KR101960732B1 - Exhausted Gas Purification Device Using Water Fluidized Bed and Bioreactor System - Google Patents

Abstract

The present invention relates to an environmentally friendly flue gas purifier using a water fluidized bed and a bioreactor. The flue gas purifier of the present invention appropriately cools a temperature of the flue gas containing high-temperature and high-concentration contaminants, and at the same time, lowers the concentration of contaminants by using a water fluidized bed and a bioreactor so that no absorption/adsorption filter and chemicals are used to be environmentally friendly. In addition, the flue gas purifier of the present invention includes a heat transfer tube in the water fluidized bed, and is capable of recovering sensible heat and latent heat of the flue gas through liquid-liquid exchange. The recovered sensible heat and latent heat are used as a heat source of a flue gas cooling unit, a second flue gas contamination reduction unit, and an active microorganism supply unit of the environmentally friendly flue gas purifier using the water fluidized bed and the bioreactor, thereby having an advantage of low maintenance cost.

Description

BACKGROUND OF THE INVENTION 1. Field of the Invention [0001] The present invention relates to an exhaust gas purifying device using a water fluidized bed and a bioreactor,

The present invention relates to an exhaust gas purification apparatus using a water fluidized bed and a bioreactor.

Various kinds of flue gas are generated in the industrial field. Flue-gas contains pollutants and odor components generated in the industrial field, which causes environmental pollution. In industrial sites, purification facilities are installed to prevent environmental pollution caused by flue gas. The pollutants contained in the flue-gas are removed by the adsorption or absorption method using a filter or by chemical decomposition at a high temperature. Particularly, exhaust gas discharged from industrial facilities is discharged at a high temperature of 100 to 900 ° C. The exhaust gas discharged at a high temperature contains a high concentration of pollutants, which promotes corrosion of the purification facility and further forms additional contaminants such as dioxins in the discharge process. Conventional flue gas purifying plants are not satisfactory in the decontamination performance of high temperature flue gases, are expensive to maintain and require additional personnel for facility operation, and the absorption / removal filters and chemicals discharged from the post- Thereby causing environmental pollution.

Korean Patent No. 10-0787811 discloses a method of cooling an incineration flue gas using a water fluidized bed. The above patent discloses a method for cooling a high temperature incineration flue gas using a water fluidized bed, collecting waste heat, and removing contaminants from the incineration flue gas. However, the present invention has a limitation in removing contaminants from the incineration flue gas, and there is a limitation in using an absorption / removal filter and chemicals.

Korean Patent Laid-Open No. 10-2008-0029522 discloses a malodor removing apparatus using a microbial bioreactor without the use of absorption / removal filters and chemicals. The malodor removing device using the microbial bioreactor eliminates the odor through direct contact with the microorganisms, so proper conditions for maintaining the microbial activity are needed. Normally, the microorganisms used for the offensive odor remain active at 20 to 40 캜. However, industrial flue-gases contain high-temperature and high-concentration pollutants and odor components ranging from 100 to 900 ° C. Therefore, when the flue gas generated in the industrial field is directly used, the activity of the microorganism is lost due to high temperature and high concentration of contaminants, and thus there is a limit in which the contamination can not be removed.

The patent documents and references cited herein are hereby incorporated by reference to the same extent as if each reference was individually and clearly identified by reference.

Korean Patent No. 10-0787811 Korean Patent Publication No. 10-2008-0029522

In order to solve the problems of the prior art for purifying flue gas containing high temperature and high concentrations of contaminants and odor components, the present invention reduces the temperature of the flue gas and the concentration of contaminants using a fluidized bed, And a bioreactor. The heat recovered from the temperature reduction aims to reduce energy consumption by recycling, reduce carbon emissions, and discharge clean exhaust gas.

Other objects and technical features of the present invention will be described in more detail with reference to the following detailed description, claims and drawings.

The present invention relates to a first exhaust gas pollution reduction unit in which an injected high temperature exhaust gas is brought into contact with a first cleaning cooling water to reduce energy of recycling of first sensible heat and latent heat, An exhaust gas cooling unit in which exhaust gas having passed through the first exhaust gas pollution reduction unit is brought into contact with the second cleaning cooling water to perform secondary sensible heat, latent heat recovery, and secondary pollution reduction; A second exhaust gas pollution reduction unit in which exhaust gas passed through the exhaust gas cooling unit is contacted with an active microorganism to perform a third pollution reduction; And an active microorganism supply unit for periodically supplying active microorganisms to the second exhaust gas pollution abatement unit, and an exhaust gas purification apparatus using the bioreactor.

The first exhaust gas pollution abatement portion and the exhaust gas cooling portion purify exhaust gas containing high temperature and high concentration pollutants into exhaust gas containing low temperature and low concentration pollutants. The flue gas containing the low-temperature and low-concentration pollutants is a state of the flue gas applicable to the second flue gas pollution reduction unit including a bioreactor for reducing contamination by contacting with active microorganisms. The second exhaust gas pollution abatement part contacts the active gas with the exhaust gas to completely remove the pollutant eco-friendly.

The first exhaust gas pollution reduction unit and the exhaust gas cooling unit recover sensible heat and latent heat, which are waste heat, which are waste heat using the water fluidized bed, and the recovered waste heat is reused as a heat source in the exhaust gas cooling unit, the second exhaust gas pollution reduction unit, and the active microorganism supply unit .

The flue gas containing the high temperature and high concentration of contaminants sequentially passes through the first flue gas pollution reduction portion, the exhaust gas cooling portion, and the second flue gas pollution reduction portion, and dust and odor components are removed environmentally.

 The exhaust gas passed through the exhaust gas cooling unit is in a state where the content of dust and odor components is reduced to 80 to 88% of the initial content, and when the exhaust gas passes through the second exhaust gas pollution reduction unit, The content is reduced to 95 to 98% of the initial content.

The present invention relates to an environmentally friendly flue gas purifier using a water fluidized bed and a bioreactor.

The flue gas purifying apparatus of the present invention appropriately cools the temperature of flue gas containing high-temperature and high-concentration contaminants, and at the same time, it lowers the concentration of contaminants by using a water fluidized bed and a bioreactor so that no absorption / It is an environmentally friendly flue gas purifier.

Further, the exhaust gas purifying apparatus of the present invention includes a heat transfer tube in the water fluidized bed, and is capable of recovering sensible heat and latent heat of flue gas through liquid-liquid exchange. The recovered sensible heat and latent heat are used as the exhaust gas cooling unit, the second exhaust gas pollution reduction unit and the active microbial supply unit heat source of the eco-friendly exhaust gas purification apparatus using the fluidized bed and the bioreactor.

FIG. 1 shows the structure of an exhaust gas purifying apparatus using a water flowing layer and a bioreactor according to the present invention.

The present invention relates to an apparatus for purifying exhaust gas using a water fluidized bed and a bioreactor, comprising a water fluidized bed (110) for conducting primary sensible heat, latent heat recovery and primary pollution reduction by bringing the injected hot exhaust gas into contact with a first fluidized bed A first exhaust gas pollution reduction unit (100) comprising: An exhaust gas cooling unit 200 including a water flowing layer 210 contacting the exhaust gas that has passed through the first exhaust gas pollution reduction unit with the second cleaning water 211 to perform secondary sensible heat, latent heat recovery, and secondary pollution reduction; A second exhaust gas pollution reduction unit (300) including a bioreactor (310) for performing a third pollution reduction by contacting an exhaust gas passed through the exhaust gas cooling unit with an active microorganism; And an active microorganism supply unit (400) for periodically supplying an active microorganism to the bioreactor (310) of the second exhaust gas pollution abatement unit, and an exhaust gas purifying apparatus using the bioreactor.

The first exhaust gas pollution reduction unit 100 is spaced apart from the inner lower end by a predetermined height. The first exhaust gas pollution reduction unit 100 includes a multi-stage first water flowing layer 110 connected to each other. In the multi-stage first water flowing layer 110, two or more water flowing layers are connected to each other, but are spaced apart to a predetermined height. The first water flowing layer 110 is installed with a first heat transfer pipe 112 which is filled with the first heat removal cooling water 111 at a predetermined height and recover sensible heat and latent heat by the first heat removal cooling water 111. Also, a first circulation pump 120 for circulating the first cleaning cooling water 111 is provided to promote the cooling of the exhaust gas by the first cleaning cooling water 111 and the recovery of sensible heat and latent heat.

When flue gas containing high-temperature and high-concentration pollutants flows into the first flue gas contamination reducing section 100, the flue gas primarily flows through the first heat transfer pipe 112 located inside the multi-stage first water flowing layer 110, And latent heat are recovered and recycled, and the flue gas is cooled. The sensible heat and the latent heat are recovered by the gas-liquid heat exchange in which the flue gas directly contacts the first cleaning cooling water 111 of the first water flowing layer 110 to exchange heat, Liquid heat exchange in which heat is indirectly exchanged between the liquid in the heat transfer pipe 112 and the wall surface of the first heat transfer pipe 112. [ Contaminants such as high concentration dust and odor components contained in the exhaust gas flowing into the first exhaust gas contamination reducing section 100 are dissolved in the first cleaning water 111 while passing through the first water flowing layer 110 The amount thereof is reduced.

The first water flowing layer 110 of the first exhaust gas contamination reducing section 100 is connected to each other and the first cooling water 111 is circulated by the first circulation pump 120. When the first cleaning cooling water 111 is circulated, the pollutant reduction efficiency and the cooling efficiency are improved. When the first cleaning cooling water 111 is saturated with contaminants or the temperature rises too much, cold water such as industrial water or water can be supplied for replacement. The replaced first cleaning cooling water 111 may be transferred to a pollution control apparatus and purified and reused or discharged. The first cleaning cooling water 111 may be cooled using the cooling device 220 of the exhaust gas cooling unit 200 when the temperature of the first cleaning cooling water 111 is not saturated by the contaminants and the cooling effect is deteriorated rapidly. Since the cooling device 220 uses the recovered waste heat, the maintenance cost can be saved.

The waste heat recovered through the first heat transfer pipe 112 in the first exhaust gas pollution reduction unit 100 is used to drive an exhaust gas purification apparatus using the water flowing layer and the bioreactor of the present invention. The apparatus for purifying exhaust gas using the water fluidized bed and the bioreactor according to the present invention comprises a cooling device 220 for cooling the second cleaning cooling water 211 of the exhaust gas cooling unit 200 and a cooling device 220 for cooling the exhaust gas of the second exhaust gas pollution reduction unit 300 The PAC media 311 having a plurality of active microorganisms in contact with the active microbial feeder 400 to remove pollutants and an activating tank 410 for cultivating the active microorganisms in the active microbial feeder 400 . In particular, the recovered waste heat is reused as a heat source of the cooling device 220, the bioreactor 310, and the activating tank 410 to cool the second cleaning cooling water 211 or to maintain the activity of the microorganism.

The exhaust gas cooling unit 200 includes a second water flowing layer 210 spaced apart from the first water flowing layer 110 of the first exhaust gas contamination reducing section 100 at a predetermined height. The second water cooling fluid 211 is filled in the second water fluidized bed 210 at a predetermined height and the second heat transfer pipe 212 recovering sensible heat and latent heat is locked. The second water fluidized bed (210) of the exhaust gas cooling unit (200) is spaced apart by a predetermined height and is installed in multiple stages connected to each other. The exhaust gas cooling unit 200 is provided with a cooling device 220 for cooling the second cleaning water 211 and an exhaust gas cooling unit circulation pump 230 for circulating the second cleaning water 211 .

The exhaust gas cooling unit 200 further reduces the temperature of the exhaust gas cooled in the first exhaust gas pollution reduction unit 100 and further reduces pollutants. The cooling device 220 and the flue gas cooler circulation pump 230 are additionally installed in the flue gas cooler 200 to further improve the cooling efficiency of the second clean coolant 211. If the temperature of the first or second cleaning water is high, it is advantageous to remove contaminants, but it is disadvantageous for cooling through recovery of sensible heat and latent heat. Therefore, the second water flowing layer 210 of the exhaust gas cooling unit 200 has a reduced pollutant reduction efficiency with respect to the exhaust gas compared to the first water flowing layer 110 of the first exhaust gas pollution reduction unit 100, There are more excellent features.

The exhaust gas passes through the first exhaust gas pollution reduction unit 100 and the first or second water fluidized bed 110 and 210 of the exhaust gas cooling unit 200 in order to remove most of the dust, It remains. The exhaust gas passed through the exhaust gas cooling unit 200 is injected into the second exhaust gas pollution reduction unit 300. The second exhaust gas pollution reduction unit 300 is mainly used to remove odor components included in the exhaust gas.

The second exhaust gas pollution reduction unit 300 includes a bioreactor 310 having a plurality of PAC media 311 including active microorganisms that directly contact the exhaust gas passing through the exhaust gas cooling unit 200 to remove contaminants, ; A gas discharging device 320 for discharging the exhaust gas whose pollution is reduced in the bioreactor 310 to the outside; And a bioreactor heater unit 330 for maintaining the temperature of the bioreactor 310 using a heat source recovered from the water flowing layers 110 and 210.

The second exhaust gas pollution reduction unit 300 is provided with a bioreactor 310. The bioreactor 310 includes a plurality of PAC media 311 including active microorganisms that directly contact the flue gas to remove contaminants. The activity of the microorganisms is directly related to the removal of flue gas pollutants. Therefore, the exhaust gas passing through the exhaust gas cooling unit 200 should be controlled to have an appropriate temperature and a concentration of contaminants so that the active microorganisms do not abruptly decrease activity.

The exhaust gas passing through the exhaust gas cooling unit 200 is in a temperature range of 25 to 40 ° C and contains contaminants reduced to one tenth of the initial exhaust gas. Particularly, the dust contained in the exhaust gas is removed by 95% or more while passing through the exhaust gas cooling unit 200, and the odor component is removed by 85% or more. Therefore, even if the exhaust gas passed through the exhaust gas cooling unit 200 is injected into the second exhaust gas pollution reduction unit 300, the activity of the active microorganisms does not decrease sharply.

In the present invention, the PAC medium 311 is used instead of the conventional porous media. The PAC media 311 is advantageous for maintaining the activity of the microorganisms because there is no clogging of the piping due to the passage of the exhaust gas compared to the conventional porous media. If the pipeline is clogged, the microorganisms accumulate and the culture condition becomes worse, and it is likely to be dead. If microorganisms are killed, it will cause additional odor. The PAC media 311 has the advantage that the exhaust gas contact surface can be further expanded compared to the conventional porous media. The PAC media 311 cultivates microorganisms using aggregates. Therefore, the use of the PAC media 311 in which the microorganisms are evenly distributed can improve the contact surface with the injected flue gas, thereby improving the purification efficiency of the flue gas. The bioreactor 310 of the second exhaust gas pollution reduction unit 300 must be maintained in an environment in which microorganisms can grow, thereby preventing degradation of the removal efficiency of odorous components due to microbial death and additional odor generation. To this end, the present invention includes a bioreactor heater device 330 for maintaining the temperature of the bioreactor 310 using a heat source recovered from the first or second water fluidized bed 110, 210. In addition, the recovered heat source is used as energy to continuously supply air (oxygen) to the active tank to promote the growth of microorganisms, thereby preventing the generation of odor due to microorganisms dead.

The exhaust gas purifying apparatus of the present invention is characterized in that the efficiency of removing odor components of the bioreactor 310 is maintained by periodically supplying active microorganisms from the outside. To this end, the present invention provides an active microbial supply (400).

The active microorganism feeder 400 includes an activated tank 410 for culturing an active microorganism; An activation heater device (420) for maintaining the temperature of the activation tank (410) using a heat source recovered from the first or second water fluidized bed (110, 210); And an active microorganism feeder 430 for periodically feeding the active microorganisms cultivated in the activation tank 410 to the bioreactor 310 of the second flue gas pollution reduction unit 300. The active microorganism supply unit 400 is an active tank 410 for cultivating an active microorganism in the same manner as the bioreactor 310 of the second exhaust gas pollution reduction unit 300. In particular, the active microbial feeder 400 provides an activator heater device 420 to maintain the culture conditions of the active microbes, wherein the activator heater device 420 comprises the first and second water fluidized beds 110, 210 ), Which is advantageous in that the maintenance cost is low. The active microorganisms cultivated in the activation tank 410 are supplied to the bioreactor 310 of the second exhaust pollution reduction unit 300 periodically by the active microorganism feeder 430 at an appropriate time.

In summary, when a high-temperature flue gas is injected into the flue gas purifying apparatus using the water flowing layer and the bioreactor of the present invention, the first flue gas contamination reducing section 100, the flue gas cooling section 200 and the second flue gas contamination reducing section 300) sequentially. Through this process, the heat of high temperature is recovered and recycled, and the flue gas is changed into flue gas at a temperature at which the active microorganisms are not killed, and most of the dust and odor components are removed. The thus changed flue gas is injected into the second flue gas pollution reduction unit 300 including the bioreactor to completely remove the residual pollution components.

When the exhaust gas passes through the exhaust gas cooling unit 200, the content of dust and odor components is reduced to 80 to 88% of the initial content, and the exhaust gas passes through the second exhaust gas pollution reduction unit 300 The content of dust and odor components is reduced to 95 to 98% of the initial content, respectively.

The flue gas purifying effect by the flue gas purifying apparatus using the water flowing layer and the bioreactor of the present invention will be described in detail through the following experimental examples.

Experimental Example

Experimental Example: Purification of Sewage Sludge Drying Flue Gas

The sewage sludge dried flue gas was purified using the flue gas purifying apparatus using the water flowing layer and the bioreactor of the present invention. In order to confirm the purifying performance of the exhaust gas purifying apparatus of the present invention, the exhaust gas generated in the drying process of the sewage sludge is injected into the exhaust gas purifying apparatus of the present invention and the dust concentration (mg / Sm ³ ) And odor component (odor ammonia) concentration (ppm) were analyzed and compared. For the analysis of the dust and odor components, cylindrical chamber method, gas chromatography and liquid chromatography method were used. Table 1 below shows the results of the analysis.

Item Injection flue gas Exhaust flue gas Removal efficiency Experimental Example 1 Dust (mg / Sm ³ ) 181.73 21.24 88.3% Odor ammonia (ppm) 129.4 22.2 82.8%

As a result of passing the flue gas generated in the drying process of the sewage sludge through the water fluidized bed, it was confirmed that 88.3% and 82.8% of the dust and odor ammonia components contained in the flue gas measured at the inlet were removed as shown in Table 1 above.

Experimental Example: Purification of boiler flue gas

The flue gas of the bunker-C boiler and the wood chip boiler was purified using the flue gas purifying apparatus using the water flowing layer and the bioreactor of the present invention.

The flue gas generated during the operation of the Bunker-C boiler and the wood chip boiler is injected into the flue gas purifying apparatus of the present invention and the concentration of dust (mg / Sm ³ ) and the concentration of odor components (sulfuric acid and hydrogen chloride) ppm) were analyzed and compared. For the analysis of the dust and odor components, cylindrical chamber method, gas chromatography and liquid chromatography method were used.

Table 2 below shows the purification results for the Bunker-C boiler flue gas.

 Temperature (℃) Dust concentration (mg / Sm ³ ) SOx concentration (ppm) Injection flue gas Exhaust flue gas Injection flue gas Exhaust flue gas Injection flue gas Exhaust flue gas Experimental Example 2 138 58 150 11.9 38.77 23.65 Experimental Example 3 105 51 150 28.2 64.89 39.58 Experimental Example 4 126 53 150 15.3 76.73 46.81

The bunker-C boiler used had a capacity of 5 T / h, and sulfur contained in the raw bunker-C oil was 1%. As a result, it was confirmed that the temperature of the Bunker-C boiler flue gas passed through the fluidized bed decreased to the level of 50 ° C. The cooled flue-gas may be prepared at an appropriate temperature (40 ° C level) that can be introduced into the downstream bioreactor after further cooling.

As a result of the experiment, it was confirmed that the exhaust gas passed through the flue gas purifying apparatus of the present invention had a dust concentration of 81 to 99% removed, and it was confirmed that 61% of sulfur dioxide (SOx) was removed on average.

Table 3 below shows the purification results for the wood chip boiler flue gas.

Dust concentration (mg / Sm ³ ) SOx concentration (ppm) Hydrogen chloride concentration (ppm) Injection flue gas Exhaust flue gas Injection flue gas Exhaust flue gas Injection flue gas Exhaust flue gas Experimental Example 5 27.8 7.0 57.79 19.94 0.36 0 Experimental Example 6 5.3 1.1 4.35 1.44 0.19 0 Experimental Example 7 20.6 1.0 5.12 3.02 0 0

The above result is a result of further cooling the exhaust gas passing through the water fluidized bed. Experimental results show that the removal efficiency of dust is about 83% and the SOx removal is about 61%. It was also confirmed that hydrogen chloride was removed by 10%. It was confirmed that the removal efficiency was lowered in comparison with the cooled condition as a result of checking the removal efficiency under the condition of no further cooling.

Experimental Example: Purification of Sludge Drying Flue Gas in the State Process

The flue gas purifying apparatus using the water flowing layer and the bioreactor of the present invention was used to purify the sludge drying flue gas of the alcohol processing. The sludge dried flue gas of the above-mentioned process was passed through a water fluidized bed and purified by passing through a bioreactor. The above-mentioned alcohol fermentation process consists of a step of preparing raw materials (Mashing), fermenting, distilling, and alcohol treatment. Since the exhaust gas generated in the above-mentioned process includes various chemical substances generated in the dust, fermentation, and distillation processes occurring in the preparation of the raw material, it must be discharged after proper purification. In particular, the sludge generated from the alcohol processing process contains a large amount of dust and various chemical substances during the drying process. In this Experimental Example, the concentration of various contaminants contained in the flue gas was analyzed through a test analysis by applying the sludge dried flue gas generated in the flue gas process to the flue gas purifying apparatus using the water flowing layer and the bioreactor of the present invention.

Through the above experiment, it has been confirmed that when the flue gas passes through the water fluidized bed, the temperature is lowered and the microorganisms are not killed even when they are injected into the bioreactor. In order to make it more clear, the temperature of the flue gas passed through the fluidized bed to be injected into the bioreactor was adjusted to 40 ° C or lower, and an additional cooling device was further provided if necessary. The test method of exhaust gas was conducted according to the National Institute of Environmental Research, Korea. The test method was cylindrical filter method, inductively coupled plasma atomic emission spectrometry, titrimetric method, ultraviolet spectroscopy, gas chromatography and liquid chromatography. The sampling conditions were as follows: flue gas was collected at the outlet, and the weather was clean weather, temperature 15 ℃, humidity 64%, and air pressure 766 ㎜Hg.

Table 4 shows test analysis results of the sludge dry exhaust gas of the alcohol purification process through the flue gas purifier using the fluidized bed of the present invention and the bioreactor.

Kinds How to measure Measurement result Experimental Example 8 Dust or particles (mg / Sm ³ ) dust Cylinder lid method 1.4 cadmium Inductively coupled plasma atomic emission spectroscopy Non-detection lead Inductively coupled plasma atomic emission spectroscopy Non-detection chrome Inductively coupled plasma atomic emission spectroscopy 0.0096 Mercury Inductively coupled plasma atomic emission spectroscopy Non-detection nickel Inductively coupled plasma atomic emission spectroscopy 0.049 Chemicals (ppm) Hydrogen cyanide Titration method Non-detection Fluoride Titration method Non-detection Chlorine compound Ultraviolet spectroscopy (orthotolysis) Non-detection Vinyl chloride Gas Chromatography (MS) Non-detection Lung Gas Chromatography (MS) Non-detection benzene Gas Chromatography (MS) 0.01 Carbon tetrachloride Gas Chromatography (MS) Non-detection Methyl difluoride Gas Chromatography (MS) Non-detection aniline Gas Chromatography (MS) Non-detection chloroform Gas Chromatography (MS) Non-detection 1,3-butadiene Gas Chromatography (MS) Non-detection Ethylene oxide Gas Chromatography (MS) Non-detection Dichloromethane Gas Chromatography (MS) Non-detection Styrene Gas Chromatography (MS) 0.001 Tetrachlorethylene Gas Chromatography (MS) Non-detection 1,2-dichloromethane Gas Chromatography (MS) Non-detection Ethylbenzene Gas Chromatography (MS) 0.004 Trichlorethylene Gas Chromatography (MS) Non-detection Acrylonitrile Gas Chromatography (MS) Non-detection Formaldehyde Liquid chromatography (HPLC) Non-detection Benzidine Liquid chromatography (HPLC) Non-detection Acetaldehyde Liquid chromatography (HPLC) 0.412

The experimental results, in the case of the dust emission standards of 50 mg / Sm ³ is a very small 1.4 mg / Sm ³ detection was confirmed more, chromium and nickel are also very small 0.0096 and 0.049 than that of 0.5 and 2 mg / Sm ^3, each discharge standard mg / Sm ³ was detected and confirmed to meet the emission standards. In addition, in the case of a chemical substance having a ring structure which causes a complex odor, all chemicals except benzene (benzene, ethylbenzene) were not detected. The discharge standard value of the benzenes is 10 ppm each. The exhaust gas purified through the exhaust gas purifying apparatus of the present invention was detected to contain only 0.04 to 0.01 ppm of benzene, which is much smaller than the emission reference value.

Therefore, it is considered that the flue gas purifying apparatus using the water flowing layer and the bioreactor of the present invention can remove most of the chemical substances that cause the mixed odor including dust.

The specific embodiments described herein are representative of preferred embodiments or examples of the present invention, and thus the scope of the present invention is not limited thereto. It will be apparent to those skilled in the art that modifications and other uses of the invention do not depart from the scope of the invention described in the claims.

100: first exhaust gas pollution reduction part 110: first water fluidized bed
111: first cleaning cooling water 112: first heat transfer pipe
120: first circulation pump 200: exhaust gas cooling unit
210: second water fluidized bed 211: second cleaning water
212: second heat transfer pipe 220: cooling device
221: Absorption cooler 230: Flue gas cooler circulation pump
300: second exhaust gas pollution reduction section 310: bioreactor
311: PAC media 320: gas discharge device
330: Bioreactor heater device 400: Active microbial supply part
410: Activation chamber 420: Activation chamber heater unit
430: active microbial feeder

Claims (9)

In an exhaust gas purification apparatus using a water fluidized bed and a bioreactor,
A first exhaust gas pollution reduction unit in which the injected high temperature exhaust gas is brought into contact with the first cleaning cooling water to perform primary sensible heat, latent heat recovery, and primary pollution reduction;
An exhaust gas cooling unit in which exhaust gas having passed through the first exhaust gas pollution reduction unit is brought into contact with the second cleaning cooling water to perform secondary sensible heat, latent heat recovery, and secondary pollution reduction;
A second exhaust gas pollution reduction unit in which exhaust gas passed through the exhaust gas cooling unit is contacted with an active microorganism to perform a third pollution reduction; And
An active microorganism supply unit for periodically supplying active microorganisms to the second exhaust gas pollution abatement unit;
And an exhaust gas purifying apparatus using the bioreactor.
The exhaust gas purification apparatus according to claim 1, wherein the first exhaust gas pollution reduction unit (100) is spaced apart from an inner lower end by a predetermined height, and the first cleaning cooling water is filled with a predetermined height to recover sensible heat and latent heat, And a first circulating pump for circulating the first washing water, characterized in that the first water circulating pump and the first water circulating pump are connected to each other and are locked by the washing water.
The exhaust gas cooling unit according to claim 1, wherein the exhaust gas cooling unit is spaced apart from the first water flowing layer of the first exhaust gas contamination reducing unit by a predetermined height and the second cleaning cooling water is filled at a predetermined height to lock the second heat transfer pipe recovering sensible heat and latent heat A second multi-stage water fluidized bed (210) interconnected; A cooling device for cooling the second cleaning cooling water; And a second circulation pump for circulating the second rinsing cooling water. The apparatus for purifying exhaust gas using the water flowing layer and the bioreactor according to claim 1,
The apparatus for purification of exhaust gas according to claim 3, wherein the cooling device is an absorption type cooler using a heat source.
The exhaust gas purifying apparatus according to claim 1, wherein the temperature of the exhaust gas passed through the exhaust gas cooling unit is 25 to 40 ° C.
[Claim 2] The method according to claim 1, wherein the second exhaust gas pollution reduction unit comprises: a bioreactor having a multi-stage PAC media including active microorganisms that directly contact the exhaust gas passing through the exhaust gas cooling unit to remove contaminants; A gas discharging device for discharging exhaust gas having passed through the bioreactor and having reduced contamination to the outside; And a bioreactor heater device for maintaining the temperature of the bioreactor using the recovered primary and secondary sensible heat and latent heat.
2. The method of claim 1, wherein the active microbial feeder comprises an activated tank for cultivating an active microorganism; An activating heater device for maintaining the temperature of the activating bath 410 using the recovered first and second sensible heat and latent heat; And an active microorganism feeder for periodically feeding the active microorganisms cultivated in the activated sludge to the bioreactor of the second flue gas pollution abatement unit.
The method according to claim 1, wherein the exhaust gas passes through the first exhaust gas pollution reduction unit, the exhaust gas cooling unit, and the second exhaust gas pollution reduction unit in order to remove dust and odor components, and a bioreactor Used flue gas purifier.
9. The method according to claim 8, wherein when the exhaust gas passes through the exhaust gas cooling unit, the content of dust and odor components is reduced to 80 to 88% of the initial content, and when the exhaust gas passes through the second exhaust gas pollution reduction unit, And the content of the odor component is reduced to the level of 95 to 98% A flue gas purifying device using a water fluidized bed and a bioreactor.

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