KR20130013595A - Treating apparatus for waste gas in sinter machine and treating method thereof - Google Patents

Abstract

PURPOSE: Treatment apparatus of exhaust gas for sintering machine and a treating method thereof are provided to increase the adsorption efficiency of activated carbon by reducing condensate generated inside adsorption unit as moisture is removed from the exhaust gas prior to SOx(Sulfur Oxides) and NOx(Nitrogen Oxide). CONSTITUTION: Treatment apparatus of exhaust gas for sintering machine(10) comprises a first adsorption unit(30), a main fan(40), a second adsorption unit(50), and a heat exchanging unit(120). The first adsorption unit removes SOx among the exhaust gas discharged from a sintering machine. The main fan forcibly delivers the exhaust gas passed the first adsorption unit and heats the exhaust gas above the acid dew point. The second adsorption unit removes NOx included in the exhaust gas forcibly delivered by the main fan. The heat exchanger removes the moisture included in the exhaust gas supplied to the first adsorption unit or the second adsorption unit.

Description

Emission gas treatment device for sintering machine and its treatment method {TREATING APPARATUS FOR WASTE GAS IN SINTER MACHINE AND TREATING METHOD THEREOF}

The present invention relates to a waste gas treatment apparatus for a sintering machine and a treatment method thereof, and more particularly, to a waste gas treatment apparatus for a sintering apparatus and a treatment method capable of effectively removing SOX and NOX components by removing moisture contained in the waste gas. will be.

Typical steelmaking consists of a steelmaking process to produce molten iron, a steelmaking process to remove impurities from molten iron, a casting process to solidify the liquid iron, and a rolling process to make iron into steel or wire.

The casting process is a process in which liquid molten steel is injected into a mold and then cooled and solidified while passing through a continuous casting machine to continuously produce an intermediate material such as a slab or a bloom.

In this process, the bloom is converted into a billet (Billet) again through a rolling mill, and processed into a wire rod through a wire mill.

Further, the slab is produced as a heavy plate through a plate rolling mill or as a hot rolled coil or a hot rolled steel plate while passing through a hot rolling mill.

The steelmaking process for producing molten iron may be performed by a blast furnace for producing molten iron from iron ore, and charged with coke and sintered raw material dried in the coke oven into the sintering process to produce a sintered ore charged in the blast furnace.

Exhaust gas generated from the sintering machine is discharged by removing the SOX component and NOX component while passing through the exhaust gas treatment apparatus for the sintering machine, and activated carbon for removing the SOX component and NOX component is recycled and recycled through the regeneration tower.

Background art of the present invention is disclosed in Republic of Korea Patent Publication No. 10-2004-0092822 (published on November 4, 2004, the name of the invention: sintering machine exhaust gas circulation operation method).

It is an object of the present invention to provide an exhaust gas treatment apparatus for a sintering machine and a method of treating the same, which can effectively remove SOX and NOX components by removing moisture contained in the exhaust gas.

In order to achieve the above object, the present invention, the first adsorption unit for removing the SOx in the exhaust gas discharged from the sintering machine; A main fan for pumping the exhaust gas passing through the first adsorption unit to be heated above the acid dew point; A second adsorption part for removing NOX contained in the exhaust gas pressurized by the main fan; And a heat exchanger for removing moisture contained in the exhaust gas supplied to the first adsorption part or the second adsorption part.

In addition, the heat exchange unit, the tub collecting condensate; A drum rotatably installed in the tub and having a drainage hole formed therein; A drive unit installed at the tub to rotate the drum; A first supply pipe supplying exhaust gas of the sintering machine to the drum; A second supply pipe for supplying low temperature dry air into the tub; An exhaust pipe for supplying exhaust gas discharged from the drum to the first adsorption unit or the second adsorption unit; And a drain pipe for discharging the condensed water generated inside the tub to the outside.

In addition, the drain pipe is characterized in that the condensed water is provided with a U-trap tube.

In addition, the present invention, (a) removing the dust contained in the exhaust gas of the sintering machine; (b) removing moisture contained in the dust-removed exhaust gas; (c) using the activated carbon as a catalyst to remove SOX contained in the exhaust gas; (d) heating the exhaust gas to at least an acid dew point; And (e) removing NOx contained in the heated exhaust gas using activated carbon as a catalyst.

In addition, the step (b) is characterized in that by rotating the exhaust gas of the sintering machine to generate a whirlwind, by spraying low-temperature dry air to the exhaust gas.

Exhaust gas treatment apparatus for sintering apparatus and its treatment method according to the present invention is to remove the moisture from the exhaust gas before removing the SOx and NOX can reduce the condensate generated inside the adsorption unit to increase the adsorption efficiency of activated carbon and clogging the adsorption unit There is an advantage that can be prevented and to prevent corrosion by condensate.

1 is a block diagram showing an exhaust gas treatment apparatus for a sintering apparatus according to an embodiment of the present invention.
2 is a cross-sectional view showing a first adsorption unit of the exhaust gas treatment apparatus for a sintering apparatus according to an embodiment of the present invention.
3 is a cross-sectional view showing a second adsorption portion of the exhaust gas treatment apparatus for a sintering apparatus according to an embodiment of the present invention.
4 is a cross-sectional view showing a regeneration tower of the exhaust gas treatment apparatus for a sintering apparatus according to an embodiment of the present invention.
5 is a cross-sectional view showing a heat exchange unit of the exhaust gas treatment apparatus for a sintering apparatus according to an embodiment of the present invention.
6 is a block diagram showing an exhaust gas treatment apparatus for a sintering apparatus according to an embodiment of the present invention.
7 is a flowchart illustrating a method for treating exhaust gas for a sintering machine according to an embodiment of the present invention.
8 is a flow chart illustrating an adsorption method of the exhaust gas treatment method for a sintering machine according to an embodiment of the present invention.
9 is a flowchart illustrating a method of regenerating activated carbon in a method for treating exhaust gas for a sintering machine according to an embodiment of the present invention.

Hereinafter, with reference to the accompanying drawings will be described an embodiment of the exhaust gas treatment apparatus for a sintering machine and a control method thereof.

In this process, the thicknesses of the lines and the sizes of the components shown in the drawings may be exaggerated for clarity and convenience of explanation.

In addition, the terms described below are terms defined in consideration of the functions of the present invention, which may vary depending on the intention or custom of the user, the operator.

Therefore, definitions of these terms should be made based on the contents throughout this specification.

1 is a configuration diagram showing an exhaust gas treatment apparatus for a sintering apparatus according to an embodiment of the present invention, Figure 2 is a cross-sectional view showing a first adsorption portion of the exhaust gas treatment apparatus for a sintering apparatus according to an embodiment of the present invention. 3 is a cross-sectional view illustrating a second adsorption unit of an exhaust gas treating apparatus for a sintering apparatus according to an embodiment of the present invention.

In addition, Figure 4 is a cross-sectional view showing a regeneration tower of the exhaust gas treatment apparatus for a sintering apparatus according to an embodiment of the present invention, Figure 5 is a heat exchange unit of the exhaust gas treatment apparatus for a sintering apparatus according to an embodiment of the present invention 6 is a block diagram illustrating an apparatus for treating exhaust gas for a sintering machine in accordance with an embodiment of the present invention.

1 to 6, the exhaust gas treatment apparatus for a sintering apparatus according to an embodiment of the present invention, the filter unit 20 and the activated carbon to remove dust contained in the exhaust gas discharged from the sintering machine 10 Heat exchanger for removing moisture contained in the adsorption parts (30, 40, 50) and the exhaust gas supplied to the adsorption parts (30, 50) to remove the SOx and NOX in the exhaust gas filled and passed through the filter unit 20 The regeneration tower 60 which heats the unit 120, the activated carbon discharged from the adsorption units 30 and 50, and performs the regeneration process, and stores the activated carbon supplied from the adsorption units 30 and 50, and regenerates the regeneration tower 60. Supply unit 100 for continuously supplying activated carbon to the discharge, the discharge unit 110 for adjusting the amount of activated carbon discharged from the regeneration tower 60, and the storage to collect the regeneration tower exhaust gas discharged from the regeneration tower 60 Washing water is injected into the regeneration tower discharge gas supplied from the tank 90 and the storage tank 90 to discharge the regeneration tower discharge gas. Downcomer (80) to neutralize.

The exhaust gas of the sintering machine 10 removes dust while passing through the filter unit 20, removes moisture while passing through the heat exchange unit 120, and passes through the adsorption units 30, 40, and 50, while SOX and NOX After is removed is discharged through the chimney (70).

At this time, the adsorption unit (30, 50) is filled with activated carbon for capturing SOX and NOX, the activated carbon passing through the adsorption unit (30, 50) and adsorbed SOX and NOX is discharged is heated in the regeneration tower (60) After regeneration, it is supplied to the adsorption parts 30 and 50 again.

Exhaust gas discharged from the regeneration tower 60 passes through the storage tank 90 and the downcomer 80 to remove foreign substances.

The heat exchange part 120 includes a tub 121 in which condensed water is collected, a drum 122 rotatably installed inside the tub 121, and a drain hole 122a is formed, and a tub 121 installed in the tub 121. The driving unit 123 for rotating the 122, the first supply pipe 124 for supplying the exhaust gas of the sintering machine in the drum 122, and the second supply pipe for supplying low temperature dry air into the tub 121 ( 125, an exhaust pipe 127 for supplying the discharge gas discharged from the drum 122 to the adsorption parts 30 and 50, and a drain pipe 126 for discharging condensate generated in the tub 121 to the outside. do.

Exhaust gas passing through the filter unit 20 is supplied into the drum 122 along the first supply pipe 124 and moved outside the drum 122 along the drain hole 122a formed in the drum 122. After being discharged to the outside of the tub 121 along the exhaust pipe 127 is supplied to the adsorption unit (30, 50).

At this time, the drum 122 is rotated by the operation of the driving unit 123 to form a whirlwind of the discharge gas supplied into the drum 122, the low-temperature dry air supplied along the second supply pipe 125 is a tub ( 121) the moisture contained in the exhaust gas is collected into the condensed water formed on the inner wall of the drum 122 or the outer wall of the drum 122.

The condensed water formed in the drum 122 flows along the drum 122 and accumulates on the bottom surface of the tub 121, and then drains out of the tub 121 along the drain pipe 126.

Therefore, since the exhaust gas supplied through the heat exchange part 120 and supplied to the adsorption parts 30 and 50 is almost dehydrated, the amount of condensed water generated in the adsorption parts 30 and 50 can be reduced. Adsorption efficiency of the activated carbon is increased and it is possible to prevent clogging of the adsorption units 30 and 50.

In addition, since the drain pipe 126 is provided with a condensed water trap tube 126a, the exhaust gas and air supplied through the first supply pipe 124 and the second supply pipe 125 are discharged along the drain pipe 126. It can be prevented.

The adsorption parts 30, 40, and 50 respectively discharge and discharge the first adsorption part 30 to remove SOX from the exhaust gas that has passed through the filter part 20, and the exhaust gas that has passed through the first adsorption part 30. The main fan 40 which heats gas more than a dew point, and the 2nd adsorption part 50 which removes NOX contained in the exhaust gas conveyed by the main fan 40 are included.

The second adsorption unit 50 is provided with a reaction unit 58 for injecting a catalyst to the exhaust gas passing through the second adsorption unit 50.

The exhaust gas discharged from the sintering machine 10 removes dust while passing through the filter unit 20, removes moisture while passing through the heat exchange unit 120, and removes SOX while passing through the first adsorption unit 30. do.

The first suction part 30 includes a first main body 32 including a first intake port 32a, a first exhaust port 32b, and a first guide part 32c through which the exhaust gas of the sinterer 10 passes. And a first injection portion 34 for adjusting the amount of activated carbon supplied to the first body 32 and a first discharge portion 36 for adjusting the amount of activated carbon discharged from the first body 32. do.

The first injection part 34 is installed on the upper surface of the first body 32, and the first discharge part 36 is installed on the bottom of the first body 32, so the activated carbon supplied into the first body 32 is supplied. The silver is supplied to the first body 32 while maintaining a constant input amount by the first input part 34, and a certain amount of activated carbon is discharged to the outside of the first body 32 by the first discharge part 36.

Thus, since the activated carbon passing through the first body 32 maintains a constant amount and passes through the first body 32, the empty space where the activated carbon is not filled in the first body 32 is reduced.

Since the first guide part 32c is a funnel-shaped member, the plurality of first guide parts 32c are continuously installed so that the activated carbon falling on the upper side of the first guide part 32c falls down evenly along the plurality of first guide parts 32c in the downward direction. do.

The exhaust gas rising upward from the lower side of the first body 32 is moved upward through the gap between the first guide portions 32c.

Therefore, since the amount of contact between the exhaust gas and the activated carbon discharged to the outside of the first body 32 through the first exhaust port 32b after being introduced into the first body 32 through the first intake 32a increases, the SOx increases. Can be effectively removed.

The second suction part 50 includes a second main body provided with a second suction port 52a, a second exhaust port 52b, and a second guide part 52c through which the exhaust gas supplied by the main fan 40 passes. (52), a second injection portion (54) for adjusting the amount of activated carbon supplied to the second body (52), and a second discharge portion (56) for adjusting the amount of activated carbon discharged from the second body (52). And a reaction unit 58 for injecting a catalyst to the exhaust gas passing through the second body 52.

The second injection portion 54 is installed on the upper surface of the second body 52, and the second discharge portion 56 is installed on the bottom surface of the second body 52, so the activated carbon supplied into the second body 52 is supplied. The silver is supplied to the second body 52 while maintaining a constant input amount by the second input part 54, and a certain amount of activated carbon is discharged to the outside of the second body 52 by the second discharge part 56.

In this way, since the activated carbon passing through the second body 52 maintains a constant amount and passes through the second body 52, the empty space where the activated carbon is not filled in the second body 52 is reduced.

The second guide portion 52c has the same shape and installation structure as the first guide portion 32c.

Therefore, since the contact amount between the exhaust gas and the activated carbon discharged to the outside of the second body 52 through the second exhaust port 52b after rising and flowing into the second body 52 through the second intake port 52a increases, NOX Can be effectively removed.

In addition, since the catalyst is injected into the exhaust gas passing through the second adsorption unit 50, NOX and the catalyst react to remove the salt, thereby effectively removing NOX from the second adsorption unit 50.

The reaction unit 58 includes a blocking panel 58a for dividing the second body 52, a bypass passage 58b for connecting the spaces partitioned by the blocking panel 58a, and a bypass passage 58b. The injection unit 58c for injecting a catalyst to the exhaust gas passing through the).

Exhaust gas passing through the bypass passage (58b) passes through a narrow passage compared to the second body 52, it is possible to effectively react the catalyst and the exhaust gas injected by the injection unit (58c).

In addition, the bypass passage (58b) is formed on one side of the second body 52, the 'c' shape so as to connect the upper and lower portions of the second body 52 partitioned by the blocking panel (58a). Is bent.

Therefore, the salt generated by the reaction of the exhaust gas and the catalyst is not in contact with the activated carbon, and can be easily removed from the bypass passage portion 58b.

Here, the catalyst is made of ammonia, the reaction equation of the chemical reaction in which the off-gas for the sintering machine and ammonia is precipitated as a salt is as described below.

<Reaction Scheme>

6NO ₂ + 8NH ₃ → 7N ₂ + 12H ₂ O

6NO ₂ + 4NH ₃ → 5N ₂ + 6H ₂ O

Here, the heat exchange unit 120 may be further installed between the main fan 40 and the second adsorption unit 50, which can be easily changed and implemented by those skilled in the art to recognize the technical configuration of the present invention Specific drawings or description of the embodiment will be omitted.

The inlets 34 and 54 are formed of adsorption reservoirs 34a and 54a provided at the inlets of the first adsorption unit 30 and the second adsorption unit 50 and activated carbon supplied to the adsorption reservoirs 34a and 54a. Adsorption valves 34c and 54c for determining whether to supply and supply amount, and adsorption level sensors 34b and 54b for detecting the stack height of activated carbon contained in the adsorption reservoirs 34a and 54a.

Here, when the stack height of the activated carbon received from the adsorption level sensors 34b and 54b is less than or equal to the set value, the control unit 108 transmits an open signal to the adsorption valves 34c and 54c.

The discharge parts 36 and 56 are provided at the discharge ports of the first adsorption part 30 or the second adsorption part 50 to open / close valves 38 and 58 to determine whether the activated carbon is discharged, and the first adsorption part ( 30) and rotary valves 36a and 56a installed at the discharge ports of the second adsorption unit 50 to maintain the discharge of activated carbon constantly.

Activated carbon is discharged through the discharge holes of the first adsorption part 30 and the second adsorption part 50 when the open / close valves 38 and 58 are opened, and activated carbon discharged along the discharge port when the open / close valves 38 and 58 are closed. Emissions are blocked.

Activated carbon is discharged by the operation of the on / off valves 38 and 58, and the discharge of activated carbon discharged through the discharge port by the rotary valves 36a and 56a is kept constant.

When the discharge of activated carbon is stopped, the on / off valves 38 and 58 are driven to stop the discharge of activated carbon discharged through the discharge port.

The opening / closing valves 38 and 58 are connected to the accommodating parts 38a and 58a, which are movably installed at intervals from the discharge port, and are connected to the accommodating parts 38a and 58a and vary the positions of the accommodating parts 38a and 58a. Storage cylinders 38b and 58b.

When the rod protrudes from the storage cylinders 38a and 58a, the accommodating portions 38a and 58a, which are formed in a concave bowl shape, are disposed to face the discharge holes, so that the activated carbon discharged along the discharge holes is blocked by the storage parts 38a and 58a. The discharge of activated carbon is stopped.

In addition, the discharge parts 36 and 56 of the present embodiment are installed at the discharge ports of the first adsorption part 30 and the second adsorption part 50, and when a malfunction is detected, the first adsorption part ( 30) and between the knife valves 37 and 57 to close the discharge port of the second adsorption part 50, the on-off valves 38 and 58 and the rotary valves 36a and 56a, and discharge of activated carbon Sliding gates 39 and 59 further determine the.

Therefore, when the discharge parts 36 and 56 are malfunctioned and the activated carbon is discharged more than necessary, the operator can close the knife valves 37 and 57 or the sliding gates 39 and 59 to stop the discharge of the activated carbon.

If clogging occurs in the on / off valves 38 and 58, the knife valves 37 and 57 can be closed to repair the on / off valves 38 and 58, and clogging occurs in the rotary valves 36a and 56a. In this case, the sliding gates 39 and 59 are closed to repair the rotary valves 36a and 56a.

If the stack height of the activated carbon contained in the adsorption reservoirs 34a and 54a is less than or equal to the set value, the activated carbon is supplied to the adsorption reservoirs 34a and 54a since the adsorption valves 34c and 54c are opened in response to a signal from the control unit 108.

The adsorption reservoirs 34a and 54a are installed on the upper surfaces of the first main body 32 and the second main body 52 to store the activated carbon supplied into the first main body 32 and the second main body 52. When the stacking height of the activated carbon accommodated in the 34a and 54a is kept constant, the supply amount of the activated carbon supplied to the first body 32 and the second body 52 is kept constant.

In addition, when the stack height of the activated carbon stored in the adsorption storage (34a, 54a) is lowered to the minimum value, the opening and closing valves (38, 58) are operated in accordance with the signal transmitted from the control unit 108, the first body 32 and the second It is possible to reduce the amount of activated carbon discharged from the body 52.

Therefore, since a predetermined amount or more of activated carbon is filled in the first body 32 and the second body 52, the contact between the exhaust gas and the activated carbon passing through the first body 32 and the second body 52 is activated. It is possible to prevent the amount from being reduced.

As described above, since the activated carbon is filled in the first adsorption unit 30, the SOx contained in the exhaust gas is adsorbed, and the exhaust gas passing through the first adsorption unit 30 maintains a temperature below the acid dew point. It is easily adsorbed on activated carbon.

The exhaust gas passing through the first adsorption part 30 is pressurized by the main fan 40 to the second adsorption part 50, and the pressure of the exhaust gas is increased because the inside of the transfer pipe is pressurized by the main fan 40. The temperature rises above the dew point.

Ammonia is injected into the exhaust gas whose temperature is raised above the acid dew point and passes through the second adsorption unit 50 filled with activated carbon, so that NOx is adsorbed to the activated carbon.

Exhaust gas passing through the second adsorption unit 50 is discharged to the atmosphere through the chimney 70 in a state in which SOX and NOX are removed.

Activated carbon discharged from the first adsorption unit 30 and the second adsorption unit 50 is collected and stored in the supply unit 100, and activated carbon is continuously supplied to the regeneration tower 60 by the operation of the supply unit 100.

The activated carbon supplied to the regeneration tower 60 is exposed to the hot air that is injected into the regeneration tower 60, so that NOx adsorbed on the activated carbon is burned.

Supply unit 100 is the storage 102 is installed in the inlet of the regeneration tower 60, and whether the supply of activated carbon discharged from the first adsorption portion 30 and the second adsorption portion 50 is supplied to the storage 102 And a first valve 104 for determining the supply amount, and a level sensor 106 for sensing the stacked height of the activated carbon accommodated in the reservoir (102).

Here, when the stacked height of the activated carbon received from the level sensor 106 is less than or equal to the set value, the control unit 108 transmits an opening signal to the first valve 104.

Activated carbon discharged from the first adsorption unit 30 and the second adsorption unit 50 is supplied to the storage 102, and activated carbon temporarily stored in the storage 102 is introduced into the regeneration tower 60.

The stacked height of the activated carbon stacked in the reservoir 102 is detected by the level sensor 106. When the stacked height of the activated carbon is lower than the set value, the level sensor 106 transmits an electrical signal to the controller 108 and the controller ( An open signal from 108 is transmitted to the first valve 104 to supply activated carbon to the reservoir 102.

Therefore, since the storage 102 always stores an amount of activated carbon in excess of a set value, it is possible to continuously supply a uniform amount of activated carbon into the regeneration tower 60.

In addition, since the discharge unit 110 includes a second valve 112 installed at the discharge port of the regeneration tower 60, the control unit 108 is transmitted when the stack height of the activated carbon stored in the storage 102 drops to the minimum value. Since the opening degree of the second valve 112 is reduced according to the signal, it is possible to reduce the amount of activated carbon discharged from the regeneration tower 60.

As described above, a certain amount of activated carbon is maintained in the regeneration tower 60, and when the regeneration tower 60 passes through the regeneration tower 60, the temperature and pressure of the regeneration tower 60 are maintained uniformly, thereby improving regeneration efficiency of the activated carbon. The effect will be improved.

In addition, since the activated carbon passing through the heating unit 64 in which high temperature hot air is injected inside the regeneration tower 60 passes through the heating section for a predetermined time, NOx is effectively burned and the regeneration efficiency is improved more effectively.

In the regeneration tower 60, a regeneration tower exhaust gas in which the SOx component is concentrated is generated, and the regeneration tower exhaust gas is moved to the downcomer 80 after being filled in the storage tank 90 to be neutralized.

The downcomer 80 includes a reaction tank 82 in which a regeneration tower exhaust gas and washing water are mixed, a first injection pipe 84 connected to the reaction tank 82 and supplying the washing water to the reaction tank 82, and The second injection pipe 86 is connected to the reaction tank 82 to be positioned below the first injection pipe 84 and supplies the regeneration tower exhaust gas to the reaction tank 82.

The regeneration tower exhaust gas discharged from the regeneration tower 60 is supplied into the reaction tank 82 along the storage tank 90 and the second injection pipe 86, and the washing water reacts along the first injection pipe 84. It is supplied into the tank 82.

Since the first injection pipe 84 is disposed above the second injection pipe 86, the washing water is injected into the regeneration tower exhaust gas injected into the reaction tank 82.

In the reaction tank 82, since the salt is generated by the reaction of the regeneration tower exhaust gas and the washing water, the SOx is neutralized.

The downcomer 80 of the present embodiment has been described with respect to the separate downcomer 80 installed in the sintering plant, and the coke oven exhaust gas treatment in the Hwaseong plant without installing a separate downcomer 80 in the sintering plant The second injection pipe 86 may be connected to the downcomer 80 to process the regeneration tower exhaust gas.

When the second injection pipe 86 is connected to the downcomer 80 of the Hwaseong plant, the second injection pipe 86 is installed below the first injection pipe 84 and the injection pipe for supplying the acid gas.

This can be easily changed and implemented by those skilled in the art having recognized the technical configuration of the present invention will not be described in detail drawings or description of other embodiments.

Reference numeral 68 is a nitrogen supply unit 68 for supplying nitrogen into the regeneration tower (60).

Looking at the exhaust gas treatment method for a sintering apparatus according to an embodiment of the present invention configured as described above are as follows.

7 is a flowchart illustrating a method for treating exhaust gas for a sintering machine according to an embodiment of the present invention, and FIG. 8 is a flowchart illustrating an adsorption method for a method for treating exhaust gas for a sintering machine according to an embodiment of the present invention. 9 is a flowchart illustrating a method of regenerating activated carbon in a method for treating exhaust gas for a sintering machine according to an embodiment of the present invention.

1 to 9, the exhaust gas treatment method for a sintering apparatus according to an embodiment of the present invention to remove the dust contained in the exhaust gas of the sintering machine 10 (S10) and the dust is removed Removing the water contained in the gas (S12), removing the SOX contained in the exhaust gas using activated carbon as a catalyst (S20), heating the exhaust gas above the acid dew point (S30), Using the activated carbon as a catalyst to remove the NOX contained in the heated exhaust gas (S40), the step of spraying a catalyst to the exhaust gas in which the step of removing the NOX (S40) (S50) and regeneration of the activated carbon Regenerating by heating in the tower (60) (S60), Filling the regeneration tower discharged gas discharged from the regeneration tower 60 in the storage tank 90 (S70), and is supplied from the storage tank 90 Neutralizing the regeneration tower discharge gas by spraying the washing water on the regeneration tower discharge gas (S) 80).

The exhaust gas discharged from the sintering machine 10 removes dust while passing through the filter unit 20, removes moisture contained in the exhaust gas while passing through the heat exchange unit 120, and removes the first adsorption unit 30. SOX is removed while passing, and heated to the acid dew point while passing through the main fan 40, NOX is removed while passing through the second adsorption unit 50 is discharged to the atmosphere through the chimney (70).

The exhaust gas passing through the filter unit 20 flows into the drum 122 through the first supply pipe 124, moves out of the drum 122 through the drain hole 122a, and then moves along the exhaust pipe 127. The first adsorption part 30 is moved to the side.

At this time, since the drum 122 is rotated by the operation of the driving unit 123, the exhaust gas moved from the inside of the drum 122 to the outside forms a tornado, and low-temperature dry air supplied through the second supply pipe 125 is discharged. Condensed water is formed on the inner wall or the outer wall of the drum 122 by condensing moisture contained in the exhaust gas while being in contact with the gas.

The condensed water formed in the drum 122 is collected on the bottom surface of the tub 121 and discharged to the outside of the tub 121 along the drain pipe 126, and the first supply pipe 124 and the condensed water accumulated in the utrap pipe 126a. Air and exhaust gas introduced into the tub 121 along the second supply pipe 125 are discharged along the exhaust pipe 127 without being discharged through the drain pipe 126 and are supplied to the first adsorption part 30.

The exhaust gas passing through the first adsorption unit 30 and the second adsorption unit 50 is adsorbed by SOX and NOX by activated carbon, and the exhaust gas passing through the first adsorption unit 30 maintains a temperature below the acid dew point. As it is in a liquid state, it is easily adsorbed by activated carbon.

Since the exhaust gas passing through the second adsorption unit 50 is heated and passed above the acid dew point, it is easily adsorbed to the activated carbon by the characteristics of NOx.

In the step S30 of heating the exhaust gas by the main fan 40, the exhaust gas is pumped to the main fan 40 so that the pressure inside the transport pipe is increased so that the temperature of the exhaust gas is raised above the acid dew point.

The exhaust gas passing through the first adsorption part 30 and the second adsorption part 50 has removed moisture while passing through the heat exchange part 120, so that the interior of the first adsorption part 30 and the second adsorption part 50 is reduced. It is possible to prevent the formation of condensate.

Therefore, the adsorption efficiency of the activated carbon can be improved and the corrosion by the condensate can be prevented, so that the lifespan of the first adsorption part 30 and the second adsorption part 50 is extended.

Removing the SOx (S20) and removing the NOX (S40) is a step of determining whether the stacked height of activated carbon of the adsorption storage (34a, 54a) installed in the inlet of the adsorption unit (30, 50) is less than the set value (S22) If the stack height of the activated carbon is less than or equal to the set value, the adsorption valves 34c and 54c which determine whether to supply the activated carbon to the adsorption reservoirs 34a and 54a are opened to supply the activated carbon to the adsorption reservoirs 34a and 54a. Step S24 is included.

Since the adsorption reservoirs 34a and 54a maintain a state in which activated carbons having a predetermined height or more are stacked, the amount of activated carbon supplied into the first body 32 and the second body 52 from the adsorption reservoirs 34a and 54a is constant. Is maintained.

Therefore, the temperature and pressure inside the first body 32 and the second body 52 are kept constant, and the amount of contact between the exhaust gas and the activated carbon passing through the first body 32 and the second body 52 is reduced. This can be prevented, effectively capturing SOX and NOX.

In the step S22 of determining the stack height of the activated carbon when the stack height of the activated carbon exceeds a set value, the step S26 of closing the adsorption valves 34c and 54c is performed, and opening or closing the adsorption valves 34c and 54c. After the process proceeds to the step of determining the stacked height of the activated carbon (S22).

Therefore, by continuously detecting the stacking height of the activated carbon contained in the adsorption storage (34a, 54a) it is possible to adjust the supply amount of the activated carbon supplied to the first body 32 and the second body (52).

Activated carbon is discharged from the first body 32 and the second body 52 when the open / close valves 38 and 58 are opened. When the rod is inserted into the storage cylinder 38b, the storage unit 38a is rotated and the first body 32 is rotated. The main body 32 and the second body 52 are opened so that the activated carbon falls to the lower side.

Activated carbon passing through the open / close valves 38 and 58 is discharged while maintaining a constant discharge amount by the rotary valves 36a and 56a.

Subsequently, the activated carbon discharged from the first body 32 and the second body 52 is filled in the regeneration tower 60 and heated with hot air to separate SOx and NOX adsorbed on the activated carbon from the activated carbon to regenerate the activated carbon. Step S60 proceeds.

Regenerating the activated carbon (S60) is a step of determining whether the stacked height of the activated carbon of the storage 102 installed in the inlet of the regeneration tower 60 is less than or equal to the set value (S62), and if the stacked height of the activated carbon is less than or equal to the set value, the first adsorption Activated carbon discharged from the first adsorption part 30 and the second adsorption part 50 by opening the first valve 104 installed between the part 30 and the second adsorption part 50 and the reservoir 102. Supplying to the reservoir 102 (S64), and adjusting the opening amount of the second valve 112 installed at the outlet of the regeneration tower when the stacking height of the activated carbon is less than or equal to the set value (S66).

Activated carbon stacked in the reservoir 102 maintains the stacking height of the set value or more, so that the amount of activated carbon supplied into the regeneration tower 60 from the reservoir 102 can be kept constant.

In addition, when the stacking height of the activated carbon exceeds the set value, the step S68 of closing the first valve 104 proceeds, and after the closing of the first valve 104 proceeds, the stacking height of the activated carbon of the storage 102 is set. It is determined whether or not it is less than (S62).

Therefore, if the stack height of activated carbon of the reservoir 102 is less than or equal to the set value, the first valve 104 is opened to supply activated carbon to the reservoir 102, and if the stack height of activated carbon exceeds the set value, the first valve 104 is closed. The process is continuous.

As described above, if the activated carbon stacking height of the storage 102 is maintained to exceed the set value, the temperature of the interior of the recycling tower 60 may be maintained because the amount of activated carbon supplied from the storage 102 to the regeneration tower 60 may be kept constant. And the pressure becomes constant.

In addition, when the activated carbon stacking height of the storage 102 is less than or equal to the set value, the step (S66) of controlling the second valve 112 installed at the outlet of the regeneration tower 60 is performed.

When the activated carbon stack height of the reservoir 102 is lower than the set value, the opening degree of the second valve 112 is reduced or closed.

Therefore, since the amount of activated carbon discharged from the regeneration tower 60 is reduced or blocked, it is possible to suppress an increase in the empty space in which the activated carbon is not filled in the regeneration tower 60. And it becomes possible to prevent passing through the cooling part 66 in a short time.

As described above, since the time during which the activated carbon passes through the heating portion is maintained at the inside of the regeneration tower 60, the regeneration efficiency of the regeneration tower 60 is improved.

In addition, when the stacked height of activated carbon in the reservoir 102 exceeds the set value, the first valve 104 is closed and the opening amount of the second valve 112 is increased, so that the activated carbon passing through the regeneration tower 60 passes. The time is kept almost uniform.

The regeneration tower exhaust gas is discharged from the regeneration tower 60 in which the regeneration process of the activated carbon is performed, and the regeneration tower exhaust gas is filled in the storage tank 90 and then reacts with the reaction tank 82 along the second injection pipe 86 at a constant pressure. Is supplied.

Since the washing water is supplied to the first injection pipe 84 installed above the second injection pipe 86, the washing water is injected into the regeneration tower discharge gas injected into the reaction tank 82.

Regeneration tower emissions are neutralized because the salts are produced by the reaction of the wash water and the regeneration tower emissions.

When the second injection pipe 86 of the present embodiment is connected to the downcomer 80 installed in the Hwaseong plant, ordination circulating the downcomer 80 is supplied through the first injection pipe 84, and the downcomer ( 80 is supplied with coke oven exhaust gas.

This can be easily changed and implemented by those skilled in the art having recognized the technical configuration of the present invention will not be described in detail drawings or description of other embodiments.

As a result, it is possible to provide an exhaust gas treating apparatus for a sintering machine capable of effectively removing SOX and NOX components by removing moisture included in the exhaust gas, and a method of treating the same.

While the present invention has been particularly shown and described with reference to exemplary embodiments thereof, it is to be understood that the invention is not limited to the disclosed embodiments, but, on the contrary, is intended to cover various modifications and equivalent arrangements included within the spirit and scope of the appended claims. .

In addition, the exhaust gas treatment apparatus for a sintering machine and its treatment method have been described as an example, but this is merely exemplary, and the exhaust gas treatment apparatus and the treatment method of the present invention may be used in other products other than the sintering machine.

Accordingly, the true scope of the present invention should be determined by the following claims.

10: sintering machine 20: filter part
30: first adsorption portion 32: first body
32a: first inlet 32b: first exhaust
32c: first guide part 34: first input part
34a: first adsorption reservoir 34b: first adsorption level sensor
34c: first suction valve 36: first discharge part
36a: first rotary valve 40: main fan
50: second adsorption portion 52: second body
52a: second intake port 52b: second exhaust port
52c: second guide portion 54: second inlet
54a: second adsorption reservoir 54b: second adsorption level sensor
54c: second suction valve 56: second discharge part
56a: second rotary valve 58: reaction part
58a: blocking panel 58b: bypass passage
58c: injection part 60: regeneration tower
62: main body 64: heating unit
66: cooling unit 70: chimney
80: downcomer 82: reaction tank
84: first injection tube 86: second injection tube
90: storage tank 100: supply unit
102: storage 104: first valve
106: level sensor 108: control unit
110: outlet 112: second valve
120: heat exchanger 121: tub
122: drum 122a: drain hole
123: drive unit 124: first supply pipe
125: second supply pipe 126: drain pipe
126a: U-trap 127: exhaust pipe

Claims (5)

A first adsorption part for removing SOX in exhaust gas discharged from the sintering machine;
A main fan for pumping the exhaust gas passing through the first adsorption unit to be heated above an acid dew point;
A second adsorption part for removing NOX contained in the exhaust gas pressurized by the main fan; And
And a heat exchanger for removing moisture contained in the exhaust gas supplied to the first adsorption unit or the second adsorption unit.
The method of claim 1, wherein the heat exchange unit,
A tub for collecting condensate;
A drum rotatably installed in the tub and having a drainage hole formed therein;
A drive unit installed at the tub to rotate the drum;
A first supply pipe supplying exhaust gas of the sintering machine to the drum;
A second supply pipe for supplying low temperature dry air into the tub;
An exhaust pipe for supplying exhaust gas discharged from the drum to the first adsorption unit or the second adsorption unit; And
And a drain pipe for discharging condensate generated inside the tub to the outside.
The method of claim 2,
The discharge pipe for the sintering apparatus, characterized in that the drain pipe is provided with a condensed water trap unit.
(a) removing dust contained in exhaust gas of the sintering machine;
(b) removing moisture contained in the dust-removed exhaust gas;
(c) using the activated carbon as a catalyst to remove SOX contained in the exhaust gas;
(d) heating the exhaust gas to at least an acid dew point; And
(e) removing the NOx contained in the heated exhaust gas using activated carbon as a catalyst.
5. The method of claim 4,
Step (b) is a waste gas treatment method for a sintering apparatus, characterized in that by rotating the exhaust gas of the sintering machine to generate a whirlwind, spraying low-temperature dry air to the exhaust gas.

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