KR101154316B1 - Recycling system for absorption liquid - Google Patents

Abstract

The present invention by removing the dust and gaseous contaminants through the dust removal device and the gaseous contaminant removal device in the flush prevention facility containing dust and gaseous contaminants, by reducing the waste absorbing liquid treatment cost by extending the period of use of the absorbing liquid It is possible to improve the efficiency of removing dust and gaseous pollutants, and to provide an absorption liquid recycling apparatus that can minimize complaints of local residents due to odor.
In the present invention, the contaminated absorbent liquid stored in the chamber of the flush prevention facility is transferred to the dust removing apparatus, and the sludge is formed by condensation of dust, suspended particles, and organic matter contained in the absorbent liquid by the coagulant, and the sludge is generated in the mixing chamber. Injured sludge is discharged from the dust removal device by removing the dust and the like as the sludge is stored in the sludge storage tank by the skimmer, and the primary treated water is transferred to the gaseous pollutant removal device. Circulating the electrolysis device and the sump, the gaseous contaminants contained in the primary treatment water are directly decomposed by the radicals generated on the electrode surface of the electrolysis device, and the activated chlorine generated by the redox reaction of the electrode with the injected sodium chloride By the indirect oxidation of the secondary treatment water from which the gaseous pollutants have been removed, When providing the absorbent recycling system, which can be recycled into the absorbing solution in the flush control facilities.

Description

Recycling system for absorption liquid

The present invention relates to an absorbent liquid recycling apparatus, and more particularly, to an absorbent liquid recycling apparatus for removing dust and gaseous contaminants contained in the absorbent liquid to recycle the contaminated absorbent liquid in a flushing prevention facility.

In general, a flushing prevention facility is a device that removes dust and gaseous contaminants contained in the air at the same time.The core manufacturing process, molten metal injection process, demolding process, etc., in which casting dust and odors (phenol, amines, etc.) are generated a lot. It is widely applied as a post-treatment facility.

Such flushing prevention facilities include wet electrostatic precipitators and scrubbers.

1 is a schematic view showing the configuration of a scrubber, a conventional scrubber is a porous polling (5) installed in multiple stages inside the chamber (2) containing a predetermined amount of absorbent liquid, and on top of the polling (5) An injection nozzle 7 to be installed, a pump 3 for pumping the absorbing liquid contained in the chamber 2 to the injection nozzle 7, and an injection nozzle 7 installed above the injection nozzle 7. It comprises a demister (8) for preventing the fine absorption liquid particles generated by the discharge to the outside air with the clean air treated.

Looking at the operation of these scrubbers are as follows.

When the contaminated air enters through the inlet 1 of the lower part of the chamber 2, it passes through the through hole of the support plate 4 and moves to the outlet 9 of the upper part of the chamber 2, which is stored at the bottom of the chamber 2. The absorbing liquid is supplied to the injection nozzle 7 through the pipe 6 by the pump 3.

The injection nozzle 7 injects the supplied absorbent liquid into the contaminated air. As a result, the injected absorbent liquid comes into contact with dust and gaseous contaminants to remove dust and gaseous contaminants from the air.

At this time, the contact time of the contaminated air and the absorbent liquid is ensured by the polling (5). As the air and the absorbent liquid flow along the empty space of the polling (5), the flow path is changed so that the absorbent liquid and the contaminated air for a longer time. It is possible to contact, thereby increasing the removal efficiency.

In order to further increase the removal efficiency of pollutants, the polling 5 is installed in multiple stages in the chamber 2.

However, if the absorbent is used for a long time in the scrubber as described above, as the dust concentration of the absorbent liquid is increased, the injection nozzle is gradually blocked, which makes it difficult to properly spray the absorbent liquid, which in turn lowers the removal efficiency of dust and gaseous contaminants. .

In addition, as the absorbent liquid itself is oversaturated with gaseous contaminants, a problem of inefficient removal of dust and gaseous contaminants from air occurs.

Therefore, it is necessary to dispose the absorbent liquid periodically (usually 1 month), but if it has its own wastewater treatment plant, the waste absorbent liquid may be periodically transferred to the wastewater treatment plant for treatment, but there is a disadvantage in that water and wastewater treatment costs increase due to a short replacement cycle. .

In addition, when there is no wastewater treatment plant, the contractor pays the fee to a specialized company, and in general, it is used for a long time by extending the use period of the absorbent liquid to 3 to 6 months for cost reduction.

As a result, the removal efficiency of dust and gaseous pollutants is not only reduced, but there is a problem that complaints of local residents increase due to odor.

The present invention has been invented in view of the above, by removing the dust and gaseous contaminants by recycling the absorbing liquid containing dust and gaseous contaminants in the flushing prevention facility through the dust removal device and gaseous contaminant removal device, It is possible to reduce the cost of treating waste absorbent liquid by extending the use period of absorbent liquid, to improve the efficiency of removing dust and gaseous pollutants, and to provide absorbent recycling equipment to minimize complaints of local residents due to bad smell. The purpose is.

The present invention to recycle the contaminated absorbent liquid in the flush prevention facility,

The contaminated absorbent liquid stored in the chamber of the flush prevention facility is transferred to the dust removing device, and the sludge is formed by condensation of dust, suspended particles, and organic matter contained in the absorbent liquid by the coagulant, and the sludge is formed in the mixing chamber. Injured sludge is stored in the sludge storage tank by the skimmer, and the first treated water from which the dust is removed is discharged from the dust removing device, and the first treated water is transferred to the gaseous pollutant removing device. The gaseous contaminants contained in the primary treatment water are directly decomposed by radicals generated on the electrode surface of the electrolysis device, and indirectly by the activated chlorine generated by the redox reaction of the electrode with the injected sodium chloride. As oxidized, the secondary treated water from which the gaseous contaminants have been removed is discharged from the gaseous contaminant removal device and washed again. It provides an absorbent recycling system, which can be recycled to the absorbing solution of prevention facilities.

The advantages of the absorbent liquid recycling apparatus according to the present invention are as follows.

1. The contaminated absorbent liquid is transferred to the dust removing device, and the fine sludge is floated by fine bubbles to obtain the primary treated water from which the dust is removed, and the primary treated water is transferred to the gaseous pollutant removing device. Circulated between the electrolysis devices, the second treatment water from which the gaseous contaminants contained in the first treatment water is removed can be recycled as supplementary water in a flushing prevention facility.

2. As the contaminated absorbent is recycled through the dust removal device and the gaseous pollutant removal device, the dust and gaseous contaminants are removed and recycled, thereby extending the service life of the absorbent solution and reducing the cost of the waste absorbed liquid treatment.

3. By periodically removing the dust and gaseous contaminants contained in the contaminated absorbent liquid, it is possible to improve the efficiency of removing the dust and gaseous contaminants in the absorbent liquid in the flushing prevention facility. Can be reduced.

1 is a cross-sectional view showing the configuration of a conventional flushing prevention facility
Figure 2 is a block diagram showing an absorbent liquid recycling apparatus according to an embodiment of the present invention
3 is a cross-sectional view showing a dust removal device in FIG.
4 is a cross-sectional view showing the mixing chamber in FIG.
5 is a cross-sectional view showing a gaseous pollutant removal device in FIG.

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

Absorbent liquid recycling apparatus according to the present invention is composed of a dust removal device 100 for removing the dust contained in the absorbent liquid, and a gaseous pollutant removal device 200 for removing the gaseous pollutants contained in the absorbent liquid.

The dust removal device 100 is composed of a reaction tank 110, a sludge storage tank 114, a skimmer, a micro bubble generator 160, a chemical injection device.

The reaction tank 110 is composed of a chemical mixing tank 111, microbubble mixing tank 112 and flotation separation tank 113, the chemical mixing tank 111, microbubble mixing tank 112 and flotation separation tank 113 may be partitioned by two first and second partitions 121 and 122 in the reaction tank 110, and the absorbent liquid of the chemical mixing tank 111 through a first connection passage formed in the first partition wall 121. The absorbent liquid of the microbubble mixing tank 112 may be introduced into the microbubble mixing tank 112 and through the second connection passage formed in the second partition wall 122 formed in the second partition wall 122. 113).

An absorbent liquid inlet 110a is formed at an upper end of the chemical mixing tank 111, and the absorbent liquid stored in the chamber of the scrubber, which is a flushing prevention facility, through the absorbent liquid inlet 110a is a chemical mixing tank of the dust removal device 100 ( 111) flows inside.

As the absorbent liquid flows into the chemical mixing tank 111 of the dust removing device 100, a coagulant is introduced by the chemical injection device, and the dust, suspended matter, organic matter, etc. contained in the absorbent liquid are coagulated and aggregated by the coagulant. .

As the coagulant, a general water treatment coagulant including aluminum chlorohydrate [(Al ₂ (OH) ₅ Cl) _x ] as a main component may be used, and the coagulant coagulates dust, suspended matter, organic matter, and the like in the absorbent liquid.

Dust, suspended matter, and organic matter condensed in the chemical mixing tank 111 flows into the micro bubble mixing tank 112 through the first connection passage formed in the first partition wall 121, and the micro bubble mixing tank 112. The dust and the like introduced into the floating separation tank 113 through the second connection passage formed in the second partition 122.

In this case, the first connection passage is formed on the upper end of the first partition wall 121 to guide the dust condensed in the chemical mixing tank 111 to flow into the micro-bubble mixing tank 112, the second connection passage It is formed at the lower end of the second partition wall 122 to guide the dust and the like introduced into the microbubble mixing tank 112 flows to the flotation separation tank (113).

The dust introduced into the flotation tank 113 through the second connection passage is floated on the water surface by the microbubbles, and is stored in the sludge storage tank 114 by the skimmer. The gaseous contaminant removing apparatus 200 is moved.

The primary treatment water outlet 110b is formed at one lower end of the flotation separation tank 113, and the primary treated water from which dust is removed is discharged through the outlet 110b and transferred to the gaseous pollutant removal device 200. do.

The skimmer is a device for transporting and removing the injured dust and the like to the sludge storage tank 114 while moving on the surface of the absorbent liquid of the flotation tank 113, and may be selected without particular limitation in the form if known to those skilled in the art. have.

The sludge storage tank 114 is installed on one side upper end of the flotation separation tank 113, and stores the sludge-type dust and the like transported by the skimmer.

The microbubble is generated by the microbubble generating device 160 and supplied to the bottom of the flotation tank 113, and "the sum of all types of energy on the streamline for the flowing fluid is always constant." Generated by the Bernoulli principle.

The microbubble generating device 160 is composed of a recirculation pump 130, a mixing chamber 140, a pressure gauge, an air inlet and a nozzle 143.

The recirculation pump 130 is connected to an auxiliary outlet formed at one lower end of the flotation separation tank 113, and finely recycles a portion of the primary treated water from which dust is removed in the flotation separation vessel 113 through a recirculation line. Recycle to generate bubbles.

The recirculation line includes a first recirculation line 131a connecting the auxiliary discharge port of the flotation tank 113 and the recirculation pump 130, and a second recirculation line connecting the recirculation pump 130 and the mixing chamber 140 ( 131b), and an air supply line 133 is connected to the second recirculation line 131b to receive air from the air supply source 132, and the air is introduced into the mixing chamber 140 together with the primary treated water.

The mixing water inlet 141 is formed at an upper end of the mixing chamber 140, and the primary treated water and air are introduced into the mixing chamber 140 through the mixing water inlet 141. The internal pressure is changed, and the first treated water and the air introduced into the mixing chamber 140 are pressurized to form a mixed solution in which the air is dissolved in the first treated water in a supersaturated state.

At this time, a pressure gauge is installed in the mixing chamber 140 to check the pressure inside the mixing chamber 140 through the pressure gauge.

The nozzle 143 is formed in the spiral direction in the mixing chamber 140, and the flow rate is increased and the pressure is lowered in the course of passing the mixed liquid along the nozzle 143, thereby generating fine bubbles.

A microbubble water outlet 142 is formed at the lower end of the mixing chamber 140, and a check valve is installed at the microbubble water outlet 142 side to prevent a backflow phenomenon, and the microbubble water is discharged through the outlet 142. The microbubble is supplied to the lower end of the flotation tank 113.

The microbubble generating jacket 150 is installed at the lower end of the flotation separation tank 113, and the microbubble supply line 134 is provided between the microbubble generating jacket 150 and the outlet 142 of the mixing chamber 140. Connected, the micro-bubbles generated in the mixing chamber 140 is transmitted through the micro-bubble supply line 134, the micro-bubbles of 30 ~ 80㎛ through the micro-pores formed in the micro-bubble generating jacket 150 float separation tank It is supplied to the bottom of 113.

Here, the surface of the microbubbles discharged through the microbubble generating jacket 150 has a negative charge in the absorbent liquid (Zeta potential), and the surface of the particles such as dust contained in the absorbent liquid is positively charged, thereby causing the electrostatic force between particles. The negatively charged microbubbles are attached to the surface of particles such as positively charged dust, and particles such as dust float on the surface of the floating separator 113 by the buoyancy force of the microbubbles in the absorbent liquid.

The behavior of the microbubbles in the absorbent liquid (wastewater) follows the Stoke's law, and the path is changed by colliding with the floating particles such as dust in the wastewater due to the slow floating speed of the bubbles according to the Stoke's law. The contact time of the bubbles is increased, and the adhesion efficiency and buoyancy of the micro bubbles are increased due to the increase in the surface area of the bubbles.

Therefore, by the above method, it is possible to maximize the removal efficiency of dust and the like using fine bubbles, and to reduce the power consumption during the secondary treatment using electrolysis by treating the dust and the like contained in the contaminated absorbent liquid first. .

The gaseous pollutant removal device 200 includes first and second collection tanks 210a and 210b and an electrolysis device 220, and two first and second collection tanks 210a and 210b are alternately operated. The gaseous contaminants are removed by electrolysis in the first water collecting tank 210a of the two water collecting tanks 210, and in the other second water collecting tank 210b of the water collecting tanks 210 in the secondary treated water where electrolysis is completed. After removing the Cl ₂ contained, the secondary treated water from which chlorine is removed is discharged through the secondary treated water outlet formed at the bottom of the sump 210 to be used as supplementary water in a flush prevention facility.

The first treatment water inlet is formed at the upper end of one side of the sump 210, the primary treatment water is introduced from the dust removal device 100 through the first treatment water inlet, the sump 210 and the electrolysis device 220 First and second circulation lines 213 and 214 are connected therebetween, and a circulation pump 212 is installed in the second circulation line 214, and the primary treatment flowed into the collection tank 210 by the circulation pump 212. The water is moved to the electrolysis device 220 through the first circulation line 213, and the primary treated water introduced into the electrolysis device 220 through the second circulation line 214 is moved back to the water collecting tank 210. The first treated water circulates through the electrolysis device 220 and the sump 210 through the first and second circulation lines 214, and the gaseous contaminants contained in the first treated water are electrolyzed.

An electrode 221 (for example, the anode is DSA and the cathode is SUS 304) is mounted inside the electrolysis device 220 to react the OH radical ((-) electrode generated on the surface of the electrode 221. : 2H ₂ O + 2e-→ 2OH? + H ₂ ) The gaseous pollutants contained in the primary treatment water is directly oxidized, where the reaction formula is as follows, the rectifier 223 is electrically connected to the electrode 221 Connected to rectify the external AC power to a DC power source to apply power to each electrode 221.

Scheme 1

Further, the water tank 210 is sodium chloride is injected from the sodium chloride injector, the active chlorine generated by the oxidation-reduction reaction of the sodium chloride and the electrode ^{(221) (HOCl, OCl -} , ClO 2 -, Cl 2) is indirectly gaseous pollutants Oxidation, redox reaction of sodium chloride and the electrode 221 is as follows.

Scheme 2

The primary treated water stored in the sump 210 is agitated by the aeration device so that the concentration of the gaseous pollutants contained in the primary treated water is equalized, and the aeration device includes an air supply 201 and an diffuser 202. do.

The air supply 201 uses a general air supply device or compressed air of a factory, the diffuser 202 is installed at the bottom of the sump 210, and the air supply line is the diffuser 202 and the air supply 201. ) Is connected, air is supplied through the air supply line, and the air is discharged through the diffuser 202 in which the diffusion hole is formed and supplied to the primary treated water stored in the sump 210.

Air discharged through the diffuser 202 acts to stir the primary treated water while floating in the primary treated water to equalize the concentration of gaseous contaminants contained in the primary treated water.

The roof 211 is formed at the upper end of the sump 210 so that the air floated in the primary treated water is collected through the roof 211, and the collected air is discharged through the air outlet formed at the top of the roof 211. The first and third air circulation lines 230 and 232 are re-introduced into the water collecting tank 210 to be utilized.

The first air circulation line 230 connects the air discharge ports of the first and second collection tanks 210a and 210b, respectively, and the third air circulation line 232 is connected to the first and second collection tanks 210a and 210b. The air inlets are connected to each other, and the second air circulation line 231 connects the first and third air circulation lines 230 and 232, and selectively recycles air to the first and second collection tanks 210a and 210b. A first valve 233 is installed in the first air circulation line 230 to induce air from the first air circulation line 230 to the second air circulation line 231, and to the third air circulation line 232. A second valve is installed to induce air from the second air circulation line 231 to the third air circulation line 232.

HClO may be generated using Cl ₂ contained in the air recycled through the first to third air circulation lines 230, 231, and 232 to reduce the amount of sodium chloride injected into the electrolysis device 220.

Referring to the flow path of the absorbent liquid and the method of removing the dust and gaseous contaminants in the absorbent liquid recycling apparatus for flushing prevention facilities according to an embodiment of the present invention by such a configuration as follows.

The absorbent liquid stored in the lower portion of the chamber of the flush prevention facility absorbs dust, suspended matter and organic matter from the contaminated air, and the absorbent liquid stored in the chamber is moved to the chemical mixing tank 111 of the dust removing apparatus 100.

After the absorbent liquid flows into the chemical mixing tank 111, the dust and the like contained in the absorbent liquid are condensed by the coagulant added to the chemical mixing tank 111 to form sludge. The microbubble mixing tank 112 is introduced through the connection passage, and the absorbent liquid introduced into the microbubble mixing tank 112 is introduced into the floating separation tank 113 through the second connection passage.

Some of the absorbent liquid introduced into the flotation tank 113 is transferred to the mixing chamber 140 through the first and second recirculation lines 131a and 131b by the recirculation pump 130 and the air supply line 133. Air is joined to the second recirculation line (131b) by the air and the absorbing liquid is passed along the nozzle 143 in the mixing chamber 140 together with the flow velocity is faster and the pressure is lowered to generate the microbubble.

The microbubbles generated in the mixing chamber 140 are transferred to the microbubble generating jacket 150 through the microbubble supply line 134, and the microbubbles are floated through the microbubble generating jacket 150. Is supplied into the absorbent liquid.

As the negative charge is charged on the surface of the microbubbles discharged through the microbubble generating jacket 150, and the surface of the particles such as dust in the absorbent liquid introduced into the flotation tank 113 through the second connection passage is charged with a positive charge. The microbubbles are attached to the surface of the particles such as dust by the electrostatic force, the sludge composed of particles such as dust is floated by the buoyancy of the microbubbles, the injured sludge is sludge storage 114 by the skimmer 115 Transferred to and removed.

Then, the first treated water from which the sludge such as dust is removed is transferred to a gaseous pollutant removal device.

The primary treated water is introduced through the primary treated water inlet of the sump 210, moved to the electrolysis device 220 through the first circulation line 213, and then gaseous pollutants contained in the primary treated water. Is directly oxidized by radicals generated on the surface of the electrode 221 of the electrolysis device 220, and indirectly by active chlorine generated by redox reaction between the sodium chloride injected into the electrolysis device 220 and the electrode 221. After oxidation, the primary treatment water is moved from the electrolysis device 220 to the collection tank 210 by the circulation pump 212 through the second circulation line 214.

The primary treated water is circulated through the electrolysis device 220 and the collecting tank 210 through the first and second circulation lines 213 and 214, and the gaseous contaminants that are not oxidized in the collecting tank 210 are completely removed by electrolysis. It is repeatedly decomposed in the electrolysis device 220 until it is.

The air supplier 201 supplies air to the diffuser 202 installed at the lower end of the sump tank 210 through an air supply line, and the air is discharged through the micropores of the diffuser 202, so that the sump 210 Uniform distribution of gaseous contaminants and uniform concentration of gaseous contaminants.

After the air passes through the primary treatment water in the sump 210, the air is collected through the roof 211 of the sump 210, and the air collected in the roof 211 is discharged through the air outlet to form the first air. Transferred through the circulation line 230, guided to the second air circulation line 231 by the first valve 233, guided to the third air circulation line 232 by the second valve 234, and then , And joined to the air supply line is recycled to the sump (210).

By generating HClO by using chlorine contained in the recycled air, it is possible to reduce the amount of sodium chloride injected into the electrolysis device 220, and by alternately operating the water collecting tank 210 in two, the second treatment water in which the electrolysis is completed. By removing the chlorine contained in it, it can be used as supplementary water in a flushing prevention facility.

Therefore, according to the absorbent liquid recycling apparatus of the present invention, the contaminated absorbent liquid is transferred to the dust removing apparatus 100, and the sludge is formed by condensation of dust, suspended particles, organic matters, etc. contained in the absorbent liquid by the coagulant, and the sludge The first treatment water from which dust is removed as the sludge floated by the microbubble generated in the mixing chamber 140 and the injured sludge is stored in the sludge storage tank 114 by the skimmer 115 is removed. The primary treated water is discharged from the gaseous contaminant removing apparatus 200, and circulates through the electrolytic apparatus 220 and the sump 210, and the gaseous contaminants contained in the primary treated water are electrolyzed. The secondary treatment is directly decomposed by radicals generated on the surface of the electrode 221 of 220 and indirectly oxidized by the injected sodium chloride and active chlorine generated by the redox reaction of the electrode 221 to remove the gaseous contaminants. Is discharged from the gaseous pollutant removal device 200 may be recycled back to the absorbing solution in the flush control facilities.

100: dust removal device 110: reaction tank
110a: absorbent liquid inlet 110b: primary treated water outlet
111: chemical mixing tank 112: micro-bubble mixing tank
113: flotation tank 114: sludge storage tank
115: skimmer 121: the first bulkhead
122: second bulkhead 130: recirculation pump
131a: first recycle line 131b: second recycle line
132: air supply source 133: air supply line
134: fine bubble supply line 140: mixing chamber
141: mixing water inlet 142: outlet
143: nozzle 150: microbubble generating jacket
160: micro bubble generator
200: gaseous pollutant removal device 201: air supply
202: diffuser 210: sump
211 roof 212 circulation pump
213: first circulation line 214: second circulation line
220: electrolysis device 221: electrode
222: sodium chloride injection device 223: rectifier
230: first air circulation line 231: second air circulation line
232: third air circulation line 233: first valve
234: second valve

Claims (5)

In the absorbent liquid recycling apparatus consisting of a dust removal device 100 for receiving the contaminated absorbent liquid to remove the dust contained in the absorbent liquid, and a gaseous pollutant removing device 200 for decomposing and removing the gaseous pollutants contained in the absorbent liquid. In
The dust removing device 100 is a chemical mixing tank 111 in which a contaminated absorbent liquid is introduced and a coagulant is introduced, and dust contained in the absorbent liquid is condensed by the coagulant to form sludge;
A microbubble mixing tank 112 into which the absorbent liquid containing sludge flows from the chemical mixing tank 111 and the microbubbles are mixed with the absorbent liquid;
A floating separation tank 113 in communication with the microbubble mixing tank 112, wherein the microbubbles are attached to the surface of the dust particles so that sludge floats due to buoyancy;
A microbubble generating device (160) for supplying microbubbles to the flotation separator (113); And
A sludge storage tank 114 mounted on one side top of the floating separation tank 113 to store sludge;
Absorbing liquid recycling apparatus comprising a skimmer (115) for transporting the sludge injured in the flotation separation tank 113 to the sludge storage tank (114).
The method of claim 1, wherein the microbubble generating device 160 is installed on the bottom of the floating separation tank 113, the microbubble generating jacket 150 for discharging microbubbles;
An air source 132 for providing air;
Receives air from the air treatment source 132 and a part of the primary treated water from which the sludge is removed from the flotation tank 113, and generates microbubbles through the nozzle 143 inside the microbubble generating jacket 150 Mixing chamber 140 to supply to;
A recirculation line 131 connecting the air supply source 132 and the mixing chamber 140 in the flotation separation tank 113;
Absorbing liquid recycling apparatus, characterized in that it comprises a recirculation pump 130 for recycling a portion of the primary treatment water of the flotation tank 113 to the mixing chamber (140).
According to claim 1, The gaseous pollutant removal apparatus 200 includes a water collecting tank 210 to store the first treated water from which the sludge is removed from the flotation separation tank 113;
An electrolysis device 220 into which primary treatment water flows from the collection tank 210 and oxidizes and decomposes gaseous contaminants contained in the primary treatment water by radicals generated on the surface of the electrode 221;
Absorbing liquid recycling apparatus, characterized in that it comprises a circulation line connecting the collecting tank 210 and the electrolysis device 220 to circulate the primary treatment water 210 and the electrolysis device (220).
The method of claim 3, wherein the gaseous pollutant removal device 200 includes a sodium chloride injector 222 for injecting sodium chloride into the electrolysis device 220, the injected sodium chloride inside the electrolysis device 220 Absorbing liquid recycling apparatus, characterized in that the gaseous contaminants contained in the absorbing liquid is oxidized by the active chlorine generated by the redox reaction with the electrode (221).
The method of claim 3, wherein the gaseous pollutant removal device 200 comprises an air supplier 201 for providing air;
The concentration of the gaseous pollutants contained in the primary treated water is installed on the bottom surface of the water collecting tank 210 and receives air from the air supply 201 to uniformly generate bubbles in the primary treated water of the collecting tank 210. A diffuser 202 to equalize;
A roof 211 formed at an upper portion of the water collecting tank 210 to collect air generated from the water collecting tank 210;
Air circulation lines 230, 231 and 232 connecting the roof 211 and the diffuser 202 to recirculate the air collected from the roof 211 to the diffuser 202;
Absorbing liquid recycling apparatus, characterized in that it comprises a first and second valves (233,234) installed in the air circulation line (230, 231, 232) to guide the circulation direction of the primary treatment water.

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