JPH07260129A - Flue gas processing device - Google Patents

Abstract

PURPOSE:To uniformly react a flue gas with electrons while electrons are not extinguished prior to reaction with NOx, and SOx, by applying an electron beams in substantially the same direction as the direction of flow of the flue gas, in the opposite direction to that, or at angle to that. CONSTITUTION:An electron generating device comprising an electron gun 1, an accelerating tube 2, a scanner 3, a vacuum duct 4 and a magnetic field generating device 5 for bending electron orbits makes use of a bent portion of a flue gas duct 6 to be mounted in a direction, in which a flue gas passes. Thus the magnetic field generating device 5 bends electron orbits to apply an electron beam in the longitudinal direction of the flue gas duct 6 or in substantially the same direction as the direction of flow 7 of the flue gas, or at an angle to the flue gas. Accordingly, electrons fly in substantially the same direction as the direction of flow 7 of the flue gas, or at an angle to the length of the flue gas duct 6 whereby the area 8 irradiated with the electron beam is made large as compared with the prior art and electrons are evenly existent in both of upper and lower portions of the flue gas duct 6 to reduce variation in reaction.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an exhaust gas treating apparatus for removing NOx and SOx by irradiating an electron beam.

[0002]

2. Description of the Related Art NOx and SOx are generated by combustion or incomplete combustion during an internal combustion period of a gas turbine, a diesel engine, a gasoline engine, a gas engine and the like. The damage caused by acid rain caused by smoke exhaust containing NOx and SOx has become a serious problem not only in Western countries but also in Japan.

As a method of simultaneously processing NOx and SOx, NOx and SOx are irradiated with an electron beam to emit NOx and SOx.
x is oxidized to form nitric acid and sulfuric acid, which is further reacted with added ammonia to recover ammonium nitrate and ammonium sulfate.
There is a method of removing SOx. Conventionally, an electron beam irradiation device, which is a part of the constituent device of this exhaust gas treatment device, is attached so that the electron beam is vertically irradiated to the flow of the exhaust gas.

[0004]

As described above, when the electron beam is irradiated perpendicularly to the flow of exhaust gas, NOx, S
There are electrons that collide with or disappear at the bottom of the smoke exhaust duct without reacting with Ox, and the reaction cannot be said to be performed efficiently.

To solve this, for example, the diameter of the smoke exhaust duct may be made very large. However, the cost and space increase due to the increase of the smoke exhaust duct, and electrons reach the vicinity of the bottom of the duct. Since the probability of doing so becomes small, the exhaust gas flowing near the bottom of the smoke exhaust duct flows without being processed.

According to the present invention, the electrons do not disappear before reacting with NOx and SOx, and the exhaust gas flowing in the smoke exhaust duct, including the exhaust gas flowing through the bottom of the smoke exhaust duct, reacts with the electrons evenly. It is to provide an exhaust gas treatment device.

[0007]

In order to achieve the above object, the present invention provides an electron beam for NOx and SOx in an exhaust duct.
In an exhaust gas treatment device for removing NOx and SOx by irradiating contained exhaust gas, an electron beam is irradiated in substantially the same direction as the exhaust gas flow direction, in the opposite direction, or in an oblique direction. .

[0008]

In the exhaust gas treating apparatus according to the invention, the exhaust gas treating apparatus for removing NOx and SOx by irradiating the exhaust gas containing NOx and SOx in the exhaust duct with the electron beam is almost in the flow direction of the gas. By irradiating the electron beam in the same direction, almost the opposite direction, or the oblique direction, it becomes possible to react with the electron without hitting the exhaust duct and disappearing before reacting with NOx and SOx.

[0009]

【Example】

(Structure of Embodiment) FIG. 1 is a first embodiment of an exhaust gas treating apparatus according to the present invention. As shown in FIG. 1, an electron gun 1, an accelerating tube 2, a scanner 3, a vacuum duct 4, and an electron orbit are bent. The electron generator including the magnetic field generator 5 is attached in the direction in which the exhaust gas flows by using the bent portion of the smoke exhaust duct 6, the trajectory of the electrons is bent by the magnetic field generator 5, and the length direction of the smoke exhaust duct 6, that is, the exhaust gas. The electron beam is radiated in a direction substantially the same as the circulation direction 7 of S.

When an electron beam is irradiated by such an exhaust gas treating apparatus, the electrons fly almost in the same direction with respect to the length of the smoke exhaust duct 6 as shown in FIG. 2, and obliquely. Therefore, as shown in FIG. It can be seen that the electron beam irradiation range 8 is wider than the electron beam irradiation range 8 of the conventional exhaust gas treatment device shown in FIGS. Further, in the conventional exhaust gas treatment device, the smoke exhaust duct 6
In the vicinity of the bottom of the smoke exhaust duct 5, the reaction efficiency of the exhaust gas flowing near the bottom of the smoke exhaust duct 5 with electrons becomes lower than in the top of the smoke exhaust duct, but as shown in FIG. Since the electrons are evenly present in the upper part and the lower part of the smoke exhaust duct 6, the variation of the reaction is small.

As described above, in this embodiment, the electrons emitted from the electron generator do not disappear before reacting with NOx and SOx, and the exhaust duct including the exhaust gas flowing through the bottom of the exhaust duct is also included. An exhaust gas treatment device capable of uniformly reacting exhaust gas flowing inside with electrons can be provided.

(Other Embodiments) FIG. 4 shows a second embodiment of the exhaust gas treating apparatus according to the present invention, and as shown in FIG. 4, includes an electron gun 1, an accelerating tube 2, a scanner 3 and a vacuum duct 4. It is composed of an electron generator, a magnetic field generator 5 that bends the trajectory of electrons, and a support 9 that supports the magnetic field generator 5. The electron beam has its orbit bent by the magnetic field generator 5 and is irradiated in substantially the same direction as the length direction of the smoke exhaust duct 6 and in an oblique direction.
When an electron beam is irradiated by such an exhaust gas treating apparatus, electrons fly in substantially the same direction as the length of the smoke exhaust duct 6 and in an oblique direction as shown in FIG.
As a result, it can be seen that the electron beam irradiation range 8 is wider than the electron beam irradiation range 8 of the conventional exhaust gas treatment apparatus shown in FIGS. Further, in the conventional exhaust gas treatment apparatus, the concentration of electrons is low near the bottom of the smoke exhaust duct 6, and the reaction efficiency of the exhaust gas flowing near the bottom of the smoke exhaust duct 6 with electrons is lower than that in the upper part of the smoke exhaust duct. As shown in FIG. 6, in the exhaust gas device according to the present invention, since the electrons are evenly present in the upper part and the lower part of the smoke exhaust duct 6, the variation of the reaction is small.

FIG. 7 shows a third embodiment of the exhaust gas treating apparatus according to the present invention.
In this embodiment, as shown in FIG. 7, the electron gun 1, the acceleration tube 2,
By the electron generator configured by the scanner 3, the vacuum duct 4, and the magnetic field generator 5 that bends the trajectory of electrons,
An electron beam is irradiated in an oblique direction with respect to the exhaust gas flow direction 6 of the smoke exhaust duct 6. When an electron beam is irradiated by such an exhaust gas treatment device, electrons are emitted from the smoke exhaust duct 6 as shown in FIG.
It can be seen that the electron beam irradiation range 8 is wider than the electron beam irradiation range 8 of the conventional exhaust gas treatment apparatus of FIG.

FIG. 9 is a D fourth embodiment of an exhaust gas treating apparatus according to the present invention. As shown in FIG. 9, an exhaust gas is emitted from an electron generating apparatus including an electron gun 1, an accelerating tube 2, a scanner 3 and a vacuum duct 4. The electron beam is emitted obliquely with respect to the lengthwise direction of the flue gas exhaust duct 6. When an electron beam is irradiated by such an exhaust gas treatment device, electrons fly obliquely with respect to the length of the smoke exhaust duct 6 as shown in FIG. 9, so that the electron beam irradiation range 8 is the same as that of the conventional exhaust gas treatment device of FIG. Electron beam irradiation range 8
You can see that it is wider than.

[0015]

As described above, according to the present invention, the electrons emitted from the electron generator do not disappear before reacting with NOx and SOx, and the exhaust gas flowing through the bottom of the smoke exhaust duct is also removed. In addition, it is possible to provide an exhaust gas treatment device that can uniformly react the exhaust gas flowing in the smoke exhaust duct with the electrons.

[Brief description of drawings]

FIG. 1 is a bird's-eye view showing a part of the configuration of a first embodiment of an exhaust gas treatment apparatus according to the present invention.

FIG. 2 is a side view showing a part of the configuration of the first embodiment of the exhaust gas treating apparatus according to the present invention.

FIG. 3 is a plan view showing a part of the configuration of the first embodiment of the exhaust gas treating apparatus according to the present invention.

FIG. 4 is a bird's-eye view showing a part of the configuration of the second embodiment of the exhaust gas treating apparatus according to the present invention.

FIG. 5 is a bird's-eye view showing a part of the configuration of the second embodiment of the exhaust gas treatment system according to the present invention.

FIG. 6 is a side view showing a part of the configuration of the second embodiment of the exhaust gas treatment system according to the present invention.

FIG. 7 is a bird's-eye view showing a part of the configuration of the third embodiment of the exhaust gas treatment system according to the present invention.

FIG. 8 is a plan view showing a part of the configuration of a third embodiment of the exhaust gas treatment system according to the present invention.

FIG. 9 is a side view showing a part of the configuration of a fourth embodiment of the exhaust gas treatment system according to the present invention.

FIG. 10 is a bird's-eye view showing a part of a configuration example of a conventional exhaust gas treatment device.

FIG. 11 is a side view showing a part of a configuration example of a conventional exhaust gas treatment device.

FIG. 12 is a plan view showing a part of a configuration example of a conventional exhaust gas treatment device.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 ... Electron gun 2 ... Acceleration tube 3 ... Scanner 4 ... Vacuum duct 5 ... Magnetic field generator 6 ... Smoke exhaust duct 7 ... Exhaust gas flow direction 8 ... Electron beam irradiation range 9 ... Support stand

Claims (4)

[Claims] 1. An electron beam for NOx and SOx in an exhaust duct
In an exhaust gas treatment device for decomposing NOx and SOx by irradiating the contained exhaust gas, in the bent portion of the smoke exhaust duct, the length direction of the smoke exhaust duct, that is, substantially the same direction as the exhaust gas flow direction, or almost the opposite direction Alternatively, an exhaust gas treatment device is characterized in that an electron generator for irradiating an electron beam in an oblique direction is attached. 2. An electron beam for NOx and SOx in an exhaust duct
In an exhaust gas treatment device that decomposes NOx and SOx by irradiating the contained exhaust gas, the electron beam is bent by a magnetic field generator installed inside or outside a vacuum duct through which the electron beam passes, and the direction is almost the same as the exhaust gas flow direction. The exhaust gas treatment device is characterized by irradiating an electron beam in a substantially opposite direction or in an oblique direction. 3. An electron beam for NOx and SOx in an exhaust duct
An exhaust gas treatment apparatus for removing NOx and SOx by irradiating the contained exhaust gas, wherein the exhaust gas treatment apparatus irradiates an electron beam in a direction oblique to the flow direction of the exhaust gas. 4. An electron beam for NOx and SOx in an exhaust duct
In the exhaust gas treatment device for decomposing NOx and SOx by irradiating the contained exhaust gas, there are some electron generators that irradiate the electron beam in substantially the same direction as the exhaust gas flow direction, almost in the opposite direction, or obliquely. An exhaust gas treatment device that is installed in combination.