CN114644947A - Blast furnace gas desulfurization device and method - Google Patents
Blast furnace gas desulfurization device and method Download PDFInfo
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- CN114644947A CN114644947A CN202210346635.1A CN202210346635A CN114644947A CN 114644947 A CN114644947 A CN 114644947A CN 202210346635 A CN202210346635 A CN 202210346635A CN 114644947 A CN114644947 A CN 114644947A
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- 238000006477 desulfuration reaction Methods 0.000 title claims abstract description 75
- 230000023556 desulfurization Effects 0.000 title claims abstract description 75
- 238000000034 method Methods 0.000 title claims abstract description 15
- 239000003513 alkali Substances 0.000 claims abstract description 62
- 238000001816 cooling Methods 0.000 claims abstract description 60
- 239000000428 dust Substances 0.000 claims abstract description 39
- 230000007062 hydrolysis Effects 0.000 claims abstract description 33
- 238000006460 hydrolysis reaction Methods 0.000 claims abstract description 33
- 238000007599 discharging Methods 0.000 claims abstract description 18
- 238000006555 catalytic reaction Methods 0.000 claims abstract description 6
- HEMHJVSKTPXQMS-UHFFFAOYSA-M sodium hydroxide Inorganic materials [OH-].[Na+] HEMHJVSKTPXQMS-UHFFFAOYSA-M 0.000 claims description 48
- 230000003197 catalytic effect Effects 0.000 claims description 14
- 239000000243 solution Substances 0.000 claims description 12
- 239000003054 catalyst Substances 0.000 claims description 10
- 230000003009 desulfurizing effect Effects 0.000 claims description 10
- 238000012806 monitoring device Methods 0.000 claims description 10
- NINIDFKCEFEMDL-UHFFFAOYSA-N Sulfur Chemical compound [S] NINIDFKCEFEMDL-UHFFFAOYSA-N 0.000 claims description 9
- 239000007795 chemical reaction product Substances 0.000 claims description 9
- 229910052717 sulfur Inorganic materials 0.000 claims description 9
- 239000011593 sulfur Substances 0.000 claims description 9
- 238000001914 filtration Methods 0.000 claims description 6
- 238000003756 stirring Methods 0.000 claims description 6
- PNEYBMLMFCGWSK-UHFFFAOYSA-N aluminium oxide Inorganic materials [O-2].[O-2].[O-2].[Al+3].[Al+3] PNEYBMLMFCGWSK-UHFFFAOYSA-N 0.000 claims description 3
- 239000007864 aqueous solution Substances 0.000 claims description 3
- 238000006243 chemical reaction Methods 0.000 claims description 3
- 238000004140 cleaning Methods 0.000 claims description 3
- 229910052593 corundum Inorganic materials 0.000 claims description 3
- 230000000694 effects Effects 0.000 claims description 3
- 239000003595 mist Substances 0.000 claims description 3
- 239000000779 smoke Substances 0.000 claims description 3
- 238000005507 spraying Methods 0.000 claims description 3
- 239000013589 supplement Substances 0.000 claims description 3
- 239000002699 waste material Substances 0.000 claims description 3
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 3
- 229910001845 yogo sapphire Inorganic materials 0.000 claims description 3
- 238000004891 communication Methods 0.000 claims 1
- 238000011002 quantification Methods 0.000 claims 1
- 230000000149 penetrating effect Effects 0.000 abstract 4
- 239000007789 gas Substances 0.000 description 57
- 238000005303 weighing Methods 0.000 description 4
- CURLTUGMZLYLDI-UHFFFAOYSA-N Carbon dioxide Chemical compound O=C=O CURLTUGMZLYLDI-UHFFFAOYSA-N 0.000 description 2
- UGFAIRIUMAVXCW-UHFFFAOYSA-N Carbon monoxide Chemical compound [O+]#[C-] UGFAIRIUMAVXCW-UHFFFAOYSA-N 0.000 description 2
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 2
- UQSXHKLRYXJYBZ-UHFFFAOYSA-N Iron oxide Chemical compound [Fe]=O UQSXHKLRYXJYBZ-UHFFFAOYSA-N 0.000 description 2
- 229910000805 Pig iron Inorganic materials 0.000 description 2
- 229910000831 Steel Inorganic materials 0.000 description 2
- RAHZWNYVWXNFOC-UHFFFAOYSA-N Sulphur dioxide Chemical compound O=S=O RAHZWNYVWXNFOC-UHFFFAOYSA-N 0.000 description 2
- 229910002091 carbon monoxide Inorganic materials 0.000 description 2
- 239000000571 coke Substances 0.000 description 2
- 239000010959 steel Substances 0.000 description 2
- 150000003568 thioethers Chemical class 0.000 description 2
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 description 1
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 1
- 239000004215 Carbon black (E152) Substances 0.000 description 1
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 239000006227 byproduct Substances 0.000 description 1
- 239000001569 carbon dioxide Substances 0.000 description 1
- 229910002092 carbon dioxide Inorganic materials 0.000 description 1
- 229910001873 dinitrogen Inorganic materials 0.000 description 1
- 239000000446 fuel Substances 0.000 description 1
- 238000010438 heat treatment Methods 0.000 description 1
- 229930195733 hydrocarbon Natural products 0.000 description 1
- 150000002430 hydrocarbons Chemical class 0.000 description 1
- 229910052739 hydrogen Inorganic materials 0.000 description 1
- 239000001257 hydrogen Substances 0.000 description 1
- 125000004435 hydrogen atom Chemical class [H]* 0.000 description 1
- 229910052742 iron Inorganic materials 0.000 description 1
- 239000000395 magnesium oxide Substances 0.000 description 1
- CPLXHLVBOLITMK-UHFFFAOYSA-N magnesium oxide Inorganic materials [Mg]=O CPLXHLVBOLITMK-UHFFFAOYSA-N 0.000 description 1
- AXZKOIWUVFPNLO-UHFFFAOYSA-N magnesium;oxygen(2-) Chemical compound [O-2].[Mg+2] AXZKOIWUVFPNLO-UHFFFAOYSA-N 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- TWNQGVIAIRXVLR-UHFFFAOYSA-N oxo(oxoalumanyloxy)alumane Chemical compound O=[Al]O[Al]=O TWNQGVIAIRXVLR-UHFFFAOYSA-N 0.000 description 1
- 239000002245 particle Substances 0.000 description 1
- 229910052814 silicon oxide Inorganic materials 0.000 description 1
Images
Classifications
-
- C—CHEMISTRY; METALLURGY
- C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
- C10K—PURIFYING OR MODIFYING THE CHEMICAL COMPOSITION OF COMBUSTIBLE GASES CONTAINING CARBON MONOXIDE
- C10K1/00—Purifying combustible gases containing carbon monoxide
- C10K1/002—Removal of contaminants
- C10K1/003—Removal of contaminants of acid contaminants, e.g. acid gas removal
- C10K1/004—Sulfur containing contaminants, e.g. hydrogen sulfide
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D46/00—Filters or filtering processes specially modified for separating dispersed particles from gases or vapours
- B01D46/02—Particle separators, e.g. dust precipitators, having hollow filters made of flexible material
- B01D46/023—Pockets filters, i.e. multiple bag filters mounted on a common frame
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D46/00—Filters or filtering processes specially modified for separating dispersed particles from gases or vapours
- B01D46/42—Auxiliary equipment or operation thereof
- B01D46/44—Auxiliary equipment or operation thereof controlling filtration
- B01D46/442—Auxiliary equipment or operation thereof controlling filtration by measuring the concentration of particles
-
- C—CHEMISTRY; METALLURGY
- C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
- C10K—PURIFYING OR MODIFYING THE CHEMICAL COMPOSITION OF COMBUSTIBLE GASES CONTAINING CARBON MONOXIDE
- C10K1/00—Purifying combustible gases containing carbon monoxide
- C10K1/02—Dust removal
- C10K1/024—Dust removal by filtration
-
- C—CHEMISTRY; METALLURGY
- C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
- C10K—PURIFYING OR MODIFYING THE CHEMICAL COMPOSITION OF COMBUSTIBLE GASES CONTAINING CARBON MONOXIDE
- C10K1/00—Purifying combustible gases containing carbon monoxide
- C10K1/08—Purifying combustible gases containing carbon monoxide by washing with liquids; Reviving the used wash liquors
- C10K1/10—Purifying combustible gases containing carbon monoxide by washing with liquids; Reviving the used wash liquors with aqueous liquids
- C10K1/12—Purifying combustible gases containing carbon monoxide by washing with liquids; Reviving the used wash liquors with aqueous liquids alkaline-reacting including the revival of the used wash liquors
- C10K1/122—Purifying combustible gases containing carbon monoxide by washing with liquids; Reviving the used wash liquors with aqueous liquids alkaline-reacting including the revival of the used wash liquors containing only carbonates, bicarbonates, hydroxides or oxides of alkali-metals (including Mg)
-
- C—CHEMISTRY; METALLURGY
- C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
- C10K—PURIFYING OR MODIFYING THE CHEMICAL COMPOSITION OF COMBUSTIBLE GASES CONTAINING CARBON MONOXIDE
- C10K1/00—Purifying combustible gases containing carbon monoxide
- C10K1/34—Purifying combustible gases containing carbon monoxide by catalytic conversion of impurities to more readily removable materials
Landscapes
- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Combustion & Propulsion (AREA)
- Chemical Kinetics & Catalysis (AREA)
- General Chemical & Material Sciences (AREA)
- Oil, Petroleum & Natural Gas (AREA)
- Organic Chemistry (AREA)
- Waste-Gas Treatment And Other Accessory Devices For Furnaces (AREA)
- Treating Waste Gases (AREA)
Abstract
The invention relates to the technical field of blast furnace gas desulfurization, and discloses a blast furnace gas desulfurization device and a blast furnace gas desulfurization method. The device comprises a bag-type dust remover, wherein the output end of the bag-type dust remover is fixedly connected with a hydrolysis catalysis tower in a penetrating way, the output end of the hydrolysis catalysis tower is fixedly connected with a desulfurization cooling tower in a penetrating way, the input end of the desulfurization cooling tower is fixedly provided with an alkali liquor feeding device in a penetrating way, and the output end of the desulfurization cooling tower is fixedly provided with an alkali liquor discharging device in a penetrating way.
Description
Technical Field
The invention relates to the technical field of blast furnace gas desulfurization, in particular to a blast furnace gas desulfurization device and a blast furnace gas desulfurization method.
Background
Blast furnace gas is a byproduct combustible gas in the blast furnace ironmaking production process. Its composition is mainly formed from 6-12% of carbon dioxide, 28-33% of carbon monoxide, 1-4% of hydrogen, 55-60% of nitrogen gas, 0.2-0.5% of hydrocarbon and small quantity of sulfur dioxide. Its dust concentration is 10-50 g/cubic meter (standard condition), and its dust-producing quantity is averagely 50kg/t (pig iron) -75kg/t (pig iron). The dust has particle size below 500 μm, and mainly comprises iron, ferrous oxide, aluminum oxide, silicon oxide, magnesium oxide and coke powder. The combustible carbon monoxide-containing gas is a low-calorific-value gas fuel and can be used as a self-use gas for metallurgical enterprises, such as heating hot rolled steel ingots, preheating steel ladles and the like. Can also be supplied for civil use, if coke oven gas is added, the coke oven gas is called as 'mixed gas', thus improving the heat value.
When the blast furnace gas commonly used is used, desulfurization treatment is often needed to be carried out so as to ensure that the blast furnace gas cannot be polluted after being used, and when the common desulfurization equipment is used, dust cannot be effectively removed, sulfides are not completely treated and are discharged, and alkali liquor cannot be timely treated, so that the treatment efficiency is lower. In response to this situation, those skilled in the art have provided a blast furnace gas desulfurization apparatus and method.
Disclosure of Invention
The invention aims to provide a blast furnace gas desulfurization device and a blast furnace gas desulfurization method, which are used for solving the problems that the conventional desulfurization equipment in the background art cannot effectively remove dust, sulfides are discharged without being treated and alkali liquor cannot be treated in time, so that the treatment efficiency is low.
In order to achieve the purpose, the invention provides the following technical scheme:
the utility model provides a blast furnace gas desulphurization unit, includes the sack cleaner, the output of sack cleaner link up fixedly connected with catalytic tower that hydrolysises, and the output of catalytic tower that hydrolysises link up fixedly connected with desulfurization cooling tower, and the input of desulfurization cooling tower link up fixed mounting and has alkali lye charge device, and the output of desulfurization cooling tower link up fixed mounting and has alkali lye eduction gear, still installs pH value monitoring devices on the desulfurization cooling tower, pH value monitoring devices and alkali lye eduction gear electric connection, and the top of desulfurization cooling tower is connected with gas exhaust apparatus.
As a still further scheme of the invention: the bag-type dust collector and the hydrolysis catalytic tower are arranged between the two, the hydrolysis catalytic tower and the desulfurization cooling tower are arranged between the two, the desulfurization cooling tower and the alkali liquor feeding device are arranged between the two, the desulfurization cooling tower and the alkali liquor discharging device are arranged between the two, and the gas discharging device is arranged between the two and is provided with a valve.
As a still further scheme of the invention: a method for desulfurizing blast furnace gas comprises the following steps:
s1, introducing the blast furnace gas into a bag-type dust collector, filtering smoke dust in the blast furnace gas, regularly detecting a dust bag in the bag-type dust collector, judging the filtering effect, and selecting replacement or cleaning;
s2, after the blast furnace gas is dedusted by a bag-type deduster, the dedusted gas is discharged into a hydrolysis catalytic tower, the COS is reacted and converted, and the reaction product is transferred into a desulfurization cooling tower;
s3, spraying alkali liquor on the reaction product containing sulfur in a desulfurization cooling tower, and reacting the reaction product mainly containing H2S;
s4, the pH value monitoring device can monitor the pH value of the alkali liquor in the desulfurization cooling tower in real time and transmit information to the alkali liquor discharging device, when the pH value of the alkali liquor in the desulfurization cooling tower is not in a normal range, the alkali liquor discharging device is started to discharge the alkali liquor in the desulfurization cooling tower, after waste liquor is discharged, the alkali liquor feeding device supplements the alkali liquor in the desulfurization cooling tower through a pump, and at the moment, a valve between the hydrolysis catalytic tower and the desulfurization cooling tower is closed;
and S5, the gas discharge device is in an open state when the whole device works, and the treated blast furnace gas is discharged into a corresponding gas pipe network.
As a still further scheme of the invention: the bottom of desulfurization cooling tower is provided with weighing transducer, and weighing transducer and alkali lye charge device electric connection, and alkali lye charge device has the function of ration and stirring, and is connected with the water source, can modulate alkali lye immediately.
As a still further scheme of the invention: in S3 and S4, the alkali liquor is NaOH or KOH aqueous solution, the pH value of the NaOH or KOH solution is 9.5-10.5, and the normal range of the pH value of the alkali liquor in the desulfurization cooling tower is less than or equal to 8.
As a still further scheme of the invention: in step S1, the dust content of the blast furnace gas after being processed by the bag-type dust collector should be no greater than 4.5mg/m3, and a device for detecting the dust content is provided in the bag-type dust collector and displays the data of the dust content in real time.
As a still further scheme of the invention: in the step S2, the working temperature in the hydrolysis catalytic tower is 70-140 ℃, and the pressure for reaction is less than or equal to 50 kPa.
As a still further scheme of the invention: in the step S2, the catalyst for hydrolysis in the hydrolysis catalyst tower is honeycomb-shaped γ -Al2O3And concomitant stirring during hydrolysis.
As a still further scheme of the invention: in the step S4, a device for removing mist is disposed in the desulfurization cooling tower, and the sulfur content in the gas exhaust device is detected, and if the sulfur content does not meet the usage standard, the gas inlet at the gas exhaust device is shut down, or the gas inlet before the gas exhaust device is shut down.
Compared with the prior art, the invention has the beneficial effects that: the dust removal and desulfurization treatment can be carried out on the blast furnace gas, the treated blast furnace gas can be guided into a gas pipe network for users to use, resources are utilized, the used alkali liquor can be treated in time, and the alkali liquor can be added according to needs, so that the treatment on the blast furnace gas is more convenient.
Drawings
Fig. 1 is a schematic view of the overall structure of the present invention.
In the figure: 1. a bag-type dust collector; 2. a hydrolysis catalyst tower; 3. a desulfurization cooling tower; 4. an alkali liquor dosing device; 5. a gas exhaust device; 6. an alkali liquor discharge device; 7. and a pH value monitoring device.
Detailed Description
The technical solution in the embodiment of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiment of the present invention, and with reference to fig. 1, the embodiment of the present invention is as follows:
the utility model provides a blast furnace gas desulphurization unit, including sack cleaner 1, sack cleaner 1's output link up fixedly connected with catalytic tower 2 that hydrolysises, the output of catalytic tower 2 that hydrolysises link up fixedly connected with desulfurization cooling tower 3, the input of desulfurization cooling tower 3 link up fixedly mounted has alkali lye charge device 4, the output of desulfurization cooling tower 3 link up fixedly mounted has alkali lye eduction gear 6, still install pH value monitoring devices 7 on the desulfurization cooling tower 3, pH value monitoring devices 7 and 6 electric connection of alkali lye eduction gear, the top of desulfurization cooling tower 3 is connected with gas exhaust apparatus 5.
Further, the bag-type dust collector 1 and the hydrolysis catalysis tower 2, the hydrolysis catalysis tower 2 and the desulfurization cooling tower 3, the desulfurization cooling tower 3 and the alkali liquor feeding device 4, the desulfurization cooling tower 3 and the alkali liquor discharging device 6, the desulfurization cooling tower 3 and the gas discharging device 5, and the gas discharging device 5 are provided with valves.
Further, the blast furnace gas desulfurization method comprises the following steps:
s1, introducing blast furnace gas into the bag-type dust collector 1, filtering smoke dust in the blast furnace gas, regularly detecting dust removing bags in the bag-type dust collector 1, judging the filtering effect, and selecting replacement or cleaning;
s2, after the blast furnace gas is dedusted by the bag-type deduster 1, the dedusted gas is discharged into the hydrolysis catalytic tower 2, the COS is reacted and converted, and the reaction product is transferred into the desulfurization cooling tower 3;
s3, spraying alkali liquor on the reaction product containing sulfur in the desulfurization cooling tower 3, and reacting the reaction product mainly comprising H2S;
s4, the pH value monitoring device 7 can monitor the pH value of the alkali liquor inside the desulfurization cooling tower 3 in real time and transmit information to the alkali liquor discharging device 6, when the pH value of the alkali liquor inside the desulfurization cooling tower 3 is not within a normal range, the alkali liquor discharging device 6 is started to discharge the alkali liquor inside the desulfurization cooling tower 3, after waste liquor is discharged, the alkali liquor dosing device 4 supplements the alkali liquor inside the desulfurization cooling tower 3 through a pump, and at the moment, a valve between the hydrolysis catalytic tower 2 and the desulfurization cooling tower 3 is closed;
s5, the gas discharge device 5 is in an open state when the whole works, and the treated blast furnace gas is discharged into a corresponding gas pipe network.
Further, the bottom of desulfurization cooling tower 3 is provided with weighing transducer, and weighing transducer and 4 electric connection of alkali lye charge device, and alkali lye charge device 4 has the function of ration and stirring, and is connected with the water source, can modulate alkali lye immediately.
Further, in S3 and S4, the alkali liquor is an aqueous solution of NaOH or KOH, the pH value of the NaOH or KOH solution is 9.5-10.5, and the normal range of the pH value of the alkali liquor in the desulfurization cooling tower 3 is not more than 8.
Further, in step S1, the dust content of the blast furnace gas after being processed by the bag-type dust collector 1 should be less than or equal to 4.5mg/m3, and a device for detecting the dust content is arranged in the bag-type dust collector 1, and the data of the dust content is displayed in real time.
Further, in step S2, the working temperature in the hydrolysis catalyst tower 2 is 70-140 ℃, and the pressure for the reaction is less than or equal to 50 kPa.
Further, in step S2, the catalyst for hydrolysis in the hydrolysis catalyst tower 2 is honeycomb-shaped γ -Al2O3And concomitant stirring during hydrolysis.
Further, in step S4, a device for removing mist is disposed in the desulfurization cooling tower 3, and the sulfur content in the gas exhaust device 5 is detected, and if the sulfur content does not meet the use standard, i.e., the gas inlet of the gas exhaust device 5 is closed, the gas inlet in front of the gas exhaust device 5 may also be closed.
The above description is only for the preferred embodiment of the present invention, but the scope of the present invention is not limited thereto, and any person skilled in the art should be considered to be within the technical scope of the present invention, and the technical solutions and the inventive concepts thereof according to the present invention are equivalent to or changed within the technical scope of the present invention.
Claims (9)
1. The utility model provides a blast furnace gas desulphurization unit, including sack cleaner (1), a serial communication port, the output of sack cleaner (1) link up fixedly connected with hydrolysis catalysis tower (2), the output of hydrolysis catalysis tower (2) link up fixedly connected with desulfurization cooling tower (3), the input of desulfurization cooling tower (3) link up fixedly mounted has alkali lye charge device (4), the output of desulfurization cooling tower (3) link up fixedly mounted has alkali lye eduction gear (6), still install pH value monitoring devices (7) on desulfurization cooling tower (3), pH value monitoring devices (7) and alkali lye eduction gear (6) electric connection, the top of desulfurization cooling tower (3) is connected with gas exhaust apparatus (5).
2. The blast furnace gas desulfurization device according to claim 1, characterized in that valves are disposed between the bag-type dust collector (1) and the hydrolysis catalyst tower (2), between the hydrolysis catalyst tower (2) and the desulfurization cooling tower (3), between the desulfurization cooling tower (3) and the alkali solution feeding device (4), between the desulfurization cooling tower (3) and the alkali solution discharging device (6), between the desulfurization cooling tower (3) and the gas discharging device (5), and the gas discharging device (5) itself.
3. A method for desulfurizing blast furnace gas according to any one of claims 1 to 2, comprising the steps of:
s1, introducing blast furnace gas into the bag-type dust collector (1), filtering smoke dust in the blast furnace gas, periodically detecting a dust bag in the bag-type dust collector (1), judging the filtering effect, and selecting replacement or cleaning;
s2, after the blast furnace gas is dedusted by the bag-type deduster (1), the dedusted gas is discharged into the hydrolysis catalytic tower (2), the COS is reacted and converted, and the reaction product is transferred into the desulfurization cooling tower (3);
s3, spraying alkali liquor into the reaction product containing sulfur in the desulfurizing and cooling tower (3) to obtain H2Reacting the reaction product of S;
s4, the pH value monitoring device (7) can monitor the pH value of the alkali liquor inside the desulfurization cooling tower (3) in real time and transmit information to the alkali liquor discharging device (6), when the pH value of the alkali liquor in the desulfurization cooling tower (3) is not within a normal range, the alkali liquor discharging device (6) is started to discharge the alkali liquor in the desulfurization cooling tower (3), after waste liquor is discharged, the alkali liquor dosing device (4) supplements the alkali liquor in the desulfurization cooling tower (3) through a pump, and at the moment, a valve between the hydrolysis catalytic tower (2) and the desulfurization cooling tower (3) is closed;
s5, the gas discharge device (5) is in an open state when the whole works, and the treated blast furnace gas is discharged into a corresponding gas pipe network.
4. The blast furnace gas desulfurization method according to claim 3, characterized in that a weight sensor is arranged at the bottom of the desulfurization cooling tower (3), and the weight sensor is electrically connected with the alkali solution feeding device (4), and the alkali solution feeding device (4) has the functions of quantification and stirring, is connected with a water source, and can instantly prepare alkali solution.
5. The method for desulfurizing blast furnace gas according to claim 3, wherein in S3 and S4, the alkali solution is an aqueous solution of NaOH or KOH, the pH value of the NaOH or KOH solution is 9.5-10.5, and the normal range of the pH value of the alkali solution in the desulfurizing and cooling tower (3) is not more than 8.
6. The method for desulfurizing blast furnace gas according to claim 3, wherein in step S1, the dust content of the blast furnace gas after being processed by the bag-type dust collector (1) is less than or equal to 4.5mg/m3And equipment for detecting dust content is arranged in the bag-type dust collector (1), and data of the dust content is displayed in real time.
7. The method for desulfurizing blast furnace gas according to claim 3, wherein in step S2, the operating temperature in the hydrolysis catalyst tower (2) is 70-140 ℃, and the pressure for reaction is less than or equal to 50 kPa.
8. The method for desulfurizing blast furnace gas according to claim 3, wherein in step S2, the catalyst for hydrolysis in the hydrolysis catalytic tower (2) is honeycomb-shaped γ -Al2O3And concomitant stirring during hydrolysis.
9. The method for desulfurizing blast furnace gas according to claim 3, wherein in step S4, a device for removing mist is provided in the desulfurizing and cooling tower (3), and the sulfur content in the gas discharging device (5) is detected, and if the sulfur content does not reach the standard, namely the gas inlet at the gas discharging device (5) is shut down, the gas inlet before the gas discharging device (5) is also shut down.
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| CN202210346635.1A CN114644947A (en) | 2022-03-31 | 2022-03-31 | Blast furnace gas desulfurization device and method |
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| CN202210346635.1A CN114644947A (en) | 2022-03-31 | 2022-03-31 | Blast furnace gas desulfurization device and method |
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| CN112195043A (en) * | 2020-09-28 | 2021-01-08 | 武汉钢铁有限公司 | Blast furnace gas desulfurization method and device |
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| CN216024374U (en) * | 2021-10-09 | 2022-03-15 | 南京万象新材料科技有限责任公司 | Automatic metering blending tank for production of composite desulfurizer |
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Application publication date: 20220621 |