KR100784409B1 - Concentrated Catalytic Oxidizing System of Volatile Organic Compounds, and Method Therefor - Google Patents

Abstract

The present invention relates to a volatile organic compound concentrated catalytic combustion system and method. More specifically, a desorption process is carried out in some enrichment banks, and the adsorption process is carried out in other enrichment banks, with a plurality of enrichment banks, thereby increasing the adsorption efficiency, reducing the operating cost, and easily expanding the volatile organic compound enrichment catalyst. A combustion system and method thereof are provided.

The present invention provides a concentrating device (3) comprising a combination of concentrating banks (3a, 3b, 3c, 3d) for receiving the contaminants from a volatile organic compound generating source (1) and adsorbing the contaminants; An adsorption blower (4) for discharging the exhaust gas from which the contaminants have been removed in the concentrating device (3) to the stack (7); An oxidation device (5) for supplying hot air for desorption of the concentrated banks (3a, 3b, 3c, 3d) and for oxidizing the desorbed volatile organic compounds; And an oxidizing blower (6). The volatile organic compound concentration catalyst, characterized in that the adsorption process and desorption process of the contaminants in each of the concentration banks (3a, 3b, 3c, 3d) are performed sequentially. Provides a combustion system and its operating method.

VOCs, VOCs, concentrated catalytic combustion, adsorption, desorption, concentration banks, concentration units, air pollution

Description

Concentrated Catalytic Oxidizing System of Volatile Organic Compounds, and Method Therefor}

1 is a block diagram of a volatile organic compound concentrated catalytic combustion system according to a preferred embodiment of the present invention,

Figure 2a is a diagram illustrating an adsorption process in a volatile organic compound concentrated catalytic combustion system according to a preferred embodiment of the present invention,

2B is a view illustrating a process of circulating and heating hot air in a volatile organic compound concentrated catalytic combustion system according to a preferred embodiment of the present invention;

Figure 2c is a diagram illustrating a desorption and combustion process in a volatile organic compound concentrated catalytic combustion system according to a preferred embodiment of the present invention,

2d is a view showing a process of cooling a concentrated bank in a volatile organic compound concentrated catalytic combustion system according to a preferred embodiment of the present invention;

3 is a view showing the configuration of a catalytic oxidation apparatus of a volatile organic compound treatment system according to a preferred embodiment of the present invention;

4 is a perspective view of a modular enrichment bank in a volatile organic compound treatment system according to a preferred embodiment of the present invention;

5 is a perspective view of a concentration module inserted into a modular concentration bank in a volatile organic compound processing system according to a preferred embodiment of the present invention;

6 is a side view of a modular enrichment bank in a volatile organic compound treatment system according to a preferred embodiment of the present invention;

7 is a side view of an expanded modular enrichment bank in a volatile organic compound treatment system according to a preferred embodiment of the present invention;

8 is a block diagram of a volatile organic compound concentrated catalytic combustion system according to another preferred embodiment of the present invention.

<Explanation of symbols for main parts of the drawings>

1: VOC source 2: pretreatment device

3: concentration device 3a, 3b, 3c, 3d: adsorption bank

4: Blower for adsorption 5: Catalytic oxidizer

6: blower for oxidation 7: stack

10: Concentrator Connection Duct

12a, 12b, 12c, 12d: condenser connecting duct branch pipe

16a, 16b, 16c, 16d: adsorption exhaust duct branch pipe

20: adsorption exhaust duct 22: desorption hot air supply duct

24a, 24b, 24c, 24d: Detachable hot air supply duct branch pipe

28a, 28b, 28c, 28d: Detachable hot air exhaust duct branch pipe

32: desorption hot air exhaust duct 34: hot air circulation duct

42: flue gas discharge duct 46: external air supply duct

52: cooling air discharge duct 60: heating means

62: pretreatment catalyst 64: VOC catalyst

70: modular enrichment bank 72: case

74: door 76: blocking plate

78: concentration module insertion hole 80: concentration module support

82: adsorption gas inlet 84: adsorption gas exhaust

86: desorption hot air inlet 88: desorption hot air exhaust

90: concentration module 92: front panel

94: gas outlet 96: rear panel

98: connection lip 100: fibrous activated carbon

The present invention relates to a volatile organic compound concentrated catalytic combustion system and method. More specifically, the adsorption process is carried out in some enrichment banks, and the desorption process is carried out in some enrichment banks, with a plurality of enrichment banks, thereby increasing the adsorption efficiency, reducing operating costs, and easily expanding the volatile organic compound enrichment catalyst. A combustion system and method thereof are provided.

Volatile Organic Compounds (VOCs) are liquid or gaseous organic compounds that easily evaporate into the atmosphere due to their high vapor pressure. Volatile organic compounds co-exist with nitrogen oxides in the atmosphere, causing photochemical reactions under the action of sunlight, producing photochemical oxidizing substances such as ozone and peroxyacetyl nitrate (PAN), causing photochemical smog and causing global warming and destruction of the stratospheric ozone layer. And odor.

Volatile organic compounds are typically used for incomplete combustion of fuels and evaporation of petroleum products, organic solvents and paints, as well as automotive, petroleum refining, petrochemical manufacturing facilities, storage stations, laundry, paint manufacturing facilities, printing ink manufacturing facilities, and small organic solvents. Facilities, road paving facilities, printing and painting facilities are known as major sources of emissions.

Since these volatile organic compounds have a great impact on the environment and the human body, most countries are making efforts to reduce their emissions. In Korea, regulations on the emission of volatile organic compounds have been tightened based on the Air Quality Preservation Act. Currently, legal regulations on volatile organic compounds in Korea are applied to 37 industries and 10 regulated substances in the special air conservation special measures area (Ulsan / Onsan Industrial Complex, Yeosu Industrial Complex) and the air environment regulation region (Capital Region, Gwangyang, Busan, Daegu). It is being applied only, but as air quality deteriorates, it is continuously being strengthened.

In particular, the paint facility, which is a typical volatile organic compound discharge facility, is designated as an air pollutant discharge facility, and from January 1, 2005, the regulated area will be expanded nationwide, and the emission allowance standard will be released for total hydrocarbon (THC). Depending on the size of the plant, it has been enhanced to less than 50 to 100 ppm.

On the other hand, large-scale volatile organic compound discharge facilities are odor emission facilities and are simultaneously regulated by the odor prevention law. As the quality of life improves, regulations on these are gradually being reinforced.

Conventional techniques for treating volatile organic compounds include adsorption, absorption, condensation, thermal incineration, catalytic oxidation, and microbial filtration. The adsorption method is a method of adsorbing volatile organic compounds using granular activated carbon having excellent adsorption performance. The absorption method is a method of removing volatile organic compounds using an acid and an alkali absorber. A condensation method is a method of recovering a solvent using a condensation device. The thermal incineration method is a method of directly burning a volatile organic compound to remove it, and the catalytic oxidation method is a method of oxidizing and removing a volatile organic compound at a low reaction temperature using a catalyst. Finally, microbial filtration is a method of filtering volatile organic compounds using microorganisms.

However, the conventional methods of treating volatile organic compounds have problems such as removal efficiency, treatment speed and treatment capacity, facility cost, operation cost, and secondary pollution. In particular, volatile organic compound discharge facilities have various types of discharge facilities, have different characteristics of exhaust gases, and have severe changes in operating conditions. Conventional volatile organic compound treatment facilities do not apply appropriate prevention techniques to the characteristics of the discharge facilities. As a result, problems such as low removal efficiency or excessive facility and operating costs existed.

Conventionally, a method using an activated carbon concentrate (AC Tower), regenerative thermal oxide (RTO), or regenerative catalytic oxidizer (RCO) has been widely used in Korea.

The treatment method using the activated carbon concentrating device is a method of adsorbing and removing volatile organic compounds and odorous substances by using the fine pores of activated carbon, which has the advantages of low initial installation cost and simple device and easy operation, but low removal efficiency and activated carbon. Excessive replacement cost and high pressure loss consumes a lot of power and may cause a fire due to the concentration of volatile organic compounds.

On the other hand, the treatment method using a regenerative combustion device or a regenerative catalytic oxidation device is a method of burning volatile organic compounds and odorous substances directly or at a high temperature by using a catalyst, which has advantages of high removal efficiency and relatively easy operation and maintenance. It has the disadvantages that the device is large, the facility cost is high, the initial start is difficult, the energy cost is excessively consumed, and the pressure loss is high, which consumes a lot of power.

Accordingly, there is a need for a high efficiency and low cost volatile organic compound treatment technology for effectively treating volatile organic compounds having large air volume, low concentration, and low temperature generated in most volatile organic compound discharge facilities.

In order to solve the above problems, the present invention is provided with a plurality of enrichment banks, and in some enrichment banks, the adsorption process is progressed, and in other enrichment banks, the adsorption process proceeds by catalytic combustion of the desorbed volatile organic compounds. It is an object of the present invention to provide a volatile organic compound enriched catalytic combustion system and method capable of continuous operation while improving the removal efficiency of the catalyst and reducing the operating cost.

In order to achieve the above object, the present invention, in the volatile organic compound processing system for removing the pollutant generated from the volatile organic compound generating source (1) for discharging the pollutant including the volatile organic compound, the volatile organic compound A concentrating device (3) consisting of a combination of concentrating banks (3a, 3b, 3c, 3d) receiving the contaminants from the source (1) through a concentrator connection duct (10) and adsorbing the contaminants; An adsorption blower connected to the enrichment banks 3a, 3b, 3c, and 3d of the concentrator 3 through an adsorption exhaust duct 20 to discharge exhaust gas from which the contaminants have been removed to the stack 7. 4); Hot air for desorption of the concentration banks 3a, 3b, 3c, and 3d is supplied to the concentration banks 3a, 3b, 3c, and 3d through the desorption hot air supply duct 22, and the concentration banks 3a and 3b. An oxidation apparatus (5) for thermally oxidizing the contaminants including the volatile organic compounds desorbed by receiving the hot air desorbed from 3c and 3d through a desorption hot air exhaust duct (32); An oxidation blower 6 for driving the hot air; And controlling the order in which the adsorption process and the desorption process of the contaminants in the concentration banks 3a, 3b, 3c, and 3d are performed, and the temperature of the hot air for desorption supplied from the oxidizing apparatus 5 is controlled. It provides a volatile organic compound concentrated catalytic combustion system comprising a central control device for controlling.

The present invention also provides a concentrating device including a plurality of concentrating banks for adsorbing contaminants such as volatile organic compounds, a blower for adsorption, and a hot air for desorption of the condensing banks, thereby catalytically oxidizing the desorbed volatile organic compounds. A method of operating a volatile organic compound enriched catalytic combustion system comprising a catalytic oxidizer and an oxidation blower, the method comprising: (a) an adsorption step of adsorbing the volatile organic compound to the concentrated bank; (b) a desorption step of desorbing the concentrated bank to which the volatile organic compound is adsorbed using hot air; And (c) catalytically oxidizing the volatile organic compound desorbed in the concentration bank, wherein the adsorption step is performed in the remaining concentration bank when the desorption step is performed in any one of the concentration banks. And the desorption step is performed sequentially with respect to the enrichment bank, thereby providing a method of operating a volatile organic compound enrichment catalytic combustion system.

Hereinafter, exemplary embodiments of the present invention will be described in detail with reference to the accompanying drawings. First, in adding reference numerals to the components of each drawing, it should be noted that the same reference numerals are assigned to the same components as much as possible, even if shown on different drawings. In addition, in describing the present invention, when it is determined that the detailed description of the related well-known configuration or function may obscure the gist of the present invention, the detailed description thereof will be omitted. In addition, the following will describe a preferred embodiment of the present invention, but the technical idea of the present invention is not limited thereto and may be variously modified and modified by those skilled in the art.

Volatile organic compound enrichment catalytic combustion system according to a preferred embodiment of the present invention uses a concentrated bank including activated carbon fiber (ACF) containing volatile organic compounds or volatile organic compounds and odorous substances at high air volume, low concentration and low temperature. Adsorption is carried out to remove the volatile organic compounds adsorbed in the concentrated bank by hot air, and the desorbed volatile organic compounds are removed using a small catalytic oxidizer. This configuration is described below.

1 is a block diagram of a volatile organic compound concentrated catalytic combustion system according to a preferred embodiment of the present invention.

The volatile organic compound enriched catalytic combustion system according to a preferred embodiment of the present invention adsorbs contaminants such as volatile organic compounds, pretreatment apparatus 2 for removing dust among contaminants generated from volatile organic compound (VOC) generators (1), and the like. A concentrating device 3 for adsorption, a blower for adsorption 4 for adsorption, a catalytic oxidizer 5 for generating hot air for desorption of the concentrating device 3 and catalytic oxidation of contaminants such as desorbed organic compounds, and concentration An oxidation blower 6 for the desorption and catalytic oxidation of the device 3.

Volatile organic compound generating sources (1) can be petroleum refining facilities, petrochemical manufacturing facilities, storage stations, laundries, paint manufacturing facilities, printing ink manufacturing facilities, small organic solvent use facilities, road paving facilities, printing and various painting facilities, etc. have. The volatile organic compound generator 1 may emit various odorous substances including volatile organic compounds.

It is preferable that the exhaust gas containing contaminants including volatile organic compounds generated from the volatile organic compound generating source 1 first pass through the pretreatment apparatus 2. That is, the exhaust gas generated from the volatile organic compound generating source 1 may include particulate matter such as dust in addition to gaseous pollutants. If such particulate matter is present, it may be adhered to the concentrating device 3, which may lower the adsorption performance. Therefore, it is preferable to provide a pretreatment device 2 incorporating a pretreatment filter for removing particulate matter.

The pretreatment device 2 is connected to the concentrator 3 via a concentrator connection duct 10. The concentrating device 3 consists of a combination of a plurality of concentrating banks 3a, 3b, 3c and 3d. The concentrating device connecting duct 10 is branched according to the number of concentrating banks 3a, 3b, 3c and 3d. The concentrator connecting duct branches 12a, 12b, 12c, 12d are formed and the concentrating device connecting duct branches 12a, 12b, 12c, 12d are connected to the concentrating banks 3a, 3b, 3c, 3d.

Each concentrator connecting duct branch pipe 12a, 12b, 12c, 12d is provided with an adsorption flow path control damper 14a, 14b, 14c, 14d. In accordance with the adsorption or desorption process of the enrichment banks 3a, 3b, 3c, and 3d, the opening and closing of the adsorption channel control dampers 14a, 14b, 14c, and 14d are controlled.

The concentrating device 3 comprises two or more concentration banks 3a, 3b, 3c and 3d, which allow the adsorption and desorption processes in the concentration banks 3a, 3b, 3c and 3d to be performed sequentially. This is to ensure that the whole system does not stop working. In FIG. 1, four enrichment banks 3a, 3b, 3c, and 3d are illustrated. In the practice of the present invention, the number of enrichment banks 3a, 3b, 3c, and 3d is not limited thereto. What is necessary is just to provide two or more enrichment banks by an appropriate number according to the characteristic.

However, in the following description, the concentrator 4 is made up of four first enrichment banks 3a, second enrichment banks 3b, third enrichment banks 3c, and fourth enrichment banks 3d. Explain.

Each of the enrichment banks 3a, 3b, 3c, and 3d is provided with a enrichment module using fibrous activated carbon such that contaminants including volatile organic compounds are adsorbed. Since the enrichment module using fibrous activated carbon is used, the adsorption efficiency is excellent and the adsorption and desorption can be easily performed. Fibrous activated carbon has a large specific surface area, fast adsorption rate, easy desorption even at low temperatures, and excellent reproducibility.

The enrichment banks 3a, 3b, 3c, and 3d are connected to the adsorption exhaust duct branch pipes 16a, 16b, 16c, and 16d, and the adsorption exhaust duct branch pipes 16a, 16b, 16c, and 16d are the adsorption exhaust ducts 20. ). At this time, each of the adsorption exhaust duct branch pipes (16a, 16b, 16c, 16d) is provided with discharge flow path control dampers (18a, 18b, 18b, 18c) after the adsorption in the enrichment bank (3a, 3b, 3c, 3d) Regulate the discharge of purified gas.

The adsorption exhaust duct 20 is connected to the adsorption blower 4, and the concentrator blower 4 is connected to the stack 7. The adsorption blower 4 guides the contaminated gas to the concentrator 3 during the adsorption process and discharges the gas to the stack 7 after the adsorption process.

Referring to the adsorption process in the concentrating device 3 according to this configuration, the polluted air generated from the volatile organic compound generating source 1 in accordance with the operation of the adsorption blower 4 passes through the pretreatment device 2. It is removed, and contaminants such as volatile organic compounds are adsorbed through the concentration banks 3a, 3b, 3c, and 3d of the concentration device 3, and then discharged to the stack 7. The adsorption channel control dampers 14a, 14b, 14c, and 14d and the discharge channel control dampers 18a, 18b, 18b, and 18c are operated to adjust the enrichment banks 3a, 3b, 3c, and 3d in which adsorption is performed.

On the other hand, the volatile organic compound concentrated catalytic combustion system according to the preferred embodiment of the present invention is provided with a device for burning the desorbed and desorbed concentrated gas of the concentration device (3).

The catalytic oxidizer 5 comprises a heating device, a pretreatment catalyst and a VOC catalyst, and is connected to the oxidizing blower 6. The catalytic oxidizer 5 is connected to the desorption hot air supply duct 22. The desorption hot air supply duct 22 is branched into the desorption hot air supply duct branch pipes 24a, 24b, 24c, and 24d to the concentrated banks 3a and 3b. , 3c, 3d). Each desorption hot air supply duct branch pipe 24a, 24b, 24c, 24d is provided with desorption flow path control dampers 26a, 26b, 26c, 26d. The desorption channel control dampers 26a, 26b, 26c, and 26d serve to control hot air supplied from the catalytic oxidizer 5 to the concentration banks 3a, 3b, 3c, and 3d.

In the practice of the present invention, a catalytic oxidizer 5 for oxidizing desorbed volatile organic compounds or odors such as odors using a catalyst is preferably used, but a general thermal oxidizer is used instead of the catalytic oxidizer 5. It is also possible to oxidize contaminants such as volatile organic compounds and odors desorbed by use. That is, it is to be understood that the catalytic oxidizer 5 is used for higher efficiency, but the use of a general thermal oxidizer is included in the spirit of the present invention. In addition, it is to be understood that oxidizing or decomposing volatile organic compounds by microbial filtration, electron beam, plasma, or the like is within the scope of the present invention.

In connection with the desorption hot air supply duct 22, the enrichment banks 3a, 3b, 3c and 3d are connected to the desorption hot air exhaust duct 32 via the desorption hot air exhaust duct branch pipes 28a, 28b, 28c and 28d. Each of the desorption hot air exhaust duct branch pipes 28a, 28b, 28c, and 28d is provided with desorption exhaust flow path control dampers 30a, 30b, 30c, and 30d.

The adsorption exhaust duct 32 is connected to the oxidation blower 6 so that hot air desorbed volatile organic compounds from the concentration banks 3a, 3b, 3c, and 3d is absorbed by the oxidation blower 6 by the adsorption exhaust duct 32. It is delivered to the catalytic oxidizer (5) via.

On the other hand, for desorption of the concentration banks 3a, 3b, 3c, 3d, hot air of a predetermined temperature, preferably about 150 ° C or higher, must be supplied to the concentration banks 3a, 3b, 3c, 3d. However, it is not preferable to supply air which is not completely heated in the catalytic oxidizer 5 to the concentration banks 3a, 3b, 3c, and 3d. Therefore, it is necessary to heat the hot air while circulating the catalyst oxidizer 5 to supply hot air of a predetermined temperature or more.

To this end, the hot air circulation duct 34 is connected to the outlet of the catalytic oxidizer 5, and the first hot air circulation damper 36 is detached to prevent hot air supply to the desorption hot air supply duct 22 when the hot air is circulated. It is provided in the hot air supply duct 22. In addition, the hot air circulation duct 34 is connected to one end of the adsorption exhaust duct 32, the second hot air circulation to prevent the gas of the adsorption exhaust duct 32 is transferred to the hot air circulation duct 34 during the desorption process. The damper 38 is provided in the hot air circulation duct 34. Meanwhile, in order to prevent hot air from flowing back into the adsorption exhaust duct 32 during the hot air circulation, a third hot air circulation is provided at the front end of the adsorption exhaust duct 32 at the point where the hot air circulation duct 34 is connected to the adsorption exhaust duct 32. A damper 40 is provided.

The heating process and the desorption / treatment process through the circulation of hot air according to such a configuration are as follows.

In order to desorb the concentrated banks 3a, 3b, 3c, and 3d, the air of the catalytic oxidizer 5 is first heated while circulating. The oxidizing blower 6 is operated to circulate the air through the hot air circulation duct 34 to the catalytic oxidizer 5. At this time, the first hot air circulation damper 36 is closed, the second hot air circulation damper 38 is opened, and the third hot air circulation damper 40 is closed to allow the hot air to circulate the catalytic oxidation device 5.

When the hot air reaches a predetermined temperature or more, the first hot air circulation damper 36 is opened, the second hot air circulation damper 38 is closed, and the third hot air circulation damper 40 is opened. The hot air is supplied to the concentrated bank to be detached through the hot air supply duct 22. The hot air desorbs the volatile organic compounds adsorbed to the concentration banks 3a, 3b, 3c, and 3d of the concentrator 3, and is then transferred to the catalytic oxidizer 5 through the adsorption exhaust duct 32.

Thereafter, the contaminants, including volatile organic compounds, are oxidized and processed while passing through the catalytic oxidizer 5.

The hot air after the pollutant is oxidized is transferred to the stack 7 through the combustion gas discharge duct 42. At this time, the stack discharge control damper 44 is provided in the combustion gas discharge duct 42 to control the gas discharge to the combustion gas discharge duct 42.

After the desorption of the concentration banks 3a, 3b, 3c, 3d is completed, it is necessary to lower the temperature of the concentration banks 3a, 3b, 3c, 3d for the adsorption process. This is because the adsorption process in the concentrated banks 3a, 3b, 3c, and 3d has high efficiency at low temperatures. In this case, it is preferable to cool the concentrated banks 3a, 3b, 3c, and 3d by supplying external air to the concentration banks 3a, 3b, 3c, and 3d using the oxidation blower 6.

To this end, the external air supply duct 46 is connected to the removable hot air supply duct 22, and the external air supply duct 46 is provided with an external air control damper 48. The outside air supplied from the outside air supply duct 46 by the operation of the oxidation blower 6 is transferred to the concentration banks 3a, 3b, 3c, and 3d, and then the oxidation blower through the desorption hot air exhaust duct 32. Is passed to (6). On the other hand, the cooling air discharge duct 52 is provided at the outlet end of the oxidation blower 6 for exhausting the air used for cooling, and the cooling air discharge damper 54 is provided at the cooling air discharge duct 52. In front of the catalytic oxidizer 5, a cooling air blocking damper 50 is provided.

Since the air used for cooling the enrichment banks 3a, 3b, 3c, and 3d may contain contaminants such as volatile organic compounds, the cooling air discharge duct 52 is preferably connected to the concentrator connection duct 10. However, in the practice of the present invention, the cooling air discharge duct 52 may be directly connected to the stack 7, or may be connected to the adsorption exhaust duct 20.

Referring to the operation state of the volatile organic compound concentrated catalytic combustion system according to a preferred embodiment of the present invention described above as follows.

Each enrichment bank 3a, 3b, 3c, 3d of the volatile organic compound enrichment catalytic combustion system according to a preferred embodiment of the present invention is subjected to a series of adsorption, desorption and catalytic combustion, and cooling. In the case of two enrichment banks 3a, 3b, 3c and 3d, adsorption proceeds in one enrichment bank and desorption and catalytic combustion and cooling proceeds in the other enrichment bank. If the number of enrichment banks 3a, 3b, 3c, 3d exceeds two, some enrichment banks are subjected to adsorption and the other enrichment banks are desorption and catalytic combustion and cooling.

In the following description, a desorption process is performed on the first enrichment bank 3a, and an adsorption process is performed on the second enrichment bank 3b, the third enrichment bank 3c, and the fourth enrichment bank 3d. do.

Figure 2a is a view showing the adsorption process in the volatile organic compound concentrated catalytic combustion system according to a preferred embodiment of the present invention, Figure 2b is a hot air in the volatile organic compound concentrated catalytic combustion system according to a preferred embodiment of the present invention 2 is a view illustrating a process of circulating and heating, and FIG. 2C is a diagram illustrating a desorption and combustion process in a volatile organic compound concentrated catalytic combustion system according to a preferred embodiment of the present invention, and FIG. 2D is a preferred embodiment of the present invention. In the volatile organic compound concentrated catalytic combustion system according to the present invention, a diagram illustrating a process of cooling a concentrated bank is given.

First, the adsorption process of the remaining concentration banks 3b, 3c, and 3d except for the first concentration bank 3a will be described with reference to FIG. 2A.

The first suction channel control damper 14a and the first discharge channel control damper 18a are closed, and the other second, third and fourth suction channel control dampers 14b, 14c, and 14d and the second, third and fourth discharge channels are closed. The control dampers 18b, 18c and 18d are opened. On the other hand, the first desorption channel control damper 26a and the first desorption exhaust channel control damper 30a are opened for desorption of the first enrichment bank 3a and the second, third and fourth desorption channel control dampers 26b and 26c. And 26d) and the second, third and fourth removable exhaust flow path control dampers 30b, 30c and 30d are closed.

The exhaust gas generated from the VOC generating source 1 by the operation of the adsorption blower 4 passes through the pretreatment device 2 to remove dust, and the second, third and fourth concentrator connecting duct branch pipes 12b and 12c. 12d) to the second, third and fourth enrichment banks 3b, 3c and 3d. After passing through the second, third and fourth concentration banks 3b, 3c, and 3d, contaminants including volatile organic compounds are adsorbed, and then the second, third and fourth adsorption exhaust duct branch pipes 16b, 16c, and 16d and adsorption exhaust. It is discharged to the stack 7 through the duct 20.

Meanwhile, the desorption process is performed in the first concentration bank 3a. In order to proceed with the desorption process, hot air having a predetermined temperature or more must be supplied to the first concentration bank 3a. If the air in the catalytic oxidizer 5 has already reached a sufficient temperature for desorption, the desorption process of the first concentrated bank 3a is immediately proceeded. Otherwise, the air of the catalytic oxidizer 5 is desorbed. It is desirable to self circulate to preheat the air.

A preheating process in the catalytic oxidizer 5 will be described with reference to FIG. 2B.

When the first hot air circulation damper 36 is closed, the second hot air circulation damper 38 is opened, and the oxidizing blower 6 is operated while the third hot air circulation damper 40 is closed, the catalytic oxidation device 5 The heated air is circulated to the catalytic oxidizer 5 through the hot air circulation duct 34. When the air discharged from the catalytic oxidizer 5 reaches a predetermined temperature or more, the first hot air circulation damper 36 is opened, the second hot air circulation damper 38 is closed, and the third hot air circulation damper 40 is opened to open the catalyst. The hot air of the oxidizer 5 is supplied to the first concentration bank 3a.

A desorption process of the first concentration bank 3a will be described with reference to FIG. 2C.

As the hot hot air supplied from the catalytic oxidizer 5 passes through the first concentrated bank 3a, the volatile organic compounds adsorbed to the first concentrated bank 3a are desorbed. At this time, the amount and temperature of the desorption hot air is controlled by a preset temperature control program. The desorbed gas is transferred to the catalytic oxidizer 5 and heated to the catalytic reaction temperature in the catalytic oxidizer 5 and then introduced into the catalyst chamber. Through catalytic reactions, volatile organic compounds are oxidized and decomposed into harmless carbon dioxide and water.

The hot gas decomposed in the catalytic oxidizer 5 continues to be used as hot air for desorption, a part of which is circulated through the hot air circulation duct 34 or finally through the combustion gas discharge duct 42. 7) can be discharged.

Next, a cooling process of the first concentration bank 3a will be described with reference to FIG. 2D.

Open the external air control damper 48, close the cooling air shutoff damper 50 and operate the oxidation blower 6 while the cooling air discharge damper 54 is opened.

The outside air is delivered to the first concentrated bank 3a through the first desorption hot air supply duct branch tube 24a through the outside air supply duct 46 and the desorption hot air supply duct 22. The external air is cooled to the first concentrated bank 3a and then transferred to the cooling air discharge duct 52 through the desorption hot air exhaust duct 32 and the oxidation blower 6. The air used for cooling is then transferred to the second, third and fourth enrichment banks 3b, 3c and 3d via the concentrator connection duct 10 for resorption or direct discharge into the stack 7.

The above description relates to a state in which the desorption and cooling processes are performed in the first concentration bank 3a and the adsorption process is performed in the second, third and fourth concentration banks 3b.

After a certain time, the desorption process is completed, the first enrichment bank 3a allows the adsorption process to proceed, and the desorption order is switched so that the desorption process of the second enrichment bank 3b proceeds. In this way, each of the enrichment banks 3a, 3b, 3c, 3d continues to repeat the adsorption process, the desorption process and the cooling process.

On the other hand, when the concentration of volatile organic compounds discharged from the concentration banks 3a, 3b, 3c, and 3d in the desorption process is low, a desorption and cooling process is performed and a constant rest process is performed before the conversion to the adsorption process. It is also possible.

In the volatile organic compound treatment system according to a preferred embodiment of the present invention, the configuration of the catalytic oxidation device 5 will be further described.

3 is a view showing the configuration of a catalytic oxidation apparatus of a volatile organic compound treatment system according to a preferred embodiment of the present invention.

The catalytic oxidizer 5 is connected to the adsorption exhaust duct 32 and the desorption hot air supply duct 22, respectively. The catalytic oxidizer 5 is provided with a heating means 60 and is provided with a pretreatment catalyst 62 and a VOC catalyst 64. The heating means 60 can be comprised using a burner or an electrical heating apparatus.

The pretreatment catalyst 62 is for removing the catalyst poison in the desorption exhaust gas. In the exhaust gas, there is a possibility that a substance which reduces the catalyst life, such as organosilicon, organophosphorus or organometallic, may be present, so that the pretreatment catalyst 62 is provided to increase the life of the catalyst.

The VOC catalyst 64 is made of platinum or palladium-based noble metals to promote oxidation of volatile organic compounds.

The volatile organic compound supplied through the adsorption exhaust duct 32 is heated to a constant temperature by the heating means 60 and then passes through the pretreatment catalyst 62 and the VOC catalyst 64 and is decomposed into water and carbon dioxide. Decomposition of volatile organic compounds using a catalyst eliminates the need to heat volatile organic compounds to high temperatures.

In the volatile organic compound treatment system according to the preferred embodiment of the present invention, the configuration of the enrichment banks 3a, 3b, 3c, and 3d will be described in more detail.

The enrichment banks 3a, 3b, 3c, and 3d are devices for performing adsorption and desorption processes of organic compounds in the exhaust gas. In the practice of the present invention, the constitution of the enrichment banks 3a, 3b, 3c, and 3d is standardized. This facilitates fabrication, installation and maintenance and ensures scalability.

4 is a perspective view of a modular enrichment bank in a volatile organic compound treatment system according to a preferred embodiment of the present invention, and FIG. 5 is inserted into a modular enrichment bank in a volatile organic compound treatment system according to a preferred embodiment of the present invention. Is a perspective view of a concentration module. 6 is a side view of a modular enrichment bank in a volatile organic compound treatment system according to a preferred embodiment of the present invention.

The concentration module 90 is inserted into the modular concentration bank 70 to allow adsorption and desorption of volatile organic compounds.

The modular enrichment bank 70 is provided with a case 72, a door 74 provided at the front portion of the case 72, and a enrichment module insertion opening 78 to partition the inside of the case 72. Blocking plate 76, adsorption gas inlet 82 through which adsorption gas flows, adsorption gas exhaust section 84 through which adsorption gas is discharged, desorption hot air inlet 86 through which desorption hot air flows, and desorption hot air The desorption hot air exhaust unit 88 is discharged. On the other hand, it is preferable that the bottom 75 of the case 72 is provided with a leg 75 for supporting the case 72.

Door 74 is attached to the front portion of the case 72 is configured to open and close, the door 74 is configured to be kept closed in a closed state.

 The blocking plate 76 is provided with a concentration module insertion hole 78. When the concentration module 90 is inserted into the concentration module insertion hole 78, gas is not leaked to the front and rear parts except for the concentration module 90. do. Inside the thickening module insert 78 is provided with a thickening module support 80 in the form of a rail. The enrichment module support 80 facilitates the insertion of the enrichment module 90 and supports the enrichment module 90.

The upper portion of the inner front portion of the case 72 divided by the blocking plate 76 is provided with a removable hot air exhaust unit 88, and the lower portion is provided with an adsorption gas exhaust unit 84. In addition, an adsorption gas inlet 82 is provided at an upper portion of an inner rear portion of the case separated by a blocking plate 76, and a desorption hot air inlet 86 is provided at a lower portion thereof. The adsorption gas inlet 82 is connected to the concentrator connecting duct branch pipes 12a, 12b, 12c, 12d, and the adsorption gas exhaust section 84 is connected to the adsorption exhaust duct branch pipes 16a, 16b, 16c, 16d. Connected. The desorption hot air inlet 86 is connected to the desorption hot air supply duct branch pipes 24a, 24b, 24c, and 24d, and the desorption hot air exhaust unit 88 is connected to the desorption hot air exhaust duct branch pipes 28a, 28b, 28c, and 28d. Connected with

Accordingly, in the adsorption process, adsorption gas is introduced from the adsorption gas inlet 82 of the upper inner rear part of the case 72, and is adsorbed to the adsorption gas exhaust unit 84 provided below the inner front part of the case 72. The gas is released. In the desorption process, the desorption hot air is introduced from the desorption hot air inlet 86 under the inner rear part of the case 72, and the desorption hot air is discharged to the desorption hot air exhaust unit 88 on the upper inner front part of the case 72.

5, the concentration module 90 will be described.

The enrichment module 90 is a unit module inserted into the enrichment module insertion hole 78 provided in the modular enrichment bank 70 to adsorb volatile organic compounds. The enrichment module 90 includes a front plate 92 fixed to the front of the enrichment module insertion hole 78, a back plate 96 inserted into the case 72, a front plate 92 and a back plate 96. Including a connecting rib (Rib) (98) for connecting, and the fibrous activated carbon 100 is attached to the outside of the connecting rib (98). Since the fibrous activated carbon 100 is a kind of fabric-like form, the fibrous activated carbon 100 may be wrapped and attached to the outside of the connecting lip 98. The fibrous activated carbon 100 is preferably wrapped around the outside of the connecting lip 98 in two to four layers.

Handles 93a and 93b are preferably provided above and below the front plate 92 of the concentration module 90. The central portion of the front plate 92 is provided with a gas outlet 94 to discharge the gas passing through the fibrous activated carbon 100.

On the other hand, it is preferable to have an auxiliary wheel 102 in the lower portion of the back plate (96). When the concentrating module 90 is inserted into the concentrating module insertion hole 78, the auxiliary wheels 102 are supported on the upper part of the concentrating module support 80 to be rolled to facilitate the insertion of the concentrating module 90.

In the modular enrichment bank 70 described with reference to FIGS. 4 to 6, the enrichment module 90 is provided with two rows of upper and lower rows. However, in the embodiment of the present invention, the enrichment bank 70 is provided with only one row or more than two rows. It is also possible to provide by.

7 is a side view of an expanded modular enrichment bank in a volatile organic compound treatment system according to a preferred embodiment of the present invention.

7 shows a modular enrichment bank 70 with four rows of enrichment banks up and down. As described above, the modular enrichment bank 70 according to the present invention has an advantage of being able to expand and contract according to the size of the VOC discharge source 1 because it is easily expandable up and down.

In addition, the number of enrichment banks 3a, 3b, 3c, and 3d constituting the concentrator 3 is provided in two or more according to the size of the VOC discharge source 1, there is an advantage that it is easy to expand.

The volatile organic compound treatment system according to a preferred embodiment of the present invention preferably further comprises a central controller for controlling the entire apparatus.

The central controller grasps the operating status of the entire system and controls the operation of each component.

The main control items of the central control unit are as follows.

The adsorption blower 4 and the oxidation blower 6, which perform the main functions in relation to the operation of the whole system, are operated only when the adsorption or desorption process proceeds. In the case of the oxidation blower 6, the inverter can be started using an inverter. During the cooling process of the enrichment banks 3a, 3b, 3c, and 3d, the cooling process is completed in a short time by maximizing the inverter frequency. It is desirable to.

In the adsorption and desorption process, each of the adsorption and desorption dampers for adjusting the path of the adsorption gas and the desorption gas is preferably provided with a sensor for detecting the opening and closing of the damper, and the opening and closing is performed by the control of the central controller.

In order to control the desorption process, the concentration banks 3a, 3b, 3c, and 3d are equipped with temperature sensors, and the amount of hot air from the catalytic oxidizer 5 is transferred to the concentration banks 3a, 3b, 3c, and 3d. To control the desorption temperature. In this case, the amount of hot air delivered to the concentration banks 3a, 3b, 3c, and 3d can be adjusted by adjusting the amount of hot air circulation to the hot air circulation duct 34. The central controller also controls the temperature in the catalytic oxidizer 5 and the temperature at the outlet of the catalytic oxidizer 5 by measuring the temperature in the catalytic oxidizer 5 to control the heating means 60.

In case of an error in the operation of the entire system, for example in the case of an error in the position of the damper, overheating of the catalytic oxidizer, or overheating of the temperature in the concentration banks 3a, 3b, 3c, 3d, etc. The device may take action such as generating an alarm sound or shutting down the entire system.

On the other hand, in the volatile organic compound enriched catalytic combustion system according to a preferred embodiment of the present invention described above to adjust the air volume and temperature of the desorption hot air during the desorption process, further provided with a temperature control blower for more efficient cooling during the cooling process You can do that.

8 is a block diagram of a volatile organic compound concentrated catalytic combustion system according to another preferred embodiment of the present invention.

According to another preferred embodiment of the present invention, a volatile organic compound concentrated catalytic combustion system includes a pretreatment apparatus (2) for removing dust from contaminants generated from a volatile organic compound (VOC) source (1), a volatile organic compound, and the like. Catalytic oxidizer (3) for adsorbing contaminants, adsorption blower (4) for adsorption, catalytic oxidizer for generating hot air for desorption of concentrator (3) and catalytic oxidation of contaminants such as desorbed organic compounds (5) ), And an oxidation blower 6 for desorption and catalytic oxidation of the concentrating device 3, and furthermore, upon desorption and cooling of the concentrating banks 3a, 3b, 3c, 3d of the concentrating device 3). It includes a temperature control blower 110 and a second external air supply duct 112 for auxiliary control of the amount of air or temperature.

Meanwhile, in FIG. 1, an oxidation blower 6 is provided at the front end of the catalytic oxidizer 5. In FIG. 8, an oxidation blower 6 is provided at the rear end of the catalytic oxidizer 5. However, it should be understood that these differences can be variously modified according to the practice of the invention.

The second outside air supply duct 112 supplies clean air discharged to the outside air or the stack 7 to the system, and the second outside air supply duct 112 supplies the desorption hot air supply duct through the temperature control blower 110. 22). When the temperature of the hot air supplied through the oxidation blower 6 during the desorption process of the concentrated banks 3a, 3b, 3c, and 3d is too high, the second external air supply duct may be operated by the operation of the temperature control blower 110. Since the low temperature air is supplied together to the desorption hot air supply duct 22 from 112, the temperature of the desorption hot air can be adjusted as well as the flow rate of the desorption hot air can be supplemented.

Meanwhile, the second outside air supply duct 112 may include a first branch pipe 114 connected to the desorption hot air supply duct 22 through a temperature control blower 110, a catalytic oxidation device 5, and an oxidation blower 6. ) May be branched into a second branch pipe 116 connected between the second branch pipe 116 and a third branch pipe 118 connected to the front end of the catalytic oxidizer 5.

The second branch pipe 116 receives the outside air supplied from the second outside air supply duct 112 during the cooling process of the concentration banks 3a, 3b, 3c, and 3d through the oxidation blower 6 through the concentration bank 3a, 3b, 3c, 3d). In the desorption process, the outside air supplied through the second outside air supply duct 112 is transferred to the desorption hot air supply duct 22 through the first branch pipe 114 by the temperature control blower 110 and at the same time, the oxidation blower. (6) is transmitted to the desorption hot air supply duct 22 via the second branch pipe 116. At this time, the cooling air blocking damper 50 provided at the rear end of the catalytic oxidizer 5 is in a closed state.

The cooling air supplied through the desorption hot air supply duct 22 passes through the enrichment bank requiring cooling among the condensation banks 3a, 3b, 3c, and 3d, and one end is connected to the desorption hot air exhaust duct 32 and the other end. Is discharged through the adsorption exhaust duct 20 through the cooling air discharge duct 124 connected to the adsorption exhaust duct 20.

Since the air for cooling is supplied by the oxidation blower 6 and the temperature control blower 110, the concentration banks 3a, 3b, 3c, and 3d can be cooled faster.

On the other hand, the second branch pipe 116 is provided with a second branch pipe control damper 118 for controlling the flow of air, the cooling air discharge duct 124 is provided with a cooling air discharge control damper 126. During the cooling process, the cooling air discharge control damper 126 is opened, and the third hot air circulation damper 40 is in a closed state.

The third branch pipe 120 is for lowering the temperature of the catalytic oxidizer 5 by supplying external air when the catalytic oxidizer 5 is overheated. The third branch pipe 120 is provided with a third branch pipe control damper 122.

According to the volatile organic compound enriched catalytic combustion system according to another preferred embodiment of the present invention, the external air is supplied during the desorption process and the cooling process of the enrichment banks 3a, 3b, 3c, and 3d. This becomes possible. In addition, even when the catalytic oxidizer 5 is overheated, external air can be supplied to prevent overheating, thereby enabling efficient control of the overall system.

The above description is merely illustrative of the technical idea of the present invention, and various modifications, changes, and substitutions may be made by those skilled in the art without departing from the essential characteristics of the present invention. will be. Accordingly, the embodiments disclosed in the present invention and the accompanying drawings are not intended to limit the technical spirit of the present invention but to describe the present invention, and the scope of the technical idea of the present invention is not limited by the embodiments and the accompanying drawings. . The protection scope of the present invention should be interpreted by the following claims, and all technical ideas within the equivalent scope should be interpreted as being included in the scope of the present invention.

As described above, according to the present invention, a plurality of enrichment banks are provided, and in some enrichment banks, an adsorption process proceeds, and in other enrichment banks, a desorption process proceeds to catalytic combustion of desorbed volatile organic compounds. The efficiency can be improved and the operating cost can be reduced, while continuous operation is possible.

In addition, according to the present invention, it is easy to manufacture and install the volatile organic compound treatment system and has excellent expandability.

In addition, according to the present invention, it is possible to provide a modular enrichment bank that is easy to manufacture, install and maintain, and has excellent expandability by modularizing the enrichment bank where adsorption and desorption processes are performed.

Claims (11)

In the volatile organic compound treatment system for removing the pollutants generated from the volatile organic compound source (1) for releasing pollutants including volatile organic compounds, The volume of the pollutant is composed of a combination of enrichment banks (3a, 3b, 3c, 3d) that receives the pollutant from the volatile organic compound generating source (1) through a concentrator connecting duct (10) and adsorbs the pollutant. A concentrating device 3 in which the number of concentrating banks 3a, 3b, 3c, and 3d for performing the adsorption process is increased or decreased according to the present invention; An adsorption blower connected to the enrichment banks 3a, 3b, 3c, and 3d of the concentrator 3 through an adsorption exhaust duct 20 to discharge exhaust gas from which the contaminants have been removed to the stack 7. 4); Hot air for desorption of the concentration banks 3a, 3b, 3c, and 3d is supplied to the concentration banks 3a, 3b, 3c, and 3d through the desorption hot air supply duct 22, and the concentration banks 3a and 3b. An oxidation apparatus (5) for thermally oxidizing the contaminants including the volatile organic compounds desorbed by receiving the hot air desorbed from 3c and 3d through a desorption hot air exhaust duct (32); An oxidation blower 6 for driving the hot air; Through the temperature control blower 110 and the temperature control blower 110 for auxiliary control of the amount of air or temperature at the time of desorption or cooling of the concentration bank (3a, 3b, 3c, 3d) of the concentration device (3) A second outside air supply duct 112 connected to the removable hot air supply duct 22; And Controls the order in which the adsorption process and desorption process of the contaminants in each of the concentration banks 3a, 3b, 3c, and 3d are performed, and the temperature of the hot air for desorption supplied from the oxidizing apparatus 5 is controlled. And, a central control device for controlling the operation of the temperature control blower 110 Volatile organic compound concentrated catalytic combustion system comprising a. The method of claim 1, Hot air circulation duct for circulating the hot air discharged from the oxidizing device 5 so that the hot air supplied from the oxidizing device 5 to the concentration banks 3a, 3b, 3c, and 3d is increased to a desorption temperature and then supplied. A volatile organic compound concentrated catalytic combustion system, further comprising (34). The method of claim 1, After the desorption process of the enrichment bank (3a, 3b, 3c, 3d) is completed, an external air supply duct 46 for supplying external air for cooling the enrichment bank (3a, 3b, 3c, 3d) is provided, Volatile organic compound enriched catalytic combustion system, characterized in that the external air supplied through the external air supply duct (46) is discharged after passing through the concentrated bank (3a, 3b, 3c, 3d) that requires cooling. The method of claim 3, wherein The external air supply duct 46 is connected to one end of the desorption hot air supply duct 22, and the external air is driven by the oxidation blower 6 to supply the concentrated banks 3a, 3b, 3c, and 3d. After passing through the desorption hot air exhaust duct 32 through the oxidation blower (6) and is discharged through the cooling air discharge duct 42 connected to the concentrator connection duct 10 Volatile organic compounds concentrated catalytic combustion system. delete The method of claim 1, The oxidation blower 6 is provided at the outlet side of the oxidizing device 5, and the second outside air supply duct 112 is connected to the desorption hot wind supply duct 22. A second branch pipe 116 connected to the front end of the oxidation blower 6, and a third branch pipe 120 connected to the front end of the oxidation device 5 for cooling the oxidation device 5. Volatile organic compound concentrated catalytic combustion system, characterized in that the branching. The method of claim 1, In the cooling process of the enrichment banks 3a, 3b, 3c, and 3d, air passing through the enrichment banks 3a, 3b, 3c, and 3d is connected to the desorption hot air exhaust duct 32 and the other end of the desorption. Volatile organic compound concentrated catalytic combustion system, characterized in that for discharging the cooling air discharge duct 124 connected to the hot air exhaust duct (32). The method according to any one of claims 1 to 4, 6 and 7, The concentrator connecting duct 10 is connected to the concentrating banks 3a, 3b, 3c, and 3d through the concentrating device connecting duct branch pipes 12a, 12b, 12c, and 12d, and the concentrating banks 3a, 3b, 3c and 3d are connected to the adsorption exhaust duct 20 through adsorption exhaust duct branch pipes 16a, 16b, 16c, and 16d to perform the adsorption process. The desorption hot air supply duct 22 is connected to the condensation banks 3a, 3b, 3c, and 3d through the desorption hot air supply duct branch pipes 24a, 24b, 24c, and 24d, and the condensation banks 3a, 3b, 3c and 3d are connected to the desorption hot air exhaust duct 32 through the desorption hot air exhaust duct branch pipes 28a, 28b, 28c and 28d to perform the desorption process. Absorption channel control dampers 14a, 14b, 14c, and 14d are provided in the concentrator connecting duct branch pipes 12a, 12b, 12c, and 12d, and discharge channels are provided in the adsorption exhaust duct branch pipes 16a, 16b, 16c, and 16d. Control dampers (18a, 18b, 18c, 18d), the desorption hot air supply duct branch pipe (24a, 24b, 24c, 24d) is provided with a desorption passage control dampers (26a, 26b, 26c, 26d) and the adsorption process Volatile organic compound concentrated catalytic combustion system characterized in that for controlling the desorption process. A concentrating device including a plurality of concentrating banks for adsorbing contaminants such as volatile organic compounds, an adsorption blower, an oxidizing device for generating hot air for desorbing the condensing bank and thermally oxidizing the desorbed volatile organic compounds and an oxidizing blower In the operating method of the volatile organic compound concentrated catalytic combustion system comprising: (a) an adsorption step of adsorbing the volatile organic compound to the concentrated bank; (b) a desorption step of desorbing the concentrated bank to which the volatile organic compound is adsorbed using hot air; (c) further supplying the outside air of step (b) to the concentration bank to adjust the temperature of the hot air for the desorption; (d) an oxidation step of thermally oxidizing the volatile organic compound desorbed from the concentrated bank; And (e) cooling the enrichment bank by passing external air through the enrichment bank in which the desorption step is performed after step (d). Including but not limited to: When the desorption step is performed in any one of the enrichment banks, the adsorption step is performed in the remaining enrichment banks, and the desorption step is performed sequentially with respect to the enrichment bank, and the enrichment performs the adsorption step. The number of banks is determined according to the capacity of the contaminant. delete The method of claim 9, A hot air circulation step of circulating the hot air discharged from the oxidizing device and raising the temperature to a predetermined temperature before performing the step (b). Method for operating a volatile organic compound concentrated catalytic combustion system further comprises.

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