KR102144250B1 - Apparatus for purifying wastewater - Google Patents

Abstract

The present invention relates to a purification apparatus wherein wastewater is purified after organic sludge and microorganisms of the wastewater are moved to an organic solvent layer, thereby being used as water. More particularly, according to the present invention, a wastewater purification apparatus using solvent extraction comprises a purification apparatus purifying the wastewater separated by moving the organic sludge and the microorganisms of the wastewater to the organic solvent layer. The purification apparatus comprises: a storage tank temporarily storing wastewater supplied through a supply pipe; a connection pipe formed in a U-shape and connecting one side and the storage tank through a pipe to filter impurities having an iron component included in the moving wastewater; a magnetic member disposed on the outer surface of the lower part of the connection pipe and installed to primarily separate the impurities by magnetic force activated by a control signal in the connection pipe; and a precipitation tank connected to the other side pipe of the connection pipe, storing the wastewater from which the impurities are primarily removed, and secondarily separating the impurities included in the wastewater by a precipitation effect.

Description

Wastewater purification device for sewage treatment system using solvent extraction{Apparatus for purifying wastewater}

The present invention relates to a purification device capable of purifying the separated wastewater and utilizing it as water after the organic sludge and microorganisms of sewage move to the organic solvent layer and are separated from the wastewater.

According to the London Convention, the Republic of Korea will be banned from dumping sewage sludge at sea from 2014. Accordingly, the development of technology that can efficiently treat sewage is an urgent reality.

In the existing treatment method, a polymer coagulant is used to coagulate/precipitate organic sludge, microorganisms and heavy metals, etc. existing in sewage into a lump together with water.

According to this treatment method, sludge lumps having a specific gravity of about 12 are separated/recovered.

The reason for such agglomeration is that water acts as a medium connecting particles under conditions of 25% or more water content.

There are two reasons why the water content is 25% or more when a polymer coagulant is used. First, because the particles of organic sludge generally have a small particle size of less than 200 μm, the capillary existing between them is also narrow, so the outermost angle cannot be easily removed. The second is because microorganisms present in sewage are not destroyed, and body water existing inside the microorganisms accounts for about 40% of the total water after coagulation treatment.

For this reason, in the existing method, only 15-20% of the remaining 60% of the outermost water can be dehydrated through mechanical dehydration, excluding 40% of the body water present in the microorganism.

Therefore, in the existing treatment method, secondary treatment such as heat treatment/drying and incineration was required to meet the moisture content standard for recycling or landfill treatment.

In order to solve this problem, a sewage treatment method of Korean Patent Publication No. 10-2015-56429 (published date: May 26, 2015) is disclosed as another conventional technology shown in FIG. 1, and the treatment method includes sewage and sewage. Disclosed is a method of treating sewage by mixing a solvent and extracting at least a portion of the sludge with the solvent, separating the wastewater and the solvent after the extraction, and first separating the solvent and the sludge. In the process of separating the wastewater phase and the organic solvent phase, as described in step S300 of the identification number [0039] and [0040] of the prior art, after appropriate treatment of the separated wastewater, industrial/ Although it is described as being used as water for living/agricultural use or to be discharged, the treatment process, that is, the purification process of wastewater containing impurities of iron, is not easy, so there is a problem with the use of the water channel as well as the discharge that is concerned about environmental pollution. There was this.

Korean Patent Publication No. 10-2015-56429 (Publication date: 2015.05.26.) Domestic Registration Utility Model No. 20-0379769 (Announcement date: 2005.03.15.) Domestic registration patent No. 10-0394997 (announcement date: 2003.08.21.)

In order to solve the above-described conventional problem, the present invention purifies the impurities of the iron component contained in the wastewater before using the wastewater separated in the process of separating the wastewater phase and the organic solvent phase as water and provides them as water. It is intended to provide a device and has its purpose.

In order to solve the above technical problem, the wastewater purification apparatus for a sewage treatment system using solvent extraction according to the present invention is a sewage treatment system using solvent extraction, wherein the sewage treatment system includes organic sludge and microorganisms of the sewage as an organic solvent layer. It includes a purification device for purifying the separated wastewater by moving, wherein the purification device comprises a receiving tank for temporarily storing the wastewater supplied through a supply pipe, and has a'U' shape, and one side is connected to the receiving tank A connecting pipe through which impurities having iron components contained in the moving wastewater are filtered, and provided on the outer surface of the lower part of the connecting pipe, so that the impurities can be primarily separated in the connecting pipe by magnetic force activated by a control signal. It includes a magnetic member to be installed and a sedimentation tank that is connected to the other side of the connecting pipe, but receives the wastewater from which impurities have been primarily removed, and secondarily separates impurities contained in the wastewater by sedimentation. It features.

In addition, the magnetic member is installed close to the outer surface of the lower part of the connection pipe, and magnetic force is selectively activated by a control signal from the control unit, so that impurities of wastewater moving inside the connection pipe are attached to the inner wall of the connection pipe by the corresponding magnetic force. And an electromagnet that allows one end to be connected to the connection pipe and the other end to the discharge pipe connected to the sedimentation tank and to the discharge pipe to be opened and closed by a control signal from the control unit, and connected to the connection pipe by the electromagnet. Includes a check valve that allows the impurities to be supplied to the sedimentation tank, wherein the electromagnet is in an OFF state when the check valve is open, and is activated in an ON state when the check valve is closed. It is preferably controlled by a control unit.

In addition, the connection pipe further includes an on/off valve that is opened and closed by a control signal from the control unit, wherein the on/off valve is controlled by the control unit to be in a locked state when the check valve is opened, and to have an open state when the check valve is closed. It is preferable to prevent wastewater containing impurities from flowing into the connection pipe when impurities are transferred through the discharge pipe.

In addition, the sedimentation tank is pipe-connected so that one end is in communication with the inside of the sedimentation tank, but the other side is connected to the supply pipe, so that the sediment deposited on the inner bottom surface of the sedimentation tank is supplied back to the supply pipe together with wastewater by a circulation motor. It further includes a water return pipe to allow the water return pipe to be further provided with a filter is preferable.

According to the present invention, in the process of separating the wastewater phase containing iron-based impurities and the organic solvent phase differently from the prior art, magnetic force applied from the outside of the connecting pipe before the wastewater flows into the sedimentation tank through the receiving tank By providing a member to first separate impurities in the connecting pipe, and to obtain purified water through a multi-stage process so that impurities are separated secondarily in the sedimentation tank, the primary separated wastewater is It has the effect of obtaining purified water that is easy to use as water.

1 is a flow chart showing a conventional sewage treatment method.
Figure 2 is a flow chart of a sewage treatment process equipped with a wastewater purification device for a sewage treatment system using solvent extraction according to the present invention.
3 is a conceptual diagram showing a wastewater purification device for a sewage treatment system using solvent extraction according to the present invention.
Figure 4 is a cross-sectional view of Figure 3;
Figure 5 is an enlarged view showing a connection pipe to the wastewater purification device for a sewage treatment system using solvent extraction according to the present invention.
Figure 6 is another embodiment of Figure 5;
7 to 9 are operational relationships for the wastewater purification device for a sewage treatment system using solvent extraction according to the present invention.
10 is an enlarged view of part A of FIG. 9.

Hereinafter, other objects and features of the present invention in addition to the above objects will be clearly revealed through the description of embodiments with reference to the accompanying drawings, and unless otherwise defined, all terms used herein including technical or scientific terms are It has the same meaning as commonly understood by those of ordinary skill in the art to which the invention belongs. Terms such as those defined in a commonly used dictionary should be interpreted as having a meaning consistent with the meaning of the related technology, and should not be interpreted as an ideal or excessively formal meaning unless explicitly defined in this application. Does not.

Hereinafter, a wastewater purification device for a sewage treatment system using solvent extraction according to the present invention (hereinafter, simply referred to as a'purification device') will be described in detail with reference to the accompanying drawings.

Prior to the description, the purification device 1 in the present invention is a prior art of the Korean Patent Publication No. 10-2015-0056429 (see FIG. 1) of "Sewage treatment method including sludge and wastewater using solvent extraction". After the organic sludge and microorganisms of the sewage, which are the S200 step of the treatment step, move to the organic solvent layer and are separated from the wastewater, the iron component contained in the separated wastewater is separated in the process of separating the wastewater phase and the organic solvent phase in step S300. It is a device for purifying impurities, and in order to clarify the gist of the present invention, the contents of "the treatment method of sewage including sludge and wastewater using solvent extraction" are replaced with the description of the prior art, but the purifying apparatus of the present invention Note that it is described as the contents of the structure and structure for (1).

First, as shown in Figs. 2 and 3, the purification device 1 according to the present invention is largely a receiving tank 10, a connection pipe 20, a magnetic member 30, a settling tank 40 and the above It consists of a configuration including a control unit 50 for controlling at least one of the configurations.

In more detail, as shown in FIG. 4, the receiving tank 10 is a connection pipe that is temporarily accommodated in the process of separating the wastewater phase and the organic solvent phase, which is the step S300 of the prior art, and will be described later. It is a configuration for separating impurities by flowing the wastewater into the sedimentation tank 40 by a predetermined amount through (20).

The receiving tank 10 is formed in the shape of a hollow enclosure, but its upper part is closed so that it can be opened or closed by an opening or a cover, and it is connected to a supply pipe 11 that supplies wastewater containing impurities, so that the corresponding wastewater is introduced into the tank. Make it possible.

At this time, the supply pipe 11 is connected to the water return pipe 41 to be described later, but the primary and secondary purified wastewater moved along the water return pipe 41 by a check valve controlled to be opened and closed by the control unit 50 It is desirable to have a process in which impurities can be separated again by being exchanged so that they can be re-accepted into the receiving tank 10 (see FIG. 9).

In addition, a plurality of water level sensors (not shown) electrically connected to the control unit 50 may be further provided inside the receiving tank 10, and the receiving tank 10 through detection of such a plurality of water level sensors (not shown) It is possible to check the capacity of wastewater to be accommodated in the facility.

And, as shown in Figures 4 and 5, the connecting pipe 20 is connected to the pipe so that one end is in communication with the interior of the receiving tank 10, but the other end is connected to the settling tank 40 to be described later, This is a configuration for providing a moving path through which wastewater from which impurities are primarily separated by the member 30 can be introduced from the receiving tank 10 to the sedimentation tank 40.

As shown in the present invention, the connection pipe 20 is formed to have a'U' shape as a whole, but any one (inlet side) of both ends forming the one and the outlet is connected to the receiving tank 10 and , The other (exit side) is connected to the settling tank 40 and the pipe.

Here, a magnetic member 30 to be described later is provided close to the outer surface of the convex portion 21 formed to be connected to both ends, and the iron component contained in the wastewater moving in the convex portion 21 by the magnetic force of the magnetic member 30 The impurities are attached to the inner wall of the connector 20 so that the state in which movement is impossible can be maintained.

In addition, the upper portion of the discharge pipe 33 is connected to the outer surface of the convex part 21, so that impurities caught by attaching to the inner wall of the connection pipe 20 primarily by the magnetic member 30 are passed through the discharge pipe 33 together with the wastewater. To be resupplied to the return pipe (41).

At this time, one of both ends of the connection pipe 20 connected to the convex part 21 is opened and closed by a control signal from the control unit 50 to temporarily prevent the movement of wastewater moving from the receiving tank 10 to the settling tank 40. It is preferable that an on/off valve 23 that can be stopped is further provided so that impurities are attached through the magnetic member 30 in the connection pipe according to whether the on/off valve 23 is opened or closed.

On the other hand, the convex portion 21 may be formed to have a plurality of shapes adjacent to each other, as shown in FIG. 6, in this case, a plurality of magnetic members 30 to be described later are installed to each of the convex portions ( It is also possible to have a structure in which impurities are sequentially separated in 21).

In addition, the magnetic member 30, as shown in Figs. 4 and 5, the outer surface of the above-described connection pipe 20, that is, the convex portion 21 so that the magnetic force can be activated by a control signal from the control unit 50 The impurities contained in the wastewater which are installed close to and move inside the convex part 21 by the magnetic force are attached to the inner wall of the connecting pipe 20 so that impurities contained in the wastewater can be filtered out firstly. It includes an electromagnet 31, a discharge pipe 33 and a check valve 35 as a configuration for.

For example, the electromagnet 31 selectively activates magnetic force according to the voltage applied from the control unit 50, but at least one is installed close to the outer surface of the convex part 21 to be included in the wastewater present in the convex part 21 Impurities, that is, impurities of iron components are attached to the inner wall of the connecting pipe 20 by their magnetic force and are installed so that they cannot be moved to the sedimentation tank 40, so that impurities contained in the wastewater moving to the sedimentation tank 40 are 1 Make it possible to separate them separately.

In addition, the electromagnet in the present invention is shown to be located under the convex portion 21 formed in the connection pipe 20, but this is only one embodiment, and if necessary, the convex portion in addition to the convex portion 21 (21) It can be installed at both ends of the connecting pipe 20 connected to the (21), but in this case, it is preferably installed to be located below the on/off valve 23 and after being activated by the closing of the on/off valve 23, the Impurities contained in wastewater to be moved from the connection pipe 20 to the sedimentation tank 40 can be fixed by magnetic force.

As shown, the upper portion of the discharge pipe 33 is pipe-connected so as to be in communication with the inside of the connection pipe 20, that is, the convex portion 21, but the other end is pipe-connected to communicate with the inside of the return pipe 41, and the control unit ( A check valve 35 capable of being opened and closed by a control signal of 50 is provided, and the wastewater present in the convex portion 21 is opened and closed by the check valve 35 through the discharge pipe 33 and the water return pipe 41 ) To move to (see Fig. 8)

At this time, the check valve 35 is activated in an ON state only when the electromagnet 31 is in an OFF state, so that impurities adhering in the convex part 21 by the magnetic force of the electromagnet 31 together with the wastewater. It is desirable to be able to move to the return pipe 41 through the discharge pipe 33.

And, referring again to Figure 4, the sedimentation tank 40 is the wastewater that is first separated by the magnetic member 30 described above, but impurities that may still be contained in the wastewater are precipitated by their own weight and the precipitated impurities It includes a return pipe 41, a circulation motor 45, and a filter 47 as a configuration for secondary separation.

The sedimentation tank 40 is formed to have the same shape as the receiving tank 10 described above, but one side of the outer surface is connected to the connection pipe 20, and in the lower part of the other side, the sediment can be easily introduced through the water return pipe 41. The water return pipe 41 is connected to the pipe.

At this time, a water purification pipe 43 for discharging the purified water from which the wastewater in which the impurities have precipitated is discharged is connected to the upper side of the sedimentation tank 40, and the water purification pipe 43 is used to supply water required for agriculture or commerce. It is desirable.

As shown, one end is connected to the inside of the sedimentation tank 40, but the other end is installed so that it can be connected to each other with the supply pipe 11, together with the impurities settled under the sedimentation tank 40. The wastewater is moved to the supply pipe 11 so that it can be re-accepted in the receiving tank 10 so that impurities can be separated again by the magnetic member 30 described above. (See FIGS. 9 and 10)

At this time, the outer surface of the water exchange pipe 41 has a structure connected to the lower portion of the discharge pipe 33, but a filter 47 capable of filtering impurities contained in the wastewater flowing from the sedimentation tank 40 in the longitudinal direction may be provided. In addition, it is preferable to allow the wastewater of the sedimentation tank 40 to be easily moved to the supply pipe 11 by the rotational force of the circulation motor 45 to facilitate inflow into the supply pipe 11.

In addition, the filter 47 is also provided in the discharge pipe 33 so that the wastewater from which the impurities are primarily separated can be re-accommodated into the receiving tank 10 through the return pipe 41, and the return pipe 41 A check valve that allows wastewater to move in only one direction is further provided between the supply pipe 11 and the wastewater flowing back through the water return pipe 41 instead of the receiving tank 10 or Do not interfere with the flow.

Hereinafter, with reference to the accompanying drawings will be described with respect to the operational relationship of the purification device 1 according to the present invention.

First, as shown in FIGS. 7 to 9, when wastewater (W/W) flows into the receiving tank 10 through the supply pipe 11 and is temporarily stored, the stored wastewater is passed through the connection pipe 20. It is introduced in a certain amount.

The wastewater introduced into the connecting pipe 20 is introduced into at least one convex portion 21 formed under the connecting pipe 20, and impurities having an iron component contained in the wastewater introduced into the convex portion 21 ( I) is attached to the inner wall of the connection pipe 20 through the magnetic force of the electromagnet 31.

At this time, the control unit 50 turns off the magnetic force of the electromagnet 31 in a state in which the on/off valve 23 is closed, and is applied to the magnetic force along with the wastewater through the discharge pipe 33 connected to the block unit. The impurities separated by this are introduced into the water return pipe 41 together and re-introduced into the receiving tank 10 by the circulation motor 45 so that a repetitive impurity separation process is performed.

Subsequently, the wastewater from which impurities are primarily filtered through the connection pipe 20 is accommodated in the sedimentation tank 40, and is filtered by the magnetic member 30 included in the wastewater contained in the sedimentation tank 40. Unsupported impurities (I') are precipitated to the bottom of the sedimentation tank 40 by their own weight.

In this state, the control unit 50 intermittently operates the circulation motor 45 to allow the wastewater to flow into the return pipe 41 together with the impurities (I') precipitated in the sedimentation tank 40. Impurities are filtered out, and the wastewater flowing into the water return pipe 41 is also re-introduced into the receiving tank 10 by the rotational force of the circulation motor 45 to perform a repetitive purification process (see FIG. 10).

The purification apparatus 1 according to the present invention having the configuration as described above is differentiated from the prior art, in the process of separating the wastewater phase containing the impurities of iron component and the organic solvent phase, the corresponding wastewater passing through the receiving tank 10 The connection pipe 20 before flowing into the sedimentation tank 40 is provided with a magnetic member 30 that applies a magnetic force from the outside to primarily separate impurities within the connection pipe 20, and the primary separated wastewater Purified water is obtained through a multi-stage process so that impurities are secondarily separated in the sedimentation tank 40, thereby obtaining purified water that is easy to use as agricultural or industrial water.

As described above, in the present invention, specific matters such as specific components, etc., and limited embodiments and drawings have been described, but this is provided only to help a more general understanding of the present invention, and the present invention is not limited to the above embodiments. , If a person of ordinary skill in the field to which the present invention belongs, various modifications and variations are possible from these descriptions.

Therefore, the spirit of the present invention is limited to the described embodiments and should not be determined, and all those having variations equivalent or equivalent to the claims, as well as the claims to be described later, will belong to the scope of the inventive concept. .

1: Wastewater purification device for sewage treatment system using solvent extraction according to the present invention
10: receiving tank
11: supply pipe
20: connector
21: convex portion 23: on-off valve
30: magnetic force member
31: electromagnet 33: discharge pipe
35: check valve
40: settling tank
41: water return pipe 43: water purification pipe
45: circulation motor 47: filter
50: control
I,I': impurity
W/W: waste water

Claims (4)

In the sewage treatment system using solvent extraction,
The sewage treatment system includes a purification device 1 for purifying the separated wastewater by moving organic sludge and microorganisms of sewage to the organic solvent layer,
The purification device 1
A receiving tank 10 in which the corresponding wastewater (W/W) supplied through the supply pipe 11 is temporarily stored;
A connection pipe 20 formed in a'U' shape, but one side is connected to the receiving tank 10 to filter impurities (I) having iron components contained in the moving wastewater;
A magnetic member 30 provided on the lower outer surface of the connection pipe 20 so that the impurities are firstly separated from the connection pipe 20 by a magnetic force activated by a control signal; And
A sedimentation tank 40 that is connected to the other side of the connection pipe 20 and receives wastewater from which impurities have been removed, and secondarily separates impurities (I') contained in the wastewater by a sedimentation phenomenon. ); including,
The magnetic member 30 is
It is installed close to the outer surface of the lower part of the connection pipe 20, but the magnetic force is selectively activated by a control signal from the control unit 50, so that impurities in the wastewater moving inside the connection pipe 20 are removed by the corresponding magnetic force. 20) an electromagnet 31 that can be attached to the inner wall;
A discharge pipe 33 having one end connected to the connection pipe 20 and the other end connected to the settling tank 40; And
A check installed in the discharge pipe 33 so that the impurities attached to the connection pipe 20 by the electromagnet 31 can be supplied to the settling tank 40 so as to be opened and closed by the control signal of the control unit Including; valve 35;
The electromagnet 31 is a solvent, characterized in that the check valve 35 is controlled by the control unit 50 to be activated in an OFF state when the check valve 35 is open and an ON state when the check valve 35 is closed. Wastewater purification device for sewage treatment system using extraction.
delete The method of claim 1,
The connection pipe 20 further includes an on/off valve 23 that is opened and closed by a control signal from the control unit 50,
The on/off valve 23 is controlled by the control unit 50 so that the check valve 35 is in a locked state when the check valve 35 is open and an open state when the check valve 35 is closed, so that impurities are removed when impurities move through the discharge pipe 33. Wastewater purification apparatus for a sewage treatment system using solvent extraction, characterized in that preventing the contained wastewater from flowing into the connection pipe (20).
The method of claim 1,
The sedimentation tank 40 is
One end is pipe-connected so as to be in communication with the inside of the sedimentation tank 40, but the other side is connected to the supply pipe 11, so that the sediment deposited on the inner bottom surface of the sedimentation tank 40 is combined with the wastewater by the circulation motor 45. Wastewater for a sewage treatment system using solvent extraction, characterized in that it further comprises a water return pipe 41 to be supplied back to the supply pipe 11, wherein the water return pipe 41 is further provided with a filter 47 Purification device.

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