JP2004036999A - Contaminated air purification device and contaminated air purification method - Google Patents

Abstract

A contaminated air purifying apparatus and a contaminated air purifying method that do not discharge contaminated air to the ground and the ground are provided.
The semi-enclosed space includes an air purification tank connected to a semi-enclosed space via an intake duct and an air supply duct, and a fresh water tank for supplying fresh water into the air purification tank. The contaminated air is stored in the air purification tank 10 through the intake duct 21, the contaminated air is purified by contact with the clean water, and the purified air is returned to the semi-enclosed space 2 through the air supply duct 25. And
[Selection diagram] Fig. 1

Description

[0001]
TECHNICAL FIELD OF THE INVENTION
The present invention relates to a contaminated air purifying apparatus and a contaminated air purifying method in a semi-enclosed space such as an underground structure such as an underground tunnel for an automobile.
[0002]
[Prior art]
For example, the following method is known as a means for ventilating contaminated air contaminated by exhaust gas or the like generated in an underground tunnel for an automobile or a method for purifying a contaminant component.
An exhaust shaft and an intake shaft are constructed near the underground tunnel, and the contaminated air in the underground tunnel is sucked into the exhaust shaft and exhausted to the ground. At the same time, fresh air (outside air) is sucked from the intake shaft. There is known a method of replacing the inside of a tunnel.
In addition, a method is known in which contaminated air in an underground road tunnel is sucked and the contaminant is adsorbed to surrounding soil by forcibly transmitting the air into the ground around the tunnel.
[0003]
[Problems to be solved by the invention]
The conventional method for purifying contaminated air in an underground tunnel has the following problems.
<B> In the purification method using the exhaust shaft and the intake shaft, the exhaust gas causes air pollution.
<B> In the case of a deep underground, a shaft having a large diameter and a long overall length for ventilation for performing exhaust and intake is required.
Along with this, a site for building a shaft for ventilation on the ground is required.
<C> Furthermore, the exhaust port must be made into a high-rise chimney shape in order to suppress the influence on the atmosphere near the living environment, which has a serious adverse effect on city landscape and urban planning.
<D> In the purification method in which the contaminated air is forcibly transmitted through the surrounding ground, the surrounding soil is contaminated by the pollutant.
<E> In the case of a deep underground, the permeation distance of the contaminated air to the ground is long, and forced permeation is impossible.
Therefore, in order to shorten the transmission distance, equipment such as a structural space for underground ventilation is separately required, which is uneconomical.
<F> An unpaved open area is necessary so that the air forced to permeate the ground can be discharged.
<G> When the soil in the surrounding ground is clogged by pollutants, the adsorption capacity of the pollutants is reduced. Maintenance for this is constantly required, and maintenance costs are required.
[0004]
[Object of the invention]
The present invention has been made to solve the above-mentioned conventional problems, and an object of the present invention is to provide a polluted air purifying apparatus and a polluted air purifying method that do not discharge polluted air to the ground and the ground.
Another object of the present invention is to provide a polluted air purification device and a polluted air purification method that do not require an exhaust shaft.
Still another object of the present invention is to provide a polluted air purifying apparatus and a polluted air purifying method that do not require a wide area on the ground or a high-rise chimney.
The present invention achieves at least one of these objects.
[0005]
[Means for Solving the Problems]
In order to achieve the above object, a contaminated air purification device of the present invention includes an air purification tank connected to a semi-enclosed space via an intake duct and an air supply duct, and a fresh water tank for supplying fresh water into the air purification tank. And containing contaminated air in the air purification tank from the semi-enclosed space via an intake duct, contacting the contaminated air with fresh water for purification, and purifying the purified air to the semi-enclosed space via the air supply duct. It is characterized by being returned.
Here, the “semi-enclosed space” includes, for example, underground structures such as tunnels and structures constructed on the ground, and has a space having an opening like a tunnel and a door like a building. Includes almost closed space.
[0006]
Further, the contaminated air purification device of the present invention includes a sewage treatment tank for treating fresh water used for purification of the contaminated air, and using the treated water treated in the sewage treatment tank as the fresh water in the air purification tank. It is a feature.
[0007]
Moreover, the contaminated air purification device of the present invention is characterized by including an outside air introduction duct for mixing outside air into the air purified in the air purification tank.
[0008]
In the method for purifying contaminated air of the present invention, contaminated air in a semi-enclosed space is sucked into an air purifying tank of any of the above-mentioned contaminated air purifying devices via an intake duct, and fresh water in a fresh water tank is supplied into the air purifying tank. The contaminated air is supplied and purified by bringing the contaminated air into contact with fresh water, and the purified air is returned to the underground space via an air supply duct.
[0009]
Further, in the method for purifying contaminated air of the present invention, the contaminated air in the semi-enclosed space is purified by bringing the contaminated air into contact with fresh water in the contaminated air purifying tank of the contaminated air purifying apparatus, and the outside air introduced from the outside air introduction duct is mixed into the purified air. Then, it is returned to a semi-enclosed space.
[0010]
Embodiment 1 of the present invention
Hereinafter, an embodiment of the present invention will be described with reference to FIG.
[0011]
<A> Contaminated air purification device An example in which the contaminated air purification device 1 of the present invention is applied to an underground road tunnel which is an example of a semi-enclosed space will be described.
As shown in FIG. 1, the contaminated air purification device 1 is located near an underground road tunnel, and includes an air purification tank 10, a fresh water tank 11, a sewage tank 12, a fresh water supply pipe 13, and a sewage discharge pipe 14. Constitute.
The contaminated air purification device 1 accommodates a system for ventilating the underground road tunnel 2 and the like in an underground space, and does not discharge contaminated air to the atmosphere or the external environment such as the surrounding ground. Do not hang.
In this example, an example of the contaminated air purification device 1 including the outside air introduction duct 15 for allowing outside air to be mixed into the purified air will be described. However, the purified air always has a high oxygen concentration. In such a case, the outside air introduction duct 15 can be omitted.
Hereinafter, main parts of the contaminated air purification device 1 will be described.
[0012]
<B> Air Purification Tank The air purification tank 10 is a purification tank for purifying contaminated air such as exhaust gas generated in the underground tunnel 2.
The air purifying tank 10 stores contaminated air in the underground road tunnel 2 and supplies fresh water there. By bringing the clean water into contact with the contaminated air in the air purification tank 10, the contaminants contained in the contaminated air, such as dust, fine substances, nitrogen oxide (NOx), sulfur oxide (SOx), carbon oxide (COx), etc., are cleaned. Adsorb, melt and take in.
As a method for contacting contaminated air with fresh water (adsorption and melting of contaminants by fresh water), a known method capable of contacting contaminated air with fresh water, such as a method using water spray, a method using violence, or a method using a screen or filter, is used. Since it is possible, the structure inside the air purification tank 10 may be a structure necessary for implementing these means.
The supply of the contaminated air to the air purification tank 10 is performed from the intake duct 21 of the underground tunnel 2 through the contaminated air supply pipe 22.
The supply of fresh water to the air purification tank 10 is performed via a fresh water supply pipe 13 from a fresh water tank 11 described later.
The purified air purified in the air purification tank 10 is returned to the air supply duct 23 via the purified air return pipe 24.
In addition, the sewage generated by the purification of the contaminated air, in which the contaminants are adsorbed and melted in the fresh water, is discharged to a sewage tank 12 described below via a sewage discharge pipe 14.
[0013]
<C> Fresh water tank The fresh water tank 11 is a tank for temporarily storing purified water for purification supplied to the air purification tank 10 described above.
The fresh water in the fresh water tank 11 is supplied to the above-described air purification tank 10 via the fresh water supply pipe 13.
The supply of fresh water into the fresh water tank 11 is performed through a fresh water / sewage transport pipe 27 from a water supply pipe 26 in a common groove 25 of the underground tunnel 2.
The fresh water supplied into the fresh water tank 11 may be pure fresh water, or may be treated water obtained by treating sewage described later in a sewage treatment plant. That is, the treated water can be used as fresh water in the dirty air purification tank 10.
[0014]
<D> Sewage tank The sewage tank 12 is a tank for temporarily storing the sewage discharged from the air purification tank 10 described above.
The sewage in the sewage tank 12 is sent from the air purification tank 10 through a sewage discharge pipe 14, and the sewage collected in the sewage tank 12 is sent through a freshwater / sewage transfer pipe 27 into a common groove 25 of the underground road tunnel 2. To the drain pipe 28 of
The discharged sewage is sent to a known sewage treatment facility via a drain pipe 28 in the common groove 25 for treatment.
[0015]
<E> Outside air introduction duct The outside air introduction duct 15 is an outside air intake unit for mixing outside air into the purified air when the oxygen concentration contained in the purified air purified in the air purification tank 10 decreases. The outside air introduction duct 15 has an atmospheric suction facility 16 on the ground.
The outside air introduction duct 15 has a diameter enough to introduce outside air into the contaminated air purification device 1, has an opening above the ground portion sufficient for introduction of outside air, and allows fresh air to be removed from the air purification tank 10 by an air suction device 16. Can be supplied to
The outside air introduction duct 15 and the air suction facility 16 can be installed on a very small site, and can be installed in an existing or newly-built building according to the cityscape and city planning.
It is also possible to arrange a photovoltaic power generation device composed of a solar cell on the ground portion of the outside air introduction duct 15 to secure a power source for the contaminated air purification device 1 and the like.
[0016]
Hereinafter, a method for purifying contaminated air by the contaminated air purifying apparatus 1 of the present invention will be described with reference to FIG.
The flows of the contaminated air, the purified air, and the outside air are described with broken lines, and the flows of fresh water and sewage are described with solid arrows.
[0017]
<A> Intake of contaminated air Contaminated air such as exhaust gas discharged from vehicles passing through the underground tunnel 2 is taken into the air purification tank 10 of the contaminated air purification device 1 installed near the underground tunnel 2. I do.
The intake of the contaminated air into the air purification tank 10 is performed from the intake duct 21 through the contaminated air supply pipe 22.
[0018]
<B> Supply of fresh water Fresh water is supplied into the air purification tank 10 that has taken in contaminated air.
The fresh water is pumped from the fresh water tank 11 by a known means and supplied into the air purification tank 10.
The fresh water can be supplied from the water supply pipe 26 in the common groove 25 of the underground road tunnel 2 to the fresh water tank 11 via the fresh water / sewage transport pipe 27 and stored.
In addition, the power supply for power used in the air purification tank 10 and the like can be supplied to the contaminated air purification device 1 through the fresh water / sewage conveyance pipe 27 in the same manner as the fresh water.
[0019]
<C> Adsorption of contaminants by fresh water and fresh water supplied into the molten air purification tank 10 come into contact with the contaminated air.
The fresh water in contact with the contaminated air adsorbs and melts dust, fine substances, nitrogen oxide (NOx), sulfur oxide (SOx), carbon oxide (COx), etc., which are pollutants contained in the contaminated air, and removes them. .
Thereby, purified purified air and sewage containing pollutants are generated in the air purification tank 10.
[0020]
<D> The purified air in the air purification tank 10 that has been purified by returning the purified air and contacting the collected wastewater with the fresh water is returned to the air supply duct 23 of the underground road tunnel 2 via the purified air return pipe 24.
Through the above process, the contaminated air in the underground road tunnel 2 can be ventilated to the purified air.
The sewage generated in the air purification tank 10 is discharged to the sewage tank 12 via the sewage discharge pipe 14. Then, the sewage in the sewage tank 12 is sent to a drainage pipe 28 arranged in a common groove 25 of the underground road tunnel 2 via a freshwater / sewage transfer pipe 27, from which the sewage is sent to a sewage treatment facility for processing. In addition, the sewage can be directly sent to the drain pipe 28 in the common groove 25 of the underground road tunnel 2.
Then, the treated water treated in the sewage treatment facility is supplied to the fresh water tank 11 of the contaminated air purification device 1 and can be reused as fresh water supplied to the air purification tank 10.
Further, the sewage may be concentrated by a known concentration method such as a method using a reverse osmosis membrane, a method using a neutralization treatment, and a method using a filter before draining to the sewage tank 12. The fresh water obtained in this concentration process is sent to the fresh water tank 11 for use in the air purification tank 10 again. The concentrated sewage is sent to the drain pipe 28 of the underground road tunnel 2, from which it is sent to a sewage treatment facility for treatment.
[0021]
<E> Mixing of purified air and outside air When the oxygen concentration of the purified air purified in the air purification tank 10 decreases, fresh air is taken in through the outside air introduction duct 15 by the atmospheric suction device 16 and mixed with the purified air. Thus, a sufficient oxygen concentration can be obtained.
That is, outside air (fresh air) is mixed with the purified air in the air purification tank 10 and returned to the air supply duct 23 of the underground tunnel 2 via the purified air return pipe 24.
It is also possible to arrange a photovoltaic power generation device composed of a solar cell on the ground portion of the outside air introduction duct 15 to secure a power source for the contaminated air purification device 1 and the like.
[0022]
Embodiment 2 of the present invention
In the first embodiment of the present invention, an example in which an air purification tank 10, a fresh water tank 11, and a sewage tank 12 are configured as main parts as the contaminated air purification device 1 is described.
On the other hand, a sewage treatment tank (not shown) for treating the sewage in the sewage tank 12 in the contaminated air purification device 1 can be provided.
Thereby, the sewage generated in the air purification tank 10 is stored in the sewage tank 12, supplied from the sewage tank 12 to a sewage treatment tank (not shown), and the sewage is processed to generate treated water.
In addition, the treated water generated from the sewage treatment tank (not shown) can be stored in the fresh water tank 11 and supplied to the air purification tank 10 in the same manner as the fresh water to be used for purifying the contaminated air.
[0023]
【The invention's effect】
The contaminated air purifying apparatus and the contaminated air purifying method of the present invention are as described above, so that the following effects can be obtained.
<B> It is possible to purify the contaminated air and ventilate the semi-enclosed space without releasing the contaminated air to the ground. Further, since the contaminated air can be purified without forcibly transmitting the contaminated air into the surrounding ground, there is no contamination of the surrounding soil.
As a result, it is possible to prevent air pollution and surrounding ground pollution by the contaminated air.
<B> No polluted air is discharged to the ground, so no exhaust shaft is required.
That is, there is no need for extensive land and high-rise chimneys required for ventilation on the ground.
For this reason, there is no adverse effect on the cityscape and city planning caused by the construction of the shaft.
[Brief description of the drawings]
FIG. 1 is an explanatory view of a contaminated air purifying apparatus of the present invention. FIG. 2 is an explanatory view of a contaminated air purifying method using a contaminated air purifying apparatus.
DESCRIPTION OF SYMBOLS 1 ... Contaminated air purification apparatus 10 ... Air purification tank 11 ... Fresh water tank 12 ... Sewage tank 2 ... Underground tunnel

Claims (5)

An air purification tank connected to the semi-enclosed space via an intake duct and an air supply duct,
A fresh water tank for supplying fresh water into the air purification tank;
Contaminated air is accommodated in an air purification tank from the semi-enclosed space via an intake duct, and the contaminated air is purified by contacting the contaminated air with fresh water, and the purified air is returned to the semi-enclosed space via an air supply duct. And
Contaminated air purification device. The polluted air purification device according to claim 1,
A contaminated air purification device, comprising: a sewage treatment tank for treating fresh water used for purifying the contaminated air, wherein treated water treated in the sewage treatment tank is used as the fresh water in the air purification tank. The polluted air purification device according to claim 1 or 2, further comprising an outside air introduction duct for mixing outside air into the air purified in the air purification tank. Contaminated air in the semi-enclosed space is sucked into an air purifying tank of the contaminated air purifying apparatus according to any one of claims 1 to 3 via an air intake duct,
Supplying fresh water in a fresh water tank into the air purification tank, and contacting the contaminated air with fresh water to purify the water;
Characterized in that the purified air is returned to the underground space via an air duct.
Contaminated air purification method. The contaminated air in the semi-enclosed space is purified by bringing the contaminated air into contact with fresh water in a contaminated air purifying tank of the contaminated air purifying apparatus according to claim 3,
Characterized in that the outside air introduced from the outside air introduction duct is mixed into the purified air and returned to the semi-enclosed space.
Contaminated air purification method.

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