KR100623498B1 - Equipment for adsorptive concentration of voc(volatile organic compounds)and method and equipment for the energy utilization of desorbed vocs by thermal oxidation - Google Patents

Abstract

The present invention relates to an adsorption concentrating device for volatile organic compounds and an apparatus and method for oxidizing and oxidizing it. The object of the present invention is to use activated carbon adsorbing volatile organic compounds, which is better than conventional activated carbon, and is at least 3 days maximum. By the adsorption concentration and oxidation of volatile organic compounds that process adsorption concentration and oxidation process of volatile organic compounds by separating them into batch separation process instead of continuous process. To provide an apparatus and method for energyizing. The configuration of the present invention is to install one or a plurality of cartridges in accordance with the discharge characteristics of the solvent recovery activated carbon (assembly coal) cartridge of about 100-600kg (average about 500kg) to concentrate at least 3 days to 30 days Adsorption concentration device and the apparatus and method for desorption and combustion by high temperature air (130-170 ℃) is characterized by the technical idea.

Volatile Organic Compounds, Adsorption, Concentration, Granular Activated Carbon, Desorption, Combustion, Waste Gas Energy

Description

Equipment for adsorptive concentration of volatile organic compounds (VOC) and method and equipment for the energy utilization of desorbed VOCs by thermal oxidation}

1 is a schematic and accumulated state diagram of the individual activated carbon cartridge constituting the adsorption type concentrating device of the present invention;

Figure 2 is a front view of the adsorption type concentrating device of the present invention

3 is a plan view of the adsorption concentrating device of the present invention;

4 is a removable and peripheral device of the present invention,

5 is a connection process diagram of the desorption and combustion apparatus of the present invention.

<Description of the symbols for the main parts of the drawings>

(1): adsorption concentrator (2): desorption apparatus

(3): heat exchanger 2 (4): heat exchanger 1

(5): burner (6): burner

(11): flange 12: gasket

(13): upper part of adsorption device (14): lower part of adsorption device

15: cylinder 16: duct

(17): suction fan (21): upper part of detachable device

(22): Removable device lower members (23, 24): Fan

(111): upper flange 112: lower flange

141: inlet

The technical field of the present invention relates to the field of processing specific air pollutants and ozone / smog pollution improvement, and in detail, effectively treats various volatile organic compounds generated by enterprises of large and small industrial complexes in Korea to improve air quality in large cities. At the same time, the present invention relates to an adsorptive concentrating device for volatile organic compounds separated by a concentration step and an oxidation step, and an apparatus and method for oxidizing and oxidizing them.

Volatile organic compounds, along with heavy metals, are substances belonging to certain airborne substances. These are called HAPs (Hazardous Air Pollutants). In the US, 189 substances are selected and 48 substances, including toluene, the most volatile organic compound used in Korea, are selected and regulated.

There are four conventional techniques for treating volatile organic compounds: thermal oxidation, catalytic oxidation, concentrated oxidation, and microbial treatment technology.

The thermal oxidation treatment technology is largely divided into thermal recovery oxidation (regenerative thermal oxidation), thermal recovery oxidation (regenerative thermal oxidation) according to the heat recovery method,

The catalytic oxidation is also divided into two types (recuperative / regenerative catalytic oxidation) according to the heat recovery method. These technologies use heat, making them suitable for large plants with continuous operation.

The concentrated oxidation field means the concentration of activated carbon or zeolite and oxidation of the concentrated volatile organic compound. However, in this case, too, since the concentration and desorption are performed in a continuous process at the same time, the target process is also suitable for the continuous process, and thus the apparatus is complicated and therefore not suitable for use in small and medium-sized businesses.

The treatment using the microorganism is a technique for treating the discharged volatile organic compound by passing through a filter-a solution supporting the microorganism.

The volatile organic compound emission characteristics of SMEs are 100-300m ³ / min in air volume, main volatile organic compounds are toluene, isopropyl alcohol, methyl ethyl ketone, etc., concentration is 100-300ppm, and operating time is 4-10 hours / day. However, the biggest problem is that it is difficult to put a separate manpower in the volatile organic compound treatment device.

As such, most SMEs that emit volatile organic compounds from industrial complexes are not continuous, and the amount of exhaust gas is small and their concentration is low. Therefore, the existing techniques for treating volatile organic compounds are not suitable because they do not meet the operating conditions and consume a lot of energy.

Therefore, most SMEs use activated carbon, but the capacity of activated carbon is so small that it cannot be used for more than 7 days based on working hours. This doesn't increase the amount of activated carbon used. This is because there is a problem that the size of the adsorption tower is too large to use activated carbon having a reverse cycle of 3 months as originally planned.

The purpose of the present invention to solve the above problems is to effectively treat the volatile organic compounds generated in the domestic medium and large industrial complexes to improve the air quality around the industrial complex and at the same time to energize the volatile organic compounds, The present invention provides an enrichment system that can easily increase the capacity of adsorbed activated carbon and concentrate adsorption without special operation and management for at least 3 to 30 days.

It is also an object of the present invention to provide an apparatus and method for energyizing by adsorption concentration and oxidation of a volatile organic compound which is divided into a process of adsorption concentration of volatile organic compounds and an oxidation process rather than a continuous process.

The adsorptive concentrator of the present invention, which achieves the object as described above and accomplishes a problem for eliminating the conventional drawbacks, is configured as a cartridge type by adsorbing for about 3-30 days using high quality solvent recovery activated carbon. One cartridge type concentrator (hereinafter referred to as 'cartridge') is about 500 kg (100-600 kg), which can be accumulated and used according to the exhaust gas conditions of SMEs.

The activated carbon cartridge has a sealed structure filled with activated carbon in the form of a pellet for solvent recovery, and a flange is attached to each of the upper and lower parts of the cartridge, and the flange is inclined such that the upper flange and the lower flange are inclined so that airtightness is maintained by its own load. To be maintained. In addition, a gasket is installed between the upper and lower flanges.

Therefore, the cartridge of the present invention is configured to be sealed so that it is not necessary to connect and surround a separate outer cylinder.

The activated carbon cartridge is to use one of the air volume 50m ³ / min, the treatment concentration 50ppm standard, and in the case of 50m ³ / min, 50ppm one cartridge can be concentrated by adsorption.

The desorption and oxidation (combustion) of the present invention will be described as follows.

A desorption device comprising a desorption device lower member supporting a lower portion of the accumulated activated carbon cartridge and a desorption device upper member covering an upper portion for desorption and energizing the concentrated volatile organic compound adsorbed to the concentrator; A heat exchanger (2) for heat exchange to supply hot air to the lower member of the desorber; A fan for blowing heat-exchanged preheated air; A fan for blowing air containing volatile organic compounds to the heat exchanger 1, which is released from the upper part of the desorption apparatus after desorption; A heat exchanger 1 for preheating by heat exchange with air containing a volatile organic compound; It characterized in that it comprises a; combustor for receiving the air containing the volatile organic compound from the heat exchanger 1 to oxidize (burn) to energy.

The concentration of volatile organic compounds sent to the combustor is 2.5 ~ 5m ³ / min air flow rate (50m3 / min air flow rate used for adsorption concentration per cartridge, 50ppm basis, 1 / 10-1 / 20 of air flow rate used for adsorption) Desorption) is maintained at a maximum treatment concentration of 5000ppm is supplied to the combustor to burn.

In the case of combustion, auxiliary fuel can be used to burn the burner. Of course, the concentration of the desorbed volatile organic compounds is up to 5000ppm and can be self-burned without auxiliary fuel, but the gas is a low calorific value gas, so the combustor that burns it should use a high-rotational efficiency combustor.

The method of adsorbing the activated carbon cartridge, which is the above-mentioned concentrating device, and then desorbing and burning the concentrated cartridge, will be described as follows.

Concentrating the adsorbed volatile organic compounds by installing and accumulating the activated carbon cartridge in an arbitrary number according to a required capacity, and installing the activated carbon cartridge in a volatile organic compound discharge site;

Desorbing the volatile organic compound adsorbed on the activated carbon cartridge by adsorbing the volatile organic compound, collecting the concentrated activated carbon cartridge and installing the activated carbon cartridge in a desorption apparatus, and then passing the hot preheated air heat exchanged in the heat exchanger 2;

Supplying the air containing the volatile organic compound by the desorption to the combustor in a heat-heated state after heat exchange in the heat exchanger 1 to oxidize (burn) the energy;

The combustion flue gas is discharged to the stack through the heat exchanger 1 and the heat exchanger 2.

The preferred temperature of the hot preheated air is 130-170 ° C. If the preheated air is lower than 130 ° C., the amount of desorption is small and the concentration is low. Therefore, auxiliary fuel is required at the time of combustion. If the temperature is higher than 170 ° C., too much amount is desorbed at once and there is a danger of fire.

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

Figure 1 shows a schematic view and accumulated state of the individual activated carbon cartridge constituting the adsorption-type thickener of the present invention, the adsorption-type thickener (1) for adsorption-concentrating the volatile organic compounds of interest as shown is filled with activated carbon It consists of a cartridge type. The shape of the cartridge is basically cylindrical (may be square according to the working environment).

The granular activated carbon filled in the cartridge is filled into a net (not shown) having a plurality of holes formed therein so as not to be lost, and the net is crosswise or other to at least the lower flange 111 of the flange 11 to overcome the load of the granular activated carbon. After installing the reinforcing member (not shown) in the grid shape, it is configured to prevent the loss of the assembled activated carbon by installing a horizontal network here. In addition, a net may be vertically installed at the bottom of the cross-shaped or lattice-shaped reinforcing member to isolate and charge the assembled activated carbon.

This method of connecting the upper and lower parts of the cartridge is to be connected to maintain the airtight by its own load using the flange (11). Particularly, the flange 11 of the present invention allows the upper flange 112 to have a groove formed inside the flange, and the lower flange 111 to form a protrusion processed to fit the groove. That is, a groove is formed in the upper flange 112 of the lower cartridge so that the protrusion of the lower flange 111 of the upper cartridge processed to fit the groove is placed thereon. As such, the activated carbon cartridge of the present invention is itself sealed, so that no separate outer cylinder is required. A gasket 12 is installed between the flange and the flange.

Figure 2 is a front view of the adsorption device of the present invention, Figure 3 shows a plan view of the adsorption type concentrator of the present invention, the inlet 141 is sucked volatile organic compounds when the cartridge of Figure 1 stacked in multiple stages, if necessary And a suction device lower member 14 formed with the inlet and supporting the load of the cartridge; An adsorption device upper member 13 covering an upper portion of the cartridge and connected to one side of the discharge duct 16; A hydraulic or pneumatic cylinder 15 for pressurizing the upper member of the adsorption type concentrator to maintain the airtightness of the cartridge; A duct 16 connected to one side of the upper portion of the adsorption device, through which gas after adsorption passes; The configuration further includes a suction fan 17 provided on the duct path.

The volatile organic compound is composed as described above, the volatile organic compound is adsorbed to the granular activated carbon while the cartridge is introduced into the cartridge through the inlet formed in the lower part of the adsorption device and then rises from the lower part to the upper part. It is discharged through the duct installed in the member. In addition, by further comprising a suction fan installed on the path of the duct through which the gas after being adsorbed connected to one side of the upper member is configured to enhance the suction force of the cartridge and the discharge force of the duct.

4 shows a desorption and peripheral device diagram, in which a collector desorbs activated carbon cartridges, which have been adsorbed and concentrated, at a high temperature (130-170 ° C.) air. . If more than 5 sets of adsorption cartridge systems are used, desorption systems can be installed on site. This is because it is more economical. In the drawing, the desorption apparatus 2 can be seen that the concentrated absorption type concentrator 1 for desorption is stacked between the desorption device upper member 21 and the desorption device lower member 22, and a fan for desorption. Heat exchanger 1 and heat exchanger 2 are connected to the front and rear ends of (FAN, 23, 24), which are heat exchangers 1 and 2 of FIG.

Desorption of volatile organic compounds is carried out by the hot air produced in the heat exchanger 2.

FIG. 5 illustrates a connection process diagram of a desorption and combustion apparatus, and illustrates a process of combusting air including a volatile organic compound desorbed in FIG.

The air containing the desorbed volatile organic compounds is preheated in the heat exchanger 1 (4) and then introduced into the combustor (5).

At this time, the concentration is sufficiently self-burning, but if necessary, the auxiliary fuel is used to burn and supply the burner 6 by operating it.

The combustion gas combusted in the combustor is cooled again through the heat exchanger 1 (4), cooled through the heat exchanger 2 (3), and then discharged into the stack.

By using the activated carbon cartridge of the present invention as described above, it is possible to concentrate adsorption without requiring special operation and management for at least 3 days to 30 days.

In addition, after the adsorption enrichment, the laboratories collect and manage the cartridges, so environmental management is no longer necessary for SMEs.

In addition, the companies that collect the cartridges install new cartridges while collecting activated carbon cartridges, and the collected cartridges are desorbed with high temperature (130-170 ℃) of 1/10 to 1/20 of the amount of air used for adsorption. As you burn, you gain additional energy.

The present invention is not limited to the above-described specific preferred embodiments, and various modifications can be made by any person having ordinary skill in the art without departing from the gist of the present invention claimed in the claims. Of course, such changes will fall within the scope of the claims.

As described above, the present invention concentrator is activated carbon cartridge can be expanded according to the discharge of volatile organic compounds of the plant for at least 3 days up to 30 days, and the adsorption can be concentrated without the need for special operation and management.

In addition, since the discharge of volatile organic compounds is managed by the collecting company, small and medium-sized companies that emit volatile organic compounds only need to replace activated carbon cartridges, so they are easy to operate and easy to manage, so ozone / smog around large cities and industrial complexes caused by volatile organic compounds That can greatly improve pollution,

Activated carbon cartridge collector is a useful invention with the advantage that can be obtained by the replacement of the cartridge and a large amount of high-quality energy because the cartridge is concentrated in a large amount of volatile organic compounds is an invention that is expected to use in industry.

Claims (10)

In the volatile organic compound concentrator, It consists of a sealed cartridge type thickener filled with pelletized activated carbon, which has flanges and gaskets formed on the upper and lower parts of the sealed structure for the multi-stage stacking, and at least a lower portion of the activated carbon prevents the loss of activated carbon. Adsorption type concentrator of volatile organic compounds, characterized in that the network is installed after the reinforcing member is installed. The method of claim 1, An inlet port through which the volatile organic compound is sucked when the cartridge is stacked in multiple stages as necessary, and an inlet device lower member which supports the load of the cartridge; An upper portion of the adsorption device which covers an upper portion of the cartridge and is connected to one side of the discharge duct; A hydraulic or pneumatic cylinder pressurizing the upper member of the adsorption device to maintain the airtightness of the cartridge; A duct connected to one side of the upper portion of the adsorption device, through which gas after the adsorption passes; An adsorption type concentrating device for volatile organic compounds, characterized in that it further comprises a suction fan installed on the duct path. The method of claim 2, The structure of the flange is an adsorption type of volatile organic compound, characterized in that the upper flange to the groove formed in the flange so as to maintain the air tight to the self-load by using the flange, the lower flange is formed with a protrusion processed to fit the groove Thickener. The method of claim 1, Activated carbon filled in the activated carbon cartridge is adsorptive concentration apparatus of volatile organic compounds, characterized in that 100-600kg filled with activated carbon to process a minimum concentration of 50ppm when the air flow rate 50m ³ / min. The method of claim 1, Adsorption-type concentrated device of volatile organic compounds, characterized in that the granules (pellet) filled with activated carbon is made of one selected from a cylindrical structure or a square structure. A desorption device comprising a desorption device lower member supporting a lower portion of the accumulated activated carbon cartridge and a desorption device upper member covering an upper portion for desorption and energy of the concentrated volatile organic compound adsorbed by the concentrator according to claim 2. ; A heat exchanger (2) for exchanging heat for supplying hot air to the lower member of the desorber; A fan for blowing heat-exchanged preheated air; A fan for blowing air containing volatile organic compounds to the heat exchanger 1, which is released from the upper part of the desorption apparatus after desorption; A heat exchanger 1 for preheating by heat exchange with air containing a volatile organic compound; An apparatus for oxidizing and energizing an adsorption-type concentrator of a volatile organic compound, comprising: a combustor configured to receive air containing a volatile organic compound from a heat exchanger 1 and oxidize (burn) the same. The method of claim 6, An apparatus for oxidizing and oxidizing an adsorption type concentrating device for volatile organic compounds, characterized in that the burner further comprises a burner using auxiliary fuel. After providing the concentrating device and the energyizing device according to any one of claims 1 to 7, the activated carbon cartridge is connected and accumulated in any number according to the required capacity and installed on the volatile organic compound discharge site to adsorb volatile organic compounds. A concentration step; Desorbing the volatile organic compound adsorbed on the activated carbon cartridge by adsorbing the volatile organic compound, collecting the concentrated activated carbon cartridge and installing the activated carbon cartridge in a desorption apparatus, and then passing the hot preheated air heat exchanged in the heat exchanger 2; Supplying the air containing the volatile organic compound by the desorption to the combustor in a preheated state after heat exchange in the heat exchanger 1 to oxidize (burn) the energy; A method of oxidizing and energizing an adsorption-type thickener of a volatile organic compound, characterized in that it comprises the step of discharging the burned flue gas through the heat exchanger 1 and the heat exchanger 2 as a stack. The method of claim 8, The high temperature preheating air is 130-170 ° C. A method of oxidizing and oxidizing an adsorption type concentrating device for volatile organic compounds. The method of claim 8, The concentration of air supplied to the combustor is a method of oxidizing the energy of the adsorption concentration device of the volatile organic compound, characterized in that the maximum concentration of 5000ppm to air volume 2.5-5m ³ / min.

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