JP2002177734A - Ultra-short pulse high voltage applying-type gas cleaning apparatus - Google Patents

Abstract

PROBLEM TO BE SOLVED: To stably operate and obtain high cleaning performance without causing generation of sparks or the like even when an electric discharge inhibitory substance, such as moisture, exists in an exhaust gas while securing discharge electric power with which gaseous contaminants in the exhaust gas can be sufficiently cleaned in an ultra-short pulse high voltage applying-type gas cleaning apparatus. SOLUTION: When corona discharge is generated in a corona discharge system 8 having a discharge distance d, the discharge electric power to be charged per one ultra-short pulse high voltage is set to be >=d/200 (J) and <=d/5 (J) per unit length of corona discharge line and at least 90% of the discharge electric power is charged within 100 d (nanosecond) after applying pulse and thereafter the residual voltage in the corona discharge system 8 is allowed to be <=5 d (kV).

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

The present invention relates to nitrogen oxides, sulfur oxides, dioxins, volatile organic substances, volatile odors, and odors contained in exhaust gas from waste incineration facilities, boilers, sintering furnaces, painting booths, wastewater treatment facilities, and the like. The present invention relates to an ultra-short pulse high-voltage electrified gas purifier for removing gaseous pollutants such as.

[0002]

2. Description of the Related Art In a conventional ultrashort pulse high-voltage electrified gas purifier, the pulse width of a high-voltage ultrashort pulse power supply in the purifier is 1 μs or less, and the gas density at 0 ° C. and 1 atm is 1. When the relative density of the gas at the temperature and pressure at which the gas is purified is d, the peak voltage Vp of the extremely short pulse high voltage to be applied is changed between the corona discharge electrode and the counter electrode by chemical activity. and said corona discharge electrode showing the value of the critical for allowing generating a large amount of seeds (radical), and a distance mean electric field strength between the counter electrode and Ep _0, Ep ₀
= 8d (kV / cm) or more (Japanese Patent No. 2649340). However, the corona discharge generated by applying a pulse is inhibited by the influence of the composition of the exhaust gas, particularly, the moisture concentration in the exhaust gas, and the electric power injected into the gas by the discharge decreases.

Further, when the pulse voltage is increased to increase the discharge power, a spark is generated at the remaining voltage, and the discharge power cannot be increased after all.

[0004] As a result, sufficient discharge power for treating gaseous pollutants by corona discharge cannot be injected, resulting in deterioration of treatment performance.

[0005] In particular, when a means for preventing frequent occurrence of sparks is not provided, the spark becomes more intense, and a spark is generated every time a pulse is applied, so that operation becomes impossible.

In addition, when the gas to be treated is directly introduced into the discharge section, the processing performance cannot be obtained unless the discharge power is kept large, and the running cost such as electricity cost is high.

[0007] In addition, by increasing the number of pulse applications to increase the amount of processing gas per unit volume of the corona electrode-based reactor, the residence time (passage time) of the exhaust gas in the reactor can be shortened. Due to the short time, the oxidative decomposition reaction may not proceed sufficiently depending on the type of gaseous pollutant.

[0008]

SUMMARY OF THE INVENTION It is an object of the present invention to provide a gas purifying apparatus for an ultra-short pulse high-voltage power supply system as described above, while ensuring discharge power sufficient to purify gaseous pollutants in exhaust gas. It is intended to operate stably without generating a spark or the like even if a discharge inhibiting substance such as moisture exists, and to obtain high purification performance.

Another object is to increase the discharge voltage applied to the exhaust gas to a critical point which is not hindered by sparks generated by the voltage remaining in the exhaust gas purifying apparatus, and to reduce gaseous pollutants by corona discharge. So that sufficient discharge power can be injected for the treatment.

Another object of the present invention is to provide an ultra-short pulse high-voltage charged gas purifying apparatus which operates by a spark generated every time the pulse high voltage is applied, without providing a spark preventing device. So that there is no fear of disabling.

Still another object is to control the temperature of the exhaust gas, perform pretreatment, and add an oxidizing agent to introduce the exhaust gas to be treated into the discharge section, so that the discharge power injected into the unit exhaust gas flow rate can be sufficiently reduced. That is, the running cost is reduced by obtaining a high processing performance.

[0012]

An ultra-short pulse high-voltage electrified gas purifying apparatus according to the present invention comprises a gas inlet for introducing exhaust gas before purification and a gas outlet for discharging exhaust gas after purification. In the gas passage in the provided casing, a corona discharge electrode and a counter electrode facing the corona discharge electrode are arranged insulated from each other,
A corona electrode-based reactor equipped with a bushing for supplying power to the corona discharge electrode from outside the casing, and an extremely short pulse high voltage having a very short pulse width between the corona discharge electrode and the counter electrode. In a gas purification apparatus provided with a high-voltage ultrashort pulse electric wire, when a distance (discharge distance) between the corona discharge electrode and the counter electrode is d (cm), a corona discharge is generated to generate a discharge injected into the corona electrode system. The electric power is d / 200 (J) or more per unit electrode length of the corona discharge wire per one extremely short pulse high voltage, and d / 5 (J).
And at least 90% of the discharge power is injected within 100 d (nanosecond) after the pulse is applied, and thereafter, the voltage remaining between the corona discharge electrode and the counter electrode is reduced by 5 d.
(KV) or less.

[0013]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS As shown in FIG. 1, a gas passage 2 in a casing 4 having a gas inlet 2 for introducing exhaust gas 1 before purification and a gas outlet 3 for discharging exhaust gas after purification. A corona discharge electrode 6 and a counter electrode 7 opposed thereto.
Between the corona discharge electrode 6 and the counter electrode 7 with a bushing 9 for supplying power to the corona discharge electrode 6 from the outside of the casing 4. Very short pulse high voltage V with extremely short pulse width
In a gas purification apparatus provided with a high-voltage ultrashort pulse power supply 10 for applying p, a corona discharge is generated when the distance (discharge distance) between the corona discharge electrode 6 and the counter electrode 7 is d (cm). At this time, the discharge power P to be injected into the corona electrode system 8 is not less than d / 200 (J) per unit electrode length of the corona discharge electrode 6 per one extremely short pulse high voltage Vp.
5 J or less, and 90% or more of the discharge power P is injected within 100 d (nanoseconds) after pulse application, and the voltage remaining between the corona discharge electrode 6 and the counter electrode 7 after that is reduced by 5 d. (KV) or less.

The corona electrode type reactor 11 is shown in FIG.
As shown in the figure, a rectangular box shape is formed, a gas outlet 3 is provided on the front side, a gas inlet 2 is provided on the rear side, and the exhaust gas 1 before purification is supplied from the gas inlet 2, and the gas outlet 3 The purified gas 12 after the purification is discharged.

Of course, the shape of the corona electrode type reactor 11 is not limited to a square box, but may be any shape such as a cylindrical structure.

The corona electrode type reactor 11 is provided with the high-voltage ultra-short pulse power supply 10 via a cover duct 13, and the pulse forming circuit 1 is provided in the high-voltage ultra-short pulse power supply 10.
A pulse current detector 15 and a pulse voltage detector 16 are sequentially connected to the output side, and the output side of the pulse current detector 15 and the corona discharge electrode 6 are connected to the electric wire bushing 17 and the bushing 9. Are connected by a high-voltage wiring 18 penetrating through.

As shown in FIG. 1, a corona discharge electrode type reactor 1
1 is provided with support insulators 19 and 20 on the inner surface at the bottom, and a photodetector 21, a sound detector 22 and a support insulator 23 are provided on the inner surface at the top, respectively.
The exhaust gas duct 26 of the exhaust gas 1 shown in FIG.
Is provided with a purification gas duct 29 shown in FIG.

In FIG. 2, d denotes the discharge distance in the corona electrode system 8 composed of the linear corona discharge electrode 6 and the plate-shaped counter electrode 7, and the corona discharge electrode system 8 of the present invention is used in this embodiment. However, as shown in FIG. 3, the discharge distance d is formed between the linear corona discharge electrode 6a and the outer periphery thereof.
Or a corona discharge electrode system 8a composed of a cylindrical counter electrode 7a concentrically spaced apart from each other or, as shown in FIG. 4, a discharge distance d between a linear corona discharge electrode 6a and its outer periphery.
It is also possible to form a corona discharge electrode system 8b, which is arranged at a distance of discharge distance d from the polygonal cylindrical counter electrode 7b, which is arranged at an interval.

In the ultrashort-pulse high-voltage charged gas purifying apparatus shown in FIG. 1, an ultrashort-pulse high voltage Vp having a very short pulse width is applied to the corona discharge electrode system 8 from the output side of the pulse forming circuit 14. The voltage waveform and current waveform of the ultrashort pulse are greatly affected by the configuration of the pulse forming circuit 14, the method of supplying the ultrashort pulse high voltage, the configuration of the corona discharge electrode system 8, and the temperature and properties of the exhaust gas.

However, irrespective of the temperature and properties of the exhaust gas, the distance (discharge distance) between the corona discharge electrode 6 and the counter electrode 7 is d even in the ultrashort pulse high voltage electrified gas purifier.
(Cm), when corona discharge is generated, the discharge power P injected into the corona electrode system 8 is increased by d per unit electrode length of the corona discharge electrode 6 per one extremely short pulse high voltage Vp.
/ 200 (J) or more and d / 5 (J) or less, and
A pulse is applied so that 90% or more of the discharge power P is injected within 100 d (nanosecond) after application of the pulse, and thereafter, the voltage remaining between the corona discharge electrode 6 and the counter electrode 7 is 5 d (kV) or less. It has been found that by selecting the configuration of the formation circuit 14, the method of supplying an extremely short pulse high voltage, and the configuration of the corona discharge electrode system 8, frequent occurrence of sparks can be prevented and gas purification performance can be achieved.

That is, in FIG. 5, the pulse voltage waveform V
(T) and the pulse current waveform I (t), the time accumulated discharge power P (t) is

(Equation 1) This P (t) rises rapidly and then becomes a substantially flat and constant value. This substantially constant value is defined as discharge power per pulse. The value obtained by dividing the discharge power per pulse by the discharge line length (m) is d / 20.
0 (J) or more and d / 5 (J) or less, and P (t)
Is less than 100d (nanoseconds) until the discharge power becomes 90% of the discharge power per pulse.
The value of V (t) after (nanosecond), V (100d) is 5d
(KV) or less.

Here, as d increases, the discharge power per unit electrode length of the corona discharge electrode can be increased, and the amount of exhaust gas that can be treated can be increased.
Needs to be increased, and it is necessary to select d according to the type and amount of the processing gas. Further, by making the rising time of the extremely short pulse high voltage Vp as short as possible, the time required for P (t) to become 90% of the discharge power per pulse can be made 100 d (nanosecond) or less. However, as d is smaller, the rise time is made shorter and the discharge is not terminated quickly. The remaining pulse voltage changes depending on the energy possessed by the ultrashort pulse high voltage Vp and the intensity of the discharge, but the value of V (t) after 100d (nanosecond), V (100d) is 5d (kV) or less. Then, a short circuit between electrodes such as a spark can be prevented.

In particular, by controlling the bias voltage shown in FIG. 5, V (100d) = 5d while satisfying the above conditions.
(KV) or less.

The larger the number of times of pulse application, the smaller the corona discharge electrode type reactor can be. When the high voltage Vp is applied, normal corona discharge does not occur, and a spark is likely to occur. Therefore, when the application of the extremely short pulse high voltage Vp is set to 200 / d (times) or more and 20,000 / d (times) or less per second, the residual ions are relaxed and the spark can be suppressed.

As described above, it is possible to secure a discharge power sufficient for purifying gaseous pollutants in exhaust gas, and to prevent a spark or the like from being generated even if a discharge inhibitor such as moisture in the exhaust gas is present. In the exhaust gas treatment, accidental short circuit between electrodes such as sparks cannot be avoided. Therefore, first, one or both of the pulse current detector 15 and the pulse voltage detector 16 of FIG. 1 are provided in the high-voltage ultrashort pulse power supply 10 in order to detect a short circuit between the electrodes due to a reader, spark, arc, or the like. And good. Of course, it is also possible to provide the high voltage wiring between the power supply bushing 17 and the bushing 9 outside the high voltage ultrashort pulse power supply 10 and the corona electrode system reactor 11. When a short circuit between the electrodes due to a reader, spark, arc, or the like occurs, the pulse voltage instantaneously drops to zero at that moment, or an abnormally high pulse current is observed, and the short circuit between the electrodes can be detected.

As another method of detecting a short circuit between electrodes, there is a method of recognizing a flash or a sound generated by a short circuit between electrodes. For example, the photodetector 21 and the sound detector 22 shown in FIG. 1 are installed in the corona electrode-based reactor 11 to detect a flash which is much stronger than the discharge light during normal operation due to a short circuit between the electrodes. It is possible to detect an impulsive sound generated by the short circuit, which is much larger than the discharge sound during normal operation.

Immediately after a short circuit between electrodes due to a leader, a spark, an arc, or the like, if the application of the ultrashort pulse high voltage Vp is performed at a normally set interval, that is, at t in FIG. The short-circuit between the electrodes is mild by the reader, that is, from the stage where the plasma temperature of the plasma channel causing the short-circuit between the electrodes is relatively low, to the spark, arc and strong short-circuit between the electrodes, the plasma temperature of the plasma channel becomes high. Therefore, a conductive path is formed in the gas. As a result, each time the extremely short pulse high voltage Vp is applied, the tendency of arc generation increases. Therefore, as shown in FIG. 6, when a short circuit occurs, the short circuit is detected by the detecting means, and the idle period t longer than the normal set interval t is set.
The application of the extremely short pulse high voltage Vp is stopped for 1 (second). By providing the pause period t1 (second), the plasma channel is completely cooled when the plasma temperature of the plasma channel is relatively low. Further, as a safety measure, if the inter-electrode short circuit occurs again at the extremely short pulse high voltage Vp immediately after the pause period t1 (second), t1
The pause period t2 (second) longer than (second) is provided to prevent a continuous short circuit between the electrodes.

As a method for preventing the occurrence of a continuous short circuit between the electrodes, as shown in FIG.
There is also a method of pausing at t1 (second) when N (times) or more short-circuits between electrodes are detected at 1 (second). In this case, as in the case of FIG. 6, as a safety measure, if the inter-electrode short circuit occurs again at the extremely short pulse high voltage Vp immediately after the pause period t1 (second),
A pause t2 (second) longer than t1 (second) may be provided to prevent a continuous short circuit between the electrodes.

When gas treatment is performed by applying a very short pulse high voltage Vp, a corona discharge electrode is used to improve the corona discharge characteristics in the corona discharge system reactor 11 and to measure the increase of radicals generated by corona discharge. Before the system reactor 11,
Temperature control device 24, pretreatment device 25, additive gas injection device 27
It is good to put.

For example, in the decomposition of gaseous dioxins, it has been found that treatment at a gas temperature above the acid dew point of about 150 ° C. to 230 ° C. can be performed with high efficiency. Therefore, the temperature of the exhaust gas may be cooled by a temperature control device 24 such as a gas-gas heat exchanger or a water spray cooling tower. Further, when decomposing and removing odors and the like in the exhaust gas from the septic tank or the tank, when the humidity in the exhaust gas is high and introduced into the corona discharge electrode type reactor 11 as it is, dew condensation occurs, and a short circuit between the electrodes occurs or the odor is reduced. In some cases, it may be adsorbed by dew.
Exhaust gas may be heated by using it as 4.

When particulate matter is present in the exhaust gas, a short circuit between the electrodes such as a spark is likely to occur. Therefore, after removing particulate matter by placing a bag filter, an electrostatic precipitator, a mist separator, or the like as the pretreatment device 25, it is preferable to introduce the exhaust gas into the corona electrode system reactor 11.

Further, when a hydrocarbon gas such as propane or butane is injected into the exhaust gas from the additive gas injection device 27 in a stage preceding the corona discharge electrode reactor 11, generation of OH radicals is promoted, and the corona discharge electrode reactor 11 , The discharge power (kwh / Nm ³ ) per unit flow of exhaust gas can be reduced. That is, it is possible to greatly increase the amount of exhaust gas that can be treated using the same ultrashort high-voltage pulse power supply 14 and corona discharge system reactor 11.

Depending on the type of gaseous pollutants to be treated, an oxidizing agent such as ozone or hydrogen peroxide is added,
In some cases, the treatment in the coexistence state with the radicals generated in the corona discharge electrode system reactor 11 is more economical than the single treatment by the corona discharge electrode system reactor 11. That is,
The effect of coexisting the reaction of the oxidizing agent for a relatively short time with the reaction of the radical for a very short time is obtained. As a result, the ultrashort high-voltage pulse power supply 14 and the corona discharge electrode system reactor 11 can be reduced in size, and at the same time, the amount of electricity used can be reduced.

The reaction between gaseous pollutants and radicals in the corona discharge electrode type reactor 11 is a gas phase reaction, so that it is difficult to greatly increase the reaction constant. Therefore, it is preferable to improve the performance of decomposing and removing gaseous pollutants by providing a reaction promoting layer 30 for promoting an oxidation / reduction reaction downstream of the corona discharge electrode type reactor 11.

The reaction promoting layer 30 was filled with a material for providing a surface reaction field such as a catalyst, activated carbon, impregnated carbon, activated carbon carrying a catalyst, zeolite, dielectric pellets, dielectric fibers, metal pellets and metal fibers. A packed layer or the like can be used. Further, a spray tower for spraying an aqueous solution or slurry of calcium hydroxide, magnesium hydroxide, or the like can be used as the reaction promoting layer 30.

Further, when treating the type of gaseous pollutants to be treated, for example, dibenzofuran or PCB, the reaction promoting layer 30 may be simply a duct or space for providing a reaction time.

[0037]

According to the present invention, as described above, the corona discharge is generated so that the discharge power to be injected into the corona electrode system is reduced by d per unit length of the corona discharge wire per one extremely short pulse high voltage.
/ 200 (J) or more and d / 5 (J) or less, and 90% or more of the discharge power is 100 d (nanosecond) after pulse application.
In addition, the voltage remaining between the corona discharge electrode and the counter electrode is set to 5 d (kV) or less after that, so that discharge power enough to purify gaseous pollutants in exhaust gas is secured. In addition, even if a discharge inhibiting substance such as moisture in the exhaust gas is present, stable operation can be performed without generating a spark or the like, and high purification performance can be obtained. Further, by changing the bias voltage, the discharge voltage applied to a critical point that is not hindered by a short circuit between the electrodes such as a spark generated by the voltage remaining in the corona discharge electrode system 8 is increased, and sufficient discharge power is injected. be able to. In addition, when an accidental spark occurs, the application of the extremely short pulse high voltage Vp is restarted after the pause period, so that it is possible to prevent the occurrence of a short circuit between the electrodes continuously, so that stable operation can be performed. Furthermore, by combining a temperature control device, a pretreatment device, an additive gas injection device, a reaction accelerating layer, etc. with a corona discharge electrode type reactor, purification performance is improved, and running costs such as electricity costs are reduced by reducing discharge power. It becomes possible to reduce.

[Brief description of the drawings]

FIG. 1 is a front view showing an embodiment of an ultrashort pulse high voltage electrified gas purifying apparatus according to the present invention.

FIG. 2 is a perspective view of a part of FIG. 1;

FIG. 3 is a perspective view showing another embodiment corresponding to FIG. 2;

FIG. 4 is a perspective view showing another embodiment corresponding to FIG. 3;

FIG. 5 shows a pulse voltage waveform (Vt) and a pulse current waveform I of an ultrashort pulse high voltage power supply for applying electric power to the gas purification apparatus of FIG.
FIG. 7 is a curve diagram showing changes in (t) and time accumulated discharge power P (t) with respect to the heating time.

FIG. 6 is a diagram showing a pulse voltage change with respect to an application time of an extremely short pulse high voltage power supply of the gas purification apparatus of FIG. 1;

FIG. 7 is a diagram showing another state of FIG. 6;

FIG. 8 is a side view showing a use state of the gas purification device of FIG. 1;

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Exhaust gas 2 Gas inlet 3 Gas outlet 4 Casing 5 Gas passage 6 Corona discharge electrode 7 Counter electrode 8 Corona discharge system 9 Bushing 10 High voltage ultra-short pulse power supply 11 Corona electrode system reactor 12 Purified gas 14 Pulse forming circuit 15 Pulse current detector Reference Signs List 16 pulse voltage detector 17 electric wire bushing 18 high voltage wiring 19 support insulator 20 support insulator 21 photodetector 22 sound detector 23 support insulator 24 temperature control device 25 pretreatment device 26 exhaust gas duct 27 additive gas injection device 28 additive gas injection 29 purification Gas duct 30 Reaction promoting layer 31 Blower 32 Stack 33 Clean gas

──────────────────────────────────────────────────続 き Continued on the front page (51) Int.Cl. ⁷ Identification symbol FI Theme coat ゛ (Reference) B01D 53/44 B01D 53/34 117E 53/70 117Z 53/86 134E B01J 19/08 53/36 B F term (Reference) 4D002 AA02 AA12 AA21 AB02 AB03 AC01 AC02 AC04 AC10 BA07 BA12 BA13 BA14 CA13 DA51 DA52 DA56 EA02 GA01 GA02 GB20 4D048 AA02 AA06 AA11 AA22 AB01 AB02 BA05X CC38 CD08 DA01 DA03 DA20 EA03 4G075 AA03 CA03 A03 A03 CA54 CA57 DA01 DA02 DA05 EB01 EC01 EC13 EC21 EE01 EE02 EE07 EE12 FC20

Claims (16)

[Claims] 1. A gas inlet for introducing a gas to be purified containing gaseous pollutants such as nitrogen oxides, sulfur oxides, dioxins, volatile organic substances, and foul odors, and a gas inlet for discharging the purified gas. A corona discharge electrode and a counter electrode facing the corona discharge electrode are disposed in a gas passage in a casing having a gas outlet so as to be insulated from each other, and a bushing for supplying power to the corona discharge electrode from outside the casing is provided. System reactor, and a gas purification apparatus provided with a high-voltage ultra-short pulse power supply for applying a very short pulse high voltage having a very short pulse width between the corona discharge electrode and the counter electrode, the corona discharge electrode and the counter electrode When the distance (discharge distance) is d (cm), the discharge electrode to be injected into the corona electrode system is generated by corona discharge so that the unit electrode length of the corona discharge wire per one extremely short pulse high voltage. D / 200 (J) or more, d /
5 (J) or less, and 90% or more of the discharge power is injected within 100 d (nanosecond) after the pulse application, and the voltage remaining between the corona discharge electrode and the counter electrode thereafter becomes 5 d (kV). 3.) An ultra-short pulse high-voltage electrified gas purifier characterized by the following. 2. The apparatus according to claim 1, wherein the number of times of pulse application is 200 / d (times) per second or more and 20,000 / d.
(Time) An ultra-short pulse high-voltage electrified gas purifier characterized by the following. 3. Apparatus according to claim 1, wherein:
A corona electrode-based reactor, a high-voltage wiring, or a high-voltage ultra-short pulse power supply, equipped with means for measuring one or both of a pulse voltage and a pulse current; Purification device. 4. The apparatus according to claim 3, wherein the occurrence of the short circuit between the electrodes due to the corona discharge caused by the reader, spark, arc or the like is detected by detecting an abnormal decrease in pulse voltage or an abnormal current value of the pulse current. Characteristic ultra-short pulse high voltage electrified gas purifier. 5. The apparatus according to claim 1, wherein:
Ultra-short pulse high voltage, characterized by installing a sensor in the corona electrode system reactor to detect the occurrence of short circuit between electrodes due to corona discharge due to reader, spark, arc, etc. Electrified gas purifier. 6. The apparatus according to claim 4, wherein
A high-voltage ultra-short pulse power supply having a control circuit for stopping application of an ultra-short pulse high voltage to the corona discharge electrode during a pause time t1 (second) when the inter-electrode short circuit occurs. Pulse high voltage electrified gas purifier. 7. The device according to claim 4, wherein
A control circuit is provided for stopping application of a very short pulse high voltage to the corona discharge electrode during a pause time t1 (second) when a short circuit between the electrodes is detected N times or more during a predetermined time T1 (second). A pole characterized by using a high-voltage ultrashort pulse power supply 8. The apparatus according to claim 6, wherein
If a short circuit between the electrodes occurs again by applying the first extremely short pulse high voltage to the corona discharge electrode after the pause time of t1 (second), a control circuit for providing a pause time t2 (second) of t1 or more is provided. An ultra-short pulse high-voltage electrified gas purifier characterized by using a high-voltage ultra-short pulse power supply provided. 9. The ultra-short pulse high voltage electrified gas purifying apparatus according to claim 1, wherein a temperature control device is provided upstream of the apparatus for adjusting a gas temperature suitable for a reaction by corona discharge, and / or Alternatively, an ultrashort-pulse high-voltage electrified gas purifier is provided with a pretreatment device for stably performing corona discharge. 10. The ultrashort pulse high-voltage electrified gas, wherein the temperature control device according to claim 9 is a gas-gas heat exchanger, a water spray cooling tower, a heating device using a heater or a burner. Purification device. 11. An ultra-short pulse high-voltage electrified gas purifying apparatus, wherein the pretreatment apparatus according to claim 9 is a particulate matter removing apparatus such as a bag filter, an electrostatic precipitator, and a mist separator. . 12. The ultra-short pulse high-voltage charged gas purifying apparatus according to claim 1, wherein a nitrogen oxide, a sulfur oxide, a dioxin, a volatile organic substance,
Ultrashort pulse characterized by adding hydrocarbon gas such as propane and butane and / or oxidizing agent such as ozone and hydrogen peroxide to promote oxidation of gaseous pollutants such as odors by corona discharge High voltage charged gas purifier. 13. The gas purifying apparatus according to claim 1, wherein gaseous pollutants such as nitrogen oxides, sulfur oxides, dioxins, and volatile organic substances are provided downstream of the apparatus. An ultra-short pulse high-voltage electrified gas purifier characterized by comprising a reaction accelerating layer for accelerating the oxidation and / or reduction reaction of a gas. 14. The reaction promoting layer according to claim 13, which provides a surface reaction field for a catalyst, activated carbon, impregnated carbon, activated carbon carrying a catalyst, zeolite, dielectric pellet, dielectric fiber, metal pellet, metal fiber and the like. An ultra-short pulse high-voltage electrified gas purifying apparatus characterized in that it is a packed bed filled with the above materials. 15. The ultra-short pulse high-voltage electrified gas purifying apparatus according to claim 13, wherein the reaction promoting layer is a spray tower for spraying an aqueous solution or a slurry of calcium hydroxide, magnesium hydroxide, or the like. . 16. An ultra-short pulse high-voltage charged gas purifying apparatus, wherein the reaction promoting layer according to claim 13 is a duct or a space for providing a reaction time.