KR100932517B1 - Air purification apparatus which maximizes treatment efficiency and method the same - Google Patents

Abstract

PURPOSE: An apparatus for purifying air with maximized treatment efficiency and a method thereof are provided to increase efficiency for removing all kinds of bad smell materials by combining an oxidation process and a chemical liquid cleaning process. CONSTITUTION: A method for purifying air with the maximized treatment efficiency includes the following steps of: removing bad smell materials removable by oxidation and degradation in a rapid oxidation device(S110); cleaning the bad smell materials with acid cleaning liquid in an acid cleaning room(S120); and removing the removable bad smell materials and remaining acid cleaning liquid with alkali cleaning liquid(S130). An oxidation process is formed by spraying chlorine dioxide liquid inside the rapid oxidation device.

Description

Air purification apparatus which maximizes treatment efficiency and method thereof

The present invention relates to an air purifying apparatus for removing odors and air pollutants generated from odors and air pollutants, such as wastewater, livestock wastewater, manure, food treatment plants, and more specifically, an aqueous solution containing an oxidant may be used as odor gas and Basic, acidic and neutral by combining an oxidation process for oxidatively decomposing malodorous substances by contact and an acid and alkali cleaning process in which an aqueous solution containing an acid or alkali cleaner is contacted with the malodorous gas to absorb the malodorous substances into the cleaning solution and chemically neutralize them. The present invention relates to an air purifying apparatus and a method for maximizing treatment efficiency capable of removing all odorous substances.

In general, the environmental infrastructure necessary for our lives, such as sewage treatment plants, incinerators, food waste treatment facilities, landfills, etc., is recognized as hate facilities. In particular, air pollutants and odors generated by these environmental foundations have become complaints of local residents.

Odor refers to an unpleasant odor, which stimulates a person's mental and nervous system, causing damage in terms of emotional life and health. Ammonia, methylmercaptan, hydrogen sulfide, methyl sulfide, methyl disulfide, trimethylamine, acetaldehyde, styrene and the like are regulated by legal regulations. Odor substances may be divided into basic, acidic and neutral systems depending on pH. For example, ammonia and trimethylamine belong to the basic system, hydrogen sulfide, methyl mercaptan, propionic acid, normal butyric acid, and isovaleric acid belong to the acid system, and methyl sulfide, methyl disulfide, acetaldehyde, etc. Belong.

There are chemical treatment, biological treatment, and physical treatment to remove odorous substances. Among them, the wet scrubber method is not soluble in water, but it is a method of washing odor components that react with an aqueous solution of acid or alkali or odor components that react with a specific chemical solution using an acid or alkali cleaning solution, mainly ammonia and amines. The basic component of is removed. The chemical liquid cleaning method is an acid cleaning method, an alkaline cleaning method, an oxidizing agent solution cleaning method using an oxidizing agent such as sodium hypochlorite or chlorine dioxide as an oxidizing agent, a reducing agent solution cleaning method such as sodium sulfite, or a gaseous oxidizing agent as ozone, chlorine dioxide, chlorine, etc. There are various kinds such as the oxidation method.

However, since no odor removal method is effective for all odors, the deodorization method should be selected according to the odor component, concentration, displacement, etc. Combining various odor removal methods is the most reliable method of complete deodorization. For example, the odor can be removed by combining the chemical liquid cleaning method, the ozone oxidation method and the activated carbon adsorption method in this order. For example, a deodorizing method combining the alkaline washing method and the sodium hypochlorite washing method may be used. This method uses relatively inexpensive hypochlorous acid among oxidizing agents, and removes methylmelkabutane, methyl sulfide, etc. by removing hydrogen sulfide and lower fatty acids from alkali washing and then using oxidants such as chlorine dioxide, potassium permanganate and hydrogen peroxide. .

On the other hand, in the conventional cleaning device for acid and alkali washing, after the acid washing reaction chamber and the alkali washing reaction chamber in which the medium for promoting gas-liquid contact is installed in parallel, the pickling liquid (H ₂ SO ₄ ) is pickling reaction. Indeed, alkaline rinse (NaOH) is supplied to the alkaline rinse reaction chamber and sprayed to remove basic odorous substances and acidic odorous substances from odorous substances passing sequentially through the acid washing reaction chamber and the alkali reaction chamber. In addition, the waste acid washing liquid and the waste alkali washing liquid discharged from the acid washing reaction chamber and the alkaline washing reaction chamber are mixed with each other, neutralized, and drained to prevent secondary contamination.

The deodorizers developed so far have been limited in removing odors generated from environmental foundations such as sewage treatment plants, incinerators, food waste treatment facilities, and landfills. In particular, the situation is not properly handled because it is operated by combining various methods without considering the characteristics and types of odorous substances. In particular, livestock wastewater and food waste treatment plants with high concentrations of odor are installed in a state that is too unreasonable to operate in combination with other models, causing economic loss and spatial loss due to excessive installation cost. In addition, some models in operation generate secondary pollutants, requiring another odor or secondary treatment of the by-products. In addition, the conventional acid and alkali cleaning device has a problem that the volume and complexity, the consumption of the cleaning solution is excessive, the installation cost and the operation cost are high.

On the other hand, chlorine dioxide is used as a non-chlorine disinfectant and disinfectant in the form of a water-soluble oxidizing agent that has the strongest sterilizing power after ozone and chlorine dioxide gas dissolved in the solution, and is widely used as a disinfectant disinfectant in water purification plants. In addition, chlorine dioxide has a strong oxidizing power in a wide range of pH, and particularly has the effect of oxidizing and removing phenols, amines, hydrogen sulfide and the like that causes odors in sewage treatment plants. In addition, chlorine dioxide has an advantage that can be made relatively easily by using electrolysis.

Therefore, the present inventors have a high degree of rapid oxidation apparatus that is selectively and quickly removed according to the properties of the malodorous substance in order to have a deodorization facility that can meet the defects and the practically required conditions of the conventional deodorizer and the air purifier. It is time to develop an air purifier.

The present invention has been made to solve the problems of the prior art, the main object of the present invention is to contact the aqueous solution containing the oxidizing agent and odor gas to oxidatively decompose malodorous substances, and an aqueous solution containing an acid and alkaline cleaning liquid The present invention provides an air purifying apparatus and method for maximizing processing efficiency capable of removing all basic, acidic, and neutral odorous substances by combining a chemical cleaning process that chemically neutralizes odorous substances by contacting odorous gases with a malodorous gas. .

The present invention also utilizes chlorine dioxide generated from a chlorine dioxide generator to mix methyl sulfide, methyl disulfide, acetaldehyde, etc., which can be removed by oxidative decomposition in odor gas generated from a odor generating source, in a rapid oxidation apparatus, and oxidize within a short time. Basic odorous substances such as ammonia and trimethylamine, which can be removed by acid washing using chlorine dioxide generated from the chlorine dioxide generator, are pickled and removed in an acid-cleaning reaction chamber of a vertical separation odor removing apparatus. By using caustic soda generated simultaneously from chlorine generator, acid odorous substances such as hydrogen sulfide, methyl mercaptan, propionic acid, which can be removed by alkaline washing, are removed by alkaline washing, and neutralizing acid washing liquid to remove excess deodorant Is another source of pollution It is to provide an air purifying apparatus and a method for maximizing the processing efficiency to prevent it.

In addition, the present invention provides a deodorizing device combined with an acid and alkali cleaning device and a rapid oxidation device, the treatment efficiency that can be used by circulating the aqueous solution of chlorine dioxide used as an oxidizing agent and the acid cleaning solution and the aqueous solution of caustic soda used as an alkaline cleaning solution It is to provide an air purifying apparatus and a method for maximizing.

As a means for achieving the above object, the atmospheric purification method of maximizing the treatment efficiency of the present invention is to oxidize the odorous substances that can be removed by oxidative decomposition in the odorous gas generated from the odor generating source mixed with the oxidizing agent in the rapid oxidation apparatus Process; An pickling step of washing and removing the odorous substance which can be removed by pickling in the odorous gas which has been subjected to the oxidation by washing with a pickling solution in an pickling reaction chamber; And an alkali washing step of washing the odorous substance and the excess acid washing liquid which can be removed by alkaline washing among the odor gas which has been subjected to the acid washing step by washing with an alkaline washing liquid in the alkali washing reaction chamber.

In the present invention, the oxidizing agent and the pickling liquid used in the oxidation process and the pickling process are chlorine dioxide aqueous solution using chlorine dioxide generated from the chlorine dioxide and caustic soda generator, caustic soda used in the alkali cleaning process It is characterized in that the aqueous solution of caustic soda using caustic soda generated from the chlorine and caustic soda generator.

The chlorine dioxide and caustic soda generator is characterized in that it comprises an electrolysis tank.

In a preferred embodiment of the present invention, the oxidation process is made by sprinkling or spraying a chlorine dioxide aqueous solution into the rapid oxidizing device through which the malodorous gas generated from the malodor generating source passes.

The pickling process is performed by sprinkling an aqueous solution of chlorine dioxide on the medium layer through which the malodorous gas supplied from the rapid oxidation apparatus passes.

The alkaline cleaning process is performed by sprinkling an aqueous solution of caustic soda on the medium layer through which the malodorous gas supplied from the pickling reaction chamber passes.

Another embodiment of the present invention, chlorine dioxide and caustic soda generating step of generating chlorine dioxide and caustic soda using electrolysis; Oxidation which removes odor gas which can be removed by oxidative decomposition in odor gas by spraying or spraying chlorine dioxide aqueous solution containing chlorine dioxide generated in the chlorine dioxide and caustic soda generation process to odor gas generated from odor generating source Process; The chlorine dioxide aqueous solution containing chlorine dioxide generated in the chlorine dioxide and caustic soda generating process is sprayed on the medium layer through which the odor gas flowing through the oxidation process passes to remove the odor gas which can be removed by pickling in the odor gas. Pickling process; The caustic soda solution containing caustic soda generated in the chlorine dioxide and caustic soda generation process is sprinkled on the medium layer through which the untreated malodorous gas flowing through the pickling process passes, and the malodorous gas that can be removed by alkaline washing is removed. An alkali washing step of removing; And recovering and circulating the aqueous solution of chlorine dioxide used in the oxidation process and the acid washing process and the aqueous solution of caustic soda used in the alkaline cleaning process.

In addition, the atmospheric purification apparatus maximizing the treatment efficiency according to the present invention in the atmospheric purification apparatus including a cleaning tank with an open top and bottom to clean odor gas, is coupled to one side of the cleaning tank as a cleaning tank A rapid oxidizer which sprays or sprays an oxidant to the odor gas introduced thereto to remove odor gas which can be removed by oxidative decomposition in the odor gas; The first odorous gas provided at the lower end of the cleaning tank and through which the odor gas passed through the rapid oxidizing device is formed to pass through the medium layer by the pickling liquid sprayed onto the medium layer is odor gas that can be pickled. Pickling chamber to remove; A second medium layer is provided above the pickling chamber and through which the untreated malodorous gas passed through the pickling chamber is formed, which can be removed by alkaline cleaning of the malodorous gas passing through the media layer by an alkaline cleaning solution sprayed onto the medium layer. It comprises an alkali cleaning chamber which removes odor gas and neutralizes excess pickling liquid.

In the present invention, in the middle of the cleaning tank, the untreated odor gas coming up from the pickling chamber passes and the alkaline cleaning liquid sprayed from the alkaline cleaning chamber is formed on the separator plate and the upper portion of the opening so as not to go down to the pickling chamber. It further includes a baffle cover spaced apart.

At the lower end of the cleaning tank, an pickling liquid tank for supplying pickling liquid to the pickling chamber and collecting and storing the pickling liquid discharged from the pickling chamber, and an alkaline washing liquid for supplying the alkaline cleaning liquid to the alkali cleaning chamber and discharged from the alkali cleaning chamber. Alkaline washing solution tank for storing the acid wash liquid tank is connected to the chlorine dioxide storage tank of the chlorine dioxide and caustic soda generator, the alkaline washing tank is a caustic soda storage tank of the chlorine dioxide and caustic soda generator Connected with.

The pickling liquid tank is connected to a pickling liquid spray nozzle installed in an upper portion of the first medium layer of the pickling chamber through a pickling liquid supply pipe provided with a pickling liquid supply pump, and the alkaline cleaning liquid tank is provided with an alkaline cleaning liquid supply pipe having an alkaline cleaning liquid supply pump. It is connected to the alkaline washing liquid spray nozzle installed in the upper of the second medium layer of the alkaline cleaning chamber, the pickling liquid tank is connected to the oxidant spray nozzle installed in the rapid oxidation apparatus through the pickling liquid supply pipe.

The rapid oxidizing apparatus includes a rapid mixing cylinder having a predetermined size through which a malodorous gas supplied by a blower passes, an oxidant spray nozzle installed inside the rapid mixing cylinder to inject or spray an oxidant, and an oxidizing agent in the plurality of oxidant spray nozzles. It is configured to include an oxidant supply pipe for supplying a, and a turbulence generator which is installed in the longitudinal direction inside the rapid mixing barrel to disturb the flow of odor gas.

In the present invention, the turbulence forming device comprises a fixed shaft which is installed in the longitudinal direction in the center of the rapid mixing barrel, and a plurality of disturbing wings are installed at regular intervals in the longitudinal direction on the outer peripheral surface of the fixed shaft, the neighboring An oxidant spray nozzle is installed between the disturbing blades.

The disturbing wing has a left wing for rotating the flow of malodorous gas to the left and a right wing for rotating the flow of malodorous gas to the right is provided in a symmetrical structure.

Atmospheric purification apparatus and method for maximizing the treatment efficiency according to the present invention primarily oxidize neutral systems such as methyl sulfide, methyl disulfide, acetaldehyde using chlorine dioxide, and secondly ammonia which can be removed by pickling And trimethylamine are treated with acid using chlorine dioxide, which is acidic.In addition, alkaline sulfide, methyl mercaptan, propionic acid, etc., which can be removed by alkaline washing, are alkali washed with basic caustic soda. By neutralizing and removing excess chlorine dioxide in the pickling process, the excess deodorant is prevented from becoming a secondary pollutant and has an effect of providing more improved treatment efficiency than the existing deodorizing equipment.

In addition, the present invention provides an acid and alkali cleaning device that minimizes the size of the device, and provides a rapid oxidation device that oxidizes odorous substances by quickly admixing oxidant and odor gas, chlorine dioxide used as oxidant and pickling liquid In addition to supplying caustic soda, which is used as an alkaline cleaning solution, from a single chlorine dioxide and caustic soda generator, the chlorine dioxide aqueous solution and the caustic soda solution can be circulated to reduce the installation and operating costs.

Hereinafter, with reference to the accompanying drawings will be described in detail with respect to the atmospheric purification apparatus and method for maximizing the treatment efficiency of the present invention.

Atmospheric purification device (hereinafter referred to as 'air purification device') that maximizes the treatment efficiency according to the present invention is largely chlorine dioxide and caustic soda generator 10 and rapid oxidation device 30 and vertical separation scrubber (Scrubber) It consists of 50.

The chlorine dioxide and caustic soda generator 10 generates chlorine dioxide (ClO ₂ ), which is an oxidizing agent and an acid cleaner, and caustic soda (NaOH), which is an alkaline cleaner. The rapid oxidizer 30 sprays or sprays chlorine dioxide supplied from the chlorine dioxide generator 10 to rapidly mix with the malodorous substance to remove odor gas that can be removed by oxidative decomposition such as methyl sulfide, methyl disulfide, acetaldehyde, and the like. Remove The upper and lower separation type washing apparatus 50 removes the odor gas that can be removed by pickling such as ammonia and trimethylamine by using chlorine dioxide supplied from the chlorine dioxide and caustic soda generator 10 as an acid cleaner. Caustic soda (NaOH) supplied from the generator 10 is used as an alkali cleaner to remove hydrogen sulfide, methyl mercaptan, propionic acid, and the like.

1 is a schematic diagram showing an atmospheric purification method (hereinafter, referred to as an 'high deodorization method') that maximizes treatment efficiency according to the present invention.

As shown, the highly deodorizing method of the present invention uses an oxidizing agent such as chlorine dioxide to oxidatively decompose malodorous gases (neutral malodorous substances) that can be removed by oxidative decomposition such as methyl sulfide, methyl disulfide, acetaldehyde, and the like. (S110), an acid washing step (S120) of removing an odor gas (eg, basic odor substance) which can be removed by acid washing, such as ammonia and trimethylamine, using an acid cleaner such as chlorine dioxide, and caustic soda (NaOH). An alkaline cleaning process 130 is used to remove odor gases (eg, acid odor substances) that can be removed by alkaline cleaning, such as hydrogen sulfide, methyl mercaptan, propionic acid, and the like using an alkaline cleaner.

As shown, the oxidizing agent and the pickling liquid used in the oxidation process (S110) and the pickling process (S120) use an aqueous chlorine oxide solution in which chlorine dioxide generated in the chlorine dioxide and caustic soda generation process (S150) is dissolved in water. . In addition, the alkaline cleaning solution used in the alkaline cleaning step (S130) uses an aqueous solution of caustic soda dissolved in water the caustic soda generated in the chlorine dioxide and caustic soda generation step (S150).

In this case, the chlorine dioxide aqueous solution is sequentially supplied to the pickling process (S120) and the oxidation process (S110), and the chlorine dioxide aqueous solution supplied to the pickling process (S120), the oxidation process (S120) and the alkali cleaning process (S130) and The caustic soda solution is continuously circulated and reused, providing additional chlorine dioxide and caustic soda when chlorine dioxide, pH or ORP falls below the standard.

Next, Figure 2 is a block diagram showing a chlorine dioxide and caustic soda generator 10 that can be preferably applied to the atmospheric purification apparatus maximizing the treatment efficiency according to the present invention.

As shown, the chlorine dioxide and caustic soda generator 10 (hereinafter referred to as 'chlorine dioxide generator'), sodium chlorite tank (1), brine tank (2), water softener (3), electrolysis It consists of a bath (4) and a chlorine dioxide storage tank (5) and a caustic soda storage tank (6).

The sodium chlorite tank 1 supplies an aqueous solution of sodium chlorite (NaClO ₂ ) which is a raw material to the cation region of the electrolysis tank 4. The water softener 3 and the brine tank 2 supply water as a raw material and brine as an electrolytic accelerator to the anion region of the electrolysis tank 4.

Sodium chlorite, water and brine supplied to the electrolysis tank 4 are electrolyzed by a predetermined voltage applied. The cation exchange membrane 49 positioned between the cation region and the anion region of the electrolysis tank 4 generates chlorine dioxide (ClO ₂ ) having a pH of 3.5 or less in the cation region, and a cation exchange membrane 41 in the anion region. sodium ion (Na ⁺⁾ and hydroxyl ions (OH ^-) are passed through the binding to pH10 or more caustic (NaOH) is generated.

A schematic reaction scheme of the reaction occurring in the electrolysis tank 4 of the chlorine dioxide generator 10 is as follows.

Cationic Anode: NaClO ₂ → Na ^{+ +} ClO ₂ ^-

Anion area _{(Cathode): H 2 O →} H + + OH -

Finally, the chlorine dioxide generated in the electrolysis tank 4 is stored in the chlorine dioxide storage tank 5 and caustic soda is stored in the caustic soda storage tank 6. As described above, the chlorine dioxide generator 10 of the present invention removes all of the odorous substances of neutral, acidic, and basic because chlorine dioxide, which is an oxidizing agent and an acid cleaner, and caustic soda, which is an alkaline cleaner, are generated at the same time. It can be preferably used in the atmospheric purification device for.

Hereinafter, the vertical separation cleaning device 50 and the rapid oxidation apparatus 30 according to the present invention will be described with reference to FIGS. 3 to 5.

3 is a schematic view showing a vertical separation cleaning apparatus 50 and a rapid oxidation apparatus 30 according to the present invention, and FIGS. 4 and 5 are side and sectional views showing the rapid oxidation apparatus 30 according to the present invention. .

As shown, the upper and lower separation type washing apparatus 50 is formed by separating the washing tank 51 of a predetermined size up and down to separate the alkali cleaning chamber 24 in the upper portion and the pickling chamber 23 in the lower portion. will be. As described above, the vertical separation cleaning device 50 of the present invention can minimize the installation area by installing the pickling chamber 23 and the alkali cleaning chamber 24 up and down.

To this end, the upper end of the cylindrical cleaning tank 51 is open to discharge the processing gas, the lower end is open so that the acid or alkaline cleaning liquid flows down. Preferably, the upper end of the cleaning tank 51 to reduce the diameter so that the communication to facilitate the discharge of the processing gas is formed. In addition, a separator 17 partitioning the pickling chamber 23 and the alkali washing chamber 24 is installed in the center of the washing tank 51. The separation plate 17 prevents the alkaline cleaning liquid of the alkaline cleaning chamber 24 from flowing into the pickling chamber 23, and the malodorous gas of the pickling chamber 23 can be introduced into the alkaline cleaning chamber 24.

In the lower portion of the washing tank 51, an acid washing liquid tank 54 for storing and circulating an acid washing liquid (chlorine dioxide aqueous solution) and an alkali washing liquid tank 56 for storing and circulating an alkaline washing liquid (aqueous sodium hydroxide solution) are circumscribed. Is installed. Preferably, the washing tank 51 is installed at an upper portion between the pickling tank 54 and the alkaline washing tank 56 so that the alkaline washing liquid flowing down from the washing chamber 24 of the washing tank 51 is washed with an alkali washing tank. 56), the pickling liquid flowing down from the pickling chamber 23 is allowed to naturally flow into the pickling liquid tank (54).

And chlorine dioxide storage tank (5) is connected to the pickling liquid tank (54) so that the chlorine dioxide can be supplied through the chlorine dioxide supply pipe (7) provided with a plurality of control valves and pumps. Caustic soda storage tank (6) is connected to the alkaline washing liquid tank (56) so that the caustic soda can be supplied through the caustic soda supply pipe (8) provided with a plurality of control valves and pumps.

Subsequently, the pickling chamber 23 includes a first medium layer 16 therein, and a pickling liquid spray nozzle 20 for sprinkling the pickling liquid on the upper portion of the first medium layer 16. The first medium layer 16 is formed by stacking a medium having a predetermined size on a porous plate at a predetermined height. The first medium layer 16 reduces the inflow rate of the malodorous gas flowing into the pickling chamber 23 and increases the reaction time by increasing the contact time and the contact area with the pickling liquid. The pickling liquid spray nozzle 20 is connected to the pickling liquid tank 54 and is supplied with pickling liquid through a pickling liquid circulation pipe 27 provided with an oxidant and a pickling liquid circulation pump 13.

Therefore, when the malodorous gas flows into the lower portion of the pickling chamber 23, the malodorous gas reacts with the pickling liquid sprayed from the pickling liquid spray nozzle 20 while rising through the first medium layer 16 to react with ammonia and trimethyl. Basic odor gas, such as an amine, is removed. The malodorous gas which has not been treated in the pickling chamber 23 flows into the alkali cleaning chamber 24 through the separation plate 17. And the pickling liquid used in the pickling chamber 23 is discharged to the pickling liquid tank 54 through the pickling liquid discharge pipe 59. At this time, a part of the pickling liquid sprayed into the pickling chamber 23 may be introduced into the alkali cleaning chamber 24 through the separator 17 together with the untreated malodorous gas.

The separation plate 17 separates the pickling chamber 23 and the alkali cleaning chamber 24, but is provided with an opening 25 through which malodorous gas and surplus oxidizing gas pass in an untreated center. In addition, a baffle cover 18 is formed at the upper portion of the separation plate 17 to induce a uniform flow of gas flowing into the alkali cleaning chamber 24 through the opening 25 and to be evenly distributed into the alkali cleaning chamber 24. ) Is provided.

Preferably, a vertical wall is formed at a predetermined height upward at an edge of the opening 25 formed in the separation plate 17, and a vertical wall of a predetermined length is formed at a lower edge of the baffle cover 18, The separation plate 17 and the baffle cover 18 are spaced apart from each other so that a passage is formed at a predetermined interval between the vertical wall of the opening 25 and the vertical wall of the baffle cover 18. Excess oxidizing gas is introduced into the alkali cleaning chamber 24, and the alkaline cleaning liquid injected from the alkali cleaning chamber 24 is not introduced into the pickling chamber 23. And one side of the separation plate 17 is provided with an alkaline cleaning liquid discharge pipe 58 for discharging the alkaline cleaning liquid used in the alkali cleaning chamber 24 to the alkaline cleaning tank 56.

On the other hand, a second medium layer 26 is provided in the center of the alkali cleaning chamber 24, and an alkaline washing liquid spray nozzle 21 for sprinkling the alkaline cleaning liquid is provided on the upper portion of the second medium layer 26. The second medium layer 26 is formed by stacking a medium having a predetermined size on a porous plate at a predetermined height. The medium can be applied to any kind as long as it is not reactive with the cleaning liquid. The second medium layer 26 reduces the inflow rate of the malodorous gas and the surplus oxidizing gas flowing into the alkali cleaning chamber 24 and increases the contact time and the contact area with the alkaline detergent, thereby increasing the reaction efficiency. The alkaline washing liquid spray nozzle 21 is connected to the alkaline washing liquid tank 56 and is supplied with an alkaline washing liquid through an alkaline washing liquid circulation pipe 29 provided with an alkaline washing liquid circulation pump 12.

Therefore, when the untreated malodorous gas and surplus oxidizing gas flow into the lower portion of the alkali cleaning chamber 24 through the passage between the separating plate 17 and the baffle cover 18, the untreated malodorous gas and surplus oxidizing gas flow into the second medium layer ( During the ascension through 26), the alkaline rinse liquid sprayed from the alkaline rinse liquid spray nozzle 21 neutralizes acidic odorous gases such as hydrogen sulfide, methyl mercaptan, propionic acid and surplus oxidizing gas.

As described above, the upper and lower separation type washing apparatus 50 according to the present invention neutralizes the surplus oxidizing gas remaining in the pickling chamber 23 or the rapid oxidizing apparatus 30, that is, chlorine dioxide, to prevent secondary contamination by the oxidizing gas. prevent. Finally, the processing gas processed in the alkali cleaning chamber 24 is discharged to the outside through the demister 19 provided in the upper portion of the alkali cleaning chamber 24. The thermistor 19 removes moisture contained in the processing gas so that moisture is not released to the outside.

As described above, the vertical separation type washing apparatus 50 of the present invention is installed separately so that the pickling chamber 23 and the alkali washing chamber 24 are positioned up and down inside one washing tank 51. By installing the pickling liquid tank 54 and the alkaline washing liquid tank 56 adjacent to the lower part, the size of the cleaning device is minimized and the sprinkling and circulation of the pickling liquid and the alkaline washing liquid are naturally performed.

In addition, the present invention uses the chlorine dioxide and caustic soda generated in one chlorine dioxide and caustic soda generator 10 as an acid cleaner and an alkaline cleaner, and the excess oxidant gas generated in the acid washing process to the alkali cleaning By neutralizing in the process, secondary contamination can be prevented.

As described above, when the vertical separation washing apparatus 50 of the present invention is used, basic odorous substances such as ammonia and trimethylamine are removed in the pickling chamber 23, and hydrogen sulfide and methyl mercaptan in the alkaline washing chamber 24. And acid odor substances such as propionic acid can be removed. However, neutral malodorous substances contained in malodorous gases such as methyl sulfide, methyl disulfide, acetaldehyde and the like cannot be removed only by acid washing and alkali washing.

Accordingly, the advanced malodor processing apparatus of the present invention rapidly oxidizes neutral odorous substances such as methyl sulfide, methyl disulfide, acetaldehyde, etc. by spraying or spraying chlorine dioxide as an oxidant on the odor gas flowing into the upper and lower separation type washing apparatus 50. Rapid oxidation device 30 is further provided.

3 to 5, the rapid oxidation apparatus 30 is a rapid mixing barrel 35 consisting of a cylindrical or rectangular cylinder of a predetermined size horizontally installed on one side of the vertical separation washing apparatus 50. And a plurality of oxidant injection nozzles 31 for injecting or spraying a chlorine dioxide containing liquid into the rapid mixing barrel 35, and an oxidant supply pipe 34 for supplying oxidants to the plurality of oxidant injection nozzles 31. It is composed.

And the plurality of oxidant supply pipe 34 is connected to the pickling liquid tank 54 through the main oxidant supply pipe 36, and pickling liquid through the pickling liquid circulation pipe 27 provided with the oxidant and the pickling liquid circulation pump 13 To be supplied. At this time, between the main oxidant supply pipe 36 and the pickling liquid circulation pipe 27 may be provided with a pickling liquid spray nozzle 20 for spraying the pickling liquid. In this way, the structure of the overall apparatus can be simplified by supplying the oxidizing agent and the pickling liquid through one pickling liquid tank 54 and the pickling liquid circulation pipe 27. However, the main oxidant supply pipe 36 may be directly connected to the pickling liquid circulation pipe 27 or directly to the pickling liquid tank 54.

Meanwhile, a blower 22 for supplying malodorous gas into the rapid mixing vessel 35 is installed at the front end of the rapid oxidation apparatus 30, and supplied by the blower 22 inside the rapid mixing vessel 35. A turbulence former 40 is further provided to disturb the flow of the malodorous gas to promote the reaction between the oxidant and the malodorous substance.

As shown in Figure 4 to 8, the turbulence generator 40 is installed in the longitudinal direction inside the rapid mixing cylinder 35 to disturb the flow of odor gas flowing along the rapid mixing cylinder (35). The turbulence former 40 has a fixed shaft 41 which is installed in the longitudinal direction at the center of the rapid mixing cylinder 35, and a plurality of disturbing wings are installed at regular intervals in the longitudinal direction on the outer peripheral surface of the fixed shaft 41 It consists of 44. At this time, the neighboring disturbing wings 44 are rotated so as to have the same rotation angle about the fixed shaft 41 so that the plurality of disturbing wings 44 are installed at equal intervals.

In addition, the disturbing wing 44 is preferably provided with a pair of wings (42, 43) symmetrically around the fixed axis (41). For example, the disturbing wing 44 is composed of an angle having an angle between the two surfaces of 120 °, the left wing 42 and the right wing 43 opposite the installation direction, the left wing 42 is The flow of the malodorous gas is induced to rotate to the left side, and the right wing 43 installed on the opposite side promotes the flow of the malodorous gas to the right to promote the mixing with the oxidant.

Therefore, since the oxidant is injected or sprayed from the plurality of oxidant spray nozzles 31 installed inside the rapid mixing tank 35 in a state where the flow of the odor gas is disturbed by the turbulence generator 40, the oxidant may be contacted with a short time. And odor gas react to remove neutral odor substances such as methyl sulfide, methyl disulfide, acetaldehyde and the like contained in the odor gas.

Subsequently, the neutral odorous substance reacts with the oxidized malodorous gas and the malodorous substance, and the remaining oxidant flows into the pickling chamber 23 communicated with the rear end of the rapid mixing vessel 35. The liquid oxidant introduced into the pickling chamber 23 is recovered to the pickling liquid tank 59 through the pickling liquid discharge pipe 59. In this case, some gaseous oxidant may be introduced into the first medium layer 16 of the pickling chamber 23 and used as the pickling liquid.

As shown in Figure 8, the rapid oxidation apparatus 30 of the present invention may be formed in a rectangular cylinder. When the rapid mixing barrel 35 has a rectangular shape, the oxidant supply pipe 34 installed in the plurality of oxidant injection nozzles 31 also has a square ring shape.

On the other hand, in the drawings of Figures 5 to 8 is shown that only the oxidant supply pipe 34 is installed inside the rapid mixing barrel 35, but only the oxidant injection nozzle 31 is installed inside the oxidant supply pipe 34 is rapid mixing It is also possible to install outside the cylinder 35. In addition, although the rear end of the rapid mixing barrel 35 is directly connected to one side of the acid chamber 23 may be connected in other ways. In addition, although the rapid mixing barrel 35 is arranged horizontally, it is also possible to arrange it to have a different direction or angle.

As described above, the air purifying apparatus and method thereof according to the present invention oxidize and remove neutral odor gas such as methyl sulfide, methyl disulfide, acetaldehyde and the like contained in the odor gas primarily in the rapid oxidation apparatus 30. Then, it is introduced into the vertical separation washing apparatus 50 to remove basic and acidic odor gas.

That is, the odor gas introduced into the upper and lower separation type washing apparatus 50 first reacts with the pickling liquid in the pickling chamber 23 to remove the odor gas (eg, basic odor substance) which can be removed by pickling such as ammonia and trimethylamine. Remove Then, the untreated malodorous gas which has been subjected to the pickling process and the remaining oxidizing gas reacted during the oxidation and the pickling process are supplied to the alkali cleaning chamber 24. In the alkali cleaning chamber 24, an odor gas (eg, an acid odor substance) that can be removed by alkaline cleaning, such as hydrogen sulfide, methyl mercaptan, propionic acid, etc., is removed through an alkali washing process, and the excess oxidant gas is neutralized and removed.

On the other hand, the pickling liquid tank 54 is provided with a pH / ORP measuring device 14 and a chlorine dioxide measuring device (15). The pH / ORP measuring device 14 and the chlorine dioxide measuring device 15 may be supplied with chlorine dioxide from the chlorine dioxide storage tank 5 when the concentration of chlorine dioxide falls below a reference value through an acid washing and oxidation process. To operate multiple valves and pumps. In addition, the alkaline cleaning liquid tank 56 is also provided with a pH / ORP measuring device (14). The pH / ORP measuring device 14 also sends a control signal to receive caustic soda from the caustic soda storage tank 6 when the concentration of caustic soda falls below an appropriate level during the treatment process. To this end, the atmospheric purification device of the present invention is provided with a control device for operating various control valves and pumps according to the concentration of chlorine dioxide and caustic soda.

As described above, the present invention not only sequentially removes all kinds of odorous substances contained in the odor gas while passing through the rapid oxidation device 30 and the vertical separation cleaning device 50, and also the upper portion of the cleaning tank 51. It is discharged in a state where water is removed through the demister 19 installed in the.

1 is a schematic configuration diagram showing an atmospheric purification method of maximizing treatment efficiency according to the present invention;

2 is a block diagram showing an example of chlorine dioxide and caustic soda generating means applied to the atmospheric purification apparatus and method maximizing the treatment efficiency according to the present invention,

3 is a block diagram showing an atmospheric purification apparatus maximizing the treatment efficiency according to the present invention,

4 and 5 are cross-sectional views showing a rapid oxidation apparatus installed in the atmospheric purification apparatus according to the present invention,

Figure 6 is a perspective view showing an example of the turbulence generator applied to the rapid oxidation apparatus of the present invention,

7 is a cross-sectional view showing another embodiment of a rapid oxidation apparatus according to the present invention.

**** Description of the symbols for the main parts of the drawings ****

1: sodium chlorite tank 2: brine tank

3: water softener 4: electrolysis bath

5: chlorine dioxide storage tank 8: caustic soda storage tank

10: Chlorine dioxide and caustic soda generator 12: Alkaline wash liquid circulation pump

13: oxidant and pickling circulating pump 16: first medium layer

17: Separator 18: Baffle Cover

20: acid washing liquid spray nozzle 21: alkaline washing liquid spray nozzle

22: blower 23: pickling room

24: alkali cleaning chamber 25: opening

27: acid wash liquid circulation tube 29: alkaline wash liquid circulation tube

30: rapid oxidation apparatus 31: oxidant injection nozzle

34: oxidant supply pipe 35: rapid mixing barrel

40: turbulence period 44: disturbing wings

50: vertical separation washing device 51: cleaning tank

54: Pickling liquid tank 56: Alkaline washing liquid tank

Claims (14)

An oxidation step of removing odorous substances which can be removed by oxidative decomposition of odorous gases generated from odorous sources by mixing with an oxidizing agent in a rapid oxidation apparatus; An pickling step of washing and removing the odorous substance which can be removed by pickling in the odor gas which has undergone the oxidation fixation by pickling in a pickling reaction chamber; In the atmospheric cleaning method comprising an alkaline washing step of removing the odorous substance and the excess acid washing liquid which can be removed by alkaline washing in the odor gas which has passed through the pickling process by washing with an alkaline washing liquid in an alkali washing reaction chamber, The oxidizing agent and acid detergent used in the oxidation process and the acid washing process, and the alkaline cleaning liquid used in the alkali cleaning process are each prepared using chlorine dioxide and caustic soda generated from a chlorine dioxide and caustic soda generator including an electrolysis tank. Atmospheric purification method maximizing the treatment efficiency, characterized in that the aqueous solution of chlorine dioxide and aqueous solution of caustic soda. delete delete The method of claim 1, The oxidation process is a method of maximizing the treatment efficiency, characterized in that the chlorine dioxide aqueous solution is sprayed or sprayed into the interior of the rapid oxidizing device through which the odor gas generated from the odor generating source passes. The method according to claim 1 or 4, The pickling process is a method of maximizing the treatment efficiency, characterized in that the chlorine dioxide aqueous solution is sprayed on the medium layer through which the malodorous gas supplied from the rapid oxidizer passes. The method of claim 5, The alkaline cleaning process is a method of maximizing the treatment efficiency, characterized in that the aqueous solution of caustic soda is sprayed on the medium layer through which the odor gas supplied from the pickling reaction chamber passes. Chlorine dioxide and caustic soda generating step of generating chlorine dioxide and caustic soda using electrolysis; Oxidation which removes odor gas which can be removed by oxidative decomposition in odor gas by spraying or spraying chlorine dioxide aqueous solution containing chlorine dioxide generated in the chlorine dioxide and caustic soda generation process to odor gas generated from odor generating source Process; The chlorine dioxide aqueous solution containing chlorine dioxide generated in the chlorine dioxide and caustic soda generating process is sprayed on the medium layer through which the odor gas flowing through the oxidation process passes to remove the odor gas which can be removed by pickling in the odor gas. Pickling process; The caustic soda solution containing caustic soda generated in the chlorine dioxide and caustic soda generation process is sprinkled on the medium layer through which the untreated malodorous gas flowing through the pickling process passes, and the malodorous gas that can be removed by alkaline washing is removed. An alkali washing step of removing; Recovering and circulating the aqueous solution of chlorine dioxide used in the oxidation process and the acid washing process and the aqueous solution of caustic soda used in the alkaline cleaning process. In the atmospheric purification device comprising a cleaning tank of the top and bottom open to clean the malodor gas, A rapid oxidizer coupled to one side of the cleaning tank to inject or spray an oxidant into the odor gas flowing into the cleaning tank to remove the odor gas which can be removed by oxidative decomposition in the odor gas; The first odorous gas provided at the lower end of the cleaning tank and through which the odor gas passed through the rapid oxidizing device is formed to pass through the medium layer by the pickling liquid sprayed onto the medium layer is odor gas that can be pickled. Pickling chamber to remove; A second medium layer is provided above the pickling chamber and through which the untreated malodorous gas passed through the pickling chamber is formed, which can be removed by alkaline cleaning of the malodorous gas passing through the media layer by an alkaline cleaning solution sprayed onto the medium layer. An alkali cleaning chamber which removes odor gas and neutralizes excess acid wash liquid; Including the chlorine dioxide and caustic soda generator for generating chlorine dioxide and caustic soda by using electrolysis to supply the chlorine dioxide aqueous solution to the rapid oxidation device and the pickling chamber, the aqueous solution of caustic soda to the alkaline cleaning chamber. Atmospheric purification apparatus maximizing processing efficiency, characterized in that configured. The method of claim 8, In the middle of the cleaning tank, an untreated malodorous gas coming up from the pickling chamber passes and an alkaline cleaning liquid sprayed from the alkaline cleaning chamber is formed so as to be separated from the separation plate and an upper part of the opening so that the alkaline washing liquid does not go down to the pickling chamber. Atmospheric purification apparatus maximizing processing efficiency, characterized in that the cover further comprises. delete delete In the atmospheric purification device comprising a cleaning tank of the top and bottom open to clean the malodor gas, A rapid oxidizer coupled to one side of the cleaning tank to inject or spray an oxidant into the odor gas flowing into the cleaning tank to remove the odor gas which can be removed by oxidative decomposition in the odor gas; The first odorous gas provided at the lower end of the cleaning tank and through which the odor gas passed through the rapid oxidizing device is formed to pass through the medium layer by the pickling liquid sprayed onto the medium layer is odor gas that can be pickled. Pickling chamber to remove; A second medium layer is provided above the pickling chamber and through which the untreated malodorous gas passed through the pickling chamber is formed, which can be removed by alkaline cleaning of the malodorous gas passing through the media layer by an alkaline cleaning solution sprayed onto the medium layer. An alkali cleaning chamber for removing odor gas and neutralizing excess pickling liquid; The rapid oxidizing apparatus includes a rapid mixing cylinder having a predetermined size through which a malodorous gas supplied by a blower passes, an oxidant spray nozzle installed inside the rapid mixing cylinder to inject or spray an oxidant, and an oxidizing agent in the plurality of oxidant spray nozzles. An oxidant supply pipe for supplying the air purifying efficiency, characterized in that it is installed in the longitudinal direction of the inside of the rapid mixing barrel and configured to include a turbulence generator to disturb the flow of odor gas. The method of claim 12, The turbulence forming device includes a fixed shaft installed in the longitudinal direction at the center of the rapid mixing barrel, and a plurality of disturbing wings installed at regular intervals in the longitudinal direction on the outer circumferential surface of the fixed shaft, the oxidizing agent between neighboring disturbing wings Atmospheric purification apparatus maximizing processing efficiency, characterized in that the injection nozzle is installed. The method of claim 12, The disturbing wing has a left wing for rotating the flow of malodorous gas to the left and the right wing for rotating the flow of malodorous gas to the right is characterized in that the air purification apparatus maximizing the treatment efficiency.

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