KR20130011517A - Electroosmotic dehydrator - Google Patents

Abstract

Electro-osmotic dewatering device having a drying function according to the present invention is a frame, rotatably installed on the frame to penetrate electricity to the sludge to dehydrate the electrode drum for relaying or inducing current, the electrode is installed on the frame Guided by a caterpillar on the orbit with one side pressed against the outer circumferential surface of the drum, and guide rollers are installed in the frame at a predetermined interval, the caterpillar insulated for transporting the sludge through the electrode drum and the caterpillar It is provided with a belt, and a drying unit including a blower for supplying and blowing air to the sludge dewatered by the caterpillar and the polarizing drum.

Description

Electroosmotic dehydrator with drying function

The present invention relates to an electroosmotic dehydration apparatus, and more particularly, to an electroosmotic dehydration apparatus having a drying function capable of drying sludge using outside air and washing the filter cloth.

In general, sludge (sludge) generated in wastewater and sewage treatment plants uses a polymer flocculant to purify water. Sludge agglomerated by the polymer flocculant is not easily dehydrated. The sludge has a big difference in the sludge disposal cost and recycling range according to the dehydration rate, and if the water content of the sludge can be significantly reduced, not only the waste cost is reduced but also the sludge solids are fueled. It will be very economically added value, such as being able to recycle.

However, the conventional simple pressurized dewatering device has a limitation in the dewatering of the wastewater sludge, so in recent years, an electropenetrating dewatering device having good dewatering efficiency for dewatering the sludge has been utilized.

The electro-osmotic dewatering device is to remove the water combined with the sludge by ion mobility, a rotating drum serving as an anode electrode, and a water-permeable compression belt formed to surround the outer circumferential surface of the rotating drum. And, it consists of a filter belt formed to overlap the surface of the dehydration region of the rotating drum and the pressing belt.

Japanese Patent Application Laid-Open No. 56-60604 and Domestic Patent Application No. 1993-0010856 disclose an electric permeation sludge dewatering device.

The electro-impregnated sludge dewatering device is applied with a constant voltage between the drum and the pressing belt to form an electric field, so that the charged water in the electric field moves to the side of the electrode opposite to the charge of the sludge particles by electrophoresis and capillary action. As the water is separated, dewatering from the sludge occurs.

Meanwhile, in Korean Patent Application No. 2003-39471, three-phase alternating current is rectified for each phase (R, S, T) so as not to cause a silver voltage drop, and converted into a DC voltage pulse, and then a sequential voltage due to a phase difference is applied to the electrode. There is disclosed an electropenetrating dewatering dehydration device which prevents a loss of voltage during the dehydration process and maintains a constant voltage at all times to increase the dehydration performance.

The present invention is to solve the problems as described above, and after the dehydration of the quantitatively supplied sludge can be supplied to the outside air during the movement to improve the drying efficiency, the insulation belt interposed between the drum and the caterpillar, that is, An object of the present invention is to provide an electroosmotic dewatering device capable of improving the dewatering efficiency by washing the filter cloth.

Electro-penetrating dewatering device of the present invention for achieving the above object is rotatably installed on the frame, the electrode drum to induce dehydration by penetrating electricity into the sludge and is installed on the frame, Caterpillar on the endless track that one side is pressurized contact with the outer peripheral surface of the electrode drum,

It is guided by guide rollers installed at predetermined intervals in the frame, and provided with an orbital insulating belt for transporting sludge between the electrode drum and the caterpillar,

Characterized in that it comprises a drying unit including a blower for supplying and blowing air to the sludge dewatered by the caterpillar and the electrode drum.

In the present invention, the drying unit is provided with a blower for supplying the outside air to the sludge is transported by the insulating belt falls. The drying unit includes transfer conveyors alternately stacked to transfer sludge discharged from the insulation belt to multiple stages, and blower fans installed between the conveyors.

The washing unit is to wash the insulating belt for transporting the sludge for dewatering, the hopper is installed in the lower portion of the insulating belt, the air spray nozzle, water spray nozzle is installed on the upper side corresponding to the hopper or hopper And a nozzle that mixes water and air to spray w. The hopper may be provided with an air nozzle for separating the foreign matter attached to the insulating belt. The air or water spray nozzle may be transported by a separate transport means.

In addition, the sludge fixed quantity supply unit is installed on the frame of the upper side to supply a fixed amount of sludge to the insulation belt side, the sub-frame is installed on the frame, the first supply conveyor is installed inclined to the sub-frame, the sub-frame The second supply conveyor is installed to be rotatable in the first supply conveyor and the lower end is in close proximity, the second supply conveyor is installed to expand the top.

The electropenetrating dewatering device having a drying function according to the present invention can improve the dewatering efficiency of the sludge by uniformly supplying the sludge for dewatering by a predetermined amount, and continuously washing the insulating belt. In particular, it is possible to maximize the evaporation drying effect by blowing the inside or outside air to the dewatered sludge.

1 is a cross-sectional view showing an electric permeation dewatering device according to the present invention.
Figure 2 is a perspective view showing a drum and a caterpillar of the electro-osmotic dewatering device according to the present invention.
Figure 3 is a perspective view showing an extract of the drum and the caterpillar according to the present invention,
4 and 5 are a perspective view showing another embodiment of the drum and the caterpillar according to the present invention.

1 to 5 show an embodiment of an electric penetration dehydration apparatus having a drying function according to the present invention.

 Referring to the drawings, the electric permeation dewatering device 10 having a drying function is rotatably installed on the frame 11 and the frame 11 to penetrate and dehydrate electricity to induce electric relay. 20 and an endless caterpillar 30, one side of which is attached to the frame 11 and one side is in pressure contact with the outer circumferential surface of the electrode drum. Then, guided by guide rollers 41 installed in the frame 11 at predetermined intervals, the endless track for transporting the sludge 200 via the electrode drum 20 and the caterpillar 30 The insulating belt 50 of the upper part is provided. And a drying unit 60 including a blower for supplying and blowing air to the sludge dewatered by the caterpillar 30 and the electrode drum 20, and installed on the frame 11 to provide the insulation belt 50. It is provided with a washing unit 70 for washing, and the sludge metering supply unit 80 is installed on the upper side of the frame 11 for supplying a fixed amount of sludge for dewatering.

Referring to the components of the electric permeation dehydration device having a drying function according to the present invention configured as described above in more detail as follows.

In the electroosmotic dehydration apparatus, the electrode drum 20 and the caterpillar 30 installed on the frame 11 form a main dehydration means. The electrode drum 20 is supported by sprockets (31, 32, which may be composed of electrode rollers) and a plurality of sprockets (33-35, which may be composed of support rollers) for relaying or inducing a three-phase AC current. It is in contact with the caterpillar 30 on the caterpillar. The caterpillar 30 has a structure in which the split electrode bars 37 are supported by the pair of chains 36 by a pair of chains formed in an orbit. And it is further provided with a power applying means (not shown) for supplying power to the electrode roller 20 and the caterpillar 30. A positive electrode and a negative electrode may be applied to each electrode of the electrode drum 20 and the caterpillar 30 by the power applying means.

  The split electrode bar 37 preferably uses an iron alloy containing 14% by weight of Si and 0.1% by weight of Mg. In the case of using the ferroalloy containing 14 wt% of Si and 0.1 wt% of Mg, the applied electrode density was 2.16 A / m 2. This indicates that the applied current density is relatively high when stainless is used as the split electrode material.

In addition, the split electrode bar 37 may increase the content of copper, aluminum, copper, or an aluminum alloy on an inner surface thereof, that is, an inner surface side corresponding to the outer circumferential surface of the roller. It is preferable to form a coating layer made of a nonmagnetic material such as aluminum or to provide a nonmagnetic pad. Cooling means for cooling the electrode drum 20 may be further provided on the inner circumferential surface of the electrode drum 20.

 The power applying means is for supplying power to the electrode drum 20 and the caterpillar 30, to apply a positive voltage to the split electrode 61a of the electrode roller 61, to the caterpillar 30 It may be provided with a DC power supply for applying a voltage of the negative electrode or an AC voltage applying for applying a three-phase AC voltage or high frequency to the electrode and the caterpillar of the electrode roller. A brush in contact with the unit electrode or the caterpillar may be provided.

The insulating belt 50 is guided by the guide rollers 41 and is caught by the electrode drum 20 to insulate the caterpillar 30 from the electrode drum 20. The insulating belt 50 may be formed of a filter cloth, but is not limited thereto, and may transport sludge between the electrode drum 20 and the caterpillar 30 for dewatering the sludge supplied from the sludge metering supply unit 80. As it is, it may be made of a porous belt and the like made of an insulating material.

The drying unit 60 is for drying by blowing air or bet to the sludge 200 dehydrated by the electrode drum 20 and the caterpillar 30, the guide roller as shown in Figs. Outlet side conveyed by the insulating belt 50 supported by the (41), that is, installed on the lower side of the sludge 200 transported by the insulating belt is dropped to blow air for drying to the sludge falling Blowing fan 61 for. The blowing fan 61 may be formed of a sirocco fan, but is not limited thereto, and may be any structure as long as it can blow air into the discharged sludge 200. That is, the blowing fan may be made of an axial fan.

In addition, the drying unit 60 has unit conveyors 65 installed to be spaced apart at predetermined intervals in the vertical direction so as to transfer the discharged sludge in multiple stages, and the sludge conveyed by the unit conveyors 65 is disposed below. Unit blower fan 66 for supplying the bet or the outside air to the sludge falling when moving to the unit conveyor is located. The blowing fan is driven by separate first driving parts 62, respectively.

On the other hand, the insulating belt cleaning unit 70, as shown in Figure 4 to drive the brushes 71, 72 installed on the upper and lower portions of the insulating belt 50, each of the brushes 71, 72 The second driving unit 73 is provided.

As shown in FIG. 5, the cleaning unit 70 has a cleaning hopper 75 installed to be close to the lower surface of the insulating belt 50, and an upper side of the insulating belt 50 corresponding to the cleaning hopper 75. Is installed in the injection nozzles 76 for injecting air or water for cleaning is installed. The injection nozzle 76 may be installed on the inner circumferential surface of the cleaning hopper 75, the cleaning hopper 75 may be provided with a suction pump (not shown) that provides a suction force from the lower surface of the insulating belt 50. . And a cover member 77 is installed on the injection nozzle side to prevent the foreign matter separated from the washing water or the insulating belt from the injection nozzle 76 is dispersed.

The sludge fixed quantity supply unit 80 is for supplying a fixed amount of sludge for dehydration, and is supported by a subframe 12 supported by the frame 11 as shown in FIG. And a hopper 81 having a width substantially the same as the width. One side of the hopper 81 is provided with the inclined first supply belt conveyor 82, the other side of the first supply belt conveyor 82 and the lower end is adjacent and the upper end side is spaced apart from the first supply belt conveyor A second supply belt conveyor 83 is provided to be tapered with the first supply belt conveyor 82.

The first and second feed belt conveyors 82 and 83 respectively include upper rollers 82a and 83a, lower rollers 82b and 83b positioned below the upper rollers 82a and 83a, and upper rollers 82a and 83a. The supply rollers 82c and 83c are provided in the lower rollers 82b and 83b. The supply belt may be made of a flat belt, a mesh belt, and the like, and a take-up device for adjusting the tension of the belt may be installed in the subframe. The subframe further includes a third driving unit 85 for driving the first supply belt conveyor and the second supply belt conveyor.

The first and second supply belt conveyors 82 and 83 are further provided. The first and second supply belt conveyors 82 and 83 rotate in opposite directions to smoothly discharge the sludge 200.

As described above, the operation of the electro-osmotic dehydration apparatus having a different drying function in the present invention is as follows.

First, the sludge 200 is supplied to the hopper 81 of the sludge metering supply unit 80 while a predetermined current is supplied to the electrode drum 20 and the caterpillar 30. In this state, the first and second supply belt conveyors 82 and 83 are driven. In this way, while the conveyor rotates, the sludge 200 moves to the lower portion of the first and second supply belt conveyors 82 and 83 and is discharged. At this time, the first and second supply belt conveyors 82 and 83 are continuously rotated at a constant speed, so that the sludge is continuously supplied quantitatively. The sludge supply amount may be adjusted by varying the rotation speed of the first and second supply belt conveyors 82 and 83.

The sludge supplied as described above is dehydrated while being transported between the electrode drum 20 and the caterpillar 30.

In this process, the caterpillar 30 has the split electrode bars 37 connected to the chain 76, and a plurality of through holes are formed in the split electrode bars 37. It is dehydrated by infiltration dehydration.

The sludge 200 dehydrated as described above is discharged after being moved through an insulating belt. Since the drying unit 60 is installed on the discharge side, as shown in FIG. 3, the sludge 200 is dehydrated. The vapor can be discharged and dried. In the process of electro-osmotic dehydration, the temperature of the sludge is increased so that a part of the moisture is evaporated to exist between the particles, and the temperature of the sludge is increased to continuously evaporate water from the surface of the sludge particles. The drying unit 60 may activate the evaporation of water vapor from the particles of saturated steam or sludge present in the sludge 200 discharged from the insulating belt 50 by the blower fan 61 and the sludge of the sludge. Dehydration, that is, to increase the drying efficiency. In particular, it is possible to increase the dewatering efficiency of the sludge because it is possible to activate the evaporation of water as passing through the unit conveyor 65 installed in the multi-stage discharged sludge.

In the process of dehydration of the sludge as described above, the insulating belt 50 is contaminated by the sludge 200, the contaminated insulating belt 50 is a continuous or intermittent cleaning by the cleaning unit 70 Therefore, it is possible to prevent the dewatering of sludge by the insulation belt. That is, as shown in FIG. 5, a hopper 75 is installed on the lower side of the insulating belt 75, and a nozzle for spraying air or water for washing is installed on the upper side of the insulating belt 50 corresponding thereto. Therefore, by spraying air or water from this nozzle, sludge that contaminates it from the insulating belt 50 can be removed.

As described above, the electro-infiltration dewatering device having a drying function according to the present invention can supply a fixed amount of sludge for dewatering, and discharge saturated saturated steam in the sludge made of electro-infiltration dehydration and evaporation of water from the sludge. Since it can be activated, the dehydration efficiency can be increased. In addition, since the insulating belt can be continuously or intermittently cleaned, it is possible to prevent the dehydration of the sludge passing through the electric penetrating dehydration, that is, between the electric drum and the caterpillar, by being prevented by the insulating member.

While the present invention has been particularly shown and described with reference to exemplary embodiments thereof, it will be understood by those skilled in the art that various changes and modifications may be made without departing from the scope of the invention.

Accordingly, the true scope of protection of the present invention should be determined only by the appended claims.

Claims (5)

Caterpillar in a caterpillar on the frame, rotatably installed in the frame to penetrate electricity into the sludge to dehydrate the electrode drum for relaying or inducing current, and one side of the electrode drum is pressed in contact with the outer peripheral surface of the electrode drum Wow,
It is guided by guide rollers installed at predetermined intervals in the frame, and provided with an orbital insulating belt for transporting sludge between the electrode drum and the caterpillar,
And a drying unit including a blower for supplying and blowing air to the sludge dewatered by the caterpillar and the insulating drum. The electric permeation dewatering device having a drying function according to claim 1, wherein the drying unit includes a blower for supplying outside air to sludge that is transferred by the belt and dropped by the insulating belt. The method of claim 1,
The drying unit includes transfer conveyors alternately stacked to transfer the sludge discharged from the insulating belt to multiple stages, and blower fans installed between the conveyors. Device. The method of claim 1,
The washing unit is for washing the insulating belt for transporting the sludge for dewatering, the hopper is installed in the lower portion of the insulating belt, the air nozzle, water spray nozzle, installed on the upper side corresponding to the hopper or hopper, An electroosmotic dewatering device having a drying function, characterized in that it comprises one selected from nozzles for mixing water and air to spray. The method of claim 1,
The sludge fixed quantity supply unit is installed on the frame of the upper side to supply a fixed amount of sludge to the insulation belt side, the sub-frame is installed on the frame, the first supply conveyor is inclined to the sub-frame, and the sub-frame An electric chimney dewatering device having a drying function, wherein the second supply conveyor is installed to be rotatable and the first supply conveyor and the lower end are proximate to each other, and the second supply conveyor is installed to expand the upper part.

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