JPH08257352A - Exhaust gas treatment device - Google Patents

Abstract

(57) [Summary] [Objective] To provide an exhaust gas treatment device that can accelerate the reaction of oxide gas in exhaust gas, increase the amount of by-products produced, and significantly improve energy efficiency. To do. [Composition] An electron beam generator 7a for irradiating an exhaust gas containing an oxide gas such as SOx or NOx with an electron beam 11.
A reactor 3a for reacting the oxide gas in the exhaust gas irradiated with the electron beam 11 to generate an aerosol,
A collecting section 12 for separating and collecting the aerosol generated in the reactor 3a, and a filler 13 made of at least one of a mesh material and a foil body is arranged in the reactor 3a. The filler 13 may be made of at least one material selected from aluminum (Al), titanium (Ti), carbon (C), boron (B), beryllium (Be) and their alloys.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an exhaust gas treatment apparatus for removing oxide gases such as SOx, NOx and CO ₂ contained in exhaust gas by electron beam irradiation, and in particular, the exhaust gas with greatly improved energy efficiency. Regarding a processing device.

[0002]

2. Description of the Related Art A large amount of sulfur oxides (SOx), nitrogen oxides (NOx) and carbon dioxide (C) are contained in exhaust gas discharged from thermal power plants, refuse incinerators and highway tunnels.
Oxide gas such as O ₂ ) is contained. Generally, it is practically difficult to simultaneously remove various oxide gases such as SOx, NOx and CO ₂ at the same time, and as shown in Table 1 below, the characteristics of each gas have been conventionally known. The oxide gas is removed by a treatment method according to the above.

[0003]

[Table 1]

As shown in Table 1, for example, the wet limestone gypsum method and the magnesium hydroxide method are widely used as the exhaust gas desulfurization technology. In the limestone gypsum method, water is removed after absorbing SOx in limestone in a slurry state, so that SOx in the exhaust gas becomes gypsum (CaSO ₄ .2H).
₂ O, CaSO ₄ ). Both the desulfurization rate and the dust removal rate of the exhaust gas in the gypsum method are 90% or more, which shows a high removal efficiency. On the other hand, in the magnesium hydroxide method, magnesium hydroxide is used as an absorbent, and SOx is harmless in the absorption process.
The exhaust gas converted into O ₄ ) and having SOx removed is discharged out of the system. The gypsum method and the magnesium hydroxide method are wet treatment methods using a liquid absorbent.

On the other hand, the selective catalytic reduction method used as the denitration technology is a dry process. In this selective catalytic reduction method, NOx is selectively reacted with ammonia on the catalyst,
Finally, NOx is reduced to harmless components such as N ₂ and H ₂ O.

On the other hand, CO ₂ removal techniques include a wet chemical absorption method and a dry catalytic hydrogenation method. In the chemical absorption method, a high concentration CO ₂ released from the amine is recovered by performing a regeneration treatment after the CO ₂ is sufficiently absorbed by the amine as the absorbent. In the catalytic hydrogenation method, CO ₂
Reacts with H ₂ on the catalyst surface to generate CO and methanol, and removes CO ₂ in the exhaust gas.

[0007] The various processing methods as described above, SOx, N
It is suitable as a method for treating exhaust gas containing Ox and CO ₂ respectively. However, in order to simultaneously remove all oxide gases from exhaust gas that contains various oxide gases in combination, it is necessary to construct a complicated treatment process that combines wet treatment and dry treatment. The construction cost becomes huge and it is not economical from the viewpoint of operating cost.

In addition to the above-described various treatment methods, a treatment process using an electron beam method for treating exhaust gas by irradiating the exhaust gas with an electron beam is disclosed in JP-A-1-155935.
No. 6,086,045.

FIG. 5 is a system diagram showing the structure of a conventional exhaust gas treating apparatus using the electron beam method. This exhaust gas treatment device is configured by connecting a boiler 1 which is an exhaust gas generation source, a cooling tower 2, a reactor 3, an electric dust collector 4 and a chimney 5 in series with an exhaust gas conduit 6, and an upper portion of the reactor 3. Has
The reactor 3 is equipped with an electron beam generator 7 for irradiating an electron beam.

Exhaust gas containing SOx and NOx discharged from the boiler 1 which is an exhaust gas source is exhaust gas conduit 6
Is introduced into the cooling tower 2 where the exhaust gas is cooled by the cooling water pipe 8
It is cooled to a temperature above the dew point and below 100 ° C. by the cooling water sprinkled from above. Further, in the exhaust gas conduit on the secondary side of the cooling tower 2, ammonia supplied via the flow rate control valve 9 is added to the exhaust gas. After that, the exhaust gas is introduced into the electron beam irradiation section in the reactor 3 and is irradiated with the electron beam emitted from the electron beam generator 7. SOx and NOx in the exhaust gas irradiated with the electron beam react with ammonia and change to ammonium sulfate and ammonium nitrate, respectively.

That is, when the exhaust gas is irradiated with an electron beam, components such as nitrogen, oxygen, water and carbon dioxide gas in the exhaust gas are radiolytically decomposed to generate active radicals such as CH, O, HO ₂ and N. Since these radicals are extremely reactive, they easily react with the oxide gas. Then, SOx and NOx in the exhaust gas easily react with radicals and are converted into sulfuric acid and nitric acid. Further, the generated sulfuric acid or nitric acid reacts with ammonia added to the exhaust gas to finally become powdery ammonium sulfate (ammonium sulfate) or ammonium nitrate (ammonium nitrate).

The ammonium sulfate and ammonium nitrate thus produced in the exhaust gas are separated and removed from the exhaust gas in the electrostatic precipitator 4, and the separated ammonium sulfate and ammonium nitrate are recovered as by-products through the discharge pipe 10. On the other hand, the clean exhaust gas from which the oxide gas has been removed is released into the atmosphere via the chimney 5.

The exhaust gas treatment apparatus using the electron beam method has the advantages that SOx and NOx can be treated at the same time, and that ammonium sulfate and ammonium nitrate, which are useful as by-products, can be obtained. Furthermore, since it is a dry process, it does not require further secondary treatment of wastewater, such as a wet process, and has a feature that the equipment configuration is simple and the construction cost is low. Furthermore, CO ₂ may be removed at the same time by using an appropriate hydrogen source, which is an advantageous treatment method.

[0014]

However, in the conventional exhaust gas treatment apparatus utilizing the above electron beam method,
There was a problem that the amount of reaction products was smaller than the amount of input electric power and the energy efficiency was low. That is, as the accelerating voltage of the electron beam is increased, the amount of radicals generated is increased and the reaction with the oxide gas is promoted. However, a high accelerating voltage of at least 600 kV was required for the above reaction to proceed. That is, since the power consumption for generating the electron beam is large, in order to utilize this energy more effectively, it is possible to promote the gas reaction and further increase the production amount of useful by-products such as ammonium sulfate and ammonium nitrate. It was a technical issue.

The present invention has been made to solve the above problems, and can accelerate the reaction of oxide gas in exhaust gas, increase the amount of by-products produced, and significantly improve energy efficiency. It is an object of the present invention to provide an exhaust gas treatment device capable of achieving the above.

[0016]

In order to achieve the above object, the inventors of the present invention filled various filling materials into the electron beam irradiation section in the reactor, while controlling the depth of the electron beam irradiation section and the material of the filling material. Exhaust gas treatment was carried out with various changes, and the effects of the above factors on the amount of reaction products and energy efficiency were compared and examined. As a result, in particular, a filler such as a metal mesh material or metal foil formed by braiding metal wires is arranged in the electron beam irradiation part of the reactor, or the depth of the electron beam irradiation part is set within the effective range of electron beam irradiation. It was found that the reaction efficiency of the oxide gas in the exhaust gas can be significantly increased when set to a small value. In addition, the filler is Al
It was found that the energy efficiency of the entire device can be improved by increasing the width of the electron beam irradiation part in the reactor and increasing the reaction efficiency even when the flow velocity of the exhaust gas is reduced, while forming it with a metal material such as Ti and Ti. was gotten. The present invention has been completed based on the above findings.

That is, the exhaust gas treating apparatus according to the present invention is
An electron beam generator for irradiating an exhaust gas containing an oxide gas such as SOx or NOx with an electron beam, a reactor for reacting the oxide gas in the exhaust gas irradiated with the electron beam to generate an aerosol, A collecting part for separating and collecting the aerosol generated in the reactor, and a filler made of at least one of a mesh material and a foil body is arranged in the reactor.

Further, the filler is at least 1 selected from aluminum (Al), titanium (Ti), carbon (C), boron (B), beryllium (Be) and alloys thereof.
It may be composed of seed materials.

Further, when the accelerating voltage of the electron beam is V kilovolt (kV), the depth of the irradiation portion of the electron beam in the reactor is set within 20 × V ^1.55 cm.

In the exhaust gas treating apparatus according to the present invention,
Since the filler made of at least one of the mesh material and the foil body is arranged in the reactor, the reaction of the oxide gas in the exhaust gas is promoted and the amount of the reaction product can be greatly increased.

FIG. 1 (a) is a schematic diagram for explaining the reaction mechanism in the gas phase, and FIG. 1 (b) is a schematic diagram for explaining the reaction mechanism in the solid wall. In a conventional exhaust gas treating apparatus in which a solid product as a by-product is formed only by a reaction in a gas phase without providing a filler,
As shown in (a), collision of a large number of gas molecules is a prerequisite for the reaction to proceed. However, in the initial stage of production of the solid product, the solid product produced by collision / reaction of gas molecules floats in the gas phase while maintaining a very high energy level. There is a high rate of separation before the next collision / reaction of gas molecules occurs. Therefore, the collision / reaction of a large amount of gas molecules continuously occurs at a small rate, and there is a limit in obtaining by-products such as ammonium sulfate and ammonium nitrate only by the reaction in the gas phase.

On the other hand, in the exhaust gas treating apparatus of the present invention in which the packing material is arranged in the reactor, the surface of the solid wall as the packing material becomes the reaction product nuclei of the solid product as shown in FIG. 1 (b). The solid product does not move from the reaction product nucleus, and the stability after production is excellent. Moreover, since the gas is easily adsorbed on the surface of the solid wall, the collision and reaction of the gases smoothly proceed on the surface of the solid wall.

Further, as the surface area of the solid wall per unit volume of the reactor is larger, the reaction product nuclei naturally increase, and the amount of the solid product produced can be increased. Therefore, in addition to the inner wall surface of the reactor, it is important to secure a large surface area of the solid wall by disposing a filler such as a mesh material braided with a metal wire in the electron beam irradiation portion of the reactor. .

Here, the effect of disposing the filler will be described. FIG. 2 shows that the surface area of the mesh material per unit volume of the reactor is a by-product when the exhaust gas treatment is performed by filling the mesh material made of stainless steel (SUS304) into the reactor with various arrangement densities. It is a graph which shows the result of having measured the influence on quantity.

As is clear from the results shown in FIG. 2, by disposing the metal mesh material as the filler, the amount of the by-product produced is significantly increased as compared with the case of the conventional apparatus in which the metal mesh material is not disposed. be able to. In addition, the amount of by-products produced increases in proportion to the surface area of the mesh material per unit volume of the reactor. Especially, the surface area ratio of the mesh material is 2500 m ² / m
By setting it to ³ or more, it is possible to increase the production amount of the by-product by a factor of 2 or more as compared with the case of the conventional device in which the mesh material is not arranged. Therefore, in order to increase the amount of by-products produced, it is particularly effective to dispose a filler such as a metal mesh material in the electron beam irradiation section of the reactor and to increase the surface area of the filler. is there.

The material constituting the filler is selected from the viewpoints of corrosion resistance, workability, price, etc., but Al, Ti,
Preference is given to using C, B, Be and their alloys. In particular, by forming the filler with a light metal having good electron permeability, it is possible to reduce the amount of electron beams that are absorbed by the filler itself, which is a reaction generation nucleus, and do not contribute to the gas reaction, and to improve energy efficiency. Is extremely effective at.

Here, the effect of the type of material forming the filler on the amount of by-products produced will be described with reference to FIG. FIG. 3 shows a metal mesh material as a filler made of Al, T
i, Pt, C, Zr, Mo, stainless steel (SUS30
It is a graph which shows the production amount of a by-product when it comprises in 4) and each exhaust-gas treatment is implemented. The production amount of the by-product was relatively evaluated based on the case where the metal mesh material was not provided.

As shown in FIG. 3, when the metal mesh material formed of Al or Ti is arranged, the amount of by-products produced is about the same as that when the metal mesh material made of stainless steel (SUS304) is used. It has increased 1.4 times. Also, Pt,
The amount of by-products produced when the metal mesh material made of C, Zr, and Mo was used was about 1.2 times that when the stainless steel mesh material was used. Therefore, in order to improve the reaction efficiency and increase the yield of the by-product, it is preferable that the filler serving as a reaction product nucleus is formed of Al, Ti, C, B, Be and its alloy.

Next, the reason for limiting the depth of the electron beam irradiation portion in the reactor will be described. The energy of the electron beam with which the exhaust gas is irradiated is rapidly attenuated when passing through the exhaust gas, and the energy for generating radicals usually disappears when reaching a predetermined depth from the irradiation direction. The depth at which the energy of such an electron beam becomes zero, so-called range, is calculated from the electron stopping power. Table 2 below shows the calculation results of the range when the acceleration voltage is 10 to 1000 kV.

[0030]

[Table 2]

The relationship between the acceleration voltage V and the range D shown in Table 2 above is expressed by the following approximate expression.

[0032]

[Equation 1] D = 20 × V ^{1.55 The} above range D is the depth at which the electron beam irradiation is effectively exhibited, and the depth of the electron beam irradiation part of the reactor in the exhaust gas treatment apparatus is set to be equal to or less than the above range value. By setting, the reaction of the oxide gas will proceed in the entire exhaust gas passage in the reactor. Therefore, the reaction efficiency of the entire apparatus can be increased.

A general-purpose electrostatic precipitator or a mist separator can be used as a recovery unit for separating and recovering an aerosol such as a solid product generated by the reaction of oxide gas.

[0034]

According to the exhaust gas treating apparatus having the above-mentioned structure, the packing material composed of at least one of the mesh material and the foil body is arranged in the reactor, and the surface of the packing material becomes a reaction product nucleus to be oxidized. Since the reaction of the product gas is promoted, the amount of the reaction product can be significantly increased.

The filler is made of Al, Ti, C, B, Be.
And by forming with a material having good electron transparency such as those alloys, it will be absorbed by the filler itself,
Since the amount of electron beams that do not contribute to the reaction can be reduced, energy efficiency can be significantly improved.

Further, the depth of the electron beam irradiation section in the reactor is set to 20 × V which is the effective range of the electron beam irradiation.
By setting it within ^1.55 cm, the reaction of the oxide gas can proceed in the entire reactor, and the reaction efficiency of the entire apparatus can be enhanced.

[0037]

An embodiment of the present invention will now be described with reference to the accompanying drawings. FIG. 4 is a perspective view showing an embodiment of the exhaust gas treating apparatus according to the present invention using the electron beam irradiation method.

That is, the exhaust gas treating apparatus according to the present embodiment includes an electron beam generator 7a for irradiating an exhaust gas containing an oxide gas such as SOx or NOx with an electron beam 11 and an exhaust gas irradiated with the electron beam 11. A reactor 3a for reacting an oxide gas to generate an aerosol, and an electrostatic precipitator 12 as a recovery unit for separating and recovering the aerosol generated in the reactor 3a are provided, and a filler 13 made of a mesh material or a foil body. Is arranged in the reactor 3a.

Further, the reactor 3a is formed in a box shape having a quadrangular cross section, and is arranged in the middle of the exhaust gas conduit 6 led out from the exhaust gas generation source.

The exhaust gas fed from the exhaust gas source such as a boiler via the exhaust gas conduit 6 is introduced into the reactor 3a. On the other hand, the electron beam (EB) 11 emitted from the electron beam generator 7a is applied to the exhaust gas through the electron transmission window 14 that covers the upper surface of the reactor 3a. At this time, reactor 3a
Filling material 13 such as a metal mesh material or a foil body disposed inside
Becomes the reaction product nucleus, and the SO
An oxide gas such as x, NOx, CO ₂ is taken in, and a solid product as shown in FIG. 1B is formed by the reaction. The solid product grows further as the reaction progresses,
The filler 13 is separated from the surface by the flow of the exhaust gas.
The separated solid product becomes an aerosol and is sent to the electrostatic precipitator 12 as a recovery unit arranged on the secondary side of the reactor 3a, where it is separated and recovered as a by-product. On the other hand, the clean exhaust gas from which the oxide gas has been removed is discharged out of the system.

Further, the solid product is peeled off from the surface of the filler 13 such as a mesh material or a foil, so that the filler 13
The surface of is regenerated cleanly and becomes a new reaction product nucleus to continue the reaction of removing the oxide gas.

According to the exhaust gas treating apparatus of this embodiment,
The filling material 13 made of a mesh material or a foil body is attached to the reactor 3a.
Since the surface of the filler 13 serves as a reaction product nucleus to promote the reaction of the oxide gas, the amount of the reaction product can be significantly increased.

Further, by setting the depth of the electron beam irradiation portion of the reactor 3a to a small value in accordance with the effective range (range) of the electron beam irradiation, the oxide gas is entirely supplied to the electron beam irradiation portion in the reactor 3a. Was able to proceed, and the reaction efficiency of the entire apparatus could be increased.

Further, by adjusting the cross-sectional shape of the reactor so that the flow rate of the exhaust gas decreases in the reactor and widening the width of the electron beam irradiation portion, the reaction efficiency could be similarly enhanced.

Next, in the exhaust gas treating apparatus according to the above-mentioned embodiment, the material, size and form of the filler, the surface area per unit volume, and the cross-sectional shape of the reactor (electron beam (EB) irradiation part) are shown in Table 3 as parameters. Example 1 by changing as shown
The exhaust gas treatment device according to any one of claims 1 to 6 was configured.

That is, in Example 1, an Al foil having a thickness of 0.005 mm was used, and the surface area per unit volume of the reactor was 10,000.
It was arranged so as to be m ² / m ³ . In Examples 2 to 3, a mesh material formed by braiding Al wires having a diameter of 0.3 mm (Example 2) and a diameter of 1.0 mm (Example 3) has a surface area ratio of 10000 m ² / m ^3. Arranged. Further, in Example 4, a mesh material formed of an Al wire having a diameter of 1.0 mm was arranged in the reactor so that the surface area ratio was 1000 m ² / m ³ . In Examples 5 and 6, a mesh material formed by braiding a SUS wire having a diameter of 1.0 mm was arranged in the reactor so that the surface area ratio was 1000 m ² / m ³ .

Further, in Examples 1 to 5, the ratio of the height H to the width W of the electron beam (EB) irradiation portion of the reactor was 0.5:
It was set so as to have a flat sectional shape so as to be 2.
On the other hand, the square shape was set so that the ratio of the height H to the width W of the electron beam irradiation part of the reactor in Example 6 and the conventional example was 1: 1.

Further, as a conventional example, an exhaust gas treating apparatus was also formed in which a filler such as a metal mesh material was not disposed at all, and the electron beam irradiation section had a square cross section.

Using the exhaust gas treating apparatuses of Examples 1 to 6 and the conventional example formed as described above, the boiler exhaust gas is treated, the oxide gas in the exhaust gas is fixed by the reaction, and separated and recovered as a by-product. Table 3 below shows the measured amount
The results shown in are obtained. The production amount of by-products was represented as a reference value 1 in the case of the conventional example and as a relative value in the cases of Examples 1 to 6.

[0050]

[Table 3]

As is clear from the results shown in Table 3, in the exhaust gas treating apparatus according to Example 6 in which the electron beam irradiation section has the conventional shape and the mesh material is provided in the reactor, the comparison is made with the conventional example. As a result, the amount of by-products produced increased 10 times. That is, it has been found that the reaction efficiency can be significantly improved only by providing the filler.

Further, as is clear from comparison with Examples 5 to 6, the apparatus of Example 5 in which the electron beam irradiation section has a flat rectangular cross-section even when the filler having the same specifications is provided. In comparison with the apparatus of Example 6 having a square shape, the by-product obtained was twice as large, and the amount of this by-product produced was 20 times that of the conventional example. That is, it has been found that the reaction efficiency is significantly improved when the height when the cross-sectional area of the electron beam irradiation portion is set to be the same is set smaller according to the effective range of the electron beam.

Further, as is clear from comparison with Examples 4 to 5, when the surface area of the mesh material per unit volume is set to be the same, Example 4 in which the mesh material is made of Al is made of SUS. The amount of by-products produced was 1.5 times that of Example 5 in which the mesh material was used. This production amount was 30 times that of the conventional example. That is, it has been found that a light metal such as Al having a good electron transmissivity is more advantageous as a material forming the filler.

Further, as is clear from the comparison with Examples 3 to 4, the surface area of the mesh material per unit volume was calculated as in Example 4
According to the apparatus of Example 3 set to 10 times as compared with
The amount of by-products produced has more than doubled. This production amount was 70 times that of the conventional example. That is, it was confirmed that the reaction product nuclei increased as the surface area of the mesh material increased, and the reaction of the oxide gas proceeded smoothly.

Further, as is clear from comparison with Examples 2 to 3, in the case where the surface area of the mesh material was set to be the same, Example 2 in which the wire diameter of the Al wire constituting the mesh material was made smaller Compared with Example 3 using a thick wire, the amount of by-products produced increased by a factor of 1.5. This generation amount is 100 times that of the conventional example.

As is clear from the comparison with Examples 1 and 2, compared with the case of the apparatus of Example 2 in which the mesh material formed by braiding Al wires was arranged, the example in which Al foil was arranged was used. The device of Example 1 produced twice as much by-product. This production amount is equivalent to 200 times that of the conventional example. That is, it was found that the foil body can obtain higher reaction efficiency as compared with the mesh material.

In the above embodiments, Al and SU
An example using a filler such as a mesh material or a foil formed in S304 is shown, but in addition to the above, Ti, C, B, B
It has been proved that similarly high reaction efficiency can be obtained when using the filler formed from e and the alloys thereof, as compared with the conventional example.

According to the exhaust gas treating apparatus of this embodiment,
Since the filler such as the metal mesh material or the metal foil formed by braiding the metal wire is arranged in the electron beam irradiation part of the reactor, the reaction efficiency of the oxide gas in the exhaust gas is increased and the by-product We were able to significantly increase the amount of recovery.

Further, a light metal such as Al is used as a constituent material of the filling material, the depth of the electron beam irradiation portion of the reactor is set to be short according to the effective range of the electron beam irradiation, and the width of the irradiation portion is wide. Set the flow velocity of the exhaust gas in the irradiation unit,
By lowering the flow velocity in the exhaust gas pipe, the gas reaction can be promoted without adding excessive energy, and the amount of by-products produced can be increased, resulting in an exhaust gas treatment device with greatly improved energy efficiency. Was obtained.

[0060]

As described above, according to the exhaust gas treating apparatus of the present invention, the filler composed of at least one of the mesh material and the foil is disposed in the reactor, and the surface of the filler is The reaction product nucleus serves to accelerate the reaction of the oxide gas, so that the amount of the reaction product can be significantly increased.

The filler is made of Al, Ti, C, B, Be.
And by forming with a material having good electron transparency such as those alloys, it will be absorbed by the filler itself,
Since the amount of electron beams that do not contribute to the reaction can be reduced, energy efficiency can be significantly improved.

Further, the depth of the electron beam irradiation part in the reactor is set to 20 × V which is the effective range of the electron beam irradiation.
By setting it within ^1.55 cm, the reaction of the oxide gas can proceed in the entire reactor, and the reaction efficiency of the entire apparatus can be enhanced.

[Brief description of drawings]

FIG. 1A is a schematic diagram illustrating a reaction mechanism in a gas phase, and FIG. 1B is a schematic diagram illustrating a reaction mechanism in a solid wall.

[Fig. 2] Filling material (mesh material) per unit volume of the reactor
Is a graph showing the relationship between the surface area of and the production amount of by-products.

FIG. 3 is a graph showing the relationship between the filler material and the amount of by-products produced.

FIG. 4 is a partially cutaway perspective view showing an embodiment of an exhaust gas treating apparatus according to the present invention.

FIG. 5 is a system diagram showing a configuration of a conventional exhaust gas treatment device.

[Explanation of symbols]

 1 Boiler 2 Cooling Tower 3,3a Reactor 4 Electrostatic Precipitator 5 Chimney 6 Exhaust Gas Pipeline 7,7a Electron Beam Generator 8 Cooling Water Pipe 9 Flow Control Valve 10 Discharge Pipe 11 Electron Beam (EB) 12 Recovery Part (Electrostatic Precipitator) 13 Filling Material (mesh material, foil body) 14 Electron transparent window

─────────────────────────────────────────────────── ─── Continuation of the front page (51) Int.Cl. ⁶ Identification code Internal reference number FI technical display location B01J 19/12

Claims (3)

[Claims] 1. An electron beam generator for irradiating an exhaust gas containing an oxide gas such as SOx and NOx with an electron beam, and an oxide gas in the exhaust gas irradiated with the electron beam for reacting to generate an aerosol. Exhaust gas treatment characterized by comprising a reactor and a recovery part for separating and recovering the aerosol generated in the reactor, and a filler comprising at least one of a mesh material and a foil is disposed in the reactor. apparatus. 2. The filler is at least 1 selected from aluminum (Al), titanium (Ti), carbon (C), boron (B), beryllium (Be) and their alloys.
The exhaust gas treatment apparatus according to claim 1, wherein the exhaust gas treatment apparatus is composed of various kinds of materials. 3. The depth of the irradiation portion of the electron beam in the reactor is set within 20 × V ^1.55 cm when the acceleration voltage of the electron beam is V kilovolt (kV). The exhaust gas treatment device according to 1.