendicular to the air flow direction of the air to be treated toward different directions of the spray area, and from each spray nozzle. The spray pattern of spray water to be sprayed has a flat fan shape, and at least the flat surfaces of both adjacent spray patterns are at different positions in the air flow direction of the processing target air.

  Further, the metal mesh of the spraying means opens toward the airflow direction of the air to be treated and has a shape having a surface along the airflow direction, and supports the mesh netting material. It comprises a frame attached to a water supply pipe for supplying spray water to the nozzle.

  Further, the plurality of spray nozzles are arranged radially around the axis of the water supply pipe arranged along the air flow direction, and the mesh material forms a cylindrical surface concentric with the axis of the water supply pipe.

  As described above, according to the present invention, spray water is sprayed from the center of the spray area toward the periphery, and spray water is sprayed on the entire area of the spray area, so that the spray water can reach the main body before reaching a sufficient flight distance. The inner wall surface of the casing is not contacted, and the spray water sufficiently spreads to cover the channel cross section where the spray means is located, so that the contact efficiency with air is improved. Spraying water is sprayed from the center of the spraying area toward each corner of the flow path cross section of the casing, so that the spraying water and the air are reliably in contact with each other even in the vicinity of the corner.

  In addition, the spray water sprayed from the spray nozzle in the spray means reaches the wire mesh at substantially the same distance, and collides with the wire mesh to make the particles having a large particle size into fine particles, so that the spray water sprayed from the spray nozzle is uniform. Is diffused.

  Further, in the spraying means, spray water is sprayed in a flat and fan-shaped spray pattern from each spray nozzle to different areas of the spray area, and the spray pattern of each spray nozzle is inclined at a predetermined angle with respect to the air flow direction of the processing target air. As a result, the spray water sprayed from each spray nozzle diffuses without interfering with each other, and the spray water spreads sufficiently to improve the contact efficiency with air.

  It is also possible to diffuse the spray water sprayed from each spray nozzle without interfering with each other by forming spray patterns of the respective spray nozzles at different positions in the airflow direction of the processing target air.

  The metal mesh of the spraying means opens toward the air flow direction of the air to be treated and has a mesh shape having a surface along the air flow direction, and supports the mesh net material. Since it consists of a frame attached to the water supply pipe that supplies spray water, it can be installed firmly without much effort, and the air flow resistance is almost even in the central part where the air flow velocity is the fastest and has the greatest effect. There is no spraying means.

  A plurality of spray nozzles are arranged radially around the axis of the water supply pipe arranged along the air flow direction, and the mesh material forms a cylindrical surface concentric with the axis of the water supply pipe, so that the spray tip of each spray nozzle etc. A wire mesh can be easily arranged at a distance.

  Moreover, by attaching a plurality of spray nozzles to one water supply pipe, the nozzle piping is simplified, the dead space where the air cannot pass due to the piping is reduced, and the air resistance is also reduced. Further, since a plurality of spray nozzles are provided in one cylindrical wire mesh, the inside of the cylindrical wire mesh is filled with spray water reflected and diffused by the wire mesh, and the contact efficiency between water and air is almost 100. % Can be increased.

  Hereinafter, embodiments of the present invention will be described with reference to the drawings. 1 to 3, an air washer 1 has a water spray chamber 3 having a predetermined length inside a main casing 2 having a rectangular channel cross section. The water spray chamber 3 is connected to a duct (not shown) at an air inlet 3a formed at one end thereof, and the processing target air A flowing from the duct passes through the flow path of the water spray chamber 3 to the other end. It flows out from the formed air outlet 3b.

  In the water spray chamber 3, a washer medium 4 is arranged at the position of the air outlet 3b. The washer medium 4 has a shape substantially equal to the cross section of the air flow path, and is made of polyvinyl chloride fiber or stainless steel wire. For example, a mat-like one having a thickness of about 25 mm to 50 mm.

  On the upstream side of the washer medium 4, a plurality of spraying means 5 communicating with a circulating water supply system described later is arranged. As shown in FIG. 3, a plurality of spray areas 2a, 2b, 2c, and 2d are set in the flow passage cross section of the main body casing 2, and in this embodiment, four spray areas 2a, 2b, 2c, and 2d are provided. It is set. It is also possible to form a single spray area in the cross section of the flow path of the main casing 2, and as shown in FIG. 9 as another configuration, six spray areas 2 a, 2 b, 2 c, 2 d, 2 e, 2 f are formed. It is also possible to set the number, and the number can be arbitrarily set according to the air volume and the flow passage cross-sectional area of the main body casing 2.

  Spraying means 5 is arranged at the center position of each spraying area 2a, 2b, 2c, 2d, and spraying means 5 has a plurality of spraying nozzles 5a, 5b, 5c, 5d. The four nozzles 5a, 5b, 5c, and 5d are provided, but the number thereof can be set arbitrarily. The spray means 5 sprays spray water from the nozzles 5a, 5b, 5c, 5d from the center to the periphery of the spray areas 2a, 2b, 2c, 2d, and spray water over the entire spray areas 2a, 2b, 2c, 2d. Spray.

  The spraying means 5 has a cylindrical wire mesh 6. As shown in FIGS. 6 to 7, the metal mesh 6 is made of stainless steel, and in this embodiment, a mesh member 6a of 30 mesh is supported by a frame 6b and formed into a cylindrical shape. The wire mesh 6 is fixed to a water supply pipe 7 inserted concentrically inside by a hose band 6c.

  More specifically, the spray means 5 has a water supply pipe 7 for supplying spray water as its core, and includes an arbitrary number of nozzles 5a, 5b, 5c, 5d immediately after the branch pipe branched from the water supply pipe 7, It is desirable to provide them radially from the central axis of the water supply pipe 7. The spraying means 5 is provided with a cylindrical wire mesh 6 in a shape in which a water supply pipe 7 is inserted concentrically at the center of the inside thereof. As shown in FIGS. 6 to 7, the wire mesh 6 is always in contact with water having dynamic pressure, so it is formed of a member having excellent corrosion resistance and high strength, and is made of the above-described stainless steel or resin. The material may be changed between the net 6a and the frame 6b. In the present embodiment, a mesh material 6a having a mesh size of 30 mesh is suitable in terms of performance, but a mesh material between 10 mesh and 100 mesh depending on the combination of the form of the spray nozzle, the spray amount, and the size of the spray area. 6a is used as appropriate.

  In the present embodiment, the frame 6b is made of a square bar or a round bar having strength, and the frame 6b is formed in a cylindrical shape to form a frame, and can be held by a water supply pipe 7 disposed substantially at the center. A net 6a is attached to the cylindrical frame 6b to withstand the spray pressure. In FIG. 6, the net 6a is not attached to both ends of the cylindrical shape.

  The wire mesh 6 is fixed by bringing the frame leg portions at both ends into contact with the water supply pipe 7 and covering the take-out portion of the frame leg portion with the hose band 6c from the outside and tightening. Thus, the metal mesh 6 can be attached to and detached from the water supply pipe 7, and the metal mesh 6 can be installed even after a branch pipe is provided in the water supply pipe 7 and the nozzles 5a, 5b, 5c, and 5d are arranged. Further, the fixing method may be other fastening methods such as fixing to a screw fixed to the water supply pipe 7.

  As described above, the nozzles 5a, 5b, 5c, and 5d are connected to the water supply pipe 7 and disposed inside the wire mesh 6, and the mesh material 6a of the wire mesh 6 is in front of the spraying direction of the nozzles 5a, 5b, 5c, and 5d. The spray water sprayed from the spray nozzles at the nozzles 5a, 5b, 5c, and 5d reaches the mesh member 6a of the wire mesh 6 at substantially equal distance while diffusing.

  The mesh member 6a is arranged at a distance near the portion where the spray water of the adjacent nozzles 5a, 5b, 5c, and 5d overlaps when viewed from the air flow direction, and the flow path cross section is covered with the spray water diffused by the wire mesh 6. It is desirable that

  The wire mesh 6 is not limited to a cylindrical shape, and each nozzle 5a, 5b, 5c, and the like can be used as long as it is possible to ensure that spray water sprayed from the spray port reaches the mesh material 6a at a substantially equal distance while diffusing. It is also possible to form a semicircular shape or other shapes every 5d.

  As shown in FIGS. 4A, 4B, and 5, spray water is sprayed in different directions from the nozzles 5a, 5b, 5c, and 5d of the spray means 5 in the spray areas 2a, 2b, 2c, and 2d. To do. The spray pattern P of spray water sprayed from the nozzles 5a, 5b, 5c, and 5d has a flat fan shape, and the flat surface is inclined at a predetermined angle with respect to the airflow direction of the processing target air A.

  Further, the spray pattern P of the spray water sprayed from each nozzle 5a, 5b, 5c, 5d is formed so that the central axis of the flat surface is orthogonal to the air flow direction of the processing target air A, and the processing target air It is also possible to form them at different positions in the airflow direction of A.

  A water storage tank 8 is provided at the lower part of the water spray chamber 3 to receive the spray water flowing down. A circulating water supply system 9 that circulates and supplies the circulating water staying in the water storage tank 8 to the spraying means 5 includes a suction pipe 10 that opens to the lower part of the water storage tank 8, a circulation pump 11 connected to the suction pipe 10, and a circulation pump. 11 includes a motor 12 that drives 11, a discharge pipe 13 that is connected to the discharge port of the circulation pump 11 and is disposed in the water spray chamber 3, and the water supply pipe 7 that is branched from the discharge pipe 13.

  A cooling chamber 14 having a predetermined length having the same channel cross-sectional shape as the water spray chamber 3 is connected to the downstream side of the water spray chamber 3, and a cooling coil 15 is provided as a cooler inside the cooling chamber 14. It is. A blower (not shown) is disposed downstream of the cooling chamber 14, and air is guided to the flow path of the water spray chamber 3 by operating this blower.

  The operation of the above configuration will be described. The processing target air A flows into the water spray chamber 3 from the air inlet 3a. Spray water is sprayed from the nozzles 5a, 5b, 5c, and 5d of the spray means 5 in this air flow.

  As shown in FIG. 8, the spray water ejected from the nozzles 5 a, 5 b, 5 c, 5 d in the spraying means 5 reaches the net member 6 a of the wire mesh 6 at substantially equal distance, collides with the wire mesh 6, and has a particle size of Larger particles become fine and spray water is uniformly diffused. Here, the spray water whose particle diameter has been reduced by colliding with the wire net 6 may be scattered in a direction different from the direction discharged from the nozzles 5a, 5b, 5c, 5d, but the speed is reduced. Therefore, it does not reach until the spray water interferes. The spray water that collides with the wire mesh 6 is scattered as fine spray water having a low flow rate even in places where the discharge flow from the nozzles 5 a, 5 b, 5 c, 5 d does not include, and also inside the wire mesh 6. Scatter. For example, when the cross section of the air current shown in FIG. 3 is viewed, there is no portion where the spray water is not scattered, and the air current does not contact with the air and does not pass through. Further, since the spray water is sprayed over the entire areas 2a, 2b, 2c and 2d of the spray area, the spray water does not come into contact with the inner wall surface of the main casing 2 before reaching a sufficient flight distance, and the spray water has By effectively utilizing the dynamic pressure, the spray water is sufficiently spread in the spray water area, and the contact efficiency with the air is improved.

  As shown in FIGS. 3 and 9, the spray water is sprayed from the center of the spray areas 2a, 2b, 2c, and 2d toward each corner of the flow passage cross section of the main body casing 2, so that the spray water Make sure that it comes into contact with air.

  Also, as shown in FIG. 4 and FIG. 5, a fan-shaped spray pattern P sprayed from the nozzles 5a, 5b, 5c, and 5d to different directions of the spray areas 2a, 2b, 2c, and 2d in the spray means 5 is processed. By inclining at a predetermined angle with respect to the air flow direction of the target air A, the spray water sprayed from the nozzles 5a, 5b, 5c, and 5d diffuses without interfering with each other, and the spray water sufficiently spreads to the air. Contact efficiency is improved. Spreading the spray water sprayed from each nozzle 5a, 5b, 5c, 5d without interfering with each other makes the spray pattern P of each nozzle 5a, 5b, 5c, 5d different in the airflow direction of the processing target air A. It can also be realized by forming.

  Fine particles of spray water colliding with dust and harmful gas in the air reach the washer media 4, and the washer media 4 captures the spray water accompanied by dust and harmful gas, and further water and air due to the water film effect on the media. In addition, the high saturation efficiency humidification is realized by a synergistic effect with the gas-liquid contact by spraying on the upstream side, so that the dust and toxic gas removal rate is also improved. In the washer media 4, the spray water is washed away from the dust adhering to the washer media 4, and harmful gas is taken in and flows into the water storage tank 8. The air that has passed through the washer medium 4 is led to the cooling chamber 14 from the air outlet 3 b as purified air that has been purified and sufficiently humidified, and is cooled by the cooling coil 15.

  In the embodiment described above, both ends of the cylindrical wire mesh 6 are opposed to the air flow direction of the processing target air A. However, as shown in FIGS. 10 and 11, the flow regulating member 6 d is provided at the upstream end of the wire mesh 6, and the opening of the wire mesh 6 is closed by the flow regulating material 6 d except for the portion for inserting the water supply pipe 7. It is also possible.

  With this configuration, the air flow of the processing target air that flows from the upstream side is distributed to the surroundings by the rectifying material 6 d and does not flow into the wire mesh 6. For this reason, the spray water sprayed from the nozzles 5 a, 5 b, 5 c, and 5 d and the air to be treated do not come into gas-liquid contact in the wire mesh 6. That is, the air to be treated does not come into contact with the sprayed water before being refined by passing through the wire mesh 6, but only comes into contact with the sprayed water that has passed through the wire mesh 6 to become a fine flow, and the flow velocity of the air However, the efficiency of gas-liquid contact between water and air is increased even in the central portion of the spray area.

  As shown in FIG. 12 to FIG. 16, the spray means 5 includes the treatment target air A in addition to the nozzle group of an arbitrary number of nozzles 5 a, 5 b, 5 c, 5 d provided radially around the axis in the water supply pipe 7. It is also possible to provide a separate nozzle group of an arbitrary number of nozzles 5e, 5f, 5g, and 5h at different positions in the air flow direction, that is, in the axial direction of the water supply pipe 7.

  In this case, the nozzles 5a, 5b, 5c and 5d of the nozzle group arranged on the upstream side in the airflow direction and the nozzles 5e, 5f, 5g and 5h of the nozzle group arranged on the downstream side in the airflow direction are connected to the water supply pipe 7. It arrange | positions in a different position around an axial center, the nozzle group of an upstream side sprays spray water to a far region, and the nozzle group of a downstream side sprays spray water to a near region. For this reason, even in the central portion of the spray area where the flow velocity of air is the fastest, the cross section of the flow path including the periphery of the nozzle can be reliably covered with the spray water, and the gas-liquid contact efficiency between water and air is increased.

  As shown in FIG. 14, in the present embodiment, four spray areas 2a, 2b, 2c, and 2d are set in the flow passage cross section of the main body casing 2, but as illustrated in FIG. 17 as another configuration, Six spray areas 2 a, 2 b, 2 c, 2 d, 2 e, and 2 f can be set, and the number thereof can be arbitrarily set according to the air volume and the channel cross-sectional area of the main body casing 2.

Plan sectional drawing which shows the air washer in embodiment of this invention Vertical sectional view showing an air washer in the same embodiment Front view of air washer in the same embodiment (A) The schematic diagram which shows the spray pattern of the spray water in the embodiment, (b) The perspective view of the spray pattern The schematic diagram which shows the spray pattern of the spray water in the same embodiment The perspective view which shows the wire mesh in the embodiment Enlarged view showing a wire mesh in the same embodiment The enlarged view which shows the spraying state in the same embodiment The front view of the air washer in other embodiment of this invention The perspective view which shows the metal-mesh in other embodiment of this invention. Enlarged view showing a wire mesh in the same embodiment The schematic diagram which shows the spray pattern of the spray water in the same embodiment The enlarged view which shows the spraying state in the same embodiment Front view of air washer in the same embodiment Vertical sectional view of the air washer in the same embodiment Plan sectional view of the air washer in the same embodiment Front view of air washer in the same embodiment Plan sectional view showing a conventional air washer Plan sectional view showing another conventional air washer

Explanation of symbols

A Air to be treated P Spray pattern 1 Air washer 2 Body casing 2a, 2b, 2c, 2d, 2e, 2f Spray area 3 Water spray chamber 3a Air inlet 3b Air outlet 4 Washer media 5 Spray means 5a, 5b, 5c, 5d, 5e, 5f, 5g, 5h Spray nozzle 6 Wire net 6a Net 6b Frame 6c Hose band 6d Rectifier 7 Water supply pipe 8 Water tank 9 Circulating water supply system 10 Suction pipe 11 Circulation pump 12 Motor 13 Discharge pipe 14 Cooling chamber 15 Cooling coil

Claims (7)

In an air washer that ventilates the air to be treated in the casing, a spray area is set on the cross section of the flow path of the casing, and spray means for spraying spray water from the center of the spray area toward the periphery is disposed at the center position of the spray area. An air washer characterized in that the spray means sprays spray water over the entire spray area. The air washer according to claim 1, wherein a plurality of spray areas are set in a flow path cross section of the casing, and spray means are disposed at a central position of each spray area. The spray means has a spray nozzle for spraying spray water and a wire mesh disposed in front of the spray nozzle, and the spray water sprayed from the spray nozzle reaches the wire mesh at substantially equal distances. The air washer according to 1 or 2. The spray means has a plurality of spray nozzles, each spray nozzle sprays spray water toward a different direction of the spray area and in a direction orthogonal to the airflow direction of the air to be treated, and sprays from each spray nozzle. The air according to any one of claims 1 to 3, wherein the spray pattern of the spray water has a flat fan shape, and the flat surface is inclined at a predetermined angle with respect to the air flow direction of the processing target air. Washer. The spray means has a plurality of spray nozzles, each spray nozzle sprays spray water toward a different direction of the spray area and in a direction orthogonal to the airflow direction of the air to be treated, and sprays from each spray nozzle. The spray pattern of spray water forms a flat fan shape, and at least the flat surfaces of both adjacent spray patterns are at different positions in the airflow direction of the air to be treated. The air washer according to the item. The metal mesh of the spraying means opens toward the air flow direction of the air to be treated and has a mesh shape having a surface along the air flow direction, and supports the mesh net material. The air washer according to any one of claims 3 to 5, comprising a frame attached to a water supply pipe for supplying spray water. The plurality of spray nozzles are arranged radially around the axis of the water supply pipe arranged along the air flow direction, and the mesh material forms a cylindrical surface concentric with the axis of the water supply pipe. Air washer.

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