JPS58114752A - Electrostatic ultrahigh performance filter - Google Patents

Abstract

PURPOSE:To provide a electrostatic ultrahigh performance filter which increases spark voltage, prevents clogging and improves dust collecting efficiency, by interposing spacers having insulation characteristics between a filter medium and respective separators. CONSTITUTION:Filter medium 9 such as glass fibers is placed zigzag in the direction intersecting orthogonally with the flow direction of a gas, and conductive separators 10, 11 of Al foil are disposed between the adjacent parts of the medium 9 so as to permit the passage of a dusty gas. Spacers 12, 13 having insulation characteristics are interposed between the separators 10, 11 and the medium 9 and the assembly is housed in a frame. An electrc circuit 15 for applying high voltage of DC upon the respective separators on the downstream side and grounding to the respective separators 10 on the upper stream side is provided to form dust collecting parts 16. The gas contg. charged particles by passing through the electrostatic charging parts 17 formed by grounded parallel flat plate electrodes 2 and ionizing wires 3 passes through the dust collecting parts 16. This filter is used for purification, etc. of air in a chamber.

Description

DETAILED DESCRIPTION OF THE INVENTION This is a 4ht) produced by Honyumeisha, which relates to an electrostatic ultra-high performance filter that is mainly used to purify indoor air.

Filters called 1 (EP filters) generally have high dust collection efficiency, but when passing dust-containing gas through them, the pressure loss is also high.

If you make the filter mesh coarser in an attempt to reduce pressure loss, the collection efficiency will decrease, and if you try to reduce the pressure loss by slowing down the ventilation speed, the filter size will increase. Yes, nine. There is also a disadvantage that the pressure loss due to rounding increases significantly and the life of the filter is short. For this reason, a method has been adopted to extend the life of the filter by providing a suitable pre-filter in the filter 0IIIiI.

In the present invention, as shown in the first WA and the second diagram, grounded parallel plate electrodes (2) are arranged and fixed in a vessel frame (1) through which dust-containing gas passes in parallel in the airflow direction, and each electrode (2) is arranged and fixed in parallel in the airflow direction. A charging section (4) formed by extending a discharge m1 (8) that applies a high voltage within an interval of K The F material (.) is arranged in a direction perpendicular to the spirit, that is, in a meandering manner so as to block the airflow, and a conductive separator ( 7) from the upstream and downstream sides of the air flow, and a dust collection section (@) that applies a high voltage between each separator on the upstream side and the separator on the downstream side, and a charging section. (4)
It has a structure in which nine dust particles are pre-charged with 300% and collected in the dust collection part (8), and the dust collection efficiency can be improved by 6 orders of magnitude compared to the conventional P material only. We are proud to have invented an electrostatic ultra-high performance filter that has extremely high yield and long life.

With this electrostatic type ultra-high performance filter K>, the spark voltage is independent of the distance hK between the material (6) and the material (6) caused by the separators (1) and (1) shown in FIG. As a result of the thickness t and the applied voltage Ki between the separators (7) e (7), the leakage current increases, and the power supply voltage may decrease, leading to a decrease in the collection vehicle capacity. When using glass delicate F material, JIII has a strong slope.

In the present invention, a binding spacer, for example, a steel material, is interposed between each separator and the furnace material to avoid direct contact between the separator and the furnace material, and to create a space gap between the dragon separators and the furnace material. By floating it above the furnace material, the spark voltage can be further increased, and the above-mentioned problems can be solved by providing an electrostatic ultra-high performance filter.

Hereinafter, the present invention will be described in detail with reference to aumr 4th to 12th ulK4. (9) is a piece of material made of glass fiber or the like, and is meandered in a corner direction perpendicular to the air flow direction of the impregnation gas. QO, (b) From the upstream and downstream sides of the metal gas airflow, the meandering furnace material (9) O is made of conductive seven pallets sandwiched between the adjacent parts, respectively, and aluminum foil, etc. Made of suitably conductive material, P material (9)
The mating parts of *a are supported so as to maintain a constant interval, and the parts are rounded and bent into a wave shape from the upper end to the lower end k to allow the passage of dust-containing gas into the ceramic gap. (2
), Ql is an insulating spacer interposed between the separator (2) and the V material (9) and between the separator (b) and the V material (9). Fold it in half and put a separator (1010m) in between.
It consists of individually sandwiched.

As mentioned above, each separator αQ and αKa are made of steel (B).

(To) The furnace material (9) inserted through the 5th! Store the trout in a Km frame as shown, and attach each separator (b) on the downstream side.
An electric circuit (a) is provided to apply a high voltage of Ka direct current and ground each separator frame on the upstream side to constitute a dust collector S-. (B) is a charging section, which has the same structure as the charging section (4) shown in FIG. 2, and is arranged so that the metal gas passing through this charging section (B) is sent to the collection aSαQ.

Next, to explain the action of the electrostatic ultra-high performance filter with the above configuration, the ionization m(a) of the charged part
(g) When gold layer gas is fed into the separator (b) K of Collection 11fMS (2) with a high DC voltage applied, the dust particles pass through each grounded parallel plate electrode body. In the process, most of the charged particles are first drawn to each separator QQK& on the upstream side.

It adheres to the surface of each separator and is removed.

This effect is most noticeable for charged particles with large particles. Next, the gas flow (6) containing the remaining charged particles passes through the net (9) in the shortest distance since the pressure loss through the net (9) is very large. This rounded airflow (6) is caused by the electric force IIa directed from the separator (b) to (to) as shown in Figure 8.
It is almost parallel to II4 and goes in the opposite direction. At the same time, airflow (
When passing through the net material (9), the speed of the dust collecting part (end) becomes extremely slow compared to the speed (headwind speed) upstream of the dust collection part (end). In this way, when the direction of the electric field and the direction of the air flow are reversed, the electrical movement speed of the charged particles (to), that is, the electric force *gI
Since the moving speed in the direction of J becomes greater than the speed of the airflow passing through the netting material (9) and the netting materials (2) and (b), the charged particles (to) cannot enter the inside of the netting material (9). . On the other hand, since the airflow speed outside the mesh material (9) is high, the charged particles eventually settle in a porous manner on the surface of the mesh material (9). Next, the charged particles (2) that have not been deposited in a porous manner but have entered the net material (9) are transferred to the separator (to).

(b) Due to the electric field applied between the net material (9), the inner volume seen in the fibers increases dramatically as they move along the lines of electric force converging on the fibers of the netting material (9).

Due to the above dust collection mechanism, the dust collection efficiency is significantly increased, and clean gas flows out from the outlet of the dust collection section. Since charged particles with large particle diameters are more effectively collected in each separator, there is less clogging inside the F village, and the life of hemorrhoids can be significantly prolonged.

In Example II above, an example is shown in which both separators QQ and (B) are sandwiched between each of the two folded net materials (2) # (to). It is also possible to sandwich the blade between the steel members. Nine net materials (
(to) and (to) are net materials (9) that meander as shown in Figure 9 without sandwiching the separators (to) and (b) individually.
By running it in a meandering manner along both sides of the net material (9) and making it meander along one side of the meandering net material (9) as shown in Figure 10,
It may be interposed at the threshold between each separator (1) and (2). In the above embodiment, an example is shown in which a polyethylene net material is used as the insulating spacer 1, and the present invention is not limited thereto. In that case, the size of the mesh and the vents are determined as appropriate within the range that allows the passage of the gas containing gas.

In the present invention, as an insulating spacer, an insulating layer (2) is formed by coating and pasting an insulating material on the peaks of the separators (2) and (b) as shown in Figure 11. It is also possible to apply or paste an insulating material only on the part of the mesh surface of the mesh material (9) where the peaks of the separator (to), Q]) touch, as shown in Figure 12. It is also possible to form the insulating layer 4 using the same method. These insulating layers (
2) Or, since it covers the peak of the separator where the electric field is most concentrated, the spark voltage becomes extremely high. ,
Furthermore, since there is no direct contact with the material, the insulation performance will not deteriorate due to the effects of temperature and humidity.

A space gap is formed by the spacer (b) and (2) between both of the ter Ql) and 010 and one of the 9
Immediate contact with the separator (b) with the net material (9) is avoided, and the spark voltage is equal to the thickness of the net material (9) plus the spacer thickness t' and the separator oOe.
It is determined by the high voltage VC applied to the aI gate. Therefore, even if the electrical insulation resistance of the mesh material decreases due to high temperature or humidity, the leakage current is small and the power supply voltage does not drop, and the trench spark voltage is further increased, which increases the separator resistance. Since a voltage is applied, not only the collection efficiency can be increased, but also the safety factor can be increased by applying a high voltage between the collectors.
It can be used without being affected by product term conditions such as temperature and humidity at the installation location. If the conductive separator of a round can is covered with a rope material, there may be accidents such as the separator hitting the netting material during production and tearing, or the separator on the upstream shaft and the separator on the downstream side coming into contact with part of the separator and shrinking. There will be no accidents. In addition, when a spacer such as a net material is inserted, there is almost no increase in pressure loss due to the addition of spacers, and the net material can be made of cheaper materials than P#, which has the advantage of reducing material costs. has.

[Brief explanation of the drawing]

Figure j11 is a schematic diagram showing the conventional electrostatic ultra-high performance filter O#R, No. 2 - A line diagram of the Kodo filter, No. 6 - is a schematic diagram showing the positional relationship between the net material and separator of the same filter, 4th to 12th show actual IM images of the present invention 4
0, Figure 4 is a perspective view showing the straight shape of the separator inserted into the net material - 9 Figure 5 shows the charged heat and the l1 angle of the collecting part 6 - is a diagram showing the relationship between the furnace material, net material, and separator 0-position koji, [Figure 7 is the air flow o*H of the impregnated gas passing through the dust collection section, and No. 8- is the direction of movement of charged particles as they pass through the f material. Fig. 9 shows an example in which the net material is installed inside the net material, and Fig. 1 shows an example in which the net material is installed on one side of the net material. -,t! Figure S11 shows an example in which an insulating layer is formed on the mountain part of a separator as an insulating spacer, and nine examples in which an insulating layer is partially formed in the direction of the net material as an insulating spacer. (9)...-material, 00, am)---conductive separator, (2), (2)...insulating spacer,
(B)...Collection section, (Foundation)...Charging section, @, ■...
・Insulating layer. Figure 1 Figure 2 [ Figure 3 Figure 4 II Figure 5 Figure 7 Figure S q/3 Figure 2 Figure 1θ Figure 1/Figure 12 Figure 10, 1/

Claims (1)

[Scope of Claims] (1) A charging section that charges the paper dust particles by a discharge that causes dust-containing gas to pass therethrough, and a furnace configured to block the airflow of the dust-containing gas that passes through the charging section. The materials are arranged in a meandering manner, and a conductive separator that allows the passage of dust-containing gas is placed between the adjacent parts of the P material from the upstream and downstream sides of the air R so that the company name is included. Insert each separator on the upstream side. In an electrostatic ultra-high performance filter that is constructed by applying a high voltage to each separator on the downstream side, an insulating spacer is placed between the conductive separator and the scissor P material so as not to obstruct the passage of gas. An electrostatic ultra-high performance filter. (2) The electrostatic charge according to claim 1, which is formed by interposing an insulating spacer i between each separator on the upstream side and the furnace material, or between each separator and the furnace material of the Morikawa joint. Formula ultra-high performance filter 1, -0 (3) Patent in which the insulating spacer is made of an insulating mesh material such as plastic steel - OI sought! The electrostatic ultra-high performance filter described in Section 1 or Section 2. (4) A patent-requested ultra-high-performance electrostatic filter consisting of an insulating layer in which an insulating spacer is formed on the mountain portion of a separator. (&) The electrostatic ultra-high performance filter according to claim 1, wherein an insulating spacer is formed at a portion of the furnace material ai1O where the peaks of the separator come into contact, and comprises a nine-layer edge layer. (6) The electrostatic ultra-high-performance filter according to any one of claims S1 to S, wherein separators are individually sandwiched between insulating ropes. (1) A patent claim in which an insulating rope is made to meander together with the furnace material along both sides of the furnace material! 1. The electrostatic ultra-high performance filter according to any one of items 1 to 6.