KR20030015095A - Electro-dewatering system of filter press - Google Patents

Abstract

PURPOSE: Provided is a dehydrating apparatus, particularly an electro-osmotic pressure filter press capable of effectively removing bound water from sludge generated during wastewater treatment processes by using electro-osmotic pressure and discharging vapor generated by Coulombic heating during the dehydration process, thereby obtaining sludge cake with low moisture content. CONSTITUTION: The dehydrating apparatus of an electro-osmotic pressure filter press comprises a fixing plate(2) with a sludge supply hole(5a) through which sludge is supplied into filter cloths, a compressing plate(4) which is separately installed from the fixing plate(2) and slidingly moves toward the fixing plate(2) by a cylinder(3) to compress filter plates(5) installed between the fixing plate(2) and the compressing plate(4), a plurality of filter cloths(6) arranged every between adjacent filter plates(5), positive electrodes(15) installed in the respective filter cloths(6), negative electrodes(12) installed outside the respective filter cloths(6), a power supply(11) for intermittently supplying a power to the electrodes(15)(12) at intervals of 1/1000-1/30 to induce electric field between the positive and negative electrodes(15)(12), and a vacuum pump(17) for discharging vapor generated by Coulombic heating during the operation of the compressing plate(4).

Description

Electro-osmotic filter press dewatering device {Electro-dewatering system of filter press}

The present invention relates to an electroosmotic filter press dewatering apparatus, and more efficiently removes the bound water contained in the sludge by the co-osmotic pressure generated by the application of an electric field to the sludge generated during various sewage and water treatment. It is an object of the present invention to provide a dehydration apparatus which can discharge water vapor generated by dehydration during dehydration to reduce the moisture content on the dehydrated cake finally obtained.

As a dewatering apparatus widely used in the related art, a filter press using a pressing force, a vacuum dehydration by vacuum, and a centrifugal dewatering by centrifugal force may be mentioned.

In the case of the conventional dehydration apparatus as described above, the water content of the final sludge has a very high problem because the bound water ion-bonded to the surface of the sludge particles cannot be removed but only the free water that is easily dehydrated.

In order to solve the problems described above, the electric dehydration apparatus is open. Looking at the configuration thereof, sludge is interposed between the filter plates to place the filter cloth for discharging the filtrate, and the positive and negative plates are installed outside the filter cloth. In this case, most of the particles having the (-) property are moved toward the (+) electrode plate, so that the overcrowding of the particles in the filter cloth is increased, thereby preventing the filtrate discharge part, thereby reducing dehydration. In addition, in the dehydration device, the positive electrode plate which is continuously supplied with electricity is neutralized by alkaline ions, and thus electric field is not formed smoothly, and a part of the filtrate is vaporized after coulomb heat is generated. When discharged to the outside it was condensed to increase the water of the sludge has had a number of problems such as lowering the dehydration rate.

The present inventors have been researched and developed to improve the problems of the conventional electric dehydration device, to prevent the sludge from being dense on the filter cloth during dewatering, and to supply electricity intermittently to reduce the neutralization around the positive electrode plate to reduce the electric field The present invention provides an electroosmotic filter press dewatering apparatus which can reduce the moisture content of the sludge discharged to make the smoothly made and also to suck out the water vapor generated by the coulomb heat from time to time. It is completed.

1 is a schematic view of the electroosmotic filter press dewatering apparatus of the present invention

Figure 2 is a cross-sectional view showing the main portion of an embodiment of the present invention

Figure 3 is a cross-sectional view for showing the movement of the sludge particles in the present invention

☞ Explanation of symbols used in the main part of the drawing ☜

1: electric dehydration device 2: fixed plate

3: cylinder 4: pressure plate

5: filter plate 5a: sludge supply hole

6: filter cloth 7: slurry tank

8,18: tube 9: pump

10: sludge 11: power supply

12: (-) pole plate 13: filtrate outlet

14: pole plate fixing plate 15: (+) pole plate

16: intermittent valve 17: vacuum pump

Figure 1 shows a schematic diagram of the electroosmotic filter press dewatering device of the present invention, Figure 2 shows an excerpt cross-sectional view showing an embodiment of the present invention, Figure 3 shows the movement of the sludge particles in the present invention For illustrating the cross-sectional view, the configuration of the present invention will be described below.

According to the present invention, a plurality of filter plates 5 are positioned between upper plates of the pressing plate 4 which slides by the cylinder 3 toward the fixed plate 2, and the filter cloth 6 is positioned between the upper plates of each filter plate 5, thereby allowing slurry tanks to be positioned. (Slurry tank) 7 and the tube (8) connected to the pump (9) to enable the discharge of the filtrate from the sludge 10 is injected through the sludge supply hole (5a), the filter outside the filter cloth (6) On the plate 5, a pole plate receiving DC power from the power supply unit 11 is installed and included in the sludge 10, and the filtrate discharge port 13 penetrated through the filter plate 5 by dewatering the combined water and the like by a magnetic field. In constructing the electric dehydration device (1) to discharge the furnace,

In the present invention, the pole plate fixing plate 14, on which the positive electrode plate 15 is placed, is positioned in the center of the filter cloth 6 located between the respective filter plates 5, and the filter plate outside the filter cloth 6 ( 5) The negative electrode plate 12 is installed on the top to allow the sludge 10 particles having negative properties to move toward the positive electrode plate 15 when the power is applied to form a magnetic field. It can be made easily, the power supply 11 is interrupted in 1/1000 ~ 1/30 seconds to supply power to block the neutralization of the (+) pole plate 15 to form a smooth electric field, The filtrate discharge port 13 side is connected to the vacuum pump 17 and the tube 18 blocked by the intermittent valve 16 to discharge the steam generated by the coulomb heat.

In the present invention, the positive electrode plate 15 uses stainless steel (SUS) to minimize damage caused by electrical corrosion, and the surface is coated with a corrosion resistant material, that is, platinum, titanium, nickel, graphite, and the like. .

In the figure, reference numeral 19 denotes a drip tray and reference numeral 20 denotes an air compressor for supplying compressed air for supplying sludge 10.

The present invention can be configured as described above can be used as a device for separating the water contained in the sludge 10 generated in the waste water treatment apparatus for treating waste water, as shown in Figure 1 slurry tank When the pump 9 connected to the slurry tank 7 and the pipe body 8 is operated, the filter cloth positioned between the filter plates 5 along the sludge supply holes 5a formed in each filter plate 5 6) filling the sludge 10 at a pressure of about 4 ~ 6kgf / ㎠, the filled sludge 10 is primarily contained in the sludge 10 by the operation of the cylinder 3 of the pressing means After dehydration, power is applied to the (+) pole plate 15 and the (-) pole plate 12 to form an electric field in the sludge 10 layer to dehydrate the combined water contained in the sludge 10 secondly. will be.

That is, according to the present invention, since the positive electrode plate 15 is installed at the inner center of the filter cloth 6 and the negative electrode plate 12 is located at the outside of the filter cloth 6, power is applied to the sludge 10 layer. When the electric field is formed, dehydration is induced by using electric force generated by the action of electrophoresis and electro-osmosis in the sludge 10 layer. 15), the solid particles of the (-) charge sludge 10 is moved, the water carrying the (+) charge toward the (-) electrode plate 12 is moved to be dehydrated. According to this, the sludge 10 particles are driven to the (+) electrode plate 15 side, that is, the center, so that the overcrowding of the filter cloth 6 can be eliminated, thereby maximizing the efficiency of dehydration.

And in the present invention, as the power supply unit 11 for supplying power to the (+) pole plate 15 and the (-) pole plate 12 is interrupted at intervals of 1/1000 ~ 1/30 seconds as the power is supplied ( The neutralization caused by alkaline ions generated by continuously supplying power to the pole plate 15 is reduced to form a smooth electric field, and the positive electrode plate 15 has a corrosion resistant material, Platinum, titanium, nickel, graphite, and the like is composed of a coating to prevent the anode plate from being damaged by electrical corrosion.

And the present invention is connected to the vacuum pump 17 and the tubular body 18 is blocked by the intermittent valve 16 to the filtrate discharge port 13 side to discharge the steam generated by the coulomb heat from time to time to discharge the sludge cake discharged after dehydration By not increasing the water content is to improve the dehydration efficiency further.

As described above, in the present invention, the positive electrode plate 15 is installed inside the filter cloth 6, and the negative electrode plate 12 is installed outside, so that the sludge 10 during dehydration is overcrowded on the filter cloth 6. To prevent electricity from being discharged intermittently and to reduce neutralization around the positive electrode plate 15 so that the electric field can be made smoothly, and the vapor generated by the coulomb heat is often sucked out by the vacuum pump 17. In order to reduce the moisture content of the sludge 10 is finally discharged, it is a very excellent invention that can achieve more than expected, such as not only efficient treatment of the sludge 10, but also need not be dried separately during recycling.

Claims (1)

A plurality of filter plates 5 are positioned between the upper plates of the pressing plate 4 which slides by the cylinder 3 to the fixed plate 2 side, and a filter cloth 6 is positioned between each filter plate 5 to form a slurry tank. (7) and the pipe (8) connected to the pump (9) to enable the discharge of the filtrate from the sludge 10 is injected through the sludge supply hole (5a), the filter plate (5) outside the filter cloth (6) In the above), a pole plate receiving DC power from the power supply unit 11 is installed and included in the sludge 10 to constitute an electric dehydration device 1 which dehydrates the combined water by a magnetic field and discharges it to the filtrate outlet 13. In that, In the center of the filter cloth 6 located between each of the filter plates 5, a pole plate fixing plate 14 on which a positive electrode plate 15 is installed is placed, and the filter plate 5 outside the filter cloth 6 is positioned. On the top, install the negative electrode plate 12, The power supply unit 11 is to be supplied power while intermittent in 1/1000 ~ 1/30 seconds, The filtrate discharge port 13 side is connected to the vacuum pump 17 and the tubular body 18 blocked by the control valve 16, the electroosmotic filter press dewatering device, characterized in that to suck the water vapor generated by the Coulomb heat from time to time