JP2008302352A - Apparatus for treating liquid waste by using effect of electric charge - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide an apparatus for treating liquid waste by using an effect of an electric charge, one unit of which can corresponds to the conventional apparatus which is used for removing mixed foreign matters (dust, mineral oil and water) so that the service life of a treating liquid such as a machining liquid is prolonged to decrease industrial waste and impurities are decreased to stabilize the quality of the treating liquid and in which dust removal and oil separation are performed separately. <P>SOLUTION: The apparatus for treating liquid waste by using the effect of the electric charge includes: a treatment tank 12 in which the liquid to be treated is put; a plurality of electrode plates arranged in the treatment tank at regular intervals; and a power unit for impressing a voltage between the adjacent ones of the plurality of electrode plates. A dust collecting body 20 comprising many voids surrounded by a fiber having flexibility, elasticity and electrifiability is arranged between the adjacent electrode plates. A discharge port-bored plate having electric non-conductance is arranged above the dust collecting body to be moved freely to the vertical direction so that the amount of the dust to be captured by the dust collecting body can be detected from the outside. <P>COPYRIGHT: (C)2009,JPO&INPIT

Description

  The present invention relates to a waste liquid treatment apparatus using a charging effect.

  Currently, mineral oils and water-soluble liquids are used as processing fluids for metal processing, but when these fluids are used, they are regularly replaced by processing powder, moisture, oil contamination or decay, and industrial waste. It is processed as.

Conventionally, this filter was removed using a filter to remove this contaminant, but secondary contaminants were generated because this filter was replaced by clogging and processed as industrial waste. Although a charge flocculation filtration apparatus (see, for example, Patent Document 1) has existed, a waste filter has finally been generated in order to remove contaminants with the filter. In addition, there is a device for capturing minerals with a dust collector that is charged with DC 10 KV for mineral oil, but the dust collector is used up and waste is generated.
Japanese Patent Laid-Open No. 7-8963

  Remove contaminants from the waste liquid from the problem of protecting the natural environment, reduce the generation of industrial waste due to the long life of the processing liquid, and stabilize the quality by using the processing liquid with less impurities. (Dust, mineral oil, water) was removed, and there was a device that can handle garbage and oil / water separation in the past, but there is no device that can handle it alone, and the conventional device mainly used a filter. As shown in the conceptual diagram of the filter in FIG. 5, fine contaminants that cannot be captured by the mesh size cannot be captured, and the degree of dust collected by the filter cannot be detected from the outside, and is detected by filtration pressure. It was.

  A treatment tank containing a liquid to be treated, a plurality of electrode plates disposed in the treatment tank at intervals, and a power supply device applied between adjacent electrode plates of the plurality of electrode plates. Between the mating electrodes, a dust collector consisting of a large number of voids surrounded by fibers having flexibility, elasticity, and electrification is interposed, and has an electrically insulating property on the top of the dust collector, A waste liquid treatment apparatus using a charging effect, characterized in that a plate having a discharge port is provided so as to be movable up and down, whereby the amount of dust trapped by the dust collector can be detected from the outside.

  In the treatment tank containing the liquid to be treated, between the opposing electrode plates, as shown in FIG. 6, a dust collector consisting of a number of voids surrounded by electrically charged fibers is interposed. When electricity is applied between the opposing electrode plates, the zeta potential on the surface of the contaminants in the liquid to be treated sucked into these voids is neutralized, causing the contaminants to aggregate and coarsen, and to have charging properties. Since the dust collector made of a substance is charged, as shown in FIG. 4, contaminants such as coarse dust and dust are attached to and captured by the dust collector. Therefore, since it is not trapped with a mesh size unlike a filter, it is possible to trap even fine contaminants regardless of the size of the contaminants.

  In addition, when oil / water separation is intended, oil droplets adhere to the dielectric dust collector, and the oil droplets of oil-containing water sent by the pump adhere to the dust collector one after another, increasing the volume, resulting in a difference in specific gravity. To surface. At this time, since the flow of the liquid is made to hit the floating oil once, the coarse oil droplets are replaced with the floating oil, and the oil layer on the surface becomes thicker and finally from the oil outlet As a result, the treatment liquid can be separated into oil and water. If a float suction that floats on the liquid level in the treatment tank is attached, it becomes a floating oil recovery device.

  Further, since the filter is replaced by clogging and processed as industrial waste, secondary contaminants are generated. The dust collector according to the present invention has elasticity as shown in FIG. If a dust collector larger than the size between the mating electrodes is pushed in, it can be fixed by its repulsive force, so that it can be easily attached and removed, and has flexibility, so as shown in FIG. Dust can be easily cleaned and reused.

  In addition, a lid plate with an electrically insulating drain opening is provided at the top of the dust collector so that it can be moved up and down, and the passage of the processing liquid is reduced depending on the degree of dust collection. Water pressure is applied to the lower part of the body, and the water pressure and amount of water in the treatment tank change, and the dust collector moves upward accordingly. Therefore, if the lid is provided with a detection switch, the dust collected by the dust collector It is easy to detect when the dust collector is removed and cleaned.

  DESCRIPTION OF THE PREFERRED EMBODIMENTS Embodiments of the present invention will be described below with reference to the drawings. FIG. 1 shows an overall perspective view of one embodiment of a waste liquid treatment apparatus using a charging effect embodying the present invention, and FIG. FIG. 3 shows a view taken along the line BB in FIG. 1, and FIG. 6 is an overall perspective view of the dust collector. The waste liquid treatment apparatus 10 according to the present embodiment includes a treatment tank 12 into which a liquid to be treated is placed, counter electrode plates 14 and 16 disposed in the treatment tank 12 at intervals, and the counter electrode plates 14 and 14. A large number of fibers 15 surrounded by fibers 15 having flexibility, elasticity, and chargeability are disposed between a power supply device 18 that applies a voltage to 16 and generates an electric field in the liquid to be treated, and the counter electrode plates 14 and 16. The dust collector 20 shown in FIGS. 6 and 7, which is a space and is larger than the distance between the electrode plates 14 and 16, is pushed between the electrode plates 14 and 16, and is fixed by the repulsive force of the electrode plates 14 and 16. As the material of the fibers constituting the dust collector 20, there are flexible, elastic, and high dielectric constant materials such as urethane, fluorine resin, urea resin, phenol resin, and polyester resin. used.

  As shown in FIG. 3, one electrode 14, 14 and a partition plate 22 are fixed inside the processing tank 12, and the processing tank 12 itself becomes one electrode, and the other electrode 16, 16 is fixed to the substrate 24. A water supply pipe 28 that is fixed to the inside of the treatment tank 12 through the insulator 26 and that introduces a liquid to be treated is provided at the lower portion. A discharge pipe 34, an opening 35 for preventing the liquid from flowing out due to siphon phenomenon, and an open / close valve 36. The liquid to be treated is fed into the water supply pipe 28 evenly between the electrodes. As shown, the discharge ports 38 and 38 are transparently provided, and an oil collecting unit 40 and an oil discharge pipe 42 are provided at the top of the processing tank 12 so as to discharge the separated oil, and a transformer 44 for changing the voltage is provided. Is provided.

  FIG. 4 is an enlarged view of the main part of the present embodiment, and the liquid to be treated which is fed from the discharge ports 38 and 38 and includes the dusts 46 and 46 and the oils 48 and 48 is a large amount of the dust collector 20. Since the dust collector 20 is electrically charged and is interposed between the electrodes 14 and 16, when the opposing electrodes 14 and 16 are energized, the dust collector 20 is placed on the surface of the contaminant in the liquid to be treated. Since the zeta potential is neutralized and contaminants such as dust and dust 46 and 46 are agglomerated and coarsened, and the dust collector 20 made of charged fibers is charged, the coarse dust and dust, The contaminant 50 such as the above adheres to and is captured by the fibers of the dust collector 20, the oil droplets 48 adhere to the dust collector 20, and the oil droplets 48 of the oil-containing water sent by the pump 30 one after another. The oil droplets 52 adhere to the surface and become coarse oil droplets 52 which are pushed out in the liquid flow direction and float up due to the difference in specific gravity. Oil-water separation is possible because accumulated in the.

  With the above configuration, the processing liquid sucked by the pump 30 passes through the discharge ports 38 and 38 and is dispersed in the processing tank 12 and rises from below the electrodes 14, 14, 16 and 16. Electrodes 14 and 16 are provided with electrified dust collectors 20. When the electrodes 14 and 16 are energized, dust and dust are captured by the charged dust collectors 20, and mixed oil droplets are coarsened and rise. Then, the liquid that has passed there passes through the partition plate 22 to the discharge pipe 34, and by adjusting the open / close valve 36, the position of the oil layer formed on the surface of the treatment tank 12 is changed and floated. The oil is discharged from the oil collecting section 40 and the oil discharge pipe 42, and the processing liquid from which the oil, dust, and dust are removed is discharged through the discharge pipe 34, so that the contaminated foreign matter and mineral oil that cause corruption are removed. Removed at the same time. Further, when the electrodes 14 and 16 are made of copper or a copper plate is placed on the electrodes 14 and 16, copper ions spring out and can be sterilized by a trace metal effect. When the dust collector 20 is filled with dust and dirt, the dust collector 20 that is pushed in between the adjacent electrodes 14 and 16 and is fixed by the repulsive force due to elasticity can be easily taken out, and further Since the dust body 20 has flexibility, it can be used repeatedly by washing with water or a cleaning liquid as shown in FIG. 8, and a filter or the like treated as waste does not occur. The charge voltage of the aqueous solution is considered to be suitable in the range of AC 5 to 50 V, and for mineral oil, the range of DC 50 to 10 and 100 V. In addition, since a large amount of contaminated material 50 such as dust and dirt adheres to and is captured by the dust collector 20 and a bridge is formed between the electrode plates 14 and 16, one of the electrode plates A dielectric 54 such as a vinyl chloride plate is attached to 16 (or electrode plate 14).

  Further, when the dust collectors 20 and 20 capture a large amount of the contaminant 50, the passage of the processing liquid is reduced, and the pressing pressure of the pump 30 is applied to the lower part of the dust collectors 20 and 20, so that the dust collectors 20 and 20 are lifted. Therefore, in order to prevent this, a presser plate 58 that is electrically insulative and has a discharge port 56, 56 formed through the dust collectors 20, 20 is provided so as to be movable up and down. As a result, the water pressure in the space 60 formed between the lower surfaces of the dust collectors 20 and 20 and the bottom surface of the treatment tank 12 is increased, so that the following clogging detection method is available.

  A water pressure gauge 32 or a pressure switch is provided in the water supply pipe 28 to detect the degree of clogging. As another method, since the presser plate 58 is pushed up, a push switch 62 is provided so that an electric signal is output when the presser plate 58 is pushed up to a predetermined height. As another method, a flow switch 64 is provided in the discharge pipe 34 to detect a decrease in flow rate due to clogging.

  As a detection method that does not use the increase in the water pressure in the space 60, the electrodes 14 and 16 are connected by electric wires via a transformer 66 and an ammeter 68, and when dust or dust is attached to the dust collector 20, the electrodes 14 and 16 are connected. As a result, the clogging is detected.

  The whole perspective view of one Example of the waste-liquid processing apparatus using the charging effect which implemented this invention is shown.   The AA arrow line view of FIG. 1 is shown.   The BB arrow line view of FIG. 1 is shown.   The principal part enlarged view of a present Example is shown.   A conceptual diagram of the filter is shown.   The whole perspective view of a dust collector is shown.   The state which interposed the dust collector between electrodes is shown.   Shows the state of washing out contaminants using the flexibility of the dust collector.

Explanation of symbols

DESCRIPTION OF SYMBOLS 10 Waste liquid processing apparatus 12 Processing tank 14 Electrode plate 16 Electrode plate 18 Power supply device 20 Dust collector 22 Partition plate 24 Substrate 26 Insulator 28 Water supply pipe 30 Pump 32 Water pressure gauge 34 Drain pipe 35 Opening 36 Open / close valve 38 Drain outlet 40 Oil collection Part 42 Oil discharge pipe 44 Transformer 46 Dust, dust 48 Oil drop 50 Contaminated matter such as coarse dust, dust, etc. 52 Coarse oil drop 54 Dielectric 56 Discharge port 58 Presser plate 60 Space 62 Push switch 64 Flow switch 66 Transformer 68 Ammeter

Claims (2)

  A treatment tank containing a liquid to be treated, a plurality of electrode plates disposed in the treatment tank at intervals, and a power supply device applied between adjacent electrode plates of the plurality of electrode plates. A waste liquid treatment apparatus using a charging effect, characterized in that a dust collector consisting of a large number of voids surrounded by fibers having flexibility, elasticity, and charging properties is interposed between electrodes.   An electrically insulating plate on the top of the dust collector and a plate with a discharge opening are provided so that it can be moved up and down, so that the amount of dust trapped by the dust collector can be detected from the outside. The waste liquid processing apparatus using the charging effect according to claim 1.

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