KR20200017117A - Development of hybrid-fluidized bed fenton process for non-biodegradable organic wastewater treatment with High efficiency - Google Patents

Abstract

The present invention relates to a hybrid fluidized bed Fenton treating device for high-efficiency treatment of non-degradable wastewater, which comprises: a reaction bath; a wastewater supply unit; a Fenton oxidation material supply unit; a main supply unit; a crystal; a treated water discharge unit; and a precipitate discharge unit.

Description

Development of hybrid-fluidized bed fenton process for non-biodegradable organic wastewater treatment with High efficiency

The present invention relates to a Fenton treatment device, and more particularly, to improve the treatment efficiency by using fenton oxide and crystals in the hardly degradable sewage water, as well as to reduce the amount of sediment to reduce the cost of the separate treatment process The present invention relates to a hybrid fluidized bed Fenton treatment device for high efficiency hardly degradable sewage treatment.

In general, hardly degradable materials are not treated to satisfy emission control standards only by the activated sludge method, which is a flocculation treatment and a biological treatment.

In order to solve this problem, an oxidation method using a liquid catalyst such as the fenton oxidation method is used.

This fenton oxidation method is treated by supplying iron salt (Fe ㅂ) and hydrogen peroxide (H2O2) (hereinafter referred to as fenton oxide) to hardly degradable contaminants, as disclosed in Japanese Patent Laid-Open No. 2002-0043946.

However, after the reaction in the fenton oxidation process, the catalyst is precipitated to remove contaminants, and a large amount of precipitate is generated.

If the scent of the precipitate is high, as the treatment efficiency of the hardly decomposable substance is lowered, it is necessary to remove the precipitate frequently so that the time for treating the hardly decomposable substance is limited.

In particular, as the removed sediment must be treated separately, there is a problem that the additional process and the resulting cost is increased.

Accordingly, the development of a technology that can reduce the process and cost by minimizing the generation of sediment, as well as the treatment of hardly decomposable material is urgently required.

Accordingly, the present invention has been made to solve the above problems, a reaction tank having a reaction space therein, a wastewater supply unit for supplying wastewater, a fenton oxide supply unit for supplying fenton oxide, the wastewater supply unit and the fenton The main supply unit for supplying the wastewater and fenton oxide supplied from the oxide supply unit to the reaction tank, the sludge generated in the reaction process is attached to the waste space supplied from the main supply unit in a large amount located in the reaction space of the reactor A crystal water, a treatment water discharge part for discharging the treated water treated in the reaction tank, and a sediment discharge part for discharging the sludge precipitated in the sludge generated during the reaction in the reaction tank, By treating contaminants in sewage water by water, the treatment efficiency is improved , It is possible to reduce the amount of sludge that is generated in the precipitation process I capable of reducing sludge treatment cost is an object to provide a hybrid fluidized Fenton treatment for decomposing sewage treatment apparatus.

The present invention for achieving the above object, a reaction tank having a reaction space therein, a wastewater supply unit for supplying wastewater, a fenton oxide supply unit for supplying fenton oxide, the wastewater supplied from the wastewater supply unit and the fenton oxide supply unit and Main supply part for supplying the fenton oxide to the reaction tank, crystals for attaching the sludge generated in the reaction process while flowing to the wastewater supplied in the reaction space of the reactor in large quantities, the treatment treated in the reaction tank A treated water discharge part for discharging water, and a sediment discharge part for discharging the sludge precipitated in the sludge generated during the reaction in the reactor.

Preferably, the apparatus further includes a circulation unit for circulating a portion of the treated water treated in the reaction space unit to the main supply unit.

And the circulation portion, the inlet end is connected to the reaction tank, the outlet end is connected to the main supply portion, and the circulation pump for supplying a portion of the treated water to the lower end of the reaction space through the circulation pipe, do.

The main supply unit may include a supply plate provided at a lower end of the reaction space of the reactor, a supply housing provided at a lower portion of the supply plate, a plurality of injection holes provided in the supply plate, and the supply housing. The sewage for supplying the wastewater and the Fenton oxide supplied from the wastewater supply unit and the Fenton oxide supply unit into the supply space portion of the supply space, and a sediment for moving the sediment of the reaction space portion to the lower side is provided along the outer side of the supply plate. Eastern, includes.

The supply space part of the supply housing includes a first supply space part for moving the wastewater and a second supply space part for moving the fenton oxide.

The supply hole may further include a first supply hole for supplying wastewater to the first supply space part, and a second supply hole for supplying fenton oxide to the second supply space part. The wastewater of the space part is injected through some injection holes, and the fenton oxide of the second supply space part is injected through the remaining injection holes.

And a rotating part for rotating the supply plate.

The rotating unit may include a rotating shaft connected to a supply housing that rotates together with the supply plate, a supply passage therein, and a fixed housing provided in the reaction tank to rotate the supply housing, and to rotate the rotating shaft. It includes a rotary drive, for.

The reactor is provided with a partition wall in a height direction therein, so that the reaction space portion is partitioned into a first reaction space portion and a second reaction space portion, and a large amount of crystals are positioned in the second reaction space portion, and the first reaction space is provided. The wastewater and the fenton oxide are supplied to the part and the second reaction space part through the main supply part.

In addition, the reaction space is partitioned into a plurality of partitions, the first reaction space and the second reaction space is arranged alternately, the first treatment water fenton oxidation treatment in the first reaction space is the circulation portion It is supplied to the second reaction space portion by the secondary treatment by the crystals, which is repeated at least once.

In addition, the reaction space portion of the reactor, the filter membrane for preventing the crystals are discharged to the treated water discharge portion, is further provided.

In addition, the filter membrane, only the liquid passes through, the crystals have micropores for filtering, the first filter membrane provided on the upper end of the reaction space, and the first filter membrane is provided to be spaced apart a predetermined interval below the first filter membrane A second filter membrane for forming a micropores larger than one filter membrane to pass a predetermined size of crystals with the liquid, and the liquid and crystals passing through the second filter membrane is introduced into the inlet of the circulation tube. .

As described above, according to the hybrid fluidized bed Fenton treatment apparatus for hardly decomposable wastewater treatment according to the present invention, as the pollutants of the wastewater are treated by Fenton oxide and crystals, the treatment efficiency is improved, and in the treatment process It is a very useful and effective invention that can reduce the amount of sludge generated and precipitated.

1 is a view showing a Fenton processing apparatus according to the present invention,
2 is a view showing a state in which the circulation unit is further provided in the Fenton processing apparatus according to the present invention,
3 is a view showing the main supply of the Fenton processing apparatus according to the present invention,
Figure 4 is a view showing a plan view of the main supply unit according to the present invention,
5 is a view showing a state in which the rotating part is further provided in the main supply unit according to the present invention,
6 is a view showing another embodiment of a rotating part according to the present invention,
7 is a view showing a reactor of another embodiment according to the present invention.

Hereinafter, preferred embodiments of the present invention will be described in detail with reference to the accompanying drawings. The detailed description, which will be given below with reference to the accompanying drawings, is intended to explain exemplary embodiments of the present invention and is not intended to represent the only embodiments in which the invention may be practiced. The following detailed description includes specific details in order to provide a thorough understanding of the present invention. However, one of ordinary skill in the art appreciates that the present invention may be practiced without these specific details.

In some instances, well-known structures and devices may be omitted or shown in block diagram form centering on the core functions of the structures and devices in order to avoid obscuring the concepts of the present invention.

Throughout the specification, when a part is said to "comprising" (or including) a component, this means that it may further include other components, except to exclude other components unless otherwise stated. do. In addition, the term "... part" described in the specification means a unit that processes at least one function or operation. Also, "a" or "an", "one", "the", and the like shall not be construed herein in the context of describing the present invention (particularly in the context of the following claims). Unless otherwise indicated or clearly contradicted by context, it may be used in the sense including both the singular and the plural.

In describing the embodiments of the present invention, if it is determined that a detailed description of a known function or configuration may unnecessarily obscure the gist of the present invention, the detailed description thereof will be omitted. In addition, terms to be described below are terms defined in consideration of functions in the embodiments of the present invention, which may vary according to intentions or customs of users and operators. Therefore, the definition should be made based on the contents throughout the specification.

Hereinafter, preferred embodiments of the present invention will be described with reference to the accompanying drawings.

1 is a view showing a Fenton processing apparatus according to the present invention, Figure 2 is a view showing a state in which the circulation unit is further provided in the Fenton processing apparatus according to the present invention, Figure 3 is a Fenton processing apparatus according to the present invention 4 is a view showing a main supply unit, Figure 4 is a plan view showing a main supply unit according to the present invention, Figure 5 is a view showing a state in which the rotation unit is further provided in the main supply unit according to the present invention, Figure 6 FIG. 7 is a view showing another embodiment of a rotating unit according to the present invention, and FIG. 7 is a view showing a reactor of another embodiment according to the present invention.

As shown in the drawings, the hybrid fluidized bed Fenton treatment apparatus 10 for the hardly degradable sewage treatment 10 is a reactor 100, the wastewater supply 200, the fenton oxide supply 300, the main supply 400, crystals ( 500), the treated water discharge unit 600 and the precipitate discharge unit 700.

The reaction tank 100 has a reaction space 110 is formed therein, the wastewater supply unit 200 is provided to supply the wastewater.

And the Fenton oxide supply unit 300 is provided to supply the Fenton oxide.

The main supply unit 400 is provided to supply the wastewater and the fenton oxide supplied from the wastewater supply unit 200 and the fenton oxide supply unit 300 to the reaction tank 100. The main supply unit 400 is provided with a mixing chamber 421 at the lower end of the supply housing (420 of FIG. 3) is mixed with the wastewater and fenton oxide flow from the supply hole (440 of FIG. 3), in the mixing chamber The vortex forming protrusion 421a is formed on the side wall, and the discharge hole 421b is formed on one side so that the formed vortex is supplied to the supply plate 410 of FIG. 3.

By such a configuration, the wastewater and the fenton oxide are primarily mixed uniformly in the mixing chamber 421, and the vortex forming projections 421a are formed on the inner wall to ensure more uniform mixing. The flow is guided and rotated by the lower inclined surface of the forming protrusion to form a vortex. At this time, the vortex formed is discharged through the discharge hole (421b) formed on one side of the upper side of the mixing chamber 421 to be more uniformly mixed through the rotation of the fluid.

In addition, a hemispherical protrusion 421c is formed on the inner surface of the mixing chamber 421 at a predetermined interval, and the hemispherical protrusion prevents the formation of a cake on the inner surface of the mixing chamber to increase processing efficiency. Do this.

In addition, the crystal 500 is placed in a large amount in the reaction space 110 of the reaction tank 100 is provided to be attached to the sludge generated in the reaction process while flowing to the wastewater supplied from the main supply unit 400.

Treatment water discharge unit 600 is provided to discharge the treated water in the reaction tank 100, sediment discharge unit 700 to discharge the sludge precipitated in the sludge generated in the reaction process in the reaction tank (100). Is provided for.

According to the hybrid fluidized bed Fenton treatment apparatus 10 for the hardly decomposable wastewater treatment, the wastewater is introduced into the reaction space 110 of the reactor 100 and the fenton oxide is supplied to treat the wastewater. The sludge generated in the treatment process is attached to the crystal 500, and the unattached sludge is precipitated and discharged.

Thus, it is possible to improve the treatment efficiency for wastewater, as well as to reduce the amount of sludge generated and precipitated in the treatment process can reduce the cost for sludge treatment.

Here, as shown in FIG. 2, the hybrid fluidized bed Fenton treatment apparatus 10 for hardly degradable sewage treatment further includes a circulation unit 800.

The circulation part 800 is provided to circulate a part of the treated water treated in the reaction space part 110 to the main supply part 400.

The circulation portion 800 is composed of a circulation pipe 810 and the circulation pump 820.

The inlet end of the circulation pipe 810 is connected to the reactor 100, the outlet end is connected to the main supply unit (400).

And the circulation pump 820 is to supply a portion of the treated water to the lower end of the reaction space 110 through the circulation pipe 810, the main supply 400 to supply to the lower end of the reaction space 110 do.

Here, as shown in FIG. 3, the main supply unit 400 includes a supply plate 410, a supply housing 420, an injection hole 430, a supply hole 440, and a precipitate moving part 460.

The supply plate 410 is provided at the lower end of the reaction space 110 of the reaction tank 100.

In addition, the supply housing 420 is provided so that the supply space 422 is formed on the lower side of the supply plate 410, a plurality of injection holes 430 are provided in the supply plate 410.

The supply hole 440 is provided to introduce the wastewater and the fenton oxide supplied from the wastewater supply unit 200 and the fenton oxide supply unit 300 into the supply space 422 of the supply housing 420.

And the sediment moving part 460 is provided along the outer side of the supply plate 410 is provided so that the precipitated sludge generated in the reaction space 110 moves downward.

Looking at the operation state of the main supply unit 400, the wastewater and the fenton oxide supplied from the wastewater supply unit 200 and the Fenton oxide supply unit 300 is supplied to the supply space 422 through the supply hole 440. Then, it is supplied to the reaction space 110 through a plurality of injection holes 430 is made for the wastewater.

Here, as shown in FIG. 4, the supply space 422 of the rapid housing 420 is divided into a first supply space 422a and a second supply space 422b.

The first supply space 422a is formed to move the wastewater, and the second supply space 422b is partitioned to move the fenton oxide.

And the supply hole 440 is composed of a first supply hole 442 and the second supply hole (444).

The first supply hole 442 is provided to supply wastewater to the first supply space 422a, and the second supply hole 444 is provided to supply fenton oxide to the second supply space 422b. do.

In other words, the wastewater of the first supply space 422a is injected through some injection holes 430, and the Fenton oxide of the second supply space 422b is injected through the remaining injection holes 430.

Thus, the wastewater and the fenton oxide are sprayed together in the reaction space 110 to perform a treatment process.

In addition, as shown in FIG. 5, a rotation unit 450 for rotating the supply plate 410 is further included.

The rotary part 450 is composed of a rotary shaft 452, a fixed housing 454 and a rotary drive unit 456.

The rotary shaft 452 is connected to the supply housing 420 which rotates together with the supply plate 410.

The fixed housing 454 is provided with a supply passage 455 therein, and is provided in the reaction tank 100 so that the supply housing 420 is rotatable.

The rotary drive unit 456 is provided to rotate the rotary shaft 452.

Here, as shown in FIG. 6, the fixed housing 454 includes a first fixed housing 4452 and a second fixed housing 4444.

The first fixed housing 4452 has a first supply passage 4452 formed therein, and the second fixed housing 4504 has a second supply passage 4454 formed therein.

In other words, the wastewater of the wastewater supply unit 200 is supplied to the supply passage 4452 of the first fixed housing 4452, and the wastewater is supplied to the first supply space 422a.

The fenton oxide of the fenton oxide supply unit 300 is supplied to the second supply passage 4454 of the second fixed housing 4544, and the fenton oxide is supplied to the second supply space 422b.

In addition, as shown in FIG. 7, the reactor 100 has a partition wall 120 in a height direction therein, such that the reaction space 110 is provided with a first reaction space 112 and a second reaction space 114. Partition into

A large amount of crystals 500 are located in the second reaction space 114.

The wastewater and the fenton oxide are supplied to the first reaction space 112 and the second reaction space 114 through the main supply 400.

Thus, the wastewater is treated by the Fenton oxide in the first reaction space 112, sludge generated during the treatment is precipitated.

In the second reaction space 114, the wastewater is treated by Fenton oxide, and the sludge generated during the treatment is treated by the crystal 500.

In one embodiment, the reaction space 110 is divided into at least one by the partition wall 120, when a plurality of compartments, the first reaction space 112 and the second reaction space 114 alternate. It is preferred to arrange.

Of course, the plurality of first reaction spaces 112 and the plurality of second reaction spaces 114 may be arranged adjacent to each other.

Here, the first treated water fenton-oxidized in the first reaction space 112 is supplied to the second reaction space 114 by the circulation unit 800 to react with the fenton oxide and be secondary treated.

Of course, after the first treatment water, which is fenton-oxidized in one of the first reaction spaces 112, is secondly treated in the second reaction spaces 114, the third treatment is performed through the other first reaction spaces 112. Naturally, it can be processed, and may go through further processing.

Thus, as well as improving the treatment efficiency for sewage water, it is possible to reduce the amount of sediment to reduce the cost for sediment treatment.

As shown in FIG. 7, the reaction space part 110 of the reaction tank 100 further includes a filter membrane 900 for preventing the crystals 500 from being discharged to the treated water discharge part 600.

The filter membrane 900 includes a first filter membrane 910 and a second filter membrane 920.

Only the liquid passes through the first filter membrane 910, and the crystals 500 have micropores for filtering and are provided at the upper end of the reaction space 110.

The second filter membrane 920 is provided below the first filter membrane 910 so as to be spaced apart at a predetermined interval so that larger pores are formed than the first filter membrane 910 so that the crystal 500 having a predetermined size together with the liquid is formed. To be passed.

Naturally, the crystal 500 that does not pass through the second filter membrane 920 is naturally attached to the sludge in the reaction space.

Here, the wastewater, the Fenton oxide and the crystal 500 positioned between the first filter membrane 910 and the second filter membrane 920 are moved to the main supply unit 400 through the inlet of the circulation pipe 800. Again circulated to the reaction space 110.

Thus, the wastewater treatment efficiency is further improved.

10: Fenton processing apparatus 100: Reactor
200: wastewater supply unit 300: fenton oxide supply unit
400: main supply unit 500: crystals
600: treated water discharge part 700: sediment discharge part
800: circulation

Claims (9)

Reactor having a reaction space therein;
A wastewater supply unit for supplying wastewater;
Fenton oxide supply unit for supplying the fenton oxide;
A main supply unit for supplying the wastewater and the fenton oxide supplied from the wastewater supply unit and the fenton oxide supply unit to the reactor;
Crystals for being attached to the sludge generated in the reaction process is located in the reaction space of the reactor in a large amount flows to the waste water supplied from the main supply;
A treatment water discharge unit for discharging the treatment water treated in the reaction tank; And
Including; sediment discharge unit for discharging the sludge precipitated in the sludge generated in the reaction process in the reactor;
The main supply unit,
A supply plate provided at the lower end of the reaction space of the reaction tank;
A supply housing provided to provide a supply space portion under the supply plate;
A plurality of injection holes provided in the supply plate;
A supply hole for introducing the wastewater and the fenton oxide supplied from the wastewater supply unit and the fenton oxide supply unit into the supply space part of the supply housing; And
Includes; is provided along the outer portion of the supply plate for moving the precipitate to move the precipitate in the reaction space downward;
A mixing chamber is provided at the lower end of the supply housing, in which Hape water and Fenton oxide are introduced and mixed from the supply hole. Is formed on one side,
Hybrid fluidized bed Fenton processing apparatus for treatment of difficult-decomposable wastewater, characterized in that hemispherical protrusions are formed on the inner surface of the mixing chamber at regular intervals. The method of claim 1,
And a circulation unit configured to circulate a portion of the treated water treated in the reaction space to the main supply unit. The method of claim 2, wherein the circulation unit,
An inlet end connected to the reactor and an outlet end connected to the main supply part; And
And a circulation pump for supplying a part of the treated water to the lower end of the reaction space through the circulation pipe. The method of claim 3,
Hybrid fluidized bed Fenton processing apparatus for treating hardly decomposable sewage water; Rotating portion for rotating the supply plate. The method of claim 4, wherein the rotating unit,
A rotary shaft connected to a supply housing which rotates together with the supply plate;
A fixed housing having a supply passage therein and provided in the reaction tank so that the supply housing is rotatable; And
Hybrid fluidized bed Fenton processing apparatus for treating hardly decomposable sewage water, comprising: a rotary drive unit for rotating the rotary shaft. The method of claim 2,
The reaction tank is provided with a partition wall in a height direction therein to partition the reaction space into a first reaction space and a second reaction space,
A large amount of crystals are located in the second reaction space portion,
Hybrid fluidized bed fenton treatment apparatus for treating hardly decomposable wastewater, characterized in that wastewater and fenton oxide are supplied to the first reaction space portion and the second reaction space portion through the main supply portion. The method of claim 6,
The reaction space is divided into a plurality of partitions,
The first reaction space portion and the second reaction space portion are alternately arranged;
The primary treated water, which is fenton-oxidized in the first reaction space part, is supplied to the second reaction space part by the circulation part, and is secondly treated by crystals.
Hybrid fluidized bed fenton treatment apparatus for treatment of difficult-decomposable sewage, characterized in that it is repeated at least one or more times. The reaction space portion of the reactor,
And a filter membrane for preventing the crystals from being discharged to the treated water discharge part. The method of claim 8, wherein the filter membrane,
Only a liquid passes through, the crystal has a micropores for filtering, the first filter membrane provided on the upper end of the reaction space; And
And a second filter membrane disposed below the first filter membrane to be spaced apart from each other by a predetermined interval, so that micropores larger than the first filter membrane are formed to pass crystals of a predetermined size together with the liquid.
Hybrid fluidized bed Fenton processing apparatus for hardly decomposable sewage treatment, characterized in that the liquid and crystals passing through the second filter membrane to the inlet end of the circulation pipe.

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