KR20120052624A - Odor removal apparatus for a waste or a sewagedisposal treatment plant and method of the same - Google Patents

Abstract

PURPOSE: A method and an apparatus for dehydrating high concentration bad odor gas is provided to prevent the occurrence of secondary environmental contamination by purifying wastewater from a bad odor eliminating process and discharging the purified wastewater. CONSTITUTION: Bad odor is supplied from a bad odor supplying part(10). Ozone is supplied from an ozone generator. The bad odor is mixed with the ozone in a mixer(21), and the mixed gas is sprayed and supplied through injectors(22, 23). Hydrogen peroxide is supplied to a porous ceramic carrier through a spraying nozzle(34). The injected mixture is upwardly moved in the ceramic carrier. The ozone of the mixture is reacted with the hydrogen peroxide such that aqueous bad odor components are deodorized. Oxygen is reacted with hydroxyl groups.

Description

Odor gas deodorization method and deodorization device in sewage and wastewater treatment plant {ODOR REMOVAL APPARATUS FOR A WASTE OR A SEWAGE DISPOSAL TREATMENT PLANT AND METHOD OF THE SAME}

The present invention relates to a odor gas deodorization method and deodorization apparatus in sewage and wastewater treatment plant, and in particular, to effectively remove odor gas generated in sewage and wastewater treatment plant, in particular, hydrogen sulfide, ammonia, methyl mercaptan, methyl sulfide and trimethyl. The odor gas deodorization method and deodorization in the wastewater treatment plant are discharged in a state where the inlet blown gases such as amines are oxidized, decomposed and absorbed while passing through the highly oxidized multi-injection mixer and the water film-type porous ceramic carrier layer. Relates to a device.

In general, there are two types of odors, scents that make a person feel good, and odors that make people unpleasant. In the latter case, it refers to stimulating the human nervous system and causing mental and physical damage. According to Article 2 (Definition) of the Atmospheric Environment Conservation Act, 'odor' refers to hydrogen sulfide, mercaptans, amines, and other irritating gaseous substances. It is said to refer to the smell of irritating and disgusting by stimulating the sense of smell. In Korea, ammonia, methylmercaptan, hydrogen sulfide, methyl sulfide, methyl disulfide, trimethylamine, acetaldehyde and styrene are designated as odorous substances. These odor-causing substances vary widely depending on the source, and refineries, chemical plants, manure and livestock wastewater treatment plants, sewage treatment plants, and municipal waste landfills are considered to be major sources of odor in cities. In particular, environmental foundations such as sewage treatment plants, livestock and manure treatment plants are considered hateful facilities because of the above-mentioned odors and are subject to major complaints. Odor occurrences that occur as a problem must be solved.

Conventional odor treatment methods are largely classified into physical, chemical and biological treatment methods, and currently used methods include combustion, cleaning, oxidation, adsorption, and microbial treatment.

Among these combustion methods, the gas burner burns the odor gas at 600 ° C. to 800 ° C. to decompose it into carbon dioxide and water, and installs a catalyst grill such as platinum and cobalt to burn and oxidize the combustion within 300 ° C. to 400 ° C. It can be divided into catalytic combustion method, and it is effective to remove almost all combustible odorous substances, but it is expensive to maintain fuel cost or catalyst replacement, and there is a risk of nitrogen oxide and explosion if it is neglected in operation management.

The washing method is divided into a washing method and a chemical liquid washing method, and the odor gas is washed with water, an acid or an aqueous alkali solution and deodorized using neutralization, oxidation and reduction.

This method has the advantages of relatively simple equipment and low operating cost, but it has a narrow application range, difficult treatment of complex odor, and measures to prevent corrosion of facilities by using chemical solution, and wastewater, which is a secondary pollution source, is generated. There is this.

The oxidation method is a method of oxidizing and removing odor components by utilizing the powerful oxidation of ozone, which is relatively efficient in removing a large amount of gas due to low power consumption and easy maintenance, but ozone alone has a small application range and insufficient performance. In combination with other methods such as sena catalysts, there is a disadvantage that can exhibit high performance.

The adsorption method is a method of removing odor by using activated carbon, and is one of the methods widely used at present, and applied to various uses such as odor adsorption of various drugs or waste odors in a hospital, chemical plant, livestock, manure, and sewage treatment plant. do. Activated carbon can remove odors even in the presence of water, and is particularly effective at removing low-odor odors. The higher the molecular weight, the greater the adsorption capacity. Compared with the deodorizing effect of the combustion method, the removal rate is reduced, but there is an advantage that the initial installation cost is low and the operation method is easy. On the other hand, when various odorous substances accumulate in the pores of activated carbon and are adsorbed in a saturated state, and there is no deodorizing effect anymore, the odor begins to flow out, and the adsorbed carbon must be replaced with new charcoal. There is a disadvantage in that the concentration of the pretreatment such as cooling and condensation is reduced in parallel and then activated carbon adsorption is performed.

The microorganism treatment method is a method of decomposing odorous substances adsorbed using microorganisms when odor passes through wood chips or soil, and the process of dissolving and reacting odorous substances, absorbing by microorganisms, and converting them into odorless or low odorous substances. It consists of three steps: the process of doing so. This microbial treatment method has a disadvantage in that the growth conditions of the microorganisms involved in the removal of odors are properly formed, and the removal ability of almost all the odors is excellent, and secondary pollutants do not occur, while occupying a lot of land area.

Figure 1a is a schematic diagram showing a method for removing odor by the conventional ozone (O3) oxidation method. In the conventional ozone (O3) oxidation method, the odor 11 is introduced into the blower 12 to mix and contact the ozone (O3) generated by the ozone generator 16 and the odor in the ozone contact chamber 13 to deodorize the odor and surplus. Ozone (O3) is adsorbed on the activated carbon 14 to exhaust the harmless air 15.

 However, in the conventional ozone oxidation method by the above method, odorous components having large molecules and fast reacting substances can be treated with ozone (O3), but small molecules such as ammonia, methane and hydrogen disulfide can be treated only with ozone (O3). There was a difficult problem.

Figure 1b is a odor removal system using ozone (O3) and ozone water (O3 + H2O) of Patent No. 10-0886465,

(a) injecting and mixing a dissolved solution (H 2 O + O 3) and a malodorous gas in which cooling water (H 2 O) and ozone (O 3) are mixed into the sealed storage container; (b) discharging the gas from which the malodor is first removed by mixing the dissolved solution (H2O + O3) and the malodorous gas and the wastewater of the dissolved solution (H2O + O3) and the malodorous gas out of the storage container, respectively; Steps; (c) mixing the gas discharged from the storage container with ozone (O3) to remove odor secondly; (d) introducing the gas discharged in step (c) to remove ozone (O3) and then discharging it Doing; And (e) purifying the wastewater discharged in step (b) using ozone (O3). The odor removing method may be filled with one of a solid material including a fluororesin or a polymer material, a glass material, a plastic material, gravel inside the storage container, and dissolved through the upper end of the storage container. Injecting a solution, injecting the malodorous gas through the lower end of the storage container and mixed with the dissolved solution, and discharges the odor-free gas primarily through the upper end of the storage container, through the lower end of the storage container It is to discharge the waste water mixed with the dissolved solution (H 2 O + O 3) and odor gas. The odor removing method is spraying the dissolved solution through a nozzle installed in the upper end of the storage container, injecting the odor gas through the lower end of the storage container and mixed with the dissolved solution, 1 through the upper end of the storage container The odor gas is removed by car, and the wastewater in which the dissolved solution (H ₂ O + O ₃ ) and the odor gas are mixed is discharged through the lower end of the storage container.

However, in the conventional ozone oxidation method, the malodorous component having a large molecule and a fast reaction substance can be treated with ozone (O3), but small molecules such as ammonia, methane, hydrogen disulfide, etc. are difficult to process with only ozone (O3). In particular, in order to remove odors only, fluororesin or polymer materials, glass materials, plastic materials, solid materials including gravel and dissolved solutions are mixed with odor gas, thereby reducing the fundamental odor removal function. More fundamental odor removal methods and systems are urgently needed.

The present invention has been made to solve the problems of the prior art, the object of the present invention is the odor generated in wastewater treatment plants, such as sewage or sewage, manure and livestock wastewater treatment plants, landfills, fertilizer plants, high concentration livestock wastewater and phosphorus The present invention provides a odor gas deodorization method and a deodorization device in a wastewater treatment plant for purifying and treating odors generated from manure waste water using ozone (O ₃ ) and hydrogen peroxide (H ₂ O ₂ ) water.

The present invention is to provide a odor gas deodorizing device in the waste water treatment plant to mix the odor gas such as hydrogen sulfide, ammonia, methyl mercaptan, sulfide metal, trimethylamine and the like naturally through high oxidation type multi-injection. The purpose is.

The present invention is to deodorize the odor gas in the wastewater treatment plant to deodorize the odor gas odor by decomposing the odor gas mixed with high concentration ozone through the water film-type porous ceramic carrier layer and oxidatively decomposes hydrogen peroxide water and The purpose is to provide a deodorizer.

The present invention removes the odorous gas mixed, oxidized, and decomposed highly concentrated ozone from the moisture removal layer, and then removes the final dust, moisture, etc. through the impregnated activated carbon deodorizer to release the odor gas in the wastewater treatment plant. It is also an object to provide a deodorizing device.

Under the present invention for achieving the above object, the odor gas deodorizing apparatus in the wastewater treatment plant forms a space and a lower tank in the housing, and injects and supplies a H ₂ O ₂ liquid supply part and a gas mixed with odor and ozone in the middle. Forming an injector, forming a ceramic carrier impregnated with hydrogen peroxide water, and forming a water tank under the ceramic carrier, while the ozone mixed with the odor is injected downward and ascends upward in the carrier to form a liquid H ₂ O ₂ and The reaction is to deodorize the water-soluble liquid odor components (H ₂ S and NH ₄ ) and to react with oxygen and OH ⁻ .

Injector of the odor gas deodorizing device in the waste water treatment plant of the present invention for achieving the above object is sucked by the diameter of the inlet (P1), the distance (L1) is formed longer than the outlet diameter (P2), the distance (L2) As gas is discharged, it has a strong blowing force.

Under the present invention made in this way, the odor deodorization method of the wastewater treatment plant is made as follows.

The odor supply step of supplying the odor generated from the odor supply unit, the ozone step of supplying ozone generated from the ozone generator, and the gas mixed from the mixer while supplying the odor and ozone as a predetermined injector The hydrogen peroxide solution (liquid H) is injected through the injection nozzle 34 with the injection step of injecting and supplying the secondary, and the hydrogen peroxide mixed with water (H ₂ O) in the H ₂ O ₂ gas as the mixture gas is injected. Hydrogen peroxide supplying step to be injected into the porous ceramic carrier impregnated with ₂ O _{2 )} , and ozone mixed with the odor is injected downward through predetermined injectors and reacts with the liquid H ₂ O ₂ while rising upward. And a reaction step of deodorizing the water-soluble liquid odor components (H ₂ S and NH ₄ ) and reacting with oxygen and OH ⁻ .

The present invention prevents secondary environmental pollution by purifying and discharging wastewater generated in the odor removal process, and highly oxidative multi-injection of odor gas such as hydrogen sulfide, ammonia, methyl mercaptan, metal sulfide, and trimethylamine Through the high concentration of ozone is naturally mixed, the second pass through the water film-type porous ceramic carrier layer, and the hydrogen peroxide water is sprayed and oxidized by decomposition to provide a odor gas deodorization method and deodorization device in the waste water treatment plant. .

The present invention removes the odorous gas mixed, oxidized, and decomposed high concentration ozone in the moisture removal layer and removes the final dust, moisture, etc. through the impregnated activated carbon deodorizer to release the odor gas in the waste water treatment plant. And a deodorizer.

Figure 1a, 1b is a view showing a method and apparatus for removing the odor of conventional wastewater treatment plant,
2 is a schematic view showing the whole of the present invention deodorizer,
3A, 3B, and 3C are schematic views showing the injection structure of hydrogen peroxide solution of the present invention deodorizing device and enlarged main parts of the injector;
4A to 4C are views illustrating only the power supply unit, the ozone supply unit, and the hydrogen peroxide supply unit of the present invention.
5 is a schematic view of the present impregnated deodorizer.

Hereinafter, the deodorizing method and the deodorizing apparatus of the present invention will be described in detail with the accompanying drawings.

2 is a schematic view showing the entire deodorizing device of the present invention, Figures 3a, 3b, 3c is a schematic view showing the injection structure of hydrogen peroxide water of the present invention deodorizing device and the main part enlarged view of the injector, Figures 4a to 4 Figure 4c is a view showing only the power supply, ozone supply, hydrogen peroxide water supply of the present invention, Figure 5 is a schematic diagram of the impregnated deodorizer of the present invention.

Under the present invention according to the drawings, the odor gas deodorizer in the wastewater treatment plant is a space 14 in the housing 1, the H ₂ O ₂ liquid supply unit 30, and sprays and supplies a gas mixed with odor and ozone It consists of a housing (1) forming the injectors 22, 23, forming a ceramic carrier 18 impregnated with hydrogen peroxide water, and forming a water tank (13) below the ceramic carrier (18).

Specifically, the H ₂ O ₂ supply unit 30 forms several pumps 31 and H ₂ O ₂ liquid pumping line 32. The H ₂ O ₂ supply unit 30 is a spray pipe 33 so as to be controlled with a sufficient pressure through the several pumps 31 and the pumping line 32 by mixing water (H ₂ O) with H ₂ O ₂ gas After the supply is made of a configuration for injecting H ₂ O ₂ liquid through the injection nozzle (34).

That is, the injectors 22 and 23 are formed to mix the odor generated from the odor supply unit 10 and the ozone generated from the ozone generator and to spray and supply the mixed gas from the mixer 21. , Forming a ceramic carrier 18 impregnated with hydrogen peroxide water in the H ₂ O ₂ liquid supply unit 30 so as to react with the mixed gas of the injectors 22 and 23, and the water tank 13 below the ceramic carrier 18. formed soon as the ozone is a jekting downward mixed with the odor at the same time reacts with the liquid H ₂ O ₂ aqueous aekchwi components (H ₂ S and NH ₄₎ the deodorant and simultaneously oxygen and OH while rising upward in the ^carrier-to By reacting.

The multi-injection mixer (hereinafter referred to as an injector) 22, 23 is formed so that the diameter (P1), the distance (L1) of the inlet is formed longer than the outlet diameter (P2), the distance (L2) so that the inhaled gas is discharged strongly blowing force It has a structure. The configuration of such injector is a vacuum state inside the injector as pressurized treated water passes through the injector as described in the already known patent application No. 2002-0088538, and as the inside of the injector becomes a vacuum, the supplied mixed gas is quickly introduced into the injector. Inlet and mixed.

In this case, as the mixed gas is pulverized into fine bubbles, the contact efficiency between the exhaust gas and hydrogen peroxide in the carrier is maximized, and the first chemical reaction of hydrogen peroxide by ozone occurs.

The demister 16 stacked above the air injection nozzle is a kind of scrubber layer, and the eliminator 17 is stacked in a multi-pipe assembly and consists of a lattice-type FRP grating structure for adsorbing residual odor so as to pass the deodorized gas.

The deodorizing device of the present invention made as described above is preferably further provided with an impregnated deodorizer 50 on its outlet.

The impregnated deodorizer 50 is an enclosed enclosure having an inlet 51 and an outlet 52, and a dehumidifying demister 53, a medium filter 54, and various oxidation and adsorption catalyst chemicals therein. Made of activated carbon packed plates 55 adsorbed.

Under the present invention made as described above, the odor deodorization process of the wastewater treatment plant is as follows.

Odor generated from the odor supply unit 10 is supplied from the odor supply unit 10, and at the same time to ensure that the ozone supplied from the ozone supply unit 20 is transferred as a mixed gas in the mixer 21, wherein the mixed gas is 1 It is injected with a predetermined pressure through the secondary injectors 22 and 23.

The injected mixed gas is injected through the injection nozzles 34 formed in the injection pipe 33 through the predetermined pump 31 and the pumping line 32 by mixing water (H ₂ O) with the H ₂ O ₂ gas. To react in the ceramic carrier 18 impregnated with the H ₂ O ₂ solution.

That is, the ozone mixed with the odor is injected downward and ascends upward in the carrier 18 to react with the liquid H ₂ O ₂ to deodorize the water-soluble liquid odor components (H ₂ S and NH ₄ ) and simultaneously with oxygen and React with OH ⁻ . Therefore, the water-soluble liquid odor component (H ₂ S, NH ₄ ) is deodorized, decomposed into water (H ₂ O), H ₂ O ₂ , O _{3 (} O ₂ + O), OH ^- and water in the tank (13) It is collected and discharged as the OH ^- gases rise upwards.

That is, the odor introduced into the housing 1 is evenly transmitted to the entire surface of the water film-type porous ceramic carrier 18 through the multi-injection mixers 22 and 23, and uses a strong oxidizing power in the AO (Advanced Oxygen Process) method. The odor-causing substance is treated (in this case, the main ingredient causing AOP phenomenon is to use a high concentration of ozone and a special oxidant in combination), and the deodorized air is an eliminator (16) and a demister (DEMISTER). After passing through (17), the odorous components remaining in the impregnated deodorizer 50 using the impregnated activated carbon 55 are finally treated and discharged into the atmosphere.

Sometimes it is desirable to enable a dual use of the scrubber and the complex deodorizer according to the concentration of the incoming gas so as to make a system capable of treating unexpected high concentration odor gas.

The housing 1 has a square or circular tower shape, and supports the multi-injection mixers 22 and 23 and the membrane-type porous ceramic carrier 18 therein. The bottom of the housing forms a water reservoir 18 for circulating water. The upper part forms a support on which an eliminator (16) and a demister (DEMISTER) 17 are stacked, and installs a lattice-shaped FRP grating on the upper part of the support. Manholes for periodic inspections may be provided and monitoring windows may be provided.

On the other hand, the multi-injection mixer (22, 23) is a facility in which the high concentration ozone supplied from the odor supply unit 10 and the ozone supply unit 20 is introduced to the optimum conditions, orifice injector ( 22) The primary mixing is supplied by supplying a high concentration of ozone, and the in-line mixer (injector) 23 is installed to carry out secondary mixing after dispersion, and flows downward after final mixing. 18) dispersed and passed through.

Thereafter, the odorous gases remaining while being sucked into the impregnated deodorizer 50 are adsorbed while passing through the demister 53, the medium filter 54, and the activated carbon filling plate 55, and filtered to be discharged to the atmosphere.

Under the present invention, the odor deodorizing method of the wastewater septic tank is

 The ozone stage for supplying ozone generated from the ozone generator, the supply odor and ozone are mixed, and at the same time, the gas mixed from the mixer 21 is injected as a predetermined injector 22, 23 as secondary. , The mixing step of the gas consisting of the injection step of supplying,

Hydrogen peroxide (liquid H ₂ O _{2 )} impregnated with hydrogen peroxide (liquid H ₂ O _{2 )} through a spray nozzle (34) by injecting a mixed gas into the H ₂ O ₂ gas with water (H ₂ O) mixed therein Hydrogen peroxide supply step to be injected into the,

The ozone mixed with the odor is injected downward through the predetermined injectors 22 and 23 and at the same time ascending upward to deodorize the water-soluble liquid odor components (H ₂ S and NH ₄ ) by reacting with the liquid H ₂ O ₂ . and at the same time, oxygen and OH ^- comprises a reaction step that react with.

Since the deodorization process of the present invention has been described above, a detailed description thereof will be omitted.

However, the water film-type porous ceramic carrier 18 used in the composite deodorizer is excellent in removing odors and hardly decomposable odors such as hydrogen sulfides, ammonias, organic acids and hydrocarbons generated in the treatment plant. In particular, it is a material capable of emitting far-infrared rays at room temperature, and contains activated carbon, loess, and iron oxide, which have high deodorizing performance. The ceramic carrier 18 is porous and has excellent breathability and maximizes water film area. Floating ceramics are inadequate. The water supply device maintains the optimum operating conditions of the multi-injection mixer and the water-based porous ceramic deodorizer, and the low capacity ensures sufficient capacity to be circulated for 5 minutes, recirculates the water and uses the water in the tank. A water supply system should be provided to maintain the water level. Water is clean water and filtered water .. The water supply pump is a land pump, which provides a preliminary pump, and has a rigid structure to withstand continuous operation. The exposed piping connected to the water supply pump is insulated and treated with a rubber foaming agent, and the impregnated deodorizer 50 adds a catalytic function by attaching a metal compound or an organic or inorganic compound to activated carbon having excellent chemical adsorption ability, thereby providing strong chemical adsorption capacity. It is effective to change the pH by using deodorization method. The differential pressure sensing device installs a differential pressure gauge between the inlet and outlet of the composite deodorizer to detect the odor gas and the process gas that flows in. The machine is stopped to protect the combined deodorizer.

1: housing, 10: odor supply, 13: water tank, 14: space, 20: ozone supply,
21: mixer, 22, 23: injector, 30: hydrogen peroxide supply, 31: pump,
32: pumping line, 33: spray pipe, 34: spray nozzle,

Claims (4)

In the odor gas deodorization method and deodorizer in wastewater treatment plant,
In the housing 1,
The space 14 and the lower water tank 13 are formed upward, and water (H ₂ O) is mixed with H ₂ O ₂ gas in the middle of the spray pipe through a predetermined pump (31) and a pumping line (32). After supplying to the (33) to form a H ₂ O ₂ liquid supply unit 30 for injecting through the injection nozzle 34, the odor generated from the odor supply unit 10 and ozone generated from the ozone generator At the same time, the injectors 22 and 23 for injecting and supplying the mixed gas from the mixer 21 are formed, and the H ₂ O ₂ liquid supply unit 30 reacts with the mixed gas of the injectors 22 and 23. To form a ceramic carrier 18 impregnated with hydrogen peroxide water, and to form a water tank 13 below the ceramic carrier 18,
Odor and the soon as ozone jekting the downward mixing at the same time water-soluble aekchwi component while rising upward in the carrier reacts with the liquid H ₂ O ₂ and at the same time seize the (H ₂ S and NH ₄₎ oxygen and OH ^- to the reaction with Odor gas deodorizing device in the waste water treatment plant, characterized in that. The method of claim 1,
The injectors 22 and 23 are
The odor gas deodorizing apparatus in a wastewater treatment plant, characterized in that the diameter (P1), the distance (L1) of the inlet is formed longer than the outlet diameter (P2), the distance (L2). The method of claim 1,
Odor gas deodorizer in the waste water treatment plant, further comprising an impregnated deodorizer (50). In the odor gas deodorization method in the wastewater treatment plant,
Odor supply step of supplying the odor generated from the odor supply unit 10,
An ozone stage for supplying ozone generated from an ozone generator,
An injection step of injecting and supplying the mixed gas from the mixer 21 at the same time as mixing the supplied odor and ozone;
Simultaneously with the injection of the mixed gas, hydrogen peroxide water (liquid H ₂ O ₂ ) is injected into the porous ceramic carrier through the injection nozzle 34 with hydrogen peroxide water mixed with water (H ₂ O) in the H ₂ O ₂ gas. Hydrogen peroxide supply stage,
The ozone mixed with the odor is injected downward through predetermined injectors and at the same time ascending upward, reacts with the liquid H ₂ O ₂ to deodorize the water-soluble liquid odor components (H ₂ S and NH ₄ ) and simultaneously with oxygen and OH ⁻ Deodorization method in the waste water treatment plant, comprising a reaction step of reacting with.

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