KR101526280B1 - Hydrogen sulfide treating apparatus using ion catalyst solution - Google Patents

Abstract

The present invention relates to a treatment apparatus of hydrogen sulfide for deoxidation using an iron catalyst solution which can increase regeneration efficiency of an iron catalyst by increasing a probability of reacting the iron catalyst sprayed as microparticles with oxygen. According to the present invention, the treatment apparatus of hydrogen sulfide is configured to comprise: a hydrogen sulfide removing device (100); a filter press (200); an iron catalyst solution storage tank (300) for storing a cleaning solution which is discharged from a cleaning solution tank (110); an iron catalyst solution regeneration device (400) for regenerating a catalytic activation by oxidizing the iron catalyst in the iron catalyst solution with oxygen in the air; an iron catalyst solution transfer pump (500) for supplying the regenerated iron catalyst solution to the hydrogen sulfide removing device (100); a time-constant supply unit (600) for supplying a time constant to the iron catalyst solution regeneration device (400); an iron catalyst solution tank (700) for supplying the iron catalyst solution to the iron catalyst solution regeneration device (400); and a pH regulator tank (800) for supplying a pH regulator to the iron catalyst solution regeneration device (400).

Description

FIELD OF THE INVENTION [0001] The present invention relates to a hydrogen sulfide treatment apparatus for reducing iron sulfide,

In the present invention, an iron catalyst solution is sprayed in order to reuse an iron catalyst of an iron catalyst solution that has been changed from Fe ³⁺ to Fe ²⁺ by reacting with hydrogen sulfide to react with external air rising or falling, The present invention relates to a hydrogen sulfide treatment apparatus for reducing iron using an iron catalyst solution capable of increasing the probability of contact with oxygen to increase the regeneration efficiency of the iron catalyst.

Generally, hydrogen sulfide is a colorless odor-generating gas and acts as one of the substances causing air pollution. Hydrogen sulphide is generated by biological action in large quantity, but with the increase of industrial facilities, a large amount of hydrogen sulfide is generated from various industrial facilities, and the problem of air pollution caused by this is becoming more serious. Such air pollution can reduce the degree of damage according to the structure and operation method of the discharge facility, and therefore, a method for efficiently removing hydrogen sulfide discharged from the industrial facility is desperately needed.

The Klaus process, which is one of the methods for recovering sulfur from high-concentration hydrogen sulfide gas, is difficult to apply because it is explosive when hydrocarbon or combustible gas is introduced, and operation cost is high because it is operated at high temperature and high pressure. Gas is generated.

Another method of removing hydrogen sulfide, liquid phase catalytic oxidation, is to oxidize hydrogen sulfide to solid sulfur by using the solubility and redox reaction of the gas at normal temperature and pressure. Since the catalyst used in the liquid phase catalytic oxidation can be regenerated and circulated by oxygen, there is an advantage that no wastewater and secondary contaminants are generated.

In Patent Document 10-0766125 entitled " Device for removing hydrogen sulfide using liquid catalyst ", an oxygen branching portion is formed inside a liquid catalyst regeneration tank in which a liquid catalyst is stored for regeneration of a reduced liquid catalyst, Thereby bringing the liquid catalyst to be regenerated.

However, since the rate of the liquid catalyst contacting with oxygen is low due to the supply of oxygen as bubbles, the registered patent No. 10-0766125 has a problem that the regeneration efficiency is low and oxygen is excessively consumed.

A problem to be solved by the present invention is to react an iron catalyst solution in an iron catalyst solution which has reacted with hydrogen sulfide and changed from Fe ³⁺ to Fe ²⁺ to react with external air rising or falling by spraying an iron catalyst solution, The present invention provides a hydrogen sulfide treatment apparatus for reducing iron using an iron catalyst solution capable of increasing the probability that a sprayed iron catalyst is in contact with oxygen to increase the regeneration efficiency of the iron catalyst.

Another object of the present invention is to provide a reduction hydrogen sulfide treatment apparatus using an iron catalyst solution capable of maintaining the pH of the iron catalyst solution at a weak acidity and preventing the iron catalyst solution from being acidified even after the hydrogen sulfide reaction and maintaining the catalytic activity There is.

The apparatus for treating hydrogen sulfide using the iron catalyst solution according to the present invention comprises a hydrogen sulfide removal apparatus 100 for removing hydrogen sulfide from a polluted gas by spraying an iron catalyst solution onto a polluted gas containing hydrogen sulfide, An iron catalyst solution storage tank 300 in which the cleaning liquid discharged from the cleaning liquid tank 110 is stored; The iron catalyst solution stored in the iron catalyst solution storage tank 300 is supplied to the upper portion of the inner side while the outer air is supplied to the upper portion and the iron catalyst of the iron catalyst solution is oxidized with oxygen in the air to regenerate the catalytic activity An iron catalyst solution feed pump 500 for feeding the iron catalyst solution regenerated in the iron catalyst solution regeneration device 400 to the hydrogen sulfide removal device 100, A time constant supply unit 600 connected to the iron catalyst solution regeneration unit 400 for supplying the time constant water to the iron catalyst solution regeneration unit 400 and an iron catalyst solution recovery unit 400 for storing the iron catalyst solution, An iron catalyst solution tank 700 for supplying iron catalyst solution to the iron catalyst solution recovery apparatus 400 and a pH adjusting agent connected to the iron catalyst solution storage tank 300, And a pH adjuster tank 800 for supplying the pH adjuster to the iron catalyst solution regenerator 400 so as to be constantly maintained.

Preferably, the hydrogen sulfide removal apparatus 100 includes a cleaning liquid tank 110 separated into a first cleaning tank 111 and a second cleaning tank 112 by a blocking plate 113 extending downward from an upper surface thereof; An odor gas inflow part 120 which is located at one side of the first cleaning tank 111 of the cleaning liquid tank 110 and supplies the hydrogen sulfide-containing contaminant gas from the outside, And the lower end thereof is passed through the upper part of the first washing tub 111 and the iron catalyst solution is sprayed on the contaminant gas flowing into the first washing tub 111 which moves upward through the lower end to react with the hydrogen sulfide A first cleaning part 130 for dropping the cleaning liquid into the first cleaning bath 111 and an upper part connected to the upper end of the first cleaning part 130 while being positioned above the second cleaning bath 112, The first cleaning part 130, which penetrates the upper part of the second washing tank 112 and moves downward through the upper part, is sprayed with the iron catalyst solution to spray the cleaning solution and the cleaned gas. A second cleaning section 140 for dropping the cleaning liquid into the second cleaning tank 112, A characterized in that it comprises a and a gas discharge portion 150 for discharging to the outside, for discharging the cleaning liquid to the cleaning liquid in a cleaning solution collection tank 110 outlet 160.

The iron catalyst solution storage tank 300 is divided into a first storage tank 311 and a second storage tank 312 by a shutoff plate 313 extending upward from the lower surface, The cleaning solution discharged from the cleaning liquid tank 110 is stored in the second storage tank 312 and the regenerated iron catalyst solution is stored in the second storage tank 312 through the iron catalyst solution recovery device 400, And an iron catalyst solution outlet 320 for discharging the catalyst solution.

The iron catalyst solution regeneration apparatus 400 may be constructed such that the iron catalyst solution regeneration apparatus 400 is positioned above the second storage tank 312 of the iron catalyst solution storage tank 300, An air supply port 420 for supplying outside air (or oxygen) to the lower end of the regeneration tower 410, and a regeneration tower 420 disposed inside the regeneration tower 410, A transfer pump 440 for supplying the iron catalyst solution of the iron catalyst solution storage tank 300 to the spray nozzle, and a transfer pump 440 for transferring the introduced external air (or oxygen) A guide vane 450 for blowing air into the regeneration tower 410, and an air outlet 470 for discharging air introduced from the upper end of the regeneration tower 410.

The spray nozzle 430 includes a first spray nozzle 431 at an upper end portion and a second spray nozzle 432 at an intermediate portion in a multistage manner and the first spray pump 431 is connected to the first spray pump 431 The iron catalyst solution of the first reservoir 311 is supplied to the second atomizing nozzle and the iron catalyst solution of the second reservoir 321 is supplied to the second atomizing nozzle by the second transfer pump 442. [

Since the iron sulfide treatment apparatus for reducing iron using the iron catalyst solution according to the present invention reacts with the external air (oxygen) rising or falling while spraying the iron catalyst solution at the regeneration of the iron catalyst solution, There is an effect that it is possible to increase the probability of contact with the iron catalyst and to increase the regeneration efficiency of the iron catalyst.

Further, the pH of the iron catalyst solution to be regenerated is maintained at a weak acidity, thereby preventing the iron catalyst solution from being acidified, and maintaining the catalytic activity.

1 is a schematic view of a hydrogen sulfide treatment apparatus for reduction using an iron catalyst solution according to the present invention.

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Reference will now be made in detail to the present embodiments of the present invention, examples of which are illustrated in the accompanying drawings, wherein like reference numerals refer to the like elements throughout.

The apparatus for treating hydrogen sulfide using an iron catalyst solution according to a preferred embodiment of the present invention includes a hydrogen sulfide removal device 100 for removing hydrogen sulfide from a polluted gas by spraying an iron catalyst solution onto a polluted gas containing hydrogen sulfide, An iron catalyst solution regeneration apparatus 400 for regenerating the iron catalyst solution reacted with hydrogen sulfide, an iron catalyst solution regeneration apparatus 400 for regenerating the iron catalyst solution regenerated in the iron catalyst solution regeneration apparatus 400, And an iron catalyst solution transfer pump 500 for supplying the iron catalyst solution to the hydrogen sulfide removal device 100. The apparatus for treating hydrogen sulfide for reduction comprises a supernatant supply unit 600 for supplying supernatant water, an iron catalyst solution tank 700 for supplementing the iron catalyst solution, and a pH adjusting agent and further comprises a pH adjuster tank 800.

At this time, the iron catalyst solution forms a chelating agent in the trivalent iron oxide and oxidizes the hydrogen sulfide as follows to remove it as solid sulfur.

H ₂ S (g) - > H ₂ S (aq)

H ₂ S (aq) + 2Fe ³⁺ chelaten - ^- & gt ^; 2Fe ²⁺ chelaten- + S + 2H ⁺

And, the reduced iron catalyst is regenerated again by oxygen as follows:

O ₂ (g)? O ₂ (aq)

4Fe ²⁺ chelaten ^- + 2H ₂ O + O ₂ (aq) -> 4Fe ³⁺ chelaten ^- + 4OH ^-

Fe (NO ₃ ) ₃ is preferably used as the iron catalyst of the iron catalyst solution, and 4Na-EDTA or 2Na-EDTA (ethylenediaminetetraacetic acid) is used as the chelate compound. This iron catalyst solution is conventional and a detailed description thereof will be omitted.

The hydrogen sulfide removal apparatus 100 of the present invention includes a cleaning liquid tank 110 separated into a first cleaning tank 111 and a second cleaning tank 112 by a blocking plate 113 extending downward from an upper surface thereof, ; An odor gas inflow part 120 which is located at one side of the first cleaning tank 111 of the cleaning liquid tank 110 and supplies the hydrogen sulfide-containing contaminant gas from the outside, And the lower end thereof is passed through the upper part of the first washing tub 111 and the iron catalyst solution is sprayed on the contaminant gas flowing into the first washing tub 111 which moves upward through the lower end to react with the hydrogen sulfide A first cleaning part 130 for dropping the iron catalyst solution (hereinafter referred to as a cleaning liquid) into the first cleaning bath 111; The iron catalyst solution is sprayed onto the contaminated gas passed through the first washing part 130 connected to the upper end of the second washing tub 130 and passing through the upper part of the second washing tub 112 and moving downward through the upper part A second cleaning unit 140 for dropping the cleaned cleaning liquid and the cleaned gas into the second cleaning tank 112 while cleaning the second cleaning tank 112, The cleaned gas flows into the tank 112 and includes a gas discharge portion 150 for discharging to the outside, the cleaning liquid discharge port 160 for discharging the washing liquid collected in the washing liquid tank (110). At this time, it is preferable that the iron catalyst solution sprayed by the first cleaning part 130 and the second cleaning part 140 is supplied from the iron catalyst solution recovery device 400 described later.

The filter press 200 is connected to the rinse solution outlet 160 of the rinse solution tank 110 and receives the rinse solution discharged from the rinse solution tank 110 to separate the rinse solution into the solid solution and the rinse solution. The separated solid sulfur is supplied to the solid sulfur storage tank 210 and the separated cleaning liquid is supplied to the iron catalyst solution storage tank 300.

The iron catalyst solution storage tank 300 is divided into a first storage tank 311 and a second storage tank 312 by a blocking plate 313 extending upward from the lower surface, The iron catalyst solution stored in the first reservoir 311 and regenerated through the iron catalyst solution regeneration apparatus described later is stored in the second reservoir 312. An iron catalyst solution outlet (330) for discharging the iron catalyst solution is formed on one side of the second reservoir (312).

The iron catalyst solution regeneration apparatus 400 is disposed at an upper portion of the iron catalyst solution storage device, while supplying the outside air to the inner lower portion and moving the iron catalyst solution solution to the upper portion, and supplying the iron catalyst solution stored in the iron catalyst solution storage tank 300 And the iron catalyst of the iron catalyst solution is oxidized with oxygen in the air to regenerate the catalytic activity.

The iron catalyst solution regeneration apparatus 400 is disposed in an upper portion of the second storage tank 312 of the iron catalyst solution storage tank 300 and has a lower end connected to the upper portion of the second storage tank 312, An air supply port 420 for supplying outside air (or oxygen) to the lower end of the regeneration tower 410; a spray nozzle 430 positioned inside the regeneration tower for spraying the iron catalyst solution; A transfer pump 440 for supplying the iron catalyst solution of the iron catalyst solution storage tank 300 to the spray nozzle, a guide vane 450 for blowing the introduced external air (or oxygen) into the swirling flow, And an air outlet 470 for discharging the introduced air at the upper end of the air outlet 470. The spray nozzle 430 includes a first spray nozzle 431 at an upper end and a second spray nozzle 432 at an intermediate portion in a multistage manner and a first transfer pump 441 is connected to the first spray nozzle 431, The iron catalyst solution in the first reservoir 311 is supplied to the second spray nozzle and the iron catalyst solution in the second reservoir 321 is supplied to the second spray nozzle by the second transfer pump 442. [ When the iron catalyst solution stored in the first reservoir 311 is sprayed to the first atomizing nozzle 431, the iron catalyst is regenerated with oxygen and then reduced to the second reservoir 312 And the reduced iron catalyst solution and the unreduced iron catalyst solution stored in the second reservoir 312 are again rinsed with oxygen while being sprayed to the second spray nozzle 432 to reduce the iron catalyst to be reduced So that the regeneration efficiency can be increased.

The iron catalyst solution regenerator 400 may be formed with a perforated plate 460 at a position spaced apart from the spray nozzle 430 by a predetermined distance. At this time, the perforated plate 460 is preferably made of a filter or the like, and is preferably positioned below the guide vane 450. The iron catalyst solution sprayed from the spray nozzle by the spray nozzle is flowed downward along the perforation while wetting the top surface, and the external air (or oxygen) transported from the lower part to the upper part is dispersed along the perforation, Air is divided into smaller fragments, and the contact area with the iron catalyst solution and the contact time are increased, so that the regeneration efficiency can be increased.

The iron catalyst solution transfer pump 500 may be configured such that the iron catalyst solution stored in the iron catalyst solution storage tank 300 is sprayed by the first and second cleaning members 130 and 140 of the hydrogen sulfide removing apparatus 100, Supply.

The supernatant supply unit 600 is connected to the iron catalyst solution storage tank 300 to supply the time constant water to the iron catalyst solution storage tank 300. The supernatant supply unit 600 supplements the time constant lost during the circulation of the iron catalyst solution. At this time, it is preferable that the time-lapse water supplying unit 600 supplies the deficient time-lapse water according to the water level detected through the water level sensor 610 installed in the first reservoir 311.

The iron catalyst solution tank 700 stores the iron catalyst solution and is connected to the iron catalyst solution storage tank 300 to supply the iron catalyst solution to the iron catalyst solution storage tank 300. The iron catalyst solution tank 700 replenishes the iron catalyst solution which is lost during the circulation of the iron catalyst solution, such as solid sulfur being separated and buried in the solid sulfur through the filter press 200. At this time, it is preferable that the iron catalyst solution tank 700 supplies a deficient iron catalyst solution to the second reservoir 321.

The pH adjuster tank 800 stores a pH adjuster and is connected to the iron catalyst solution storage tank 300 to supply the pH adjuster to the iron catalyst solution storage tank 300 so that the pH of the iron catalyst solution is kept constant. At this time, it is preferable that a pH sensor 810 is provided in the iron catalyst solution storage tank 300 so that the iron catalyst solution is maintained at about 8, which is weakly alkaline, according to the information provided from the pH sensor. The pH adjuster tank 800 preferably supplies the insufficient pH adjuster to the second reservoir 321.

Hereinafter, the process of the reducing hydrogen sulfide treatment apparatus using the iron catalyst solution of the present invention will be described in detail.

<Hydrogen Sulfide Removal Process>

The contaminated gas containing hydrogen sulfide supplied into the first washing tub 111 of the washing liquid tank 110 separated into the first washing tub 111 and the second washing tub 112 is introduced into the first washing tub 111 The first cleaner 130 is moved upward along the lower portion of the first cleaner 130 located at the upper portion of the iron catalyst solution storage tank 300 through the iron catalyst solution transfer pump 500, The iron catalyst solution supplied from the atomizer is sprayed. Accordingly, the first cleaning unit 130 reacts the hydrogen sulfide contained in the polluted gas with the iron catalyst contained in the iron catalyst solution to change the iron catalyst from Fe ³⁺ to Fe ²⁺ , and the hydrogen sulfide is converted into solid sulfur and hydrogen ions . The used cleaning liquid and the generated solid sulfur fall into the first cleaning tank 111, and the residual contaminant gas and generated hydrogen ions move to the second cleaning unit 140.

The polluted gas discharged to the upper part of the first washing part 130 flows into the upper part of the second washing part 140 and moves to the lower part. The second washing part 140 is connected to the iron catalyst solution transfer pump 500, the iron catalyst solution supplied from the iron catalyst solution storage tank 300 is sprayed. Accordingly, the second scavenging unit 140 reacts the residual hydrogen sulfide contained in the polluted gas with the iron catalyst contained in the iron catalyst solution to generate solid sulfur and hydrogen ions. The used cleaning liquid, the generated solid sulfur, the residual contaminant gas, and the generated hydrogen ions are moved to the second cleaning tank 112.

The residual contaminant gas introduced into the second washing tank 112 and the generated hydrogen ions are discharged after being purified through the separation gas treatment tank and stored in the first washing tank 111 and the second washing tub 112 The rinsing liquid is provided as a filter press 200 (separated into solid sulfur and rinsing liquid). The separated solid sulfur is supplied to the solid sulfur storage tank 210 and the separated cleaning liquid is supplied to the iron catalyst solution storage tank 300.

&Lt; Iron catalyst solution regeneration process >

The cleaning liquid supplied to the iron catalyst solution storage tank 300 is first supplied to the first storage tank 311 of the iron catalyst solution storage tank 300 separated into the first storage tank 311 and the second storage tank 312.

The cleaning liquid stored in the first reservoir 311 is supplied to the first spray nozzle 431 formed in the regeneration tower 410 located at the upper portion of the second reservoir 312 and flows into the lower end of the regeneration tower 410 while being sprayed And reacts with oxygen contained in air (or oxygen) rising in a swirling flow by the guide vane 450. Accordingly, the iron catalyst contained in the cleaning liquid sprayed from the first spray nozzle 431 changes from Fe ²⁺ to Fe ³⁺ while being reacted with oxygen contained in the rising air, and is regenerated as an iron catalyst solution. The regenerated iron catalyst solution and the untreated rinse solution fall into the second reservoir 312, and the air (oxygen) continues to move to the upper portion of the regeneration tower.

The regenerated iron catalyst solution and the untreated rinse solution stored in the second reservoir 312 are supplied to the second atomizing nozzle 432 located at the upper portion of the regeneration tower and reacted with rising air while being sprayed. Accordingly, the microcrystalline iron catalyst contained in the iron catalyst solution sprayed from the second spray nozzle 432 is changed from Fe ²⁺ to Fe ³⁺ while being reacted with oxygen contained in the air, and is regenerated as an iron catalyst solution. The regenerated iron catalyst solution falls into the second storage tank 312, and the rising air is discharged to the outside through the air outlet 470 located at the upper end of the regeneration tower.

On the other hand, when the perforated plate 460 is formed under the guide vane 450, the iron catalyst solution sprayed from the first and second spray nozzles 431 and 432 flows along the perforations of the perforated plate 460, (Or oxygen) rising outside, thereby making it possible to increase the regeneration efficiency.

The regenerated iron solvent solution is regenerated by reacting the iron catalyst reacted with hydrogen sulfide repeatedly with oxygen by the iron catalyst solution regeneration apparatus 400 by reacting with the oxygen, and the regenerated iron solvent solution is circulated through the iron catalyst solution transfer pump 500 ).

At this time, when the water level of the iron catalyst solution storage tank 300 is less than a certain level, the time constant water stored in the time-water supply unit 600 is supplied and the iron catalyst solution stored in the iron catalyst solution tank 700 is supplied. Then, the pH adjusting agent is supplied so that the pH of the iron catalyst solution storage tank 300 is maintained at about 8, which is a weak alkaline state.

While the present invention has been particularly shown and described with reference to exemplary embodiments thereof, it is to be understood that the invention is not limited to the disclosed exemplary embodiments. It is to be understood that within the scope of the appended claims, various changes and modifications may be made.

100: hydrogen sulfide removal device 110: cleaning liquid tank
120: odor gas inflow part 130: first taxation part
140: second-tier government 150: gas outlet
160: Cleaning liquid outlet
200: Filter press 210: Solid sulfur storage tank
300: iron catalyst solution storage tank 311: first storage tank
312: second reservoir 320: iron catalyst solution outlet
400: iron catalyst solution regenerator 410: regenerator
420: Air supply port 430: Spray nozzle
440: Feed pump 450: Guide vane
470: air outlet
500: Iron catalyst solution transfer pump 600: Time constant water supply part
700: Iron catalyst solution tank 800: pH adjuster tank

Claims (6)

A hydrogen sulfide removal device (100) for removing hydrogen sulfide from a polluted gas by spraying an iron catalyst solution on the polluted gas containing hydrogen sulfide,
A filter press 200 for separating the solid sulfur contained in the iron catalyst solution,
An iron catalyst solution storage tank 300 in which the cleaning liquid discharged from the cleaning liquid tank 110 is stored,
The iron catalyst solution is stored in the iron catalyst solution storage tank 300 while being supplied to the inside of the iron catalyst solution storage tank 300. The iron catalyst solution stored in the iron catalyst solution storage tank 300 is sprayed to the inside of the iron catalyst solution solution storage tank 300, An iron catalyst solution recovery device 400 for recovering the catalytic activity by oxidizing the iron catalyst of the iron catalyst with oxygen in the air,
An iron catalyst solution transfer pump 500 for supplying the iron catalyst solution regenerated in the iron catalyst solution regeneration apparatus 400 to the hydrogen sulfide removal apparatus 100,
A time constant supply unit 600 connected to the iron catalyst solution storage tank 300 for supplying a time constant water to the iron catalyst solution storage tank 300,
An iron catalyst solution tank 700 in which an iron catalyst solution is stored and connected to the iron catalyst solution storage tank 300 to supply the iron catalyst solution to the iron catalyst solution storage tank 300,
and a pH adjuster tank 800 connected to the iron catalyst solution storage tank 300 to supply the pH adjuster to the iron catalyst solution storage tank 300 so that the pH of the iron catalyst solution is kept constant Wherein the iron sulfide solution is used as a reducing agent. The hydrogen sulfide removal apparatus 100 according to claim 1, wherein the hydrogen sulfide removal apparatus 100 comprises a cleaning liquid tank 110 separated into a first cleaning tank 111 and a second cleaning tank 112 by a blocking plate 113 extending downward from an upper surface, ;
A malodorous gas inflow section 120 located at one side of the first cleaning tank 111 of the cleaning liquid tank 110 and supplying the hydrogen sulfide-containing contaminant gas from the outside,
The lower end of the washing tub 110 is positioned above the first washing tub 111 of the washing liquid tank 110 and the lower end of the washing tub 110 passes through the upper portion of the first washing tub 111, A first cleaning part 130 for spraying the iron catalyst solution to the gas to cause the cleaning solution reacted with the hydrogen sulfide to fall into the first cleaning bath 111,
The upper part of the second washing tub 112 is connected to the upper end of the first washing unit 130 and the lower end of the second washing tub 112 is passed through the upper part of the second washing tub 112, A second cleaning unit 140 for spraying the iron catalyst solution to the contaminated gas passed through the first washing unit 130 to drop the washed washing liquid and the cleaned gas into the second washing tub 112,
A gas discharge unit 150 for discharging the cleaning gas introduced into the second washing tank 112 to the outside,
And a cleaning liquid discharge port (160) for discharging the cleaning liquid collected in the cleaning liquid tank (110). The iron catalyst solution storage tank 300 according to claim 1, wherein the iron catalyst solution storage tank 300 is separated into a first storage tank 311 and a second storage tank 312 by a blocking plate 313 extending upward from a lower surface thereof, 311 are stored with the cleaning liquid discharged from the cleaning liquid tank 110 and the recovered iron catalyst solution is stored in the second storage tank 312 through the iron catalyst solution recovery device 400. In the second storage tank 312, Wherein an iron catalyst solution outlet (320) for discharging the iron catalyst solution is formed. The iron catalyst solution recovery apparatus 400 according to claim 3, wherein the iron catalyst solution recovery apparatus 400 is located above the second storage tank 312 of the iron catalyst solution storage tank 300 while the lower end thereof passes through the upper portion of the second storage tank 312, A regeneration tower 410 having an outlet formed therein,
An air supply port 420 for supplying outside air (or oxygen) to the lower end of the regeneration tower 410,
A spray nozzle 430 located inside the regeneration tower for spraying the iron catalyst solution,
A transfer pump 440 for supplying the iron catalyst solution of the iron catalyst solution storage tank 300 to the spray nozzle,
A guide vane 450 for blowing the introduced outside air (or oxygen) into a swirling flow,
And an air outlet (470) for discharging the air introduced from the upper end of the regenerator (410). The first atomizing nozzle 431 is composed of a first atomizing nozzle 431 at the upper end and a second atomizing nozzle 432 at the middle portion in a multistage manner, The iron catalyst solution of the first reservoir 311 is supplied by the first reservoir tank 441 and the iron catalyst solution of the second reservoir 321 is supplied to the second spray nozzle by the second transfer pump 442 A hydrogen sulfide treatment apparatus for reduction using an iron catalyst solution. The apparatus for treating hydrogen sulfide using iron catalyst solution according to claim 4 or 5, wherein the iron catalyst solution regeneration apparatus (400) is provided with a perforated plate (460) at a position spaced apart from the spray nozzle (430) by a predetermined distance.

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