JPH0447110A - Exhaust gas purification device - Google Patents

Abstract

PURPOSE:To remove poisonous gas in exhaust gas stably for a long period by providing a charging means which charges fuel liquid to a plurality of sweeping type corona generators composing an exhaust gas purification device, and also providing a supplying means which supplies the fuel liquid flowed from the corona generators to an engine. CONSTITUTION:Exhaust gas is sent from an engine 15 to an upper duct 19, and passed through a plurality of sweeping type corona generators 6. Poisonous gas such as NOx in the exhaust gas is removed by ozone or ionic blowing generated in the corona generators 6. On the other hand, fuel liquid 5 is dropped from a main tank 10 through a charging means 8 and a dripping hole 8a into the corona generators 6. Coulomb force is applied thereto between electrodes where corona C1 is generated. Or, the liquid is scatteringly adsorbed to the surface of an insulation part 3 by ionic blowing. The surface of the insulation part 3 is always washed and smoothened by the fuel liquid 5. Afterward, the fuel liquid 5 is recovered into a sub-tank 9, and supplied through a supplying means 13 and an engine 15.

Description

[Detailed Description of the Invention] [Industrial Field of Application] This invention relates to an exhaust gas purification device that cleans exhaust gas from engines installed in vehicles and ships, engines for private power generation, etc. by corona discharge. In particular, the present invention relates to an exhaust gas purification device having a blower corona generating section that can generate a blower corona discharge while maintaining stability for a long period of time.

[Prior Art] Conventionally, this type of technology has been disclosed in Japanese Patent Application Laid-Open No. 57-20510. According to the conventional technology, the cylindrical dust collecting tube is formed into a corrugated shape, and a desired number of discharge wires are stretched in the hollow part of the cylindrical dust collecting tube, and a high voltage is applied to the discharge wires. was applied to remove fine particles such as tar particles and graphite from the exhaust gas. In other words, it was a cylindrical dust collector for collecting and removing dust.

[Problems to be Solved by the Invention] However, according to the above-mentioned conventional technology, there is a risk that the discharge wire will break when spark discharge occurs between the dust collection tube and the discharge wire. It was.

In addition, the purification ability was weak and insufficient to remove harmful residues such as N08 and COx from exhaust gas.

Recently, corona discharge has been considered as an effective form of discharge generation to activate and eliminate such harmful gases.
-We were unable to secure the desired value for the corona discharge phenomenon caused by boat fishing.

Therefore, in order to put into practical use the technology of eliminating harmful gases by corona discharge, it was necessary to generate a unique corona, that is, an electronic corona, and it was necessary to ensure an increase in the number of electronic coronas.

Furthermore, in order to generate the electron corona stably for a long time,
For example, it was necessary to eliminate the influence of adhesion of carbonized particles on the generation of the electronic corona.

[Means for Solving the Problems] This invention was created in view of the above-mentioned problems, and includes: a first electrode having a convex portion on its surface; a second electrode facing the first electrode; an electronic corona generating section consisting of an insulating part attached to at least a surface of the second electrode on the first electrode side, and a high voltage power source connected between the two electrodes; and injecting a fuel liquid into the electronic corona generating section. The present invention provides an exhaust gas purification device comprising: an injection means for supplying fuel liquid flowing out from the electronic corona generating section to an engine;

In this invention, the electronic corona is stably maintained and generated by the above-mentioned constituent means, and the exhaust gas is purified by the electronic corona over a long period of time. The purpose is to reuse it as engine fuel.

[Function] The exhaust gas purification device according to the present invention having the above-mentioned configuration functions as follows.

First, in the electronic corona generation section, the first electrode and the second
When a high voltage is applied between the electrodes, an electron corona is generated between the first electrode and the insulating portion attached to the inner surface of the second electrode.

This state is shown in FIGS. 3-5 and will be explained below.

FIG. 3 shows a state in which a positive voltage is applied to the first electrode 1 and a negative voltage is applied to the second electrode 2 by the high voltage voltage R4.

The arrow indicated by EO in FIG. Indicates the direction of a reverse electric field generated by charges accumulated on the surface of the insulating section 3, P indicates a positive charge accumulated on the surface of the insulating section 30, and CI indicates a positive polarity corona. indicates the most grown electron corona.

In the state shown in FIG. 3, an electron corona CI is generated and a positive charge P is accumulated on the surface of the insulating part 3, and a reverse electric field pc; IQ i! As the temperature progresses, the electronic corona C1 changes into a brush corona or a film-like corona that occurs only in the vicinity of the first electrode 1 and attenuates.

This phenomenon of attenuation of changes in the electron corona C1 is caused by the accumulation of too much positive charge P.
By taking measures to reduce this excess positive charge P, the electron corona C1 increases and grows.

In this invention, generation of the electronic corona C1 is ensured by neutralizing and reducing the excess positive charge P through the steps shown in FIGS. 4 and 5, which will be described later.

FIG. 4 shows a so-called zero point state where the polarity of the output of the high voltage power supply 4 is switched. In the state shown in FIG. 4, the generation of corona is temporarily stopped.

In FIG. 5, the polarity is opposite to that shown in FIG. 3, and the high voltage side 1 applies a negative voltage to the first electrode 1 and
The state in which a positive voltage is applied to each electrode 2 is shown.

In FIG. 5, e represents an electron, and C2 represents a negative polarity.

In the state shown in FIG. 5, a negative corona C2 and electrons e are generated from the first electrode 1, and the electrons e combine with the positive charge P accumulated on the surface of the insulating portion 3 to be neutralized.

As a result, the excess positive charge P is reduced, and when the state shown in FIG. 3 is reached again, the blade corona C1 is generated again.

As mentioned above, in the area where Oshiko corona occurs, Figures 3 to 5
A brush corona C1 is continuously generated by repeating the state shown in the figure, but when carbonized particles etc. adhere to the insulating portion 3 and unevenness occurs on the surface of the insulating portion 3, the brush corona C1 disappears and a spark discharge occurs. transition to. However, in the present invention, the fuel liquid 5 is injected into the blower corona generating part 6 by the injection means, and the deposits on the surface of the insulating part 3 are always cleaned by the fuel liquid 5. Therefore, the blower corona CI is stably generated in the blower corona generating portion 6 for a long period of time.

Then, when the exhaust gas is vented to the blower corona generating section 6, harmful gases such as NO, SO, CO, etc. in the exhaust gas are oxidized by O3 (ozone) generated by the blower corona, and become stable gases. or is cleaned by being adsorbed to the blower corona generating part 6 by ion wind.

[First Embodiment] FIG. 1 is a vertical sectional view showing a first embodiment of the present invention.

In the figure, 6 is a roller corona generation part that generates a roller corona C1 by applying a high voltage electric current si4, and includes a first electrode l, a second electrode 2, an insulating part 3, a high voltage electric current R4, and a support. It consists of section 7.

To be more specific, the first electrode 1 is, for example, a stainless steel rod processed into a spiral shape like a screw.

This spiral processing may be performed by appropriately selecting a method using a cutting machine such as a sharp milling machine, a method using a mold processing machine such as a sintering machine, or the like. By changing the pitch of the threads, a convex portion having a triangular cross-sectional shape or a convex portion having a trapezoidal cross-sectional shape on the surface of the first electrode 1 is formed.

Next, the first electrode 1 is supported by a support part 7 made of an insulating material at the center of a cylindrical insulating part 3 made of a material such as ceramics.

Then, the second electrode 2 is formed on the outside of the insulating part 3.

The second electrode 2 has an insulating part 3 made of ceramic or the like, for example.
It is formed by printing a metal paste on the surface of 0 and firing it. Alternatively, the second electrode 2 is prepared in advance using a metal vibrator, and then the surface of the second electrode φ is enameled with organic glass or the like to form the insulating portion 3. Alternatively, the insulating vibrator and the metal vibrator may simply be combined.

The first electrode 1 and the second electrode 2 are connected to the high voltage side 1, respectively.
It is electrically connected to. The high-voltage power supply 4 is a circuit that generates high voltage of both positive and negative polarities at a certain frequency, and its waveform may be a sine wave, a pulse wave, or the like.

The frequency mentioned above is a constant frequency or a constant frequency.
, H no! 121, 1 no rl +1 jiku/n T'/X
``Nol'Fil Salmon M+75 frequency.

5 is a fuel liquid. The fuel liquid 5 may be any liquid suitable for cleaning the insulating part 3 of the wiper corona generating part 6, and for example, light oil or the like can be used.

8 is an injection means. The injection means 8 is connected to the insulating part 3.
The fuel liquid 5 is injected into the surface on the first electrode 1 side, and has a drip hole 8a.

Reference numeral 9 denotes a sub-tank, which constitutes a liquid reservoir means 11 together with a main tank 10, which will be described later. The sub tank 9
The cap 1 is for storing the fuel H15 flowing out from the blower corona generating part 6, and the cap 1 is for discharging the sediment 5b.
2 is screwed to connect the supply means I3 and the circulation vibrator 14. The supply means 13 is constituted by a vibrator that connects the sub-tank 9 and the engine 15 in order to supply the fuel liquid 5 stored in the sub-tank 9 to the engine 15. Engine 15 is a teasel engine. Further, the circulation vibrator 14 pumps the fuel liquid 5 stored in the sub tank 9 to the pump 1.
6 connects the main tank IO.

The tip portions 13a and 14a of the supply means 13 and the circulation vibrator 14 are set at a position slightly higher than the bottom surface 9a of the sub-tank 9 to prevent the precipitate 5b from being sucked in. Furthermore, the sub-tank 9 has a collision plate 9b that separates mist such as fuel liquid contained in the exhaust gas.

IO is the main tank. The main tank 10 is
It is a tank that can be easily refilled from the outside.
It is connected to the injection means 8 together with the additive tank 17 .

The additive tank 17 stores additives such as detergent and dispersant in the fuel liquid 5.
Dissipate in a tank for adding to. The cleaning agent used herein is one that neutralizes deposit precursors and oil oxides or disperses them in the powder powder liquid 5 in the form of fine particles.

18 is a lower duct, and 19 is an upper duct.

The lower duct 18 and the upper duct 9 are exhaust gas passages, the lower tact 18 is connected to the sub-tank 9, and the upper duct 19 is connected to the engine 15.

A blower corona generating section 6 is sandwiched between the lower duct 18 and the upper duct 19. To be more specific, the lower part of the brush corona generating part 6 is in pressure contact with the lower duct 18 via a silicone rubber bunking 20a, and the upper part is also in pressure contact with the set member 21 via a backing 20b. Further, the set member 21 is fixed to the upper duct 19 with a screw 21a.

The set member 21 is a metal member, and facilitates the removal and attachment of the blower corona generating section 6 during maintenance.

An earth plate 22 is provided between the lower duct 18 and the upper duct 19, through which the plurality of blower corona generating parts 6 are inserted. The ground plate 22 is a member for grounding the second electrode 2 of each payter corona generating section 6 together with one end of the high-voltage power source 4, and the ground plate 22 connects the second electrode 2 to the ground through the contact member 23. It is electrically connected to 2. The contact member 23 is a member formed into a substantially U-shape and made of a metal material such as helium or copper alloy material, and is used to remove and attach the blower corona generating portion 6 during maintenance of the blower corona generating portion 6. is facilitated.

Next, the operation of the exhaust gas purification device having the above-mentioned configurations will be explained with reference to FIG. 1.

First, the exhaust gas sent from the engine +5 through the inlet hole 24 into the upper duct 19 as shown by arrow B is as follows.
As shown by arrow C, it passes through a plurality of electronic corona generating parts 6. At this time, the blade coronas C1 are lined up in groups inside the blade corona generating section 6 due to the discharge phenomenon, and all of the exhaust scum passes through the atmosphere of the blade coronas C1.

The exhaust gas contains harmful gases such as nitrogen compounds (No, , ), but these harmful gases are removed from the exhaust gas by ozone, ionic wind, etc. generated within the electronic corona generating section 6. .

The exhaust gas that has passed through the blower corona generating section 6 is purified, reaches the lower duct 18 as shown by the arrow, and is discharged to the exhaust hole 25 via the sub-tank 9 as shown by the arrow E and arrow F. .

On the other hand, the fuel liquid 5 is dripped from the main tank 10 onto the filler.

The fuel liquid 5 dropped into the electronic corona generating section 6 is diffused and adsorbed onto the surface of the insulating section 3 by the Coulomb force or by ion wind between the two electrodes where the brush corona CI is generated.

As a result, the surface of the insulating portion 30 is constantly cleaned and smoothed by the fuel liquid 5.

Then, the fuel ↓↓1I5 flowing out from the blower corona generating section 6 reaches the sub-tank 9 via the lower duct 18. At this time, a part of the fuel liquid 5 is contained in the exhaust gas as mist, and this mist collides with the collision plate 9b provided in the sub-tank 9, stalls, and is collected in the sub-tank 9. Thereby, the fuel liquid 5 can be used effectively.

Then, the fuel liquid 5 accumulated in the sub-tank 9 is removed by a pump 16.
The water is pumped up into the main tank 1O and injected into the blower corona generating section 6 again.

Further, the fuel liquid 5 accumulated in the sub-tank 9 is transferred to the supply means 1
It is also supplied to the engine 15 via 3. When the feed pump (not shown) configured as shown in FIG. The fuel liquid 5 that has cleaned the wiper corona generating part 6 is then stored in the sub-tank 9 and then transferred to the engine 15.
is supplied to and burned.

[Second Embodiment] FIG. 2 is a vertical sectional view showing a second embodiment of the invention. The second embodiment has almost the same configuration as the first embodiment described above, and the explanation of the common parts will be omitted here, and the different parts will be explained.

The second embodiment is different from the first embodiment in the connection position of the main tank IO. That is, the main tank 10 of the second embodiment is provided in the middle of the supply means 13. The main tank IO is installed at approximately the same height as the sub tank 9,
In addition, the diameter of the supply means 13 that connects the main tank 10 and the sub-tank 9 is set to be relatively large. Therefore, for example, when a vehicle accelerates and brakes, the fuel liquid 5
moves between the main tank 10 and the sub-tank 9 under the influence of inertia, and the fuel liquid 5 in the sub-tank 9 is diluted by the fuel liquid 5 in the main tank 10.

[Effects of the Invention] The present invention has an injection means for injecting a fuel liquid into a blower corona generating section constituting an exhaust gas purification device, and a supplying means for supplying the fuel liquid flowing out from the blower corona generating section to an engine. It is characterized by having

A large scale corona discharge can be stably maintained and generated over a long period of time, and by passing the automobile exhaust gas through the corona generation part, harmful gases in the exhaust gas can be stably removed for a long period of time. At the same time, the fuel liquid can be reused as fuel for the engine, resulting in excellent economical effects.

[Brief explanation of drawings]

FIG. 1 is a vertical sectional view of a first embodiment of the invention, and FIG. 2 is a vertical sectional view of a second embodiment of the invention. 3 to 5 are schematic diagrams for explaining the state of corona generation according to the present invention, in which FIG. 3 shows the state of positive corona generation, FIG. 4 shows the zero point state, FIG. 5 is a diagram showing the state of occurrence of negative polarity corona. DESCRIPTION OF SYMBOLS 1... First electrode, 2... Second electrode, 3... Insulating part, 4... High voltage power supply, 5... Fuel liquid, 6... Brush corona generation part, 7... ... Support part, 8... Injection means,
8a...Dripping hole, 9...Sub tank, lO...Main tank, 11...Liquid reservoir means, 13...Supply means, +4...Circulation pipe, 15...Engine, 18
...Lower duct, 19...Upper duct and above Figures Figures Figures Procedure Amendment (Voluntary) 1. No. 1990 Patent Application No. 153792 2. Title of Invention: Exhaust Gas Purification Device 3: Relationship with the amended person case

Claims (1)

[Scope of Claims] A first electrode having a convex portion on its surface, a second electrode opposite to the first electrode, and an insulating material that adheres to at least a surface of the second electrode on the first electrode side. and a blower corona generating section comprising a high-voltage power supply connected between the two electrodes, an injection means for injecting fuel liquid into the blower corona generating section, and supplying the fuel liquid flowing out from the blower corona generating section to the engine. An exhaust gas purification device comprising: a supply means;