JP2013031822A - Air-compression type air cleaner - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide an air-compression type air cleaner superior in maintenance cost regardless of an air amount treated in high efficiency.SOLUTION: The air cleaner includes an air introduction route, a humidifying means arranged in the air introduction route and humidifying air in the air introduction route, an air compressor arranged on the downstream end of the air introduction route, an exhaust route connected to the exhaust port of the air compressor, and a draining means arranged in the exhaust route and draining condensed water generated by compression or cooling of the air. A compression ratio of the air compressor may be 2-25. The air introduction route may have an air heating means for heating sucked air in the upstream of the humidifying means. The exhaust route has a plurality of air/water separation tanks for storing the air exhausted from the air compressor. The plurality of the air/water separation tanks may be connected to the exhaust route in parallel.

Description

  The present invention relates to an air cleaning device, and more particularly to an air cleaning device capable of removing contaminants in the air by dehumidifying humidified air by compression.

  As an environmental measure, an air purifier that converts polluted air containing pollutants discharged in a production process or the like into clean air is used. As this air cleaning device, an air cleaning device has been proposed in which contaminants in the air are captured by water by humidification such as by spraying water, and then the contaminants are removed by dehumidification (Japanese Patent Laid-Open No. 2005-106358). (See publications).

  In such a conventional air purifier, as a dehumidifying means for removing water vapor from humidified air, a method of condensing water vapor with a cooled metal plate, a method of absorbing moisture with a hygroscopic material, a method of separating water molecules with a hollow fiber membrane Etc. are used. However, there is concern about corrosion in the method using a metal plate, the method using a hygroscopic material requires regular regeneration of the hygroscopic material, and the method using the hollow fiber membrane is frequently damaged by the hollow fiber membrane itself. Maintenance is required. Furthermore, since the number of members used as the dehumidifying means is increased or decreased according to the amount of air to be processed, further increase in maintenance cost is inevitable when the amount of processing increases.

JP-A-2005-106358

  The present invention has been made based on the above-described circumstances, and an object of the present invention is to provide an air compression type air purifier that is highly efficient and excellent in maintenance cost regardless of the amount of air to be processed.

The invention made to solve the above problems is
An air introduction path;
A humidifying means disposed in the air introduction path and humidifying the air in the air introduction path;
An air compressor disposed at the downstream end of the air introduction path;
An exhaust path connected to an exhaust port of the air compressor;
And a drainage unit that is disposed in the exhaust path and discharges condensed water generated by compressing or cooling the air.

  The air cleaning device includes an air introduction path, a humidifying unit that is disposed in the air introduction path and humidifies air in the air introduction path, and an air compressor that is disposed at a downstream end of the air introduction path. And the exhaust passage connected to the exhaust port of the air compressor and the drainage means disposed in the exhaust passage for discharging condensed water generated by the compression or cooling of the air. The substance is trapped with water contained in the intake air by humidification, and the air containing this water (water vapor) is compressed by an air compressor, thereby condensing the water vapor trapping the pollutant and condensing condensed water. This condensed water can be discharged out of the system. As a result, the air cleaning device can efficiently remove contaminants from the inhaled air and convert it into clean air.

  In addition, since the air purifier uses less consumable members in the water vapor condensation process (dehumidification process), maintenance costs and labor can be reduced regardless of the amount of air to be processed.

  The compression ratio of the air compressor is preferably 2 or more and 25 or less. When the compression ratio of the air compressor is 2 or more, the air purifier can efficiently perform the air-water separation, and when the compression ratio of the air compressor is 25 or less, the air cleaner The cost of the cleaning device can be reduced.

  It is preferable to have an air heating means for heating the air sucked into the air introduction path upstream of the humidification means. In this way, by having the air heating means for heating the air sucked into the air introduction path upstream of the humidifying means, the air purifier increases the amount of saturated water vapor of the sucked air to generate more water vapor. It can be contained in the intake air. As a result, the air cleaning device can clean the air more effectively.

  The drainage means may include a plurality of steam separation tanks for storing air exhausted from the air compressor, and the plurality of steam separation tanks may be connected in parallel to the exhaust passage. As described above, the drainage means has a plurality of air / water separation tanks for storing air exhausted from the air compressor, and the plurality of air / water separation tanks are connected in parallel to the exhaust path. The air purifier can store and cool the air exhausted from the compressor in these steam separation tanks, and can further remove water vapor contained in the air. Therefore, the air cleaning device can clean air more effectively. Further, the maintenance cost can be reduced regardless of the amount of air to be cleaned.

  It is preferable to have an air cooling means for cooling the air exhausted from the air compressor. By having the air cooling means for cooling the air exhausted from the air compressor in this way, the air cleaning device condenses and removes the water vapor contained in the air exhausted from the air compressor in a short time. Can do. As a result, the air cleaning device can clean the air more efficiently.

  It is good to have an air washing tank which wash | cleans the air exhausted from the said air compressor. By having an air cleaning tank that cleans the air exhausted from the air compressor in this way, the air cleaning device further increases the cleanliness of the air while maintaining the maintenance cost regardless of the amount of air to be processed. Time and effort can be reduced.

  As described above, the air purifying apparatus of the present invention can remove pollutants contained in air with high efficiency by performing dehumidification by compression after humidifying the air, and the amount of air to be processed. Regardless, the maintenance cost can be reduced.

It is typical explanatory drawing of the air purifying apparatus which concerns on one Embodiment of this invention. It is typical explanatory drawing of the air purifying apparatus which concerns on a different form from the air purifying apparatus of FIG.

Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings as appropriate.
The air cleaning device 1 of FIG. 1 includes an air compressor 2, an air introduction path 3, a water spray device 4, a plurality of air / water separation tanks 6, and a plurality of air cleaning tanks 7.

<Air compressor 2>
The air compressor 2 sucks air sprayed with water from the air introduction path 3, compresses the sucked air, and exhausts the air to the air / water separation tank 6.

  The lower limit of the compression ratio of the air compressor 2 is preferably 2, more preferably 3, and particularly preferably 4. On the other hand, the upper limit of the compression ratio of the air compressor 2 is preferably 25, more preferably 20, and particularly preferably 15. If the compression ratio of the air compressor 2 is smaller than the above range, the water vapor contained in the air may not be sufficiently condensed. On the other hand, if the compression ratio of the air compressor 2 is larger than the above range, the air compressor 2 is increased in size, and the pressure resistance of the air / water separation tank 6 and the piping system needs to be designed to be large, which increases the manufacturing cost. There is a fear.

  The compression method of the air compressor 2 is not particularly limited, and for example, a turbo type (axial flow type, centrifugal type), a positive displacement type, or the like can be used. Among these, the turbo type that can increase the processing capacity per unit is particularly preferable. Further, the volume of air sucked per unit time by the air compressor can be appropriately determined in consideration of the space volume of a room where air cleaning is performed and the number of ventilations per unit time.

  The air compressor 2 is preferably an oil-free type. Since the air compressor 2 is an oil-free type, it is possible to prevent the oil that has leaked from the air cleaner from being contained in the compressed air and prevent the air cleanliness from being lowered.

<Air introduction path 3>
The air introduction path 3 is connected to an air suction port of the air compressor 2 and guides air in a room or the like where air cleaning is performed to the air compressor. The air introduction path 3 is provided with a water spray device 4 for spraying water into the air introduction path 3 as a humidifying means.

  The air introduction path 3 has a distance (length) that allows the water sprayed by the water spray device 4 to sufficiently diffuse into the intake air before the intake air reaches the air compressor 2. The intake air containing pollutants is sprayed with water and humidified while passing through the air introduction path 3 and then sucked into the air compressor 2 and compressed. The air introduction path 3 may be a straight pipe or a curved pipe. The cross section of the air introduction path 3 may be rectangular or circular, but a shape with little pressure loss is preferable.

  The air introduction path 3 includes air heating means 3a. As this air heating means 3a, what wound the heat-transfer coil around the inner peripheral surface of the air introduction path | route 3 can be used, for example. The air heating means 3a heats the intake air, and the amount of water vapor (saturated water vapor amount) that the intake air can contain increases. Therefore, when water is sprayed from the water spray device 4, the saturated water vapor amount of the intake air can be increased, and more water can be contained in the intake air. As a result, the contaminant contained in the intake air is easily captured by water (water vapor), and the contaminant removal effect can be enhanced.

<Water spray device 4>
The water spray device 4 is a device that sprays water onto the air sucked into the air introduction path 3. The water spray device 4 includes a water supply tank 4a, a water supply pump 4b, a water spray nozzle 4c, a water supply line 4d, and a residual water discharge line 4e, and the water spray nozzle 4c projects into the air introduction path 3. Arranged.

  The water spraying device 4 sprays water into the air introduction path 3 by sending water in the water supply tank 4a to the water spray nozzle 4c by the water supply pump 4b. As the water supply pump 4b, a general centrifugal pump can be used, and the discharge pressure only needs to be equal to or higher than a pressure at which water can be sprayed into the air introduction path 3, and is preferably 0.1 MPaG or higher, for example. The amount of spray water can be appropriately determined depending on the content of contaminants in the air to be cleaned. For example, the amount of spray water is preferably 50% by weight or more with respect to the amount of intake air. The water spray nozzle 4c is not limited as long as fine water droplets can be sprayed over a wide range, and those having a well-known shape can be used. The spray nozzle 4c may be a fixed type or a rotary type, but a rotary type capable of spraying water over a wider range is preferable. The water spray nozzle 4c is disposed on the downstream side (air compressor 2 side) of the air heating means 3a in the air introduction path 3 so that water can be sprayed onto the heated air. Further, before the intake air reaches the air compressor 2, an upstream side as far as possible from the outlet of the air introduction path 3 (inlet of the air compressor 2) so that the sprayed water is sufficiently diffused into the intake air. It is preferable that the water spray nozzle 4c is disposed at the position.

  Of the water sprayed from the water spray nozzle 4c into the air introduction path 3, the water remaining in the air introduction path 3 without being vaporized and contained in the air is removed by the residual water discharge line 4e. It is discharged outside. This residual water discharge line 4e may be connected to, for example, the water supply tank 4a, and the residual water may be reused as spray water, or discharged outside the system in the same manner as the condensed water discharge line 14 described later. May be.

  The water in the water supply tank 4a sprayed by the water spray device 4 is preferably pure water with a reduced impurity concentration. As this pure water, pure water obtained by a well-known method can be used. Examples of this method include a method using an ion exchange resin, an electric regenerative ion exchange device, a reverse osmosis membrane, and the like. . Moreover, in order to increase the trapping effect of the pollutant by water, fine particles that easily trap the pollutant contained in the air to be cleaned may be appropriately mixed with the pure water.

  As a minimum of the temperature of the water sprayed from the water spraying apparatus 4, 10 degreeC is preferable, for example, 20 degreeC is more preferable, and 30 degreeC is especially preferable. On the other hand, the upper limit of the temperature of water sprayed from the water spray device 4 is preferably 100 ° C, more preferably 95 ° C, and particularly preferably 90 ° C. When the temperature of the water sprayed from the water spray device 4 is less than the above range, the temperature of the intake air is lowered, and the saturated water vapor amount of the intake air is lowered, so that a sufficient amount of water vapor cannot be contained. . Conversely, when the temperature of the water sprayed from the water spray device 4 exceeds the above range, it may be difficult to handle the water. “At the time of spraying” means the time when water is injected into the duct from a nozzle or the like for spraying water.

  A liquid agent supplier 16 is disposed on the downstream side of the water spray nozzle 4 c in the air introduction path 3. The liquid supply unit 16 sprays liquids such as a disinfectant having a sterilizing effect and a neutralizing agent for neutralizing toxic substances on the air in the air introduction path 3. By this liquid agent, bacteria contained in the air to be cleaned can be killed, poisonous substances can be neutralized, and the air cleaning effect of the air cleaning device 1 can be enhanced.

  As the liquid agent, a disinfectant generally used for sterilizing purposes or a neutralizing agent used for neutralizing toxic substances can be selected and used in accordance with the properties of the air to be cleaned. Specific examples of this disinfectant include alcohols and phenols.

<Air-water separation tank 6>
The air / water separation tank 6 is a tank into which air obtained by compressing intake air is sent from the air compressor 2. The plurality of air / water separation tanks 6 are connected in parallel via respective inlet valves downstream of the exhaust line 11. The temperature of the air stored in the steam separation tank 6 gradually decreases due to heat dissipation, and the saturated water vapor amount decreases accordingly. For this reason, the water vapor contained in the compressed air is condensed and aggregated into water droplets, and water is separated at the lower portion of the steam-water separation tank 6. The condensed water stored in the lower part is discharged out of the system by the second condensed water discharge line 14. For example, the drainage storage tank for storing condensed water can be provided downstream of the second condensed water discharge line 14. The condensed water stored in the drainage storage tank is separated into clean water and pollutants by, for example, filtration treatment, and the clean water can be used again for the water spray device 4 and the washing water tank 7 described later. it can.

  The air compressed by the air compressor 2 is injected into one of the plurality of steam separation tanks 6 through the inlet valve 6a. When the pressure of the steam-water separation tank 6 reaches the design pressure by air injection, the inlet valve 6a of the steam-water separation tank 6 is closed, the inlet valve 6a of the other steam-water separation tank 6 is opened, and the air compressor 2 The steam / water separation tank 6 that feeds air from is switched. The steam / water separation tank 6 into which air has been supplied until the internal pressure reaches the design pressure is left as it is until the internal pressure of the other steam / water separation tank 6 reaches the design pressure after the inlet valve 6a is closed. Is done. After the internal pressure of the other steam separation tank 6 reaches the design pressure, the outlet valve 6 b is opened, and the stored air is discharged into the air washing tank 7 by the first air discharge line 12. Thereafter, the inlet valve 6a is opened, and the air exhausted from the compressor 2 is injected again.

  The condensed water staying in the lower part of the steam-water separation tank 6 is appropriately discharged out of the system by the second condensed water discharge line 14. As this discharge method, for example, when the internal pressure of the air / water separation tank 6 becomes about 200 kPaA or less, a method of opening the drain valve 6d and discharging condensed water can be used. Further, as another discharge method, two level switches are provided in the steam / water separation tank 6, and when the water level reaches a certain level, the drain valve 6d is opened to discharge condensed water, and then the certain level is increased. A method using a mechanism that closes the drain valve 6d when the water level drops can be mentioned. The reason why the drain valve 6d is closed when the water level drops to a certain level is to prevent the air in the steam / water separation tank 6 from being discharged from the second condensed water discharge line 14.

  The capacity and number of the steam-water separation tanks 6 can be appropriately determined in consideration of the capacity of air exhausted by the air compressor 2 per unit time. And the condensate are sufficiently separated, and the capacity to store the air that is always exhausted from the air compressor 2 is ensured so that the stored air can be sufficiently discharged from the first air discharge line 12. And number are preferred. The larger the capacity of the steam / water separation tank 6 and the greater the number of steam / water separation tanks 6, the longer the time during which air can stay in the steam / water separation tank 6, thereby increasing the cleanliness of the air. be able to.

  The steam-water separation tank 6 has a design pressure that can withstand the pressure of the air compressed by the air compressor 2. For example, when the compression ratio of the air compressor 2 is 10, the design pressure is about 1 MPaG. Each of the steam / water separation tanks 6 has a relief valve 6c having a set pressure that is slightly higher than the design pressure of the tank. When the pressure of the steam / water separation tank 6 exceeds the tank design pressure and reaches the set pressure of the relief valve 6 c, the relief valve 6 c is opened, and the air is released to the outside of the steam / water separation tank 6 by the air relief line 13. Let it go. This can prevent the steam-water separation tank 6 and the piping from bursting.

  The air / water separation tank 6 may include an air cooling means for cooling the air in the air / water separation tank 6. By cooling the air in the steam-water separation tank 6 with this air cooling means, water vapor can be separated from the air in the steam-water separation tank 6 more efficiently and in a short time. As this air cooling means, for example, a heat exchanger that circulates the refrigerant by arranging piping or the like in the air / water separation tank 6, a fan that air-cools the surface of the air / water separation tank 6, or the air / water separation tank 6 is used. The heat sink (fin) etc. which protrude from the outer side of this can be mentioned.

<Air cleaning tank 7>
The air washing tank 7 is a tank for washing the air released from the steam / water separation tank 6 with water, and a plurality of air washing tanks 7 are arranged in series downstream of the first air discharge line 12 connected to the steam / water separation tank 6. ing. The air cleaning tank 7 is a water tank in which water is stored leaving a part of its volume, and an air inlet is provided at the bottom and an air outlet is provided at the top. Of the plurality of air purification tanks 7 connected in series, the first air discharge line 12 is connected to the air inlet of the air purification tank 7 disposed upstream, and the air purification tank disposed downstream. A second air discharge line 15 is connected to the air discharge port of the tank 7.

  The air discharged from the steam / water separation tank 6 is sent to the air inlet of the air cleaning tank 7 disposed most upstream through the first air discharge line 12, and into the water stored in the air cleaning tank 7. Released. The air released into the water becomes bubbles and floats toward the water surface, is stored in the upper part of the air cleaning tank 7, and is discharged from the air discharge port. The discharged air is sent to the air inlet of the next air cleaning tank 7 and is similarly discharged from the air outlet of the air cleaning tank 7. This process is repeated in all the air cleaning tanks 7 connected in series, and the air discharged from the air cleaning tank 7 disposed at the most downstream side is the second air discharge line connected to the air cleaning tank 7. 15 is opened to the outside sequentially. The opening at the downstream end of the second air discharge line 15 may be the same space as a space such as a room in which the air suction port of the air introduction path 3 is disposed, or may be a separate space.

  The water stored in the air cleaning tank 7 is preferably pure water having a reduced impurity concentration, like the water in the water supply tank 4a sprayed by the water spray device 4 described above. Further, the water stored in the air cleaning tank 7 is repeatedly discharged and supplied by a circulation device (not shown) in order to maintain cleanliness. As this circulation method, a continuous processing system in which a constant amount of water is always discharged and supplied may be used. In each air cleaning tank 7, a switching air cleaning tank 7 connected in parallel is provided, and a fixed time is provided. The air cleaning tank 7 to be used may be switched every time, and at the same time as this switching, a batch processing method may be used in which all the water in the air cleaning tank 7 that has been used is replaced.

  Thus, by passing through the air washing tank 7 storing water, the contaminants and contaminants remaining in the air discharged from the steam separation tank 6 can be dissolved or captured in the water and removed. As a result, the cleanliness of the air processed by the air cleaning device 1 can be further increased. Moreover, since the air discharged | emitted from the steam-water separation tank 6 in the air washing tank 7 is compressed and has a fixed pressure, it can be made to discharge | release into water, without using a pressurization apparatus etc.

  An air filter 17 can be provided in each of the first air discharge line 12 and the second air discharge line 15. The air filter 17 can capture particles that could not be removed by the air / water separation tank 6 and the air washing tank 7. As the air filter 17, a HEPA filter or the like generally used for air cleaning can be used.

<Air cleaning device 1>
The air cleaning device 1 captures the pollutant contained in the inhaled air by the water sprayed by the water spray device 4 and compresses the air containing the sprayed water by the air compressor 2. The water vapor can be easily condensed, and the water vapor can be separated by the air / water separation tank 6 and discharged out of the system. As a result, contaminants can be removed from the intake air and converted into clean air. In addition, by cleaning the air released from the steam / water separation tank 6 by the air cleaning tank 7, the cleanliness of the air can be further increased. Moreover, since the said air purifying apparatus 1 has few consumable members used in the condensing process of water vapor | steam, it can reduce the cost of a maintenance. Further, even if the amount of air processing increases, it can be dealt with by changing the capacity of the air compressor 2, the steam separation tank 6, etc., so that the increase in consumable members can be reduced, and the maintenance cost can be reduced. Can be suppressed.

  Moreover, since the said air cleaning apparatus 1 attracts | sucks the air to clean by the air compressor 2, the internal pressure of the room etc. which implements air cleaning falls. As a result, air in a room or the like where this air cleaning is performed is less likely to leak to the outside, and the release of contaminated air can be prevented.

  The use of the air cleaning apparatus of the present invention is not particularly limited as long as it is an application for cleaning air containing pollutants, but it is used for removing radioactive substances when radioactive leaks occur in a nuclear power plant. It can be particularly preferably used.

<Other embodiments>
The air cleaning device of the present invention is not limited to the above-described embodiment, and may be the following embodiment.

  The air cleaning device 21 in FIG. 2 includes an air compressor 2, an air introduction path 3, a water spray device 4, a condensed water discharge device 5, and an air washing tank 7. The air compressor 2, the air introduction path 3, the water spraying device 4, and the air cleaning tank 7 are the same as the air cleaning device 1 of FIG. However, the compressed air exhausted from the air compressor 2 is directly discharged into the air cleaning tank 7, unlike the air cleaning device 1. Moreover, the air cleaning tank 7 with which the said air purifying apparatus 21 is provided is one unit.

  When the intake air sprayed with water is compressed by the air compressor 2, the condensed water discharge device 5 reduces the amount of saturated water vapor due to the volume reduction of the intake air and condenses the water vapor contained in the intake air. It is a device that drains water. The condensed water discharge device 5 includes a condensed water separator 5 a and a first condensed water discharge line 5 b provided in the exhaust line 11 of the air compressor 2.

  The condensed water separator 5 a is a device that separates condensed water exhausted together with the air compressed from the air compressor 2. As the condensed water separator 5a, for example, a cyclone drain separator or the like can be used.

  The condensed water discharged from the condensed water separator 5a is discharged out of the system by the first condensed water discharge line 5b. For example, a drainage storage tank for storing the condensed water can be provided downstream (on the discharge side) of the first condensed water discharge line 5b.

  The air purifying device 21 has the same function as the air purifying device 1 of FIG. That is, the pollutant contained in the inhaled air is captured by the water sprayed by the water spray device 4, and the air containing the spray water (water vapor) is compressed by the air compressor 2 to capture the pollutant. The condensed water vapor is condensed to generate condensed water, and this condensed water can be discharged out of the system by the condensed water discharging device 5. Further, the air exhausted from the air compressor 2 is cleaned in the air cleaning tank 7 and discharged from the first air release line 12. As a result, the air cleaning device 21 can remove the contaminants from the intake air to obtain clean air. Moreover, in this embodiment, since the steam-water separation tank 6 is not equipped, the installation space of an apparatus can be made small.

  In the present embodiment, the air exhausted from the air compressor 2 can be cooled in the air cleaning tank 7 by lowering the temperature of the water in the air cleaning tank 7. Thereby, the water vapor contained in the air can be further condensed to generate condensed water, which can be stored in the air cleaning tank 7, and the contaminant removal effect of the air cleaning device 21 can be enhanced.

  In each of the above embodiments, the air heating means is provided in the air introduction path. However, embodiments in which this air heating means is not provided are also within the intended scope of the present invention. For example, when the temperature of the air to be sucked is high or when high-temperature water is supplied to the water supply tank, it is not necessary to heat the air. Water vapor can be contained in the intake air. Further, water may be directly sprayed from a pure water supply system such as a factory to a water spray nozzle without spraying a water supply tank or a water supply pump.

  In each of the above embodiments, the water spray device is used as the humidifying means disposed in the air introduction path. However, the humidifying means is not limited to the water spray device. As other humidifying means, for example, a shower device for dropping water droplets from the upper part of the air introduction path, a wet filter device for allowing air to pass through a filter soaked with water, or the like can be used.

  Further, in the air cleaning device 21 of FIG. 2, the condensed water discharge device 5 is provided in the exhaust path of the air compressor 2, but an embodiment in which the condensed water disposing device 5 is not provided is also within the intended scope of the present invention. . For example, the air exhausted from the air compressor 2 may be discharged directly to the air cleaning tank 7. In this case, the condensed water generated by the air compression is mixed and stored with the water in the air cleaning tank 7, and only air is discharged from the first air discharge line 12.

  Further, in the case where the air / water separation tank is provided, the number of the air / water separation tanks is two in the air purification apparatus 1 of FIG. 1, but the number of the air / water separation tanks is not limited. However, three or more air-water separation tanks may be provided.

  Further, the air cleaning device can include a plurality of air compressors. By providing a plurality of air compressors, the amount of air to be cleaned can be increased. Moreover, the site | part provided with an air cooler is not restricted to a steam-water separation tank, It can provide suitably between the discharge port of an air compressor, and the discharge port of air.

  As described above, the air cleaning device of the present invention can remove pollutants contained in the air with high efficiency by humidifying the air and then dehumidifying it by compression, and the amount of air to be processed can be reduced. Nevertheless, maintenance costs can be reduced. Therefore, it can be suitably used as a cleaning device for contaminated air generated in a large-scale production process such as a factory.

DESCRIPTION OF SYMBOLS 1 Air cleaning apparatus 2 Air compressor 3 Air introduction path 3a Air heating means 4 Water spray apparatus 4a Water supply tank 4b Water supply pump 4c Water spray nozzle 4d Water supply line 4e Residual water discharge line 5 Condensate discharge apparatus 5a Condensate separation 5b Condensed water discharge line 6 Air / water separation tank 6a Inlet valve 6b Outlet valve 6c Relief valve 6d Drain valve 7 Air washing tank 11 Exhaust line 12 First air discharge line 13 Air release line 14 Condensate discharge line 15 Second air release Line 16 Liquid supply device 17 Air filter 21 Air purifier

Claims (6)

An air introduction path;
A humidifying means disposed in the air introduction path and humidifying the air in the air introduction path;
An air compressor disposed at the downstream end of the air introduction path;
An exhaust path connected to an exhaust port of the air compressor;
An air purifier comprising: a drainage unit that is disposed in the exhaust path and discharges condensed water generated by compression or cooling of air.   The air cleaning device according to claim 1, wherein the compression ratio of the air compressor is 2 or more and 25 or less.   The air purifier according to claim 1 or 2, further comprising an air heating means for heating air sucked into the air introduction path upstream of the humidifying means.   The said drainage means has a plurality of air-water separation tanks for storing air exhausted from the air compressor, and the plurality of air-water separation tanks are connected in parallel to the exhaust path. The air purifier according to claim 2 or claim 3.   The air purifier according to any one of claims 1 to 4, further comprising an air cooling means for cooling air exhausted from the air compressor.   The air cleaning device according to any one of claims 1 to 5, further comprising an air cleaning tank that cleans air exhausted from the air compressor.

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