JP2960267B2 - Wet electric precipitator - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a wet electric precipitator for efficiently removing suspended dust in a living space.

[0002]

2. Description of the Related Art In recent years, as a method of removing airborne dust such as tobacco smoke and dust from indoor air, an electric dust collector or a filter dust collector has been used, and a simple maintenance method is required.

[0003] Conventionally, this type of electric precipitator generally has a configuration as shown in FIG. Hereinafter, the configuration will be described with reference to FIG.

[0004] As shown in FIG. 5, in the main body 101,
The pre-filter 103 and the discharge wire 10 are sequentially arranged from the suction port 102.
4 and a parallel electrode plate 105 are provided. The charging unit 106 connects + to the discharge wire 104 and − to the parallel electrode plate by the high-voltage power supply 107 and applies a voltage to the charging unit 106 to generate corona discharge.
When the dust-containing air blown by the fan 108 passes through the charging unit 106, the dust is charged to + by corona discharge. In the dust collecting portion 109 alternately connected to the electrode plate by + and-by the high-voltage power supply device 107, an electric field is generated in the electrode plate, and the dust charged to + is collected by the-side electrode plate. The clean air is supplied to the fan 108
Is blown out from the outlet 110. In the above-described configuration, if the dust collector 109 is operated for a long time, a large amount of dust adheres to the dust collector 109. Therefore, the dust collector 109 needs to be cleaned or replaced with a new one at a certain time.

[0005] Prevention of adhesion of dust collected in dust collecting section 109
Water wettability as disclosed in JP-A-4-22449.
In an electric field with an electrode plate with improved
Water is supplied by the nozzle and the amount of water supplied is
0.002m per unit length ^Three/Min.m or more of water
A uniform water film is formed on the surface of the collection electrode and discharge electrode by supplying
Water that has formed and adhered to the electrode plate
And sometimes it is prevented.

[0006] In such a conventional electrostatic precipitator, by dust is capturing current to the particulate collection portion, the electrode spacing deposited dust on the electrode plate is narrowed, or cause spark discharge, since the electrode plate spacing is narrow However, there is a problem that it takes a lot of time to clean the surface, and it costs a lot to replace it with a new one.

[0007] In addition, a method of washing away dust particles by a method of washing away dust particles requires a pump for pumping water and water supply equipment for spraying water, which is a large-scale device. In addition, in order to prevent dust adhesion, water must be constantly supplied during operation, and thus a large water supply device is required.

SUMMARY OF THE INVENTION The present invention has been made to solve the above-mentioned problems, and it is a first object of the present invention to provide a wet electric precipitator capable of cleaning a dust collecting portion and eliminating the need for cleaning the dust collecting portion. Aim.

A second object of the present invention is to provide a wet-type electrostatic precipitator in which the dust collecting area can be easily increased and the dust collecting efficiency is improved.

[0010]

A third object is to increase the amount of charged particles,
An object of the present invention is to provide a wet type electric dust collecting device having improved dust collecting efficiency.

A fourth object of the present invention is to provide a wet-type electrostatic precipitator which increases a filter cleaning effect, suppresses spark discharge by uniforming a water film by clogging of a filter and surface activity of an aqueous solution, thereby reducing power consumption. Equipment will be provided.

[0013]

A first means for achieving the first object of the present invention comprises a discharge wire provided on a suction port side inside a main body, and a discharge wire provided downstream of the discharge wire. A dust collection filter, two shafts for fixing the dust collection filter to upper and lower ends inside the dust collection filter, a driving unit that rotates the shaft to rotate the dust collection filter, A water tank filled with water for immersing a part of the lower part of the filter, a fan for blowing air vertically to the dust filter, and blowing to an outlet, the discharge wire and the dust filter And a high-voltage power supply for applying a DC voltage to the power supply.

[0014] A second means for achieving the second object is to form discharge lines arranged in parallel inside the dust collecting filter.

[0015]

According to a third means for achieving the third object, a charging section comprising a discharge wire and a parallel electrode plate is provided downstream of the suction port.

In order to achieve a fourth object, a fourth means has a structure in which sodium hydroxide and a lower alcohol aqueous solution are put in a water tank.

[0018]

According to the first aspect of the present invention, the dust filter holding the water is rotated and the charged dust is directly dissolved in the water, so that the re-scattering of the dust can be prevented. This is to make the maintenance easy by replacing the water in the aquarium.

According to the configuration of the second means, the discharge wire is provided inside the dust collection filter, so that the discharge area is provided on both sides of the dust collection filter, and the dust collection efficiency can be improved.

[0020]

Further, according to the configuration of the third means, dust is charged by providing a charging section at a stage subsequent to the suction port,
The dust collection performance can be further improved.

[0022] Further, according to the fourth means, by adding sodium hydroxide and a lower alcohol aqueous solution to the water in the water tank, the cleaning power of the dust collecting filter can be increased and the dust collecting efficiency can be improved. It is.

[0023]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS A first embodiment of the present invention will be described below with reference to FIGS. As shown in FIG.
01, the pre-filter 10
3, a discharge wire 104, and a flame-retardant material, provided with a roll-shaped dust filter 1 having excellent air permeability and water retention, and water was poured so that a part of the lower portion of the dust filter 1 was soaked. A water tank 2 is provided. A shaft 3 and a shaft 4 are respectively installed at an upper end and a lower end of the dust filter 1, and the shaft 3 at an upper end is connected to a driving unit 5 to rotate the dust filter 1. A fan 108 is provided at the subsequent stage of the dust collection filter 1, and the air sucked from the suction port 102 is blown from the air outlet 110.
As shown in the electric wiring diagram of FIG. 2, the high-voltage power supply 107 is connected to the discharge wire 104, the water in the water tank 2 and the
Is connected to + (earth), and a high DC voltage of-voltage is applied.

The operation of the above configuration will be described below. The air containing the dust is sucked in by the fan 108 from the suction port 102, and the large dust is removed by the pre-filter 103, and the dust not removed by the pre-filter 103 passes between the discharge wire 104 and the dust collecting filter 1. Since a corona discharge occurs, the negative electrode is charged. The charged dust is collected by water adhering to the dust filter 1 by Coulomb force and ion wind. This is the dust filter 1
The water adhering to the dust filter adheres to the surface of the dust filter to some extent evenly to form a water film, so that the water film itself acts as an electrode plate, and the current flows from the discharge wire 104 to the ground which is the ground. Flowing into the membrane, ion wind is generated toward the water, and not only the ordinary Coulomb force but also the force of the ion wind is added, and the dust directly jumps into the water, dramatically improving the dust collection performance. it can. When the electrode plate is formed of metal, the ion wind flows in parallel from the electrode plate because it does not allow air to pass, but the dust filter 1 having air permeability and the water film itself serves as a ground. Therefore, the ion wind blows directly toward the water, and the dust collection performance can be improved. In addition, the dust collection filter 1 is rotated by rotating the shaft 3 at the upper end by the driving unit 5 and is immersed in the water of a part of the water tank 2 below the dust collection filter 1. Water is always attached. In addition, the dust collected by the water attached to the dust collecting filter 1 is washed by the water in the water tank 2 by rotation, and is dissolved in the water in the water tank 2. Dust collection filter 1
By constantly rotating, dust collection and cleaning
Water retention is performed continuously, and high dust collection performance can be maintained. Since the water in the water tank 2 is melted by dust by operating for a long time, maintenance can be easily performed by replacing the water with a new one. Then, the air that has collected the dust is used as clean air as the outlet 1
The air is blown into the room by the fan 108 from 10.

As described above, according to the wet type electrostatic precipitator of the first embodiment of the present invention, a water film is formed on the dust filter 1, thereby having a high dust collecting performance, and merely replacing the water in the water tank. Therefore, it is not necessary to clean the dust collecting filter, the dust can be continuously removed, and the operation can be performed at a low running cost.

Next, a second embodiment of the present invention will be described with reference to FIG. The same parts as those in the first embodiment are denoted by the same reference numerals, and description thereof will be omitted.

As shown in FIG. 3, the discharge wire 104 is installed in a space formed between the upper shaft 3 and the lower shaft 4 to which the dust filter 1 is fixed. And are arranged in parallel.

The operation of the above configuration will be described below. By providing the discharge wire 104 at a position sandwiched by the dust collection filter 1, the discharge wire 104 is discharged to the front and rear dust collection filters 1, and ionic wind can be generated in both. Therefore, the dust collection performance can be improved by doubling the dust collection area of the dust collection filter 1 that forms the water film.

As described above, according to the wet electric dust collector of the second embodiment of the present invention, the dust collecting performance can be improved.

[0030]

[0031]

[0032]

[0033]

[0034]

[0035] Next, a third embodiment of the present invention will be described with reference to FIG. The first embodiment and the second embodiment
The same parts as in the example are denoted by the same reference numerals, and description thereof will be omitted.

As shown in FIG. 4 , a charging section 106 composed of a discharge wire 104 and a parallel electrode plate 105 is
02 is provided at the subsequent stage.

By providing the charging unit 106 on the suction side of the dust collection filter 1 with the above configuration, the air containing the dust blown by the fan 108 is supplied to the charging unit 106.
Can be charged. Therefore, the dust is charged by the dust collection filter 1 and the discharge wire 104, but the dust collection performance can be improved by being charged in the previous stage.

As described above, according to the wet electrostatic precipitator of the third embodiment of the present invention, the dust collecting performance can be improved while maintaining the low pressure loss.

Next, a fourth embodiment of the present invention will be described. Although not shown in the figure, sodium hydroxide or a lower alcohol aqueous solution is used in place of water for forming a water film. With the above configuration, the dust filter 1 can be easily washed, and the water activity of the dust filter 1 can be easily kept uniform by the surface active force, so that the dust collecting performance can be improved. Therefore, dust can be collected efficiently, spark discharge can be prevented, and power consumption can be reduced.

In the fourth embodiment, sodium hydroxide or a lower alcohol aqueous solution is used instead of water. However, the sodium hydroxide or the lower alcohol aqueous solution may have a surfactant such as a neutral detergent. .

[0041]

As is clear from the above embodiments, according to the wet dust collecting apparatus of the present invention, dust is directly collected in water by applying a water film and a discharge wire to generate a corona discharge. It is possible to obtain high dust collecting performance, and since the dust once collected is dissolved in water, it is possible to prevent the dust from re-scattering. Moreover, it is possible to only flour dust exchanging aquarium water continuously removed, it is not necessary to perform cleaning or replacement of the filter of the filter, maintaining high dust collection performance at a low running cost. There is no need to install new water supply equipment such as a conventional wet dust collector,
It is possible to provide a wet type electrostatic precipitator in which a practically significant effect of simple maintenance can be obtained.

Further, it is possible to provide a wet-type electrostatic precipitator having an effect of easily improving the precipitating performance.

[0043]

Further, it is possible to provide a wet-type electrostatic precipitator having an effect of improving the precipitating performance with a low pressure loss.

Further, it is possible to provide a wet type electrostatic precipitator having an effect of preventing spark discharge and reducing power consumption.

[Brief description of the drawings]

FIG. 1 is a perspective view of a wet electrostatic precipitator according to a first embodiment of the present invention.

FIG. 2 is an electric wiring diagram of the first embodiment.

FIG. 3 is a perspective view of the wet type electrostatic precipitator of the second embodiment.

FIG. 4 is a perspective view of the wet type electrostatic precipitator of the third embodiment.

FIG. 5 is a sectional view of a conventional wet dust collector.

──────────────────────────────────────────────────の Continued on the front page (51) Int.Cl. ⁶ Identification code FI B03C 3/78 F24F 7/00 ZABB F24F 7/00 ZAB B03C 3/14 A (56) References , U) Actual opening 60-74747 (JP, U) (58) Fields investigated (Int. Cl. ⁶ , DB name) B03C 3/00-3/88 F24F 7/00

Claims (4)

(57) [Claims] A discharge wire provided on a suction port side inside the main body;
A dust filter provided downstream of the discharge wire, two shafts for fixing the dust filter to upper and lower ends inside the dust filter, and the shaft for rotating the dust filter. And a water tank containing water for immersing a part of the lower portion of the dust filter, and a fan that blows air vertically to the dust filter and blows air to an outlet. A wet-type electrostatic precipitator comprising a high-voltage power supply for applying a DC voltage to the discharge wire and the dust filter. 2. The wet type electrostatic precipitator according to claim 1, further comprising a discharge wire disposed inside the dust filter and parallel to the dust filter. 3. A process according to claim 2 Symbol placing wet electrostatic precipitator provided with a charging part comprising a subsequent stage of the inlet and discharge lines parallel electrode plates. 4. The wet electrostatic precipitator according to claim 1, wherein an aqueous sodium hydroxide solution or a lower alcohol solution is placed in the water tank.