KR20180136791A - Module type Scrubber for odor removal - Google Patents

Abstract

The present invention provides a module type scrubber for odor removal, which comprises an electrolysis tank, a first deodorization module, a second deodorization module, and a third deodorization module. When treating complex exhaust gases containing acidic, basic, and neutral odorous substances, the maintenance and repair work of the scrubber can be easily and simply maintained.

Description

[0001] The present invention relates to a module type scrubber for odor removal,

The present invention relates to an apparatus for removing odor, and more particularly, to a scrubber for chemically removing malodorous gas during an industrial process in which odorous gas is generated.

In general, deodorization methods for removing odors include a gas absorption method, a direct combustion method, a catalytic oxidation method, an ozone oxidation method, an adsorption method using an adsorbent or an ion exchange method, and an electrode method using an electrostatic precipitator. And it may require vibration damping, dehumidification, water washing or the like as a pre-treatment.

In particular, the gas absorption method is a method of changing a malodorous substance contained in an exhaust gas from a gas state to a liquid state, and absorbing the malodorous substance in a gaseous state into an absorbent in a liquid state to remove the malodorous substance.

At this time, when selecting the absorbent, the selection should be made considering the solubility, volatility, viscosity, chemical stability and flammability of the contaminants to be removed.

The gas absorption method can be divided into a liquid dispersion method, which is a method of injecting an absorption liquid into an exhaust gas in accordance with an operation method, and a gas dispersion method, in which an exhaust gas is blown into an absorption liquid.

In particular, when the liquid dispersion method is applied, odorous substances can be removed by using an acid or alkali chemical that chemically processes the exhaust gas containing odorous substances.

In general, the occurrence of odor is a complex feature. Odorous substances are three kinds of acidic, basic and neutral. More specifically, acidic sulfur compounds and organic acids, basic nitrogen compounds, and other odorous substances having neutrality .

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

In particular, when removing odor materials 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 showing a device according to the prior art.

The conventional scrubber includes a gas inlet 1, an injection port 2, a water tank 3 and an exhaust port 4. The scrubber includes an exhaust gas containing odor substances flowing into the scrubber body through the gas inlet 1, Is treated by the deodorizing solution injected from the injection port 2 and the residual deodorizing solution is collected again in the water tank 3 and finally the gas from which the odorous substance is removed is discharged through the exhaust port 4. [

Further, in the general tower type scrubber, the water tank 4 for storing the deodorizing solution is not divided, and thus there is a limit to the removal of a complex exhaust gas including acidic, basic and neutral odor substances.

In order to solve such problems, a highly efficient multi-cleansing dust collecting device of Patent Application No. 10-2006-0051680 (filed on June 6, 2006), which is filed in the Korean Intellectual Property Office, is disclosed, but an odorous substance of acidic, basic, When the untreated exhaust gas is continuously treated, the parts for treating the characteristics of the different odorous substances are integrated in the form of a tower, and unnecessary There is a problem to be performed at one time.

DISCLOSURE Technical Problem Accordingly, the present invention has been made keeping in mind the above problems occurring in the prior art, and an object of the present invention is to solve the above-mentioned problems, and it is an object of the present invention to provide an exhaust gas purifying apparatus, And it is an object of the present invention to provide a modular odor elimination scrubber which can easily maintain and repair only a part necessary for performing maintenance work.

The module odor elimination scrubber according to the present invention is characterized in that the first aspect of the present invention is a scrubber of an odor elimination type according to the first aspect of the present invention comprises a electrolytic bath, a first water tank for storing electrolytic aqueous solution containing hydroxide ion (OH-) and sodium hypochlorite (NaOCl) A first reaction tank connected to the first tank, a first intake port provided on a lower outer circumferential surface of the first reaction tank, a first exhaust port provided on an upper surface of the first reaction tank, and a second exhaust port connected to the first tank, A first deodorization module including at least one or more first spray nozzles for spraying an electrolytic aqueous solution stored in the first water tank, the first deodorization module being disposed on a side surface of the first water tank and having a space independent from the first water tank, A second reaction tank in which one side is connected to the second water tank, a second reaction tank provided in a lower outer surface of the second reaction tank and connected to the first exhaust pipe, A second exhaust port provided on an upper surface of the second reaction tank, at least one of a first air inlet, a second air outlet, a second exhaust port connected to the second water tank and spraying sodium hydroxide (NaOH), which is installed in the second reaction tank, (H ₂ O ₂ ) and sodium bicarbonate (NaHCO ₃ ), which is disposed on a side surface of the second water tank and has a space independent from the second water tank, A third reaction tank having one side connected to the third tank, a third intake port provided on a lower outer circumferential surface of the third reaction tank and connected to the second exhaust port, a third exhaust port provided on the upper surface of the third reaction tank, , 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 deodorization module is characterized in that the reaction of oxidizing and removing ammonia (NH ₃ ) and the complex odor substance is progressed.

Finally, the electrolytic bath is characterized in that an electrolytic aqueous solution containing hydroxide ion (OH-) and sodium hypochlorite (NaOCl) is generated and supplied to the first water tank.

The present invention can modularize a reaction tank for treating odorous substances having different properties so that the components of a plurality of deodorization modules are compatible and can be easily replaced when the maintenance and repair of the scrubber is required. The deodorization module can be easily separated and the maintenance and repair operation can be performed immediately, thereby providing an effect of increasing the efficiency of removing the malodor substances of the scrubber finally.

1 is a cross-sectional view of a conventional scrubber.
2 is a block diagram illustrating a process for removing odorous substances using the modular odor elimination scrubber of the present invention.
3 is an exemplary view showing the modular odor elimination scrubber of the present invention.

Hereinafter, the technical idea of the present invention will be described more specifically with reference to the accompanying drawings.

In addition, since the accompanying drawings are only illustrative examples for the purpose of more specifically illustrating the technical idea of the present invention, the technical idea of the present invention is not limited to the drawings.

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

First, the first deodorization module 100 removes ammonia (NH ₃ ) and complex odor substances. The first deodorization module 100 removes odor 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, residual acidic odor substances that have not been removed by the first deodorization module and the electrolytic bath 110 can be removed. In the first deodorization module 100, It is possible to remove chlorine (Cl ₂ ) which can be generated in material removal.

Finally, in the third deodorization module 300, residual odor substances that have not been removed from the first deodorization module 100 and the second deodorization module 200 are removed. At this time, hydrogen peroxide water (H ₂ O ₂ ) And sodium bicarbonate (NaHCO ₃ ) to remove the remaining odorous substances.

Next, FIG. 3 is an exemplary view showing the modular odor elimination scrubber of the present invention, and the modular odor elimination scrubber and the odor substance elimination reaction will be described in more detail.

The module type odor elimination 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 can remove ammonia (NH ₃ ) and complex odor substances contained in the exhaust gas through the electrolytic aqueous solution. The first deodorization module 100 can remove the ammonia (NH ₃ ) And a first reaction tank (130).

Particularly, the tubular first reaction tank 130 is connected to the first water tank 120 at one side, and the other side is exposed to the outside.

At this time, the first air inlet 131 is formed in the lower side of the portion exposed to the outside of the first reaction tank 130 so that the exhaust gas containing the odorous substance flows.

At least one first injection nozzle 132 connected to the first water tank 120 for spraying an electrolytic aqueous solution stored in the first water tank 120 is installed in the first reaction tank 130, The direction of the discharge port of the first injection nozzle 132 may be arranged so as to face the space where the exhaust gas containing ammonia (NH ₃ ) and the complex odor substance stays in the first reaction tank 130.

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

In the electrolytic bath 110, ammonia (NH ₃ ) can be directly oxidized and removed by the hydroxide ion (OH-) as shown in the following reaction formula 1, and this can be removed by electrolytic aqueous solution sprayed from the first spray nozzle 132 It is a reaction to remove ammonia (NH ₃ ) which may be partially dissolved.

[Reaction Scheme 1]

NH ₃ + 3OH ^- ? 0.5N ₂ + 3H ₂ O + 3e-

The first solution reacting section 133 reacts with the electrolytic aqueous solution injected by the first injection nozzle 132 and the exhaust gas flowing through the first intake port 131 to generate ammonia (NH ₃ ) in the exhaust gas. (NH ₃ ) is removed by indirect oxidation using sodium hypochlorite (NaOCl) as shown in Reaction Scheme 2 below.

[Reaction Scheme 2]

2NH ₃ + 3NaOCl -> N ₂ + + 3NaCl + 3H ₂ O

Also, the reaction for removing the complex odorous substance by sodium hypochlorite (NaOCl) proceeds as shown in the following reaction scheme (3).

[Reaction Scheme 3]

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

H ₂ S + ₄ NaOCl - > Na ₂ SO ₄ + ₄ NaCl

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

_{(CH 3) 2 S + 3NaOCl} → (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 order to increase the efficiency of the reaction between the electrolytic aqueous solution and the ammonia (NH ₃ ) in the exhaust gas and the complex odor substance, the first solution reacting part 133 is filled with a filler having a large porosity and a large specific surface area, Lt; / RTI >

The first solution removing unit 134 removes the electrolytic aqueous solution contained in the gas reacting with the electrolytic aqueous solution in the first solution reacting unit 133. If the electrolytic aqueous solution is not removed, The deodorization efficiency of the electrolytic solution 200 is reduced, so that the electrolytic aqueous solution can be dropped and separated.

In addition, the electrolytic aqueous solution used in the first deodorization module 100 may be collected in the first solution collecting part 136 and discharged or reused through a post-treatment process.

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

The second deodorization module 200 includes a second water tank 210 and a second reaction tank 220. Particularly, the tubular second reaction tank 220 has one side connected to the second water tank 210 , ammonia which is the other side there is to be exposed to the outside, the second reactor 220 is a second intake port 221 in the lower surface of the portion exposed to the outside are formed, discharged from the first exhaust port (135) (NH ₃ ) Is connected to the first exhaust port 135 so that the exhaust gas from which the basic odor-containing substance is removed can be introduced into the second intake port 221.

At least one second injection nozzle 222 for spraying a basic solution containing sodium hydroxide (NaOH), which is connected to the second water tank 210 and is stored in the second water tank 210, And the discharge port direction of the second injection nozzle 222 may be disposed in the second reaction tank 220 so as to face the space where the exhaust gas containing acidic odor substances stays.

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

Particularly, in the second solution reacting section 223, the basic solution injected by the second injection nozzle 222, the ammonia (NH ₃ ) flowing through the second intake port 221, and the exhaust gas The chlorine (Cl ₂ ) gas and the acidic odor substance remaining in the exhaust gas are removed by the reaction with the gas, and the chemical reaction of the odor substance by the sodium hydroxide (NaOH) proceeds as shown in the following reaction formula 4, The second deodorization module 200 can remove basic odor substances that have not been treated in the second deodorization module 200.

[Reaction Scheme 4]

Cl ₂ + ₂ NaOH → 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 order to increase the efficiency of the reaction between the basic solution and the chlorine (Cl ₂ ) gas in the exhaust gas and the acidic odor substance, the second solution reaction part 223 is filled with a filler having a large specific surface area and a porosity, Lt; / RTI >

The second solution removing unit 224 is for removing the basic solution contained in the exhaust gas which reacts with the basic solution in the second solution reacting unit 223. If the third solution removing unit 224 does not remove the basic solution, Since the deodorization efficiency in the module 300 is reduced, the basic solution must be able to fall and be separated.

In addition, the basic solution used in the second deodorization module 200 may be collected by the second solution collecting unit 226 and discharged or reused through a post-treatment process.

Next, the first deodorization module 100 and the second deodorization module 200 are removed through the third deodorization module 300 through the aqueous solution of hydrogen peroxide (H ₂ O ₂ ) and sodium bicarbonate (NaHCO ₃ ) The remaining odor substances can be removed.

The third deodorization module 300 includes a third water tank 310 and a third reaction tank 320. Particularly, the tubular third reaction tank 320 has one side connected to the third water tank 310 , And the other side is exposed to the outside.

At this time, a third intake port 321 is formed on the lower side of the portion exposed to the outside of the third reaction chamber 320. The chlorine (Cl ₂ ) discharged from the second exhaust port 225, The second exhaust port 225 and the third inlet port 321 are connected so that the exhaust gas from which acidic odor substances are removed can be introduced.

At least one of the third reaction vessel 320 is connected to the third vessel 310 and injects aqueous hydrogen peroxide solution (H ₂ O ₂ ) and sodium bicarbonate (NaHCO ₃ ) solution stored in the third vessel 310 The third injection nozzle 322 may be provided and the discharge port direction of the third injection nozzle 322 may be arranged to face the space where the exhaust gas containing the odorous substance stays in the third reaction chamber 320 .

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

Particularly, in the third solution reaction part 323, the hydrogen peroxide solution (H ₂ O ₂ ), sodium bicarbonate (NaHCO ₃ ) aqueous solution and the third air intake port 321, which are injected by the third injection nozzle 322, (H ₂ O ₂ ) and an aqueous solution of sodium bicarbonate (NaHCO ₃ ) to remove the remaining unpleasant odor substances in the exhaust gas by reacting with the exhaust gas passing through the second deodorization module The reaction proceeds as shown in the following Equation 5 so that the remaining odor substances not processed in the first deodorization module 100 and the second deodorization module 200 can be removed from the third deodorization module 300.

[Reaction 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 order to increase the efficiency of the reaction of the aqueous solution of hydrogen peroxide (H ₂ O ₂ ) and sodium bicarbonate (NaHCO ₃ ) and the residual odorous substances in the exhaust gas to the third solution reaction part 323, 3 solution reaction part 323.

In addition, the hydrogen peroxide solution (H ₂ O ₂ ) and sodium bicarbonate (NaHCO ₃ ) aqueous solution used in the third deodorization module 300 are collected in the third solution collector 326 and discharged or reused .

In addition, the third solution removing unit 324 removes the residual aqueous solution contained in the exhaust gas reacted with the hydrogen peroxide aqueous solution (H ₂ O ₂ ) and sodium bicarbonate (NaHCO ₃ ) aqueous solution in the third solution reacting unit 323, So that the gas from which odorous substances are removed is finally discharged through the third exhaust port 325.

In summary, in the first deodorization module 100, the direct oxidation through the electrolytic bath 110 and the indirect oxidation reaction by the electrolytic aqueous solution generated by the electrolytic bath 110 generate a complex odorous substance containing ammonia In the second deodorization module 200, the acidic odor substance that can not be removed from the first deodorization module 200 is removed through a chemical reaction.

Next, in the third deodorization module 300, residual odor substances that can not be removed from the first deodorization module 100 and the second deodorization module 200 are removed through a chemical reaction.

In addition, since the first deodorization module 100 to the third deodorization module 300 can be configured in the same manner, the deodorization module 300 can be configured to be compatible at any time when components constituting the deodorization module need to be replaced. May be added as needed.

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

Claims (3)

Electrolysis tank;
A first tank connected to the electrolytic tank by a pipe to store an electrolytic aqueous solution, a first tank connected to the first tank, a first tank provided at a lower outer surface of the first tank, A first exhaust port provided on an upper surface of the first tank, and at least one first spray nozzle connected to the first tank and spraying an electrolytic aqueous solution stored in the first tank, ;
A second water tank disposed on a side surface of the first water tank and having a space independent from the first water tank and storing sodium hydroxide, a second reaction tank having one side connected to the second water tank, A second exhaust port connected to the first exhaust port, a second exhaust port provided on an upper surface of the second reaction tank, and a second exhaust port connected to the second water tank, the sodium hydroxide A second deodorization module including at least one second injection nozzle for spraying NaOH); And
A third water tank disposed on a side surface of the second water tank and having a space independent from the second water tank and storing aqueous hydrogen peroxide solution (H ₂ O ₂ ) and sodium bicarbonate (NaHCO ₃ ) solution, A third reaction tank, a third intake port provided on a lower outer circumferential surface of the third reaction tank and connected to the second exhaust port, a third exhaust port provided on an upper surface of the third reaction tank, and a third reaction tank connected to the third reaction tank, And a third deodorization module including at least one third injection nozzle for spraying aqueous hydrogen peroxide solution (H ₂ O ₂ ) and sodium bicarbonate (NaHCO ₃ ) solution stored in the third water tank, Modular odor elimination scrubber. The method according to claim 1,
The first deodorization module includes:
Ammonia (NH ₃₎ and compound odorant modular odor scrubber comprising the progress of the reaction is removed is oxidized. The method according to claim 1,
The electrolytic bath
An electrolytic aqueous solution containing hydroxide ion (OH-) and sodium hypochlorite (NaOCl) is generated and supplied to the first water tank.

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