JP3495130B2 - Underground air deodorizer - Google Patents

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an air deodorizing device for an underground space for deodorizing and removing a bad odor in an underground space such as a tunnel, a basement, an underground mall.

[0002]

2. Description of the Related Art Underground spaces are prone to the growth of microorganisms and odors are easily generated under the condition that the temperature is small and the humidity is often wet. In addition, since the underground space is highly airtight, it has a bad condition that it has a bad odor. Therefore, various types of deodorization of underground space air have heretofore been proposed, and it is said that the use of an electric dust collector and a wet dust collector is practical for deodorizing this kind of underground space air.

Since the deodorization efficiency is low when the above-mentioned electric dust collector or wet dust collector is used, a method of ozone deodorization has recently been proposed. As one field of this ozone deodorization, ozone is dissolved ozone water and air in the underground space. The method of deodorizing by contacting with gas and liquid is drawing attention as a highly efficient deodorizing method.

[0004]

However, the use of the above-mentioned electric dust collector or wet dust collector has a problem that the deodorizing efficiency is low, as described above.

Further, the ozone deodorization method has a relatively high deodorizing efficiency due to the strong oxidizing power of ozone, but in the main constituent gases (ammonia, hydrogen sulfide, methyl mercaptan, methyl sulfide, methyl disulfide) which have a bad odor, ammonia and Odor substances such as hydrogen sulfide are difficult to oxidize with ozone, and the device is too large to reliably oxidize and deodorize them, and the amount of ozone used also increases, so satisfactory deodorization has not been achieved. have.

In the above ozone deodorizing method, a discharge type ozonizer is used to obtain gas-phase ozone and the ozone-containing gas is brought into air-air contact with the air in the underground space. The use of a large amount of gas-phase ozone in the space has a problem that there is a danger due to ozone leakage in the unlikely event, and the use of ozone water has recently attracted attention in order to avoid this danger. The results of the experiment show that the deodorization efficiency of malodorous substances such as methyl mercaptan and methyl disulfide is slightly improved by the method of gas-liquid contact between ozone water and air in the underground space compared with the use of gas-phase ozone. Hydrogen sulfide and methyl sulfide had a problem that deodorization with ozone was not effective.

It is possible to collect ammonia, hydrogen sulfide, methyl sulfide, etc. in the sprayed ozone water by spraying a large amount of ozone water and bringing them into gas-liquid contact with sufficient frequency. It cannot solve the problem of increasing the number.

Although not mentioned above, as a conventional method, activated carbon is used as a malodorous substance (gas) such as ammonia or hydrogen sulfide.
A deodorizing method of adsorbing is also known. However, this activated carbon adsorption method has a problem that activated carbon immediately breaks through (a phenomenon in which it is adsorbed in a saturated state and cannot be adsorbed any more).

Therefore, the present invention has been made to solve the above-mentioned problems, and uses ozone water having high safety and relatively high deodorizing efficiency, and further adsorbs a malodorous substance which is not easily oxidized by ozone water on activated carbon. The purpose of the present invention is to provide a deodorizing device for the air in the underground space, which is capable of oxidatively deodorizing over time, and washing the oxidized activated carbon adsorbing and oxidizing substances with ozone water to secure the adsorbing ability of activated carbon for a long time. .

[0010]

[0011]

[0012]

In order to solve the above-mentioned problems, the structure of the present invention, which has the above-mentioned claims as its gist, has been made to meet the above-mentioned objects. The ozone water spray nozzles 20, 20, 20 ... for spraying ozone water having a concentration of 5 ppm or more are housed in a treatment tank 10 having an outlet 12 at the other end, and one surface of the solid electrolyte membrane 41 is provided. An anode electrode 42 made of a metal having an ozone generating catalytic function and made of a porous material having a predetermined opening ratio is overlaid, and a cathode electrode 43 made of a porous material having a predetermined opening ratio is also placed on the other surface. Anode-side jacket 44 and cathode-side jacket 4 covering the cathode electrode 43 and the cathode electrode 43, respectively.
5 are water pressure inlets 44a and 45a and a water outlet 4 respectively.
4b and 45b are provided, and the anode electrode 42 and the cathode electrode 4 are provided.
3 is connected to a DC power supply 46 to provide a water electrolysis type ozone water producing device 40.
Of the anode jacket 44 is connected to the ozone water spray nozzles 20, 20, 20 ... And the ozone water spray nozzles 20, 20, 20 ... Of the treatment tank 10 are connected.
The water drop / mist filter 30 that collects water droplets and mists that accompany the air flow and has a large particle size is housed in the downstream side portion of the processing tank 10 and is provided in the downstream side portion of the mist filter 30 of the processing tank 10. Is a technical means for accommodating the activated carbon filter 50.

[0013]

[0014]

Further, according to the present invention, ozone is sprayed with ozone water having a concentration of 5 ppm or more in a treatment tank 10 having an air inlet 11 of an underground space containing a foul odor at one end and an outlet 12 at the other end. The water spray nozzles 20, 20, 20, ... Are housed, and the anode electrode 42 made of a porous material made of a metal having an ozone generating catalytic function is laminated on one surface of the solid electrolyte membrane 41, and the other surface is formed on the other surface. Similarly, a cathode electrode 43 made of a porous material having a predetermined aperture ratio is superposed, and an anode side jacket 44 and a cathode side jacket 45 which cover the anode electrode 42 and the cathode electrode 43, respectively, are provided with hydraulic feed ports 44a and 45a, respectively. And a water outlet 44b, 45b are provided, and a water electrolysis type ozone water production apparatus 40 in which the anode electrode 42 and the cathode electrode 43 are connected to a DC power source 46 is provided, and the anode of the water electrolysis type ozone water production apparatus 40 is provided. The The water outlet 44b of the socket 44,
The ozone water spray nozzles 20, 20, 20 ... Connected to the ozone water spray nozzles 20, 20,
In the downstream side portion of 20 ..., a water droplet / mist filter 30 that collects water droplets and mist having a large particle size among the water droplets and mist that accompany the airflow is housed, and the downstream of the mist filter 30 of the processing tank 10 In the side portion, a porous molded activated carbon filter 50a formed by shaping activated carbon into a shape having a large number of through holes parallel to one direction of a honeycomb shape is housed, or in the downstream side portion of the mist filter 30 of the treatment tank 10. The vertical partition plates 13, 13, 13 ...
Each of the divided airflow passages R is divided into R, R ... and an activated carbon filter unit 50b in which activated carbon particles 52, 52, 52 ... It is a technical measure.

[0016]

Therefore, according to the present invention, the air in the underground space containing a foul odor passes through an ozone water spray field of a concentration of 5 ppm or more and comes into gas-liquid contact, so that methyl mercaptan or disulfide mixed in the foul odor is mixed. The odor source substance such as methyl is instantly decomposed, becomes easily water-soluble, and dissolves in the injected ozone water to be collected. It should be noted that even if the ozone water is less than 5 ppm, some deodorizing function is recognized, but when 5 ppm or more of the ozone water is used, the reaction with the malodorous substance as described above is instantaneously performed.

Next, a malodorous substance such as ammonia or hydrogen sulfide, which is relatively difficult to be oxidized by ozone, dissolves in atomized ozone water first because hydrogen sulfide is relatively easy to dissolve in water, and adheres to the activated carbon filter in a mist state. Then, at the activated carbon filter portion, hydrogen sulfide reacts with ozone to generate sulfuric acid (sulfuric acid is generated even before the activated carbon is attached). Ammonia, which is relatively insoluble in water, has a function of reacting with sulfuric acid to become ammonium sulfate, dissolved in water, and collected by the presence of this sulfuric acid.

Methyl sulfide reacts slowly with ozone, but is relatively soluble in water (see "Table 2" below), and gradually changes to methyl disulfide with an ozone ozone catalyst.

That is, the reaction of the odorous substance is carried out in the ozone water spray field and the activated carbon filter site as shown in "Table 1" below.

[0020]

[Table 1]

In the present invention, the anode electrode 42 made of a metal having an ozone generating catalytic function as a porous material having a predetermined aperture ratio is superposed on one surface of the solid electrolyte membrane 41, and the other surface is also provided with the predetermined aperture ratio. The cathode electrode 43 made of a porous material is superposed, and the anode side jacket 44 and the cathode side jacket 45 covering the anode electrode 42 and the cathode electrode 43, respectively, are provided with hydraulic pressure inlets 44a, 45a and water outlets 44b, 45b, respectively. Is provided, and a water electrolysis type ozone water producing apparatus 40 in which the anode electrode 42 and the cathode electrode 43 are connected to a DC power source 46 is provided, and a water outlet 44b of an anode jacket 44 of the water electrolysis type ozone water producing apparatus 40 is provided. The ozone water spray nozzle 2
Since it is connected to 0, 20, 20, ..., To obtain ozone water, compared to the conventional method of generating ozone in the gas phase once to dissolve ozone in water, the discharge ozonizer is simpler and more compact. Ozone water can be obtained with the device. Furthermore, since the raw material of ozone water is water, it does not require oxygen or dry air unlike the conventional discharge method, and can easily obtain ozone water. It is a thing.

The water electrolysis type ozone water producing apparatus 40 is used.
When water is supplied to the anode-side jacket 44 and the cathode-side jacket 45 and a DC voltage is applied between the anode electrode 42 and the cathode electrode 43, the solid electrolyte membrane is formed between the anode electrode 42 and the cathode electrode 43. Electrons move through 41, and as a result, water is electrolyzed, oxygen is generated in the anode-side jacket 44, and hydrogen is generated in the cathode-side jacket 45.
Then, in the anode side jacket 44, the anode electrode 42 acts as a kind of catalyst to make a part of the generated oxygen into ozone, or directly generate ozone to generate ozone together with oxygen. The generated ozone dissolves in water about 10 times as much as oxygen, so the anode side jacket 44
It is dissolved in water flowing through the inside to generate ozone water (water in which ozone is melted is called ozone water).

The generated hydrogen is mixed into the water in the anode side jacket 44 in the form of fine bubbles to produce water containing hydrogen bubbles.

[0024]

[0025]

Further, according to the present invention, since the water electrolysis type ozone water producing apparatus 40 is used, ozone water can be easily obtained, and
Since the activated carbon filter 50 uses the porous molded activated carbon filter 50a or the activated carbon filter unit 50b with a small pressure loss, the activated carbon filter 50 has the effect of being wettable with ozone water.

[0027]

Embodiments of the present invention will now be described with reference to the accompanying drawings. First, according to the method of the present invention, the air in the underground space containing a foul odor is passed through an ozone water spray field having a concentration of 5 ppm or more and brought into gas-liquid contact.

For the gas-liquid contact, a conventionally known wet scrubber for spraying ozone water in a treatment tank through which air in the underground space containing a foul odor flows may be used, but the spray water is oxidized with ozone water. Since the force is strong, it is of course possible to use a corrosion-resistant material for the part in contact with ozone water. The ozone water concentration should be 5
The reason why the concentration is set to be equal to or higher than ppm is that the oxidation reaction is slow and impractical if the concentration is lower than that, and it is desirable to use ozone water of 8 ppm or higher. The ozone water was used at room temperature, and 10 ppm was used in this example.

Next, the air containing the ozone water mist in gas-liquid contact is passed through the activated carbon filter.

When the activated carbon filter is connected to the latter stage of the wet scrubber and is used for deodorizing air, it is common sense to prevent the mist accompanying the air flow from entering the activated carbon filter. That is, it is necessary that the activated carbon be in a dry state in order to adsorb the odorous gas, and the adsorption force of wet activated carbon is extremely reduced.

However, in the present invention, the air containing the ozone water mist which is brought into gas-liquid contact is introduced into the activated carbon filter. Therefore, the activated carbon filter can no longer be expected to adsorb the odorous gas with the adsorption capacity of the activated carbon itself, and in the present invention, ammonia which was not decomposed by ozone and further did not dissolve in the spray liquid was used as described in the action section. It was made to react with the generated sulfuric acid to collect it as ammonium sulfate (ammonium sulfate).

Next, an embodiment of the device of the present invention will be described.
In the figure, 10 is a treatment tank, and this treatment tank 10 has an inlet 11 for air in the underground space containing a foul odor at one end and an outlet 1 at the other end.
It is provided with 2. Further, airflow passages 14a and 14b each having a tip opening into an underground space such as a tunnel are provided at the inlet 11 and the outlet 12, respectively.
A blower 14 is interposed in the middle of 4a, 14b so that air in the underground space such as a tunnel flows through the treatment tank 10 by the blower 14 and returns to the underground space such as a tunnel. . In addition, in the illustrated example, the airflow is configured to rise and flow through the processing tank 10, but it may be configured to flow in the opposite direction, that is, the airflow is lowered and flow through the processing tank 10. Furthermore, unlike the example shown in the processing tank 10,
It goes without saying that the airflow may be made to be horizontal so that it flows horizontally.

An ozone water spray nozzle 2 for spraying ozone water having a concentration of 5 ppm or more into the treatment tank 10
0, 20, 20 ... are stored.

Therefore, this ozone water spray nozzle 2
The water droplets sprayed from 0, 20, 20 ... come into contact with the air in the underground space such as a tunnel, and dust and the like mixed in the air in the underground space are collected in the spray droplets and purified. It is the same as the conventional wet scrubber in that the generated air is returned to the underground space. The treatment tank 10 may be installed in the underground space, or may be installed in a place (including the ground) that is partitioned from the underground space.

The conventional wet scrubber is widely used as a large-capacity air purifying device, and it has been confirmed that dust and the like are efficiently collected. However, when deodorizing is aimed, a very large amount of spray water is used. Must be used and is considered impractical. However, in the present invention, since ozone water is sprayed, among these odorous substances that have come into contact with the droplets, as described above, methyl mercaptan and methyl disulfide are easily oxidized by the strong oxidizing power of ozone and easily dissolved in water. As a result, the droplets are changed into a property of being easily collected (sulfuric acid as shown in Table 1) and are efficiently collected.

In the figure, reference numeral 40 is a water electrolysis type ozone water producing apparatus, and this water electrolysis type ozone water producing apparatus 40 has a predetermined aperture ratio of a metal having an ozone generating catalytic function on one surface of the solid electrolyte membrane 41. The anode electrode 42 made of a porous material is overlaid, and the cathode electrode 43 made of a porous material also having a predetermined aperture ratio is overlaid on the other surface.
Anode-side jacket 44 and cathode-side jacket 45, which respectively cover and, are provided with water pressure inlet / outlet ports 44a, 45a and water outlets 44b, 45b, respectively, and connect the anode electrode 42 and the cathode electrode 43 to a DC power source 46. The water outlet 4 of the anode jacket 44 of the water electrolysis type ozone water producing apparatus 40.
4b to the ozone water spray nozzles 20, 20, 20 ...
・ Connected to.

As the solid electrolyte membrane 41, a fluorine ion exchange membrane having ozone resistance is used. Further, as a metal having an ozone generating catalytic function, lead dioxide (Pb
O ₂ ) is known as a typical example thereof, but it is relatively difficult to process lead dioxide into a porous material having a predetermined opening ratio, and conventionally, a porous material having minute through holes is formed by a firing method or the like. Although it has been proposed, this porous lead dioxide is fragile and its constituent members may collapse during use. Therefore, in this embodiment, platinum (Pt), which is also known to have an ozone generating catalyst function for the anode electrode 2, is known. It was used. In addition, as a metal having an ozone generating catalytic function, gold (A
Noble metals such as u) are known and these may be used.

In order to form the anode electrode 42 as a porous material having an aperture ratio, in this embodiment, platinum wire is woven to form a wire mesh and the mesh is formed as an opening. It is also possible to use those provided with a small through hole or slit.

The cathode electrode 43 may be made of any material, but it has been confirmed by experiments that platinum, gold, silver (Ag), iridium (Ir), etc. are effective for ozone generation. I used a silver wire mesh.

Then, the above-mentioned anode electrode 42 and cathode electrode 43
Anode-side jacket 44 and cathode-side jacket 45 that cover
And the water pressure inlets 44a and 45a and the water outlet 44, respectively.
b and 45b are provided.

The anode-side jacket 44 and the cathode-side jacket 45 are both formed in a split container shape, and the solid electrolyte membrane 41 and the anode electrode 4 are formed when the openings of both are matched.
2 and the cathode electrode 43 are sandwiched in the center. The anode-side jacket 44 and the cathode-side jacket 45 are made of an ozone-water resistant material such as Teflon, and when the openings of both are aligned and fastened with a fastening screw or the like not shown, the hydraulic pressure inlets 44a and 45a are formed. Water outlet 44
b, 45b except that the central portion is partitioned by the solid electrolyte membrane 41, and the water flowing from the hydraulic pressure inlet 44a of the anode side jacket 44 flows out from the water outlet 44ba of the anode side jacket 44. The water flowing in through the water inlet 45a of the cathode-side jacket 45 flows out through the water outlet 45b of the cathode-side jacket 45.

Then, the above-mentioned anode electrode 42 and cathode electrode 43
Are connected to a DC voltage power source 46, and the hydraulic pressure inlet 44
The water supply pipes 48a and 48b are connected to a and 45a, and the water outlet 44a of the anode-side jacket 44 is provided with the ozone water spray nozzle 20 provided in the treatment tank 10 through which the air in the underground space such as the tunnel flows. It is connected to 20, 20, ...

As the DC voltage power supply 46, a conventionally known one that rectifies a commercial power supply to a required DC voltage can be used. In this embodiment, the operation is performed under the specification that a maximum current of about 40 V flows, which is suitable for this specification. It is sufficient to use one with a large capacity.

The water supply pipes 48a and 48b may have their upstream ends connected to a tap water supply source so that tap water can be supplied, but an example in which ground water can be used in a tunnel When using groundwater, the water supply pipes 48a, 48b are extended from a water tank (not shown) for storing groundwater, and the pump 4 is provided in the middle of the water supply pipes 48a, 48a.
It suffices to insert 7,47. Needless to say, a filter 48c should be provided in the middle of the water supply pipe 48a.

The water pressure inflow port 45a and the water outflow port 45b of the cathode side jacket 45 are connected by a water tank 15 and a water supply passage 48b for circulation in which a pump 47 is interposed, to connect the water tank 15 with the water tank 15. Cathode electrode 43 by circulating pure water in
It is designed so that calcium, etc. does not adhere to and accumulate on.

Then, when water is supplied to the anode side jacket 44 and the cathode side jacket 45 and a direct current voltage is applied between the anode electrode 42 and the cathode electrode 43, a water voltage is applied between the anode electrode 42 and the cathode electrode 43. Electrons move through the solid electrolyte membrane 41, as a result, water is electrolyzed, oxygen (O ₂ ) is generated in the anode side jacket 44, and hydrogen (H ₂ ) is generated in the cathode side jacket 45. To do. Then, in the anode-side jacket 44, the anode electrode 42 acts as a kind of catalyst to ozonize a part of generated oxygen to generate ozone (O ₃ ) together with oxygen. Since the generated ozone dissolves in water about 10 times as much as oxygen, the water flowing in the anode-side jacket 44 is ozone water (H ₂ O.
O ₂ ). The cathode side jacket 45
Hydrogen is mixed into the water flowing through as fine bubbles.

In the illustrated embodiment, lath nets 49 are closely packed in the anode side jacket 44 and the cathode side jacket 45 so as to overlap the anode electrode 42 or the cathode electrode 43. This lath net 49 is formed by staggering a large number of slits in a corrosion-resistant metal plate (titanium plate in the embodiment) so that each slit part becomes a mesh, and "a" shown in FIG. 3 is the highest. At the upper part of the stepped portion, there is a low stepped portion or an inclined surface portion b which becomes lower toward the upper side.
The mesh line parts c, c extending obliquely upward are connected to the uppermost step part a.

The lath net 49 is connected to the anode side jacket 44.
The reason for housing in the inside and the cathode side jacket 45 is to improve the contact frequency of generated ozone and water, and to immediately take in oxygen, ozone, and hydrogen generated by electrolysis into water, and to improve conductivity between both electrodes. This is to prevent the decrease of

The wire net and lath net 49 which compose the anode electrode 42 and the cathode electrode 3 as described above have water permeability due to the mesh in the direction orthogonal to the plane, and also have water permeability in the plane direction. That is, when both sides of the lath net body 49 are sandwiched between two plates and water is pumped between them, both sides of the lath net body 49 have irregularities, so that water flows into the next mesh from a portion having a gap between both plates. As a result, water permeability is secured in the surface direction as well. Since the water flow in this plane direction changes direction while colliding with the intersections and mesh lines of the net in order, it travels through a very complicated labyrinth-like flow path. It will be passed by repeating.
Therefore, when the water passes through a complicated labyrinthine flow path, the flow-through distance is lengthened and a stirring action is obtained to improve the gas-liquid contact frequency.

Further, the water flowing through the lath net 49 in the surface direction collides and changes its direction as described above, and a large number of small eddies are generated. That is, an arrow Y is added to "Fig. 4".
The flow dived through the mesh line portion c shown by 1 is a vortex Y2
Becomes Then, this vortex Y2 sweeps oxygen and ozone, which are generated between the anode electrode 2 and the solid electrolyte membrane 41 and are in the form of bubbles, from that portion. Since the bubbles are electrically poor conductors, if the bubbles are present between the anode electrode 42 and the solid electrolyte membrane 41, it becomes difficult for current to flow, and as a result, active electrolysis is not performed. If this bubble is swept by the vortex Y2 immediately after the generation, the current value does not decrease and efficient electrolysis can be performed.

Then, in the downstream portion of the ozone water spray nozzles 20, 20, 20, ... Of the processing tank 10, water droplets and mist that accompany the air flow and have a large particle diameter are collected. -The mist filter 30 is stored.

In the illustrated example, the water drop / mist filter 30 has corrugated cross-section plates arranged in parallel at appropriate intervals. You can use one. It should be noted that when the frequency of collision of the air flow is increased, most of the mist is also collected. However, when the frequency of collision is low, water droplets and mists with a large particle size are collected, but a mistake with a small particle size is detected. Most of them pass through and are accompanied by the air flow.

An activated carbon filter 50 is housed in the portion of the processing tank 10 downstream of the mist filter 30.

When activated carbon is wetted as in the present invention and an air stream is passed therethrough, pressure loss becomes large. Therefore, it is desirable to use activated carbon having a large particle size (particle size of 1 to several millimeters). .

Instead of the activated carbon having a large particle size, the activated carbon filter 50a as shown in FIG. 5 is formed by shaping the activated carbon into a shape having a large number of through holes parallel to one direction like a honeycomb. Even if the activated carbon filter 50 is used, the pressure loss can be reduced. That is,
Since this porous molded activated carbon filter 50a secures the airflow through its own through hole, its air permeability does not deteriorate so much even when it is wet. The seed porous molded activated carbon filter 50a may be a commercially available one, and the through holes can be formed to have a small diameter of 1 mm or less. Therefore, even if the through holes are arranged parallel to the direction of the air flow, the air flow is sufficiently contacted. However, the axial direction of the through hole may be slightly intersected with the air flow direction. Furthermore, the porous activated carbon filter 50a crushed into a few centimeters square is put in a breathable container such as a wire mesh. You may use what was done.

The porous molded activated carbon filter 50a is also used.
Instead of using the above, the inside of the downstream side portion of the mist filter 30 of the processing tank 10 is divided into a plurality of divided airflow passages R, R, R ... In the airflow passage R, an activated carbon filter unit 50b configured by obliquely arranging an activated carbon filter unit 50b containing activated carbon particles 52, 52, 52 ... In a breathable container 51 as shown in FIG. Even if 50 is stored, the pressure loss can be reduced. In this case also, it is necessary to use activated carbon particles 52, water tanks 1552, 52, ... Which have relatively large diameters, and the activated carbon particles 5 are placed in the air-permeable container 51 such as a wire mesh.
By slanting the activated carbon filter unit 50b accommodating 2, 52, 52, ..., a large air flow passage total area of the activated carbon filter 50 can be secured, and a decrease in ventilation due to wetting is compensated for by the expansion of the air flow passage area. I am doing so.

[0057]

As described above, according to the present invention, since the air in the underground space containing a foul odor and ozone water are brought into gas-liquid contact, a part of the odor component is immediately ozone-oxidized, and the odor component which is difficult to be ozone-oxidized. It is possible to provide a deodorizing device for the air in the underground space capable of efficiently deodorizing by reacting over time with the activated carbon filter 50 to deodorize.

The data in the concrete examples are shown in the table
2 ”. In this embodiment, the cross section 1 of the treatment tank 10
00 cm square, air velocity of 1.5 m / Sec, ozone water concentration
It was 4 liters / minute at 10 ppm. In addition, "Table 2"
The unit of is ppm.

[0059]

[Table 2]

Further, in the present invention, since the water electrolysis type ozone water producing apparatus 40 is used, ozone water is highly safe and can be easily obtained, and the electrolysis with the solid electrolyte membrane 41 interposed is 10 times.
It is possible to provide a deodorizing device for the air in an underground space that does not easily cause an electrical short-circuit accident even when used in an underground space such as a damp tunnel, in which a low voltage of approximately 30 V is sufficient and a DC voltage power supply 46 is also small. is there.

In particular, according to the present invention, the obtained ozone is immediately dissolved in water to form a liquid phase, so that it is easy to handle, there is no leakage of ozone gas, and even if it leaks, the ozone water is very safe. Therefore, it is possible to provide a deodorizing device for the air in the underground space that has an extremely small effect on people in the underground space as compared with the case of handling ozone in the gas phase.

[0062]

[Brief description of drawings]

FIG. 1 is a vertical sectional view showing an embodiment of the device of the present invention.

FIG. 2 is a vertical cross-sectional view of an ozone water production unit used in the present invention.

FIG. 3 is a plan view of a lath net used in the present invention.

FIG. 4 is a partially enlarged cross-sectional view of an ozone water production unit used in the present invention.

FIG. 5 is a partially enlarged perspective view of a porous molded activated carbon filter used in the present invention.

FIG. 6 is a sectional view of an activated carbon filter unit used in the present invention.

[Explanation of symbols]

10 treatment tanks 13 Vertical partition plate 20 Ozone water injection nozzle 30 mist filter 40 Water electrolysis type ozone water production equipment 41 Solid electrolyte membrane 42 Anode electrode 43 Cathode electrode 44 Anode side jacket 45 Cathode side jacket 44a Water pressure inlet 44b Water pressure inlet 45a water outlet 45b water outlet 46 DC voltage power supply 48a Water supply pipe 48b Water supply pipe 50 activated carbon filter 50a Porous molded activated carbon filter 50b Activated carbon filter unit 51 breathable container 52 Activated carbon particles R split air flow passage

Continuation of front page (51) Int.Cl. ⁷ Identification code FI B01D 53/74 B01D 53/34 116A 53/81 (56) References JP-A-1-293118 (JP, A) JP-A-2-261515 ( JP, A 62-293035 (JP, A) JP 4-300616 (JP, A) JP 6-246127 (JP, A) JP 4-108511 (JP, A) Flat 1-170429 (JP, U) Actual flat 4-22020 (JP, U) (58) Fields surveyed (Int.Cl. ⁷ , DB name) F24F ^7/ 04-7/06

Claims (2)

(57) [Claims] 1. A treatment tank (1) having an air inlet (11) for an underground space containing a foul odor at one end and an outlet (12) at the other end.
0) contains an ozone water spray nozzle (20, 20, 20 ...) Spraying ozone water having a concentration of 5 ppm or more, and a metal having an ozone generating catalytic function is provided on one surface of the solid electrolyte membrane (41). The anode electrode (42) made of a porous material having a predetermined aperture ratio is superposed, and the cathode electrode (43) made of a porous material having a predetermined aperture ratio is also superposed on the other surface. The anode side jacket (44) and the cathode side jacket (45) respectively covering the electrodes (43) are respectively provided with a hydraulic pressure inlet (44a, 45a) and a water outlet (44b, 4).
5b), the anode electrode (42) and the cathode electrode (4)
3) is provided with a water electrolysis type ozone water producing device (40) which is connected to a DC power source (46), and the water outlet (44b) of the anode jacket (44) of the water electrolysis type ozone water producing device (40). Is connected to the ozone water spray nozzles (20, 20, 20 ...), and the ozone water spray nozzles (20, 2) of the processing tank (10) are connected.
(0, 20 ...) In the downstream side portion, a water droplet / mist filter (30) for collecting water droplets and mist having a large particle size together with the airflow is housed, and the treatment tank (10) The deodorizing device for the air in the underground space, which houses the activated carbon filter 50 in the downstream side portion of the mist filter (30). 2. A treatment tank (10) having an air inlet (11) for an underground space containing a malodor at one end and an outlet 12 at the other end.
An ozone water spray nozzle (20, 20, 20 ...) Spraying ozone water having a concentration of 5 ppm or more is housed therein, and a metal having an ozone generating catalytic function is provided on one surface of the solid electrolyte membrane (41). An anode electrode (42) made of a porous material having an aperture ratio is overlaid, and a cathode electrode (43) also made of a porous material having a predetermined aperture ratio is overlaid on the other surface, and the anode electrode (42) and the cathode electrode ( 43) and the anode side jacket (44) and the cathode side jacket (45) respectively covering the hydraulic pressure inlet (44a, 45a) and the water outlet (44b, 4).
5b), the anode electrode (42) and the cathode electrode (4)
3) is provided with a water electrolysis type ozone water producing device (40) which is connected to a DC power source (46), and the water outlet (44b) of the anode jacket (44) of the water electrolysis type ozone water producing device (40). Is connected to the ozone water spray nozzles (20, 20, 20 ...), and the ozone water spray nozzles (20, 2) of the processing tank (10) are connected.
(0, 20 ...) In the downstream side portion, a water droplet / mist filter (30) for collecting water droplets and mist having a large particle size together with the airflow is housed, and the treatment tank (10) ) In the downstream side portion of the mist filter (30), a porous molded activated carbon filter (50a) in which activated carbon is shaped into a shape having a large number of through holes parallel to one direction of a honeycomb-shaped cross section is stored or treated. A vertical partition plate (13, 1) is provided in the downstream side portion of the mist filter 30 of the tank (10).
3, 13 ...) and a plurality of divided air flow passages (R, R, R.
.), And an activated carbon filter unit (50b) in which activated carbon particles (52, 52, 52 ...) Are housed in a breathable container (51) is obliquely installed in each divided airflow passage R. Deodorizing device for the air in the underground space.