KR101309714B1 - The treating system of odors and volatile organic compounds simultaneously - Google Patents

Abstract

Disclosed is a waste gas treatment system for efficiently treating concentrated desorbed odors and volatile organic compounds simultaneously. The present invention provides a low concentration odor and volatile organic compound treatment system for treating waste gases containing low concentrations of sulfur-based odor components, nitrogen-based odor components, and volatile organic compounds. Adsorption concentrating means for desorbing the organic compound using desorbing air having a higher temperature and lower flow rate than the waste gas; And oxidizing means for combusting the desorbed gas, wherein at least a portion of the gas combusted and treated in the oxidizing means is re-introduced into the adsorption concentrating means. do. According to the present invention, it is possible to provide a odor and volatile organic compound simultaneous treatment system which minimizes residues when burning concentrated contaminants without causing problems in adsorption performance or lifespan.

Description

Odor and volatile organic compound simultaneous treatment system {THE TREATING SYSTEM OF ODORS AND VOLATILE ORGANIC COMPOUNDS SIMULTANEOUSLY}

The present invention relates to a method for treating waste gas simultaneously containing contaminants such as malodor and volatile organic compounds, and more particularly, to a waste gas treatment system for efficiently treating concentrated deodorized odor and volatile organic compounds simultaneously. .

With the recent tightening of legal regulations on the atmospheric environment, development of treatment technologies for odorous components such as ammonia and hydrogen sulfide and volatile organic compounds such as toluene and xylene is being activated. Among the waste gases containing low concentrations of sulfur sulfides such as hydrogen sulfide, methyl mercaptan and dimethyl sulfide, nitrogen based malodors such as ammonia and amines, and volatile organic compounds such as aldehydes and aromatic compounds, heat or catalyst may be used. It is very difficult to oxidize. In general, such waste gas is a small combustible component of the waste gas using an high temperature of more than 800 ℃ or an oxidation system using a catalyst of more than 300 ℃ because of the additional energy consumption is uneconomical. Therefore, as a recent technique, a regenerative combustion method of recovering a heat recovery rate of 90% or more using a heat storage material and treating a low concentration of volatile organic compounds has been widely used. The regenerative combustion method is an oxidation method that oxidizes volatile organic compounds to high temperature by maintaining the oxidation temperature at 800 ° C or higher. In general, when the temperature rise temperature is 40 to 80 ° C per cubic meter of gas unit, the volatile organic compounds in the waste gas are oxidized. Operation is possible without fuel supply. However, when the temperature rises below 40 ° C per cubic meter of gas, additional fuel is required. In the regenerative combustion method, the regenerative combustion method using a catalyst is called a regenerative catalyst combustion method, and the combustion temperature can be lowered to 300 to 450 ° C., thereby making it more economical. However, even in this case, a large amount of energy is consumed when the calorific value of the volatile organic compounds contained in the waste gas does not reach 15 to 30 ° C per cubic meter of gas. However, as environmental regulations have been strengthened in recent years, it is increasingly necessary to treat waste gases containing lower concentrations of odor or volatile organic compounds. In general, when only volatile organic compounds are included, there is no big problem in the treatment, but in the case of waste gas containing both odor and volatile organic compounds at the same time, the treatment is very difficult. In particular, when it contains sulfur-based malodorous components such as hydrogen sulfide, methyl mercaptan, dimethyl sulfide and the like, and nitrogen-based malodorous components such as ammonia and amine, it is difficult to concentrate and process using an adsorbent such as general activated carbon or silica. In particular, in the case of activated carbon-based adsorbents, the adsorption efficiency and concentration itself of the sulfur-based and nitrogen-based odor components are difficult to apply to the field. Therefore, there is a need for a new method for oxidizing low concentrations of waste gases containing sulfur-based and nitrogen-based odor components and containing volatile organic compounds simultaneously.

Korean Patent Application No. 2007-42401 discloses single or mixed volatile organic compounds such as sulfur-based odor components such as hydrogen sulfide, methyl mercaptan and dimethyl sulfide, nitrogen-based odor components such as ammonia amines, and aldehydes and aromatic compounds. A treatment system for treating complex waste gas has been proposed. The conventional system discharges the discharge gas discharged from the discharge source to the discharge port through the pretreatment means, the adsorption concentration means, the final oxidation means. Adsorption concentrating means consists mainly of one or more zeolites having a pore size of 3 kPa to 13 kPa alone or mixed, and is an adsorbent prepared by adding one or more of activated carbon, activated carbon fiber, alumina, and silica to odor and At the same time, the volatile organic compounds are adsorbed and concentrated to 3 to 30 times higher than the original concentration by branching out part of the waste gas or desorbing these adsorbed components using desorbed air (air used for desorption). This is processed through final oxidation facilities such as direct combustion systems, boilers, incinerators, catalytic oxidation systems, regenerative catalytic oxidation systems, and regenerative combustion systems, so that low concentrations of odors and volatile organic compounds are minimized while additional fuel is supplied. To have.

However, zeolites, which are the main adsorbents used in this system, suffer from problems in adsorption performance or lifetime when the process gas contains ammonia, hydrogen sulfide, aldehydes and the like. In particular, the zeolite has a problem that the structure is destroyed and cannot be used when treating a gas whose pH is lowered when decomposed.

In addition, this system has a problem in that when burning concentrated pollutants (odors, VOCs), after-burning residues remain at the final outlets (composite odors), thereby degrading odor treatment efficiency.

In addition, when the system is applied as a regenerative combustion and a regenerative catalytic combustion facility, cold contaminants remain in the empty space such as the regenerative material, which may lower processing efficiency and cause clogging, which may cause process problems.

In order to solve the problems of the prior art as described above, the present invention provides a odor and volatile organic compound simultaneous treatment system that does not cause problems in adsorption performance or life when the process gas contains ammonia, hydrogen sulfide, aldehyde and the like. The purpose.

It is also an object of the present invention to provide a odor and volatile organic compound simultaneous treatment system in which odor does not remain in the final outlet due to residue when burning concentrated contaminants (odors, VOCs).

In addition, the present invention provides a odor and volatile organic compound simultaneous treatment system that does not reduce the treatment efficiency or blockage when cold pollutants remain in the empty space such as the heat storage material when applied to the heat storage combustion and heat storage catalytic combustion equipment It aims to provide.

In order to achieve the above technical problem, the present invention provides a low concentration malodorous and volatile organic compound treatment system for treating waste gas containing a low concentration of sulfur-based malodorous component, nitrogen-based malodorous component and volatile organic compound, and adsorbs the waste gas that is introduced therein, Adsorption concentration means for desorbing the adsorbed odor component and volatile organic compound using desorption air at a higher temperature and lower flow rate than the waste gas; And oxidation means for combusting the desorbed gas, wherein the adsorption concentration means provides a treatment system for a low concentration of odor and volatile organic compounds comprising USY or ZSM-5 as an adsorption material.

In the present invention, the USY or ZSM-5 is a low concentration odor and volatile organic compounds treatment system characterized in that the coating on the base material.

In order to achieve the above another technical problem, the present invention further comprises a filter means selected from the group consisting of plate-like, bent-type and pocket-type filter means in order to process the high boiling point compound or liquid oil in the front end of the adsorption concentration means, calcined lime, Further comprising a bag filter having an absorbent adsorbent selected from the group consisting of activated carbon and a material containing at least 30% of the carbon component, the carbon-containing material is selected from the group consisting of coal, rubber, plastic, sewage sludge and oil It may be characterized in that it comprises a.

The present invention may also include an oil separator for filtering contaminants condensed at the front end of the oxidizing means among contaminants in the concentrated gas moved from the adsorption concentration means to the oxidizing means.

In the present invention, the oxidation means is provided with a rotary rotor and a heat storage layer, the rotary rotor is divided into an inlet region, an outlet region and a purge region, the hot gas of 60 ~ 350 ℃ can be introduced into the purge region. have.

In order to achieve the above another technical problem, the present invention provides a low concentration malodorous and volatile organic compound treatment system for treating waste gas containing a low concentration of sulfur based malodorous component, nitrogen based malodorous component, and volatile organic compound, and adsorbs the waste gas introduced therein. Adsorption concentrating means for desorbing the adsorbed malodorous component and the volatile organic compound using desorption air at a higher temperature and lower flow rate than the waste gas; And oxidizing means for combusting the desorbed gas, wherein at least a portion of the gas combusted and treated in the oxidizing means is re-introduced into the adsorption concentrating means. do.

At this time, the fraction of the gas flowing back into the adsorption concentration means is preferably 30% or more.

The present invention is a waste treatment process, a municipal waste incineration process, a food waste treatment process, a tire manufacturing process, a cigarette manufacturing process, a painting process and a marine product distribution and processing process, which simultaneously contain a low concentration of sulfur-based odor, nitrogen-based odor, and volatile organic compounds. It is possible to treat with high processing efficiency at low energy cost in burning waste gas generated in

When the process gas contains ammonia, hydrogen sulfide, aldehyde and the like, it is possible to provide a odor and volatile organic compound simultaneous treatment system that does not cause problems in adsorption performance or lifetime.

Specifically, the present invention can minimize residues when burning concentrated pollutants (odors, VOCs), and thus can efficiently process odors and volatile organic compounds simultaneously. In addition, the present invention provides a odor and volatile organic compound simultaneous treatment system that does not reduce the treatment efficiency or blockage when cold pollutants remain in the empty space such as the heat storage material when applied to the heat storage combustion and heat storage catalytic combustion equipment Can provide.

1 is a view schematically showing a odor and volatile organic compound simultaneous treatment system according to an embodiment of the present invention.
2 is a view schematically showing a odor and volatile organic compound simultaneous treatment system according to another embodiment of the present invention.
3 is a view conceptually showing a cross section of the concentrated adsorption means according to a preferred embodiment of the present invention.
4 is a view schematically showing the configuration of an oxidation means according to a preferred embodiment of the present invention.
5 is a diagram conceptually showing a rotor structure cross section of an oxidation means according to a preferred embodiment of the present invention.

Hereinafter, exemplary embodiments of the present invention will be described in detail with reference to the accompanying drawings.

1 is a schematic diagram illustrating a processing system according to the present invention. The waste gas introduced from the discharge source 10 removes components that may be a problem for the adsorption concentration means 40 and the final oxidation means 60 such as particulate matter in the pretreatment means 20. In general, the pretreatment means 20 may comprise means for removing granulated particles, particulates and chemicals.

In the present invention, when there are a lot of high boiling point compounds such as oil or mist or liquid oil in the waste gas, the pretreatment means 10 may be implemented as a bag filter system. The bag filter system is preferably a bag filter system having ash adsorbents or carbides of a substance having a high boiling point compound such as oil and mist and a liquid oil containing slaked lime, activated carbon or a carbon component. Examples of the material having a carbon component include coal, rubber, plastic, sewage sludge and oil containing 30% or more of the carbon component. As a substitute for the pretreatment means, plate, bent or pocket filter means can be used.

Odor and volatile organic compounds contained in the waste gas passed through the pretreatment means 20 of the waste gas discharged from the discharge source is adsorbed by the adsorbent while passing through the adsorption concentration means (40). As the adsorption concentration means 40, it is preferable to use a honeycomb rota type mobile phase adsorption concentration means capable of adjusting the rotational speed to 2 to 20 rph according to the concentration of the odor and the volatile organic compounds introduced therein. However, in some cases, fixed bed adsorption concentration means for repeating adsorption and desorption using two or more adsorption beds, or fluidized bed adsorption means using spherical adsorbents suitable for fluidization can be used.

In the present invention, the shape of the adsorbent used in the adsorption concentrating means 40 is used as a packed adsorbent using a spherical adsorbent, an amorphous adsorbent, a cylindrical adsorbent, and a honeycomb adsorbent, or by forming a laminated adsorbent using a bent, extruded and sheet adsorbent. It is also possible to use a honeycomb-shaped adsorbent shape having improved contact area with the.

In the present invention, it is preferable that the adsorbent include USY (Ultra Stable Zeolite), ZSM-5, or a mixture thereof as a main component. As mentioned above, zeolite adsorbents are mainly used for the treatment of VOCs. However, the present inventors have found that zeolite has problems in adsorption performance and lifespan when treating waste gas containing ammonia, hydrogen sulfide, aldehydes and the like as odor components. In particular, when treating the waste gas of the malodorous component that the pH is lowered during decomposition appears a problem that the structure is destroyed over time. Accordingly, in the present invention, USY, ZSM-5, and the like are used instead, and these materials exhibit high processing efficiency even for a long time operation for odor components generated in a tire manufacturing process. For example, when these adsorbents are used, the odor reduction effect by the air dilution functional method is 90% or more, and the VOC treatment efficiency by FID can also be obtained by 90% or more.

In the present invention, the USY or ZSM-5 may be provided in the form of being coated on or impregnated with a filter-like base material such as spherical, sheet-like, and laminated type.

In the present invention, the adsorption concentration means 40 has a concentrated drainage of about 4 to 15 times. For example, in the case where the concentration drainage is 12 times, if the gas amount of the discharge source is 1200 cmm, the concentrating means 40 may use a capacity of 1200 cmm, and the combustion equipment for treating the gas desorbed from the concentrating means may have a capacity of 100 cmm. It can be designed to have.

3 is a schematic view showing a cross section of the adsorption concentration means 40 according to the present invention. Adsorption concentration means 40 is divided into at least two areas. As shown, the adsorption concentration means 40 is divided into an adsorption part 42 and a desorption part 44, it may be provided with a cooling unit 46 at the boundary of the two areas.

The adsorption unit 42 adsorbs the odor and volatile organic compounds introduced thereto, and the desorption unit 44 desorbs the adsorbed compound. The cooling unit 46 cools the temperature raised during the desorption. The adsorption concentration means 40 shown in FIG. 3 is designed to rotate counterclockwise by a rotary rotor. In the present invention, the air branched from the waste gas may be introduced into the cooling unit 46 and the desorption unit 44. That is, the air branched from the waste gas flows into the cooling unit 46 and then cools the adsorbent layer, passes through the cooling unit 46, and then rises to a temperature necessary for desorption through the heating unit 50. Subsequently, the elevated temperature air flows into the desorption unit 44 to desorb the odor component and the volatile organic compound adsorbed to the adsorbent, and then is transferred to the final oxidation means 60 for processing.

As described above, in the present invention, air of 1/4 to 1/15 times of the waste gas discharged from the original discharge source may be used as desorption air. In addition, the desorption air may be heated up to 50 ~ 350 ℃ by the heating means (50). The gas desorbed by the desorption air and introduced into the final oxidation means 60 is completely oxidized at a high temperature of 400 to 1000 ° C. using the heat source 70, and then discharged to the outside.

In the present invention, the final oxidation means 60 may be used as a direct combustion equipment (TO), catalytic combustion equipment (CO), heat storage combustion equipment (RTO), heat storage catalyst combustion equipment (RCO). In order to reduce energy, combustion heat storage equipment (RTO) and heat storage catalytic combustion equipment (RCO) are commonly used as combustion equipment, and these equipments may include a heat source 70 as part of the equipment.

4 is a view schematically showing a heat storage combustion facility according to an embodiment of the present invention.

Referring to FIG. 4, the heat storage combustion equipment 60 includes a rotary rotor 64, a heat storage layer 65, and a combustion chamber 66 on the rotary rotor.

The rotary rotor 64 communicates with a gas inlet 61 for combustion of the gas, an outlet 62 of the combustion gas, and a purge gas inlet path 63.

The rotary rotor 64 is properly partitioned in order to separate the path of the gas flowing into the combustion chamber through the heat storage layer 65 or passing through the heat storage layer 65 after combustion and discharged to the outside. 5 is a diagram conceptually showing a cross section of the rotary rotor 64 of the present invention.

Referring to FIG. 5, the rotor 64 is circular in cross section and is divided into a gas inflow region In, a purge region P, and a gas outlet region Out, each region of the rotor corresponding to the heat storage layer thereon. Paired with the region to form gas inlet and outlet paths.

The gas inlet region In transfers the gas supplied through the gas inlet 61 together with the corresponding region of the heat storage layer to the combustion chamber 66. The gas outlet area Out discharges the gas that is burned in the combustion chamber 66 and then passes through the corresponding area of the heat storage layer 65 to the outside of the combustion facility. The purge region P serves as a path for purging contaminants in the rotor and the heat storage layer before the gas inlet region In is converted to the gas outlet region Out as the rotor rotates.

As shown, in the present invention, it is preferable to use hot air of 60 ~ 350 ℃ for purging. This is because it is difficult to easily remove odor components or high boiling point compounds adsorbed in the rotor or the heat storage layer by purging, and therefore purging with hot air is preferable for removing such components. To this end, in the present invention, the purging gas inlet path 63 may be provided with a suitable heating means (68). The introduced purging gas passes through the purging region P of the rotor and the corresponding region of the heat storage layer and is discharged out of the combustion installation.

Of course, a variety of methods may be used to raise the purge gas, such as a method using a separate heating means as described above, a method of exchanging heat from a gas branched from the combustion chamber 66, or a method of mixing a branched gas with external air. have.

In addition, in the present invention, the heat storage catalyst combustion equipment may be used in place of the heat storage combustion equipment. It can be used in case that much additional fuel is required for treatment because the temperature of temperature per unit cubic meter for operating the final oxidation means 60 does not reach 40 ~ 80 ℃ because the odor of gas and the concentration of volatile organic compounds are very low. have. In this case, the temperature of the combustion chamber 66 of the heat storage catalytic combustion system can be operated at 100 to 550 ° C., and even when the temperature is raised at 15 ° C. per cubic meter, operation can be performed almost without additional fuel. In this case, an extruded honeycomb catalyst is used in consideration of the pressure loss, and since it contains a low concentration of sulfur-based odor components, it is preferable to establish a regeneration system for poisoning of sulfur-resistant catalysts and catalysts. Sulfur-resistant catalysts are Co, Ni, Mo. It is preferable to use a honeycomb catalyst carrying a metal component containing at least one of V and W, and GHSV (Gas Hourly Space Velocity, 1 / hr) is designed to be 5,000 to 80,000. However, in the case of sulfur-resistant catalyst, it is preferable to apply to the waste gas having a high concentration of sulfur-based odor components and low concentration of volatile organic compounds. As a catalyst to be applied to the present system, a catalyst in which at least one component of the precious metal components of platinum, palladium and rhodium is selected and applied is used. In this case, when the concentration of the sulfur-based odor component is high, it is possible to increase the temperature of the catalyst layer to less than 750 ℃, the heat resistance temperature of the noble metal catalyst can have a function to remove the sulfur component.

Although not shown, the oil separator may be provided at the front end of the final oxidation means 60 in the present invention. Usually, the concentrated gas desorbed from the adsorption concentrating means 40 is liquefied and solidified at the inlet of the final oxidation means 60, resulting in a problem of lowering the operation and treatment efficiency of the facility. In this case, an oil separator may be used as a facility for filtering condensate condensed from the desorbed gas. The oil separator may be a filling (collision) type or a cooling type.

Referring back to FIG. 1, the gas discharged from the heat storage combustion equipment 60 is transferred through the blower 80.

At this time, there are a number of by-products due to combustion in the exhaust gas, these by-products produce a residue. 5 is a view schematically showing a odor and VOC simultaneous processing system according to another embodiment of the present invention.

Referring to FIG. 5, some or all of the exhaust gas discharged from the final oxidation means 60 is introduced into the adsorption concentration means 40. The inlet point of the exhaust gas may be a front end of the pretreatment means 20 or a front end of the adsorption concentration means 40. For example, when pretreatment is required for the residue component, the inflow point of the exhaust gas is preferably the front end of the pretreatment means 20, otherwise the front end of the adsorption concentration means 40 may be selected. Further, in the present invention, the fraction of the exhaust gas returned to the adsorption concentration means 40 may be appropriately selected by those skilled in the art, but preferably 30% or more of the exhaust gas. According to the present invention, the odor removal efficiency is increased in proportion to the fraction of the exhaust gas to be re-introduced. Therefore, at fractions of 30% or less, the effect on efficiency figures is minimal.

<Examples>

In this embodiment, the low concentration sulfur-based odor component, aldehydes and styrene components of the exhaust gas discharged from a tire factory are used for the heat storage catalyst combustion using USY and ZSM-5 zeolite-coated adsorption enrichment means and platinum catalyst. Treatment experiments were conducted using the facility.

The amount of air flowing into the system was 20 m3 / min, and the diameter of the adsorption concentrator was 500 mm cylindrical. The passage flow rate of the adsorption concentrator was 2 m / s, and GHSV of the catalytic combustion system was operated at 25000 1 / hr. The concentration of H ₂ S, CS ₂ , MeSH, and DMDS is about 10 ~ 100 ppb for sulfur compounds, which are designated odors. n-butyaldehyde was in the tens to hundreds of ppb levels. Styrene, a representative malodorous substance of VOCs, was 5 ppm. In addition, the compound odor was 1440 ~ 3000 times and the TVOCs were 18 ~ 42ppm.

As shown in FIG. 2, the concentration of the complex odor and the organic volatile compounds was measured using the apparatus for reflowing 90% of the combustion gas into the concentrating means as shown in FIG. 2 (Example). Meanwhile, the concentrations of the complex odor and the organic volatile compounds were measured under the same conditions except for re-introduction of combustion gas for comparison. Compound odor was measured by applying the air dilution sensory method of environmental pollution process test standard according to No. 4 under Article 6, Paragraph 1 of the Act on the Test of Environmental Sector, etc. The concentration of volatile organic compounds was Measured by a FID meter (portable fid meter, TVA-1000B), and expressed in units of PPM.

Table 1 below shows the measurement results (unit: multiples) of the compound odor by air dilution functional method, and Table 2 shows the results (unit ppm) of measuring the concentration of volatile organic compounds. In the table below, the inlet means the point entering from the discharge source of FIGS. 1 and 5, and the outlet represents the measured value at the outlet of FIGS. 1 and 5.

division Sample 1 Sample 2 Sample 3 Sample 4 Sample 5 Sample average Comparative example Entrance 2080 3000 1442 2080 2080 exit 208 208 144 144 208 efficiency 90% 93.1% 90.0% 93.1% 90.0% 91.2% Example Entrance 2154 2080 3000 2080 3000 exit 144 100 144 100 144 efficiency 93.3% 95.2% 95.2% 95.2% 95.2% 94.8%

division Sample 1 Sample 2 Sample 3 Sample 4 Sample 5 Sample average Comparative example Entrance 30 25 20 40 18 exit 1.5 One 0.9 1.8 1.2 efficiency 95% 96% 95.5% 95.5% 93.3% 91.2% Example Entrance 23 32 42 18 20 exit 0.8 0.8 1.2 0.6 0.6 efficiency 96.5% 97.5% 97.1% 96.7% 97.0% 97.0%

As can be seen in the above table, it can be seen that the occurrence of remnants is significantly reduced when branching the exhaust gas into the adsorption concentration means. In addition, it can be seen that the concentration of the volatile organic compound is lowered when the exhaust gas is reflowed into the concentrated adsorption means.

10: discharge source 20: pretreatment means
30: blower 40: concentrated adsorption means
42: adsorption area 44: desorption area
46: cooling zone 50: heat source
60: final oxidation means 61: inlet
62: outlet 63: purge inlet
64: rotor 65: adsorption layer
66: combustion chamber 70: heat source
80: blower 85: damper
90 outlet

Claims (7)

In a low concentration odor and volatile organic compound treatment system for treating waste gas containing a low concentration of sulfur-based odor component, nitrogen-based odor component and volatile organic compounds,
Adsorption concentrating means for adsorbing the introduced waste gas and desorbing the adsorbed malodorous component and the volatile organic compound using desorption air having a higher temperature and lower flow rate than the waste gas; And
An oxidation means for burning the desorbed gas,
The adsorption concentration means comprises USY or ZSM-5 as the adsorption material, the USY or ZSM-5 is coated on the base material,
The oxidation means is provided with a rotary rotor and a heat storage layer, the rotary rotor is divided into an inlet region, an outlet region and a purge region, low concentration odor, characterized in that the hot gas of 60 ~ 350 ℃ flowing into the purge region and Volatile organic compounds processing system. delete The method of claim 1,
The front end of the adsorption concentration means further comprises a filter means selected from the group consisting of plate, bent and pocket filter means for treating a high boiling point compound or liquid oil,
Further comprising a bag filter having an absorbent adsorbent selected from the group consisting of slaked lime, activated carbon and a substance containing at least 30% of carbon,
The carbon component-containing material is a low concentration odor and volatile organic compounds processing system, characterized in that it comprises a material selected from the group consisting of coal, rubber, plastic, sewage sludge and oil. The method of claim 1,
And a oil separator for filtering contaminants condensed at the front end of the oxidizing means among contaminants in the concentrated gas moved from the adsorption concentrating means to the oxidizing means. delete In a low concentration odor and volatile organic compound treatment system for treating waste gas containing a low concentration of sulfur-based odor component, nitrogen-based odor component and volatile organic compounds,
Adsorption concentrating means for adsorbing the introduced waste gas and desorbing the adsorbed malodorous component and the volatile organic compound using desorption air having a higher temperature and lower flow rate than the waste gas; And
An oxidation means for burning the desorbed gas,
And at least a portion of the gas treated by combustion in the oxidizing means is reflowed into the adsorption concentrating means. The method according to claim 6,
And a fraction of the gas re-introduced into the adsorption concentration means is 30% or more.

Images