KR20200066406A - Apparuatus and method for neutraling of collected water in bischoff scrubber - Google Patents

Abstract

The present invention relates to an apparatus of neutralizing pH of collected water used in a Bischoff scrubber which is wet dedusting equipment for purifying a gas generated in a furnace, and a method thereof. An apparatus of neutralizing collected water according to an embodiment of the present invention comprises: a pure oxygen combustion chamber for combusting a blast furnace gas; a blast furnace gas line connected to one inlet of the pure oxygen combustion chamber, and drawn out from a clean blast furnace gas line; a combustion air supply line for supplying combustion air to the pure oxygen combustion chamber, and connected to the other inlet of the pure oxygen combustion chamber; a pure oxygen supply line for supplying combustion pure oxygen to the pure oxygen combustion chamber, and connected to the combustion air supply line at the other inlet of the pure oxygen combustion chamber; a combustion gas discharge line for discharging a blast furnace gas combusted in the pure oxygen combustion chamber, and connected to an outlet of the pure oxygen combustion chamber; a cooling combustion gas line connected to a rear end of the combustion gas discharge line, and cooling the combustion gas; a combustion gas blowing apparatus connected to a rear end of the cooling combustion gas line; and a degassing tower for receiving the combustion gas from the combustion gas blowing apparatus, and neutralizing collected water introduced from a Bischoff scrubber.

Description

Bishop Scrubber's neutralization device and method for neutralization{APPARUATUS AND METHOD FOR NEUTRALING OF COLLECTED WATER IN BISCHOFF SCRUBBER}

The present invention relates to an apparatus and method for neutralizing the pH of a water collecting agent used in a bishop scrubber, a wet dedusting facility for purifying gas generated in a blast furnace.

The blast furnace gas (BFG) generated at a blast furnace plant at a steel mill is usually removed by a cyclone method in a dust catcher for refining, followed by a wet scrubber (bischoff scrubber, hereinafter called Bishop Scrubber or Bishop). ), and the remaining dust cannot be removed.

The collected dust discharged in the form of dust and water contained in the blast furnace gas from the bishop scrubber flows into the degassing tower, and then the dissolved gas in the dust collector is separated. Thereafter, the collected water discharged from the degassing tower is transferred to a concentrating tank, whereby natural sedimentation and coagulation and precipitation occur. The sludge generated in the concentrating tank is dehydrated through a drum filetr and treated in a cake form. After the coagulation and precipitation, the supernatant remaining in the concentration tank is sent to a storage tank, combined with supplemental water, and then introduced into a water supply tank, and then reused after being sprinkled inside the bishop scrubber.

However, the pH of the collecting water discharged from the degassing tower is very high, and as a result, there is a problem in that the life of the pump, the drain pipe or the valve is shortened or the damage occurs frequently in the circulation process of the collecting water. Therefore, it is necessary to find a way to lower the pH of the collected water generated in the bishop scrubber.

An object of the present invention is to provide a water collecting neutralization apparatus and method capable of effectively neutralizing water collecting with a high pH discharged from a bishop scrubber.

Another object of the present invention is to use a high content of carbon dioxide (CO ₂ ) in the blast furnace gas burned by using the blast furnace gas and pure oxygen gas to neutralize the dust collection which can significantly improve the neutralization of the water collection with the high pH. It is to provide an apparatus and method.

The objects of the present invention are not limited to the above-mentioned objects, and other objects and advantages of the present invention not mentioned can be understood by the following description, and will be more clearly understood by embodiments of the present invention. In addition, it will be readily appreciated that the objects and advantages of the present invention can be realized by means of the appended claims and combinations thereof.

In order to achieve the above object, the neutralization apparatus for collecting dust according to an embodiment of the present invention includes a pure oxygen combustion chamber for burning blast furnace gas; A blast furnace gas line connected to one side of the pure oxygen combustion chamber and drawn out of a clean blast furnace gas line; A combustion air supply line that supplies combustion air to the pure oxygen heat chamber, and is connected to another side of the pure oxygen combustion chamber; A pure oxygen supply line that supplies pure oxygen for combustion to the pure oxygen combustion chamber, and is connected to the combustion air supply line at the other side of the pure oxygen combustion chamber; A combustion gas discharge line that discharges blast furnace gas burned in the pure oxygen combustion chamber and is connected to an outlet side of the pure oxygen combustion chamber; A cooling combustion gas line connected to a rear end of the combustion gas discharge line to cool the combustion gas; A combustion gas blowing device connected to a rear end of the cooling combustion gas line; It may include a; degassing tower that receives the combustion gas from the combustion gas blowing device, and neutralizes the collected water flowing from the bishop scrubber.

Preferably, it may include a nitrogen line for purge that is interconnected with the blast furnace gas line at the one side of the pure oxygen combustion chamber.

Preferably, the pure oxygen combustion chamber includes a heat exchanger for recovering combustion heat in the combustion gas in which the blast furnace gas is burned; A heat medium pipe connected to the heat exchanger; And it is located at the top and the temperature detector for temperature measurement; may include.

Preferably, the combustion gas discharge line may include a secondary heat exchanger and a heat medium pipe for additionally recovering combustion heat in the combustion gas.

At this time, the combustion gas discharge line is located on the outlet side of the secondary heat exchanger, a combustion gas thermometer for measuring the temperature of the combustion gas, and a combustion gas carbon monoxide concentration meter for detecting incomplete combustion of the combustion gas; And a stack discharge line branched from the combustion gas discharge line for discharging surplus of combustion gas.

Preferably, the cooling combustion gas line may include a cooling water chiller for cooling the combustion gas, a compressor for compressing the combustion gas, and a compressed combustion gas receiver.

Preferably, the degassing tower may include a vent amount control valve on the inside.

In order to achieve the above object, a neutralization method for collecting dust according to another embodiment of the present invention includes: supplying blast furnace gas to a pure oxygen combustion chamber; The blast furnace gas being burned in the combustion chamber; Recovering the heat of combustion of the blast furnace gas; Cooling the combustion gas in which the blast furnace gas is burned; It may include; the step of supplying the combustion gas to the degassing tower.

Preferably, the blast furnace gas is a nitrogen purge step before the step of burning in the combustion chamber; may include.

Preferably, the step in which the blast furnace gas is burned in the combustion chamber is burned in an air atmosphere at the beginning of combustion and burned in a pure oxygen atmosphere at a later combustion step.

Preferably, the step of recovering combustion heat of the blast furnace gas may include a step of first recovering combustion heat in the combustion chamber and a step of secondarily recovering combustion heat outside the combustion chamber.

Preferably, prior to the step of cooling the combustion gas in which the blast furnace gas is burned, discharging a surplus of combustion gas may include.

Preferably, the step of boosting the combustion gas after the step of cooling the combustion gas in which the blast furnace gas is burned may include a.

Preferably, after the step of supplying the combustion gas to the degassing tower, adjusting the amount of the combustion gas vent in the degassing tower; may include.

According to the present invention, in the blowing device connected to the lower side of the degassing tower, the volume of 45-50% (hereinafter referred to as %) generated by the pure oxygen combustion device of the bishop scrubber collector neutralization device according to the embodiment of the present invention It is possible to blow blowing pure oxygen combustion gas containing high concentration of carbon dioxide (CO ₂ ). Therefore, the high concentration of carbon dioxide (CO ₂ ) of 45 to 50% in the pure oxygen combustion gas according to an embodiment of the present invention and the dust extraction from the bishop scrubber can be contacted and reacted to quickly and effectively neutralize the high pH of the dust collection. There is an advantage.

In addition to the above-described effects, the concrete effects of the present invention will be described together while describing the specific matters for carrying out the invention.

1 is a view showing a conventional bishop scrubber dust collector.
2 is an overall schematic diagram of a neutralization apparatus for a bishop scrubber dust collector using a pure oxygen combustion apparatus A of blast furnace gas according to an embodiment of the present invention.
FIG. 3 is an enlarged view of a portion of pure oxygen combustion device A in a water collecting neutralization device according to an embodiment of the present invention, among the overall schematic views of FIG. 2.
4 is an enlarged view of a portion from the blast furnace gas line of FIG. 3 to a pure oxygen combustion chamber.
FIG. 5 is an enlarged view of a portion from the combustion air piping and the pure oxygen supply line to the pure oxygen combustion chamber of FIG. 3.
6 is an enlarged view of a portion of the pure oxygen combustion chamber of FIG. 3.
7 is an enlarged view of a rear end portion of the outlet side of the pure oxygen combustion chamber of FIG. 3.
8 is a flowchart schematically showing a method of neutralizing a dust collector according to another embodiment of the present invention.

Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings so that those skilled in the art to which the present invention pertains can easily practice. The present invention can be implemented in many different forms and is not limited to the embodiments described herein.

In order to clearly describe the present invention, parts irrelevant to the description are omitted, and the same reference numerals are assigned to the same or similar elements throughout the specification. In addition, some embodiments of the present invention will be described in detail with reference to exemplary drawings. In adding reference numerals to the components of each drawing, the same components may have the same reference numerals as possible even though they are displayed on different drawings. In addition, in describing the present invention, when it is determined that detailed descriptions of related well-known structures or functions may obscure the subject matter of the present invention, detailed descriptions thereof may be omitted.

In describing the components of the present invention, terms such as first, second, A, B, (a), and (b) may be used. These terms are only for distinguishing the component from other components, and the nature, order, order, or number of the component is not limited by the term. When a component is described as being "connected", "coupled" or "connected" to another component, the component may be directly connected to or connected to the other component, but different components between each component It will be understood that the "intervenes" may be, or each component may be "connected", "coupled" or "connected" through other components.

In addition, in implementing the present invention, components may be subdivided and described for convenience of description, but these components may be implemented in one device or module, or one component may be multiple devices or modules. It can be implemented by being divided into.

1 is a view showing a conventional bishop scrubber dust collector.

As shown in FIG. 1, the dust collecting water discharged from the bishop scrubber 2 which is a wet dust collector of the blast furnace gas 1 is sent to a water treatment facility via the main trap 14 through a degassing tower 12. .

At this time, the degassing tower 12 through which the dust collecting water discharged from the bishop scrubber 2 passes has a vertical structure.

More specifically, the degassing tower 12 flows from the side of the upper side of the vertical structure, and the water flows downward through the source part 13. The combustion exhaust gas of the hot stove 9 is supplied to the lower side of the degassing tower 12 to neutralize the high pH of the dust collection with carbon dioxide (CO ₂ ) in the exhaust gas.

However, the blast furnace 9 is a facility that performs heat storage with the combustion heat of the blast furnace gas 1, and at the same time, supplies excess air to control the temperature of the dome of the hot furnace 9 to protect the facility. However, the concentration of carbon dioxide (CO ₂ ) in the combustion gas is low to 20 to 22% by volume (hereinafter referred to as %) due to nitrogen, which occupies most of the air (79% by volume).

The concentration of the carbon dioxide (CO ₂ ) is very important for neutralizing the dust collected from the bishop scrubber (2). This is because carbon dioxide (CO ₂ ) can neutralize the pH in the dust collector by the following chemical formula.

In more detail, carbon dioxide is dissolved in water (H ₂ O) and converted into carbonic acid (H ₂ CO ₃ ), and hydrogen ions (H ⁺ ) in carbon dioxide are gradually separated into water one by one depending on the pH in water. It is changed to a) and a carbonate ^{_{(CO 3 ²-) - HCO 3}} . At this time, the pH of the collecting water decreases due to increasing hydrogen ions.

Therefore, in the present invention, the concentration of carbon dioxide (CO ₂ ) in the combustion gas flowing into the degassing tower 12 is increased to reduce the pH of the water collection.

To this end, an embodiment of the present invention is characterized in that pure oxygen is used as a supporting gas.

In general, the components of the blast furnace gas 1 are composed of 22 to 24% carbon monoxide (CO), 22 to 24% carbon dioxide (CO ₂ ), 2 to 3% hydrogen (H ₂ ), and 48 to 50% nitrogen. If the blast furnace gas 1 is burned using pure oxygen as a supporting gas, the carbon dioxide (CO ₂ ) content in the burned gas is about 45-50%, and carbon dioxide in the combustion exhaust gas of the conventional hot stove 9 This is because it is higher than the (CO ₂ ) content. As a result, according to an embodiment of the present invention, the pH of the water collecting agent can be further lowered (neutralized) than in the prior art.

In order to lower the pH of the dust collection by using pure oxygen combustion gas as described above, the water collecting neutralization device and method according to an embodiment of the present invention may be embodied according to the following device and method as a non-limiting and specific example. .

2 is an overall schematic diagram of a neutralization apparatus for a bishop scrubber collector using a pure oxygen combustion apparatus for blast furnace gas according to an embodiment of the present invention.

FIG. 3 is an enlarged view of a portion of pure oxygen combustion device A in a water collecting neutralization device according to an embodiment of the present invention, among the overall schematic views of FIG. 2.

4 is an enlarged view of a portion from the blast furnace gas line 25 of FIG. 3 to the pure oxygen combustion chamber A11.

First, the blast furnace gas lines 25 of FIGS. 3 and 4 are connected to the water rod side A1, and then the blast furnace gas flowmeter AE1, the blast furnace gas flow control valve A2, and the blast furnace gas primary shutoff valve A3 ), and the secondary shutoff valve (A4) is located in turn. A purge nitrogen line and a nitrogen valve (A3a) are located between the primary shut-off valve (A3) and the secondary shut-off valve (A4), and the end of the blast furnace gas line (25) is a pure oxygen combustion chamber (A11) burner. Connected.

FIG. 5 is an enlarged view of a portion from the combustion air pipe A7 and the pure oxygen supply line to the pure oxygen combustion chamber A11 in FIG. 3.

3 and 5, the combustion air piping (A7) comprises an air supply flow meter (AE2), an air flow control valve (A6), and an air shutoff valve (A5) in turn, the end of which is in the pure oxygen combustion chamber (A11). It is connected to the air supply side located at the bottom of the burner.

Meanwhile, the pure oxygen supply line sequentially includes a pure oxygen supply flow meter (AE3), a pure oxygen flow control valve (A10), a pure oxygen primary shutoff valve (A9), and a pure oxygen secondary shutoff valve (A8). It is connected immediately before the combustion air pipe (A7) and the pure oxygen combustion chamber (A11).

6 is an enlarged view of a portion of the pure oxygen combustion chamber A11 of FIG. 3.

3 and 6, the pure oxygen combustion chamber A11 includes a heat exchanger A12 inside the upper side of the combustion chamber burner to cool the combustion gas, and the combustion heat is recovered by the thermal medium circulation supply line A13. In addition, a dome thermometer (AE4) is installed at the top of the pure oxygen combustion chamber to detect the temperature of the combustion gas after the heat exchanger.

Through the configuration of the pure oxygen combustion chamber A11 as described above, the temperature of the combustion gas after the primary cooling can be monitored in the dome thermometer AE4 above the primary heat exchanger A12 above the burner of the combustion chamber A11.

7 is an enlarged view of the rear end portion of the outlet side of the pure oxygen combustion chamber A11 of FIG. 3.

3 and 7, the outlet pipe and the secondary heat exchanger A14 are located first in the combustion gas discharge line at the outlet of the pure oxygen combustion chamber A11. A heat medium pipe A15 is located inside the secondary heat exchanger A14, and heat may be recovered from the secondary heat exchanger A14 by the heat medium pipe.

A secondary heat exchanger exit gas thermometer (AE5) and a carbon monoxide (CO) concentration meter (AE6) are located in the outlet pipe at the rear end of the combustion chamber, thereby detecting the degree of cooling of the combustion gas and incomplete combustion of the combustion gas. Meanwhile, a cooling flue gas flow meter AE7 is located at the rear end of the carbon monoxide (CO) concentration meter AE6.

Therefore, the temperature of the secondary cooled gas in the secondary heat exchanger (A14) is detected by the outlet gas thermometer (AE5), and the degree of incomplete combustion of the combustion gas is measured by a carbon monoxide (CO) concentration meter (AE6). The amount can be measured with the cooling flue gas flow meter (AE7).

Next, a surplus gas stack discharge line 21' is branched to the rear end line of the flow meter AE7, and the separated stack discharge line 21' has a primary shut-off valve A16 and a secondary before the stack. The shut-off valve 20' is located. Therefore, the surplus of combustion gas can be discharged to the stack through the stack discharge line 21'.

Meanwhile, a cooling combustion gas line is connected to a rear end of the combustion gas flowmeter AE7, and a final cooling chiller A17 and a gas thermometer AE8 are located in the cooling combustion gas line.

Next, a shut-off valve (A18), a compressor (A19) for boosting, an outlet shut-off valve (A20), and a compressor outlet flue gas thermometer (AE9) are located at the rear end of the gas thermometer (AE8).

Meanwhile, a bypass line and a bypass valve A23 are positioned between the compressor A19 and the outlet shutoff valve A20 to enable light load starting of the compressor A19.

After the compressor outlet combustion gas thermometer (AE9) is located in the order of the compressed combustion gas receiver (A21), receiver pressure gauge (AE10) and receiver outlet valve (A22), the receiver bypass line and bypass valve (A23) It is mounted. The rear end of the cooling flue gas line is connected to the flue gas blowing device 19 under the degassing tower 12.

Through the above configuration, the combustion gas is cooled to the operating temperature in the chiller (A17), is boosted to the working pressure through the compressor (A19), and temporarily stored in the receiver (A21) for the compressed combustion gas while being stored in the blowing device (19) is supplied to the degassing tower (A12).

Meanwhile, an upper portion of the degassing tower 12 is equipped with a degassing tower gas vent control valve 19v to maximize residence time of high concentration of carbon dioxide (CO ₂ ) flowing into the degassing tower 12. It can be extended. As a result, it is possible to maximize the neutralization reaction of the bishop scrubber with the carbon dioxide (CO ₂ ).

More specifically, the degassing tower A12 may adjust the amount of vents while balancing with the blowing amount of pure oxygen combustion gas supplied through the control of the gas degassing valve 19v of the degassing tower at the top. . Therefore, the supplied pure oxygen combustion gas can maintain the residence time for a long time inside the degassing tower 12, and as a result, obtains the best neutralization effect of the dust collection.

According to the bishop scrubber dust collector neutralization apparatus according to an embodiment of the present invention as described above, the bishop scrubber dust collector according to an embodiment of the present invention to the blowing device 19 connected to the lower side of the degassing tower 12 It is possible to blow blowing pure oxygen combustion gas containing 45 to 50% of high concentration carbon dioxide (CO ₂ ) generated by the pure oxygen combustion device (A) of the neutralization device. Therefore, the high concentration of carbon dioxide (CO ₂ ) in contact with and reacting with the high concentration of carbon dioxide (CO ₂ ) of 45 to 50% in the pure oxygen combustion gas according to an embodiment of the present invention is quickly and effectively collected and collected from the bishop scrubber (2). A neutralizing effect can be obtained.

Hereinafter, a method for neutralizing a bishop scrubber collecting method using pure oxygen combustion gas of blast furnace gas using the neutralizing apparatus according to an embodiment of the present invention will be described with reference to a flow chart showing a method for neutralizing collecting water in FIG. 8.

<Step where blast furnace gas is supplied to a pure oxygen combustion chamber>

First, the blast furnace gas line drawn out from the clean blast furnace gas line 25 is connected to a water sealing valve (A1) having a gas blocking and supply function, and thereafter a blast furnace gas supply flow meter (AE1), a blast furnace gas flow control valve (A2), The blast furnace gas primary shut-off valve (A3) and the secondary shut-off valve (A4) are sequentially installed. And in the section between the primary shut-off valve (A3) and the secondary shut-off valve (A4), a nitrogen line for purge and a nitrogen valve (A3a) are located, and the end of the blast furnace gas line is connected to the burner of the pure oxygen combustion chamber (A11). do. Therefore, the blast furnace gas is supplied to the pure oxygen combustion chamber (A11) along the blast furnace gas line, and the residual gas in the blast furnace gas line at the start and end of combustion of the blast furnace gas is purged by the nitrogen to purify the pure oxygen combustion chamber (A11). Can be completely purged to the side.

<Step of blast furnace gas combustion in a pure oxygen combustion chamber>

For combustion of the blast furnace gas in the pure oxygen combustion chamber, an air pipe (A7), an air supply flow meter (AE2), an air flow control valve (A6), and an air shutoff valve (A5) are sequentially positioned in the combustion air supply line. do. The end of the combustion air supply line is connected to the air supply side of the pure oxygen combustion chamber (A11) burner.

Meanwhile, the pure oxygen supply line sequentially includes a pure oxygen supply flow meter (AE3), a pure oxygen flow control valve (A10), a pure oxygen primary shut-off valve (A9), and a pure oxygen secondary shut-off valve (A8). The end of the pure oxygen supply line is connected to the air supply line for combustion just before the burner inlet of the pure oxygen combustion chamber A11.

Therefore, the blast furnace gas starts safe combustion by air supplied from the air supply line for combustion at the beginning of combustion, and when pure oxygen is introduced thereafter, the supply of air is gradually reduced, and finally the blast furnace gas is pure oxygen. Combustion takes place in an atmosphere of 100%.

<Step of recovering combustion heat of blast furnace gas>

The pure oxygen combustion chamber (A11), which is the pure oxygen combustion apparatus, includes a burner, and a heat exchanger (A12) is located in the upper middle portion of the burner to cool the combustion gas in which the blast furnace gas is burned.

At this time, the heat medium circulation line A13 for the heat exchanger recovers the combustion heat of the combustion gas.

In addition, a dome temperature detector AE4 is installed on the upper portion of the pure oxygen combustion chamber A11 to detect the temperature of the combustion gas from which combustion heat is recovered by the heat exchanger A12.

Furthermore, the combustion gas in which the combustion heat is first recovered may be heat-recovered in the secondary heat by the secondary heat exchanger (A14) and the heat medium pipe (A15) located after the outlet pipe of the pure oxygen combustion chamber (A11).

On the other hand, at the rear end of the secondary heat exchanger (A14), a secondary heat exchanger outlet flue gas thermometer (AE5) and a secondary heat exchanger outlet flue gas carbon monoxide concentration meter (AE6) are sequentially positioned, leaving the secondary heat exchanger (A14). It detects the degree of cooling of the combustion gas and incomplete combustion.

Meanwhile, the combustion gas cooled by the secondary heat exchanger (A14) passes through the carbon monoxide concentration meter (AE6) and then passes through the secondary heat exchanger outlet combustion gas flow meter (AE7). The surplus combustion gas is discharged to the stack 10 of surplus combustion gas after passing through the surplus combustion gas stack discharge line 21' and the secondary shut-off valve 20' before the stack, which are branched in the subsequent line.

<Combustion gas cooling stage>

The cooled combustion gas passes through a cooling combustion gas line located at a rear end of the secondary heat exchanger outlet combustion gas flow meter (AE7). The cooling flue gas line includes a chiller for cooling (A17), a gas thermometer (AE8), a shut-off valve at the compressor inlet (A18), a compressor (A19), a compressor outlet shut-off valve (A20), and a compressor outlet flue gas thermometer (AE9). Are located in turn. In addition, a receiver (A21), a receiver pressure gauge (AE10) and a receiver outlet valve (A22) for compressed combustion gas are sequentially located at the rear end of the compressor outlet combustion gas thermometer (AE9), and the compressor outlet combustion gas thermometer (AE9) and compressed combustion Between the gas receiver A21, a receiver bypass line and a bypass valve A23 are located.

Accordingly, the cooled combustion gas passes through the cooling combustion gas line and is cooled by the cooling chiller A17 and then boosted to a predetermined pressure by the compressor A19.

<Step of supplying combustion gas to the degassing tower>

The rear end line of the receiver outlet valve A22 and the bypass valve A23 located at the rear end of the cooling flue gas line are connected to the combustion gas blowing device 19 under the degassing tower 12.

Therefore, the cooled combustion gas is blown under the degassing tower 12 by the combustion gas blowing device 19.

The cooled combustion gas supplied into the degassing tower 12 has a residence time in the degassing tower 12 maximized by a vent amount control valve 19v positioned above the degassing tower 12. Accordingly, the collection time of the bishop scrubber maximizes the reaction time with the cooled combustion gas, and as a result, a neutralization reaction between the collection number and carbon dioxide (CO ₂ ) in the cooled combustion gas can be maximized.

As described above, the present invention has been described with reference to the exemplified drawings, but the present invention is not limited by the examples and drawings disclosed in the present specification, and it is various by a person skilled in the art within the scope of the technical idea of the present invention. It is obvious that modifications can be made. In addition, although the operation and effect according to the configuration of the present invention is not explicitly described while describing the embodiments of the present invention, it is natural that the predictable effect by the configuration should also be recognized.

1: blast furnace gas (BFG; blast furnace gas)
2; Bischoff Scrubber
3; Demister
4; TRT (Top Gas Pressure Recovery Turbine)
5; BCV (By Pass Control Valve)
6; BV (By Pass Valve)
7; Gas Holder
8; Hot Wind Road Trip Subongbyeon
9; Fever
10; Stack
11; Bishop water collection line
12; Degassing tower
13; Degassing Tower Internal Emission Collection Monthly
14; Main Trough
E1; Peha (pH) meter
15; Thickener sedimentation tank
16; Bischoff Settling Tank
17; Bishop pump
18; Bishop House Supply Supply Pipe
19; Degassing Tower內 Oxygen-loaded combustion gas supply device
19v; Degassing Tower Vent Volume Control Valve
20'; Blast Furnace Oxygen Load Combustion Surplus Gas Secondary Shut-off Valve
21'; Blast Furnace Oxygen Load Combustion Gas Exhaust Line
25: Clean blast furnace gas (BFG) line
A; Blast furnace (BFG) pure oxygen combustion device
A1; Blast Furnace Block
A2; Blast furnace gas flow control valve
A3; Blast furnace gas supply primary valve
A3a; Nitrogen purge valve
A4; Blast furnace gas supply secondary valve
A5; Combustion Air Shut-off Valve
A6; Combustion Air Flow Control Valve
A7; Combustion Air Line
A8; Oxygen shutoff secondary valve
A9; Oxygen shutoff primary valve
A10; Oxygen flow control valve
A11; Blast furnace (BFG) combustion chamber
A12; Primary heat exchanger
A13; Heat medium circulation line
A14; Secondary heat exchanger
A15; Second heat exchanger heat medium circulation line
A16; Load combustion surplus gas stack discharge primary valve
A17; Chiller
A18; Shut-off valve (compressor inlet)
A19; compressor
A20; Shut-off valve (compressor outlet)
A21; Receiver
A22; Shut-off valve (receiver outlet)
A23; Receiver bypass valve
A24; Cooling combustion gas supply line
AE1; Clean blast furnace gas (.BFG) supply flow meter
AE2; Combustion air supply flow meter
AE3; Oxygen supply flow meter
AE4; Pure Oxygen Combustion Room Dome Thermometer
AE5; Secondary heat exchanger outlet flue gas thermometer
AE6; Secondary heat exchanger outlet combustion gas CO concentration meter
AE7; Secondary heat exchanger outlet flue gas flow meter
AE8; Chiller outlet flue gas thermometer
AE9; Compressor outlet flue gas thermometer
AE10; Receiver pressure gauge
AE11; Cooling flue gas supply flow meter

Claims (14)

A pure oxygen combustion chamber for burning blast furnace gas;
A blast furnace gas line connected to one side of the pure oxygen combustion chamber and drawn out of a clean blast furnace gas line;
A combustion air supply line that supplies combustion air to the pure oxygen heat chamber, and is connected to another side of the pure oxygen combustion chamber;
A pure oxygen supply line that supplies pure oxygen for combustion to the pure oxygen combustion chamber, and is connected to the combustion air supply line at the other side of the pure oxygen combustion chamber;
A combustion gas discharge line that discharges blast furnace gas burned in the pure oxygen combustion chamber and is connected to an outlet side of the pure oxygen combustion chamber;
A cooling combustion gas line connected to a rear end of the combustion gas discharge line to cool the combustion gas;
A combustion gas blowing device connected to a rear end of the cooling combustion gas line;
Dust collector neutralizing device comprising a.
According to claim 1,
A purge nitrogen line interconnected to the blast furnace gas line at the one inlet side of the pure oxygen combustion chamber;
Dust collector neutralizing device comprising a.
According to claim 1,
The pure oxygen combustion chamber includes a heat exchanger for recovering combustion heat in the combustion gas in which the blast furnace gas is burned;
A heat medium pipe connected to the heat exchanger; And
Located at the top and a temperature detector for temperature measurement;
Dust collector neutralizing device comprising a.
According to claim 1,
The combustion gas discharge line includes a secondary heat exchanger and a heat medium pipe for additionally recovering combustion heat in the combustion gas;
Dust collector neutralizing device comprising a.
The method of claim 4,
The combustion gas discharge line is located at the outlet side of the secondary heat exchanger, a combustion gas thermometer for measuring the temperature of the combustion gas, and a combustion gas carbon monoxide concentration meter for detecting incomplete combustion of the combustion gas; And
A stack discharge line branched from the combustion gas discharge line for discharging surplus of combustion gas;
Dust collector neutralizing device comprising a.
According to claim 1,
The cooling combustion gas line includes a cooling water chiller for cooling the combustion gas, a compressor for compressing the combustion gas, and a receiver for compressed combustion gas;
Dust collector neutralizing device comprising a.
According to claim 1,
The degassing tower has a vent amount control valve on the upper inside;
Dust collector neutralizing device comprising a.
Blast furnace gas is supplied to the pure oxygen combustion chamber;
The blast furnace gas being burned in the combustion chamber;
Recovering the heat of combustion of the blast furnace gas;
Cooling the combustion gas in which the blast furnace gas is burned;
Supplying the combustion gas to a degassing tower;
A method of neutralizing a dust collector comprising a.
The method of claim 8,
Nitrogen purging the blast furnace gas before the blast furnace gas is burned in the combustion chamber;
A method of neutralizing a dust collector comprising a.
The method of claim 8,
The step in which the blast furnace gas is burned in the combustion chamber is burned in an air atmosphere at the beginning of combustion and burned in a pure oxygen atmosphere at a later combustion step;
The method of neutralizing the water collecting, characterized in that.
The method of claim 8,
The step of recovering the combustion heat of the blast furnace gas may include firstly recovering combustion heat in the combustion chamber and secondly recovering combustion heat outside the combustion chamber;
A method of neutralizing a dust collector comprising a.
The method of claim 8,
Discharging the surplus of combustion gas before the step of cooling the combustion gas in which the blast furnace gas is burned.
A method of neutralizing a dust collector comprising a.
The method of claim 8,
Boosting the combustion gas after the step of cooling the combustion gas from which the blast furnace gas has been burned;
A method of neutralizing a dust collector comprising a.
The method of claim 8,
Adjusting the amount of combustion gas vents in the degassing tower after the combustion gas is supplied to the degassing tower;
A method of neutralizing a dust collector comprising a.

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