JPS5814963A - Electrostatic filtering apparatus for contaminated oil - Google Patents

Abstract

PURPOSE:To improve filtering ability and to enable the assured discharge of sludge, by stretching linear cathode wires against anode plates, dropping sludge adherent to the cathode wires by its own weight, and then removing the dropped sludge outside a vessel by a bucket or the like. CONSTITUTION:A filtering vessel 1 is filled with contaminated oil, and high- voltage is charged between anode plates 8 and cathode wires 9 so that dust in the oil is let adhere to the peripheries of the cathode wires 9 by the generated static electricity. With the increase of volume, the adherent sludge is dropped by its own weight. At the bottom of the filtering vessel 1, a conveyer provided with many L-shape buckets 13 is intermittently driven to carry the dropped sludge outside the vessel by the buckets 13. The sludge adherent to the buckets 13 is removed by a brush 15 outside the vessel. The removed sludge is received in a receiving box 18. On the other hand, the purified oil is taken out from a spout 4 through a couple of support plates 5 provided with numerous small holes.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a device that uses static electricity to remove pollutants such as dust from contaminated oil after use, such as electrical discharge machining oil or cutting oil. This system is designed to automatically discharge the sludge stored in the tank to the outside of the tank.

Conventionally, it is well known that filtration is performed using static electricity, and if a high voltage is applied between the anode and the cathode, dirt will be prevented from adhering to the cathode and contaminated oil can be filtered. There are problems in the disposal of filth, and various methods have been proposed for removing it. For example, the cathode is installed as a conveyor, and a part of the conveyor is guided outside the filtration tank, where the stuck sludge is removed.However, the conveyor is plate-shaped and has the disadvantage of slipping when rotating. Moreover, since it moves, its adsorption capacity decreases, and there are also problems with filtration efficiency.

Therefore, in this invention, the cathode is made of a wire, and the sludge adhering to the wire is made to fall by its own weight, and the fallen sludge is
, m packets are guided out of the filtration tank by a chain conveyor and discharged outside the tank by a brush.

Hereinafter, an embodiment of the present invention will be explained.As shown in the drawings, a filter tank (1), an oil filler port (2) and a pump (3) are provided.
) and a discharge port (4) formed by a pipe hanging down into the tank (1), and a pair of support plates (5) with numerous small holes in the filter tank (1) facing each other. Set it upright and attach both support plates (5
) (5) Place the horizontal member (7) on top via the insulator (6).
(7) is fixed in parallel to each support plate (5) (5), and from both horizontal members (7) (7), a plurality of plate-shaped lli electrode plates (8) are attached to both support plates (5). ) (5) Place parallel ICs at intervals in the space between them, and then lower both support plates (5> (5)
A plurality of cathode rays (9) made of nichrome wire are strung in each space between each anode plate (8). Note that the nichrome wire was selected because it has excellent corrosion resistance, and other corrosion-resistant conductor wires may be used. In addition, cathode rays (
A spring 00 is interposed at the connection between the support plate (6) and '9), but this is used to prevent the wire from being cut during transport of this device, and has nothing to do with the filtration function. .

Next, the conveyor (b) has a large number of L-shaped packets (to) fixed at intervals between a pair of left and right endless chain sides (b), and the filtration tank (1) below each anode plate (8). ) runs in one direction along the bottom of the filtration tank (1), rises along the side wall of the filtration tank (1), and is stretched so as to be guided to the outside of the filtration tank (1). Each type of packet (
It rotates intermittently at every pitch between (to). Furthermore, on the outside of the tank of the conveyor, a circular brush with fibers planted radially from the shaft core is supported by a support shaft alc installed parallel to the longitudinal direction of the L-shaped packet. By driving the target, the brush (2) is provided so as to be able to reciprocate along the L-shaped bucket) (L%), and the brush (2)
A storage box (to) for receiving sludge protruding from the filtration tank (1) is provided below the filtration tank (1), and the storage box @ is connected to the inside of the filtration tank (1) by an oil return path (2).

Incidentally, the filter tank (1), the chain 4 of the filter (b), the packet (to), and the support plate (5) are all made of conductive material, and serve as a cathode for the anode plate (8).
This invention has the above structure, and if the tank (1) is filled with contaminated oil and a high voltage is applied between the two electrodes, static electricity is generated and particles such as dust in the oil are transferred to each cathode line. When the sludge begins to adhere to the phase (9) and the amount increases, the adhered sludge falls under its own weight and is stopped in the L-shaped packet (to) of the conveyor αp. do. On the other hand, since the conveyor (B) rotates intermittently, it is sequentially transferred to the outside of the tank (1) according to the rotation, and the brush (G) reciprocates outside the tank (1). ), the sludge that adheres to the L-shaped packet (to) is removed. The above removal operation is repeated and the purified oil is taken out from the discharge port (4). .

Therefore, according to the filtration device of the present invention, a linear cathode ray is installed opposite to the anode plate, and the sludge that has adhered to the cathode ray falls under its own weight, and particles such as dust in the oil are collected. In addition, the fallen sludge is transferred to the outside of the tank by a conveyor using a chain and an L-shaped packet, and is discharged from the packet by the reciprocating movement of brushes outside the tank. Therefore, the discharge is reliable, the structure for discharge is simple, and it can be provided at low cost.

[Brief explanation of the drawing]

The drawings show an electrostatic filtration device for contaminated oil according to the present invention, in which Fig. 1 is a sectional view seen from the front side, Fig. 2 is a sectional view seen from the side side, and Fig. 3 shows a part of the conveyor and the brush. It is a perspective view showing an erection state. (1)・1j tank, (2)・・Refueling port, (3)・・・ump, (4)・・・discharge port 1 (5) °° base plate 5 (6)・・insulator, (7)・・Horizontal member, (8)・・Anode plate, to)・
・Cathode ray, fabric...spring, a◇...conveyor, (2
)...endless chain, (to)...L-shaped packet, α→...
・Motor, (2)...Brush, 0 o'clock...Spindle, Qno...
・Cylinder, (to) ・Storage box, α ・・Return oil route 1
1 4 Figure 2

Claims (1)

[Claims] A plurality of plate-shaped anode plates (8) are vertically arranged in parallel at intervals in the filter tank (1), and cathode rays (9) each having a plurality of filaments are placed between each anode plate (8). ) and a pair of left and right endless chains ■ (6) between which many L@buckets) (
A conductive conveyor (b) for discharging sludge, which is installed at intervals of 2), is connected to the anode plate (8) in the filtration tank (1).
) runs in one direction between the lower end of the tank (1) and the bottom of the tank (1), rises along one side 11 of the tank (1), is guided outward from the tank (1), and is spread far-like. At the same time, it is provided so as to be able to rotate intermittently, and a bra V (to) can be reciprocated along the longitudinal direction of the L-shaped packet (2) on the part of the conveyor (b) that protrudes outside the tank (1). Electrostatic filtration equipment for contaminated oil.