KR100460179B1 - Method of removal system with odor, VOC and hazardous gas in exhaust gas using electrolyte water of electrolysis - Google Patents

Abstract

The present invention uses the acidic and alkaline water produced by electrolysis of the electrolytic water and the oxidizing agent and the absorbing solvent mixed therewith, odor gas, VOC (odor) generated in a paint factory, a petrochemical plant, a printing plant, an automobile coating plant, and a wastewater treatment plant. The present invention relates to an apparatus for removing volatile organic compounds) and harmful gases, the apparatus of the present invention provides an electrolysis device (10) for electrolyzing electrolyzed water to generate acidic and alkaline water, and supplying an oxidant to add an oxidant to the acidic water. Odor oxidant supply device 20, the sorbent supply device 30 for supplying the absorbent solubilizer so that the absorbent solubilizer is added to the alkaline water, and the odor gas, VOC flowing in the acidic water to which the oxidant is added and the alkaline water to which the absorbing solvent is added, VOC And a cleaning device 40 for removing odor gas, VOC and harmful gas by spraying on harmful gas, respectively. By using the oxidizing agent and the absorbent solubilizer mixed in to remove the odor gas, VOC and harmful gas at the same time, there is an effect to protect the operator and prevent environmental pollution.

Description

Method of removal system with odor, VOC and hazardous gas in exhaust gas using electrolyte water of electrolysis

The present invention relates to a device for removing odor gas, VOC and harmful gases, and in particular, an acidic and alkaline water produced by electrolyzing electrolyzed water and an oxidizing agent and an absorbing solvent mixed therewith, a paint factory, a petrochemical plant, and a printing plant. The present invention relates to an apparatus for simultaneously removing malodorous gases, VOCs and harmful gases using electrolysis of water to remove odorous gases, VOCs (Volatile Organic Compounds) and toxic gases generated from automobile coating plants and wastewater treatment plants. In addition, the present invention also relates to a method for simultaneously removing malodorous gas, VOC and harmful gas using electrolysis of water.

In general, in a paint factory, a petrochemical plant, a printing plant, an automobile coating plant, and a wastewater treatment plant, odorous substances and harmful pollutants are formed in a large amount.

In order to remove such odorous gases and harmful substances, conventionally, acidic water is sprayed in an open indoor storage tank or fermentation aging tank to neutralize and oxidize alkaline gases such as ammonia and amines and neutral oxidizing gases contained in odorous gases and harmful gases. To remove. However, these odorous gases and harmful gases always contain acidic gases such as hydrogen sulfide and mercaptans, neutral reducing gases and VOCs, which are not removed by acidic water. There was a problem that the working conditions of the environment was poor and polluted the environment.

In addition, volatile organic compounds (VOCs) are produced in paint plants, petrochemical plants, printing plants, and automobile coating plants. These volatile organic compounds are generally air pollution-related substances that collectively represent hydrocarbon compounds having a vapor pressure of 0.02 Psi or higher or below a boiling point of less than 100 ° C, and form optical smog, ozone generation, and odor causing substances by photochemical reactions with nitrogen oxides. It is defined as a substance. In order to regulate the discharge of harmful substances including volatile organic compounds, the Republic of Korea has newly established regulations on air pollution preservation law to establish emission control and prevention facilities. However, the technology to fundamentally remove such volatile organic compounds has been insufficient until now.

Accordingly, the present invention has been made in order to solve the problems of the prior art as described above, by using a strong oxidizing agent and an absorbent solubilizer mixed with acidic and alkaline water generated by electrolysis of electrolytic water and odor gas, VOC and It is an object of the present invention to provide an apparatus for removing odorous gases, VOCs and harmful gases simultaneously using electrolysis of water, which can protect workers and prevent environmental pollution by removing harmful gases, and a method of removing the harmful gases.

1 is a schematic diagram of an apparatus for simultaneously removing odor gas, VOC and harmful gas using electrolysis of water according to a first embodiment of the present invention,

FIG. 2 is a schematic view of part A of the removal device shown in FIG. 1,

3 is a schematic diagram of an apparatus for simultaneously removing odor gas, VOC and harmful gas using electrolysis of water according to a second embodiment of the present invention.

Figure 4 is a schematic diagram of the simultaneous removal of odor gas, VOC and harmful gas using the electrolysis of water according to a third embodiment of the present invention.

♠ Explanation of symbols on the main parts of the drawing ♠

10: electrolysis device 11: electrolytic cell

12: diaphragm 13, 14: storage tank

15, 16: supply line 20: oxidant supply device

30: Absorption solution supply device 40: Cleaning device

41, 51: washing unit 42, 52: injection device

43: casing 44: guide feather

45: injection nozzle 46: inlet

53: mist eliminator 54: gas outlet

The apparatus of the present invention for achieving the object as described above, an electrolysis device for electrolyzing electrolyzed water to produce acidic water and alkaline water, and an oxidant supply device for supplying an oxidant to add the oxidizing agent to the acidic water; Absorbent supplying device for supplying the absorbent solubilizer so that the absorbent solubilizer is added to the alkaline water, and the odor gas, VOC and VOC by spraying the odor gas, VOC and harmful gas into the acidic water and the oxidizing agent added alkaline water, respectively And a cleaning device for simultaneously removing harmful gas and discharging the cleaned gas to the atmosphere. In addition, the cleaning device sprays acidic water added with an oxidizing agent to polarly dissolve and decompose the alkaline gas and the neutral oxidizing gas contained in the odor gas, the VOC and the harmful gas by electrochemical reaction, neutralization, and oxidation reaction. (1) A second cleaning unit for spraying, dissolving, separating and removing acidic and neutral gases contained in odor gas, VOC, and noxious gas by electrochemical reaction, neutralization and reduction reaction by injecting alkaline water with absorbent solvent added thereto. Consists of

In addition, the method of the present invention comprises the steps of electrolyzing electrolyzed water to produce acidic water and alkaline water, respectively, adding an oxidizing agent to the acidic water and adding an absorbing dissolving agent to the alkaline water, and the acidic water to which the oxidizing agent is added. Spraying odor gas, VOC and harmful gas into the gas to neutralize and oxidize the alkaline gas and the neutral oxidizing gas and simultaneously remove the odor gas from which the alkaline gas and the neutral oxidizing gas are removed. Spraying to the VOC and harmful gas, neutralizing and reducing the acid gas and neutral gas to remove at the same time and to discharge the cleaned gas to the atmosphere.

Hereinafter, with reference to the accompanying drawings, preferred embodiments of the odor gas, VOC and harmful gas simultaneous removal apparatus using the electrolysis of water according to the present invention and a method for removing the same will be described in detail.

<First Embodiment>

1 is a schematic diagram of an apparatus for simultaneously removing odor gas, VOC, and noxious gas using electrolysis of water according to a first embodiment of the present invention, and FIG. 2 is a schematic diagram of a portion A of the removal apparatus shown in FIG. 1. .

As shown in Fig. 1 and 2, the apparatus of the present invention is an electrolysis device 10 for producing an acidic water and an alkaline water by electrolyzing electrolyzed water in which an electrolytic material (NaCl, KCl, etc.) is dissolved, and such an electrolysis device. An oxidant supply device 20 for supplying an oxidant to the oxidant is added to the electrolyzed acidic water in (10), and an absorbent solubilizer for supplying the absorbent solubilizer to be added to the alkaline water electrolyzed in the electrolysis device 10 A supply device 30 and a cleaning device 40 for simultaneously removing odor gas, VOC, and noxious gas by using acidic water to which an oxidizing agent is added and alkaline water to which an absorption solvent is added. Here, in the electrolytic cell 11 of the electrolysis device 10, electrolytic water in which electrolytic materials (NaCl, KCl, etc.) of about 0.05% to 0.1% are dissolved in water is stored.

The electrolytic cell 11 thus stored is provided with a positive electrode and a negative electrode at predetermined intervals, and a diaphragm 12 is provided between the positive electrode (+) and the negative electrode (-). In addition, both sides of the electrolytic cell 11 are provided with an acidic water storage tank 13 and an alkaline water storage tank 14 for storing acidic and alkaline water generated by electrolysis, respectively. At this time, in the electrolytic cell at the anode side, pH is 2.0 to 3.0, the redox potential (ORP) is in the range of +1,000 to +1,200 mV, the conductivity is about 1.7, and strong acidic water smelling lax is produced. 11-12, redox potential (ORP) is in the range of -700 to -900 mV, conductivity is about 1.9 and odorless strong alkaline water is produced. The acidic water and the alkaline water thus formed are stored in the acidic water storage tank 13 and the alkaline water storage tank 14, respectively.

The acidic water storage tank 13 is connected to an oxidant supply device 20 for supplying an oxidizing agent that strongly oxidizes and removes volatile organic compounds (VOCs) and decomposes or dissolves in water or polarity. The absorption solvent supply device 30 is connected to the dissolved VOC by polarity or radical (group) conversion to help remove harmful gases. As the oxidizing agent, a strong oxidizing agent such as Cl0 ₂ , ozone, KMnO ₄ is used, and as the absorbing dissolving agent, an ionic surfactant, an additive, a solvent adsorbent, a polar dissolving agent, etc. may be appropriately combined.

In addition, the acidic water storage tank 13 and the alkaline water storage tank 14, the acidic water collection tank 48 and the alkaline water formed in the lower portion of the washing apparatus 40, respectively, the acidic water to which the oxidizing agent is added and the alkaline water to which the absorbing solubilizer is added. It is connected to supply to the collection tank 49, respectively.

The rinsing device 40 is odor using acidic and alkaline water generated in the electrolysis device 10 and oxidizing agent and absorbing reducing agent supplied from the oxidant supply device 20 and the absorbent dissolving agent supply device 30, respectively. At the same time to remove the gas, VOC and harmful gases, the first cleaning unit 41 for cleaning using acidic water added oxidizing agent and the second cleaning unit 51 for cleaning using alkaline water added absorbent dissolving agent. It is composed.

Here, the first cleaning part 41 includes one or a plurality of first injectors 42. The first injector 42 is formed with a cylindrical casing 43 serving as a body. The casing 43 has a cylindrical shape having the same inner and outer diameters as the upper part and the lower part, and is formed of a material capable of sufficiently maintaining airtightness as a pipe capable of constantly inducing odor gas, VOC, and harmful gas to be introduced. In addition, an acidic water supply pipe 15 connected to an acidic water collection tank 48 is disposed at a central portion of the casing 43 to supply acidic water to which an oxidant is added, and the acidic water supply pipe 15 is a guide feather 44. at one end of the guide vane.

In addition, the other end of the guide feather 44 is firmly fixed to the inner surface of the casing 43, thereby fixing the guide feather 44 and the acidic water supply pipe 15. At the outlet portion of the acidic water supply pipe 15, an injection nozzle 45 for injecting the supplied acidic water is formed. In addition, the guide feather 44 is in the form of a screw so that the odor gas, VOC and noxious gas supplied can be flowed in a streamlined form. In addition, the lower end of the casing 43 is open to serve as an outlet for discharging the supplied acidic water and odor gas, VOC and harmful gas.

The first injector 42 formed therein is formed with an inlet 46 through which malodorous gas, VOC and harmful gas are introduced, and the acidic water from which a portion of the malodorous gas, VOC and harmful gas is removed is stored outside. There is formed an acidic water collection tank 48 that can be discharged. In addition, the inlet 46 may be additionally provided with a mist remover (pretreatment) for removing the mist and dust contained in the odor gas, VOC and harmful gas.

In addition, the lower portion of the first cleaning unit 41 is coupled to communicate with the second cleaning unit 51, so that the odor gas, VOC, and noxious gas partially cleaned in the first cleaning unit 41 are the second cleaning unit. And supplied to the 51 to remove the mist between the first washing unit 41 and the second washing unit 51 so that mist generated by the sprayed acidic water does not move to the second washing unit 51. The mist eliminator 47 is provided. One or more second injection apparatuses 52 in which the alkaline water supply pipes 16 connected to the alkaline water collection tank 48 are disposed are disposed in the second washing unit 51 coupled as described above.

Here, the second injector 52 has a first injector (except that the one end of the guide feather 44 is not coupled to the alkaline water supply pipe 16, but the guide feathers 44 are coupled to each other). Same as 42). The second injector 52 thus formed is disposed in a direction opposite to the first injector 42. At this time, the alkaline water supply pipe 16 is disposed in the second injector 52 so that the alkaline water can be supplied in the opposite direction to the guide feather 44.

The mist eliminator 53 for filtering another contaminant or moisture which is not removed by the injected acidic and alkaline water is disposed on the upper portion of the second injector 52 disposed as described above. The upper part of the mist eliminator 53 is formed with a gas discharge port 54 through which the odor gas, VOC, and noxious gas are removed at the same time, and the lower portion stores alkaline water from which the odor gas, VOC and noxious gas are removed. An alkaline water collection tank 49 which can be discharged to the outside is formed.

In the following, it will be described how to remove odorous gases and harmful gases, including VOCs through the operating relationship of the device of the present invention configured as described above.

First, power is supplied to generate acidic and alkaline water in the electrolysis device 10. The acidic water and the alkaline water thus generated are stored in the acidic water storage tank 13 and the alkaline water storage tank 14, respectively. In addition, an oxidant supplied through the oxidant supply device 20 is added to the acidic water storage tank 13, and an absorbent dissolving agent supplied through the absorbent solvent supply device 30 is added to the alkaline water storage tank 14.

Then, odor gas, VOC, and harmful gas generated in a paint factory, a petrochemical factory, a printing factory, an automobile paint factory, and a wastewater treatment plant are supplied through the inlet 46 of the first cleaning unit 41. Then, the malodorous gas, the VOC and the noxious gas are moved downward by the guide vanes 44 of the first injector 42 to form a swirl flow. When odor gas, VOC, and noxious gas flow while forming a swirl flow along the inside of the first injector 42, the acidic water to which the oxidant is added is supplied through the acidic water supply pipe 15. Alkaline gases such as ammonia and amines contained in the malodorous gas and the harmful gas are sprayed by spraying the acidic water to which the oxidizing agent supplied through the acidic water supply pipe 15 is added to the malodorous gas, the VOC and the harmful gas through the injection nozzle 45. And oxidizing gases, including VOCs, are electrochemically neutralized and oxidized to remove them. VOCs are oxidized by acidic water and oxidants added thereto, and most of them are removed. That is, the odor gas and the VOC are removed by reacting and oxidizing with an oxidizing agent and acidic water as shown in Scheme 1 below.

The gas from which most of the VOC and some odorous gases and harmful gases are removed is supplied to the second cleaning unit 51. The malodorous gas, VOC, and noxious gas thus supplied are moved upward by the guide feather 44 of the second injector 52 to form a swirl flow. When odor gas, VOC, and noxious gas flow while forming swirl flow along the inside of the second injector 52, alkaline water to which the absorbing solvent is added is supplied through the alkaline water supply pipe 16. The hydrogen sulfide, mercaptans and the like contained in the malodorous gas, VOC and the noxious gas by spraying the alkaline water to which the absorption solvent is supplied through the alkaline water supply pipe 16 is added to the malodorous gas, VOC and the noxious gas through the injection nozzle 45. Acidic gases such as higher fatty acids and neutral gases are simultaneously removed by electrochemical neutralization and oxidation. At this time, the absorption solubilizer added to the alkaline water serves to remove the odor gas, VOC and harmful gas. That is, the absorbing solvent reacts as in Scheme 2 to help remove odorous gases and harmful gases.

Through this process, clean gas from which odor gas, VOC, and noxious gas are removed, and other remaining contaminated liquid and moisture are moved upwardly of the second cleaning part 51. The polluted liquid and moisture, which are thus moved, are filtered by the mist remover 53 and only clean gas passes through the mist remover 53 and is discharged through the gas discharge unit 54.

The casing of the first and second injectors 22 and 52 of the present invention may be formed in a conical shape in which the upper portion is formed in a cylindrical shape having a constant inner diameter and an outer diameter, and the lower portion is made smaller in diameter. In addition, the casing of the first and second injectors 22 and 52 of the present invention may be formed like a fallopian tube that becomes wider from the top to the bottom.

Second Embodiment

The removal device according to the second embodiment of the present invention is a odor gas, VOC and harmful gas by using a cleaning unit for removing odor gas, VOC and harmful gas by using acidic water to which the oxidizing agent is added and alkaline water to which an absorbing solvent is added. It is the same as the first embodiment except that the cleaning unit for removing the same at the same time is separated separately and does not use the swirl flow. Therefore, the same or similar reference numerals will be given to the same or similar components and description thereof will be omitted here.

3 is a schematic diagram of an apparatus for simultaneously removing odor gas, VOC, and noxious gas using electrolysis of water according to a second embodiment of the present invention.

As shown in FIG. 3, the acidic water cleaning unit 61 for cleaning using acidic water to which an oxidant is added includes a casing 62. The inlet 63 of the odor gas, VOC and harmful gas is formed on the side of the casing 62, and the oxidant is attached to the upper surface of the inlet 63 such as dust contained in the odor gas and the noxious gas. The filler layer 64 is formed so that the acidic water can be easily contacted. The injection device 65 is disposed above the fill layer 64 so that the acidic water to which the oxidant stored in the acidic water collection tank 67 is added can be supplied and sprayed by the pump. In addition, a mist remover 66 for removing contaminants and moisture, which are not removed by the acidic water to which the oxidant is added, is disposed at the upper portion of the injector 65, and a discharge port is formed at the upper portion of the mist remover 66. 67) is formed. In addition, the acidic water collection tank 68 is formed to drain the stored acidic water to the outside.

And the alkaline water washing part 71 which wash | cleans using alkaline water is formed similarly to the acidic water washing part 61, At this time, the discharge port 67 and the alkaline water washing part 71 of the acidic water washing part 61 are carried out. Inlet 73 is connected.

The odor gas, VOC and noxious gas simultaneous removal apparatus using the electrolysis of water of the present invention configured as described above is removed by the same method as the first embodiment.

Third Embodiment

The removing device according to the third embodiment of the present invention is mixed with acidic water to which the oxidizing agent is added in a mixing device that induces a separate gaseous reaction before the incoming odor gas, VOC and harmful gas are supplied to the cleaning device. It is configured to be supplied to the cleaning apparatus and is the same as the first embodiment except that the arrangement of each component is changed little by little so that the malodorous gas, VOC and noxious gas passed through the mixing apparatus can flow from the lower side to the upper side of the cleaning apparatus. . Therefore, the same or similar reference numerals will be given to the same or similar components and description thereof will be omitted here.

4 is a schematic diagram of an apparatus for simultaneously removing odor gas, VOC, and noxious gas using electrolysis of water according to a third embodiment of the present invention.

As shown in Figure 4, the removal device of the present invention includes a mixing device 90 for mixing the incoming odor gas, VOC and harmful gas and the acidic water to which the oxidant supplied from the acidic water storage tank 13 is added. The mixing device 90 is formed with a cylindrical casing 91 serving as a body. The casing 91 has a cylindrical shape in which the upper part and the lower part have the same inner diameter and outer diameter, and is formed of a material capable of sufficiently maintaining the airtightness as a pipe capable of constantly inducing odor gas, VOC, and harmful gas to be introduced. In addition, a pipe 92 connected to the acidic water storage tank 13 is disposed at an intermediate portion of the casing 91 to supply acidic water to which an oxidant is added, and the pipe 92 has a guide vane 93. Is coupled to one end of the

In addition, the other end of the guide vane 93 is firmly fixed to the inner surface of the casing 91, thereby fixing the guide vane 93 and the pipe 92. An injection nozzle 94 for injecting the supplied acidic water is formed in the outlet portion of the pipe 92. In addition, the guide feather 93 is in the form of a screw so that the odor gas, VOC and noxious gas supplied can be flowed in a streamlined form.

The mixing device 90 configured as described above neutralizes and oxidizes alkaline gases such as ammonia and amines contained in odorous gases and harmful gases, and oxidizing gases such as VOCs by electrochemical neutralization and oxidation. It is oxidized by an oxidizing agent and is mostly removed.

The odor gas, VOC, and noxious gas, firstly cleaned through the mixing device 90, are supplied to the cleaning device 80, and washed through the first cleaning part 81 for cleaning using acidic water to which an oxidizing agent is added. do. The odor gas, VOC, and noxious gas thus cleaned are cleaned in the second cleaning unit 83 which cleans using alkaline water to which chemicals are added after the mist generated by acidic water is removed through the mist remover 82. . The clean gas from which the odor gas, the VOC and the harmful gas have been removed, and the remaining contaminated liquid and moisture are discharged to the atmosphere through another mist remover 84.

As described in detail above, the apparatus for simultaneously removing odor gas, VOC, and harmful gas using the electrolysis of water of the present invention, and the method of removing the odor gas, VOC, and harmful water using acidic and alkaline water and oxidizing and absorbing solvents added thereto By effectively removing the gas at the same time, it protects the worker and prevents environmental pollution.

The technical idea of the apparatus for removing odorous gas, VOC, and noxious gas simultaneously using the electrolysis of water of the present invention and the method of removing the same have been described together with the accompanying drawings. It is not intended to limit the invention.

Claims (3)

delete delete An electrolysis device that electrolytically generates acidic water and alkaline water, an oxidant supply device for supplying an oxidant, an absorbent supply device for supplying an absorbing solvent, a mixing device for spraying and mixing acidic water with an oxidant added thereto, And a scavenging device that sequentially removes odor gas, VOC (Volatile Organic Compounds) and harmful gases by sequentially spraying acidic water added with an oxidizing agent and alkaline water added with an absorption solvent to the inflow gas introduced through the mixing device. As a method of removing odor gas, VOC and harmful gas by using the configured device, Adding an oxidizing agent to the acidic water through an oxidizing agent supplying device and adding an absorbing dissolving agent to the alkaline water through an absorbing dissolving agent supplying device; Spraying and mixing the acidic water to which the oxidant is added to the odor gas, the VOC, and the harmful gas introduced into the mixing device to neutralize and oxidize the alkaline gas and the neutral oxidizing gas to remove the first, and The acidic water to which the oxidant is added is sprayed onto the first cleaned malodorous gas, VOC, and noxious gas flowing into the cleaning device to neutralize and oxidize the alkaline gas and the neutral oxidizing gas to remove the secondary, and then the absorption solvent is added. Injecting the purified alkaline water into the secondary cleaned malodorous gas, VOC, and noxious gas flowing in the cleaning device to neutralize and reduce acidic gas and neutral gas, and then discharge the cleaned gas to the atmosphere. How to feature.