JPH07204469A - Gas purifier - Google Patents

Abstract

PURPOSE:To embody excellent gas purifying effect by fitting a gas purifier to the exhaust system of a car. CONSTITUTION:A fan 12 having at least one rotary blade 11 is arranged in a housing 10 between the suction port 14 and exhaust port 15 provided to the housing. In this gas purifier, exhaust gas can be effectively purified by the action of plasma generated by the glow discharge accompanied by the rotation of the fan and the metal layer on the surface of the rotary blade. By bringing the sucked gas into contact with the fan in a deoxidized state, still more efficient gas purification is embodied. Further, by providing a magnet to the outer wall of the housing, high density plasma is generated and efficient gas purification is also embodied in this case.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a gas purifying apparatus, and more particularly to a gas purifying apparatus for efficiently purifying polluted gas discharged from factories, automobiles and the like.

[0002]

2. Description of the Related Art With the development of industrial technology, harmful components contained in exhaust gas emitted from various plants not only harm the health of local residents but also cause respiratory diseases such as asthma. However, it is well known that it has become an important factor of air pollution, and in recent years, with the development of the automobile industry, CO _x , NO _x , SO emitted from automobiles, especially diesel cars It is recognized as a global problem that pollutant gases such as _X cause air pollution as well as roadside residents, and countermeasures are urgently needed. .

As measures against this, various exhaust gas devices have been proposed, from those requiring large-scale measures such as factory exhaust gas to those requiring relatively compact devices such as automobiles. As one example, for example, a gas purifying device using plasma discharge, a gas purifying device using a catalyst, and the like have been used effectively.

However, the level of performance of these gas purifiers is not always satisfactory, and the government is not able to tolerate this in the present situation where measures against exhaust gas are not progressing slowly, and a higher level. Is seeking exhaust gas countermeasures. Under these circumstances, recently, an efficient gas purifying apparatus has been proposed which combines a gas purifying method using a catalyst and a gas purifying method using discharge plasma (see “Technical Report”). 1993-01 Institute of Electronics, Information and Communication Engineers). According to this report, using a catalyst / plasma / reactor element using a reed switch, NO _x ,
It has been reported that by decomposing the gas to be treated such as SO _x and CO _x , the catalytic action of the Rn contact metal and the plasma decomposing action of glow discharge are synergized to achieve efficient gas purification. ing. However, the above-mentioned report only describes the basic theory of a system that can achieve gas purification synergistically, and does not disclose what kind of device is specifically used. .

[0005]

SUMMARY OF THE INVENTION Therefore, an object of the present invention is to provide a gas purifying apparatus which can purify various gases synergistically by using a catalytic action and a plasma action alone or in combination. Still another object of the present invention is to provide a gas purification device that purifies gas in a state where oxygen in intake air is significantly reduced.

[0006]

Based on the recognition that the basic technique in the above-mentioned report is the latest one of the prior art, the inventors of the present invention tried through a trial and error method to realize a more effective gas purification device. As a result of the examination, the gas introduced into the gas flow path is caused to generate turbulence by the rotating fan, and the gas is purified by the plasma action due to the glow discharge generated by the minute gap between the rotating blade and the housing in the device. Or
And / or by increasing the contact area with the catalytic metal layer formed on the surface of the rotary vane and / or the inner wall of the housing, a gas that can achieve a synergistic gas purification effect efficiently We have completed the purification device.

That is, according to the present invention, there is provided a gas purifying apparatus characterized in that a fan having at least one rotating blade is arranged between both openings of a housing having an opening composed of an intake port and an exhaust port. To be done. Further, according to the present invention, the gas purification is provided with a gas flow changing member whose outer diameter gradually increases toward the inflow direction of gas from the intake port, closer to the intake port than the rotary blades of the fan. A device is provided. Further, according to the present invention, there is provided a gas purification device in which the gas flow changing member is provided in a conical shape. Further, according to the present invention, there is provided a gas purification device in which a plurality of rotary vanes are provided on the same rotary shaft and each rotates integrally with the rotary shaft. Further, according to the present invention, there is provided a gas purification device in which a plurality of rotary vanes are provided on the same rotary shaft and each independently rotates relative to the rotary shaft. Further, according to the present invention, there is provided a gas purifying apparatus in which the rotating blade has a stepwise cross-sectional shape in the rotating direction. Further, according to the present invention, there is provided a gas purification device in which the planar shape of the rotary vanes is asymmetrical to the left and right.
Further, according to the present invention, there is provided a gas purification device in which the lengths of the rotary vanes are at least partially different. Also,
According to the present invention, there is provided a gas purifying apparatus that uses at least two types of the rotary blades in combination. Further, according to the present invention, there is provided a gas purification device in which a metal layer having a catalytic action is fixed to the surface of the rotary blade. Also,
According to the present invention, there is provided a gas purification device in which the metal layer is formed by fixing a plurality of metals to at least one rotary blade in an exposed state. Further, according to the present invention, there is provided a gas purification device in which the metal layer is made by fixing different metals to at least two rotary blades. Further, according to the present invention, there is provided a gas purification device in which the metal layer is formed by laminating a plurality of metals on at least one rotating blade. Further, according to the present invention, there is provided a gas purification device in which the inner wall of the housing is formed in a substantially cylindrical shape. Further, according to the present invention, there is provided a gas purification device in which an uneven surface is formed on the inner wall of the housing. Further, according to the present invention, there is provided a gas purification device in which the inner wall of the housing is formed in an inclined shape. Further, according to the present invention, there is provided a gas purification device in which a metal layer having a catalytic action is fixed to the inner wall of the housing. Further, according to the present invention,
There is provided a gas purification device in which the metal layer is formed by fixing a plurality of metals in an exposed state. Further, according to the present invention, there is provided a gas purification device in which the metal layer is formed by fixing a plurality of metals in a laminated state. Further, according to the present invention, there is provided a gas purification device in which the metal layer is adhered to both the surface of the rotary blade and the inner wall of the housing. Further, according to the invention, a magnet layer is provided on the outer wall surface of the housing, an electrode (a) is provided on the inner wall surface, and an electrode (b) is provided on at least the tip of the fan facing the inner wall surface.
By applying a high frequency between both electrodes, there is provided a gas purification device capable of generating high density plasma. Further, according to the present invention, there is provided a gas purification device in which the fan is configured to be rotatable by a gas pressure blown from an intake port. Further, according to the present invention, there is provided a gas purification device in which the fan is configured to be rotatable by a power source. Further, according to the present invention, there is provided a gas purification device in which the metal layer has at least one precious metal selected from platinum, palladium, ruthenium, and rhodium adhered thereto. Further, according to the present invention, there is provided a gas purification device having a deoxidizing mechanism provided between the intake port and the fan. Further, according to the present invention, there is provided a gas purifying device in which the deoxidizing mechanism has a configuration in which a heatable silver wire is arranged between an intake port and a fan. Further, according to the present invention, there is provided a gas purification device in which the silver wire is formed in a mesh shape. Further, according to the present invention, there is provided a gas purifying device, wherein the deoxidizing mechanism has a configuration in which a silver powder is filled between an intake port and a fan and a tubular body having a heating means is arranged on an outer wall. Further, according to the present invention, there is provided a gas purifying apparatus in which the deoxidizing mechanism has an electrode structure in which stabilized zirconia is used as an outer electrode and copper is used as an inner electrode and is driven by a sputtering phenomenon. Further, according to the present invention, there is provided a gas purification device in which the deoxidizing mechanism is made of copper. Further, according to the present invention, there is provided a gas purification device in which the deoxidizing mechanism is formed of powdered copper. Further, according to the present invention, there is provided a gas purification device in which the deoxidizing mechanism has a honeycomb structure in which a plurality of cells having inner walls plated with copper are aggregated. Further, according to the present invention, the first deoxidation processing unit and the first deoxidation processing unit that accommodates the deoxidizing mechanism and has one end serving as a passage for inflowing air pollutants and the other end serving as a passage for the air pollutant purification unit. A second state in which both passages of the second deoxidation treatment unit and the first deoxidation treatment unit are opened and both passages of the second deoxidation treatment unit are closed, and the first deoxidation treatment Switching means selectively switchable to a second state in which both passages of the treatment section are closed and both passages of the second deoxygenation treatment section are opened;
In the second state, the pressure of the second deoxidation processing section is reduced, and in the second state, the first
A gas having at least one of a decompression unit for decompressing the deoxidation treatment unit and a heating unit for heating the second deoxidation treatment unit in the first state and heating the first deoxidation treatment unit in the second state. A purification device is provided. Further, according to the present invention, there is provided a gas purifying device in which the deoxidizing mechanism after deoxidizing treatment is reduced by the heat of the gas itself. Further, according to the present invention, a hydrogen storage alloy that stores hydrogen is provided, and hydrogen from the hydrogen storage alloy is supplied to the second deoxidation treatment unit in the first state and the first deoxidation is performed in the second state. There is provided a gas purification device characterized in that a hydrogen supply means for supplying hydrogen from a hydrogen storage alloy is provided in a processing section.
Further, according to the present invention, the deoxidizing mechanism, an anode provided on the upstream side of the gas flow path, and a cathode facing the anode,
Provided is a voltage applying means for applying a voltage between an anode and a cathode, and a gas purification device provided on the cathode side between the anode and the cathode and made of zinc or zinc oxide or indium or indium oxide. The gas purifying apparatus of the present invention functions as a particularly effective gas purifying apparatus by being attached to the exhaust system of an industrial engine.

[0008]

The greatest technical feature of the present invention is that the gas body introduced into the housing causes a turbulent flow due to the action of the rotating fan, so that the catalyst provided in the housing and the gas are efficiently contacted with each other. It is possible to achieve gas purification by being carried out and / or synergistic gas purification can be achieved by using the gas purification in which glow discharge caused by the rotation of the fan is accompanied by plasma action, alone or in combination. It will be appreciated that such a configuration provides a device that can achieve a significantly superior gas cleaning effect.

According to another aspect of the present invention, a gas flow changing member having an outer diameter gradually increasing toward the inflow direction of gas from the intake port is provided on the intake port side of the rotary blade of the fan. . Therefore, the gas flowing into the intake port of the gas purifier hits the surface of the gas flow changing member,
The gas flow is directed toward the inner wall surface of the housing, and for example, when a metal layer having a catalytic action is formed on the inner wall of the housing, the gas can be efficiently contacted with the metal layer having a catalytic action. This improves the gas purification ability. Further, in another aspect of the present invention, the gas flow changing member has a conical shape, and the gas introduced into the intake port is efficiently purified by the same action as described above. Further, according to another aspect of the present invention, a plurality of rotary blades provided on the fan are provided for the same rotary shaft, and each is configured to rotate integrally with the rotary shaft. According to this, the gas body introduced into the housing is made into a turbulent flow by the rotating blade that rotates integrally with the rotating shaft, and this turbulent flow is further generated by the other rotating blade that rotates integrally with the rotating shaft. It becomes a complicated turbulent flow that spreads over a wide area. As a result, the contact between the catalyst and the gas becomes more efficient, and a remarkably excellent gas purification effect is exhibited.

According to another aspect of the present invention, a plurality of rotary vanes are provided on the same rotary shaft and each is independently rotatable relative to the rotary shaft. According to this, the gas body introduced into the housing is made turbulent by the rotating blades that rotate relative to the rotating shaft, and further,
This turbulent flow becomes a complicated turbulent flow that is diffused into a wider area by another rotating blade that is independent of the rotating blade and rotates relative to the rotating shaft. As a result, the contact between the catalyst and the gas becomes more efficient, and a remarkably excellent gas purification effect is exhibited.

According to another aspect of the present invention, a rotary blade,
The catalytic metal layer formed on at least one of the inner wall of the housing and the inner wall of the housing is made of palladium. Hydrogen is selectively occluded by this palladium, whereby C _m H _n in the gas is decomposed into carbon and hydrogen, and the effect of purifying C _m H _n is remarkably excellent.

According to another aspect of the present invention, a magnet layer is provided on the outer wall surface of the housing, an electrode (a) is provided on the inner wall surface, and an electrode (b) is provided on at least the tip of the fan facing the inner wall surface.
By applying a high frequency between the electrodes, high-density plasma is generated between the electrodes, whereby, is to break down the gas, such as NO _X efficiently.

Furthermore, according to another aspect of the present invention, a gas
In the purification device, the gas blown from the intake is filtered
Oxygen content before contact with oxygen
Contact with the fan as low as possible
By doing so, it is possible to achieve extremely efficient gas purification.
it can. In yet another aspect of the invention, air pollutants
On the upstream side of the air pollutant flow path from the purification section, a copper desorption
An oxygen element is provided, and exhaust gas is an air pollutant.
Instead of being supplied directly to the purification unit,
Reach The oxygen contained in the gas contacts the deoxidizing element,
As a result, the reaction of Cu + O → CuO causes exhaust
Oxygen contained in the gas is removed. And after oxygen removal
Exhaust gas is supplied to the air pollution control unit
The gas containing the substance is purified. In the present invention, air pollution
In the substance purification section, the gas with oxygen removed is purified.
Since it is configured to change to a reaction, it reacts in the direction of NO generation and CO generation.
The reaction to the direction is suppressed and NO _X , CO_X Atmosphere
Contaminants can be removed efficiently.

In another aspect of the present invention, the deoxidizing element is made of powdered copper. Therefore,
Before the exhaust gas is supplied to the air pollutant purification section, it contacts copper with a very large surface area, and oxygen is removed more efficiently. In another aspect of the present invention, the deoxidizing mechanism is
The inner wall has a honeycomb structure in which a plurality of cells plated with copper are aggregated, and the exhaust gas has a very large surface area before being supplied to the air pollutant purification unit, as described above. The copper is contacted and oxygen is removed more efficiently. Further, as described above, since the deoxidizing mechanism is formed in the honeycomb structure, the gas flowability is extremely excellent.

According to another aspect of the present invention, a first deoxidizing treatment unit, a second deoxidizing treatment unit, and a switching unit are provided, and when the switching unit sets the first state, The exhaust gas passes through the first deoxidation treatment section, and in the process, the exhaust gas comes into contact with the deoxidation element, and Cu + O → Cu
Oxygen is removed by the reaction of O and is supplied to the air pollutant purification section.

When the oxygen removing ability of the deoxidizing element of the first deoxidizing unit becomes insufficient, the switching means brings the second state. This allows the exhaust gas to reach the second
After passing through the deoxidation treatment part of the exhaust gas and contacting with the deoxidation element in this process, the exhaust gas is supplied to the air pollutant purification part in the state where oxygen is removed as in the above, and the gas is efficiently purified. It Then, in the second state, the decompression unit decompresses the first deoxidation processing unit until the copper oxide is reduced.

As a result, the copper oxide is reduced to return to copper, and the state where deoxidation treatment can be performed again is achieved. When the deoxidizing element capacity of the second deoxidizing processing unit becomes insufficient, the switching unit brings the first state. As a result, the exhaust gas passes through the first deoxygenation processing unit, comes into contact with the deoxidation element in this process, and is supplied to the air pollutant purification unit in a state in which oxygen is removed as described above. . Then, in the first state, the pressure reducing means reduces the pressure of the second deoxidizing unit until the copper oxide is reduced.
As a result, the copper oxide is reduced, returned to copper, and is ready to be deoxidized again. As described above, in the present invention,
By utilizing the period during which deoxidizing treatment is performed by one deoxidizing element, the other deoxidizing element with reduced deoxidizing ability is reduced under reduced pressure to provide sufficient deoxidizing ability again. Therefore, maintenance for replacing the deoxidizing element becomes unnecessary.

Further, in another aspect of the present invention, while the deoxidizing treatment is being performed by one of the deoxidizing elements, the other deoxidizing element having a reduced deoxidizing ability is reduced by heating and is again sufficiently deoxidized. Processing power is given. In addition, in another aspect of the present invention, in addition to the depressurizing means, the second deoxygenation treatment unit is heated in the first state, and the first deoxidation treatment unit is heated in the second state.
A heating means is provided for heating the deoxidation treatment section.
Therefore, while the deoxidizing treatment is being performed by one of the deoxidizing elements, the other deoxidizing element having a reduced deoxidizing ability causes the reaction to proceed in the reducing direction by heating in addition to depressurization, which is extremely reliable and efficient. Oxygen is removed.

Further, according to another aspect of the present invention, during the period in which the deoxidizing treatment is performed by one of the deoxidizing element of the first deoxidizing treatment section and the deoxidizing element of the second deoxidizing treatment section. , And hydrogen is supplied to the other deoxidizing element by the hydrogen supply means to reduce copper oxide (CuO + H ₂ → Cu + H
₂ O).

In another aspect of the present invention, the gas purifying device is provided in the gas exhaust system of the automobile. After the deoxidation treatment, the deoxidation mechanism is reduced by heating by the exhaust gas of the automobile, and returns to a state where the deoxidization ability is sufficient. Further, in another aspect of the present invention, the cathode and the anode facing each other are provided on the upstream side of the air pollutant flow path from the air pollutant purification unit, and on the cathode side between the anode and the cathode, A deoxidizing element formed of zinc or indium is provided. In the present invention, the exhaust gas is
First, without being directly supplied to the air pollutant purification section,
Deoxidizing element. Oxygen contained in the exhaust gas comes into contact with zinc or indium, or comes into contact with a site in which oxygen atoms are released by sputtering in zinc oxide (indium oxide), whereby Zn + O → ZnO.
Oxygen contained in the exhaust gas is selectively occluded by the reaction (In + O → InO), and oxygen in the exhaust gas is removed. Then, the exhaust gas from which oxygen has been removed is supplied to the air pollutant purification unit, and the gas containing the air pollutant is purified. When a voltage is applied between the anode and the cathode by a voltage applying means, a discharge occurs between the anode and the cathode, and the cations generated by this discharge are sputtered by the ions when accelerated to the cathode side. Due to the phenomenon, oxygen is desorbed from ZnO or InO, and Zn or I
Then, the state returns to n and returns to a state where it can be used as a deoxidizing element. In still another aspect of the present invention, the gas purifying device is provided in the industrial engine. According to this, the gas exhausted from the industrial engine is purified by the gas purification device to be in a clean state. The industrial engine in this case means an engine provided in an automobile, a ship, a tractor, or the like.

[0021]

DETAILED DESCRIPTION OF THE INVENTION
It will be described with reference to the drawings. FIG. 1 is a side sectional view showing an example of the gas purifying apparatus of the present invention, and FIG. 2 is a sectional view taken along line AA of FIG.
It is a line sectional view. In the gas purifying apparatus of the present invention, it is first important that the housing 10 is provided with at least two openings including the intake port 14 and the exhaust port 15, and the fan 12 having the rotating blades 11 is disposed between the openings. It is a characteristic. The fan 12 varies depending on the size of the housing 10, but at least one fan 12 is arranged in the housing 10, and if the housing 10 becomes large,
You can add more than one. In the present invention, it is important to generate a glow discharge by a minute gap between the rotating fan 12 and the inner wall 13 of the housing 10. Further, the gas may flow in a turbulent state in the housing 10 as well. It is preferable in terms of purification efficiency.

To this end, the rotating blade 11 in the rotating state
The inner wall 13 of the housing 10 and the inner wall 13 are formed at a constant interval, that is, the inner wall 13 is most preferably a cylindrical shape. In addition to this structure, the inner wall 13 may be formed with irregularities. By forming them in a slanted shape or by appropriately combining these configurations, a more efficient gas purification effect can be achieved.

The fan 12 basically has at least one rotary blade 11 between the openings, and the rotary blade 11 has a sectional shape in the rotational direction as shown in FIG. Is stepwise, the plane shape is left-right asymmetric, the blade length is at least partially different, or a combination of at least two types of the rotary blades 11 is used for gas purification. It is even more efficient.

Further, as another mode of the fan 12, there may be mentioned one in which the gas flow changing member 25 is fixed to the fan 12 (see FIG. 15). That is, as shown in FIG.
A cone-shaped gas flow changing member 25 is provided on the fourth side. The gas flow changing member 25 is arranged so that the outer shape gradually increases from the intake port 14 side toward the exhaust port 15 side. As described above, by providing the gas flow changing member 25 in the fan 12, the gas flowing into the housing 10 through the intake port 14 hits the outer peripheral surface 25A of the gas flow changing member 25 and is guided to the outer peripheral surface 25A. As a result, the flow flows toward the inner wall 13 of the housing 10.
Therefore, the gas is surely supplied to the minute gap between the fan 12 and the inner wall 13, and the gas can be purified very effectively by glow discharge.

In the above description, the gas flow changing means 25 has a conical shape. However, the gas flow changing means 25 has an outer circumference which gradually increases from the intake port 14 side toward the exhaust port 15 side. It is all right, for example, triangular cone shape,
It may be a square cone shape, a truncated cone shape, or the like. Also,
As the fan 12, a mode in which two rotary blades are fixed to a rotary shaft (not shown) can be mentioned. The rotary shaft can be connected to a power source, and when the rotary shaft rotates by the power source, the two rotary blades also rotate together with the rotary shaft.

According to this structure, the gas introduced into the housing 10 is made into a turbulent flow by the rotating blades that rotate integrally with the rotating shaft, and this turbulent flow also causes the other rotating blade that rotates integrally with the rotating shaft. By this, a complicated turbulent flow that further diffuses in a wide region is obtained, which is preferable in terms of gas purification efficiency. In the above description, the number of rotary blades fixed to the rotary shaft is two, but it is needless to say that the effect of forming a turbulent flow suitable for gas purification can be sufficiently exerted even if three or more rotary blades are fixed.

The fan 12 has two rotary blades,
The rotary shaft may be rotatably supported, and the rotary vanes may independently and independently rotate relative to the rotary shaft. In this case, the power source may be connected,
Even without a power source, the rotary vanes can be independently rotated by the gas pressure. According to this configuration, the gas introduced into the housing 10 is made into a turbulent flow by the rotating blades that rotate relative to the rotating shaft, and further, this turbulent flow is independent of this rotating blade and on the rotating shaft. The other rotating blades that rotate relative to each other form a complicated turbulent flow that further diffuses into a wide region, which is preferable in terms of gas purification efficiency. In the above description, two rotary blades that can rotate relative to the rotary shaft are provided, but even if three or more rotary blades are provided, the effect of forming a turbulent flow suitable for gas purification can be sufficiently exhibited. Needless to say.

The intake port 14 and the exhaust port 15 are preferably provided on opposite surfaces of the housing 10, and their shapes are not necessarily formed in the central portion of the housing 10 as shown in FIG. It is not necessary to provide the openings, and for example, it is sufficient that openings having an arbitrary shape such as a grid shape or a grid shape are formed at least partially on the wall surface in the gas inflow direction and the gas discharge direction. Further, it is needless to say that the constituent parts may be formed not only on both sides in the lateral direction as shown in FIG. 1 but also in the vertical direction as shown in FIG. In terms of purification efficiency, it is preferable that the inlet and the outlet are provided so that gas flows from one end of the housing 10 to the other end.

In the gas purifying apparatus of the present invention, the gas blown from the intake port 14 is brought into contact with the deoxidizing mechanism before it comes into contact with the fan 12 to reduce the oxygen content to, for example, the ppm order, By contacting the fan 12 in this state, the gas purification efficiency is significantly improved.

The second feature of the present invention is that a metal layer having a catalytic action is formed on at least one of the surface of the rotating blade 11 of the fan 12 and the inner wall 13 of the housing 10. Metals having a catalytic action are conventionally known and include, for example, iridium, chromium, cobalt, zirconium, cesium, tungsten, tantalum, titanium, iron, tellurium, niobium, which are classified as transition metals.
Examples include nickel, platinum, vanadium, hafnium, palladium, manganese, molybdenum, ruthenium, rhenium, rhodium and the like. Among these, noble metals such as platinum, palladium, ruthenium and rhodium are most preferably used.

In order to form these metal layers, a plating method by an electroplating method or a chemical plating method known per se is preferably adopted, but an arbitrary method such as forming the metal into a foil and fixing it with an adhesive agent. Can also be adopted. When the metal layer is formed by the plating method, the plating layer can be usually formed under the conditions of room temperature to 50 ° C. for 20 minutes to 2 hours, although it depends on the kind of metal used. Although the thickness of the metal layer is not particularly limited, it is usually 3
It is preferably formed to a thickness of about 10 μm.

The metal having the catalytic action exemplified above is
Although effect can be exhibited to the purification of air pollutants such as NO _X,
Palladium is particularly suitable for C _m H _n (CH ₄ , C ₂ H _4, etc.)
It was found to be extremely excellent in the purification of.

The material forming the housing 10 is metal,
It can be made of glass, ceramics, or a functional polymer material such as polyphenylene ether capable of forming a metal layer by plating or the like. Fan 1 of the present invention
In No. 2, it is necessary to form a metal layer on the blades, and it is necessary for glow discharge to be generated from the rotating blades 11 at the time of rotation. In order to meet the requirement, it is preferable that the blades are made of metal.

In the present invention, the metal layer achieves more efficient gas purification by various combinations of the number and shape of the blades of the fan 12 described above. That is, it is preferable that the number and shape of the rotating blades 11 of the fan 12 are configured so that the glow discharge is more easily generated by the rotation, and as shown in FIG. 7, the gap (gap) is small in the rotating direction. It is preferable to configure the shape so as to spread widely. In addition, the rotary blade 11
Further, the metal layer formed on the inner wall of the housing can fix not only a single metal but also a plurality of metals at the same time to improve the gas purification efficiency.

As an example thereof, there is a mode in which a plurality of metals, for example, platinum and palladium, are exposed on the surface of the rotary blade 11 and are combined in an arbitrary shape to form a metal layer. In addition, a mode in which different metal layers are formed on at least two blades, that is, one in which a platinum layer is formed on the surface of one blade and a palladium layer is formed on the surface of the other blade, the gas purification efficiency is also improved. It is effective to achieve it efficiently. Furthermore, there is a mode in which a plurality of metals are formed in a laminated state on at least one blade, that is, an example in which a platinum layer is formed as a first layer on the surface of the blade and a palladium layer is formed thereon. To be In this case, even if the metal forming the surface layer is consumed due to abrasion or the like, the metal layer forming the second layer can newly exhibit the gas purification function.

In addition, the formation of such a metal layer is naturally applied to the inner wall of the housing, and combining a plurality of metals in an exposed state or forming them in a laminated state is effective as in the case of the rotary blade 11. It will be understood that, in these embodiments, it is naturally included in the technical idea of the present invention that the kind of metal is arbitrarily changed and that each embodiment is arbitrarily combined and used.

The fan 12 in the gas purification apparatus of the present invention
In the case where the power source is turned on / off to start / stop, the rotation speed can be adjusted arbitrarily, so more effective gas purification efficiency can be mentioned, but even if the power source is not used, The fan 12 can also be started by the fluid pressure of the gas blown into the device, whereby glow discharge is generated from the rotating rotary blades 11 and the accompanying plasma action makes it possible to achieve gas purification. . At this time, since the gas in the housing 10 is flowing in a turbulent state, purification of the gas by the plasma action is achieved more efficiently.

The advantage of making the gas in the housing 10 in a turbulent state is that the rotating blades 1 of the fan 12 in the first term
It is also confirmed by effective contact with the metal layer having a catalytic action formed in No. 1, and when these actions are used together, a remarkably excellent synergistic gas purification effect is obtained.

In the present invention, in order to achieve a more effective gas purification effect, it is important to increase the contact area between the gas and the metal layer. For that purpose, the formation area of the metal layer is increased. And, it is preferable to increase the rotational force of the fan 12, but there is usually a restriction on the cost and size of the device, and as a practical one, the contact area of the gas to the metal layer per minute is Is 30 cc / mi
It is preferably around n. Further, when the fan 12 is started by a power source, a switch (not shown) known per se connected to the fan 12 in the apparatus is turned on / off. At that time, the rotation speed of the fan 12 can be appropriately adjusted by a control mechanism connected to the switch.

The gas purifying apparatus of the present invention is preferably operated under a reduced pressure condition in order to stabilize and maintain glow discharge. Therefore, it is recommended to operate the gas purifying apparatus in a closed system. It

Another preferable mode of the gas purifying apparatus of the present invention is to significantly increase the gas decomposition efficiency by generating a high density plasma between the rotating fan 12 and the inner wall of the housing. In order to generate a high density plasma between the rotating fan 12 and the inner wall of the housing, in the present invention, as shown in the side sectional view of FIG.
The magnet layer 17 is on the outer wall surface of the housing 10, and the electrode 1 is on the inner wall surface.
9 (a) is provided and the fan 11 faces the inner wall surface.
Electrodes 19 (b) are also provided at least at the tip of each of the electrodes, and a high frequency of, for example, ECR (40.68 MH _Z ) is applied between the electrodes, so that an electron density of 10 ²⁰ is provided between the electrodes.
A high-density plasma 18 of / m ² or more is generated, and thus gas such as No _x can be efficiently decomposed.

The principle of generating a high-density plasma between the electrodes is based on a modeled ECR shown in FIG.
(Electroron Cyclotron Reso
nance) effect. That is, when a high frequency is applied between the electrodes 19 (a), 19 (b), the change of A → B → C in FIG. 9 occurs, and when the state becomes C, 19 (a), 19 ( b) high density Purasuzuma is occur during, the occurrence of the plasma in which enhance degradation of such No _x in the gas.

Noble metals such as Pt, Rh and Pd are used for the electrode, but Rh is most preferably used.

In the present invention, as described above, the gas blown from the intake port is brought into contact with the deoxidizing mechanism before it comes into contact with the fan 12, and is brought into contact with the fan 12 with the oxygen content kept as low as possible. Are preferable for achieving more efficient gas purification.

When oxygen coexists in the exhaust gas, NOx
Is known not only to be effectively removed, but also to be directed to NO production. Recently, it has been reported that NOx selective reduction can be achieved by appropriately selecting a catalyst using hydrocarbons. Has been done.

However, according to the research conducted by the present inventors, even if oxygen is present in the exhaust gas, if H ₂ O is mixed in this system, the effect of NO generation can be prevented. found. Therefore, a humidity sensor is placed on the output side of the gas purification device, and based on that information, H
_The NO control action can be introduced by positively introducing the ₂ O component and controlling the humidity%.

In the present invention, as the deoxidizing mechanism,
(1) a method of bringing heated silver into contact with oxygen, (2) a method of sputtering a surface of stabilized zirconia to bring a part of the surface into a deoxidized state, and selectively storing oxygen therein. (3) A method in which copper and oxygen are brought into contact with each other, and (4) a method in which a part of the surface is deoxidized by sputtering the surface of zinc oxide or indium oxide, and oxygen is selectively stored therein is preferable. Can be adopted.

The method of bringing heated silver into contact with oxygen is as follows.
This is because silver, which is stable to oxygen at room temperature, utilizes the property of oxygen forming a solid solution in silver when heated to a high temperature. Silver has a melting point of 961 ° C. and a boiling point of 1980.
It is a metal at 0 ° C, but when this silver is heated to 600 ° C, it becomes 0.
001% of oxygen is solid-solved in silver, and it is 0.00 at 930 ° C.
6% oxygen forms a solid solution in silver.

As a first mode of the deoxidizing mechanism in the present invention, it is effective to dispose a silver wire having a heating means between the intake port 14 and the fan 12. In order to effectively perform deoxidation using a silver wire, it is preferable to make the contact area between the silver wire and oxygen as large as possible, and it is desirable to arrange the silver wires densely so as not to obstruct gas flow.

The most preferable mode is to dispose a deoxidizing mechanism 20 having a mesh of silver wire between the intake port 14 and the fan 12, as shown in FIG.
In this case, the mesh size is usually 10 to 50.
The mesh is preferably about 15 to 30 mesh. If the mesh size exceeds 50 mesh, the mesh-like silver wire tends to obstruct the gas flow state.
When it is less than the mesh, the deoxidizing ability becomes poor.
A drive circuit (not shown) is connected to the silver wire,
A method in which a pulse current is passed to momentarily raise the temperature of silver is preferably adopted. The temperature of silver heated by the pulse current is about 600 to 930 ° C., and this temperature condition can be arbitrarily adjusted by changing the pulse peak value and pulse time of pulse driving.

According to the experiments by the present inventors, the oxygen in the gas can be reduced by two digits or more by using this deoxidizing mechanism. It should be noted that the oxygen occluded excessively may be released by sputtering when the element is OFF and kept in a stable state.

The second mode of the deoxidizing mechanism using silver is to fill the tubular body with powdered silver and raise the temperature of the silver by heating from the wall surface of the tubular body. It is a method of distributing and storing oxygen. In this mode, it is preferable to arrange as many thin tubes filled with silver powder as possible between the intake port and the fan to increase the contact area between the gas and the silver powder. As a preferable mode for carrying out this method, it is recommended to provide a heating means such as a Peltier element or a heater on the outer wall of the tubular body.

Next, the preferred method for the deoxidizing mechanism is as follows.
A method can be mentioned in which a part of the surface is deoxidized by sputtering the surface of the stabilized zirconia, and oxygen is selectively stored therein. This method is characterized by using stabilized zirconia (YSZ) as the outer electrode,
When copper is used as the inner electrode and a high-frequency current is passed from the drive circuit, a sputtering phenomenon occurs and a part of the surface of the YSZ is activated to be in a deoxidized state, and oxygen in the gas is selectively stored in this part. Especially.

The current from the drive circuit is intermittently turned ON / OF.
Repeating F, in this method as well, it is desirable that the excessively occluded oxygen be released by sputtering when the element is OFF and kept in a stable state.

FIG. 11 shows another aspect of the deoxidizing mechanism. The intake port 14 (see FIG. 1) of the housing 10 is provided with a first deoxidation processing unit 16 and a second deoxidation processing unit 22. The first deoxidizing unit 16 and the second deoxidizing unit 22 are made of ceramics and are formed in a cylindrical shape, and a deoxidizing element 24 is housed inside each. The deoxidizing element 24 is formed by plating a member 21 to be plated, which is made of ceramics and has a cylindrical outer shape, with copper. This plated member 21 is shown in FIG.
In the honeycomb structure, a plurality of cells 23 forming a polygonal space (a hexagonal shape is shown in FIG. 12) as shown in a plan view are adjacent to each other. The cells 23 extend in a direction orthogonal to the paper surface, and the axial direction of each cell 23 (the direction orthogonal to the paper surface of FIG. 12) is such that the first deoxidation processing unit 16 and the second deoxidation processing portion The state coincides with the axial direction of the portion 22. The inner surface of the wall portion forming each cell 23 is copper-plated over the entire surface, so that the surface area of the copper in contact with the gas is sufficiently secured and the deoxidation treatment capacity is sufficiently enhanced. There is.

In FIG. 11, the deoxidizing element 24 has a first deoxidizing element in order to clarify the boundaries between the respective constituent members.
Although it is illustrated as being separated from the inner surfaces of the deoxidization processing unit 16 and the second deoxidation processing unit 22 of the above, in reality, they are in close contact with each other, and the gas always passes through each cell 23. ing. It is preferable to use the cell 23 having an axial length of 3 to 5 cm and an inner diameter of 3 to 5 cm, although it depends on the concentration of the contaminated gas to be treated. As shown in FIG. 11, an exhaust gas inflow portion 26,
A first valve 28 as a switching unit is provided between the first deoxidation processing unit 16 and the second deoxidation processing unit 22, and the first deoxidation processing is performed by the first valve 28. The exhaust gas from the inflow section 26 can be selectively passed through one of the section 16 and the second deoxidation processing section 22.

Further, a vacuum pump (not shown) is connected to the first deoxidizing unit 16 and the second deoxidizing unit 22, whereby the first deoxidizing unit 16 and the second deoxidizing unit 16 are connected. 10 ^-2 to 1 inside each of the two deoxidation processing units 22
The pressure can be reduced to 0 ^-4 atm. Also, the first
A metal material such as tungsten is sintered on the outer surface of the peripheral wall of the deoxidizing unit 16 and the peripheral wall of the second deoxidizing unit 22, and a voltage is applied to the tungsten to raise the temperature, By generating heat, the inside of the first deoxidizing treatment unit 16 and the inside of the second deoxidizing treatment unit 22 can be set within a temperature range of 400 to 1100 ° C. The tungsten heater is provided on the entire peripheral wall of the first deoxidizing unit 16 and the peripheral wall of the second deoxidizing unit 22 or on a part thereof. Further, the second valve 3 serving as a switching means is provided between the housing 10 and the first deoxidizing unit 16 and the second deoxidizing unit 22.
0 is provided, and the switching by the second valve 30 allows the first deoxidation processing unit 16 and the intake port 14 of the housing 10 to communicate with each other so that the second deoxidation processing unit 22 and the intake port 14 are connected to each other. The state where there is no communication and the second deoxidation processing unit 22 and the intake port 14 communicate with each other and the first deoxidation processing unit 16
And the intake port 14 can be switched to a state in which they do not communicate with each other.

When purifying the gas, the first valve 28
The first deoxidation processing unit 16 is set to a state (first state) in which the first deoxidation processing unit 16 communicates with the inflow unit 26 and the intake port 14 of the housing 10 by switching with the second valve 30 (at this time, the second deoxidation process). The oxygen treatment unit 22, the inflow unit 26, and the intake port 14 are in a disconnected state). This allows
The gas to be purified enters the first deoxidation processing unit 16 and passes through the cells 23 of the deoxidation element 24 in this processing unit. During this process, the gas contacts the plated copper and C
Oxygen is removed by the reaction of u + O → CuO and is supplied into the housing 10 to efficiently purify air pollutants.

The deoxidizing element 24 of the first deoxidizing unit 16
When the oxygen removal capacity of the above becomes insufficient, the switching operation by the first valve 28 and the second valve 30 causes
The second deoxidization processing unit 16 is set to a state (second state) in which the second deoxidation processing unit 16 communicates with the inflow unit 26 and the intake port 14 of the housing 10 (at this time, the first deoxidation processing unit 16 and the inflow unit 2).
6 and the intake port 14 are in a disconnected state). As a result, the gas to be purified is the second deoxygenation processing unit 22.
It enters inside and passes through the inside of the cell 23 of the deoxidizing element 24 in this processing section. In this process, the gas comes into contact with the plated copper and is supplied into the housing 10 in a state where oxygen is removed, and the air pollutants are efficiently purified.

Then, in this second state, the pressure of the first deoxidizing unit 16 is reduced by the vacuum pump until the state is such that copper oxide is reduced. As a result, the copper oxide is reduced, returned to copper, and is ready to be deoxidized again. When the deoxidizing element capacity of the second deoxidizing unit 22 becomes insufficient, the first state is restored again by the switching operation by the first valve 28 and the second valve 30. As a result, the gas to be purified passes through the first deoxidizing unit 16 and comes into contact with the deoxidizing element 24 in this process, and is supplied into the housing 10 in a state where oxygen is removed as described above. To be done. Then, in this first state, the pressure of the second deoxidation processing unit 22 is reduced by the vacuum pump until the copper oxide is reduced. As a result, the copper oxide is reduced, returned to copper, and is ready to be deoxidized again.

In the above description, the copper constituting the deoxidizing element 24 is provided in a plated state, but it is made into a powder form and the first deoxidizing treatment section 16 and the second deoxidizing treatment section 22 are made. You may fill in. In this case, the copper powder preferably has a particle size of 0.5 mm or more.
This is because if the particle size of the copper powder is smaller than 0.5 mm, it becomes difficult for the target gas to flow. The copper used as the deoxidizing element 24 is not limited to the above-mentioned plated state or powdery state, and can be carried by the first deoxidizing treatment unit 16 and the second deoxidizing treatment unit 22, or sputtered or sputtered. It may be in a vapor deposition state.

In the above description, the reduction of the deoxidizing element 24 is performed in a state where the copper oxide can be reduced by heating with metal such as tungsten and the depressurizing action by the vacuum pump. It may be in a reducible state. As an example of this, there can be mentioned a configuration in which a gas purifying device is provided in the exhaust system of an automobile so that copper oxide can be reduced by the exhaust gas of the automobile.

In this case, for example, each of the first deoxidizing unit 16 and the second deoxidizing unit 22 is housed in the ceramic inner cylinder 38 and the inner cylinder 38 as shown in FIG. The deoxidizing element 24 may be arranged in each of the inner cylinders 38. Then, the exhaust gas of the automobile is caused to flow into the space 42 between the inner cylinder 38 and the outer cylinder 40, and the deoxidizing element 24 is heated by the heat of this gas. By this heating, the oxidized deoxidizing element 24 is reduced (CuO → Cu + O), and the state where the deoxidizing ability can be sufficiently exhibited again is restored. Zinc oxide is reduced at about 1050 ° C or higher under atmospheric pressure, but the exhaust gas of automobiles is 300 to 1500 ° C.
The deoxidizing element 24 can be reduced without providing a special heating means, and energy can be effectively used.

Further, in the above, the deoxidizing element 24 may be in a state in which copper oxide can be reduced only by the action of reducing the pressure by the vacuum pump. In this case, at room temperature, the deoxidizing element 24 may be depressurized to 10 ^-12 atm or less.

As a method of reducing the deoxidizing element 24,
The hydrogen is supplied to the first deoxidation processing unit 16 (second deoxidation processing unit 2
2) can be configured to feed in. In this case, instead of the vacuum pump described above, a cylinder filled with palladium as a hydrogen storage alloy in which hydrogen is stored is provided with a first deoxidation processing unit 16 and a second deoxygenation unit through a switching valve. It is connected to the processing unit 22. As a result, in the first state, when the deoxidizing element 24 of the first deoxidizing unit 16 is oxidized and the deoxidizing ability of the deoxidizing element 24 becomes insufficient, the same operation as described above is performed. In addition to the second state, hydrogen gas is supplied from the cylinder into the first deoxidation processing unit 16 by the switching valve. As a result, copper oxide is reduced (CuO + H ₂ → Cu + H ₂
O) The oxygen scavenging element 24 returns to a state in which the oxygen scavenging capacity can be fully exerted.

In this second state, the second deoxidizing unit 2
When the deoxidizing element capacity of No. 2 becomes insufficient, the first deoxidizing unit 22 is brought into the first state again, and in this first state, the hydrogen gas is supplied from the cylinder to the second deoxidizing unit 22 by the switching by the switching valve. Is supplied to the second deoxidizing unit 22, the deoxidizing element 24 of the second deoxidizing unit 22 is reduced, and the deoxidizing element 24 can fully exhibit its deoxidizing ability.

FIG. 14 shows another mode of the deoxidizing mechanism. An anode 32 and a cathode 34, which face each other, are provided in the front stage of the housing 10 shown in FIG. 1 (upstream of the housing 10 from the housing 10). A deoxidizing thin film 36 made of a zinc oxide thin film is formed on the surface of the cathode 34 facing the anode 32. Further, a DC voltage applying means (not shown) is connected between the anode 32 and the cathode 34, and the anode 32
A DC voltage is applied between the cathode and the cathode 34.

When a DC voltage is applied between the anode 32 and the cathode 34 by the DC voltage applying means, the anode 32 and the cathode 3
A glow discharge is generated between the thin film for deoxidation 3 and the cations generated by the glow discharge are accelerated toward the cathode 34 side by sputtering by the accelerated cations.
Part of 6 becomes an active deoxidized state, oxygen is selectively occluded in this part, and oxygen in the gas is removed. The site in which oxygen is stored is again in an active deoxygenated state by sputtering with cations, and oxygen in the gas can be stored again.

The zinc oxide as the deoxidizing mechanism is not limited to the above thin film, and may be provided in the state of bulk metal or the like. Further, zinc, indium, or indium oxide may be used as the material used for the deoxidizing mechanism.

[0070]

According to the present invention, it is possible to purify exhaust gas containing harmful components discharged from factories, automobiles, etc. with a simple device and with extremely excellent purification efficiency. It is possible to provide a gas purification apparatus that can sufficiently meet the exhaust gas countermeasures for strict factory exhaust gas and automobiles, especially diesel vehicles that emit a lot of harmful gas. Furthermore, according to the present invention, it is possible to provide a gas purification device that can purify gas in a state where oxygen in intake air is significantly reduced, that is, in a state where gas purification efficiency is extremely high.

[0071]

EXAMPLES The present invention will be described below based on examples.
This example is disclosed to aid the understanding of the present invention and is not intended to limit the present invention. Therefore, it will be understood that the technical scope of the present invention is included without departing from the technical idea of the present invention.

<Embodiment 1> As shown in FIG. 1, a metallic cylindrical shape having an inner diameter of 5 mm and a cylindrical opening of 5 mm at both ends, an inner diameter of 25 mm, a length of 200 mm, and a wall thickness of 0.5 mm was used. Inside the housing, two fans each having 10 blades, which are configured so as to have a divergent tip and are formed at an angle of 45 ° with respect to the rotation direction, are arranged at 100 mm intervals, and the distance from the inner wall is 1 mm.
It was arranged to be mm. A platinum layer having a thickness of 5 μm was formed on each tip of the rotary blades of the fan by electroplating, and a palladium layer having a thickness of 5 μm was also formed on the inner wall surface of the housing. From the gas introduction opening corresponding to 14 in FIG.
N ₂ + NO (240ppm), flow rate 30cc / min,
The gas was introduced under the gas conditions of a pressure of 1.1 atm. The decomposition ability when the number of rotations of the fan was 7,000 rpm was measured in terms of frequency dependence and glow discharge current dependence, and shown in FIGS. 4 and 5, respectively.

<Embodiment 2> The shape of the rotating blades of the fan is
The cross section in the direction of rotation is formed stepwise as shown in FIG.
The same procedure as in Example 1 was carried out except that the platinum layer was carried on the upper part and the rhodium layer was carried on the lower part. As a result, N ₂
It was confirmed that the NO contained therein was decomposed into N and O.

<Embodiment 3> As shown in FIG. 8, between the gas intake port and the fan of the gas purifying apparatus used in Embodiment 1, as shown in FIG.
A 16-mesh net-like product made of a silver wire having a thickness of 10 μ was formed on the inner wall of the housing so as to contact the entire circumference. The silver wire was heated to 920 ° C. by a pulse current, and the O ₂ content was 0.02.
A ternary gas containing 5% of N ₂ + NO + O ₂ was introduced under the conditions of a flow rate of 30 cc / min and a pressure of 1.1 atm. The rotation speed of the fan was set to 7000 rpm. In this case, the same decomposition ability as that of the gas of Example 1 containing no O ₂ was exhibited.

[0075]

[Brief description of drawings]

FIG. 1 is a cross-sectional view showing an example of a gas purification device of the present invention.

FIG. 2 is a sectional view taken along the line AA of FIG.

FIG. 3 is a cross-sectional view showing another example of the gas purification apparatus of the present invention.

FIG. 4 is a graph showing frequency dependence of gas decomposing ability obtained in Example 1.

FIG. 5 is a graph showing the dependency of the gas decomposing ability obtained in Example 1 on glow discharge current.

FIG. 6 is a diagram showing an example of a cross-sectional shape of a rotary blade of a fan used in Example 2.

FIG. 7 is a diagram showing an example of a planar shape of rotary blades of a fan used in Example 2;

FIG. 8 is a side sectional view showing an example of a gas purifying apparatus in which an escape oxygen mechanism in Example 3 is arranged.

[Fig. 9] A magnet is provided on the outer wall of the housing of the gas purifier,
It is a side view of a gas purification device in which electrodes are formed on an inner wall surface and a fan.

10 is a diagram modeling the state of plasma generation in the apparatus of FIG.

FIG. 11 is a diagram showing an example of a deoxidizing mechanism of the present invention.

12 is a diagram of the deoxidizing element of FIG. 11 viewed from the left and right direction of FIG.

FIG. 13 is a diagram of the deoxidation treatment unit including the deoxidation mechanism of FIG. 11 as seen from the axial direction thereof.

FIG. 14 is a diagram showing an example of a deoxidizing mechanism of the present invention.

FIG. 15 is a cross-sectional view showing another aspect of the configuration of the fan of the present invention.

[Explanation of symbols]

 10 Housing 11 Rotating Blades 12 Fan 13 Inner Surface 14 Inlet Vent 15 Exhaust Port 16 First Deoxidation Processing Section 17 Magnet 19 Electrode 20 Deoxidation Mechanism 22 Second Deoxidation Processing Section 25 Gas Flow Change Member 23 Cell 28 First Valve (Switching means) 30 Second valve (switching means) 32 Anode 34 Cathode

Continuation of the front page (51) Int.Cl. ⁶ Identification number Reference number within the agency FI Technical indication location B01D 53/86 ZAB B01D 53/36 ZAB (72) Inventor Go Yanobu 2-3, Shirute, Tsurumi-ku, Yokohama-shi, Kanagawa No. 6 in Hokushin Kogyo Co., Ltd. (72) Inventor Yuji Hayashi 1015 Kamiodanaka, Nakahara-ku, Kawasaki-shi, Kanagawa Fujitsu Limited

Claims (39)

[Claims] 1. A gas purifying apparatus, wherein a fan having at least one rotating blade is arranged between both openings of a housing having an opening composed of an intake port and an exhaust port. 2. A gas flow changing member, the outer diameter of which gradually increases toward the inflow direction of gas from the intake port, is provided closer to the intake port than the rotary blades of the fan. The gas purification device described. 3. The gas purifying apparatus according to claim 2, wherein the gas flow changing member is provided in a conical shape. 4. The gas purifying apparatus according to claim 1, wherein a plurality of the rotary blades are provided on the same rotary shaft, and each rotary blade rotates integrally with the rotary shaft. 5. The gas purifying apparatus according to claim 1, wherein a plurality of the rotary blades are provided on the same rotary shaft and each independently rotates relative to the rotary shaft. 6. The cross-sectional shape of the rotating blade in the rotating direction is
The gas purification device according to claim 1, wherein the gas purification device has a stepped shape. 7. The gas purifying apparatus according to claim 1, wherein a planar shape of the rotary blade is bilaterally asymmetric. 8. The gas purification apparatus according to claim 1, wherein the rotary vanes have at least partially different lengths. 9. The gas purifying apparatus according to claim 1, wherein the rotary blade is a combination of at least two kinds described in claims 6 to 8. 10. The gas purifying apparatus according to claim 1, wherein a metal layer having a catalytic action is fixed to the surface of the rotary blade. 11. The gas purifier according to claim 10, wherein the metal layer is formed by fixing a plurality of metals to at least one rotating blade in an exposed state. 12. The metal layer is formed by fixing different metals to at least two rotary blades.
0 gas purifier. 13. The gas purifier according to claim 10, wherein the metal layer is formed by stacking a plurality of metals on at least one rotary blade. 14. The gas purifying apparatus according to claim 1, wherein an inner wall of the housing is formed into a substantially cylindrical shape. 15. The gas purifier according to claim 1, wherein an uneven surface is formed on an inner wall of the housing. 16. The gas purifier according to claim 1, wherein an inner wall of the housing is formed in an inclined shape. 17. The gas purifying apparatus according to claim 14, wherein a metal layer having a catalytic action is fixed to the inner wall of the housing. 18. The gas purifier according to claim 17, wherein the metal layer is formed by fixing a plurality of metals in an exposed state. 19. The gas purifier according to claim 17, wherein the metal layer is formed by fixing a plurality of metals in a laminated state. 20. The gas purifying apparatus according to claim 6, wherein the metal layer is fixed to both the surface of the rotary blade and the inner wall of the housing. 21. A magnet layer is provided on the outer wall surface of the housing, an electrode (a) is provided on the inner wall surface, and an electrode (b) is also provided on at least the tip of the fan facing the inner wall surface, and a high frequency wave is applied between both electrodes. The gas purification apparatus according to any one of claims 1 to 20, wherein a high-density plasma is generated by being applied. 22. The gas purifying apparatus according to claim 1, wherein the fan is configured to be rotatable by a gas pressure blown from an intake port. 23. The gas purifying apparatus according to claim 1, wherein the fan is configured to be rotatable by a power source. 24. The gas purifying apparatus according to claim 10, wherein the metal layer has at least one kind of noble metal selected from platinum, palladium, ruthenium, and rhodium adhered thereto. 25. The gas purifier according to claim 1, further comprising a deoxidizing mechanism provided between the intake port and the fan. 26. The deoxidation mechanism comprises a heatable silver wire disposed between an intake port and a fan.
The gas purification device described. 27. The gas purifier according to claim 26, wherein the silver wire is formed in a mesh shape. 28. The gas purifying apparatus according to claim 25, wherein the deoxidizing mechanism has a configuration in which a tubular body having silver powder filled in and an outer wall having a heating means is disposed between an intake port and a fan. 29. The deoxidation mechanism has an electrode structure in which stabilized zirconia is used as an outer electrode and copper is used as an inner electrode, which is driven by a sputtering phenomenon.
The gas purification device described. 30. The gas purifier according to claim 25, wherein the deoxidizing mechanism uses copper as a deoxidizing agent. 31. The gas purifier according to claim 30, wherein the deoxidizing mechanism is made of powdered copper. 32. The gas purifying apparatus according to claim 30, wherein the deoxidizing mechanism has a honeycomb structure formed by assembling a plurality of cells having copper plating inside. 33. A first deoxidation processing unit that accommodates the deoxidation mechanism, has one end serving as a passage for inflowing air pollutants and the other end serving as a passage for the air pollutant purification unit, and A first state in which both passages of the second deoxidation treatment unit and the first deoxidation treatment unit are opened and both passages of the second deoxidation treatment unit are closed, and the first state Switching means selectively switchable to a second state in which both passages of the deoxidizing treatment unit are closed and both passages of the second deoxidizing treatment unit are opened; and in the first state, 33. A decompression means for decompressing the second deoxidation processing unit and decompressing the first deoxygenation processing unit in the second state.
The gas purifier according to the item. 34. In place of the depressurizing means, a heating means is provided for heating the second deoxidizing treatment section in the first state and heating the first deoxidizing treatment section in the second state. The gas purification device according to claim 33. 35. The heating device according to claim 33, further comprising heating means for heating the second deoxidizing treatment unit in the first state and for heating the first deoxidizing treatment unit in the second state. Gas purification device. 36. The gas purifying apparatus according to claim 30, wherein the deoxidizing mechanism after the deoxidizing treatment is adapted to be reduced by heat of the gas itself. 37. In place of the decompression means, a hydrogen storage alloy that stores hydrogen is provided, and hydrogen from the hydrogen storage alloy is supplied to the second deoxidation treatment unit in the first state, 34. Hydrogen supply means for supplying hydrogen from the hydrogen storage alloy to the first deoxygenation treatment section in this state is provided.
The gas purification device described. 38. The deoxidizing mechanism, an anode provided on the upstream side of the gas flow path, a cathode facing the anode, voltage applying means for applying a voltage between the anode and the cathode, 26. The gas purifier according to claim 25, which is provided on the cathode side between the anode and the cathode and is made of zinc or zinc oxide, or indium or indium oxide. 39. The gas purification apparatus according to claim 1, wherein the gas purification apparatus is attached to an exhaust system of an industrial engine.