KR200333766Y1 - Activated carbon repreduction system for volatility organic compound exclusion - Google Patents

Abstract

The present invention relates to an apparatus for regenerating activated carbon by removing volatile organic compounds adsorbed in activated carbon.

The present invention is intended to regenerate activated carbon by heating the activated carbon by hot air to evaporate the VOC trapped in the activated carbon and completely removing the vaporized VOC through a combustor and a catalytic means.

Therefore, the present invention is to heat the activated carbon by the hot air can prevent the risk of fire, and the structure is simple, the device can be miniaturized. In addition, the entire activated carbon is uniformly heated by hot air to evaporate the VOC adsorbed on the activated carbon and then passes through the combustor and the catalytic means. Therefore, the regeneration efficiency of the activated carbon can be remarkably increased by completely removing the VOC adsorbed on the activated carbon. have.

Description

Activated carbon repreduction system for volatility organic compound exclusion

The present invention relates to an apparatus for regenerating activated carbon by removing volatile organic compounds adsorbed in activated carbon.

In particular, by providing an activated carbon regeneration device of a tropical flow type that passes the activated carbon while heating the air with a heat source such as a burner or an electric heater and circulating the heated air at this time, the size of the device can be drastically reduced, and the fire The present invention relates to an activated carbon regeneration device for removing volatile organic compounds, which can eliminate the risk factors, and above all, to improve the activated carbon regeneration efficiency such as effectively removing volatile organic compounds in activated carbon within a short time.

In general, Volatility Organic Compound (VOC) is a carbon compound except carbon monoxide, carbon dioxide, carbonic acid, metallic carbonate and ammonium. It is an organic compound that raises the smog phenomenon.

Representative materials include 318 kinds of photochemical reactions such as benzene, toluene, propane, butane, nucleic acid, etc., which are larger than ethane, and petrochemical products and organic solvents having a true vapor pressure of 1.5 Pais or more. .

VOC is not only widely used as a solvent in industry, but also contained in organic gas emitted from chemical and pharmaceutical factories, automobile coating booths and plastic drying processes, and it is surrounded by low-boiling liquid fuels, paraffin, olefins and aromatic compounds. Almost all hydrocarbons used in

These VOCs are not only toxic chemicals, but also the entire structure of photochemical oxides, the stratospheric ozone depleting substances, and the substances affecting global warming. Therefore, the removal of VOCs from organic gases containing VOCs and released into the atmosphere is an environmental protection. Is important.

As mentioned above, the apparatus for removing VOC is essentially employed in chemical and pharmaceutical related factories, automobile coating booths, plastic handling factories, and the like.

6 is a schematic view showing an example of an automobile paint booth to which a general VOC filtration device is applied, and FIG. 7 is a perspective view showing an example of a VOC filtration device used at this time.

As shown, the VOC filtration device 100 is installed on the side of the blower 120 of the coating booth 110 and has a structure in which the activated carbon 150 is filled in the enclosure 140 covered by the reticular member 130. .

Here, the activated carbon is prepared by treating wood, lignite, peat, etc. with a chemical agent such as zinc chloride or phosphoric acid as an activator, and drying or activating charcoal with water vapor to produce a horizontal or granular state.

Such activated carbon mainly absorbs gas and moisture as an adsorbent, or else functions to recover solvent, purify gas, or decolorize the gas.

The process of filtering the VOC in the exhaust gas by the existing VOC filtration device is as follows.

When the exhaust gas is discharged through the exhaust line of the air blower 120 and passes through the activated carbon 150 of the VOC filtration apparatus 100, VOC and moisture in the exhaust gas are adsorbed onto the activated carbon 150 and filtered.

However, in the existing VOC filtration apparatus as described above, the VOC or moisture adsorbed on the activated carbon cannot be removed by itself, and thus, the filtration function of the activated carbon is lost after a certain filtration time. There is a hassle and inefficiency that needs to be exchanged.

Moreover, the existing VOC filtration device filters VOC and moisture, but cannot remove VOCs in recent years, and thus has limitations in terms of fundamental environmental pollution prevention.

In view of the above, Korean Patent No. 343804 proposes a technique for semi-permanently using activated carbon by regenerating activated carbon after a certain period of time.

The above patent technology is to embed the heater directly in the activated carbon to heat the activated carbon by the heat of the heater, so that the VOC trapped in the activated carbon is burned and removed in the process of incineration after passing through the incinerator. Due to the long regeneration time, the use time of the paint booth is limited. Especially, since the heater as the heat source is in direct contact with the activated carbon, there is always a risk of ignition due to a partial temperature rise.

In addition, since the thermal conductivity of the activated carbon itself is extremely low, there is a problem that the temperature is not evenly conducted to the activated carbon even when heated for a long time, and this problem affects the VOC regeneration efficiency, so that the heater is evenly distributed on the activated carbon bundles. The size of the device is larger and the efficiency does not have structural problems that are not as expected.

The present invention is provided to solve the conventional problems as described above, the VOC in the exhaust gas discharged from the coating booth is adsorbed and filtered in the course of passing through the activated carbon, and the VOC collected in the activated carbon is evaporated by heating the activated carbon by hot air. The evaporated VOC is completely removed by passing through the combustor and catalyst means, which can prevent the risk of fire, miniaturize the equipment, and completely remove the VOC in the activated carbon in a short time. An object of the present invention is to provide an activated carbon regeneration device for removing volatile organic compounds.

1 is a front sectional view showing the overall configuration of the activated carbon recycling apparatus according to the present invention

2 is a cross-sectional view taken along the line A-A of FIG.

3 is an enlarged view of a combustor according to the present invention

4 is a cross-sectional view taken along the line B-B of FIG.

5 is a cross-sectional view of the catalytic device according to the present invention

6 is a schematic view showing an example of an automobile paint booth applying a general VOC filtration device

7 is a perspective view showing an example of the VOC filtration device applied to FIG.

<Explanation of symbols for main parts of drawing>

1.chamber --- 11.inlet

2. Exhaust Fan

3. Exhaust duct

4. Activated Carbon

5. Hot air supply means --- 51. Heater or burner, 52. Hot air supply pipe

6. Opening and closing damper

7. Discharge Fan

8.Combuster --- 81.Body body, 83.Closed plate, 84. Heating bar, 85. Diaphragm

9. Catalyst means

10. sump

The activated carbon regeneration apparatus for removing volatile organic compounds provided in the present invention includes a chamber having an inlet connected to a paint booth at a lower portion thereof and having a space therein, an exhaust fan installed at an upper side of the space portion of the chamber, and in communication with the exhaust fan. In the exhaust duct provided on the upper side of the chamber, the activated carbon is filled in the reticulated container while being repeatedly arranged in the shape of a fan throughout the lower part of the inner space of the chamber, and activated carbon is filled with hot air generated by the heater or burner. Hot air supply means for supplying activated carbon through a hot air supply pipe disposed in the lower portion of the exhaust gas, an open / close damper installed in the exhaust duct, an exhaust fan connected to the exhaust duct below the open / close damper, and a combustor connected to the exhaust fan. It is characterized in that the catalyst means connected to the combustor.

In addition, the combustor has a double sealed structure having a space between the outer cylinder and the inner cylinder, a cylinder having an inlet and an outlet, a heating bar disposed up and down inside the inner cylinder of the cylinder, and a top and bottom inside the inner cylinder of the cylinder. It is characterized by consisting of a plurality of diaphragm horizontally installed in a zigzag at a predetermined interval.

The present invention as described above is the VOC adsorbed on the activated carbon in the process of the exhaust gas discharged from the coating booth through the inlet through the activated carbon and the VOC adsorbed on the activated carbon is hot air supplied by the hot air supply means activated carbon By heating activated carbon through it, it is separated from activated carbon and evaporated. The evaporated VOC is introduced into the combustor by the discharge fan and burned, and the residual gas after combustion is removed in the course of passing through the catalytic means.

Therefore, the present invention as described above is to heat the activated carbon by hot air, so that the risk of fire can be prevented and the structure is simple, and the device can be miniaturized. Since the VOC adsorbed on the evaporator passes through the combustor and the catalyst means, the VOC adsorbed on the activated carbon can be completely removed to significantly increase the regeneration efficiency of the activated carbon.

Hereinafter, a specific embodiment of the present invention will be described in detail with reference to the drawings.

1 is a front sectional view showing the overall configuration of the activated carbon regeneration apparatus according to the present invention.

As shown, the chamber 1 has a rectangular cylindrical shape having an inlet 11 connected to a paint booth at a lower portion thereof and a space portion therein.

An exhaust fan 2 is installed above the inner space of the chamber 1 for discharging the exhaust gas discharged from the paint booth, and an exhaust duct 3 communicates with the exhaust fan 2 above the chamber 1. Is connected.

In the lower part of the inner space of the chamber 1, the activated carbon 4 filled in the reticular container is provided obliquely and continuously, and is repeatedly arranged in the shape of a ∧. The activated carbon 4 is introduced through the inlet 11 and serves to directly adsorb VOCs in the exhaust gas discharged to the exhaust duct 3.

The lower portion of the activated carbon 4 is provided with hot air supply means 5 for supplying hot air to pass through the activated carbon 4.

Hot air supply means (5) is installed outside the chamber (1) is a burner or heater 51 for directly generating hot air, and disposed under the activated carbon 4 to be connected to the burner or heater 51 and a plurality of The hot air supply pipe 52 is provided with a discharge hole 52a (see Fig. 2).

The exhaust duct 3 is provided with an opening / closing damper 6 for opening and closing the exhaust duct 3.

The exhaust duct 3 below the open / close damper 6 is connected to the discharge fan 7, and the discharge fan 7 is connected to the combustor 8.

The combustor 8 is to burn and remove the VOC evaporated and discharged from the activated carbon 4 by high heat, and as shown in FIG. 3, a space portion between the circular outer cylinder 81a and the inner cylinder 81b. The double cylinder structure 81 is formed.

The upper and lower front ends of the outer cylinder 81a and the inner cylinder 81b are closed by the sealing plate 83 so that the cylinder 81 is in a sealed state. An inlet I through which hot air containing VOC flows is formed in the upper portion of the outer cylinder 81a and the lower portion of the inner cylinder 81b of the combustor 8, and the inner cylinder 81a and the inner cylinder 81b are formed. The discharge port O is formed in the upper part of the cylinder 81b.

A plurality of heating bars 84 are arranged vertically inside the inner cylinder 81b, and upper and lower front ends of these heating bars 84 are fixed to upper and lower sealing plates 83.

Inside the inner cylinder 81b, semi-circular diaphragms 85 are fixed horizontally in a zigzag at regular intervals up and down. Here, the diaphragm 85 is provided in the inner cylinder 81 b at regular intervals up and down to maximize the VOC residence time in the inner cylinder 81 b.

Combustor 8 of the present invention is to maintain the internal temperature of about 380-400 ℃ to maximize the combustion efficiency of the VOC.

The outlet O of the combustor 8 is connected with a catalytic means 9 for removing residual gases (NOx, SOx, Co) generated after the VOC is combusted in the combustor 8.

The catalyst means 9 is filled with a ceramic 92 having a plurality of through holes 92 a in the cylinder 91, and platinum is plated on the wall of the through holes 92 a, and the catalyst means 9 is already provided. Use it.

The lower part of the catalyst means (9) is provided with a sump (10) for collecting water generated from the catalyst means (9), the exhaust pipe (OP) is connected to the upper part of the sump (10).

The process of removing the VOC adsorbed on the activated carbon 4 and regenerating the activated carbon by the activated carbon regeneration device (VD) for removing the volatile organic compounds of the present invention as described above is as follows.

Activated carbon regeneration device (VD) of the present invention is installed in the position of the conventional air blower connected to the painting booth.

In the process of performing the painting or drying process in the coating booth, as shown by the virtual line in Figure 1 in the present invention to open and close the damper 6 installed in the exhaust pipe (3) to operate the exhaust fan (2). In this state, the exhaust gas discharged from the coating booth is introduced through the inlet 11 of the chamber 1 and passes through the activated carbon 4, and the VOC in the exhaust gas is adsorbed and filtered on the activated carbon 4, and the filtered exhaust gas. Is discharged through the exhaust duct (3).

When a certain amount of VOC is adsorbed to the activated carbon 4 by operating the coating booth for a predetermined time, the operation of the coating booth is stopped and an operation for removing the VOC adsorbed to the activated carbon 4 is performed.

In order to perform the operation for removing the VOC, as shown by the solid line in FIG. 1, the exhaust fan 2 is first stopped and the opening / closing damper 6 is closed so that hot air is discharged to the outside through the exhaust duct 3. To prevent them. Then, the combustor 8 is operated to preheat the temperature in the combustor to 380-400 ° C. and operate the burner or the heater 51 and operate the exhaust fan 7.

In such a state, hot air generated from the burner or the heater 51 is supplied to the activated carbon 4 through the hot air supply pipe 52 to pass through the activated carbon 4, and the activated carbon 4 is in uniform contact with the hot air. This causes the entire activated carbon 4 to rise to 100-150 ° C., a temperature suitable for the adsorbed VOCs to evaporate.

When the temperature of the activated carbon 4 rises, the VOC adsorbed on the activated carbon 4 is evaporated and separated from the activated carbon 4, and the vaporized VOC is released through the inlet I through the action of the discharge fan 7. Flow into

The VOCs introduced into the combustor 8 are combusted in the course of passing through the combustor 8 having a longer residence time by the diaphragm 85, and NOx, SOx, and Co, which are residual gases after being combusted, are discharged through the outlet O. It is discharged and decomposed while passing through the through hole 92 in the catalyst means 9 plated with platinum. In other words, platinum, which acts as a catalyst in the catalytic means 9, strongly attracts oxygen around the platinum at an active temperature to form a kind of high-concentration oxygen tent, so that the oxygen atom has a weak active covalent bond with platinum. In this state, when a flammable molecule such as a hydrocarbon flows in, it reacts with oxygen having an active charge chemisorbed on platinum, and is completely oxidized to CO₂ and H₂O (water vapor) and is separated from the catalyst surface.

Thereafter, the water vapor discharged from the catalyst means 9 is collected in the sump container 10 and CO2 is discharged through the exhaust pipe OP.

In the present invention as described above, the operation of the burner or the heater 51 or the opening and closing damper 6 and the combustor 8 is controlled to the optimum operating state by an electronic or electrical method, so all processes are performed automatically.

The present invention is intended to regenerate activated carbon by heating the activated carbon by hot air to evaporate the VOC trapped in the activated carbon and completely removing the vaporized VOC through a combustor and a catalytic means.

Therefore, the present invention is to heat the activated carbon by the hot air can prevent the risk of fire, and the structure is simple, the device can be miniaturized. In addition, the entire activated carbon is uniformly heated by hot air to evaporate the VOC adsorbed on the activated carbon and then passes through the combustor and the catalytic means. Therefore, the regeneration efficiency of the activated carbon can be remarkably increased by completely removing the VOC adsorbed on the activated carbon. have.

Claims (2)

A chamber 1 having an inlet 11 connected to a paint booth at a lower portion thereof and having a space therein, an exhaust fan 2 provided above the space portion of the chamber 1, and a chamber in communication with the exhaust fan 2; An exhaust duct (3) provided on the upper side of the chamber (1), comprising: activated carbon (4) filled in a reticulated container while being repeatedly arranged in a ∧ shape over the entire lower portion of the inner space of the chamber (1); Hot air supply means (5) for supplying hot air generated by the heater or burner (51) to the activated carbon (4) through the hot air supply pipe (52) disposed below the activated carbon (4), and the exhaust duct (3). ), An open / close damper 6, a discharge fan 7 connected to the exhaust duct 3 under the open / close damper 6, a combustor 8 connected to the discharge fan 7, and a combustor ( Activated carbon regeneration apparatus for removing volatile organic compounds, characterized in that the catalyst means (9) connected to 8). 2. The combustor (8) according to claim 1, wherein the combustor (8) has a double sealed structure having a space (81c) between the outer cylinder (81a) and the inner cylinder (81b), and the inlet (I) and the outlet (O). Zigzag at regular intervals up and down inside the cylinder 81 having, the heating bar 84 disposed up and down inside the inner cylinder 81b of the cylinder 1, and the inner cylinder 81a of the cylinder 81 Activated carbon regeneration device for removing volatile organic compounds, characterized in that consisting of a plurality of horizontal plates (85).