KR20150014337A - Mercury removing device and mercury removing method - Google Patents

Abstract

Disclosed are a device and a method for removing mercury to reuse an absorbent supplied to remove mercury. The disclosed device for removing mercury comprises a spraying nozzle unit spraying the absorbent to remove mercury to exhaust gas of a dust collector; a supply line unit transporting the absorbent to the spraying nozzle unit; a discharge line unit transporting the absorbent discharged from the dust collector; and a recirculation unit selecting whether the absorbent transported from the discharge line unit is reused or not.

Description

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a mercury removal device and a mercury removal method,

The present invention relates to a mercury removal device and a mercury removal method, and more particularly, to a mercury removal device and a mercury removal method which enable reuse of an adsorbent supplied for mercury removal.

In general, mercury is currently used extensively throughout the industrial field, and numerous studies related to mercury human hazards have been conducted, and the risks have been well proven, but the use of alternative materials is still very limited and widely used. Although mercury is the most emitted in the natural world such as volcanic eruption, other industrial activities such as coal-fired plants such as thermal power plants are producing the largest amount of human activity. Medical waste incineration facilities, municipal solid waste incineration facilities, cement And manufacturing facilities are known as major sources of mercury.

Recently, studies on the reduction of mercury have been actively conducted.

A related prior art is Korean Registered Patent No. 10-0752327 (Registered on Aug. 20, 2007, entitled "Method and Apparatus for Removing Mercury in Incinerator Flue Gas Using Blast Furnace Slag").

It is an object of the present invention to provide a mercury removal device and a mercury removal method which enable reuse of the adsorbent supplied for mercury removal.

The apparatus for removing mercury according to the present invention comprises: a spray nozzle part for spraying an adsorbent for mercury removal onto an exhaust gas of a dust collector; A feed line unit for feeding the adsorbent to the injection nozzle unit; A discharge line unit for transferring the adsorbent discharged from the dust collector; And a circulation unit for selecting whether to reuse the adsorbent transferred from the discharge line unit; And a control unit.

Here, the circulation unit may include a waste silo connected to the discharge line unit to store the adsorbent therein; A waste section connected to the waste silo for discarding the adsorbent accumulated in the waste silo; And a discharge valve connected to the waste silo, the supply line portion and the waste portion, the discharge valve selecting one of the supply line portion and the waste portion to discharge the adsorbent accumulated in the waste silo; And a control unit.

Here, the circulation unit may include: a circulation control unit for controlling opening and closing operations of the discharge valve or adjusting an injection amount of the adsorbent; A charging unit provided between the discharge valve and the supply line unit to supply a new adsorbent to the supply line unit; And a supply restricting unit provided in the supply line unit to regulate a feed amount of the adsorbent; And at least one of the following:

Here, the circulation control unit may include: a detector for detecting the mercury removal rate of the adsorbent discharged from the dust collector; And an adjustment control unit for controlling opening and closing operations of the discharge valve or adjusting an injection amount of the adsorbent according to the mercury removal rate detected through the detection unit. And a control unit.

Here, the circulation control unit may include: a comparison unit comparing a mercury removal rate detected through the detection unit with a predetermined mercury removal rate; And further comprising:

Here, the charging unit includes: a supply hopper in which a new adsorbent is stored; And a supply valve for regulating the amount of the adsorbent discharged from the supply hopper so that the adsorbent of the supply hopper is supplied to the supply line portion; And a control unit.

Here, the supply restricting portion may include: a restriction storing portion for storing the adsorbent discharged from the charging silo or the charging silo; And a restriction valve for regulating a feed amount of the adsorbent discharged from the restriction storage part; And a control unit.

Here, the circulation control unit controls the operation of at least one of the charging unit and the supply restriction unit.

The method for removing mercury according to the present invention includes: a supply step of transferring an adsorbent for mercury removal to a dust collector; A spraying step of spraying the adsorbent transferred through the supplying step onto an exhaust gas of the dust collector; A discharging step of transferring the adsorbent discharged from the dust collector; And a circulation step of selecting whether to reuse the adsorbent transferred through the discharge step; And a control unit.

Here, the circulation step may include accumulating the adsorbent transferred through the discharging step; And a selection step of selecting whether to discharge the adsorbent accumulated through the accumulation step; Wherein the adsorbent is discharged for disposal or delivered to the dust collector according to the selection of the selection step.

Here, the circulation step may include: a circulation control step of controlling the selection operation of the selection step or adjusting the injection amount of the adsorbent; A supply step of supplying a new adsorbent to the supply step according to the selection of the selection step; And a supply restricting step of regulating a transfer amount of the adsorbent in the supply step; And at least one of the following:

Here, the circulation controlling step may include: a detecting step of detecting a mercury removal rate of the adsorbent discharged from the dust collector; And an adjustment control step of controlling the selection operation of the selection step or adjusting the injection amount of the adsorbent according to the mercury removal rate detected through the detection step. And a control unit.

Here, the circulation control step may include: a comparison step of comparing a mercury removal rate detected through the detection step with a predetermined mercury removal rate; And further comprising:

Here, the filling step may include: a storing step in which a new adsorbent is stored; And an opening and closing step of adjusting a transfer amount of the new adsorbent stored through the storing step; And a control unit.

Here, the supply restricting step may include: a storage restricting step of storing the adsorbent prior to the supplying step; And a restriction adjustment step of adjusting a feed amount of the adsorbent stored through the restriction storage step; And further comprising:

Here, the circulation control step may control the operations of the charging step and the supply restriction step.

The mercury removal device and the mercury removal method according to the present invention can reuse the adsorbent supplied for mercury removal.

Further, the present invention can improve the mercury removal rate in the flue gas.

In addition, the present invention can reduce operating costs for mercury removal upon reuse of the adsorbent.

Further, the present invention enables continuous operation of the dust collector and can continuously remove mercury from the flue gas.

1 is a flow diagram illustrating a mercury removal apparatus according to an embodiment of the present invention.
2 is a view showing a first modification of the circulation unit in the mercury removal device according to the embodiment of the present invention.
3 is a view showing a second modification of the circulation unit in the mercury removal device according to the embodiment of the present invention.
4 is a block diagram illustrating a mercury removal method according to an embodiment of the present invention.
5 is a flowchart illustrating a mercury removal method according to an embodiment of the present invention.

Hereinafter, an embodiment of a mercury removal device and a mercury removal method according to the present invention will be described with reference to the accompanying drawings. 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 defined in consideration of the functions of the present invention, which may vary depending on the intention of the user, the operator, or the custom. Therefore, definitions of these terms should be made based on the contents throughout this specification.

2 is a view showing a first modified example of the circulation unit in the mercury removal device according to the embodiment of the present invention, and FIG. 3 is a cross-sectional view of the mercury removal device according to the first embodiment of the present invention. Is a view showing a second modification of the circulation unit in the mercury removal device according to an embodiment of the present invention.

1 to 3, a mercury removal device according to an embodiment of the present invention is an apparatus for removing mercury (Hg) from an exhaust gas supplied to a dust collector 10, and includes an injection nozzle unit 20, (30), a discharge line portion (40), and a circulation unit (50).

The dust collector 10 removes foreign matters including dust from the exhaust gas as the exhaust gas passes through. At this time, as the adsorbent is supplied to the dust collector 10, the foreign material includes an adsorbent adsorbing mercury (Hg).

The dust collector 10 is provided with an inlet 11 to which exhaust gas is supplied, an exhaust port 12 through which the exhaust gas is exhausted, and an exhaust port 13 through which foreign substances to be filtered by the dust collector 10 are discharged.

The exhaust gas discharged from the dust collector 10 can be discharged to the atmosphere through the flue 15 connected to the discharge port 13.

Here, the type of the dust collector 10 is not limited, and foreign substances including dust can be removed from the exhaust gas through the exhaust gas through various known types.

The injection nozzle unit 20 injects an adsorbent for removing mercury (Hg) into the exhaust gas of the dust collector 10. For example, the injection nozzle unit 20 can be installed in the air inlet 11 of the dust collector 10. By injecting the adsorbent with the inlet port 11, the exhaust gas and the adsorbent are mixed easily, and the adsorbent and mercury (Hg) are stably reacted in the exhaust gas.

The injection amount of the adsorbent injected from the injection nozzle unit 20 can be controlled and controlled through the circulation control unit 60 of the circulation unit 50.

The adsorbent according to an embodiment of the present invention may be activated carbon, zeolite, inorganic porous solid (alumina, silica, etc.), and activated carbon is most commonly used. Activated carbon can be used not only for mercury (Hg) but also for trace organic pollutants such as dioxins and inorganic gases such as sulfur oxides and nitrogen oxides.

In the case of activated carbon, impregnated activated carbon in which sulfur (S) or bromine (Br) impregnated with mercury (Hg) is easily adsorbed can be used as an adsorbent although the efficiency of removing mercury from the exhaust gas is low.

For example, impregnated impregnated activated carbon impregnated with sulfur (S) is impregnated with sulfur (S) in pulverized activated carbon, and impregnated sulfur (S) reacts with mercury (Hg) can do.

In particular, sulfur (S) in the impregnated activated carbon can adsorb and remove mercury (Hg) in the exhaust gas according to the following reaction formula, as it adsorbs vapor mercury (Hg) directly.

Hg (vapor) + C-S = C-HgS (solid)

Here, Hg (vapor) represents vapor-phase mercury (Hg), CS represents impregnated activated carbon impregnated with sulfur (S), and C-HgS (solid) represents a state in which mercury .

The supply line unit 30 transfers the adsorbent for mercury (Hg) removal to the injection nozzle unit 20.

The supply line unit 30 may be composed of a nematic transfer facility using compressed air.

Here, the supply line portion 30 is not limited, and the adsorbent can be transferred to the injection nozzle portion 20 through various known types.

The discharge line portion 40 transfers the adsorbent discharged from the discharge port 13 of the dust collector 10.

The discharge line section 40 may be composed of a nematic transfer facility using compressed air.

Here, the discharge line portion 40 is not limited, and the adsorbent discharged from the discharge port 13 of the dust collector 10 is transferred through various known types.

The circulation unit (50) selects whether or not the adsorbent conveyed in the discharge line section (40) is reused.

The circulation unit 50 includes a waste silo 52, a waste portion 54, and a discharge valve 55.

The waste silo (52) is connected to the discharge line section (40) to accumulate the adsorbent conveyed through the discharge line section (40).

The waste portion 54 is connected to the waste silo 52 for disposal of the adsorbent accumulated in the waste silo 52.

The discharge valve 55 is connected to the waste silo 52, the supply line portion 30 and the waste portion 54. The discharge valve 55 selects one of the supply line portion 30 and the waste portion 54 so that the adsorbent accumulated in the waste silo 52 is discharged.

The adsorbent accumulated in the waste silo 52 is discharged to the supply line portion 30 or discharged to the waste portion 54 in accordance with the opening and closing operation of the discharge valve 55.

The discharge valve 55 may be composed of a three-way valve installed at a lower portion of the waste silo 52.

The circulation unit 50 may further include at least one of a circulation control unit 60, a charging unit 70, and a supply restriction unit 80.

The circulation control unit 60 controls the opening and closing operation of the discharge valve 55 or regulates the injection amount of the adsorbent.

For example, the circulation control unit 60 controls the opening / closing operation of the discharge valve 55 or adjusts the injection amount of the adsorbent according to the predetermined mercury removal rate of the supplied adsorbent to determine whether or not the adsorbent accumulated in the waste silo 52 is reused You can choose.

As another example, the circulation control unit 60 may include a detection unit 61 and an adjustment control unit 62, and may further include a comparison unit 63. [

The detector 61 detects the mercury removal rate of the adsorbent discharged from the dust collector 10. The detecting unit 61 may be installed in the air inlet 11 and the air outlet 12, respectively, of the dust collector 10.

The detection unit 61 measures mercury Hg in the exhaust port 11 by measuring mercury Hg in the exhaust gas supplied to the dust collector 10 and measuring mercury Hg in the exhaust gas discharged from the dust collector 10, And the mercury (Hg) measurement value on the side of the exhaust port 12 can be used to detect the mercury removal rate of the adsorbent supplied to the dust collector 10.

The detection unit 61 can calculate the mercury removal rate of the adsorbent by measuring mercury (Hg) in the adsorbent discharged from the dust collector 10.

Here, the method of measuring mercury through the detecting unit 61 is not limited, and the mercury removal rate of the adsorbent supplied to the dust collector 10 can be detected by measuring mercury (Hg) through various known methods.

The adjustment control unit 62 controls the open / close operation of the discharge valve 55 or adjusts the injection amount of the adsorbent according to the mercury removal rate detected through the detection unit 61.

The comparator 63 compares the mercury removal rate (detection value) detected through the detection unit 61 with the predetermined mercury removal rate (setting value). The comparison unit 63 may control the opening and closing operation of the discharge valve 55 or adjust the injection amount of the adsorbent by operating the adjustment control unit 62 according to the comparison between the detection value and the set value.

For example, when the mercury removal rate detected through the detection unit 61 is lower than a preset mercury removal rate, the comparison unit 63 controls the opening / closing operation of the discharge valve 55 through the adjustment control unit 62, Can be discharged to the supply line unit 30 or the injection amount of the adsorbent injected from the injection nozzle unit 20 through the regulation control unit 62 can be adjusted.

If the mercury removal rate detected through the detection unit 61 is equal to or higher than a preset mercury removal rate, the comparator 63 controls the opening and closing operation of the discharge valve 55 through the regulation control unit 62 to control the operation of the waste silo 52 Can be discharged to the waste part 54 or the injection amount of the adsorbent injected from the injection nozzle part 20 through the regulation control part 62 can be adjusted.

The circulation control unit 60 may control the operation of at least one of the charging unit 70 and the supply restricting unit 80 when it further includes at least one of the charging unit 70 and the supply restricting unit 80 .

The charging unit 70 is provided between the discharge valve 55 and the supply line unit 30 to supply a new adsorbent to the supply line unit 30. [

The charging section 70 may include a supply hopper 71 and a supply valve 72.

The feed hopper 71 stores a new adsorbent.

The supply valve 72 regulates the amount of the adsorbent discharged from the supply hopper 71 so that the adsorbent of the supply hopper 71 is supplied to the supply line portion 30. [ The supply valve 72 can open and close the supply hopper 71.

The supply valve 72 can be controlled to open and close by the adjustment control part 62 of the circulation control part 60. [

For example, when the waste silo 52 is communicated with the waste portion 54, the supply valve 72 may be opened by the adjustment control portion 62 to supply the new adsorbent to the supply line portion 30. [ At this time, the feed amount of the new adsorbent can be adjusted.

The supply valve 72 is opened by the regulation control part 62 in a state where the waste silo 52 and the supply line part 30 are in communication with each other so that a new adsorbent can be supplied to the supply line part 30. [ At this time, the feed amount of the new adsorbent can be adjusted.

The supply restricting portion 80 is provided in the supply line portion 30 to regulate the amount of the adsorbent to be delivered.

The supply restriction section 80 may include a restriction storage section 81 and a restriction valve 82. [

The restriction storage section 81 stores the adsorbent discharged from the supply silo 52 or the supply hopper 71 of the charging section 70. [

The restriction valve (82) regulates the amount of the adsorbent to be discharged from the restriction reservoir (81). The restriction valve 82 can open and close the restriction storage part 81. [

The opening and closing operation of the restriction valve 82 can be controlled by the regulation control part 62 of the circulation control part 60. [

For example, in a state in which the waste silo 52 and the supply line section 30 are communicated, the regulation valve 62 is opened by the regulation control section 62 so that the adsorbent of the restriction storage section 81 is supplied to the supply line section 30, . At this time, the feed amount of the adsorbent can be adjusted.

The circulation unit 50 may further include a filter unit 51 for filtering the adsorbent in the nematic transfer facility when the discharge line unit 40 is constructed of a nematic transfer facility.

Hereinafter, a mercury removal method according to an embodiment of the present invention will be described.

FIG. 4 is a block diagram illustrating a mercury removal method according to an embodiment of the present invention, and FIG. 5 is a flowchart illustrating a mercury removal method according to an embodiment of the present invention.

4 and 5, a mercury removal method according to an embodiment of the present invention includes a supply step S1, a spraying step S2, a discharge step S4, and a circulation step S5 , And a dust collecting step (S3).

The feeding step (S1) feeds the adsorbent for mercury removal to the dust collector (10). The supplying step S1 can transfer the adsorbent to the suction port 11 side of the dust collector 10 through the supply line portion 30. [

The injecting step S2 injects the adsorbent transferred through the supplying step S1 into the exhaust gas of the dust collector 10. The injection step S2 can inject the adsorbent to the exhaust gas supplied to the inlet 11 of the dust collector 10 through the injection nozzle unit 20. [

In the dust collecting step S3, the adsorbent injected through the injecting step S2 reacts with the flue gas to remove mercury Hg from the flue gas. In the dust collecting step S3, the adsorbent passes through the dust collector 10, (Hg), and the adsorbent to which mercury (Hg) is adsorbed is collected at the discharge port (13) side of the dust collector (10). The dust collecting step (S3) can remove the foreign matter from the exhaust gas through the dust collector (10).

The discharging step S4 transports the adsorbent discharged from the dust collector 10. The discharge step S4 transfers the adsorbent discharged from the discharge port 13 of the dust collector 10 to the circulation unit 50 side through the discharge line portion 40.

The circulation step S5 selects whether or not the adsorbent conveyed through the discharge step S4 is reused. The circulation step S5 can select whether or not the adsorbent accumulated in the waste silo 52 is reused through the circulation unit 50. [

The circulation step S5 includes an accumulation step S51 and a selection step S52.

In the accumulating step S51, the adsorbent conveyed through the discharging step S4 is accumulated. The accumulation step S51 can accumulate the adsorbent conveyed through the discharge line section 40 through the waste silo 52. [

The selection step S52 selects whether or not the adsorbent accumulated through the accumulation step S51 is discharged. The selection step S52 can select whether to discharge the adsorbent accumulated in the waste silo 52 through the discharge valve 55. [

Depending on the selection of the selection step S52, the adsorbent is discharged for disposal or re-transported to the dust collector 10. Here, the selection step S52 includes a reuse step S52-1 in which the adsorbent accumulated via the accumulation step S51 is transferred to the supply step S1, and a step S52-1 in which the adsorbent accumulated via the accumulation step S51 is discarded And a disposal step S52-2 for discharging may be included.

The reuse step S52-1 discharges the adsorbent accumulated in the waste silo 52 to the supply line part 30 in accordance with the opening and closing operation of the discharge valve 55 and the disposal step S52-2 discharges the adsorbent accumulated in the discharge silo 52 to the discharge line 55 And discharges the adsorbent accumulated in the waste silo 52 to the waste part 54 according to the opening /

The circulation step S5 may further include at least one of a circulation control step S6, a charging step S7, and a supply restricting step S8.

The circulation control step S6 controls the selection operation of the selection step S52 or regulates the injection amount of the adsorbent. The circulation control step S6 may control the opening and closing operation of the discharge valve 55 or adjust the injection amount of the adsorbent through the circulation control unit 60. [

For example, the circulation control step S6 may control the opening and closing operation of the discharge valve 55 or adjust the injection amount of the adsorbent according to a predetermined mercury removal rate of the supplied adsorbent.

As another example, the circulation controlling step S6 may include a detecting step S61 and an adjusting controlling step S62, and may further comprise a comparing step S63.

The detecting step S61 detects the mercury removal rate of the adsorbent discharged from the dust collector 10. The detecting step can detect the mercury removal rate of the adsorbent discharged from the dust collector 10 through the detector 61. [

The adjustment control step S62 may control the selection operation of the selection step S52 or adjust the injection amount of the adsorbent according to the mercury removal rate detected through the detection step S61. The adjustment control step S62 may control the open / close operation of the discharge valve 55 or adjust the injection amount of the adsorbent through the adjustment control part 62. [

The adjustment control step S62 may include a reuse control step S62-1, a discard control step S62-2, and an injection amount adjustment step S62-3.

The reuse control step (S62-1) controls the selection operation of the selection step (S52) to select the reuse step (S52-1) in the selection step (S52). The reuse control step S62-1 may control the opening and closing operation of the discharge valve 55 through the regulation control part 62 so that the waste silo 52 and the supply line part 30 are communicated with each other.

The discard control step (S62-2) controls the selection operation of the selection step (S52) to select the discard step (S52-2) in the selection step (S52). The disposal control step S62-2 may control the opening and closing operation of the discharge valve 55 through the regulation control part 62 so that the waste silo 52 and the waste part 54 communicate with each other.

The injection amount adjustment step S62-3 adjusts the injection amount of the adsorbent in the injection step S2 according to the selection operation of the selection step S52. The injection amount adjustment step S62-3 may adjust the injection amount of the adsorbent injected from the injection nozzle unit 20 through the adjustment control unit 62. [

The comparison step S63 compares the mercury removal rate detected through the detection step S61 with the predetermined mercury removal rate. The comparison step S63 compares the mercury removal rate (detection value) detected through the detection unit 61 of the circulation control unit 60 with the predetermined mercury removal rate (setting value).

The comparison step S63 may control the opening and closing operation of the discharge valve 55 or adjust the injection amount of the adsorbent by operating the regulation control part 62 according to a comparison between the detection value and the set value through the comparison part 63. [

If the circulation control step S6 further includes at least one of the charging step S7 and the supply restricting step S8, at least one of the charging step S7 and the supply restricting step S8 can be controlled have.

The charging step S7 supplies a new adsorbent to the supplying step S1 according to the selection of the selection step S52. The charging step S7 can supply the new adsorbent to the supply line unit 30 through the charging unit 70. [

The charging step S7 may include a storing step S71 and an opening and closing step S72.

In the storing step S71, a new adsorbent is stored. The storing step S71 may store the new adsorbent through the feed hopper 71. [

The opening and closing step S72 adjusts the amount of the fresh adsorbent stored through the storing step S71. The opening and closing step S72 may control the amount of the adsorbent to be discharged from the supply hopper 71 through the supply valve 72. [

The opening and closing step S72 can adjust the feeding amount of the new adsorbent by the adjustment control step S62 of the circulation control step S6. The opening and closing operation of the supply valve 72 is controlled by the adjustment control unit 62 of the circulation control unit 60 so that the amount of the new adsorbent discharged from the supply hopper 71 can be controlled.

The supply restricting step (S8) regulates the amount of the adsorbent to be delivered in the supply step (S1). The supply restriction step S8 may adjust the amount of the adsorbent to be delivered from the supply line unit 30 through the supply restricting unit 80. [

The supply restricting step S8 may include a storage restricting step S81 and a limiting opening / closing step S82.

The storage limiting step S81 stores the adsorbent discharged through the accumulating step S51 or the charging step S7 prior to the supplying step S1. The storage limiting step S81 may store the adsorbent discharged from the supply silo 52 or the supply hopper 71 of the charger 70 through the restriction storage unit 81. [

The limiting opening and closing step S82 adjusts the amount of the adsorbent stored through the limiting storing step S71. The limiting opening and closing step S82 can adjust the amount of the adsorbent to be discharged from the restriction storage section 81 through the restriction valve 82. [

The limiting opening and closing step S82 can adjust the amount of the adsorbent to be conveyed by the adjustment control step S62 of the circulation control step S6. In the limiting opening and closing step S82, the opening and closing operation of the restriction valve 82 is controlled by the regulation control unit 62 of the circulation control unit 60, so that the amount of the adsorbent discharged from the restriction storage unit 81 can be adjusted.

According to the mercury removal device and the mercury removal method described above, the adsorbent supplied for mercury removal can be reused.

Further, the present invention can improve the mercury removal rate in the flue gas.

In addition, the present invention can reduce operating costs for mercury removal upon reuse of the adsorbent.

Further, the present invention enables the continuous operation of the dust collector 10 and can continuously remove mercury from the flue gas.

While the present invention has been particularly shown and described with reference to exemplary embodiments thereof, it will be understood by those of ordinary skill in the art that various changes in form and details may be made therein without departing from the spirit and scope of the invention as defined by the appended claims. I will understand.

Accordingly, the true scope of protection of the present invention should be defined by the claims.

10: dust collector 11: intake port
12: exhaust port 13: exhaust port
15: Year 20: Injection nozzle part
30: supply line portion 40: discharge line portion
50: circulation unit 51: filter unit
52: waste silo 54: waste part
55: discharge valve 60: circulation control part
61: detecting section 62:
63: comparison unit 70:
71: feed hopper 72: feed valve
80: supply restriction unit 81: restriction storage unit
82: restriction valve
S1: supply step S2: injection step
S3: dust collection step S4: discharge step
S5: circulation step S51: accumulation step
S52: Selection step S52-1: Reuse step
S52-2: Discard step S6: Circulation control step
S61: Detecting step S62: Adjusting control step
S62-1: Reuse control step S62-2: Disposal control step
S62-3: injection amount adjustment step S63: comparison step
S7: charging step S71: storing step
S72: opening / closing step S8: supply restriction step
S81: storage restricting step S82: limiting opening / closing step

Claims (16)

An injection nozzle for injecting an adsorbent for mercury removal into the exhaust gas of the dust collector;
A feed line unit for feeding the adsorbent to the injection nozzle unit;
A discharge line unit for transferring the adsorbent discharged from the dust collector; And
A circulation unit for selecting whether to reuse the adsorbent transferred from the discharge line unit; Wherein the mercury removal device comprises:
The method according to claim 1,
The circulation unit includes:
A waste silo connected to the discharge line portion and storing the adsorbent;
A waste section connected to the waste silo for discarding the adsorbent accumulated in the waste silo; And
A discharge valve connected to the waste silo, the supply line part, and the waste part to select one of the supply line part and the waste part to discharge the adsorbent accumulated in the waste silo; Wherein the mercury removal device comprises:
3. The method of claim 2,
The circulation unit includes:
A circulation control unit for controlling the opening and closing operation of the discharge valve or adjusting the injection amount of the adsorbent;
A charging unit provided between the discharge valve and the supply line unit to supply a new adsorbent to the supply line unit; And
A supply restricting portion provided in the supply line portion and adjusting a feed amount of the adsorbent;
Wherein the mercury removal device further comprises:
The method of claim 3,
The circulation control unit,
A detector for detecting a mercury removal rate of the adsorbent discharged from the dust collector; And
An adjustment control unit for controlling the opening and closing operation of the discharge valve or adjusting the injection amount of the adsorbent according to the mercury removal rate detected through the detection unit; Wherein the mercury removal device comprises:
5. The method of claim 4,
The circulation control unit,
A comparison unit comparing a mercury removal rate detected through the detection unit with a predetermined mercury removal rate; Further comprising a mercury removal device for removing mercury.
The method of claim 3,
The charging unit includes:
A feed hopper in which a fresh adsorbent is stored; And
A supply valve for regulating the amount of the adsorbent discharged from the supply hopper so that the adsorbent of the supply hopper is supplied to the supply line portion; Wherein the mercury removal device comprises:
The method of claim 3,
The supply restriction unit
A limiting storage for storing the adsorbent discharged from the charging silo or the charging silo; And
A restriction valve that adjusts a feed amount of the adsorbent discharged from the restriction storage part; Wherein the mercury removal device comprises:
8. The method according to any one of claims 3 to 7,
The circulation control unit,
And controls the operation of at least one of the charging unit and the supply restricting unit.
A feeding step of feeding an adsorbent for mercury removal to a dust collector;
A spraying step of spraying the adsorbent transferred through the supplying step onto an exhaust gas of the dust collector;
A discharging step of transferring the adsorbent discharged from the dust collector; And
A circulation step of selecting whether to reuse the adsorbent transferred through the discharge step; And removing the mercury from the mercury.
10. The method of claim 9,
Wherein the circulating step comprises:
An accumulation step of accumulating the adsorbent transferred through the discharge step; And
A selection step of selecting whether to discharge the adsorbent accumulated through the accumulation step; Lt; / RTI >
Wherein the adsorbent is discharged for disposal or delivered to the dust collector according to the selection of the selection step.
11. The method of claim 10,
Wherein the circulating step comprises:
A circulation control step of controlling a selection operation of the selection step or adjusting an injection amount of the adsorbent;
A supply step of supplying a new adsorbent to the supply step according to the selection of the selection step; And
A supply restricting step of regulating a feed amount of the adsorbent in the supply step;
Wherein the mercury removal method further comprises:
12. The method of claim 11,
Wherein the circulation control step comprises:
A detecting step of detecting a mercury removal rate of the adsorbent discharged from the dust collector; And
An adjustment control step of controlling the selection operation of the selection step or adjusting the injection amount of the adsorbent according to the mercury removal rate detected through the detection step; And removing the mercury from the mercury.
13. The method of claim 12,
Wherein the circulation control step comprises:
A comparison step of comparing a mercury removal rate detected through the detection step with a predetermined mercury removal rate; Further comprising the steps of:
12. The method of claim 11,
In the charging step,
A storage step in which a new adsorbent is stored; And
An opening and closing step of adjusting the amount of the fresh adsorbent stored through the storing step; And removing the mercury from the mercury.
12. The method of claim 11,
The supply restriction step includes:
A storage limiting step of storing the adsorbent prior to the supplying step; And
A restriction regulating step of regulating the amount of the adsorbent transferred via the restriction storing step; Further comprising the steps of:
16. The method according to any one of claims 11 to 15,
Wherein the circulation control step comprises:
And controlling the operation of the charging step and the supply restricting step.

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