CN114276841A - Desulfurization method of blast furnace gas - Google Patents
Desulfurization method of blast furnace gas Download PDFInfo
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- CN114276841A CN114276841A CN202111642993.9A CN202111642993A CN114276841A CN 114276841 A CN114276841 A CN 114276841A CN 202111642993 A CN202111642993 A CN 202111642993A CN 114276841 A CN114276841 A CN 114276841A
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- blast furnace
- aqueous solution
- furnace gas
- desulfurizing
- tower
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- 238000006477 desulfuration reaction Methods 0.000 title claims abstract description 29
- 230000023556 desulfurization Effects 0.000 title claims abstract description 29
- 238000000034 method Methods 0.000 title claims abstract description 23
- 239000007864 aqueous solution Substances 0.000 claims abstract description 46
- 230000003009 desulfurizing effect Effects 0.000 claims abstract description 34
- 229910052717 sulfur Inorganic materials 0.000 claims abstract description 15
- 239000011593 sulfur Substances 0.000 claims abstract description 15
- NINIDFKCEFEMDL-UHFFFAOYSA-N Sulfur Chemical compound [S] NINIDFKCEFEMDL-UHFFFAOYSA-N 0.000 claims abstract description 13
- UCKMPCXJQFINFW-UHFFFAOYSA-N Sulphide Chemical compound [S-2] UCKMPCXJQFINFW-UHFFFAOYSA-N 0.000 claims abstract description 12
- 150000001875 compounds Chemical class 0.000 claims abstract description 11
- 230000008929 regeneration Effects 0.000 claims abstract description 11
- 238000011069 regeneration method Methods 0.000 claims abstract description 11
- 239000000243 solution Substances 0.000 claims abstract description 8
- 238000006243 chemical reaction Methods 0.000 claims abstract description 6
- 229910000000 metal hydroxide Inorganic materials 0.000 claims abstract description 5
- 150000004692 metal hydroxides Chemical class 0.000 claims abstract description 5
- 229910044991 metal oxide Inorganic materials 0.000 claims abstract description 5
- 150000004706 metal oxides Chemical class 0.000 claims abstract description 5
- 239000007921 spray Substances 0.000 claims abstract description 5
- 238000003825 pressing Methods 0.000 claims abstract description 3
- 238000004064 recycling Methods 0.000 claims abstract description 3
- 239000007789 gas Substances 0.000 claims description 53
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 claims description 24
- HEMHJVSKTPXQMS-UHFFFAOYSA-M Sodium hydroxide Chemical compound [OH-].[Na+] HEMHJVSKTPXQMS-UHFFFAOYSA-M 0.000 claims description 24
- 238000001816 cooling Methods 0.000 claims description 18
- 238000000889 atomisation Methods 0.000 claims description 15
- CDBYLPFSWZWCQE-UHFFFAOYSA-L Sodium Carbonate Chemical group [Na+].[Na+].[O-]C([O-])=O CDBYLPFSWZWCQE-UHFFFAOYSA-L 0.000 claims description 12
- FAPWRFPIFSIZLT-UHFFFAOYSA-M Sodium chloride Chemical group [Na+].[Cl-] FAPWRFPIFSIZLT-UHFFFAOYSA-M 0.000 claims description 12
- 239000000110 cooling liquid Substances 0.000 claims description 12
- 229910052757 nitrogen Inorganic materials 0.000 claims description 12
- 238000005507 spraying Methods 0.000 claims description 9
- VTYYLEPIZMXCLO-UHFFFAOYSA-L Calcium carbonate Chemical group [Ca+2].[O-]C([O-])=O VTYYLEPIZMXCLO-UHFFFAOYSA-L 0.000 claims description 8
- BVKZGUZCCUSVTD-UHFFFAOYSA-L Carbonate Chemical compound [O-]C([O-])=O BVKZGUZCCUSVTD-UHFFFAOYSA-L 0.000 claims description 8
- 239000007788 liquid Substances 0.000 claims description 6
- 229910000029 sodium carbonate Inorganic materials 0.000 claims description 6
- 239000011780 sodium chloride Substances 0.000 claims description 6
- 229910052979 sodium sulfide Inorganic materials 0.000 claims description 6
- GRVFOGOEDUUMBP-UHFFFAOYSA-N sodium sulfide (anhydrous) Chemical group [Na+].[Na+].[S-2] GRVFOGOEDUUMBP-UHFFFAOYSA-N 0.000 claims description 6
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 6
- VEXZGXHMUGYJMC-UHFFFAOYSA-M Chloride anion Chemical compound [Cl-] VEXZGXHMUGYJMC-UHFFFAOYSA-M 0.000 claims description 4
- 229910000019 calcium carbonate Inorganic materials 0.000 claims description 4
- JGIATAMCQXIDNZ-UHFFFAOYSA-N calcium sulfide Chemical group [Ca]=S JGIATAMCQXIDNZ-UHFFFAOYSA-N 0.000 claims description 4
- 238000002347 injection Methods 0.000 claims description 4
- 239000007924 injection Substances 0.000 claims description 4
- AXCZMVOFGPJBDE-UHFFFAOYSA-L calcium dihydroxide Chemical group [OH-].[OH-].[Ca+2] AXCZMVOFGPJBDE-UHFFFAOYSA-L 0.000 claims description 3
- BRPQOXSCLDDYGP-UHFFFAOYSA-N calcium oxide Chemical group [O-2].[Ca+2] BRPQOXSCLDDYGP-UHFFFAOYSA-N 0.000 claims description 3
- 239000000292 calcium oxide Substances 0.000 claims description 3
- ODINCKMPIJJUCX-UHFFFAOYSA-N calcium oxide Inorganic materials [Ca]=O ODINCKMPIJJUCX-UHFFFAOYSA-N 0.000 claims description 3
- BWGNESOTFCXPMA-UHFFFAOYSA-N Dihydrogen disulfide Chemical compound SS BWGNESOTFCXPMA-UHFFFAOYSA-N 0.000 claims description 2
- 239000000920 calcium hydroxide Substances 0.000 claims description 2
- 229910001861 calcium hydroxide Inorganic materials 0.000 claims description 2
- -1 contains H2S and COS Chemical class 0.000 claims description 2
- 239000003034 coal gas Substances 0.000 abstract description 4
- 230000035484 reaction time Effects 0.000 abstract description 4
- 238000004519 manufacturing process Methods 0.000 description 7
- RWSOTUBLDIXVET-UHFFFAOYSA-N Dihydrogen sulfide Chemical compound S RWSOTUBLDIXVET-UHFFFAOYSA-N 0.000 description 5
- 229910000037 hydrogen sulfide Inorganic materials 0.000 description 5
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 4
- JJWKPURADFRFRB-UHFFFAOYSA-N carbonyl sulfide Chemical compound O=C=S JJWKPURADFRFRB-UHFFFAOYSA-N 0.000 description 4
- 230000000694 effects Effects 0.000 description 4
- UGFAIRIUMAVXCW-UHFFFAOYSA-N Carbon monoxide Chemical compound [O+]#[C-] UGFAIRIUMAVXCW-UHFFFAOYSA-N 0.000 description 2
- 239000000706 filtrate Substances 0.000 description 2
- 239000003546 flue gas Substances 0.000 description 2
- 239000000446 fuel Substances 0.000 description 2
- 238000010438 heat treatment Methods 0.000 description 2
- 229910052742 iron Inorganic materials 0.000 description 2
- 239000000203 mixture Substances 0.000 description 2
- 238000011085 pressure filtration Methods 0.000 description 2
- 238000005086 pumping Methods 0.000 description 2
- 229910000831 Steel Inorganic materials 0.000 description 1
- 239000006227 byproduct Substances 0.000 description 1
- 238000004939 coking Methods 0.000 description 1
- 238000002485 combustion reaction Methods 0.000 description 1
- 238000009776 industrial production Methods 0.000 description 1
- 239000010959 steel Substances 0.000 description 1
- 238000009628 steelmaking Methods 0.000 description 1
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Abstract
The invention discloses a method for desulfurizing blast furnace gas, wherein the blast furnace gas enters a desulfurizing tower after precooling treatment, and a desulfurizing and atomizing nozzle arranged at the top of the desulfurizing tower sprays atomized alkaline aqueous solution to absorb sulfur-containing compounds in the blast furnace gas to obtain recovered aqueous solution; the recovered aqueous solution is regenerated into a regenerated solution in a regeneration tower through metal hydroxide or metal oxide and compressed air introduced from the bottom, and the regenerated solution is subjected to filter pressing to obtain an alkaline aqueous solution for recycling; the invention increases the reaction area and reaction time of the alkaline aqueous solution and the sulfide in the coal gas and improves the desulfurization efficiency.
Description
Technical Field
The invention relates to a desulfurization method of blast furnace gas, belonging to the field of blast furnace gas desulfurization.
Background
The blast furnace gas is a byproduct combustible gas in the blast furnace ironmaking production process, has large output and wide application, and can be used as a fuel for a power plant boiler, an iron-making plant hot blast stove and a steel-making plant heating furnace. The main components of the blast furnace gas are CO and CO2、N2And small amounts of sulfide, Cl-In which the sulfide is predominantly H2S, COS is the main part.
Because blast furnace gas generated in the blast furnace ironmaking process at present is directly used as fuel for power plant boilers, hot blast stoves of iron works and coking production after desulfurization treatment, if desulfurization is carried out, the blast furnace gas is directly used as fuelIncomplete sulfur can cause SO in the flue gas emission of power plant boilers, hot blast stoves of iron works and heating furnaces of steel works2The content can not meet the national ultra-clean emission requirement.
Such as SO in flue gas discharged by part of production units2The content is more than 50mg/m3On one hand, the exhaust emission of the production unit exceeds the standard, and on the other hand, the exhaust emission is caused by the combustion proportion problem in the use process of the production unit and most reasons, and also caused by overhigh sulfur content of the supplied coal gas.
For this purpose, the blast furnace gas needs to be desulfurized before entering the next supply and demand. The quality of the desulfurization effect is directly related to the atomization of the alkaline aqueous solution. The atomizing nozzle has good atomizing effect, increases the reaction area and reaction time of the alkaline aqueous solution and the sulfide in the coal gas, and improves the desulfurization efficiency.
Disclosure of Invention
The technical problem to be solved by the invention is to provide a method for desulfurizing blast furnace gas, which increases the reaction area and reaction time of alkaline aqueous solution and sulfide in the gas and improves the desulfurization efficiency by improving the atomization effect of a desulfurization atomization nozzle.
In order to solve the technical problems, the technical scheme adopted by the invention is as follows:
a method for desulfurizing blast furnace gas mainly containing CO and CO2、N2And a small amount of a sulfur-containing compound, Cl-Wherein the sulfur-containing compound mainly contains H2S and COS, comprising the following steps:
s1, pre-cooling: blast furnace gas is compressed by a blower and enters a pre-cooling tower to be in direct contact with circulating cooling liquid sprayed on the top of the tower reversely for cooling;
s2, desulfurizing in a desulfurizing tower: the precooled blast furnace gas enters a desulfurizing tower, and a desulfurizing and atomizing nozzle arranged at the top of the desulfurizing tower sprays and atomizes an alkaline aqueous solution to absorb sulfur-containing compounds in the blast furnace gas to generate an aqueous solution which is dissolved in water and contains a first sulfide, a first carbonate and a chloride, and is called a recovered aqueous solution for short;
s3, reduction by a regeneration tower: the recovered aqueous solution flows out of the bottom of the desulfurization tower, enters a reaction tank through a liquid seal tank, then is sent into a regeneration tower through a desulfurization pump, and enters a regeneration tank with metal hydroxide or metal oxide arranged inside, so that the recovered aqueous solution is regenerated into a regenerated solution in the tower, and the regenerated solution comprises an alkaline aqueous solution, a second disulfide and a second carbonate;
s4, treatment of the regeneration liquid: and carrying out filter pressing on the regenerated solution to obtain an alkaline aqueous solution for recycling.
The technical scheme of the invention is further improved as follows: in the step S1, the temperature of the blast furnace gas after pre-cooling treatment is 25 ℃, the circulating cooling liquid is pumped from the bottom to a cooler by a pump, cooled to 23 ℃ by low-temperature water and then enters the top of the pre-cooling tower for circulating spraying.
The technical scheme of the invention is further improved as follows: the alkaline aqueous solution is 8-12% sodium hydroxide aqueous solution.
The technical scheme of the invention is further improved as follows: the metal hydroxide is calcium hydroxide, and the metal oxide is calcium oxide.
The technical scheme of the invention is further improved as follows: the first sulfide is sodium sulfide, the first carbonate is sodium carbonate, and the chloride is sodium chloride.
The technical scheme of the invention is further improved as follows: the second sulfide is calcium sulfide and the second carbonate is calcium carbonate.
The technical scheme of the invention is further improved as follows: the desulfurization atomization spray head comprises an ejector and a T-shaped ejector suction pipe which is arranged in the ejector and arranged in a T shape and comprises a coarse ejection flow channel and a fine ejection flow channel, the fine ejection flow channel of the T-shaped ejector suction pipe penetrates through the ejector and is connected with a nozzle, a high-pressure channel which is communicated with the fine ejection flow channel and has the same diameter is arranged in the nozzle, and the diameter of one end, close to the end part of the nozzle, of the high-pressure channel is gradually increased and is the same as the end part of the nozzle; and the coarse jet flow channel of the T-shaped injection and suction pipe is respectively communicated with the alkaline aqueous solution channel and the high-pressure nitrogen channel.
The technical scheme of the invention is further improved as follows: the volume of the desulfurization atomization nozzle for spraying and atomizing the alkaline aqueous solution is adjusted by adjusting the opening size of the nozzle and the flow of the high-pressure nitrogen.
Due to the adoption of the technical scheme, the invention has the technical progress that:
the invention increases the reaction area and reaction time of the alkaline aqueous solution and the sulfide in the coal gas and improves the desulfurization efficiency by improving the atomization effect of the desulfurization atomization nozzle.
The invention can regenerate and recycle the alkaline aqueous solution, has simple process, is economic and environment-friendly, and is suitable for the desulfurization of blast furnace gas in various industrial productions.
Drawings
FIG. 1 is a schematic structural view of a desulfurization atomizing nozzle in accordance with the present invention;
the device comprises an alkaline aqueous solution channel, a high-pressure nitrogen channel, a jetting and sucking device, a T-shaped jetting and sucking pipe, a high-pressure channel, a nozzle and a nozzle, wherein the alkaline aqueous solution channel is 1, the high-pressure nitrogen channel is 2, the jetting and sucking device is 3, the T-shaped jetting and sucking pipe is 4, and the high-pressure channel is 5.
Detailed Description
The present invention will be described in further detail with reference to the following examples:
wherein the main components of the blast furnace gas are CO and CO2、N2And a small amount of a sulfur-containing compound, Cl-Wherein the sulfur-containing compound mainly contains H2S and COS.
Example 1
A method for desulfurizing blast furnace gas specifically comprises the following steps:
and S1, compressing the blast furnace gas by a blower, feeding the blast furnace gas into a pre-cooling tower, cooling the blast furnace gas to 25 ℃ in a reverse direction by directly contacting with circulating cooling liquid sprayed on the top of the tower, pumping the circulating cooling liquid from the bottom by a pump, sending the circulating cooling liquid to a cooler, cooling the circulating cooling liquid to 23 ℃ by low-temperature water, and feeding the cooled blast furnace gas into the top of the pre-cooling tower for circulating spraying.
S2, feeding the precooled blast furnace gas into a desulfurizing tower, spraying a sodium hydroxide aqueous solution with the mass concentration of 8% from top to bottom through a desulfurizing atomization nozzle, and simultaneously feeding 100mg/m of sulfur carbonyl and hydrogen sulfide into the desulfurizing tower from the lower part3The spraying speed and the gas flow rate can be adjusted in time according to production requirements, and the total time of the blast furnace gas after desulfurization is more than 1 second; the temperature of the blast furnace gas inlet is 60-180 degrees.
And S3, the absorbed purified gas is discharged from the upper end of the desulfurizing tower, dried and then enters the next process, the sodium hydroxide aqueous solution is converted into sodium sulfide, sodium chloride and sodium carbonate, the sodium sulfide, the sodium chloride and the sodium carbonate flow into a regeneration tank filled with excessive saturated calcium hydroxide solution along with the liquid, the mixture is stirred and kept stand for 20min, then pressure filtration is carried out, calcium sulfide and calcium carbonate are filtered, and the filtrate is the sodium hydroxide aqueous solution and is recycled.
After the treatment by the method for removing carbonyl sulfide in blast furnace gas, the content of sulfur-containing compounds in the purified blast furnace gas is reduced to 5mg/m3The following.
The desulfurization atomization nozzle is shown in fig. 1, and comprises an ejector 3 and a T-shaped ejector pipe 4 which is arranged in the ejector 3 in a T-shaped manner and comprises a coarse ejection flow channel and a fine ejection flow channel, wherein the fine ejection flow channel of the T-shaped ejector pipe 4 penetrates through the ejector 3 and is connected with a nozzle 6, a high-pressure channel 5 which is communicated with the fine ejection flow channel and has the same diameter is arranged in the nozzle 6, and the diameter of one end, close to the end of the nozzle 6, of the high-pressure channel 5 is gradually increased and is the same as the end of the nozzle; the rough jet flow channel of the T-shaped injection and suction pipe 4 is respectively communicated with the alkaline aqueous solution channel 1 and the high-pressure nitrogen channel 2, the alkaline aqueous solution channel 1 is arranged above and enters from the top of the rough jet flow channel, and the high-pressure nitrogen channel 2 directly enters the rough jet flow channel.
Wherein, the volume of the alkaline aqueous solution sprayed and atomized by the desulfurization atomization nozzle is adjusted by adjusting the opening size of the nozzle 6 and the flow of the high-pressure nitrogen.
Example 2
A method for desulfurizing blast furnace gas specifically comprises the following steps:
and S1, compressing the blast furnace gas by a blower, feeding the blast furnace gas into a pre-cooling tower, cooling the blast furnace gas to 25 ℃ in a reverse direction by directly contacting with circulating cooling liquid sprayed on the top of the tower, pumping the circulating cooling liquid from the bottom by a pump, sending the circulating cooling liquid to a cooler, cooling the circulating cooling liquid to 23 ℃ by low-temperature water, and feeding the cooled blast furnace gas into the top of the pre-cooling tower for circulating spraying.
S2, feeding the precooled blast furnace gas into a desulfurizing tower, spraying a sodium hydroxide aqueous solution with the mass concentration of 12% from top to bottom through a desulfurizing atomization nozzle, and simultaneously feeding 100mg/m of sulfur carbonyl and hydrogen sulfide into the desulfurizing tower from the lower part3The spraying speed and the gas flow rate can be adjusted in time according to production requirements, and the total time of the blast furnace gas after desulfurization is more than 1 second; inlet temperature of blast furnace gasThe degree is between 60 and 180 degrees.
And S3, the absorbed purified gas is discharged from the upper end of the desulfurizing tower, dried and then enters the next process, the sodium hydroxide aqueous solution is converted into sodium sulfide, sodium chloride and sodium carbonate, the sodium sulfide, the sodium chloride and the sodium carbonate flow into a regeneration tank filled with calcium oxide along with the liquid, the mixture is stirred and kept stand for 20min, then pressure filtration is carried out, the calcium sulfide and the calcium carbonate are filtered, and the filtrate is the sodium hydroxide aqueous solution and is recycled.
After the treatment by the method for removing carbonyl sulfide in blast furnace gas, the content of sulfur-containing compounds in the purified blast furnace gas is reduced to 5mg/m3The following.
The desulfurization atomization nozzle is shown in fig. 1, and comprises an ejector 3 and a T-shaped ejector pipe 4 which is arranged in the ejector 3 in a T-shaped manner and comprises a coarse ejection flow channel and a fine ejection flow channel, wherein the fine ejection flow channel of the T-shaped ejector pipe 4 penetrates through the ejector 3 and is connected with a nozzle 6, a high-pressure channel 5 which is communicated with the fine ejection flow channel and has the same diameter is arranged in the nozzle 6, and the diameter of one end, close to the end of the nozzle 6, of the high-pressure channel 5 is gradually increased and is the same as the end of the nozzle; the rough jet flow channel of the T-shaped injection and suction pipe 4 is respectively communicated with the alkaline aqueous solution channel 1 and the high-pressure nitrogen channel 2, the alkaline aqueous solution channel 1 is arranged above and enters from the top of the rough jet flow channel, and the high-pressure nitrogen channel 2 directly enters the rough jet flow channel.
Wherein, the volume of the alkaline aqueous solution sprayed and atomized by the desulfurization atomization nozzle is adjusted by adjusting the opening size of the nozzle 6 and the flow of the high-pressure nitrogen.
Claims (8)
1. A method for desulfurizing blast furnace gas mainly containing CO and CO2、N2And a small amount of a sulfur-containing compound, Cl-Wherein the sulfur-containing compound mainly contains H2S and COS, characterized by comprising the following steps:
s1, pre-cooling: blast furnace gas is compressed by a blower and enters a pre-cooling tower to be in direct contact with circulating cooling liquid sprayed on the top of the tower reversely for cooling;
s2, desulfurizing in a desulfurizing tower: the precooled blast furnace gas enters a desulfurizing tower, and a desulfurizing and atomizing nozzle arranged at the top of the desulfurizing tower sprays and atomizes an alkaline aqueous solution to absorb sulfur-containing compounds in the blast furnace gas to generate an aqueous solution which is dissolved in water and contains a first sulfide, a first carbonate and a chloride, and is called a recovered aqueous solution for short;
s3, reduction by a regeneration tower: the recovered aqueous solution flows out of the bottom of the desulfurization tower, enters a reaction tank through a liquid seal tank, then is sent into a regeneration tower through a desulfurization pump, and enters a regeneration tank with metal hydroxide or metal oxide arranged inside, so that the recovered aqueous solution is regenerated into a regenerated solution in the tower, and the regenerated solution comprises an alkaline aqueous solution, a second disulfide and a second carbonate;
s4, treatment of the regeneration liquid: and carrying out filter pressing on the regenerated solution to obtain an alkaline aqueous solution for recycling.
2. The method for desulfurizing blast furnace gas according to claim 1, wherein: in the step S1, the temperature of the blast furnace gas after pre-cooling treatment is 25 ℃, the circulating cooling liquid is pumped from the bottom to a cooler by a pump, cooled to 23 ℃ by low-temperature water and then enters the top of the pre-cooling tower for circulating spraying.
3. The method for desulfurizing blast furnace gas according to claim 1, wherein: the alkaline aqueous solution is 8-12% sodium hydroxide aqueous solution.
4. The method for desulfurizing blast furnace gas according to claim 1, wherein: the metal hydroxide is calcium hydroxide, and the metal oxide is calcium oxide.
5. The method for desulfurizing blast furnace gas according to claim 1, wherein: the first sulfide is sodium sulfide, the first carbonate is sodium carbonate, and the chloride is sodium chloride.
6. The method for desulfurizing blast furnace gas according to claim 1, wherein: the second sulfide is calcium sulfide and the second carbonate is calcium carbonate.
7. The method for desulfurizing blast furnace gas according to claim 1, wherein: the desulfurization atomization spray head comprises an ejector (3) and a T-shaped ejector suction pipe (4) which is arranged inside the ejector (3) in a T shape and comprises a coarse ejection flow channel and a fine ejection flow channel, the fine ejection flow channel of the T-shaped ejector suction pipe (4) penetrates through the ejector (3) to be connected with a nozzle (6), a high-pressure channel (5) which is communicated with the fine ejection flow channel and has the same diameter is arranged inside the nozzle (6), and the diameter of one end, close to the end of the nozzle (6), of the high-pressure channel (5) is gradually increased to be the same as the end of the nozzle; and the coarse jet flow channel of the T-shaped injection and suction pipe (4) is respectively communicated with the alkaline aqueous solution channel (1) and the high-pressure nitrogen channel (2).
8. The method for desulfurizing blast furnace gas according to claim 7, wherein: the volume of the alkaline aqueous solution sprayed and atomized by the desulfurization atomization nozzle is adjusted by adjusting the opening size of the nozzle (6) and the flow of the high-pressure nitrogen.
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| CN202111642993.9A CN114276841B (en) | 2021-12-30 | 2021-12-30 | Desulfurization method for blast furnace gas |
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| CN114276841A true CN114276841A (en) | 2022-04-05 |
| CN114276841B CN114276841B (en) | 2023-10-24 |
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2021
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| JP2007008992A (en) * | 2005-06-28 | 2007-01-18 | Nippon Steel Engineering Co Ltd | Apparatus and method for desulfurizing coke oven gas |
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