KR101444672B1 - Resources equipment for sludge containing metals - Google Patents

Abstract

The present invention relates to equipment for recycling sludge containing metal. In particular, ultrasonic waves are transmitted to the sludge containing metal to detach metal ions from the sludge and to dissolve the metal ions by a cavitation phenomenon. The detached and dissolved metal ions are collected and removed by an electrolysis reaction. Organic materials and metal of waste metal liquid having a low concentration and not collected, are oxidized by an ozone oxidation method to be precipitated into metal oxide and then to be separated. The equipment: can prevent water pollution; separates metal substances through multiple stages; and detoxifies sludge in various kinds including industrial sludge to enable the detoxified sludge to be used as resources such as fuel.

Description

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a metal-containing sludge,

More particularly, the present invention relates to a sludge recycling apparatus for a metal-containing sludge, and more particularly, to a sludge containing metal containing sludge by ultrasonic irradiation to desorb metal ions from the sludge by a sintering phenomenon, And the low concentration metal wastewater which has not been collected is oxidized by the ozone oxidation method and the metal and the metal are oxidized and precipitated as a metal oxide to separate the metal components from each other while preventing the water pollution, The present invention relates to a resource-use facility that can be used as a resource.

The sludge formed by mixing various materials such as domestic sewage, industrial waste, bottom dredged soil, and contaminated soil is reduced in volume by dehydration, solidified through a drying process, and then treated as a fuel or incinerated or buried have. In particular, due to the revision of the Waste Management Act, organic sludge with a water content exceeding 75% is prohibited from land reclamation entirely, and marine dumping is totally prohibited so that the maximum amount of water is separated and the solid matter is treated.

Especially, scrap of electronic parts including printed circuit boards used for various electronic products, recycling of valuable metals from waste catalysts which are frequently found in chemical plants, The wastewater generated during photographic development contains a large amount of heavy metals. Therefore, the recycling of such wastewater and the efficient recovery of valuable metals having the recovered value from the wastewater are very important in terms of creating value of waste resources and preventing environmental pollution It is one of the issues being addressed.

However, in the case of metal waste water having a low content of valuable metals generated in the electronics industry and the plating industry, it is discharged as it is without any treatment. Recently, as environmental standards have been strengthened, wastewater treatment processes have been carried out without directly discharging metal wastewater. That is, sludge containing high concentration heavy metals is formed by chemical treatment of chemical coagulation and sedimentation by mixing a large amount of chemicals with metal wastewater.

Such sludge containing heavy metals is treated by incineration or landfill. However, since sludge also contains heavy metals, it releases heavy metals in the atmosphere during incineration and causes secondary pollution by leaching of heavy metals during landfilling. Therefore, a method of removing or detoxifying heavy metals should be preceded.

An electrolysis method has been proposed as a method for recovering heavy metals from metal wastewater which is a method of removing heavy metals.

Korean Patent Registration No. 10-1029472 (hereinafter referred to as "registered patent") is a device for recovering copper by passing metal wastewater through a cell and attaching it to an extraction pipe inside a cell. The above patent discloses that heavy metals can be separated from sludge containing heavy metals, but in the case of sludge, the extraction rate of heavy metals is low because of the low desorption rate of metal ions, and even if the mechanical stirring time for crushing sludge is increased to increase the extraction rate, The contrast extraction efficiency is low, and the metal ions in the sludge are not sufficiently discharged.

In Korean Patent Application Laid-Open No. 10-2009-0127550 (hereinafter referred to as "patent"), in the method of immobilizing heavy metals using phosphate and ultrasound, phosphate is immobilized by binding with heavy metals in the sludge, A method of irradiating ultrasound to improve the contact of heavy metals has been proposed.

However, in the above-mentioned patent, the reaction is carried out by mixing phosphate up to 20 times the required equivalent in order to react and immobilize all the heavy metals. The discharged water after the reaction contains excess phosphate. The effluent containing excess phosphate is either directly discharged or separately collected, neutralized and then discharged, resulting in a longer treatment period. In addition, if the discharge is carried out without neutralization of the phosphate, generation of green algae is accelerated due to supersaturation of the phosphorus in the river, thereby increasing water pollution.

Therefore, it is easy to separate and discharge the heavy metal contained in the ion state from the sludge while preventing the water pollution, and there is a need for new ways of resource reclamation or harmlessness of waste resources and measures.

Therefore, the resource-setting equipment of the metal-containing sludge of the present invention,

After the pH of the introduced sludge is adjusted, the metal ions contained in the sludge are desorbed and dissolved from the sludge particles by the cavitation phenomenon by irradiating ultrasonic waves, and the dissolved metal ions are filtered using a vertical filtration wall having a filtration membrane or filter cloth The present invention aims to provide a facility for recovering only metal ions in a solution by an electrolysis reaction after separating the sludge solids from the sludge solids, dehydrating only the remaining sludge solids, and drying and reusing the sludge solids.

The present invention also relates to a method for recovering a primary metal component by supplying ozone to effluent water recovered from a primary metal component to oxidize organic substances and oxidizing remaining minute metal components to precipitate oxides to improve water quality of the final effluent, And to provide facilities for

In order to solve the above-mentioned problems, the resource-

A system for removing or recovering a metal component from a sludge containing metal to improve the quality of the sludge and a sludge remaining after the sludge is post-treated or recycled, characterized in that the vertical space is provided with a filtration membrane or filter cloth, And an ultrasonic generator is installed in the first chamber to dissipate metal ions from the sludge by irradiating ultrasonic waves to the sludge containing the introduced metal components, and an anode member is installed in the first chamber or the second chamber, An ultrasonic-electrolytic hybrid reaction tank in which metal components desorbed from the sludge are attached to the cathode member of the second chamber through the filtration membrane or filter cloth of the vertical filtration wall by disposing a cathode member in the second chamber, thereby separating metal components from the sludge; .

The ultrasonic-electrolytic hybrid reaction tank is divided into an outer first chamber and an inner second chamber by a cylindrical vertical filtration wall having a filter cloth or filtration membrane, and an anode member in the form of a cylindrical net is installed in the first chamber or the second chamber And the metal ions desorbed from the sludge are adhered to the cathode member of the second chamber through the filtration membrane or filter cloth of the vertical filtration wall so that the separation of the metal components from the sludge can be performed have.

An inlet tank for storing wastewater containing metal sludge supplied to a first chamber of the ultrasonic-electrolytic hybrid reaction tank; A treatment water tank for trapping wastewater discharged from a second chamber of the ultrasonic-electrolytic hybrid reaction tank and adsorbing or ion-exchanging the residual metal and finally discharging the residual metal; A dehydrator for collecting and discharging the wastewater discharged from the first chamber of the ultrasonic-electrolytic hybrid reaction tank and discharging the dehydrated water to the inflow or treatment water tank through a dehydration pipe; And a dryer for drying the sludge solid component discharged from the dehydrator to convert the sludge solid component into fuel.

Further, an oxidation reaction tank in which an ozone generator is installed is further provided between the ultrasonic-electrolytic hybrid reaction tank and the treated water tank to oxidize organic matters and trace metal ions contained in the wastewater discharged from the second chamber, So that only the wastewater from which the metal salt has been removed can be discharged to the treated water tank.

The resource-setting equipment of the metal-containing sludge of the present invention by the above-

The metal contained in the sludge can be removed by ultrasonic irradiation, electrolysis and ozone supply method to make the sludge harmless and solidify it to be used as fuel or to prevent secondary environmental pollution caused by heavy metal during landfilling.

In addition, by minimizing the input of water treatment agent and applying a physical or electrochemical method, it is possible to effectively separate metal components while increasing the recovery rate of metal components while preventing increase of sludge by adding chemicals and pollution of discharged water .

Also, by removing metal components through ultrasonic wave, filtration, electrolysis and ozone oxidation, it is possible to purify the mixed materials of metals such as the purification of soil contaminated with metal components and the purification of metal contaminated water in addition to the sludge containing metal It is possible to provide useful facilities that can increase the industrial ripple effect such as being applicable to various fields.

1 is a schematic view showing the constitution of a recycling facility of a metal-containing sludge according to the present invention.
FIG. 2 is a schematic view showing the configuration of a resource-reclamation facility for medium-speed sludge containing an oxidation reaction tank. FIG.
3 is a schematic diagram showing a configuration of a recycling facility provided with another type of ozone generator according to the present invention.
4 is a schematic diagram showing a cylindrical ultrasonic-electrolytic hybrid reaction tank according to another embodiment of the present invention.

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS The present invention will be described in detail with reference to the accompanying drawings. It should be understood, however, that the appended drawings illustrate only the contents and scope of technology of the present invention, and the technical scope of the present invention is not limited thereto. It will be apparent to those skilled in the art that various changes and modifications can be made within the scope of the technical idea of the present invention based on these examples.

1 is a schematic view showing a constitution of a recycling facility for a metal-containing sludge according to the present invention.

As described above, the recycling facility 10 according to the present invention recovers metal components from the sludge containing a metal component to improve the quality of the sludge, and fuels the remaining sludge.

The recycling facility 10 has an inlet tank 20 for storing wastewater containing sludge containing a metal component including heavy metals. The inlet tank 20 temporarily stores the sludge containing the metal components and adjusts the pH thereof so that it can be supplied in a quantitative manner to the next process. The influent wastewater can be supplied to a variety of materials such as domestic sewage, industrial waste, Mixed wastewater or sludge, wastewater that is primarily recovered from metal wastewater, or sludge generated in a metal recovery process, and the like. A pH adjusting device and a stirrer may be installed in the inflow bath 20 so that the size of the lumps of the sludge can be reduced while preventing the impregnated sludge from being deposited.

Next, an ultrasonic-electrolytic hybrid reaction tank 30 is provided to supply the wastewater or sludge stored in the inflow tank 20 to separate metal ions by a complex reaction.

The ultrasonic-electrolytic hybrid reaction tank 30 is provided with a vertical filtration wall 33 having a filtration membrane or a filtering cloth in its inner space so that a space is formed between the first chamber 31 and the second chamber 32 on both sides of the vertical filtration wall. It divides.

The filtration membrane or filter cloth provided on the vertical filtration wall 33 has a pore size of 15 탆 or less to prevent the solid sludge from passing therethrough and preferably has a range of 1 탆 to 30 탆, And the waste water is discharged to the second chamber.

For example, in the first chamber 31, waste water stored in the inflow tank 20 is pumped with a pump, and wastewater containing sludge is collected in the first chamber 31, and sludge and foreign matter are removed Passes through the vertical filtration wall 33 and is collected in the second chamber 32. That is, in the first chamber 31, wastewater containing solids is stored, and in the second chamber 32, wastewater from which solids are removed by filtration is stored.

The vertical filtration wall 33 separating the first chamber and the second chamber may be provided in a form in which a filtration membrane or a filter cloth is embedded in a support formed of a plurality of through holes or a net, A filtration membrane or a filter cloth may be installed only on the part to perform the space division and filtration. That is, a vertical filtration wall is formed by forming a coupling groove in an ultrasonic-electrolytic hybrid reaction tank and a supporting body having a filtering cloth or a filtration membrane in the coupling groove, thereby forming a partition between the first chamber 31 and the second chamber 32 And the wastewater can be prevented from flowing between the coupling grooves of the two members through the watertight packing between the coupling groove and the vertical filtration wall. By such a constitution, the sludge as a solid substance is concentrated in the first chamber, and the concentrated solid wastewater is discharged continuously or intermittently so that dehydration can be performed.

In addition, the first chamber 31 is provided with an ultrasonic generator 34. The ultrasonic generator irradiates ultrasound waves in a frequency band of 10 to 80 kHz. A plurality of ultrasonic waves are radiated on the bottom of the first chamber or a plurality of sludges are installed on the bottom and side walls of the first chamber, The sludge structure is broken by the micro-bubbles temporarily generated on the surface of the sludge by cavitation caused by the ultrasonic vibration, and the metal ions contained in the sludge Is discharged and is converted into a form that melts into wastewater. In particular, when the round type ultrasonic irradiation is performed, the wavelength is changed due to the interference between the generated frequencies, so that more fine bubbles are generated and the metal ions are easily discharged due to breakage of the sludge structure. In addition, the filtration membrane or solids immersed in the filter cloth can be desorbed by ultrasonic irradiation to prevent clogging of the filtration membrane or filter cloth. When the ultrasonic wave is irradiated in a frequency band of 10 kHz or less, air bubbles are weakly generated, and when irradiated in a frequency band of 80 kHz or more, it is difficult to penetrate into the sludge and the amount of reflection increases. It is preferable to irradiate the metal ion in the above range because there is a disadvantage that internal metal ion separation is not performed well.

An anode member 35 and an anode member 36 are respectively installed in the first chamber 31 and the second chamber 32 of the ultrasonic-electrolytic hybrid reaction tank 30. The anode member 35 and the cathode member 36 may be formed in the shape of a rod, a plate, or a tube, or may be formed into a plurality of bars. Particularly, the cathode member 36 is a portion where metal ions are deposited, and can increase the surface area with various structures for increasing the contact area with the wastewater. In the chamber, any one of the first chamber and the second chamber, The agitator is installed in both the first chamber and the second chamber so that the metal ions discharged from the sludge are uniformly distributed in the chambers while the contact between the metal ions and the cathode member 36 is improved, So that it can be easily performed.

Also, the anode member may be installed in the first chamber, the cathode member may be installed in the second chamber to perform the electrolysis reaction, or both the anode member and the cathode member may be installed in the second chamber to perform the electrolysis reaction.

A plurality of ultrasonic generators 34 are installed in the first chamber 31 and an anode member 35 and an anode member 36 are installed in the first chamber 31 and the second chamber 32, The wastewater containing the sludge, which is the solid material flowing into the first chamber 31, is contained in the first chamber and the wastewater filtered by the vertical filtration wall 33 is filtered by the second chamber 32 Collected.

At this time, when the ultrasonic generator 34 is operated, the ultrasonic waves generated by the ultrasonic wave generator are transmitted to the sludge, which is solid matter, and microbubbles generated by the cavitation phenomenon are temporarily generated and removed on the surface of the sludge. The sludge surface is broken by this pressure, the metal component is removed from the sludge and discharged, and the discharged metal component is converted into the metal ion state. In this state, when power is supplied to the anode member 35 and the cathode member 36, the metal ions pass through the vertical filtration wall 33 and are electrodeposited to the cathode member, thereby separating the metal ions contained in the waste water and the sludge. The wastewater from the second chamber 32 is discharged to the treatment tank 50 while the metal ions are separated from the wastewater and the wastewater containing the solids in the first chamber 31 is discharged to the dehydrator 60. In this process, acid or alkali is added to the first chamber and the second chamber to adjust the pH, thereby increasing the dissolution of the metal from the sludge and increasing the electrical extraction efficiency of the dissolved metal.

In order to remove the metal deposited on the cathode member 36 of the second chamber 32, the cathode member on which the metal component is deposited may be replaced or a plurality of ultrasonic generators 37 may be provided in the second chamber, So that the metal deposited on the cathode member can be removed or peeled off by ultrasonic cavitation. For example, ultrasonic waves may be applied to a negative electrode member on which a metal component is electrodeposited so that the metal is separated or peeled and separated from the negative electrode member and recovered. At this time, the metal component is separated from the cathode member, and the highly concentrated wastewater can be recovered from the metal component by removing moisture through a solid-liquid separator or a dehydrator.

In addition, a series of ultrasonic-electrolytic hybrid reactors may be constructed by connecting the first chamber and the second chamber in series or parallel.

Also, referring to FIG. 4, the ultrasonic-electrolytic hybrid reaction tank may be provided in a cylindrical shape. The cylindrical reaction tank 30 is divided into an outer first chamber 31 and an inner second chamber 32 by a cylindrical vertical filtration wall 33. The first chamber or the second chamber is provided with a cylindrical The anode member 35 is installed in the second chamber and the rod-shaped cathode member is provided so as to have the same axis. The metal ions desorbed from the sludge are adhered to the cathode member of the second chamber through the vertical filtration wall 33, So that the separation of the metal component can be performed. Here, the anode member and the anode member may be disposed in a manner that the anode member 35 is provided in the first chamber 31 and the cathode member 36 is provided in the second chamber 32, The anode chamber is provided in the first chamber, the cathode chamber is provided in the second chamber in the large diameter, and the anode chamber is formed in the cathode chamber in the form of a cylindrical or rod- And an anode member may be disposed between the two anode members to perform an electrochemical reaction. In the case of the cylindrical reaction tank 30, the concentrated wastewater in the first chamber 31 is transferred to the dehydrator 60, and the filtered wastewater in the second chamber 32 is supplied to the oxidation reaction tank 40, .

Next, the wastewater discharged to the treatment water tank 50 is subjected to a self-weight or a sedimentation process using a flocculant or other adsorption process in the treatment water tank, and then the final discharge is performed. The sedimentation process slows the flow rate of the discharged wastewater to allow sedimentation by gravity, and the adsorption process removes metal components by using activated carbon or an ion exchange process. The wastewater treated by the above precipitation or adsorption process is subjected to metal removal including heavy metals to almost 100% and then to final discharge. Here, the wastewater discharged after the metal ions and the metal salts are removed by applying various known technologies such as coagulation of the residual metal salt by further supplying a coagulant to the treatment water tank 50, thereby satisfying the water quality standards It is desirable to have a level that is as follows.

The wastewater containing sludge in which the metal ions are removed by ultrasonic irradiation and electrolysis in the first chamber 31 is supplied to the dehydrator 60 through a pump. The dehydrator is dehydrated by centrifugal force. Typically, the dehydrator is composed of an inner passage having a plurality of through holes and an outer tube containing the inner tube. The inner tube is rotated so that water is discharged to the outer tube by centrifugal force. The dewatered sludge solid passing through the inner tube is supplied to the drying tank to dry the dewatered sludge solid material. The wastewater collected in the outer tube is supplied again to the inflow tank 20 through the dehydrating transfer pipe according to the concentration of the residual metal, 50).

In addition, the dehydrator 60 can be separated from the solid matter and moisture by applying a known pressure dewatering method other than centrifugal dehydration.

In addition, the dryer 70 can heat the solidified sludge by dewatering and drying the sludge, thereby adding sludge as a fuel additive to be used as fuel or as an additive in molding other building materials. Such a drier can be formed integrally with a dehydrator to simultaneously perform dehydration and drying, and a known dehydrator and dryer can be used.

2, the wastewater discharged from the second chamber 32 of the ultrasonic-electrolytic hybrid reaction tank 30 may be discharged to the treatment water tank 50 through the oxidation reaction tank 40. In the oxidation reaction tank 40, an ozone generator 41 is installed to oxidize the organic matter in the wastewater by spraying ozone into the wastewater flowing into the oxidation tank 40, while oxidizing the dissolved trace metal ions to precipitate in a metal salt form. For example, the experiment results show that the metal ion removal in the ultrasonic-electrolytic hybrid reaction tank 30 is about 95%. In the waste water discharged from the second chamber 32, low-concentration metal It was found to be wastewater. Therefore, the metal ions are precipitated as the metal oxide by the ozone supply by the ozone generator 41. 3, the ozone generating apparatus includes an ozone generating unit 411 generating ozone and a nozzle unit 412 dispersing the ozone generated in the ozone generating unit into the oxidation reaction tank, 412 may be configured such that the entire bottom surface of the oxidation reaction tank is formed as a dispersion plate to supply ozone to the entire surface of the oxidation reaction tank or a plurality of nozzle portions are formed on the bottom surface and side walls of the oxidation reaction tank to supply ozone . In the case where the bottom surface of the oxidation reaction tank is formed of a dispersing plate, an introduction chamber may be formed at a lower portion of the dispersion plate to supply ozone generated from the ozone generating unit to the dispersion plate. It is possible to supply ozone through a pipe connecting the respective nozzle units through the pipe in the ozone generating unit.

The supply of ozone is supplied at a rate of 1 to 4 g O ³ / hr per unit space (m ³ ), preferably 2.0 g O ³ / hr per hour, so that metal ions are oxidized and precipitated as a metal salt. When the amount of ozone is less than 1 g O ³ / hr, it is difficult to provide sufficient reaction with a trace amount of metal ions. When the amount of ozone is more than 4 g O ³ / hr, efficiency is reduced due to excessive supply of ozone. .

3, the wastewater discharged from the second chamber 32 is introduced into the intermediate portion or the lower portion of the oxidation reaction tank 40 by the pump, and the nozzle portion 412 of the ozone generator is brought close thereto. So that the ozone supply can be performed simultaneously with the inflow of the wastewater. Pressure ozone generated in the ozone generating unit 411 is supplied to the transfer tube for transferring the wastewater from the second chamber to the oxidation reaction tank, and the wastewater and ozone are mixed in the transfer process and supplied to the oxidation reaction tank 40, And the supply of ozone to the transfer pipe and the supply of ozone in the oxidation reaction tank can be selected either simultaneously or simultaneously as shown in the figure so that a trace amount of metal ions can be easily precipitated .

The precipitated metal salt is precipitated and collected in the lower part of the oxidation reaction tank 40. In order to facilitate the trapping of the metal salt, the lower surface of the oxidation reaction tank is formed into an inclined surface so as to be concentrated to one side of the bottom surface of the oxidation reaction tank can do.

Further, an agitator is further provided in the oxidation reaction tank 40 so that the wastewater stored in the oxidation reaction tank is stirred to improve the contact property between the ozone and the metal ion, thereby promoting the precipitation of the metal salt.

In addition, when ozone is supplied to the transfer pipe transferred from the second chamber to the oxidation reaction tank, an impeller or a propeller of anti-corrosive material may be installed in the transfer pipe in order to induce mixing of ozone in the pipe.

The wastewater from which the metal salt has been precipitated is supplied to the treatment water tank 50 to be finally discharged. The wastewater supplied to the treatment water tank 50 is taken in the upper part of the oxidation reaction tank 40, It is possible to minimize the inflow into the water tank. Particularly, in order to block the inflow of the metal salt, a filter may be attached to a portion for discharging the wastewater into the treatment tank in the oxidation reaction tank 40 to block the discharge of the metal salt. A vertical partition wall 43 and / or a settling plate 44 may be installed between the inflow section and the outflow section of the oxidation reaction tank 40 to prevent inflow water from flowing out without being treated. In addition, a wiser (42) may be provided on the upper side of the oxidation reaction tank (40) to supply only the upper wastewater, which is a supernatant that flows through the weir, to the treated water tank.

The metal oxide precipitated in the oxidation reaction tank 40 is collected in the lower portion of the oxidation reaction tank 40. The waste water containing the metal salt precipitated in the lower portion is sucked by the pump and supplied to the solid-liquid separator 80, Separator 80 separates the metal salt and water, and the separated water, which is separated water, is re-supplied to the inflow tank through the separated water transfer pipe to perform the heavy metal recovery process to separate the remaining metal salt that has not been separated, ). The solid-liquid separator may be a commonly used apparatus. Preferably, the solid-liquid separator separates water and metal salts through centrifugal separation equipped with a filter drum.

Hereinafter, an operating state of the present invention will be briefly described with reference to FIG. 2,

The sludge containing the heavy metal is supplied to the inflow tank 20 and the sludge containing the metal component including the heavy metal collected in the inflow tank is supplied to the first chamber 31 of the ultrasonic- .

The sludge containing the metal component supplied to the first chamber is supplied to the second chamber 32 only by the filtered wastewater filtered by the vertical filtration wall 33, and the wastewater is stored in each chamber.

At this time, in the first chamber 31, ultrasound is applied to the sludge through the ultrasonic generator 34, and minute bubbles are generated and removed due to cavitation caused by ultrasonic waves, and strong pressure is transmitted, The sludge desorbs and releases the metal ions, and the released metal ions are converted into the dissolved metal ion form.

The metal ions dissolved in the wastewater are allowed to pass through the vertical filtration wall 33 to the second chamber 32 and are discharged to the first chamber 31 and the second chamber 32, When power is applied to the cathode member 36, the metal ions dissolved in the wastewater are electrodeposited to the cathode member 36 of the second chamber and recovered by being separated from the wastewater. The pH can be adjusted by adding acid or alkali to the wastewater in the first chamber or the second chamber to increase the electrochemical extraction of the metal.

Here, the sludge in the first chamber 31 is supplied to the dehydrator 60 and dehydrated, and the dehydrated water is supplied to the inlet tank 20 through the dehydration pipe 61 to perform the metal component separation process again The sludge solid component in the cake state is supplied to the oxidation reactor 40 or the treatment water tank 50. The sludge solid component in the cake state is supplied to the dryer 70 and dried. Thereafter, fuel is produced as fuel material itself or mixed with other fuels.

The wastewater from which the metal ions have been removed from the second chamber 32 is supplied to the oxidation reaction tank 40. The oxidation reaction tank supplies ozone through the ozone generator 41 to oxidize a small amount of metal ions dissolved in the wastewater, .

The precipitated metal salt is precipitated and separated, and the upper wastewater from which the metal salt has been separated is finally discharged through the treatment water tank (50).

The wastewater in the lower part of the oxidation tank 40 where the metal salt has been precipitated is supplied to the solid-liquid separator 80 by a pump to recover the metal components and the separated water is supplied to the inlet tank 20 through the separation water transport pipe 81 So that the metal component separation process is performed again or is transferred to the treatment water tank 50. [

10: Recycling facility
20:
30: Ultrasonic-Electrolysis Hybrid Reactor
31: first chamber 32: second chamber
33: vertical filtration wall 34,37: ultrasonic generator
35: anode member 36: cathode member
40: Oxidation reaction tank
41: Ozone generator 42: Weir
43: barrier wall 44: sedimentation plate
411: ozone generator 412: nozzle unit
50: Treatment tank
60: Dehydrator
61: Dehydration pipe
70: dryer
80: Solid-liquid separator
81: Separation pipe

Claims (8)

In an apparatus for removing or recovering metal components from a sludge containing metal to improve the quality of the sludge,
The inner space is divided into a first chamber and a second chamber by a vertical filtration wall having a filtration membrane or a filter cloth, and a plurality of ultrasonic generators for irradiating a floor or a sidewall with a frequency in the range of 10 to 80 kHz are installed in the first chamber The metal ions are desorbed from the sludge by irradiating ultrasonic waves to the sludge containing the introduced metal components and the anode member is installed in the first chamber or the second chamber and the cathode member is installed in the second chamber, And an ultrasonic-electrolytic hybrid reaction tank in which the metal component is separated from the sludge by being passed through a filtration membrane or a filter cloth of a filtration wall and attached to an anode member of a second chamber. The method according to claim 1,
The ultrasonic-electrolytic hybrid reaction tank comprises:
Wherein the first chamber and the second chamber are partitioned by a cylindrical vertical filtration wall having a filter cloth or a filtration membrane, and an anode member in the form of a cylindrical net is provided in the first chamber or the second chamber, Wherein the metal ions desorbed from the sludge are attached to the cathode member of the second chamber through the filtration membrane or filter cloth of the vertical filtration wall so that the metal component is separated from the sludge. . delete 3. The method according to claim 1 or 2,
Wherein the ultrasonic generator is installed on the bottom or side wall of the second chamber in a plurality of ways, and the metal attached to the cathode member is peeled off and removed by irradiating a frequency in a range of 10 to 80 kHz. . 3. The method according to claim 1 or 2,
An inlet tank for storing wastewater containing metal sludge supplied to a first chamber of the ultrasonic-electrolytic hybrid reaction tank;
A treatment water tank for trapping wastewater discharged from a second chamber of the ultrasonic-electrolytic hybrid reaction tank and adsorbing or ion-exchanging the residual metal and finally discharging the residual metal;
A dehydrator for collecting and discharging the wastewater discharged from the first chamber of the ultrasonic-electrolytic hybrid reaction tank and discharging the dehydrated water to the inflow or treatment water tank through a dehydration pipe;
And a dryer for drying the solidified sludge discharged from the dehydrator to convert it into fuel. 6. The method of claim 5,
An oxidation reaction tank in which an ozone generator is installed is further provided between the ultrasonic-electrolytic hybrid reaction tank and the treatment water tank to oxidize organic substances and trace metal ions contained in the wastewater discharged from the second chamber to precipitate and remove metal salts , And only the wastewater from which the metal salt has been removed is discharged to the treated water tank. The method according to claim 6,
A solid-liquid separator for receiving wastewater containing a metal salt from the oxidation reaction tank and separating the metal salt;
And a separation water transfer pipe for supplying separated water separated in the solid-liquid separator to an inflow tank or a treatment water tank. The method according to claim 6,
Wherein a settling plate and a wier are provided on the upper side of the oxidation reaction tank to discharge the upper wastewater which flows over the weir to the treated water tank.

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