JPH11179232A - Dust collection by electronically conductive fluid electrode - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide an electronic dust collection method easy to maintain, since a process for washing and regenerating a dust collection electrode of an electronic dust collector is a troublesome work. SOLUTION: An electronically conductive fluid 2 such as water is charged into a fluid tank 1, and an ionizing wire 3 is provided at a distance from the electronically conductive fluid 2, and high voltage is impressed between the electronically conductive fluid 2 and the ionizing wire 3 to generate corona discharge and impart electric charge on contamination dust 5 in contaminated air, and the electrically conductive fluid 2 works as the dust collection electrode to absorb and collect the dust.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a dust collecting electrode of an electronic dust collecting device among various dust collecting devices.

[0002]

2. Description of the Related Art Conventionally, as a dust collecting apparatus, a filter system and an electronic dust collecting system have been generally used. The filter system is a method of purifying air by providing a filter in a flow path of contaminated air and filtering contaminants in the contaminated air. On the other hand, in the electron dust collection method, when a high voltage is applied between an ionization wire or an ionization needle and an electrode, a corona discharge is caused between the ionization wire and the electrode to give a charge to floating dust in contaminated air. A Coulomb force is generated between the dust collecting electrodes applied with a high voltage, and is attracted to the dust collecting electrodes to collect dust. Usually, a metal plate is used for the dust collecting portion of the electronic dust collecting system, and an electrode provided with an electric conductor or a resin film thereof is used.

[0003]

The conventional dust collecting portion of the electronic dust collecting system includes a bare electrode made of a metal plate or an electric conductor, an electrode obtained by treating a metal plate or an electric conductor with a resin film, or the like. there were. In these, if dust collection is continued, polluted dust adheres to the surface, and the dust collection efficiency decreases with the dust collection. Therefore, cleaning and regenerating the surface is an indispensable operation. It is extremely difficult to clean and regenerate the dust collecting electrode to which contaminated dust has actually adhered, and it is not possible to clean the electrode without using a strong cleaning agent. This is one of the causes of the environmental pollution caused by the cleaning agent, and it is necessary to avoid it when the environmental problems are shouting loudly in recent years. To make up for this shortcoming,
2. Description of the Related Art An electronic precipitator has been developed which collects dust by bringing a precipitating paper into close contact with a precipitating electrode plate. Although this dust collecting paper differs depending on the maker, there are a type using a dedicated dust collecting paper and a type using household dust paper. With this method of using dust collection paper, it is only necessary to replace the dirty dust collection paper, and a cumbersome cleaning process is not required, and a reduction in maintenance work can be expected. In addition, dust collection paper is environmentally friendly even if discarded because it is paper, but the raw material for paper is timber, and Japan relies on imports for much of it.
The more you import, the more the local destruction of nature will occur,
The problem of natural destruction still remains. Therefore, a more environmentally friendly dust collection and cleaning method has been desired.

[0004]

Means for Solving the Problems To solve the above problems, in an electron dust collection system, a corona is applied by applying a high voltage between an ionization wire or an ionization needle and an electrode in order to charge the contaminated dust. Although a discharge is caused, the electrode is usually a solid electrode using a metal plate or an electric conductor. Contaminated dust is adsorbed on the solid electrodes, so that it is necessary to perform troublesome cleaning in order to regenerate the dust collecting effect.However, since a cleaning agent and dust collecting paper are required, it is not preferable from the viewpoint of environmental problems. is there. In addition, the following method is adopted as an alternative to an inexpensive and environmentally friendly electrode or an electrode due to the cost and labor of the electrode itself, or various environmental conditions. Conventionally, the electrodes that collect dust are metals, electric conductors,
Alternatively, a solid electrode having such a film is used. These could not escape from the troublesome problem of cleaning in order to maintain the dust collection efficiency.However, from this complicated cleaning process, by placing the dust collection paper in front of the dust collection electrode, the contaminated dust was adsorbed on the dust collection paper Although a simple method of disposing of the dust-collecting paper has been developed, problems associated with the disposal and replacement of the dust-collecting paper still remain from an environmental point of view. Thus, it has been found that a dust collecting effect can be similarly exerted even when an electrically conductive fluid is used instead of the solid electrode. When a high voltage is applied between the ionizing wire or the ionizing needle and the electrically conductive fluid, corona discharge is generated and contaminated dust obtains electric charge, and is attracted to the electrically conductive fluid by Coulomb force. Thus, while the contaminated air is being purified, a large amount of contaminants dissolved in the electrically conductive fluid are adsorbed, heavy insoluble materials sink, and light ones float on the liquid surface. When the amount of collected polluted dust increases, the dust collection efficiency is reduced. Therefore, the electrically conductive fluid may be discarded and replaced with a new electrically conductive fluid. The electrically conductive fluid is preferably one that can be disposed of naturally, and if it is of a type that cannot be disposed of naturally, it may be industrially treated. Therefore,
Water will be the most suitable material for the familiar electrically conductive fluid that can be disposed of naturally. Water can be obtained at any time from the faucet, waste can be drained to the drain, and it is of course inexpensive and would be the most suitable electrically conductive fluid.

[0005]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS A first embodiment of the present invention will be described with reference to FIG. An electrically conductive fluid (2) is placed in the fluid tank (1), and an ionization wire (3) or an ionization needle is arranged at a distance from the liquid level. Next, a high voltage supplied from a high voltage power supply (4) is applied to the electroconductive fluid (2) at the cathode and to the ionization line (3) at the anode. Here, care must be taken because an arc discharge occurs if the distance between the liquid surface of the electrically conductive fluid (2) and the ionization line (3) is too short. When this distance is properly maintained, corona discharge occurs between the electrically conductive fluid (2) and the ionizing wire (3), and the polluting dust (5) becomes a positively charged positively charged polluting dust (6). The charge contamination dust (6) is drawn by Coulomb force towards the cathodic electrically conductive fluid (2). Thus, the electrically conductive fluid (2)
The positively charged contaminant dust (6) that has reached the surface of the surface floats or permeates into the liquid. In addition, if it is a polluting chemical substance, it may be dissolved in the electrically conductive fluid (2). This means a deodorizing effect if the chemical substance is a source of odor.

A second embodiment of the present invention will be described with reference to FIG. This embodiment is an embodiment in which the polarity of the high voltage power supply (4) in the first embodiment is reversed, and the electrically conductive fluid (2) is an anode, and the ionization line (3) or the ionization needle is a cathode. is there. The principle of dust collection is the same as that of the first embodiment, but the polluted dust (5) becomes negatively charged polluted dust (7) and is attracted to the electrically conductive fluid (2). In the dust collection method with this polarity, some of the oxygen molecules in the air are converted to ozone. Although this ozone has a strong oxidizing power and has effective functions such as sterilization and deodorization, it is a well-known fact that inhalation by humans is harmful. However, the ozone generated is harmless because it returns to oxygen molecules when it comes into contact with the electrically conductive fluid (2), especially water, but is exhausted because all of the ozone does not come into contact with the electrically conductive fluid (2). Minutes remain harmful. Nevertheless, there is a great advantage that the amount of ozone generated, which is a drawback of the electronic dust collector, is reduced.

[0007] If the electrically conductive fluid (2) is an evaporative liquid, it is vaporized as vapor because it is in contact with air, so that the vapor can be diffused into the atmosphere. If the electrically conductive fluid (2) is water, it is vaporized as water vapor, so this phenomenon is natural humidification itself, and has a humidifying function.

[0008]

The above embodiment has the following effects. In a normal electronic dust collector, it is necessary to clean the dust collecting electrode, but this operation is complicated, and there are various problems with the environment of the cleaning agent. Therefore, if an electrically conductive fluid is used for the dust collecting electrode, it is not necessary to clean the electrode, and the dirty electrically conductive fluid may be discarded, and then the electrically conductive fluid may be supplied. The pollutants in the polluted air include not only polluted dust but also toxic chemicals and toxic gases, which cannot be removed by solid dust collecting electrodes or dust collecting paper. However, by using an electrically conductive fluid for the dust collecting electrode as in the present invention, it is possible to capture and dissolve and remove toxic substances, which is a great feature not found in the conventional electronic dust collecting apparatus. This phenomenon is also a deodorizing effect. Various solvents can be used as the electrically conductive fluid, and the most familiar "water" is satisfactory in terms of cost and environment. When the voltage polarity of the ionization line is set to the cathode, high concentration ozone is generated to kill surrounding germs. It is safe because the amount of ozone generated can be reduced. Further, when the electrically conductive fluid is water, the water and the air are in contact with each other, so that the water is vaporized as water vapor. This phenomenon is natural humidification itself,
The present invention also has the function of a humidifier, so that a very convenient device can be obtained. In general, for the purpose of using the air purifier, the main focus will be on tobacco. Nicotine, which is the culprit of the smell of tobacco, is water-soluble, and if inexpensive water is used as the electrically conductive fluid, it can also exert a deodorizing effect according to the above principle. Further, acetaldehyde odor and ammonia odor can be deodorized by the same principle.

[Brief description of the drawings]

FIG. 1 is a principle diagram of a first embodiment of the present invention.

FIG. 2 is a principle diagram of a second embodiment of the present invention.

[Explanation of symbols]

 1 ... Fluid tank 2 ... Electrically conductive fluid 3 ... Ionized wire 4 ... High voltage power supply 5 ... Pollution dust 6 ... Positive charge pollution dust 7 ... ..Negative charge contamination dust

Claims (7)

[Claims] An electric conductive fluid (2) is put in a fluid tank (1) to form a dust collecting electrode, and an ionization line (3) is provided at a distance from the electric conductive fluid (2). A dust collection method using an electrically conductive fluid electrode in which a high voltage is applied between the ionic fluid (2) and the ionization line (3). 2. The method of claim 1, wherein the ionization line is an ionization needle. 3. The method of claim 1, wherein the electrically conductive fluid (2) is water. 4. The dust collecting method according to claim 3, which has a humidifying effect. 5. The dust collecting method according to claim 4, which has a deodorizing effect. 6. The method for collecting dust using an electrically conductive fluid electrode according to claim 5, which has a sterilizing effect by ozone generation. 7. The dust collecting method according to claim 5, which has an ozone reducing effect.