KR102018109B1 - Module type Scrubber for odor removal - Google Patents

Abstract

The present invention is a first tank for storing an electrolytic solution containing an electrolysis bath, the electrolytic solution containing hydroxide ions (OH-) and sodium hypochlorite (NaOCl) while being connected to the electrolysis tank, one side is connected to the first tank And a first intake port provided on the lower outer circumferential surface of the first reaction tank, a first exhaust port provided on the upper surface of the first reaction tank, and connected to the first water tank, and installed in the first reaction tank and stored in the first water tank. A first deodorization module comprising at least one first injection nozzle for injecting the electrolytic solution is disposed on the side of the first tank, the second tank having a space independent of the first tank and stores sodium hydroxide, one side A second intake port connected to the second water tank, a second intake port provided on a lower outer peripheral surface of the second reaction tank and connected to the first exhaust port, and an upper surface of the second reaction tank; A second deodorization module connected to the second exhaust port, the second water tank, including at least one second injection nozzle which is installed inside the second reaction tank and sprays sodium hydroxide (NaOH) stored in the second water tank. And a third tank disposed at the side of the second tank, the third tank having a space independent of the second tank, storing hydrogen peroxide water (H ₂ O ₂ ) and sodium bicarbonate (NaHCO ₃ ), one side of which is connected to the third tank. A third reactor, a third intake port provided at a lower outer circumferential surface of the third reactor and connected to the second exhaust port, a third exhaust port provided at an upper surface of the third reactor, and connected to the third water tank; containing; as installed in the third deodorization module, including at least one third spray nozzle for spraying hydrogen peroxide solution (H ₂ O ₂₎ and sodium bicarbonate (NaHCO ₃₎ are stored in the third water tank It provides a modular odor scrubber, characterized by.

Description

Modular type scrubber for odor removal

The present invention relates to an apparatus for removing malodors, and more particularly, to a scrubber for chemically removing malodorous gases during an industrial process in which malodorous gases are generated.

In general, deodorization methods for removing odors include gas absorption, direct combustion, catalytic oxidation, ozone oxidation, adsorption by adsorbents or ion exchange methods, and electrode methods using electrostatic precipitators. In many cases, dust removal, dehumidification, water washing, etc. may be required as pretreatment.

In particular, the gas absorption method is to change the odorous substances contained in the exhaust gas from the gas state to the liquid state, and is a method of removing the odorous substances by absorbing the gaseous odorous substances into the liquid absorbent.

At this time, when selecting the absorbent should be selected in consideration of the solubility, volatility, viscosity, chemical stability and flammability of the pollutant to be removed.

The gas absorption method can be divided into a liquid dispersion method which is a method of injecting the absorbent liquid into the exhaust gas according to an operation method and a gas dispersion method which blows the exhaust gas into the absorbent liquid.

In particular, when the liquid dispersion method is applied, the odorous substances may be removed by using an acid and an alkaline chemical liquid that chemically treats the exhaust gas containing the odorous substances.

In general, the occurrence of malodors appears as a complex property, and the malodorous substances are acidic, basic, and neutral. More specifically, malodorous substances include acidic sulfur compounds, organic acids, basic nitrogen compounds, and neutral other malodorous substances. Can be distinguished.

Therefore, in the removal of odorous substances using acid and alkaline chemicals, alkaline odorous substances are removed with an acidic deodorant solution, and acidic odorous substances are removed with a basic deodorant solution.

In particular, when removing odorous substances using the above-described method, a scrubber is used and a scrubber in the form of a tower is generally used as shown in FIG. 1, which shows a device according to the prior art.

In addition, the conventional scrubber includes a gas inlet (1), the injection port (2), the water tank (3), the exhaust port (4), the exhaust gas containing odorous substances introduced into the scrubber body through the gas inlet (1) Is treated due to the deodorizing solution injected from the injection port (2), the remaining deodorizing solution is collected back to the water tank (3), and finally has a structure in which the gas from which the odorous substance has been removed through the exhaust port (4).

In addition, the scrubber in the form of a general tower has a limitation in removing a complex exhaust gas containing all of the acid, basic, neutral odorous substances because the tank 4 for storing the deodorizing solution is not divided.

In order to solve this problem, a high-efficiency multi-clean dust collector of Korean Patent Application No. 10-2006-0051680 (filed June 9, 2006) filed with the Korean Patent Office is disclosed, but acid, basic and neutral odorous substances are uniformly included. If the exhaust gas is not treated continuously, the part treating different odorous substances is integrated in the form of tower, which is unnecessary when performing the maintenance and repair work of the reaction tank in which the exhaust gas containing the odorous substance is dissolved in the solution and treated. There was a problem that needs to be done at once.

The problem to be solved by the present invention is to solve the above problems in view of the above, and to maintain the scrubber when treating a complex exhaust gas containing acidic, basic, neutral odorous substances and An object of the present invention is to provide a modular odor removal scrubber that can be easily maintained and repaired only when necessary.

Modular odor removal scrubber of the present invention is a first tank for storing an electrolytic aqueous solution containing an electrolysis tank, the hydroxide ions (OH-) and sodium hypochlorite (NaOCl) while being connected with the electrolysis tank, one side is A first reactor connected to a first tank, a first intake port provided on a lower outer circumferential surface of the first reactor, a first exhaust port provided on an upper surface of the first reactor, and connected to the first tank, inside the first reactor A first deodorization module including at least one first injection nozzle for injecting an electrolytic solution stored in the first tank and disposed on a side of the first tank, the space being independent of the first tank and having sodium hydroxide; The second tank for storing the second, one side is connected to the first exhaust port while the second reactor is connected to the second tank, the lower peripheral surface of the second reactor At least one connected to the second intake port, the second exhaust port provided on the upper surface of the second reactor, the second tank, the sodium hydroxide (NaOH) stored in the second tank while being installed inside the second reactor The second deodorization module including the second injection nozzle and the second disposed on the side of the second tank, having a space independent of the second tank and stores the hydrogen peroxide (H ₂ O ₂ ) and sodium bicarbonate (NaHCO ₃ ) A third tank, one side of the third reactor connected to the third tank, a third inlet provided on the lower outer peripheral surface of the third reactor and connected to the second exhaust port, a third exhaust port provided on the upper surface of the third reactor , doedoe connected to the third tank, the at least one to as installed in the reaction vessel 3 to spray aqueous hydrogen peroxide (H ₂ O ₂₎ and sodium bicarbonate (NaHCO ₃₎ are stored in the third water tank third branch Sano Characterized in that it comprises; third deodorization module, including a module containing a deodorizing 3.

In addition, the first deodorizing module is characterized in that it comprises the progress of the reaction that the ammonia (NH ₃ ) and complex odorous substances are oxidized and removed.

Finally, the electrolysis tank is characterized in that to produce an electrolytic aqueous solution containing hydroxide ions (OH-) and sodium hypochlorite (NaOCl) to supply to the first tank.

The present invention can be configured so that the components of the plurality of deodorizing modules are compatible and can be easily replaced when the maintenance and repair of the scrubber is required by dividing and modularizing the reaction tank for treating malodorous substances of different properties, and serious contamination The deodorizing module can be easily separated and immediately maintained and repaired, thereby providing an effect of finally increasing the efficiency of removing odorous substances from the scrubber.

1 is a cross-sectional view of a scrubber according to the prior art.
Figure 2 is a block diagram illustrating a process for removing malodorous substances using the modular malodor removing scrubber of the present invention.
Figure 3 is an exemplary view showing a modular malodor removing scrubber of the present invention.

Hereinafter, the technical spirit of the present invention will be described in more detail with reference to the accompanying drawings.

In addition, the accompanying drawings are only examples illustrated to more specifically describe the technical idea of the present invention, and thus the technical idea of the present invention is not limited to the accompanying drawings.

2 is a block diagram illustrating a process of removing odorous substances in exhaust gas using the modular malodor removing scrubber of the present invention, and the process of removing odorous substances will be described with reference to this.

First, the removal of ammonia (NH ₃ ) and the complex odorous substance occurs in the first deodorization module 100, the odorous substances in the exhaust gas directly or indirectly by the electrolysis tank 110 connected to the first water tank 120. Removed.

Next, in the second deodorization module 200, it is possible to remove the remaining acidic odorous substances that are not removed by the first deodorization module and the electrolysis tank 110, and the odor in the first deodorization module 100. Allows the removal of chlorine (Cl ₂ ), which may be generated during material removal.

Finally, in the third deodorization module 300, to remove the residual odorous substances that could not be removed in the first deodorization module 100 and the second deodorization module 200, at this time, hydrogen peroxide (H ₂ O ₂ ) And sodium bicarbonate (NaHCO ₃ ) to remove the residual odorous substance.

Next, Figure 3 is an exemplary view showing a modular malodor removing scrubber of the present invention, with reference to this will be described in more detail the modular malodor removing scrubber and odor substance removal reaction.

The modular odor removal scrubber includes a first deodorization module 100, an electrolysis tank 110, a second deodorization module 200, and a third deodorization module 300.

First, the first deodorization module 100 may remove ammonia (NH ₃ ) and complex odorous substances contained in the exhaust gas through the electrolytic solution, and the first deodorization module 100 may be connected to the first water tank 120. The first reactor 130 is included.

In particular, the tubular first reactor 130 is connected to one side of the first tank 120, the other side is exposed to the outside.

At this time, the first intake port 131 is formed so that the exhaust gas containing the malodorous substance flows into the lower surface of the portion where the first reactor 130 is exposed to the outside.

In addition, at least one first spray nozzle 132 is installed in the first reactor 130 to be connected to the first tank 120 to inject an electrolytic solution stored in the first tank 120. The discharge port direction of the first injection nozzle 132 may be disposed to face a space in which the exhaust gas containing ammonia (NH ₃ ) and the complex odorous substance stays inside the first reaction tank 130.

At this time, the electrolytic aqueous solution contains sodium hypochlorite (NaOCl), the sodium hypochlorite (NaOCl) by the electrolysis tank 110 is connected to the first water tank 120 included in the first deodorization module 100 Is generated.

In addition, in the electrolysis tank 110, ammonia (NH ₃ ) may be directly oxidized and removed by hydroxide ions (OH-), as shown in Scheme 1 below, which is applied to the electrolytic aqueous solution injected from the first injection nozzle 132. This reaction removes some of the dissolved ammonia (NH ₃ ).

Scheme 1

NH ₃ + 3OH ^- → 0.5N ₂ + 3H ₂ O + 3e-

In addition, the ammonia (NH ₃ ) in the exhaust gas reacts with the electrolyte solution injected through the first injection nozzle 132 and the exhaust gas introduced through the first inlet 131 in the first solution reaction unit 133. The complex odor substance is removed, including the reaction of removing ammonia (NH ₃ ) by indirect oxidation using sodium hypochlorite (NaOCl) as shown in Scheme 2 below.

Scheme 2

2NH ₃ + 3NaOCl → N ₂ + + 3NaCl + 3H ₂ O

In addition, the reaction of removing complex odorous substances by the sodium hypochlorite (NaOCl) also proceeds as in the following [Scheme 3].

Scheme 3

(CH ₃ ) ₃ N + NaOCl → (CH ₃ ) ₃ NO + NaCl

H ₂ S + ₄ NaOCl → Na ₂ SO ₄ + 4NaCl

2CH ₃ SH + 6NaOCl → 2CH ₃ SO ₃ + 6NaCl + H ₂ ↑

(CH ₃ ) ₂ S + ₃ NaOCl → (CH ₃ ) ₂ SO ₃ + 3NaCl

(CH ₃ ) ₂ S ₂ + 2NaOCl → (CH ₃ ) ₂ S ₂ O ₂ + 2NaCl

CH ₃ CHO + NaOCl → CH ₃ COOH + NaCl

In addition, the first solution reaction part 133 is filled with a large porosity and a specific surface area in order to increase the reaction efficiency of the electrolyte solution and ammonia (NH ₃ ) in the exhaust gas and the complex odorous substance in the first solution reaction part 133. Can be filled.

In addition, the first solution removing unit 134 is for removing the electrolytic solution contained in the gas reacted with the electrolytic solution in the first solution reaction unit 133, and if not removed, the second deodorization module to be described later Since the deodorization efficiency at 200 is reduced, it should be possible to separate the electrolyte solution by dropping it.

In addition, the electrolytic solution used in the first deodorization module 100 may be collected in the first solution collection unit 136 to be discharged or reused through a post-treatment process.

Next, chlorine (Cl ₂ ) gas which may be generated by the reaction proceeding in the first deodorization module 100 and the acidic odorous substances contained in the exhaust gas through the second deodorization module 200 can be removed.

In addition, the second deodorization module 200 includes a second tank 210 and the second reactor 220, in particular, the tubular second reactor 220 is one side is connected to the second tank (210) , The other side is exposed to the outside, the second inlet 221 is formed on the lower side of the portion exposed to the second reactor 220, the ammonia (NH ₃ ) discharged from the first exhaust port 135 The first exhaust port 135 may be connected to the exhaust gas from which the basic malodorous substance including) may be introduced into the second intake port 221.

In addition, at least one second injection nozzle 222 connected to the second bath 210 inside the second reactor 200 to inject a basic solution including sodium hydroxide (NaOH) stored in the second bath 210. ) Is installed, and the discharge port direction of the second injection nozzle 222 may be disposed to face a space in which the exhaust gas containing the acidic odorous substance stays inside the second reaction tank 220.

In this case, the basic solution includes sodium hydroxide (NaOH), and is supplied to the second water tank 210.

Particularly, in the second solution reaction unit 223, the basic solution sprayed by the second injection nozzle 222 and the ammonia (NH ₃ ) introduced through the second intake port 221 and the complex odorous substance are removed. Chlorine (Cl ₂ ) gas and acidic odorous substances remaining in the exhaust gas are removed by reaction with the gas, and the chemical reaction of the odorous substances by sodium hydroxide (NaOH) proceeds as shown in Scheme 4 below. Basic odorous substances that have not been processed in the) can be removed from the second deodorization module 200.

Scheme 4

Cl ₂ + 2NaOH → NaOCl + NaCl + H ₂ O

H ₂ S + NaOH → Na ₂ S + 2H ₂ O

CH ₃ SH + NaOH → CH ₃ SNa + H ₂ O

In addition, the second solution reaction part 223 is filled with a large porosity and a specific surface area in order to increase the reaction efficiency of the basic solution, chlorine (Cl ₂ ) gas and acidic odorous substances in the exhaust gas in the second solution reaction part 223. Can be filled.

In addition, the second solution removing unit 224 is for removing the basic solution contained in the exhaust gas reacted with the basic solution in the second solution reaction unit 223, and if not removed, the third deodorization will be described later. Since the deodorization efficiency in the module 300 is reduced, it should be possible to separate the basic solution by dropping it.

In addition, the basic solution used in the second deodorization module 200 is collected in the second solution collection unit 226 to be discharged or reused after the post-treatment process.

Next, the first deodorization module 100 and the second deodorization module 200 are not removed through the aqueous hydrogen peroxide (H ₂ O ₂ ) and sodium bicarbonate (NaHCO ₃ ) solution through the third deodorization module 300. Residual bad odorous substances can be removed.

In addition, the third deodorization module 300 includes a third water tank 310 and a third reaction tank 320, in particular, the tubular third reaction tank 320 is one side is connected to the third water tank (310). The other side is exposed to the outside.

In this case, a third intake port 321 is formed on the lower side of the portion in which the third reactor 320 is exposed to the outside, and chlorine (Cl ₂ ) discharged from the second exhaust port 225. And the second exhaust port 225 and the third intake port 321 are connected to allow the exhaust gas from which the acid odor substance has been removed.

In addition, at least one inside of the third reactor 320 is connected to the third tank 310 and sprays aqueous hydrogen peroxide (H ₂ O ₂ ) and sodium bicarbonate (NaHCO ₃ ) aqueous solution stored in the third tank 310. The third injection nozzle 322 is installed, and the discharge port direction of the third injection nozzle 322 may be disposed to face a space in which the exhaust gas containing the malodorous substance stays inside the third reactor 320. .

At this time, the hydrogen peroxide solution (H ₂ O ₂ ) and sodium bicarbonate (NaHCO ₃ ) aqueous solution is supplied to the third tank (310) to provide.

In particular, the third solution reaction unit 323 flows through the aqueous hydrogen peroxide solution (H ₂ O ₂ ), sodium bicarbonate (NaHCO ₃ ), and the third intake port 321 sprayed by the third injection nozzle 322. Reacting with the exhaust gas passing through the second deodorization module 200 is removed residual odorous substances not treated in the exhaust gas, by the aqueous hydrogen peroxide (H ₂ O ₂ ) and sodium bicarbonate (NaHCO ₃ ) aqueous solution The reaction proceeds as shown in Scheme 5 so that the remaining odorous substances that are not processed in the first deodorization module 100 and the second deodorization module 200 can be removed from the third deodorization module 300.

Scheme 5

2NH3 + 3H ₂ O ₂ = 6H ₂ O + N ₂

2NH3 + 4H ₂ O ₂ = 5H ₂ O + NH ₄ NO ₃

NH3 + 4H ₂ O ₂ = 5H ₂ O + HNO ₃

In addition, in order to increase the reaction efficiency of the aqueous solution of hydrogen peroxide (H ₂ O ₂ ), sodium bicarbonate (NaHCO ₃ ), and residual odorous substances in the exhaust gas, the third solution reaction part 323 is filled with a large porosity and specific surface area. The three solution reaction part 323 may be filled.

In addition, the aqueous hydrogen peroxide (H ₂ O ₂ ) and sodium bicarbonate (NaHCO ₃ ) aqueous solution used in the third deodorization module 300 is collected in a third solution collection unit 326 and discharged or reused after a post-treatment process. Do it.

In addition, the third solution removing unit 324 reacts with the aqueous hydrogen peroxide solution (H ₂ O ₂ ) and the sodium bicarbonate (NaHCO ₃ ) solution in the third solution reaction unit 323 and the remaining aqueous solution contained in the exhaust gas. Finally, the gas from which the odorous substance has been removed is discharged through the third exhaust port 325.

In summary, in the first deodorization module 100, an indirect oxidation reaction occurs by the direct oxidation through the electrolysis tank 110 and the electrolytic aqueous solution generated by the electrolysis tank 110, and thus, a complex odorous substance including ammonia is generated. In the second deodorizing module 200, the acidic odorous substance which is not removed by the first deodorizing module 200 is removed through a chemical reaction.

Subsequently, in the third deodorization module 300, residual odorous substances not removed from the first deodorization module 100 and the second deodorization module 200 are removed through a chemical reaction.

In addition, each structure of the first deodorizing module 100 to the third deodorizing module 300 can be configured in the same way, and can be configured to be compatible at any time when replacement of the components constituting the deodorizing module, deodorizing module The number of can be added as needed.

1: gas inlet
2: nozzle
3: tank
4: exhaust port
100: first deodorization module
110: electrolysis tank
120: first tank
130: first reactor
131: first intake port
132: first injection nozzle
133: first solution reaction unit
134: first solution removing unit
135: first exhaust port
136: first solution collector
200: second deodorization module
210: second tank
220: second reactor
221: second intake port
222: second injection nozzle
223: second solution reaction part
224: second solution removing unit
225: second exhaust port
226: second solution collector
300: third deodorization module
310: third tank
320: third reactor
321: third intake port
322: third injection nozzle
323: third solution reaction unit
324: third solution removing unit
325: third exhaust port
326: third solution collector

Claims (3)

Electrolysis tank;
The first tank for storing the electrolytic solution while being connected by the electrolysis tank and the pipe, formed independently from the first tank and disposed on the upper end of the first tank, one side is connected to the first tank, the other side is external A first reactor provided to be exposed to the first reactor, a first inlet provided on a lower outer circumferential surface of the first reactor, a first exhaust port provided on an upper surface of the first reactor, and connected to the first water tank, A first deodorizing module including at least one first spray nozzle which is installed and sprays the electrolytic solution stored in the first tank;
A second tank disposed on the side of the first tank, having a space independent of the first tank, and storing sodium hydroxide, formed independently of the second tank and disposed on the upper end of the second tank, one side of the first tank A second reactor connected to the second tank, the other side of which is provided on the other side of the second reactor, the second intake port connected to the first exhaust port while being provided on a lower outer circumferential surface of the second reactor, and a second reactor provided on the upper surface of the second reactor. A second deodorization module connected to the second exhaust port, the second deodorization module including at least one second injection nozzle installed in the second reactor and injecting sodium hydroxide (NaOH) stored in the second bath; And
The third tank disposed on the side of the second tank, having a space independent of the second tank and storing the aqueous hydrogen peroxide (H ₂ O ₂ ) and aqueous solution of sodium bicarbonate (NaHCO ₃ ), is formed independently of the third tank While disposed on the upper end of the first tank, one side is connected to the third tank, the other side is provided in the third reaction tank, the lower outer peripheral surface of the third reaction tank provided to be exposed to the outside and connected to the second exhaust port 3 intake port, the third exhaust port provided on the upper surface of the third reactor, the third tank is connected, the hydrogen peroxide (H ₂ O ₂ ) and sodium bicarbonate stored in the third tank while being installed in the third reactor (NaHCO ₃ ) Modular malodor removing scrubber comprising a; third deodorizing module comprising at least one third injection nozzle for spraying an aqueous solution. The method of claim 1,
The first deodorization module,
Modular malodor removing scrubber comprising the progress of the reaction that ammonia (NH ₃ ) and complex malodorous substances are oxidized and removed. The method of claim 1,
The electrolysis tank is
A modular malodor removing scrubber, characterized in that an electrolytic aqueous solution containing hydroxide ions (OH-) and sodium hypochlorite (NaOCl) is produced and fed to the first bath.

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