KR101634774B1 - Jet loop fluidized bed fenton reactor for improving fenton reaction performance and waste water treatment system and the method thereof - Google Patents

Jet loop fluidized bed fenton reactor for improving fenton reaction performance and waste water treatment system and the method thereof Download PDF

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KR101634774B1
KR101634774B1 KR1020150169694A KR20150169694A KR101634774B1 KR 101634774 B1 KR101634774 B1 KR 101634774B1 KR 1020150169694 A KR1020150169694 A KR 1020150169694A KR 20150169694 A KR20150169694 A KR 20150169694A KR 101634774 B1 KR101634774 B1 KR 101634774B1
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fenton
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reaction tank
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이제근
김창훈
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부경대학교 산학협력단
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    • C—CHEMISTRY; METALLURGY
    • C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F1/00—Treatment of water, waste water, or sewage
    • C02F1/72—Treatment of water, waste water, or sewage by oxidation
    • C02F1/722—Oxidation by peroxides
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D35/00—Filtering devices having features not specifically covered by groups B01D24/00 - B01D33/00, or for applications not specifically covered by groups B01D24/00 - B01D33/00; Auxiliary devices for filtration; Filter housing constructions
    • B01D35/02—Filters adapted for location in special places, e.g. pipe-lines, pumps, stop-cocks
    • B01F5/02—
    • C—CHEMISTRY; METALLURGY
    • C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F1/00—Treatment of water, waste water, or sewage
    • C02F1/46—Treatment of water, waste water, or sewage by electrochemical methods
    • C02F1/461—Treatment of water, waste water, or sewage by electrochemical methods by electrolysis
    • C02F1/467—Treatment of water, waste water, or sewage by electrochemical methods by electrolysis by electrochemical disinfection; by electrooxydation or by electroreduction
    • C02F1/4672—Treatment of water, waste water, or sewage by electrochemical methods by electrolysis by electrochemical disinfection; by electrooxydation or by electroreduction by electrooxydation
    • C—CHEMISTRY; METALLURGY
    • C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F1/00—Treatment of water, waste water, or sewage
    • C02F1/70—Treatment of water, waste water, or sewage by reduction
    • C—CHEMISTRY; METALLURGY
    • C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F1/00—Treatment of water, waste water, or sewage
    • C02F1/72—Treatment of water, waste water, or sewage by oxidation
    • C02F1/727—Treatment of water, waste water, or sewage by oxidation using pure oxygen or oxygen rich gas
    • C—CHEMISTRY; METALLURGY
    • C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F2101/00—Nature of the contaminant
    • C02F2101/30—Organic compounds
    • C—CHEMISTRY; METALLURGY
    • C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F2103/00—Nature of the water, waste water, sewage or sludge to be treated
    • C02F2103/30—Nature of the water, waste water, sewage or sludge to be treated from the textile industry
    • C—CHEMISTRY; METALLURGY
    • C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F2103/00—Nature of the water, waste water, sewage or sludge to be treated
    • C02F2103/34—Nature of the water, waste water, sewage or sludge to be treated from industrial activities not provided for in groups C02F2103/12 - C02F2103/32
    • C02F2103/343—Nature of the water, waste water, sewage or sludge to be treated from industrial activities not provided for in groups C02F2103/12 - C02F2103/32 from the pharmaceutical industry, e.g. containing antibiotics
    • C—CHEMISTRY; METALLURGY
    • C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F2301/00—General aspects of water treatment
    • C02F2301/02—Fluid flow conditions
    • C02F2301/024—Turbulent
    • C—CHEMISTRY; METALLURGY
    • C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F2305/00—Use of specific compounds during water treatment
    • C02F2305/02—Specific form of oxidant
    • C02F2305/026—Fenton's reagent

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Abstract

The present invention relates to a jet loop fluidized bed Fenton reactor, a wastewater treatment system, and a treatment method thereof, wherein the Fenton oxidation reaction efficiency is improved; An organic wastewater supply unit for supplying organic wastewater into the reaction tank; A Fenton reagent supply unit for supplying a Fenton reagent containing divalent iron (Fe 2 + ) and hydrogen peroxide (H 2 O 2 ) into the reaction tank; A main body injection nozzle provided at an upper end of the reaction tank for mixing and discharging a gas phase fluid containing oxygen (O 2 ) and a fluid containing a liquid phase fluid in the direction of the lower end of the reaction vessel; The upper and lower ends of which are opened to divide the inner space of the reaction vessel into a lower space for the lower body and a space for the upper body of the lower body to cause the lower body of the lower body to be lowered / Reason for making the flow flow guide tube; An electrode to provide electrons (e < - >) into the reactor; And a fluidized bed filled with a fluidizing medium, the fluidized bed being installed in a weir rising space in the reaction tank divided by the weir body flow induction pipe; and a jet loop fluidized bed Fenton reactor having improved Fenton oxidation reaction efficiency, a wastewater treatment system, and a treatment method thereof Lt; / RTI >

Description

FIELD OF THE INVENTION [0001] The present invention relates to a jet loop fluidized-bed Fenton reactor, an improved wastewater treatment system,

More particularly, to a method for removing toxic and persistent organic pollutants (POPs) in wastewater using a Fenton oxidation reaction, and more particularly, The present invention relates to a jet loop fluidized bed Fenton reactor, a wastewater treatment system, and a method for improving the efficiency of Fenton oxidation reaction by increasing the solubility of oxygen in wastewater by increasing the turbulence intensity by using a jet loop fluidized bed reactor.

In order to increase the efficiency of the existing biological treatment by removing the degradable or toxic organic substances contained in the high concentration industrial wastewater and the chemical oxidation method and to adjust the COD and the refractory organic substances which have not been removed in the biological treatment process to the emission regulation The research used in the treatment has been gradually increasing as the interest in the environment has increased recently.

Wastewater discharged from industrial wastewater, especially dye manufacturing, dyeing, and pharmaceutical companies, contains a large amount of refractory organic matter and is also colored. Industries tend to depend on conventional treatment methods such as coagulation sedimentation, floatation, anaerobic digestion tank, activated sludge, and activated carbon adsorption to treat such wastewater, but the treatment efficiency is low and recently Advanced Oxidation Processes : AOPs).

In particular, Fenton oxidation method is used as an advanced oxidation treatment method for removing toxic and persistent organic pollutants (POPs) in industrial wastewater treatment.

The Fenton oxidation method utilizes Fenton's oxidation reaction. The OH radical (OH) produced during the reaction using a mixed solution of divalent iron (Fe 2+ ) salt and hydrogen peroxide (H 2 O 2 ) (Fenton's reagent)

Figure 112015117273517-pat00001
) Is the oxidizing power of the wastewater. In this way, the Fenton oxidation method can be applied to hydrogen peroxide (H 2 O 2 ) which is a relatively economical oxidizing agent which can be stored easily in the field, easily reactable with various organic substances, and does not cause toxic substances or chromatic substances, So it belongs to a relatively simple method.

For this reason, recent attempts to apply the Fenton oxidation method to industrial wastewater treatment have been actively studied, and it is considered that biodegradable materials are converted into biodegradable materials or toxic wastewater And the post-treatment that treats substances not treated by microorganisms after biological treatment is also becoming diversified.

The main purpose of the Fenton treatment process using the Fenton oxidation reaction is to completely oxidize the organic substances present in the wastewater or to convert the high concentration and poorly decomposable organic substances into the easily decomposable microorganisms in order to reduce the pollutant load, There is a purpose.

That is, the low-concentration organic material can be completely oxidized by using the Fenton reagent to make it harmless, or it can be converted into an easily-processed microorganism by oxidizing the poorly decomposable organic matter having high concentration and low concentration, which is mixed with industrial wastewater, And to convert the aerobic microorganisms, such as activated sludge, to decomposition easily.

The following reactions are generated in the reaction for removing organic substances by the Fenton oxidation.

Fe 2 + + H 2 O 2 - > Fe 3 + + OH - + OH

Figure 112015117273517-pat00002
.........(One)

RH + OH

Figure 112015117273517-pat00003
→ R
Figure 112015117273517-pat00004
+ H 2 O (2)

R

Figure 112015117273517-pat00005
+ H 2 O 2 ? ROH + OH
Figure 112015117273517-pat00006
(3)

R

Figure 112015117273517-pat00007
+ O 2 - > RO 2
Figure 112015117273517-pat00008
.........(4)

In the presence of organic matter in wastewater, the OH radicals (OH) generated in place of the decomposition reaction of hydrogen peroxide (H 2 O 2 )

Figure 112015117273517-pat00009
), The organic material is decomposed to generate a substituted organic material. When the organic material is oxidatively decomposed by the Fenton's oxidation reaction, the reaction finally takes place as in the formula (5).

H 2 O 2 + RH -------------> ROH + H 2 O (5)

As described above, the Fenton oxidation method oxidizes Fe 2 + ions to Fe 3 + by the hydrogen peroxide water to generate OH radicals, and the oxidation reaction proceeds by the OH radicals. In the course of this reaction, Fe 3 + must be reduced to Fe 2 + again by hydrogen peroxide to continue the Fenton oxidation reaction, which is much faster than the rate at which the iron is oxidized, so that trivalent iron accumulation occurs, And the Fe 3 + ion reacts with the OH - ion generated by equation (1) to generate a large amount of iron hydroxide sludge.

In order to solve the problems described above, by supplying electrons and oxygen from the outside through the electrolyte, Fe 3 + is reduced again to Fe 2 + and H 2 O 2 is generated again, thereby reducing the amount of the consumed Fenton reagent , An electrolytic-Fenton process has been developed to reduce the amount of sludge generated and to improve the reactivity of the Fenton oxidation reaction.

The main reaction of the electrolytic-Fenton process is as follows.

Cathode:

O 2 + 2H + + 2e - ? H 2 O 2 (6)

Fe 3+ + e - ? Fe 2+ (7)

Anode:

2H 2 O → 4H + + O 2 + 4e - (8)

Due to these reactions, hydrogen peroxide water is produced and the oxidized trivalent iron (Fe 3+ ) is reduced back to divalent iron (Fe 2+ ). Therefore, it is possible to reduce the necessity of using a large amount of Fenton's reagent, which is a disadvantage of the conventional Fenton oxidation process, and the occurrence of sludge.

On the other hand, as a reactor for carrying out an absorption reaction of a gas into a liquid, there are various types of absorption reactors such as a packed tower, a bubble column, and an agitated vessel, It is applied to various fields.

The packed tower has the advantage of having a high gas-liquid contact area by filling the filling material in the device and spraying the liquid thereon, but has a drawback of high pressure drop. The bubble column has a simple device and easy to manufacture with corrosion resistant material, but has a disadvantage in that the mass transfer efficiency is lower than that of other devices. Agitated vessel has a high turbulence intensity due to agitation of the impeller And a large contact area, thereby improving the mass transfer rate. However, an additional power unit for operating the impeller is required.

On the other hand, the jet loop reactor has a relatively small installation area and it is known that the liquid and the gas circulate through the induction pipe in a constant orbit, and the effect of the smooth gas-liquid mixing and the mass transfer rate is improved.

The Fenton and Electro-Fenton processes may also be carried out in a stirred reactor, fluidized bed reactor, trickle bed reactor, jet-loop reactor (Alfons Vogelpohl, SM, Kim, J. Ind. Eng. Chem., Vol. 10, No. 1, (2004) 33-40).

Korean Patent No. 0506586 applies an ejector type reactor having a vertical downward and upward flow as an oxidation reaction tank in the application of the Fenton oxidation process for treating a high concentration organic matter contained in wastewater of a landfill, In the ejector-type reactor, part of the reaction tank capacity is conveyed to the inside through the ejector head to induce complete mixing by strong vortex, and at the same time, due to the additional oxidation induction of the incomplete oxidation intermediate by oxygen supplied through the ejector, The amount of catalyst and hydrogen peroxide to be used can be reduced, the reaction time can be greatly shortened, and oxidation treatment with improved treatment efficiency can be achieved. Is known.

Korean Patent No. 0541979 relates to a high-grade oxidation reaction apparatus, and more particularly to a Fenton reactor in which a wastewater chemically treated so that iron ions remain and hydrogen peroxide are supplied, a Fenton reactor in which a plurality of Fenton reactors are arranged in parallel, A first optical Fenton reactor for introducing the reaction water, circulating the Fenton reaction water flowing into the Fenton reactor while treating the Fenton reaction water with the optical Fenton reaction water; And a second optical Fenton reactor having a configuration similar to that of the first optical Fenton reactor, in which a plurality of are arranged in parallel and the overflowing water flows in the Fenton reactor and the influxed overflow water is discharged to the final treatment water .

Also, Korean Patent No. 1026641 relates to an apparatus and a method for treating a degradable wastewater using a combined oxidation process combining an electrolysis and a photo-Fenton oxidation process, and more particularly, to a wastewater storage tank in which organic wastewater is stored; An electrolyte injector for injecting Fe 2 + and sodium chloride electrolyte into organic wastewater; An air supplier for supplying air such that oxygen (O 2 ) is dissolved in the organic wastewater into which the electrolyte is injected; A non-septic electrolytic cell in which organic wastewater is charged to oxidize bivalent iron (Fe 2+ ) from the electrolyte, generate free chlorine, and generate hydrogen peroxide to cause a Fenton oxidation reaction to form a hydroxyl radical; A UV light reactor for irradiating the wastewater subjected to Fenton oxidation reaction by the electrolytic bath with UV light; A water collecting tank in which treated water photo-oxidized by UV is collected; A waste water treatment apparatus, and a waste water treatment apparatus.

Korean Patent No. 0592942 relates to an electrolytic reduction type Fenton oxidizing wastewater treatment apparatus, and more particularly, to an Fenton oxidation reaction tank equipped with an inlet and a chemical injection port; There is disclosed a technique relating to a wastewater treatment apparatus having a structure in which a discharge port is formed and a reducing vessel provided with a cylindrical negative electrode and a rod-shaped anode embedded therein is connected to the reaction tank through a lower connection pipe provided with an upper connection pipe and a circulation pump.

However, the Fenton oxidation process described in the above-mentioned prior art is still lacking in the utilization rate of oxygen supplied, and there is room for improvement.

SUMMARY OF THE INVENTION The present invention has been made in order to solve the above-mentioned problems, and it is an object of the present invention to provide a fenton, a photopentone and an electro-Fenton process for removing persistent organic pollutants (POPs) The present invention provides a jet loop fluidized bed Fenton reactor, a wastewater treatment system, and a method for improving the efficiency of the Fenton oxidation reaction by increasing the oxygen dissolution rate into the wastewater by using a fluidized bed reactor.

A jet loop fluidized bed Fenton reactor according to an embodiment of the present invention includes a reaction tank in which a Fenton oxidation reaction is performed; A spray nozzle positioned at a central axis of an upper end portion of the reaction tank and mixing and discharging a gas phase fluid containing oxygen and a liquid phase fluid into a reaction vessel; An induction pipe installed in the reaction tank and having upper and lower ends opened to divide the inner space of the reaction tank into a space where the fluid mixture flow descends and a space where the fluid mixture flow rises; And a flow medium disposed in a rising space of the fluid mixing flow in the reaction vessel divided by the induction pipe.

In addition, in one embodiment, the fluidized medium is sand, SiO 2, Al 2 O 3 , Fe 3 O 4 or FeO. ≪ / RTI >

According to an embodiment of the present invention, the injection nozzle may be located entirely or partially in the inner space of the induction pipe, or may be located in a space above the induction pipe.

According to an embodiment of the present invention, a guide bottom plate is provided at a lower end of the reaction tank below the induction pipe to guide the descended urine along the induction pipe along a space between the induction pipe wall and the reaction tank wall .

According to an embodiment of the present invention, the guide bottom plate is characterized in that the space between the center and the end of the bottom plate is concave downward.

According to an embodiment of the present invention, the jet loop fluidized bed Fenton reactor further includes an electrode unit for supplying electrons (e - ) into the reaction tank.

According to an embodiment of the present invention, the electrode unit is installed on the outer wall of the induction tube and the inner wall of the reaction vessel.

In one embodiment, the reaction tank is characterized in that at least a part of the slanted part, which is perpendicular to the direction of fluid flow, is widened from the lower part to the upper part.

In one embodiment, the space in which the fluid mixing flow rises is provided with a screen at the lower end and / or the upper end of the rising space so that the fluidizing medium fluidized by the upwardly moving fluid mixing flow stays in the rising space .

According to an embodiment of the present invention, a liquid phase circulation outlet for circulating a liquid phase fluid is formed in an upper end wall of the reaction vessel; And a gas phase circulation outlet for circulating the gas phase fluid.

According to an embodiment of the present invention, the at least one circulation pump may include at least one circulation pump for sucking the liquid-phase fluid and the gas-phase fluid from the gas-phase circulation outlet to the installed liquid-

According to an embodiment of the present invention, the liquid phase circulation outlet and the solid phase circulation outlet are provided with a filter for filtering the solid phase material.

In one embodiment, the reactor further comprises a Fenton reagent injecting unit for injecting the Fenton reagent into the reactor at the initial stage of the reaction.

Also, in one embodiment, the reactor includes a reactant discharge unit through which the Fentanyl Redox reaction product is discharged.

According to another embodiment of the present invention, there is provided a wastewater treatment system having an improved Fenton oxidation reaction efficiency, comprising: a jet loop fluidized bed Fenton oxidation reactor; and an wastewater supply unit supplying wastewater to the jet loop fluidized bed Fenton oxidation reactor .

According to another embodiment of the present invention, a method of treating wastewater containing toxic substances and / or Persistent Organic Pollutants includes treating wastewater using the jet loop fluidized bed Fenton reactor .

The present invention relates to a jet loop fluidized bed Fenton reactor, a wastewater treatment system, and a treatment method thereof, in which the efficiency of the Fenton oxidation reaction is improved, and a fluidized bed filled with a fluid medium is disposed in a rising space of a fluid mixing flow in the reactor, The turbulence intensity and the residence time of the gas can be increased. When the jet loop fluidized bed Fenton reactor is applied to the wastewater system, the bubble size of the gas in the reactor is reduced by the fluid medium, the retention time is increased, the turbulence intensity is increased, and the absorption rate of oxygen in the wastewater is increased, The reactivity of the Fenton oxidation reaction is improved and the effect of treating wastewater can be enhanced.

1 is a diagram of a jet loop fluidized bed Fenton reactor in accordance with an embodiment of the present invention.
2 is a diagram of a jet loop fluidized bed electrolytic-Fenton reactor according to one embodiment of the present invention.

Hereinafter, preferred embodiments of the present invention will be described in detail with reference to the accompanying drawings. In order to facilitate the present invention, the present invention provides a jet loop fluidized bed Fenton reactor having improved Fenton oxidation reaction efficiency, A preferred embodiment of the processing method will be described in detail.

Referring to FIG. 1, in a general jet-loop reactor including an induction pipe 150 in a reaction tank 110, a flow medium is placed in a space between an induction pipe wall and a reaction vessel wall, And a reactor arranged to form the fluidized bed (190).

As used herein, the term " jet loop fluidized bed Fenton reactor " refers to a reactor in which the Fenton reaction proceeds in the jet loop fluidized bed reactor.

The term "jet-loop fluidized-bed electrolytic-Fenton reactor" used in the present invention refers to a reactor including an electrode unit 180 for providing electrons so that an electro-Fenton reaction can proceed in the jet-loop fluidized bed reactor.

In the drawings of the present invention, the sizes and dimensions of the structures are enlarged or reduced from the actual size in order to clarify the present invention, and the known structures are omitted so as to reveal the characteristic features, and the present invention is not limited to the drawings .

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, embodiments of the present invention will be described in detail with reference to the accompanying drawings. In the following description, well-known functions or constructions are not described in detail to avoid obscuring the subject matter of the present invention.

 In addition, since the embodiments described in the present specification and the configurations shown in the drawings are only the most preferred embodiments of the present invention and do not represent all the technical ideas of the present invention, It is to be understood that equivalents and modifications are possible.

The present invention relates to a wastewater treatment system for oxidizing an organic matter in wastewater using a Fenton oxidation reaction, wherein the dissolution rate of oxygen to be added for regenerating hydrogen peroxide water (H 2 O 2 ) is increased so that an electro- Thereby improving the efficiency of wastewater removal by the Fenton oxidation reaction.

FIG. 1 illustrates a wastewater treatment system using a jet loop fluidized bed Fenton reactor according to one embodiment of the present invention, and FIG. 2 illustrates a wastewater treatment system using a jet loop fluidized bed electrolytic-Fenton reactor.

As shown therein, the wastewater treatment system of the present invention comprises a Fenton reactor 100 for oxidizing wastewater by a Fenton reaction; An wastewater supply unit 200 for supplying wastewater to the reactor, and a power supply 300 for supplying electricity to the reactor.

At this time, the wastewater treatment apparatus may include a collecting unit (not shown) collecting wastewater treated by the Fenton oxidation reaction for subsequent treatment.

The wastewater treatment apparatus may further include a Fenton reagent injecting unit (not shown) for injecting the Fenton reagent into the reactor at the initial stage of the reaction.

The wastewater supply unit is for supplying wastewater to be treated to the reactor.

The Fenton reactor 100 increases the turbulence intensity by joining the fluidized bed to a general jet loop reactor and reduces the bubble size by bending the gas bubble finely as the fluid medium and fluid mixing flow collide with each other, The dissolution rate into the liquid increases.

The Fenton reactor 100 may include a reaction tank 110 in which the Fenton oxidation reaction is performed; An injection nozzle (140) provided at an upper end of the reaction tank for mixing and discharging gas containing oxygen and wastewater in the direction of the lower end of the reaction tank; A fluid flow induction pipe (150) installed at a lower end of the injection nozzle so as to open the upper and lower ends thereof to divide the inner space of the reaction tank into a falling space of the fluid mixing flow and a rising space of the fluid mixing flow; And a fluidized bed (190) having a flow medium disposed in a space between the wall of the induction pipe (150) and the wall of the reaction tank (110).

The spray nozzle 140 may be located entirely or partially in the inner space of the induction pipe 150 or in a space above the induction pipe 150.

In addition, a liquid phase circulation outlet for circulating the liquid phase fluid is provided in the upper end wall of the reaction tank, and the liquid phase fluid can be sucked from the installed liquid phase circulation outlet using the circulation pump and transferred to the injection nozzle.

Similarly, a gas phase circulation outlet for circulating the gas phase fluid is provided in the upper end wall of the reaction tank, and the gas phase liquid discharged from the gas phase circulation outlet is supplied to the injection nozzle by the circulation pump to circulate.

The circulation pump connected to the liquid phase circulation outlet and the circulation pump connected to the gas phase circulation outlet can be constituted by separate circulation pumps.

In addition, the liquid phase circulation outlet and the gas phase circulation outlet are provided with a filter to filter the solid phase material.

The valve and the flowmeter provided in the connection pipe connecting the circulation pump to the reaction tank and the injection nozzle correspond to known technologies to the extent that they can be easily installed by an ordinary technician, so a detailed description is omitted.

The Fenton reactor 100 may further include a guide bottom plate 170 installed at a lower end of the reaction tank and serving as a guide to guide the fluid mixture flowing down along the inside of the guide pipe 150 along the outside of the guide pipe .

The reactor 100 may further include a Fenton reagent supply unit (not shown) for supplying a Fenton reagent containing divalent iron (Fe 2 + ) and hydrogen peroxide (H 2 O 2 ) into the reaction vessel and / (Not shown).

The operation principle of the Fenton reactor 100 is a reaction tank in which a Fenton oxidation reaction is performed through a liquid injection pipe through which wastewater is injected and an injection nozzle 140 into which a gas injection pipe through which a gas containing oxygen (O 2 ) The fluid mixture (liquid and gas containing wastewater, Fenton's reagent, etc.) is jetted at high speed into the jet flow 110 by a jet flow, and the two-fluid mixture thus injected flows in a fluid flow And then flows down to the lower part of the reaction tank 110 along the inside of the induction pipe 150 and then to the upper part of the reaction tank 110 along the outside of the fluid flow induction pipe 150 and passes through the fluidized bed 190. At this time, the two-fluid stream rising above the reaction tank 110 collides with the fluidizing medium in the fluidized bed 190 while passing through the fluidized bed 190, The bubble size generated from the air bubble is more finely divided. Also, turbulence intensity is increased due to scattering in the direction of the flow of the mixture of the reactants in the fluidized medium, so that the rate and reaction rate of the Fenton oxidation reaction are improved.

Thereafter, the mixed flow of the raw material which has risen above the reaction tank 110 along the outside of the fluid flow induction pipe 150 is formed by the jet flow that is mixed and injected at a high speed into the fluid flow induction pipe 150 from the injection nozzle 140 So that the fluid mixing flow is circulated in the reaction vessel 110. The fluid mixing flow can be circulated in the reaction vessel 110,

As described above, the wastewater, the Fenton reagent, and the gas are actively mixed so that the chemical reactions necessary for the Fenton oxidation reaction actively occur, thereby increasing the efficiency of the Fenton oxidation reaction.

The Fenton reactor 100 of the present invention may be provided with a gas collecting unit for collecting the deaerated gas inside the reaction tank 110. The treated water or gas collected by the treated water collecting unit or the gas collecting unit may include And may be reintroduced into the reaction tank 110 through the injection nozzle 140.

  The circulation guide bottom plate 170 is installed at the lower end of the reaction tank 110 to prevent the mixed flow of the reaction mixture 110 from being stagnated without circulating at the lower end of the reaction tank 110, So that the flow induction pipe 150 can smoothly move to the rising space of the fluid mixing flow outside. For this purpose, it is preferable that the structure of the guide bottom plate 170 is such that a space between the center 171 and the end of the bottom plate is concave downward.

Meanwhile, in the jet-loop fluidized-bed reactor, the shape of the reactor may be such that at least a part of the slanted part, which is perpendicular to the direction of fluid flow, is widened from the lower part to the upper part. When the inclined portion is present, the linear velocity at the time of rising of the fluid mixture flow decreases gradually toward the inclined portion, so that the flow medium can be adjusted so as not to overflow in the fluidized bed space.

In addition, in the space where the fluid mixing flow in the reactor rises, a screen may be installed at the lower end and / or the upper end of the rising space so that the flowing medium fluidized by the ascending moving fluid mixing stream stays in the rising space .

2 is a view for explaining a jet loop fluidized bed electrolytic-Fenton reactor according to an embodiment of the present invention.

2, the Fenton reactor 100 according to another embodiment of the present invention can be manufactured by flowing an electric current into a reaction tank 110 using electrodes 180 composed of a cathode and an anode in a reaction tank 110 sent by increasing the hydrogen peroxide generating effect, 3 gacheol (Fe 3+) 2 gacheol (Fe 2+) 2 gacheol supplied to the reaction tank 110 by increasing the performance is reduced to the (Fe 2+) and hydrogen peroxide (H 2 O 2 ) can be further reduced.

More specifically, the Fenton reactor 100 shown in FIG. 2 of the present invention includes an electron necessary for hydrogen peroxide generation and an electron necessary for reducing trivalent iron (Fe 3+ ) to divalent iron (Fe 2+ ) (Fe 3+ ) to divalent iron (Fe 2+ ) in the reaction tank 110 by effectively supplying hydrogen peroxide (H 2 O 2 ) The Fenton's reagent (Fe 3+ and H 2 O 2 ) supplied to the reaction tank 110 for the reaction can be saved, and the Fenton reactor can be operated at a low cost.

At this time, the electrode may be installed inside the reaction tank, but it can be usually recognized that the electrode can be installed at an appropriate position outside the reaction tank.

As described above, the minute bubbles generated from the injection nozzle 140 are made finer and turbulent by the flow medium to increase the rate of oxygen (O 2 ) required to generate hydrogen peroxide (H 2 O 2 ) The generation rate of hydrogen peroxide can be further improved.

As described above, the Fenton reactor 100 of the present invention is capable of controlling the absorption rate and the residence time of the gas in the liquid through the injection nozzle 140, the fluid flow induction pipe 150, and the fluidized bed 190 by using the jet loop- In addition, through the fluidized bed (190) filled with the fluid medium in the reaction tank (110), the efficiency of the Fenton oxidation reaction and the reduction effect of the Fenton reagent can be further improved by further improving the gas absorption rate, the degassing rate, Can be maximized.

The fluidizing medium in the fluidized bed 190 includes a certain amount of sand or particles such as silicon dioxide (SiO 2 ), aluminum oxide (Al 2 O 3 ), magnetite (Fe 3 O 4 ) , iron oxide (FeO) The operation principle of the Fenton reactor equipped with the reformer 190 is as follows.

When the wastewater and the gas containing oxygen (O 2 ) are mixed and sprayed into the reaction vessel 110 from the injection nozzle 140 at a high speed, the mixed-injected two- And then flows downward to the upper part of the reaction tank 110 along the outer side of the fluid flow induction pipe 150 and then to the upper part of the reaction tank 110 while passing through the fluidized bed layer 190. At this time, the fluid mixture flowing up to the upper part of the reaction tank 110 collides with the fluidizing medium in the fluidized bed 190 while passing through the fluidized bed 190, and the bubble size generated from the fluid jetting nozzle 140 And the turbulence intensity is increased due to scattering of the fluid mixing flow impinging on the fluidizing medium in the direction of the fan, thereby improving the rate and reaction rate of the Fenton oxidation reaction.

In addition, as described above, the minute air bubbles generated from the injection nozzle 140 are made finer and turbulent by the fluidizing medium to increase the oxygen (O 2 ) transfer rate required to generate hydrogen peroxide (H 2 O 2 ) The generation rate can be further improved.

On the other hand, as the fluidizing medium, magnetite (Fe 3 O 4 ) Or iron oxide (FeO) is used, Fe 3 O 4 Or FeO can act as a catalyst to further improve the production rate of hydrogen peroxide (H 2 O 2 ) and bivalent iron (Fe 2+ ).

While the present invention has been particularly shown and described with reference to exemplary embodiments thereof, it is clearly understood that the same is by way of illustration and example only and is not to be taken by way of limitation, I will understand. Accordingly, the technical scope of the present invention should be defined by the following claims.

100: Fenton reactor
110: Reactor
140: Ignition body injection nozzle
150: Induction tube for induction flow
160: circulation pump
170: guide bottom plate
180: Electrode
190: Fluidized bed
200: Wastewater supply part
300:

Claims (15)

A reaction tank in which the Fenton oxidation reaction is performed;
A spray nozzle positioned at a central axis of an upper end portion of the reaction tank and mixing and discharging a gas phase fluid containing oxygen and a liquid phase fluid into a reaction vessel;
An induction pipe installed in the reaction tank and having upper and lower ends opened to divide the inner space of the reaction tank into a space where the fluid mixture flow descends and a space where the fluid mixture flow rises; And
And a flow medium disposed in a rising space of the fluid mixing flow in the reactor divided by the induction tube. The method according to claim 1,
The flow medium,
Sand, SiO 2, Al 2 O 3 , Fe 3 O 4 or ≪ RTI ID = 0.0 > FeO. ≪ / RTI > The method according to claim 1,
Wherein the injection nozzle is located entirely or partially in the interior space of the induction tube or in a space above the induction tube. The method according to claim 1,
And a guide bottom plate is installed at a lower end of the reaction tank below the induction pipe to guide the descended urine along the inside of the induction pipe along a space between the induction tube wall and the reaction tank wall. . The method of claim 4,
Wherein the guide bottom plate has a space between the center and the end of the bottom plate is concave downward. The method according to claim 1,
Further comprising: an electrode part for supplying electrons (e - ) into the reaction tank. The method of claim 6,
Wherein the electrode unit is installed on the outer wall of the induction pipe and on the inner wall of the reaction tank. The method according to claim 1,
Wherein the reaction tank has at least a portion of a slanted part such that the cross-sectional area of the reaction tank perpendicular to the fluid flow direction increases from the lower part to the upper part. The method according to claim 1,
Characterized in that the space in which the fluid mixing flow rises is provided with a screen at the lower end and / or the upper end of the upward space so that the flow medium fluidized by the upwardly moving fluid mixing flow stays in the rising space. Fenton reactor. The method according to claim 1,
A liquid phase circulation outlet for circulating the liquid phase fluid in the upper end wall of the reaction vessel; And a gas phase circulation outlet for circulating the gas phase fluid. The method of claim 10,
Wherein the liquid phase circulation outlet and / or the gas phase circulation outlet are provided with a filter for filtering the solid phase material. The method according to claim 1,
Wherein the reactor further comprises a Fenton reagent inlet for injecting the Fenton reagent into the reactor at the beginning of the reaction. The method according to claim 1,
Wherein the reactor comprises a reactant discharge portion through which the Fentanyl Redox reaction product is discharged. A wastewater treatment system for removing irritative and / or toxic organic substances in wastewater,
Jet loop fluidized bed Fenton reactor according to any one of claims 1 to 13: and
A wastewater supply unit for supplying wastewater to the jet loop fluidized bed Fenton reactor; Wherein the waste water treatment system comprises: A method for treating wastewater containing toxic substances and / or persistent organic pollutants, characterized in that the wastewater is treated using the wastewater treatment system according to claim 14.
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CN115321644A (en) * 2022-08-29 2022-11-11 上海环境保护有限公司 Electrically enhanced circulating well system and method for treating halogenated hydrocarbons in underground water by using same

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WO2019050078A1 (en) * 2017-09-06 2019-03-14 (주) 테크로스 Water treatment apparatus using electrolysis and heterogeneous catalytic oxidation reaction
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KR20190071337A (en) * 2017-12-14 2019-06-24 주식회사 네이코스엔지니어링 Development of hybrid-fluidized bed fenton process for non-biodegradable organic wastewater treatment with improved efficiency
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CN109455796A (en) * 2018-12-29 2019-03-12 青岛科技大学 A kind of technique for treating industrial wastewater of zeroth order internal electrolysis of iron coupling internal circulating fluidized bed Fenton
CN109455796B (en) * 2018-12-29 2021-12-14 青岛科技大学 Industrial wastewater treatment process of zero-valent iron internal electrolysis coupling internal circulating fluidized bed Fenton
KR102497835B1 (en) * 2019-10-29 2023-02-09 서울대학교산학협력단 Composition for Fenton oxidation, and a method for the oxidative degradation of organic pollutants using the same
KR20210052340A (en) * 2019-10-29 2021-05-10 서울대학교산학협력단 Fenton oxidation system, and a method for the oxidative degradation of organic pollutants using the same
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