CN112852504A - System and process for prolonging service life of blast furnace gas fine desulfurization reactant - Google Patents
System and process for prolonging service life of blast furnace gas fine desulfurization reactant Download PDFInfo
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- CN112852504A CN112852504A CN202011612609.6A CN202011612609A CN112852504A CN 112852504 A CN112852504 A CN 112852504A CN 202011612609 A CN202011612609 A CN 202011612609A CN 112852504 A CN112852504 A CN 112852504A
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- 239000000376 reactant Substances 0.000 title claims abstract description 69
- 238000006477 desulfuration reaction Methods 0.000 title claims abstract description 32
- 230000023556 desulfurization Effects 0.000 title claims abstract description 32
- 238000000034 method Methods 0.000 title claims abstract description 15
- JJWKPURADFRFRB-UHFFFAOYSA-N carbonyl sulfide Chemical compound O=C=S JJWKPURADFRFRB-UHFFFAOYSA-N 0.000 claims abstract description 36
- 238000006460 hydrolysis reaction Methods 0.000 claims abstract description 25
- 230000007062 hydrolysis Effects 0.000 claims abstract description 15
- NINIDFKCEFEMDL-UHFFFAOYSA-N Sulfur Chemical compound [S] NINIDFKCEFEMDL-UHFFFAOYSA-N 0.000 claims abstract description 12
- 229910052717 sulfur Inorganic materials 0.000 claims abstract description 11
- 239000011593 sulfur Substances 0.000 claims abstract description 11
- 238000006555 catalytic reaction Methods 0.000 claims abstract description 9
- 238000006243 chemical reaction Methods 0.000 claims abstract description 7
- HEMHJVSKTPXQMS-UHFFFAOYSA-M Sodium hydroxide Chemical compound [OH-].[Na+] HEMHJVSKTPXQMS-UHFFFAOYSA-M 0.000 claims description 72
- 238000011084 recovery Methods 0.000 claims description 14
- 238000005507 spraying Methods 0.000 claims description 14
- 239000007921 spray Substances 0.000 claims description 12
- 230000018044 dehydration Effects 0.000 claims description 9
- 238000006297 dehydration reaction Methods 0.000 claims description 9
- 239000003054 catalyst Substances 0.000 claims description 5
- 239000002245 particle Substances 0.000 claims description 3
- 239000007787 solid Substances 0.000 claims description 3
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Chemical compound O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 3
- 239000007789 gas Substances 0.000 description 28
- RWSOTUBLDIXVET-UHFFFAOYSA-N Dihydrogen sulfide Chemical compound S RWSOTUBLDIXVET-UHFFFAOYSA-N 0.000 description 9
- 229910000037 hydrogen sulfide Inorganic materials 0.000 description 9
- RAHZWNYVWXNFOC-UHFFFAOYSA-N Sulphur dioxide Chemical compound O=S=O RAHZWNYVWXNFOC-UHFFFAOYSA-N 0.000 description 4
- LSDPWZHWYPCBBB-UHFFFAOYSA-N Methanethiol Chemical compound SC LSDPWZHWYPCBBB-UHFFFAOYSA-N 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 238000010248 power generation Methods 0.000 description 2
- 239000000047 product Substances 0.000 description 2
- 150000003568 thioethers Chemical class 0.000 description 2
- 239000004215 Carbon black (E152) Substances 0.000 description 1
- QMMFVYPAHWMCMS-UHFFFAOYSA-N Dimethyl sulfide Chemical compound CSC QMMFVYPAHWMCMS-UHFFFAOYSA-N 0.000 description 1
- 229910000831 Steel Inorganic materials 0.000 description 1
- UCKMPCXJQFINFW-UHFFFAOYSA-N Sulphide Chemical compound [S-2] UCKMPCXJQFINFW-UHFFFAOYSA-N 0.000 description 1
- 239000005864 Sulphur Substances 0.000 description 1
- 239000006227 byproduct Substances 0.000 description 1
- QGJOPFRUJISHPQ-NJFSPNSNSA-N carbon disulfide-14c Chemical compound S=[14C]=S QGJOPFRUJISHPQ-NJFSPNSNSA-N 0.000 description 1
- 230000003197 catalytic effect Effects 0.000 description 1
- 239000003795 chemical substances by application Substances 0.000 description 1
- 238000002485 combustion reaction Methods 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000003795 desorption Methods 0.000 description 1
- 230000003009 desulfurizing effect Effects 0.000 description 1
- 238000001514 detection method Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 239000000428 dust Substances 0.000 description 1
- 230000007613 environmental effect Effects 0.000 description 1
- 230000020169 heat generation Effects 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
- 125000001741 organic sulfur group Chemical group 0.000 description 1
- 238000005453 pelletization Methods 0.000 description 1
- 230000008092 positive effect Effects 0.000 description 1
- 238000000746 purification Methods 0.000 description 1
- 238000005245 sintering Methods 0.000 description 1
- 239000010959 steel Substances 0.000 description 1
- 150000003464 sulfur compounds Chemical class 0.000 description 1
Images
Classifications
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- 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
-
- 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
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P20/00—Technologies relating to chemical industry
- Y02P20/10—Process efficiency
- Y02P20/129—Energy recovery, e.g. by cogeneration, H2recovery or pressure recovery turbines
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- 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)
- Treating Waste Gases (AREA)
- Waste-Gas Treatment And Other Accessory Devices For Furnaces (AREA)
Abstract
The invention provides a system and a process for prolonging the service life of a blast furnace gas fine desulfurization reactant. The invention adopts the carbonyl sulfide hydrolysis catalysis system and the inorganic sulfur removal system to carry out fine desulfurization treatment on the blast furnace gas, and achieves the purposes of prolonging the service life of the reactant and reducing the operation cost through the process flow and the special structure device of the reaction equipment.
Description
Technical Field
The invention relates to the technical field of blast furnace gas desulfurization, in particular to a system and a process for prolonging the service life of a blast furnace gas fine desulfurization reactant.
Background
Blast furnace gas is a main byproduct generated in an iron-making process flow, contains 22-30% of CO and a small amount of hydrocarbon, and the balance is non-combustible components. At present, blast furnace gas of a steel mill is mainly used for hot blast furnaces, sintering, pelletizing, heating furnaces and subsequent boiler power generation after being subjected to dust removal and purification. However, sulfur compounds in blast furnace gas can generate a large amount of sulfur dioxide during combustion power generation and heat generation, which violates increasingly stringent environmental protection requirements. The related detection results show that the total sulfide concentration in the blast furnace gas is generally 50-300 mg/m 3. The types of sulfides can be divided into two main types, one is inorganic sulfur comprising sulfur dioxide and hydrogen sulfide, the other is organic sulfur comprising carbonyl sulfide, carbon disulfide, methyl mercaptan, methyl sulfide and the like, and the sulfides in the blast furnace gas mainly comprise the hydrogen sulfide and the carbonyl sulfide. At present, the technology for removing hydrogen sulfide is very mature, and the technology for desulfurizing carbonyl sulfide is to convert carbonyl sulfide into hydrogen sulfide and then remove the hydrogen sulfide by a hydrolysis catalysis method.
However, the existing reactant has low fine desulfurization efficiency and short service life, so that the operation cost is increased.
Disclosure of Invention
The invention aims to solve the defects in the prior art and provides a system and a process for prolonging the service life of a blast furnace gas fine desulfurization reactant.
In order to achieve the purpose, the invention adopts the following technical scheme: a system for prolonging the service life of a blast furnace gas fine desulfurization reactant comprises a carbonyl sulfide hydrolysis catalysis system, an inorganic sulfur removal system and a NaOH solution circulating supply system.
Further, the carbonyl sulfide hydrolysis catalysis system comprises an A tower inlet air equalizing device which is arranged at an A tower inlet; and the hydrolysis reaction device is arranged inside the tower A and is arranged in multiple layers.
Further, inorganic sulphur desorption system, including B tower and C tower, B tower and C tower series connection, B tower upper portion sets up B tower reactant spraying system, B tower reactant spraying system mainly comprises the multiunit spray gun, B tower bottom sets up B tower toper reactant recovery unit, set up the special dewatering device of C tower in the C tower, C tower bottom sets up C tower toper reactant recovery unit.
Further, the reactant used by the carbonyl sulfide hydrolysis catalytic system is a solid hydrolysis catalyst.
Further, the tower A is a vertical tower or a horizontal tower.
Further, the tower B and the tower C are both vertical towers.
Furthermore, the reactant used by the NaOH solution circulating supply system is NaOH solution with the concentration of 1-3 per mill.
Further, the number of the reactant spraying systems is more than 3, and each layer of reactant spraying system is composed of 6-12 groups of spray guns.
Furthermore, the hydrolysis reaction device has 4-10 layers.
A process for prolonging the service life of a blast furnace gas fine desulfurization reactant comprises the following process flows:
a. blast furnace gas enters the tower A through the air equalizing device and then enters the hydrolysis reaction device to complete the conversion of carbonyl sulfide to H2S,
b. after passing through a TRT/BPRT/pressure reducing valve bank, the tower B enters to realize H2The removal of the S is carried out,
c. then enters the C tower from the top of the C tower, passes through a special dehydration device of the C tower, and enters a gas pipe network from an outlet at the lower part of the C tower, thereby realizing the fine desulfurization of the blast furnace gas;
d. the inorganic sulfur desulfurization reactant NaOH solution enters a B tower reactant spraying system from a NaOH solution circulating supply system, then enters the B tower from a spray gun, reacts with H2S in blast furnace gas in the B tower, and a product and an unreacted reactant return to the NaOH solution circulating supply system from a B tower conical reactant recovery device; and after the desulfurized blast furnace gas enters the C tower and passes through the special dehydration device for the C tower, water vapor and unreacted NaOH solution atomized particles contained in the gas are separated from the gas, fall back to the conical reactant recovery device at the bottom of the C tower and finally return to the NaOH solution circulating supply system, so that the desulfurization reactant completes a cycle, and the reactant is fully utilized.
Compared with the prior art, the invention has the advantages and positive effects that,
the invention adopts the carbonyl sulfide hydrolysis catalysis system and the inorganic sulfur removal system to carry out fine desulfurization treatment on the blast furnace gas, and achieves the purposes of prolonging the service life of the reactant and reducing the operation cost through the process flow and the special structure device of the reaction equipment.
Drawings
FIG. 1 is a schematic diagram of the system of the present invention;
illustration of the drawings: 1, an air equalizing device; 2, a hydrolysis reaction device; 3, a reactant spraying system; 4, a spray gun; a conical reactant recovery device of the 5B tower; 6 special dehydration device; 7C tower toper reactant recovery unit.
Detailed Description
In order that the above objects, features and advantages of the present invention can be more clearly understood, the present invention will be further described with reference to the accompanying drawings and examples. It should be noted that the embodiments and features of the embodiments of the present application may be combined with each other without conflict.
In the following description, numerous specific details are set forth in order to provide a thorough understanding of the present invention, however, the present invention may be practiced in other ways than those specifically described herein, and thus the present invention is not limited to the specific embodiments of the present disclosure.
Example 1
As shown in figure 1, the invention provides a system for prolonging the service life of a blast furnace gas fine desulfurization reactant, which comprises a carbonyl sulfide hydrolysis catalysis system, an inorganic sulfur removal system and a NaOH solution circulating supply system.
The carbonyl sulfide hydrolysis catalysis system comprises a tower A inlet air equalizing device 1 which is arranged at a tower A inlet; and a hydrolysis reaction device 2 which is arranged inside the tower A and is arranged in multiple layers. The inorganic sulfur removal system comprises a tower B and a tower C, wherein the tower B and the tower C are connected in series, the upper part of the tower B is provided with a tower B reactant spraying system 3, the tower B reactant spraying system 3 mainly comprises a plurality of groups of spray guns 4, the bottom of the tower B is provided with a tower B conical reactant recovery device 5, the tower C is internally provided with a tower C special dehydration device 6, and the bottom of the tower C is provided with a tower C conical reactant recovery device 7; the reaction agent used by the carbonyl sulfide hydrolysis catalysis system is a solid hydrolysis catalyst; the tower A is a vertical tower or a horizontal tower; the tower B and the tower C are both vertical towers; the reactant used by the NaOH solution circulating supply system is NaOH solution with the concentration of 1-3 per mill; the number of the reactant spraying systems 3 is more than 3, and each layer of reactant spraying system consists of 6-12 groups of spray guns 4; the hydrolysis reaction device 2 has 4-10 layers.
A process for prolonging the service life of a blast furnace gas fine desulfurization reactant comprises the following process flows:
a. blast furnace gas enters the tower A through the air equalizing device 1 and then enters the hydrolysis reaction device 2 to complete the conversion of carbonyl sulfide to H2S,
b. after passing through a TRT/BPRT/pressure reducing valve bank, the tower B enters to realize H2The removal of the S is carried out,
c. then enters the C tower from the top of the C tower, passes through a special dehydration device 6 of the C tower, and enters a gas pipe network from an outlet at the lower part of the C tower, thereby realizing the fine desulfurization of the blast furnace gas;
d. the inorganic sulfur desulfurization reactant NaOH solution enters a B tower reactant spraying system 3 from a NaOH solution circulating supply system, then enters the B tower from a spray gun 4, reacts with H2S in blast furnace gas in the B tower, and a product and an unreacted reactant return to the NaOH solution circulating supply system from a B tower conical reactant recovery device 5; after the desulfurized blast furnace gas enters the C tower and passes through the special dehydration device for the C tower, water vapor and unreacted NaOH solution atomized particles contained in the gas are separated from the gas, fall back to the conical reactant recovery device at the bottom of the C tower and finally return to the NaOH solution circulating supply system, so that the desulfurization reactant completes a cycle, the reactant is fully utilized, and the purpose of prolonging the service life of the reactant is achieved.
The above description is only a preferred embodiment of the present invention, and not intended to limit the present invention in other forms, and any person skilled in the art may apply the above modifications or changes to the equivalent embodiments with equivalent changes, without departing from the technical spirit of the present invention, and any simple modification, equivalent change and change made to the above embodiments according to the technical spirit of the present invention still belong to the protection scope of the technical spirit of the present invention.
Claims (10)
1. A system for prolonging the service life of a blast furnace gas fine desulfurization reactant is characterized by comprising a carbonyl sulfide hydrolysis catalysis system, an inorganic sulfur removal system and a NaOH solution circulating supply system.
2. The system for prolonging the service life of the blast furnace gas fine desulfurization reactant according to claim 1, characterized in that the carbonyl sulfide hydrolysis catalyst system comprises an A tower inlet air equalizing device (1) arranged at an A tower inlet; and the hydrolysis reaction device (2) is arranged inside the tower A and is arranged in multiple layers.
3. The system for prolonging the service life of the blast furnace gas fine desulfurization reactant according to claim 1, wherein the inorganic sulfur removal system comprises a tower B and a tower C, the tower B and the tower C are connected in series, a tower B reactant spray system (3) is arranged at the upper part of the tower B, the tower B reactant spray system (3) mainly comprises a plurality of groups of spray guns (4), a tower B conical reactant recovery device (5) is arranged at the bottom of the tower B, a special dehydration device (6) for the tower C is arranged in the tower C, and a tower C conical reactant recovery device (7) is arranged at the bottom of the tower C.
4. A process for prolonging the service life of a blast furnace gas fine desulfurization reactant comprises the following process flows:
a. blast furnace gas enters the tower A through the air equalizing device (1) and then enters the hydrolysis reaction device (2) to finish the conversion of carbonyl sulfide to H2The conversion of the S is carried out,
b. after passing through a TRT/BPRT/pressure reducing valve bank, enters a tower B to realize the removal of H2S,
c. then enters the C tower from the top of the C tower, passes through a special dehydration device (6) of the C tower, and enters a gas pipe network from an outlet at the lower part of the C tower, thereby realizing the fine desulfurization of the blast furnace gas;
d. the inorganic sulfur desulfurization reactant NaOH solution enters a B tower reactant spraying system (3) from a NaOH solution circulating supply system, then enters the B tower from a spray gun (4), and enters the B tower and H in blast furnace gas in the B tower2S is reacted, and products and unreacted reactants return to the NaOH solution circulating supply system from the B tower conical reactant recovery device (5); and after the desulfurized blast furnace gas enters the tower C and passes through a special dehydration device for the tower C, water vapor and unreacted NaOH solution atomized particles contained in the gas are separated from the gas, fall back to a conical reactant recovery device at the bottom of the tower C and finally return to a NaOH solution circulating supply system, so that the desulfurization reactant completes a cycle.
5. The system for prolonging the service life of the blast furnace gas fine desulfurization reactant according to claim 1 or 2, wherein the reactant used by the carbonyl sulfide hydrolysis catalyst system is a solid hydrolysis catalyst.
6. The system for prolonging the service life of the blast furnace gas fine desulfurization reactant according to claim 2, wherein the tower A is a vertical tower or a horizontal tower.
7. The system for prolonging the service life of the blast furnace gas fine desulfurization reactant according to claim 3, wherein the tower B and the tower C are both vertical towers.
8. The system for prolonging the service life of the blast furnace gas fine desulfurization reactant according to claim 1, wherein the reactant used by the NaOH solution circulating supply system is NaOH solution with the concentration of 1-3 per mill.
9. The system for prolonging the service life of the blast furnace gas fine desulfurization reactant according to claim 3, wherein the number of the reactant spraying systems (3) is more than 3 layers, and each layer of the reactant spraying systems consists of 6-12 groups of spray guns (4).
10. The system for prolonging the service life of the blast furnace gas fine desulfurization reactant according to claim 2, wherein the hydrolysis reaction device (2) has 4-10 layers.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011612609.6A CN112852504A (en) | 2020-12-30 | 2020-12-30 | System and process for prolonging service life of blast furnace gas fine desulfurization reactant |
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| CN202011612609.6A CN112852504A (en) | 2020-12-30 | 2020-12-30 | System and process for prolonging service life of blast furnace gas fine desulfurization reactant |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114196448A (en) * | 2022-02-16 | 2022-03-18 | 北京中航天业科技有限公司 | Full-flow dry type blast furnace gas fine desulfurization system and method |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110643395A (en) * | 2019-10-15 | 2020-01-03 | 北京北科环境工程有限公司 | Blast furnace gas fine desulfurization process |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN110643395A (en) * | 2019-10-15 | 2020-01-03 | 北京北科环境工程有限公司 | Blast furnace gas fine desulfurization process |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114196448A (en) * | 2022-02-16 | 2022-03-18 | 北京中航天业科技有限公司 | Full-flow dry type blast furnace gas fine desulfurization system and method |
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