KR100827376B1 - Regenerative apparatus for activated carbon - Google Patents

Abstract

A regeneration apparatus for activated carbon is provided to reduce a danger of explosion due to VOCs(Volatile Organic Compounds) or activated carbon in the regeneration process, enable VOC gas to be burnt at low temperatures, and operate the regeneration apparatus by using only a small quantity of fuel in the initial temperature rising process. In an activated carbon regenerating apparatus for removing VOC(Volatile Organic Compound) gas, the activated carbon regenerating apparatus comprises: a combustion chamber(20) for burning the VOC gas; first and second regenerative parts(30) including first and second supply pipes(38,38') on which first and second supply valves(35,35') are formed to supply the VOC gas, first and second air supply pipes(39,39') on which first and second air supply valves(36,36') are formed to supply air required during the combustion of the VOC gas in the combustion chamber, and first and second exhaust pipes(40,40') on which first and second exhaust valves(37,37') are formed to exhaust combustion gas that has been burnt in the combustion chamber, the regenerative parts supplying the preheated VOC gas into the combustion chamber by preheating the VOC gas that has been supplied through the first and second supply pipes; an exhaust pipe(45) for exhausting a portion of the combustion gas that has been exhausted through the first and second exhaust valves to the outside; a first pipe(42) which is connected to the exhaust pipe, and on which a circulation fan(44) is installed to circulate a portion of the combustion gas that has not been exhausted through the exhaust pipe towards activated carbon(10); and a second pipe(41) for moving the separated VOC gas to the combustion chamber after separating VOC gas adsorbed onto the activated carbon using the combustion gas that has been removed by the circulation fan. Further, a burner for setting up an initial temperature is installed in the combustion chamber.

Description

Activated carbon regeneration device {regenerative apparatus for activated carbon}

1 is a schematic diagram showing an activated carbon regeneration device according to a first embodiment of the present invention.

2 is a second schematic diagram showing an activated carbon regeneration apparatus according to a first embodiment of the present invention.

3 is a flowchart illustrating a regeneration method of an activated carbon regeneration device according to a first embodiment of the present invention.

[Explanation of symbols for main parts of drawing]

10: activated carbon 20: combustion chamber

21: burner 22: hot gas intake valve

23: suction pipe 30: the first heat storage unit
30 ': second heat storage unit 31: first heat storage material
31 ': second heat storage material 32: first heat storage material
32 ': second heat storage material 33: first heat storage material
33 ': 2nd heat storage material 34: 1 catalyst material
34 ': 2 catalyst 35: 1 supply valve
35 ': 2 supply valve 36: 1 air supply valve
36 ': 2 air supply valve 37: 1 discharge valve
37 ': 2 discharge valve 38: 1 supply line
38 ': 2 supply line 39: 1 air supply line
39 ': 2 air supply pipe 40: 1 exhaust pipe
40 ': 2nd discharge pipe 41: 2nd piping
42: first pipe 43: exhaust fan
44: circulation fan 45: exhaust pipe
46: thermometer

delete

delete

delete

delete

delete

delete

delete

delete

The present invention relates to an activated carbon regeneration device, and more particularly, to remove the VOC gas adsorbed on the activated carbon, if the activated carbon can be regenerated without separating from the VOC removal device, a combustion gas having a low oxygen concentration is used as the VOC desorption gas of the activated carbon. Therefore, there is little risk of explosion by VOC or activated carbon during the regeneration process, and the heat storage unit and the catalyst unit are formed therein so that the VOC gas can be burned at a low temperature, and the combustion gas generated during the combustion of the VOC gas is a heat source. The present invention relates to an activated carbon regeneration device that can operate with only a small amount of fuel used in the initial temperature raising process.

In general, the detoxification treatment of wastewater and waste gas discharged from factories and the like has been an important problem in the past, but the pollution problem has recently emerged as the most urgent problem in recent years.

These harmless treatment methods have been studied separately, but the treatment using activated charcoal is extremely big.

Activated charcoal has a very high adsorption power, so if a desirable treatment agent or adsorption is sufficient, the adsorption power is saturated and regeneration is necessary to use it again.

Conventionally, a method of revitalizing and regenerating activated carbon which has been used is to raise activated carbon in a rotary chiron heated outside by heavy oil burning to 800 ° C or above to carbonize the adsorbent material and blow steam at high temperature. There was a method of regenerating by water gas reaction, but in order to complete the necessary regeneration treatment, heating was required for several hours at high temperature, considerable fuel consumption was required, and the cost of equipment was increased, resulting in severe loss of activated carbon itself.

In addition, in order to regenerate activated carbon, activated carbon is separated from a volatile organic compound removal system. When the VOC or pyrolysis gas of the activated carbon encounters oxygen in the air, an explosion may occur, and the activated carbon is separated for regeneration. During this time, the problem of volatile organic compound removal system is stopped for a long time.

The present invention has been devised to solve the above problems, the object of the present invention is to remove the activated carbon when removing the VOC gas adsorbed on the activated carbon, it is possible to regenerate, so there is little risk of explosion, the VOC gas A heat storage unit and a catalyst unit are formed therein to enable combustion at a low temperature, and since the combustion gas generated from the combustion of the VOC gas is used as a heat source, an activated carbon regeneration device capable of operating with only a small amount of fuel used in the initial temperature raising process is provided. The purpose is to provide.

The present invention for achieving the above object is an activated carbon regeneration apparatus for removing VOC (Volatile Organic Compounds) gas, the combustion chamber in which the VOC gas is burned; A supply pipe formed with a supply valve to supply the VOC gas, an air supply pipe formed with an air supply valve to supply air required for combustion of the VOC gas in the combustion chamber, and a discharge valve for discharging the combustion gas combusted from the combustion chamber; A heat storage unit including a discharge pipe formed and preheating the VOC gas supplied through the supply pipe to supply the combustion chamber; An exhaust pipe for discharging a part of the combustion gas discharged through the discharge valve to the outside; A first pipe connected to the exhaust pipe and provided with a circulation fan so that some combustion gas not discharged through the exhaust pipe circulates to the activated carbon side; A second pipe installed to move the combustion gas moved by the circulation fan to the combustion chamber by separating the VOC gas adsorbed on the activated carbon; The combustion chamber maintains the initial temperature of the combustion chamber at 300 ° C to 400 ° C by a burner, and a catalyst material is formed inside the heat storage part so that the VOC gas can be burned at a low temperature in the combustion chamber. The unit is arranged of a preheating one heat storage material, a second heat storage material, a catalyst material three heat storage material, the hot gas intake valve formed with a hot gas intake valve for sucking the high pressure gas generated after the combustion of the combustion chamber is connected to the first pipe, When opening the 1st supply valve of the 1st heat storage unit, VOC gas flows into the 1st heat storage unit through the 1st supply pipe in which the 1st supply valve is formed, and after it is preheated and oxidized by the heat storage material and the catalyst material in the 1st heat storage unit, it enters the combustion chamber. Combustion gas combusted in the combustion chamber flows into the second heat storage unit to heat the heat storage material and the catalyst material, and then is discharged through the 2 discharge pipes having the 2 discharge valves installed, and after 1 minute to 3 minutes, the first supply valve The VOC gas flows into the second heat storage unit by closing and opening the 2nd supply valve, and the introduced VOC gas flows into the combustion chamber after preheating and oxidation by the heat storage material and the catalyst material in the second heat storage unit, and then flows into the combustion chamber. The burned combustion gas is introduced into the first heat storage unit, and heats the heat storage material and the catalyst material in the first heat storage unit, and then the circulation process discharged through the first discharge pipe in which the first discharge valve is installed is repeated.

The present invention having such a feature may be more clearly described through the preferred embodiment accordingly.

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

1 is a first schematic view showing an activated carbon regeneration device according to a first embodiment of the present invention, Figure 2 is a second schematic view showing an activated carbon regeneration device according to a first embodiment of the present invention, Figure 3 is 1 is a flowchart illustrating a regeneration method of the activated carbon regeneration device according to the first embodiment.

Referring to FIG. 1, a first schematic view showing an activated carbon regeneration device relates to regeneration of activated carbon that is filtered after conversion of VOC polluted gas into clean gas. The VOC gas adsorbed on the activated carbon 10 may be 160 ° C. to 170 ° C. When heated, the VOC gas is separated from the activated carbon 10.

Thus, the separated VOC gas is moved to the supply pipes 38 and 38 'provided with the supply valves 35 and 35' through the second pipe 41 having a low carbon dioxide concentration. The first heat accumulator 30 is introduced into the first heat accumulator 30 and the introduced VOC gas is preheated by the first heat accumulator 31 and the first heat accumulator 32 to form the first heat accumulator 32. It passes through 1) and moves to one catalyst material 34.

Each of the first and second heat accumulators 30 and 30 'may include first and second heat accumulators 31 and 31', and first and second heat accumulators 32 and 32 '. The two catalysts 34 and 34 'and the first and second three heat storage materials 33 and 33' are arranged in this order.

The first and second catalysts 34 and 34 'are formed to cause oxidation of the VOC gas, and the temperature of the first and second catalysts 34 and 34' for oxidation is maintained at 300 ° C to 400 ° C. In addition, the VOC gas passed after the oxidation in the first catalyst material 34 passes through the first third heat storage material 33 and enters the combustion chamber 20, and the introduced VOC gas is combusted in the combustion chamber 20.

In addition, the air required for the combustion of the combustion chamber 20 is introduced into the first and second air supply pipes (39, 39 ') connected from the outside is introduced by opening the one air supply valve 36 of the first heat storage unit (30). Then, the first, second, and third heat storage materials 31, 32, and 33 inside the first heat storage part 30 are introduced into the combustion chamber 20.

The combustion chamber 20 is heated inside by the burner 21 disposed inside the combustion chamber during the initial operation of the activated carbon regeneration apparatus, and the VOC gas oxidized by the first and second catalysts 34 and 34 '. The combustion temperature is 400 ℃ ~ 500 ℃ after the temperature is increased to the burner 21 for the first 20 to 30 minutes, the burner 21 is stopped, after the stop by the hot gas generated during the combustion of VOC gas It will be able to maintain the temperature.

Here, the heat storage material is to maintain the temperature of the catalyst material.

The combustion gas of the VOC gas combusted in the combustion chamber 20 is discharged through the second heat storage unit 30 ', and the inside of the second heat storage unit 30' is preheated due to the discharged combustion gas. It is discharged by the two discharge valve 37 'installed in the discharge pipe 40', and the discharge valve 37 'of the second heat storage unit 30' is opened when the combustion gas is discharged, and the two supply valve 35 ' ) And the two air supply valve 36 ′ are closed in opposition to the first heat storage unit 30.

The opening and closing of each of the valves 35, 35 ', 36, 36', 37 and 37 'is performed when the VOC gas is introduced into the first heat storage unit 30 at intervals of 1 to 3 minutes and the second heat storage unit ( 30 '), which is circulated to the case where it is introduced, and a sensor is attached to each of the valves 35, 35', 36, 36 ', 37, 37' to be operated by the control system.

The discharged combustion gas is partially discharged to the outside through an exhaust fan 43 formed in the exhaust pipe 45, and some of the combustion gas except the discharged combustion gas passes through the intake valve 22 to the first pipe 42. It is moved to the, through the circulation fan 44 formed in the first pipe 42 is moved to the activated carbon 10 again, the temperature of the combustion gas to separate the VOC gas adsorbed on the activated carbon 10 160 The thermometer 46 is formed to maintain the temperature at ℃ ~ 170 ℃, the hot gas inlet pipe is installed with a hot gas inlet valve 22 for adjusting the temperature by moving the hot gas in the combustion chamber when the temperature of the combustion gas is lower than the proper temperature It is the structure in which 23 is provided.

Referring to FIG. 2, a second schematic view showing an activated carbon regeneration apparatus according to a first embodiment of the present invention shows that VOC gas flows through a path different from that of FIG. 1.

After the separation of the VOC gas adsorbed on the activated carbon 10 in FIG. 1 and the first and second supply pipes 38 and 38 'through the second pipe 41 are the same, the second supply pipe 38' The VOC gas is introduced into the second heat storage unit 30 'through the second supply valve 35'.

In this inflow process, the internal temperature of the second heat storage unit 30 'is increased due to the combustion gas after combustion of the VOC gas introduced through the first heat storage unit 30 in the combustion chamber 20, and the first heat storage unit ( Since the temperature of 30) is lowered, it is circulated in units of 1 to 3 minutes.

When the VOC gas is introduced into the second heat storage unit 30 ', the second supply valve 35' and the second air supply valve 36 'are opened, and the second discharge valve 37' is closed, and the first heat storage unit ( The one supply valve 35 and the one air supply valve 36 of 30 are reversely closed, and the one discharge valve 37 is opened.

Thus, the introduced VOC gas is preheated by the second first heat storage material 31 ′ and the second second heat storage material 32 ′ and moves to the second catalyst material 34 ′ through the second heat storage material 32 ′. After the oxidation is caused by the second catalyst material 34 ', it is preheated while passing through the second third heat storage material 33' and introduced into the combustion chamber 20, and the VOC gas introduced into the combustion chamber 20 is oxidized. It is possible to burn at 400 ℃ ~ 500 ℃ by the catalytic action, the air required for combustion is introduced into the two air supply pipe (39 ') through the two air supply valve (36').

Since the combustion gas of the VOC gas is discharged through the first heat storage unit 30, the inside of the first heat storage unit 30 is preheated by the combustion gas when discharged, and the first discharge valve 37 is opened. VOC gas is discharged to the exhaust pipe (45) through the first discharge pipe (40), a part of the combustion gas is moved to the first pipe (42) through the intake valve 22 is formed in the first pipe (42) By circulating through the 44 it is moved to the activated carbon (10).

The circulating action of the VOC gas is each valve (35, 35 ', 36, 36', 37, 37 ') in units of 1 to 3 minutes depending on the temperature of the first and second heat accumulators (30 and 30'). Opening and closing is made, the temperature of the combustion chamber 20 is characterized in that the temperature of the combustion chamber 20 is preserved by the hot gas generated in the combustion of the VOC gas after heating 400 ℃ ~ 500 ℃ by the burner 21 at the first start-up Valves 35, 35 ', 36, 36', 37, 37 ', thermometer 46, pipes 38, 38', 39, 39 ', 40, 40', 41, 42 and the like. The temperature sensor is attached and automatically made by the control system.

3 is a flowchart illustrating a regeneration method of an activated carbon regeneration device according to a first embodiment of the present invention.

In step S110, the VOC gas adsorbed on the activated carbon 10 is separated by the combustion gas at 160 ° C. to 170 ° C., and is moved to the first and second supply pipes 38 and 38 ′ through the second pipe 41. When the VOC gas is moved through the second pipe 41, the concentration of carbon dioxide is lowered in the second pipe 41.

In operation S120, the air required for combustion of the combustion chamber 20 from the first supply valve 35 and the outside may be introduced through the first air supply pipe 39 so that the VOC gas flows into the first heat storage unit 30. The first air supply valve 36 is opened, the first discharge valve 37 is closed, the second supply valve 35 'and the second air supply valve 36' of the second heat storage unit 30 'are closed. The second discharge valve 37 'is opened, and after 1 minute to 3 minutes, the second supply valve 35' and the second air supply valve 36 'of the second heat storage unit 30' are opened. The second discharge valve 37 'is closed, the first supply valve 35 and the first air supply valve 36 of the first heat storage unit 30 are closed, and the first discharge valve 37 is opened to open the second heat storage unit. VOC gas also flows to 30 '.

In operation S130, the VOC gas introduced into the first heat storage unit 30 is preheated by the first heat storage material 31 and the first heat storage material 32. 30) and the first and second heat storage units 30 and 30 'are preheated by the combustion gas discharged from the combustion chamber 20 when the VOC gas is circulated between the second heat storage unit 30'. The temperature inside the first and second heat accumulators 30 and 30 'is maintained at 300 ° C to 400 ° C.

In step S140, the VOC gas preheated by the first first and second heat storage materials 31 and 32 is oxidized by the first catalyst material 34. The VOC gas, which is preheated by 32 and enters the first catalyst material 34, is oxidized by reaction with the first catalyst material 34, so that combustion is possible at a low temperature in the combustion chamber 20, and the first catalyst material ( The temperature of 34) should be maintained at 300 ℃ ~ 400 ℃ to cause oxidation catalyst.

The first and second three heat storage materials 33 and 33 ′ serve to maintain a constant temperature of the first and second catalyst materials.

In step S150, the VOC gas flows into the combustion chamber and is combusted. The temperature of the combustion chamber 20 is maintained at 400 ° C. to 500 ° C. as described above, and the air required for combustion is one air supply pipe 39. Since the temperature of the combustion chamber 20 is maintained by the heat generated while the VOC gas is burned, the initial temperature is maintained by the burner 21 and then the burner 21 is stopped after 20 to 30 minutes of operation. It is possible to maintain the temperature of the combustion chamber 20 without fuel.

In operation S160, the combustion gas is introduced into the second heat storage unit 30 ′ after the combustion of the VOC gas, and the high temperature combustion gas is introduced into the second heat storage unit 30 ′, and combustion is performed in units of 1 to 3 minutes. The flow of gas is reversed.

In operation S170, the second heat storage unit 30 ′ is preheated by the introduced combustion gas, and the combustion gas introduced into the second heat storage unit 30 ′ is transferred to the second heat storage unit 30 ′. The discharge pipe 40 'is discharged to the discharge pipe 40' through the open discharge valve 37 ', and the high temperature combustion gas is the second catalyst 34' and the second 1,2,3 heat storages of the second heat storage unit 30 '. By preheating the ashes 31 ′, 32 ′, 33 ′ and raising the temperature, the temperature of the second heat storage unit 30 ′ is increased at the time of circulation of the first heat storage unit 30 and the second heat storage unit 30 ′. 300 to 400 degreeC can be maintained.

In operation S180, the combustion gas is discharged to the second discharge valve 37 ′ that is open to the second heat storage unit 30 ′. As shown in the valve opening and closing step S120, the second heat storage unit 30 ′ is performed. All the valves 35 'and 36' are closed except for the two discharge valves 37 '.

In operation S190, a part of the combustion gas discharged through the second discharge valve 37 ′ is discharged to the outside through the exhaust fan 43, and is discharged through the second discharge valve 37 ′. Part of the combustion gas is discharged to the outside through the exhaust fan 43 formed in the exhaust pipe (45).

Step (S200) is a step in which a part of the combustion gas that is not exhausted through the exhaust pipe 45 is moved to the first pipe 42 through the intake valve 22, when the combustion gas is discharged through the exhaust pipe 45 Some combustion gas which is not exhausted is moved to the first pipe 42 through the intake valve 22 which is open.

Step S210 is a step of circulating through the circulation fan 44 formed in the first pipe 42, and the hot activated gas 10 is activated through the circulation fan 44 formed in the first pipe 42. Is moved to the step of separating and circulating the VOC gas adsorbed on the activated carbon 10, the temperature meter 46 is installed to maintain the temperature of the combustion gas moved to the activated carbon 10 at 160 ℃ ~ 170 ℃ When the proper temperature is not maintained, the hot gas intake pipe 23 in which the hot gas intake valve 22 formed in the combustion chamber 20 is installed is connected to the first pipe 42 so that the hot gas intake valve 22 according to the temperature is provided. Open and close to maintain the temperature.

In addition, the control method of all the valves 22, 35, 35 ', 36, 36', 37, 37 'is controlled by all the valves 22, 35, 35', 36, 36 ', 37, 37'. The sensor is attached and automatically controlled by the control system. The circulation type of the first heat accumulator 30 and the second heat accumulator 30 'is alternated in units of 1 to 3 minutes. The burner 21 is stopped after maintaining the elevated temperature for 20 to 30 minutes, and the combustion action of the combustion chamber 20 is replaced with the combustion gas generated while the VOC gas is burned, and the first and second heat storage units 30 30 ') Also, the fuel consumption is low because it is preheated by the combustion gas, and the operation time of the VOC removal device is operated 5 to 6 days a week, and the activated carbon regeneration device does not operate the VOC removal device. It will run for one to two days a week.

As described above, the activated carbon regeneration device removes the VOC gas adsorbed on the activated carbon, and if the activated carbon is regenerated without separating the activated carbon from the VOC removal device, the combustion gas having a low oxygen concentration is used as the VOC desorption gas of the activated carbon. There is little risk of explosion by VOC or activated carbon in the air, and the heat accumulating part and the catalyst part are formed inside so that the VOC gas can be burned at a low temperature, and the combustion gas generated during the combustion of the VOC gas is used as a heat source. It is possible to operate with only a small amount of fuel used in the initial heating process.

Claims (9)

In the activated carbon regeneration device to remove the VOC gas, A combustion chamber 20 in which VOC gas is combusted; 1 and 2 supply pipes (38,38 ') having 1, 2 supply valves (35, 35') formed to supply the VOC gas, and 1 to supply air required for the combustion of VOC gas in the combustion chamber (20). 1,2 air supply pipes 39 and 39 'having two air supply valves 36 and 36' formed therein, and 1,2 discharge valves 37 and 37 'for discharging the combustion gas combusted in the combustion chamber 20. And first and second heat storage units including first and second discharge pipes 40 and 40 'having preformed preheating and supplying the VOC gas supplied through the first and second supply pipes 38 and 38' to the combustion chamber 20. 30,30 '); An exhaust pipe 45 for discharging a part of the combustion gas discharged through the first and second discharge valves 37 and 37 'to the outside; A first pipe 42 connected to the exhaust pipe 45 and provided with a circulating fan 44 to circulate some combustion gas not discharged through the exhaust pipe 45 toward the activated carbon 10; A second pipe 41 installed so that the combustion gas moved by the circulation fan 44 separates the VOC gas adsorbed on the activated carbon 10 and moves to the combustion chamber 20; Activated carbon regeneration apparatus comprising a. The method of claim 1, The combustion chamber 20 is activated carbon regeneration apparatus, characterized in that the burner 21 is installed to set the initial temperature. The method of claim 2, Activated carbon regeneration apparatus, characterized in that for setting the initial temperature of the combustion chamber 20 by the burner 21 to 300 ℃ ~ 400 ℃. The method of claim 1, Activated carbon regeneration, characterized in that the first and second heat accumulator (30, 30 ') is formed in the first and second catalysts (34, 34') so that the VOC gas can be burned at a low temperature in the combustion chamber 20 Device. The method according to claim 1 or 4, The first and second heat storage parts 30 and 30 'are preheated first and second heat storage materials 31 and 31', first and second heat storage materials 32 and 32 ', and first and second catalyst materials ( 34, 34 '), the first and second three heat storage materials (33, 33') are arranged, respectively. The method of claim 1, Activated carbon regeneration apparatus, characterized in that the hot gas suction pipe 23 is formed between the combustion chamber 20 and the first pipe 42 is formed with a hot gas suction valve 22 for sucking the high pressure gas generated after combustion. The method of claim 1, When the first supply valve 35 of the first heat storage unit 30 is opened, VOC gas is introduced into the first heat storage unit 30 through the first supply pipe 38 having the first supply valve 35, and thus, the first heat storage unit ( 30 is introduced into the combustion chamber 20 after preheating and oxidation by the first 1,2,3 heat storage materials 31,32,33 and the first catalyst material 34 in the combustion chamber 20, and burns in the combustion chamber 20. The combustion gas flows into the second heat storage unit 30 ', heats the second 1,2,3 heat storage materials 31', 32 ', 33', and the second catalyst 34 ', and then discharges the two discharge valves. (37 ') is discharged through the second discharge pipe (40') and after a predetermined time, the first supply valve 35 is closed and the second supply valve 35 'is opened, so that the VOC gas is stored in the second heat storage unit (30'). ), And the introduced VOC gas is preheated by the second 1,2,3 heat storage materials 31 ', 32', 33 'and the second catalyst 34' in the second heat storage portion 30 '. After the superoxidation is completed, the combustion gas 20 flows into the combustion chamber 20, and the combustion gas combusted in the combustion chamber 20 flows into the first heat storage unit 30 and the first, second, and third heat storage materials of the first heat storage unit 30. 1 tip with (31,32,33) Activated carbon regeneration apparatus, characterized in that the circulation process is discharged through the first discharge pipe 40 is installed after the heating medium 34 is installed one discharge valve (37). The method of claim 7, wherein Activated carbon regeneration device, characterized in that the interval of the supply of the VOC gas is replaced from the first heat storage unit 30 to the second heat storage unit (30 ') 1 minute to 3 minutes. The method of claim 7, wherein The first and second three heat storage material (33, 33 ') is activated carbon regeneration device, characterized in that to maintain the oxidation temperature of the first and second catalysts.

Images