KR20070099823A - Offensive odor treatment apparatus using chlorine dioxide - Google Patents

Abstract

A method for removing malodor is provided to remove a malodorous material fundamentally, by generating activated chlorine dioxide and directly inputting the activated chlorine dioxide into the malodorous material. A sodium chlorite or a sodium hypochlorite is chemically reacted with hydrochloric acid to generate chlorine dioxide. The chlorine dioxide is enriched in water to obtain a chlorine dioxide-enriched solution through an ejector block. The chlorine dioxide-enriched solution is promptly transferred through a storage tank having circular screw type flow or stepwise flow for inducing fast flow so as to first exhaust first generated chlorine dioxide. A vesicle water supplying line is connected to a chlorine dioxide solution supplying line so that the chlorine dioxide solution is dispersed into vesicle water by using absorption of the ejector due to a pressure difference between the vesicle water and the chlorine dioxide solution. The vesicle water, where the chlorine dioxide solution is dispersed, is sprayed and inputted into malodor generators.

Description

Offensive odor treatment apparatus using chlorine dioxide

1: Process odor removal process of the present application using chlorine dioxide (ClO ₂ )

2a: Illustrated storage tank having a skewed rotary pipe

2b: Illustrated storage tank having a zigzag flow guide plate

3: Example of grafting chlorine dioxide to the parcel water supply line

Due to the rapid industrialization and the improvement of living standard, the quality of life of mankind is getting better and getting better and well being, but the natural environment of the earth is desolate day by day.

The amount of waste, wastewater and household waste flowing out from each household and industry is increasing day by day, and the degree of pollution is increasing day by day. As these pollutants enter rivers and oceans, the water quality worsens, food waste disposal facilities, and various wastes. Household wastes such as treatment facilities are flooded, and the treatment facilities for treating them are recognized as hate facilities due to odors and harmful gas generation. These hate facilities cause many complaints due to local complaints and collective self-interest, Today's reality is that we can't find a place to establish.

Odor-generating facilities are generated at home and industrial sites such as sewage treatment plant, manure treatment plant, livestock manure treatment plant, restaurant, waste treatment plant, slaughterhouse, and other chemical manufacturing plant. , Methyl mercaptan, methyl sulfide, methyl disulfide, amines, acetaldehyde, etc. have been found, but the actual odor causing agents are much higher and there are hundreds of odorous substances.

Therefore, in order to remove odorous substances generated from various pollutants as described above, various removal technologies are required according to various factors by causes of occurrence and place of occurrence. Therefore, research has been conducted in a wide range of parts. Looking at the representative technologies that are disclosed or studied as a technology,

1) the technical field to use the Bio-Filter to remove odor gas by microorganisms nourishing odor component,

2) the technical field of the soil deodorization method to remove odorous substances by natural decomposition by microorganisms and adsorption of soil particles by passing malodorous gas through the soil layer;

3) the technical field of water washing to neutralize the malodor generating substance with acid or basic substance to remove the malodorous substance,

4) the technical field related to the adsorption method for adsorption and removal of odor-causing substances using an adsorbent such as activated carbon,

5) the technical field of the masking method to remove odorous substances using the fragrance of aromatic substances,

6) The ozone oxidation method for oxidizing and decomposing odorous substances by using the oxidation of ozone is known.

The present application is a method for solving the odor occurrence problems occurring in various aversive facilities as described above by activating chlorine dioxide (NaClO ₂ ) or sodium hypochlorite (NaClO) by chemical reaction with hydrochloric acid (HCl) The present invention relates to a technique for generating ClO ₂ ) and rapidly removing the malodorous substances by contacting the malodorous sources.

Chlorine dioxide is a non-chlorine disinfectant and disinfectant. It has the strongest sterilizing power and bleaching power after ozone, and is used in the form of water-soluble oxidizing agent in which chlorine dioxide gas is dissolved in the solution.

In addition, chlorine dioxide has a strong oxidizing power over a wide range of pH, and in particular, the deodorizing effect is excellent in the oxidative removal of phenols, amines, hydrogen sulfide, etc. that cause odors in sewage treatment plants.

Chlorine dioxide (ClO ₂ ) exists in the form of a radical in the gas phase at room temperature. Chlorine dioxide has two types of stabilized chlorine dioxide and activated chlorine dioxide. Stabilized chlorine dioxide is a buffer solution in the form of carbonate and phosphate. The effect is shown as chlorine, and chlorine dioxide (ClO ₂ ) causes side reactions during long-term storage, and by-products such as carcinogens are generated and contained. In the case of using oxidizing power or deodorizing power of chlorine, stabilizing chlorine dioxide was used to perform the activation process again at the site of use.

Activated chlorine dioxide has low water solubility and severe change over time, which makes it difficult to store and has a problem of being easily decomposed by light, so its use is extremely limited.

The present invention obtains chlorine dioxide (ClO ₂ ) concentrate by using an ejector block in order to concentrate the chlorine dioxide (ClO ₂ ) generated through the chlorine dioxide generator using a chemical reaction, so that the chlorine dioxide produced first is discharged first It has a technical idea to remove odors by contacting odor generating sources by transferring them to the odor generating source reactor through a storage tank having a circular screw type or a stepped flow which induces a rapid flow.

In addition, in the present application, the generated chlorine dioxide is used locally to increase the odor removal effect in the entire contents without remaining only in partial effects, to the parcel water supply line for removing air bubbles generated in the odor source reaction tank. By grafting the supply line of the chlorine dioxide solution, the chlorine dioxide (ClO ₂ ) solution is used as a defoaming device by using the ejector principle due to the differential pressure of the parcel water supply line and the chlorine dioxide solution supply line, which are transferred at high pressure. It has the purpose of the technical problem and the invention to maximize the effect of the use of chlorine dioxide by injection injection.

Chlorine dioxide (ClO ₂ ) has been used as a disinfectant and disinfectant in the food processing industry as a representative disinfectant, and has been widely used as a disinfectant and drinking water treatment in the wastewater treatment industry.

Chlorine dioxide shows high reaction properties for certain substances, such as sulfur, amines, melcaptans, and cyanide, and gel deodorants containing chlorine dioxide are commercially available.

In the present invention, even in the case of using an expensive electrolytic chlorine dioxide generator to use stabilized chlorine dioxide in the conventional water treatment field, chlorine dioxide (ClO ₂ ) causes side reactions such as chlorate (ClO ₃ −) when stored for a long time. It is a chemical reaction type chlorine dioxide generator that can solve the problem of a large amount of by-products, and also solve the problem that activated chlorine dioxide has low water solubility and severe change over time, which makes it difficult to store. The present invention provides a method and apparatus for removing odor using chlorine dioxide (ClO ₂ ) having a system capable of quickly transferring chlorine dioxide generated simultaneously with a treatment object.

The present invention is a method for removing odor from various odor sources in various industrial sites, chlorine dioxide (ClO ₂ ) through the chemical reaction of sodium chlorite (NaClO ₂ ) or sodium hypochlorite (NaClO) with hydrochloric acid (HCl). Generating a first step; A second step of obtaining a concentrated solution of chlorine dioxide (ClO ₂ ) through an ejector block to concentrate the generated chlorine dioxide (ClO ₂ ) in water; A third step of rapidly transferring the chlorine dioxide (ClO ₂ ) solution of the second step through a storage tank having a circular screw or stepped flow to induce a rapid flow so that the chlorine dioxide produced first is discharged first; It includes, and the supply of vesicle water supply line and chlorine dioxide solution to be transported at high pressure by grafting the supply line of the chlorine dioxide solution of the third step to the vesicle water supply line for removing the bubbles generated in the odor source reaction tank Disclosed is a odor removal method comprising the step of injecting chlorine dioxide (ClO ₂ ) solution into the odor generating source using a defoaming device using the ejector absorption principle due to the differential pressure of the line.

In addition, the technical idea of the present application is not limited to the use of chlorine dioxide (ClO ₂ ), and to remove the odor from the odor source of various industrial sites odor generating source reaction tank having an oxidizing power or sterilizing power or disinfection function As a method for reducing odor by applying to the vesicle water supply line and the drug substance transported at high pressure by incorporating the supply line of the drug substance to the parcel water supply line for removing air bubbles generated in the odor source reaction tank By using the ejector principle due to the differential pressure of the supply line it can be implemented to remove the odor comprising the step of spraying the medicinal substances with the parcel water to the odor generating source.

In addition, the technical idea of the present application in the odor removal device using chlorine dioxide (ClO ₂ ) to remove the odor of the industrial field, sodium chlorite (NaClO ₂ ) or sodium hypochlorite (NaClO), such as hydrochloric acid (HCl) Means for generating gaseous chlorine dioxide (ClO ₂ ) through a chemical reaction with; means for obtaining chlorine dioxide (ClO ₂ ) concentrate using an ejector block to concentrate the generated chlorine dioxide (ClO ₂ ) in water, the dioxide Means for rapid transfer of chlorine (ClO ₂ ) solution using a circular screw or stepped flow tank to induce rapid flow so that the chlorine dioxide produced first is discharged first. Parcel water supply line and chlorine dioxide for high pressure transported by grafting the chlorine dioxide solution supply line to the parcel water supply line for By using the ejector absorption principle due to the differential pressure of the liquid supply line can provide a odor removing device comprising a means for spraying the chlorine dioxide (ClO ₂ ) solution into the odor generating source using a defoaming device.

The specific embodiments of the technical idea of the present application will be disclosed through the accompanying drawings as the technical configuration for describing the technical idea of the present invention.

In the present Figure 1 and to obtain the activated chlorine dioxide (ClO ₂₎ to be used in the present application, to absorb it to the water, chlorine dioxide (ClO ₂₎ creates a solution, made of a chlorine dioxide (ClO ₂₎ The solution was first produced chlorine dioxide Figure 1 shows the flow process diagram to be applied to the reaction target by quickly transferring through the storage tank to induce a rapid flow to discharge the first.

Chlorine dioxide (ClO ₂ ) is generated by using the flow of [A] in the dashed line in the process chart. Referring to an embodiment for illustrating a specific application example, 15% hydrochloric acid in a chlorine dioxide generator is described. (HCl) 1 volume ratio with 12% tea acid soda (NaClO) was reacted with 2 volume ratio to produce a Cl ₂ gas where 27% hypochlorite soda (NaClO ₂₎ were mixed in a 1.5 volume ratio of a method of generating ClO ₂ gas proposed in Can be.

Referring to the process of generating the chlorine dioxide gas in more detail, the pressure sensor is installed in the chlorine dioxide generator is hydrochloric acid (HCl) and hypochlorite by using a change in the pressure sucked into the ejector block according to the change in the water supply amount ( NaClO), sodium chlorite (NaClO ₂ ) by varying the input amount of water and chemicals to adjust the supply of the chlorine dioxide can be generated in a certain concentration and yield even if the pressure changes, for example, When the water flow rate is 20 l / min and the pressure is -10 kg / cm 2, 15% hydrochloric acid 20ml / min, 12% sodium hypochlorite 40ml / min, 27% sodium chlorine 30ml / min When introduced at each flow rate, the concentration of chlorine dioxide (ClO ₂ ) is 4100 mg / l and purity is 95.5%.

In another embodiment, when the water flow rate is 40 l / min and the pressure is -40 kg / cm 2, 15% hydrochloric acid 40ml / min, 12% sodium hypochlorite 80ml / min, 27% sodium chlorine 60 Injecting at the respective flow rate of ㎖ / min it can be seen that the concentration of chlorine dioxide (ClO ₂ ) is 4050mg / ℓ, purity is 94.8%, based on the above data, the pressure control valve of the chemical pressure -10㎏ / When the pressure is -1, adjust the initial supply and increase the chemical supply flow rate by 3.3% each time the pressure rises by -1.When the pressure is -40㎏ / ㎠, set the chemical supply amount to be supplied at a flow rate of 200% compared to the initial supply. Chlorine dioxide generator can be provided to obtain a constant yield of chlorine dioxide even if (water flow rate) changes, and pressure (differential pressure, negative pressure) sensor is installed in the chlorine dioxide generator to vary the amount of chemical intake according to the water supply To stabilize concentration and yield It is possible.

The ClO ₂ gas produced above is grafted to the water supply line ejector block for transporting the high pressure water, diluted with water, and becomes a chlorine dioxide (ClO ₂ ) solution, which induces a rapid flow so that the chlorine dioxide produced first is discharged first. By using a storage tank to be quickly transferred to the reaction target may be made to the process of applying to the odor generating reaction target.

In the present application, the generated chlorine dioxide is used locally to increase the odor removal effect in the entire contents without remaining only in partial effects. In FIG. 1, a vesicle water supply for removing air bubbles generated in a odor source reactor is provided. By incorporating the chlorine dioxide solution storage tank into the line, the chlorine dioxide (ClO ₂ ) solution is deodorized using the defoaming device by using the ejector principle caused by the differential pressure of the parcel water supply line and the chlorine dioxide solution supply line transported at high pressure. It shows the process flow chart to maximize the use effect of chlorine dioxide by injection injection into the source.

2 shows a storage (transport) tank of chlorine dioxide generated, and FIG. 2A shows a storage (transport) tank in which a skew-type rotary pipe is incorporated, and in FIG. A storage (transport) tank provided by forming a guide plate in a cascade is provided. The storage tank may be selected from a stainless steel material, a synthetic resin material, or a synthetic fiber.

In order to achieve a structure in which the fluid introduced through the flow guide plate is provided with a built-in rotary pipe or is formed in a stepped manner having an angle, and discharged sequentially without accumulation of chlorine dioxide (ClO _2). ) Is to prevent long-term residence or side reactions during storage, causing a large amount of by-products such as carcinogens. In FIG. 2A, chlorine dioxide (ClO ₂ ) flowing into a storage (transport) tank having a skew-type rotary pipe is installed. While the solution rises up through the central pipe and rapidly rotates the skew-type rotary pipe, it illustrates a structure for rapidly transferring the odor source reactor without motive to cause side reactions. A large number of flow guide plates forming a zigzag guide flow path in the tank Chlorine dioxide is introduced is formed in a stepwise manner (ClO ₂₎ solution through the guide flow path in a zigzag type formed in the upper flow path guide plate to induce a rapid flow undergoes a flow path guide plate of the multiple tiers in the format sent to the next passage the guide plate causing a side reaction The structure for sending to the odor generating reactor without giving a motive is illustrated.

In order to prevent side reactions, the inside of the storage (transport) tank is preferably maintained at room temperature and prevented from being directly exposed to light by providing a shading facility, since chlorine dioxide may be decomposed when exposed to light.

The upper part of the storage (transport) tank shows a structure in which a pressure control valve is installed to measure and regulate the internal pressure of the storage (transport) tank.

Figure 3 is an embodiment structure for supplying the stored activated chlorine dioxide evenly throughout the odor source area to supply to the odor source material more effectively, the chlorine dioxide solution in the parcel water supply line for removing air bubbles generated in the odor source reaction tank It shows the means to disperse the chlorine dioxide (ClO ₂ ) solution in the parcel water by using the ejector principle caused by the differential pressure of the vesicle water supply line and the chlorine dioxide solution supply line is transferred to high pressure by grafting the supply line of.

That is, in FIG. 3, the chlorine dioxide stored in the pipe of the existing defoaming facility is supplied to the pump, and the chlorine dioxide is diluted in the parcel water sprayed from the odor source storage tank through the vesicle nozzle to be widely sprayed from the odor source. The chlorine dioxide is circulated in the tank and oxidized to reduce the odor source.

Hereinafter, in order to determine the reactivity of chlorine dioxide (ClO ₂ ) to the malodorous substances, the concentration of chlorine dioxide per odor source was added to determine the odor removal effect. The reactivity of chlorine dioxide is shown in Table-1.

TABLE-1

division Responsive pH response range Chlorine Dioxide Consumption Remarks Mercaptans RSH (R silver alkyl group) ClO ₂ Deodorization 5-9 4.5 × S content → Organic emulsions RSR ClO ₂ Deodorization 5-9 4.5 × S content → Organic emulsions RSSR ClO ₂ Deodorization 5-9 4.5 × S content → Secondary amines R2NH ClO2 Deodorization 5-9 4.5 × N content → Tertiary amines R3N ClO ₂ Deodorization 5-9 10.0 × N content P →

In addition, chlorine dioxide of the present application to the odor-causing substances in the sewage as an experiment to investigate the effect of reducing the odor to the GAS generated after the source to reduce the odor pollutant source from the inflow stage, first of all simple in the field In order to determine the odor reduction effect, the concentration of chlorine dioxide was injected into the influent source and the odor reduction of each sample was compared by the direct functional method. In addition, for accurate quantitative analysis, fresh sludge generated from the initial settler and influent water were sampled, and the gas generated before and after oxidation treatment of chlorine dioxide (ClO ₂ ) was measured.

1) Experiment Method

After collecting the incoming raw water, divided the sample into 5 samples, and treated chlorine dioxide (ClO ₂ ) with 0.2mg / L, 0.4mg / L, 0.6mg / L, and 0.8mg / L, respectively. Each sample was evaluated by smelling directly at the site and measuring the degree of odor.

Table-2 Pollution Degree of Samples (Direct Sensory Method)

                                                               (Unit: mg / L)

division Influent Fresh sludge Remarks BOD 130 3100 COD 75 1800 SS 95 3700 T-N 31 4500 stink 4 degrees (strong odor) 5 degrees (very strong odor) Direct sensory method (regulation standard: 2 degrees or less)

2) Experiment result

Table-3 Odor after chlorine dioxide treatment (direct functional method)

division Odor level before ClO ₂ treatment Odor after before ClO ₂ treatment Remarks 0.4mg / L 0.6mg / L 0.8mg / L 1.0mg / L S-1 4 4 3 3 One S-2 3 3 3 2 One S-3 3 3 3 2 One S-4 4 4 3 2 One Average 3.5 3.5 3 2 One Odor Very strong odor (4) Strong Odor (3) Regular odor (2) Detect (1) Odorless (0)

As can be seen from the above experimental data, when the chlorine dioxide injection rate is 0.4, the odor can be felt 3 degrees strong, and when 0.8 mg / L is injected, the odor is hardly detected and more than 1.0 mg / L. When injected, you can see the result that does not smell.

The present invention has the effect of reducing the initial investment cost, glass management of the odor removal method, by activating chlorine dioxide generated directly into the odor generating source, fundamentally remove odorous substances, easy storage, and provides a odor remover without secondary pollution. .

In addition, the chlorine dioxide used in the present application is used locally in the chlorine dioxide solution line to remove the bubbles generated in the odor source reaction tank in order to enhance the odor removal effect extensively throughout the contents without remaining only in partial effects The chlorine dioxide (ClO ₂ ) solution is injected into the odor generating source by using the defoaming device by using the ejector principle due to the differential pressure of the parcel water supply line and the chlorine dioxide solution supply line, which are transferred at high pressure by grafting the supply line of It has the effect of maximizing the use effect of chlorine dioxide.

Claims (3)

In the method of removing odor from odor generating sources of various industrial sites, A first step of generating chlorine dioxide (ClO ₂ ) through a chemical reaction with sodium chlorite (NaClO ₂ ) or sodium hypochlorite (NaClO) through hydrochloric acid (HCl); A second step of obtaining a concentrated solution of chlorine dioxide (ClO ₂ ) through an ejector block to concentrate the generated chlorine dioxide (ClO ₂ ) in water; A third step of rapidly transferring the chlorine dioxide (ClO ₂ ) solution of the second step through a storage tank having a circular screw or stepped flow to induce a rapid flow so that the chlorine dioxide produced first is discharged first; Including, Differential pressure is generated between the parcel water supply line and the chlorine dioxide solution supply line which are transported at high pressure by incorporating the chlorine dioxide solution supply line of the third step into the parcel water supply line for removing the bubbles generated in the odor generating reactor. Dispersing the chlorine dioxide (ClO ₂ ) solution in the vesicle water using the ejector absorption principle due to the odor removal method comprising the step of injection into the odor generating source. In the method for reducing odor by applying an oxidizing, sterilizing or disinfecting drug substance to the odor source reaction tank to remove the odor from various odor sources of industrial sites, The vesicle water supply line and the medicinal material supply line, which are transported at high pressure by incorporating the medicinal substance into the parcel water supply line, are transported at high pressure to the defoaming device to remove the bubbles generated in the odor generating reactor. Absorbing medicinal substances by using the ejector absorption principle due to the differential pressure generation and odor removal method comprising the step of injecting into the odor generating source together with the parcel water. In the odor removal device using chlorine dioxide (ClO ₂ ) to remove the odor of industrial sites, Means for generating gaseous chlorine dioxide (ClO ₂ ) through chemical reaction with hydrochloric acid (HCl) such as sodium chlorite (NaClO ₂ ) or sodium hypochlorite (NaClO), Means for obtaining the chlorine dioxide (ClO ₂ ) concentrate using an ejector block to concentrate the generated chlorine dioxide (ClO ₂ ) in water, Means for rapidly conveying the chlorine dioxide (ClO ₂ ) solution using a storage tank having a circular screw or stepped flow to induce a rapid flow so that the chlorine dioxide produced first is discharged first, Ejector principle due to the differential pressure of the parcel water supply line and the chlorine dioxide solution supply line which are transported at high pressure by grafting the chlorine dioxide solution supply line to the parcel water supply line for removing air bubbles generated in the odor generating reactor Deodorizing apparatus comprising a means for dispersing a chlorine dioxide (ClO ₂ ) solution in the parcel water using.

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