WO2017169897A1

WO2017169897A1 - Air purification device

Info

Publication number: WO2017169897A1
Application number: PCT/JP2017/010894
Authority: WO
Inventors: 藤田　雅司; 山中　弘次
Original assignee: オルガノ株式会社
Priority date: 2016-03-29
Filing date: 2017-03-17
Publication date: 2017-10-05
Also published as: CN109069683A; JP6670653B2; TW201736779A; JP2017176334A

Abstract

An air purification device 1 has: an intake port 3 and an exhaust port 4 provided to a housing 2 so that air flows in a horizontal direction through the inside of the housing 2; an air/liquid contact part 5 for bringing air introduced into the housing 2 from the intake port 3 into contact with washing water, the air/liquid contact part 5 being provided between the intake port 3 and the exhaust port 4; and a washing water jetting means 6 for jetting the washing water in planar fashion in a direction upwardly intersecting with a flow direction of air, the washing water jetting means 6 being provided on an upstream side of the air/liquid contact part 5 with respect to the flow direction of air.

Description

Air purification device

The present invention relates to an air purification device.

2. Description of the Related Art Conventionally, air purifiers that remove fine particles or gaseous substances contained in air by bringing cleaning water into contact with air have been used. As such a gas-liquid contact type air purifier, scrubbers used for building air conditioners and external air conditioners, and for dust removal and deodorization of exhaust gas in the manufacture of various products are known. Among them, in particular, a filling scrubber using a filler such as Raschig ring, terralet packing, or a fiber assembly is known.
Filling scrubbers are roughly classified into two types: vertical (vertical) and horizontal (horizontal). The vertical scrubber is a scrubber configured such that air flows vertically from below to the filler, and the horizontal scrubber is configured such that air flows horizontally relative to the filler. It is.

Vertical scrubbers are widely used for industrial purposes, such as dust removal and deodorization of exhaust gas associated with the manufacture of various products. However, because the height of the packed bed is increased and the apparatus is enlarged, it is used for home use, that is, for purifying the outside air introduced into the living space and the air circulating in the living space in a house such as a detached house or an apartment house. It is not preferable. In the vertical scrubber, the flow of cleaning water (downward) and the flow of air (upward) are countercurrent in the filler. For this reason, when the air flow rate is increased, there is a problem that flooding that eventually causes the washing water not to flow downward occurs, and gas-liquid contact is not sufficiently performed. On the other hand, in the horizontal scrubber, the flow of washing water (downward) and the flow of air (laterally) are vertical in the filler. Therefore, there is an advantage that the flows are less likely to interfere and the occurrence of flooding can be suppressed, and the present invention is suitably used for various applications.
In a horizontal scrubber, as a method of supplying cleaning water to the filler, a method of injecting cleaning water from a plurality of nozzles provided in front of the filler (upstream in the air flow direction) or above the filler, respectively. Is known (see, for example, Patent Documents 1 and 2).

JP-A-6-254345 JP 2003-227622 A

As the washing water injection mode, a method of jetting the washing water from each nozzle in a conical shape or a pyramid shape is usually used. In order to exert high removal performance on fine particles, gaseous substances, etc., it is necessary to wet the filler sufficiently, but in the method of spraying cleaning water into a cone or pyramid, the nozzle and gas-liquid contact part It is necessary to secure a sufficient distance in the horizontal direction. As a result, the installation space becomes large, leading to an increase in the size of the apparatus.
SUMMARY OF THE INVENTION An object of the present invention is to provide an air purification apparatus that removes particulates and gaseous substances contained in air with high efficiency while realizing downsizing of the apparatus.

In order to achieve the above-described object, an air purification device according to the present invention includes an intake port and an exhaust port provided in a housing such that air flows in a horizontal direction inside the housing, and an intake port and an exhaust port. A gas-liquid contact part that is provided between the gas inlet and the air-liquid contact part for contacting the air introduced into the housing from the intake port with the cleaning water, and is provided upstream of the gas-liquid contact part with respect to the air flow direction. Cleaning water jetting means for jetting cleaning water in a plane in a direction crossing the flow direction.
In such an air purification device, since the cleaning water is jetted from below onto the gas-liquid contact portion, the horizontal distance necessary to sufficiently wet the gas-liquid contact portion can be shortened. Further, since the cleaning water sprayed in a planar shape makes gas-liquid contact, the contact opportunity between the air to be treated and the cleaning water can be increased, and the gas-liquid contact efficiency can be improved.

As described above, according to the present invention, it is possible to provide an air purification apparatus that removes particulates and gaseous substances contained in air with high efficiency while realizing downsizing of the apparatus.

It is the schematic which shows the structure of the air purification apparatus which concerns on the 1st Embodiment of this invention. It is sectional drawing which shows one structural example of the injection nozzle which concerns on the 1st Embodiment of this invention. It is the schematic which shows the structure of the air purification apparatus which concerns on the 2nd Embodiment of this invention.

Hereinafter, embodiments of the present invention will be described with reference to the drawings.

The air purification device of the present invention can be suitably used for household use, that is, for purifying the outside air introduced into the living space and the air circulating in the living space in a house such as a detached house or a housing complex. In addition, it can also be suitably used for industrial use, for example, exhaust from food, pharmaceutical, chemical product manufacturing factories, pulp and paper factories, food and beverage kitchens, livestock barns, animal experiment facilities, It can be used as an application to treat (purify, remove dust, deodorize, etc.) odors from garbage storage sites and waste disposal sites.

(First embodiment)
FIG. 1 is a schematic diagram showing the configuration of the air purification device according to the first embodiment of the present invention.
The air purification device 1 is configured so that air flows in the horizontal direction inside the housing 2, and includes an intake port 3 and an exhaust port 4 provided on both sides of the housing 2 in the horizontal direction, and an intake port. 3 and a gas-liquid contact portion 5 provided between the exhaust port 4 and

injection nozzles

6 and 7 for injecting cleaning water into the gas-liquid contact portion 5. With such a configuration, the air introduced into the housing 2 from the air inlet 3 and the cleaning water sprayed from the

spray nozzles

6 and 7 come into contact with each other at the gas-liquid contact portion 5 to clean the air. Is possible. Details of the gas-liquid contact portion 5 and the

injection nozzles

6 and 7 will be described later.

In addition, the air purification apparatus 1 includes a circulation tank 8 that stores the wash water, a circulation pump 9 that circulates the wash water by supplying the wash water in the circulation tank 8 to the

injection nozzles

6 and 7, and a circulation tank 8. And an external water source 10 for supplying cleaning water.
The circulation tank 8 is provided in the lower part of the housing | casing 2 so that the flow of air may arise above the water surface. The circulation pump 9 has a primary side (suction side) connected to the circulation tank 8 via a pipe 11 and a secondary side (discharge side) connected to the

injection nozzles

6 and 7 via a pipe 12. Wash water can be circulated. The external water source 10 is connected to the inside of the housing 2 through a pipe 13 and can be replenished with washing water from the external water source 10 by controlling a water supply valve 14 provided in the pipe 13. Further, since the drain valve 15 for draining water is connected to the bottom surface of the circulation tank 8, the cleaning water can be replaced as necessary.

In the illustrated example, the circulation pump 9 is provided outside the housing 2. However, the circulation pump 9 may be provided inside the housing 2 as long as it is configured to circulate cleaning water. Further, the circulation pump 9 may be a submersible pump provided in the circulation tank 8. Further, in the illustrated example, the external water source 10 can clean the gas-liquid contact portion 5 and the eliminator 16 described later with supplementary water (for example, wash away the captured fine particles and gaseous substances). However, it may be connected to the lower part of the housing 2 so that the circulation tank 8 is directly replenished with washing water. On the other hand, the circulation tank 8 and the circulation pump 9 are not necessarily provided, and the cleaning water that has come into contact with air at the gas-liquid contact portion 5 may be drained as it is.
Furthermore, the air purification device 1 includes an eliminator (drip-proof plate) 16 provided between the gas-liquid contact portion 5 and the exhaust port 4, and a blower provided to face the exhaust port 4 outside the housing 2. 17. The eliminator 16 has a function of preventing the spray water from scattering from the spray nozzle 7. The blower 17 only needs to be able to introduce external air from the intake port 3 and discharge the air that has passed through the gas-liquid contact portion 5 from the exhaust port 4. Air may be pushed into the housing 2. The blower 17 may be provided inside the housing 2. Further, a humidity adjusting means such as a desiccant rotor may be provided between the eliminator 16 and the exhaust port 4 in order to remove a large amount of moisture contained in the air purified by the gas-liquid contact method.

Here, the air purification operation using the air purification device 1 will be briefly described. The washing water stored in the circulation tank 8 is supplied to the

injection nozzles

6 and 7 by the circulation pump 9 and is injected to the gas-liquid contact portion 5 by the

injection nozzles

6 and 7. On the other hand, when the blower 17 is activated, the inside of the housing 2 is in a reduced pressure state, and the air to be purified is introduced from the air inlet 3 into the housing 2. The introduced air flows in the horizontal direction inside the housing 2 by the blower 17 and reaches the gas-liquid contact portion 5. The air that has reached the gas-liquid contact portion 5 makes gas-liquid contact with the cleaning water at the gas-liquid contact portion 5, and particulate matter and gaseous chemical substances in the air are removed by the cleaning water. The purified air is discharged from the exhaust port 4 by the blower 17.
Next, details of the gas-liquid contact portion 5 and the

injection nozzles

6 and 7 will be described. FIG. 2 is a cross-sectional view showing a configuration example of the injection nozzle of the present embodiment.

The gas-liquid contact portion 5 is not particularly limited as long as it is a filler that realizes gas-liquid contact between air and washing water, but has a low pressure loss and a high removal performance of fine particles and gaseous substances. In view of achieving compatibility and achieving downsizing in the horizontal direction, it is preferably made of a mat-like fiber assembly.
The raw material of the fibers constituting the fiber assembly may be any material that can be processed into fibers, for example, polyamides such as wholly aromatic polyamide, nylon 6 and nylon 66; polyesters such as polyethylene terephthalate and polybutylene terephthalate; Poly (halogenated olefins) such as vinyl, polyvinylidene chloride, polyvinylidene fluoride, and polytetrafluoroethylene; Nitrile monomers such as polyacrylonitrile and polymethacrylonitrile; Polyvinyl such as polyvinyl acetate, vinyl polypropionate, and polyvinyl alcohol Examples thereof include esters and hydrolysis products thereof; celluloses such as cellulose, acetylcellulose, and rayon; and polyolefins such as polyethylene, polypropylene, and ethylene-vinyl acetate copolymer.

For example, as the fiber assembly described above, Saran Lock (registered trademark) of Asahi Kasei Home Products Corporation can be mentioned. Saran lock is a three-dimensional nonwoven fabric obtained by curling Saran (registered trademark) fiber, which is a highly flame-retardant fiber of the material itself, into a nonwoven fabric by curling it into a spring shape and coating and bonding with Saran latex. Saran lock is suitably used because it has a large space and surface area, low ventilation resistance, excellent filtration efficiency, and a large dust collection capacity. Further, as the above-described fiber aggregate, those having high water repellency are more preferable, and those having a contact angle with water on the surface of the fiber aggregate of 70 ° or more are preferable.
It is preferable that the gas-liquid contact part 5 is disposed so that the lower end thereof is immersed in the cleaning water in the circulation tank 8. Thereby, it is suppressed that the gas-liquid contact part 5 is excessively water-retained (water-sealed) by the jetted cleaning water due to the capillary phenomenon, and an increase in pressure loss can be suppressed.

The

injection nozzles

6 and 7 are respectively provided on the upstream side and the downstream side of the gas-liquid contact portion 5 with respect to the air flow direction (hereinafter also simply referred to as “upstream side” and “downstream side”, respectively). The

injection nozzles

6 and 7 include a front injection nozzle 6 that injects cleaning water onto the upstream surface of the gas-liquid contact portion 5 (hereinafter referred to as “front surface”) and a downstream surface of the gas-liquid contact portion 5 (hereinafter referred to as “front surface”). And a back spray nozzle 7 for spraying cleaning water on the back surface). Each of the

injection nozzles

6 and 7 is connected to, for example, an opening formed in a pipe (not shown) provided along the width direction of the gas-liquid contact portion 5 (the width direction of the air flow path).
Both the front spray nozzle 6 and the back spray nozzle 7 are arranged in the vicinity of the water surface of the circulation tank 8 and are configured to spray the cleaning water in a plane from the lower side to the upper side in a direction intersecting the air flow direction. ing. Here, it should be noted that the “planar shape” includes a curtain shape, a film shape, a sheet shape, a fan shape, and the like. Thereby, compared with the case where cleaning water is sprayed with respect to the gas-liquid contact part 5 from front and back, for example in the shape of a cone or a pyramid, it becomes possible to inject cleaning water over a wide range at a shorter distance. As a result, the horizontal distance between the gas-liquid contact portion 5 and the

spray nozzles

6 and 7 can be shortened, and space saving in the horizontal direction can be realized. Further, separately from the gas-liquid contact portion 5, the cleaning water sprayed in a planar shape from the

spray nozzles

6, 7 comes into contact with the air to be treated, or the spray water flow from below or the air flow accompanying the spray water flow causes the horizontal direction As the air flowing through the air diffuses, the chance of contact between the air to be treated and the cleaning water can be increased, and the gas-liquid contact efficiency can be improved. As a result, high removal performance can be exerted on fine particles and gaseous substances. Note that the use of the

spray nozzles

6 and 7 for spraying the cleaning water in a planar shape from below is also advantageous in that the number of nozzles necessary to wet the gas-liquid contact portion 5 uniformly can be reduced.

In the front spray nozzle 6, the angle formed between the air flow direction and the washing water spray direction is preferably 65 to 90 °, and more preferably 75 to 85 °. Alternatively, the front spray nozzle 6 may be capable of changing the spray direction of the cleaning water according to the flow velocity or flow rate of the air flowing through the housing 2. For example, when the flow rate of air is high, it is possible to inject cleaning water from a vertical direction (upward) to a direction inclined upstream. Thereby, even if the flow velocity of air changes, it becomes possible to wet the gas-liquid contact part 5 appropriately by changing the jet direction of washing water according to it. As a method for measuring the flow velocity of air, a method of calculating from the differential pressure between the inlet pressure (pressure at the intake port 3) and the outlet pressure (pressure at the exhaust port 4) can be used. The air flow rate can be measured by a flow meter.
The

injection nozzles

6 and 7 are only required to be able to inject the cleaning water in a plane in a direction intersecting the air flow direction from below to above with respect to the air flow. It is preferable to have a configuration as shown. That is, the

injection nozzles

6 and 7 are in communication with the pipe, the supply flow path 21 to which the cleaning water is supplied, and the injection flow path 22 in communication with the supply flow path 21 and having a diameter smaller than the diameter of the supply flow path 21. And an inclined guide surface 23 that is provided at a position opposite to the injection opening 22a of the injection flow path 22 and is inclined with respect to the axis L of the injection flow path 22, and is configured to incline guide the cleaning water injected from the injection opening 22a. It is preferable to have an inclined guide surface 23 that jets cleaning water in a planar shape by guiding the surface 23 to the outside. Thereby, the water which is mist-like and has a small particle diameter can be jetted in a planar shape, so that the gas-liquid contact portion 5 can be efficiently wetted. In particular, a fan-type spray nozzle that has a small amount of spray water, can disperse the spray water, and can spray water over a wide range while the spray pressure is small is suitable. As such a fan-shaped spray nozzle, for example, a wide-angle fan-shaped nozzle (YYP series) manufactured by Ikeuchi Co., Ltd. may be mentioned. Only one

injection nozzle

6, 7 may be arranged at the center in the width direction of the gas-liquid contact portion 5 (the width direction of the air flow path), or a plurality of injection nozzles may be arranged along the width direction.

In addition, as a washing water injection means with respect to the gas-liquid contact part 5, it is not limited to what injects washing water with the nozzle connected to the opening part of the above pipes, For example, it was provided in the pipe The cleaning water may be directly jetted from a plurality of slits or holes. Alternatively, a pipe provided with a plurality of slits or holes is installed in the circulation tank 8, and a gas such as air is supplied into the pipe, so that the cleaning water in the circulation tank 8 is supplied with the gas from the plurality of slits or holes. A method of spraying can also be used. Further, the washing water jetting unit may be provided at least on the upstream side of the gas-liquid contact portion 5 and is not necessarily provided on the downstream side. That is, in the case of this embodiment, at least the front injection nozzle 6 may be provided, and the back injection nozzle 7 is not necessarily provided.
The cleaning water used for purifying the air is not particularly limited as long as it is clean water, and tap water, well water, distilled water, pure water, electrolytic water, and the like can be used. In the present embodiment, the front spray nozzle 6 and the back spray nozzle 7 spray the same cleaning water, but it is not always necessary, and different cleaning water may be sprayed. . For example, the front spray nozzle 6 may spray the circulating water in the circulation tank 8, and the back spray nozzle 7 may spray new water (replenishment water) from the external water source 10. The washing water may be jetted at a high temperature, and the back jet nozzle 7 may jet the washing water at a low temperature. Alternatively, the front spray nozzle 6 may spray acidic water, and the back spray nozzle 7 may spray alkaline hypochlorous acid water. In this case, as described above, the wash water after use may be drained as it is, or may be collected, collected, reprocessed and reused.

By the way, as shown in the drawing, the gas-liquid contact portion 5 is preferably inclined forward toward the upstream side with respect to the air flow direction, that is, inclined so that the upper portion is located upstream from the lower portion. Preferably it is. Such a forward tilting arrangement has not only the effect of improving the gas-liquid contact efficiency by increasing the contact opportunity between the air to be treated and the cleaning water in the gas-liquid contact portion 5, but also has the following effect.
Due to the flow of air flowing into the housing 2, a part of the cleaning water sprayed from the front spray nozzle 6 is refined and scattered downstream. Such fine water droplets can not only efficiently wet the gas-liquid contact portion 5 but also come into contact with the air to take in fine particles and gaseous substances contained in the air, and the water droplet diameter and water droplet mass. It can flow down while increasing. Since the gas-liquid contact part 5 is inclined forward to the upstream side, a constant space is formed between the cleaning water sprayed from the front spray nozzle 6 and the gas-liquid contact part 5, and as a result, a fine space is formed. The area where the converted water droplets are scattered increases. In addition to this, since the gas-liquid contact part 5 is inclined forward, the flow rate of the washing water is slowed down in the gas-liquid contact part 5, the flow direction is dispersed by the filler, and there is no bias. A water retention state is realized. Thereby, the contact opportunity of to-be-processed air and washing water increases, and it becomes possible to improve a particulate removal rate and a gaseous substance removal rate.

The fact that the gas-liquid contact part 5 is inclined forward is that the ejection distance of the front spray nozzle 6 that is indispensable as washing water spraying means for the gas-liquid contact part 5 (for example, the front of the gas-liquid contact part 5 from the nozzle tip) It is also advantageous in that the distance to the upper end can be shortened. That is, by shortening the injection distance, it can be made less susceptible to the influence of air flow, and the injection pressure can be reduced. However, if the gas-liquid contact portion 5 is excessively inclined, it is not preferable from the viewpoint of miniaturization in the horizontal direction. Therefore, the inclination angle of the gas-liquid contact portion 5 (angle between the front surface and the horizontal surface) is preferably 60 to 85 °.
When the gas-liquid contact part 5 is inclined forward to the upstream side, it is preferable that the gas-liquid contact part 5 is in line contact with the inner upper surface of the housing 2. It is preferable to form a space between them. Specifically, as illustrated, the upper end of the back surface of the gas-liquid contact portion 5 and the inner upper surface of the housing 2 are in line contact, and the upper surface of the gas-liquid contact portion 5 and the inner upper surface of the housing 2 are in between. It is preferable that an open space is formed on the upstream side. By forming such a space, the cleaning water is easily held on the upper part of the gas-liquid contact portion 5 when the cleaning water is jetted from the front injection nozzle 6 toward the gas-liquid contact portion 5. As a result, it is possible to suppress the occurrence of a region with little moisture near the upper portion of the gas-liquid contact portion 5 due to the influence of gravity, thereby reducing the possibility of affecting gas-liquid contact or inducing drift. Can do. Further, since the cleaning water stays in the above-described space, it is possible to suppress a short path in which air passes through the gas-liquid contact portion 5 without contacting the cleaning liquid.

In the illustrated example, the gas-liquid contact portion 5 is a member having a rectangular cross section. For example, when the cross section has another geometric shape, if the upstream surface is inclined forward, the same as described above. An effect can be obtained. That is, it is preferable that the gas-liquid contact part 5 has an inclined surface that is inclined so that the upper part is located upstream of the lower part on the upstream side.
In addition, in the front surface of the gas-liquid contact part 5, a water film is formed by the wash water sprayed continuously, and fine bubbles may be continuously generated by embracing the air flowing through the water film. However, the gas-liquid contact efficiency can be improved by the generation of such fine bubbles. From such a viewpoint, the contact angle of the cleaning water with respect to the front surface of the gas-liquid contact portion 5 is preferably 5 to 30 °, and more preferably 10 to 20 °. Further, the contact angle of the cleaning water with respect to the back surface of the gas-liquid contact portion 5 is preferably 5 to 30 °. Thereby, generation | occurrence | production of the above-mentioned fine bubble can be accelerated | stimulated, and gas-liquid contact efficiency can be improved further.

Among the cleaning water sprayed from the front spray nozzle 6, as described above, there are some which are refined by the flow of air and scattered downstream, but for example, contact with the gas-liquid contact portion 5 to form water droplets on the upstream side Some are scattered. Such a phenomenon is particularly prominent near the inner upper surface of the housing 2. In the present embodiment, in order to effectively use the water droplets scattered on the upstream side for the gas-liquid contact, the air purifying device 1 is the water protruding downward from the inner upper surface of the housing 2 on the upstream side of the front injection nozzle 6. It is preferable to have a return portion 18 and a fiber sheet 19 that hangs down from the tip of the water return portion 18 to the vicinity of the water surface of the circulation tank 8. With such a configuration, the water droplets scattered on the upstream side are returned to the lower side by the water return unit 18 or captured by the fiber sheet 19 to be used for gas-liquid contact with the air to be treated. Can do.

(Second Embodiment)
FIG. 3 is a schematic view showing another configuration example of the air purification device of the present embodiment. Hereinafter, with respect to the same configuration as that of the first embodiment, the same reference numerals (in some cases, subscript symbols) are attached to the drawings, and the description thereof is omitted, and only the configuration different from that of the first embodiment will be described. In FIG. 3, for the sake of simplicity, some components are not shown.
The air purification apparatus 1 of the present embodiment includes a plurality (four in the illustrated example) of gas-liquid contact portions 5a to 5d and a plurality of pairs (four in the illustrated example) of the injection nozzles 6a to 6d, 7a to 7d, which are accommodated in a plurality (two in the illustrated example) of the

casings

2a and 2b. Specifically, one gas-liquid contact portion 5a and a pair of

jet nozzles

6a and 7a are accommodated in the first housing 2a, and the three gas-liquid contact portions 5b to 5d are accommodated in the second housing 2b. And three pairs of injection nozzles 6b to 6d and 7b to 7d.

In the two

casings

2a and 2b, the exhaust port 4a of the first casing 2a and the intake port 3b of the second casing 2b are connected in series by a pipe or the like, and are discharged from the first casing 2a. The air is introduced into the second housing 2b. In addition, the three gas-liquid contact portions 5b to 5d accommodated in the second casing 2b are arranged in a line along the air flow direction. Thereby, in the air purification apparatus 1 of this embodiment, the multi stage process (serial process) of to-be-processed air is attained, and the removal performance of a particulate matter or a gaseous substance can further be improved. In addition, depending on the type of air to be treated, the degree of contamination (concentration and particle diameter of pollutants contained in the air), temperature, humidity, vapor pressure, air volume, wind speed and pressure, the gas-liquid contact parts 5a to 5d It is also possible to more effectively remove fine particles and gaseous substances by changing the configuration (for example, the specific surface area of the fibers constituting the fiber assembly) or changing the type of washing water to be injected. It becomes possible.
One circulation pump for circulating the cleaning water may be provided for each of the

casings

2a and 2b, or may be provided only for the second casing 2b. Further, the second casing 2b may be provided with a plurality of circulation pumps, for example, to circulate cleaning water for each of the gas-liquid contact portions 5b to 5d. Furthermore, the circulation tank 8b of the second housing 2b is divided into a plurality of small tanks by partitioning a plate-shaped member, a slit-containing plate material, a filter, a semipermeable membrane or the like according to the number of gas-liquid contact portions 5b to 5d. It may be divided. In that case, for example, a step may be provided between the small tanks so that the washing water flows with a height difference from the downstream side to the upstream side. When using a filter as a partition, the hole diameter of each filter may become small gradually as it goes downstream.

In the present embodiment, the plurality of gas-liquid contact portions 5a to 5d are arranged in a line along the air flow path, but the gas-liquid contact parts are arranged in a line in a direction intersecting the air flow path. Also good. Thereby, parallel processing of air to be processed is possible, and it is possible to cope with an increase in the processing air volume. Alternatively, in order to improve both the removal performance and the processing air volume, the gas-liquid contact portions may be two-dimensionally stacked in two directions in a horizontal plane, or three-dimensionally stacked in the vertical direction. May be arranged. In addition, when the gas-liquid contact part is arrange | positioned two-dimensionally or three-dimensionally, the flow of air does not need to be one direction, and it may flow in the housing | casing.
Next, the present invention will be described in more detail with reference to specific examples.

Example 1
In this example, the methanol removal rate (change in the concentration of methanol gas) by the air purification process was measured using the air purification apparatus of the first embodiment. In addition, the water purifier and the fiber sheet are not provided in the air purifier used in the present Example.
As the casing, a housing that forms an internal space with a width of 170 mm, a height of 300 mm, and a depth of 350 mm is used. As the gas-liquid contact portion, the thickness is 20 mm, the width is 170 mm, the fiber fineness is 75 denier, and the specific surface area is An 890 m ² / m ³ Saran lock (product number: CS-120) was used, and the angle between the front surface and the horizontal plane was 90 °. As an eliminator, Saran lock (product number: CS-120) having a fiber fineness of 75 denier, a thickness of 20 mm, a width of 170 mm, and a specific surface area of 890 m ² / m ³ was used.

A wide-angle fan-shaped nozzle (model number: 1/8 MYP030PVC) manufactured by Ikeuchi Co., Ltd. was used as the spray nozzle, and one nozzle was arranged at the center in the width direction of the housing. The direction of spraying the washing water from the spray nozzle was set vertically upward and the spray flow rate was 3 L / min.
As the air to be treated flowing into the gas-liquid contact portion, methanol gas whose gas concentration was adjusted to 400 ppm by an impinger was used, and the treatment air flow rate was 36 m ³ / h. The methanol removal rate was calculated from the methanol concentration of the air to be treated and the methanol concentration of the purified air by the detection tubes provided on the upstream side of the intake port and the downstream side of the exhaust port, respectively. The differential pressure was measured as a pressure difference between the upstream side of the intake port and the downstream side of the exhaust port using a differential pressure gauge.

(Example 2)
The methanol removal rate was measured under the same conditions as in Example 1 except that the angle between the front surface of the fiber assembly and the horizontal plane was 80 °.

(Comparative Example 1)
Methanol is used under the same conditions as in Example 1 except that a full cone nozzle (model number: 1/8 MINJJX030PP (FEPM) + PPS) manufactured by Ikeuchi Co., Ltd. is used as the injection nozzle and is arranged in front and rear of the gas-liquid contact portion. The removal rate was measured.

(Comparative Example 2)
The methanol removal rate was measured under the same conditions as in Comparative Example 1 except that the angle between the front surface of the fiber assembly and the horizontal plane was 80 °.
Table 1 shows the results of methanol removal rate and differential pressure in Example 1, Example 2, Comparative Example 1, and Comparative Example 2.

In Example 1 and Example 2, compared to Comparative Example 1 and Comparative Example 2, it was confirmed that good results were obtained in both methanol removal rate and differential pressure. This is due to the difference in the jet form of the wash water, and is considered to be the effect of jetting the wash water from the bottom to the gas-liquid contact portion from below. On the other hand, when Example 1 and Example 2 are compared, Example 2 is better in terms of the methanol removal rate. This is because the gas-liquid contact portion is inclined forward with respect to the air flow direction. This is considered to be the effect.

DESCRIPTION OF SYMBOLS 1 Air purification apparatus 2 Housing | casing 3 Intake port 4

Exhaust port

5,5a-5d Gas-

liquid contact part

6,6a-6d Front injection nozzle (washing water injection means)
7, 7a-7d Back spray nozzle (other cleaning water spray means)
DESCRIPTION OF SYMBOLS 8 Circulation tank 9 Circulation pump 10 External water source 11-13 Pipe 14 Water supply valve 15 Drain valve 16 Eliminator 17 Blower 18 Water return part 19 Fiber sheet 21 Supply flow path 22 Injection flow path 22a Injection opening 23 Inclination guide surface

Claims

An intake port and an exhaust port provided in the housing so that air flows horizontally in the housing;
A gas-liquid contact portion that is provided between the intake port and the exhaust port, and that makes air introduced into the housing from the intake port come into contact with cleaning water;
Wash water injection means that is provided on the upstream side of the gas-liquid contact portion with respect to the air flow direction, and that jets the wash water in a plane that intersects the flow direction from below to above,
An air purifying device.
The air purification device according to claim 1, wherein the gas-liquid contact portion has an inclined surface that is inclined such that an upper portion is located upstream of the lower portion in the flow direction.
Other cleaning water jetting means is provided on the downstream side of the gas-liquid contact portion with respect to the flow direction, and jets the wash water in a direction crossing the flow direction from below to above. The air purification apparatus according to claim 1 or 2.
The air purifier according to claim 3, wherein the cleaning water spraying unit and the other cleaning water spraying unit spray different types of the cleaning water.
The air purification device according to any one of claims 1 to 4, wherein the washing water jetting unit is capable of changing a jetting direction of the washing water according to a flow rate or a flow rate of air flowing through the housing.
The air purification device according to any one of claims 1 to 5, further comprising a water return portion that protrudes downward from an inner upper surface of the housing on the upstream side of the washing water injection unit with respect to the flow direction.
The air purification apparatus according to claim 6, further comprising a fiber sheet hanging from the tip of the water return portion.
The air according to any one of claims 1 to 7, wherein the cleaning water injection unit includes a pipe having an opening and a nozzle that is connected to the opening and injects the cleaning water into a fan shape. Purification equipment.
The nozzle communicates with the pipe, a supply channel that communicates with the supply channel, an injection channel that has a diameter smaller than the diameter of the supply channel, and a position facing the injection opening of the injection channel An inclined guide surface that is inclined with respect to the axis of the injection flow path and guides the wash water ejected from the injection opening to the outside along the inclined guide surface, thereby The air purification device according to claim 8, further comprising an inclined guide surface that is jetted in a planar shape.
The air purification device according to any one of claims 1 to 9, wherein the plurality of gas-liquid contact portions are stacked along at least one of a horizontal direction and a vertical direction.