JPS5919564A - Method and apparatus for electrostatic dust removal - Google Patents

Abstract

PURPOSE:To obtain the functions of electrostatic dust precipitation and dust filtration with a simplified structure, by using a porous dielectric body as a partition plate between electrodes for the electrostatic dust precipitation, and impressing high voltage between the electrodes. CONSTITUTION:A filter element 2 prepd. by rolling a plurality of sheet filters composed each of a porous dielectric body, e.g. urethane foam, having one surface on which a thin metal film such as Al has been formed into a cylindrical shape is provided at the center of a case 1. When high voltage is impressed between adjacent electrodes by a DC high-voltage power source 8, fine particles such as dust floating in an air stream A sucked in through a suction hole 4 are not only physically captured in the small pores of the filter element but also electrostatically captured since they are charged with electricity by friction with the filter element as the dielectric body.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to an electrostatic dust removal device using a porous line electric body as a field spacing plate.

In order to remove minute particles floating in exhaust gas, etc., the most common method is to pass the gas through a porous material to collect the particles. However, this method requires that the particle collection material υ pore size be less than a certain value υ), and the thickness of the collection material 7) must be increased; rubbing increases the resistance of the fluid passing through it and reduces the pressure loss. There were problems such as increasing the dust removal capacity by 1 moss, and there was a limit to the dust removal capacity.

On the other hand, the υ particles in the gas to be removed are charged in the corona discharge region, and the gas is passed between the plates to which a high voltage is applied.
Electrostatic dust removal, which electrostatically attracts and mixes charged particles, has also been used for smoke pollution removal and other purposes. This υ method has the following features: 7) It can collect up to υ fine particles with a diameter of approximately 01μ, and the pressure loss due to removal is heavy and small.

However, it is necessary to provide a corona discharge part and a collection part, and the @ modification is complicated. However, on the plate (the accumulated particulates υ)
) Discharge occurs due to the concentration of the electric field, and the collected particles 1-7 are scattered again, resulting in the phenomenon of scattering, and there is also the disadvantage that the device tends to be large-sized.

According to the present invention, a porous dielectric material υ of a certain thickness is provided with a ``electrode'' on both sides, and an electric field is applied to the porous dielectric material υ. This is an attempt to provide a new film removal system that combines the advantages of method O but does not have its drawbacks.

Details will be explained below with reference to the drawings.

FIG. 1 is a cross-sectional view of one embodiment of the dust removal device of the present invention, in which a filter element 2 is disposed in the center of a case 1'7), and an intake air flow A is sucked from a fan 3) through an intake hole 4. In order to prevent the inflowing filter element from being washed out, a filter bag 5 is arranged to collect the coarse dirt.

The filter element 2 is made of urethane 7 as shown in FIG.
Porous holes such as Ohm are made by winding a plurality of filtration materials with a metal thin film 7 of dielectric material 6υ and 1 At into a cylindrical shape as shown in Fig. The high voltage power supply 81 can apply a high voltage. l (J-ke filter element support net.

In such a configuration, fine particles such as dust floating in the airflow A taken in from the intake hole 4 are physically trapped in the pores of the filter material, and are also separated from the filter material, which is a dielectric material.
) q is charged by rubbing, and it is also captured t'.

Since the filter element O needs to be relatively small, the loss of pressure can be reduced.

In addition, in order to apply an electric field, 7) the electric field is made of porous material 67
) is a metal thin film 7 formed on top of the dielectric material 67). I was able to place my opponent and was held by Ganji. For this reason, in the filter element;
A uniform tonic field can be formed.

In addition, there is no need for a υ corona discharge part to charge the dust like in the conventional O electrostatic dust remover υ, and the air flow path length and swell ratio are large, and the charged particles are attracted by a small amount of electrostatic attraction. Because it is trapped on the passage wall by displacement, the collection efficiency is extremely high, and the O
Moreover, the space between the electric kettles is insulated with a dielectric material, so there is no possibility of short circuit discharge due to accumulated dust.

Therefore, by reducing the thickness of the foamed dielectric material 7) and reducing the field spacing, the applied voltage can be lowered by several minutes υ-11 compared to a normal static eliminator. .

It is preferable that the filter elements are manufactured in the following manner.

Figure 4: In the example shown in Figure 1, 6 sheets of At foil 71t coated with paraffin on one side are stacked, heated to a temperature at which the paraffin melts by heating i11, and pressed lightly. This will bond the two together. When you get the hang of it, make the width of the At foil υ a little smaller than the width of the filter sheet O.
Both sides) Leave a part 61 where the filter material 6 is not in contact with the filter material 6. Then, cut the filter material 6 along the center of the filter material 6, and add this to the second layer.
As shown in Figure υ), fabricate the filter element 2 by overlapping and rolling them together. In this way, each electrode (the adjacent tun-in υ edges are applied to the opposite υ surface) and the terminals 9 connecting the side edges are provided, and each electrode (to which a voltage is applied) is provided. 7) One thing is convenient.

FIG. 5 shows an example of an apparatus 01 for applying paraffin to one At foil, and the At foil pulled out from the At foil supply roll 12 is preheated by a preheating fan 13 and then heated by a heating heater 14 for approximately 500 ms.
The paraffin comes into contact with a rotating coating roll 16 in a paraffin bath 15 kept at a temperature of 0.degree.
It is wound up at 8. After this, the take-up roll is as shown in Figure 4.
Although one piece of foamed filter material is adhered to the foamed filter material, it is also possible to adhere the foamed filter material to the filter material immediately after applying paraffin, and then roll it up together with the filter material. 7) The cooling fan 17 and heater 9Vi can be omitted.

The formation of the V-removal layer on the dielectric foam filter material is not limited to the above-mentioned example, but may also be performed by vacuum deposition. When getting the hang of H evaporation (r-to make it easier, it is preferable to leave it in a cloth for 1 to 7 hours. After the paint film dries, an At or Zn film is vacuum-deposited on the surface of the film.As described above, the present invention can be removed using a static dust remover and a filter during a night shift. It is a motsu that has achieved the 4 advantages of the shin pupil, and it also has the above-mentioned υ (
Filter media can be easily mass-produced, and can be easily removed when efficiency decreases due to clogging, etc.
It is also υ that can be replaced and always maintain high dust removal efficiency.

Due to its low cost and low applied voltage, it can be used in fields where conventional electrostatic dust removers cannot be applied. , incorporated into wind fans, etc. 5 Asthma-causing pollen,
Collects dust, etc. - [Keeps the indoor environment clean, etc.]
It can also be used as a household air purifier to collect cigarette smoke and oil.

It should be noted that the present invention is not limited to the above-mentioned embodiments, but the present invention is not limited to the above-mentioned embodiments. Alternatively, it is also possible to form a filter by cutting the sheets into strips and overlapping them.Furthermore, the strips υ and υ can be overlapped to form a filter.
Various υ design changes are possible, such as using a board instead of paper to reduce filter exchange @υ costs.

[Brief explanation of drawings]

Fig. 1 is a sectional view of the embodiment υ of the present invention υ dust removal device v1, @2
Figure 3 is a perspective view without showing the structure of the filter element, Figure 4 is an explanatory diagram of the method of adhering metal foil to the filter material, 15
The figure is also a schematic diagram of the paraffin coating method on metal foil @'7). l: Case 2: Filter element 3: Exhaust fan motor 5: Filter bathog 6: Molded foam filter material
7: Metal electrode film 8: DC high voltage power supply 9: Terminal 1o:
Branch network 11: Heater 12: At foil supply roll 15:
Balafin bath x6: m cloth roll 18: Volume W roll Special pestle Applicant: Hajime Yanagawa, representative from Odejo, patent attorney: Fumi Sato (and 1 other person)
Name) Figure 1 Tate 2 Figure 9 Figure 3

Claims (1)

[Claims] l) By passing through a porous dielectric material to which a strong electric field is applied, fine particles suspended in a gas are removed from the porous dielectric material)
2) A filter for collecting fine particles in the passing gas is formed by a porous dielectric material, and the filter is formed by sandwiching the dielectric material in the υ direction of the passing gas flow. An electrostatic dust remover equipped with an electric dropper (to form an electric field) at right angles to
Claim 7) Scope 2 υ Static electricity removal device 4) 4il @ Foil electrode is porous. Claim 7) Scope 3 υ Dust removing device characterized in that one elongated sheet of the body is glued with paraffin.