CN110819393A - Method and device for fine desulfurization and purification of blast furnace gas - Google Patents
Method and device for fine desulfurization and purification of blast furnace gas Download PDFInfo
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- CN110819393A CN110819393A CN201911170615.8A CN201911170615A CN110819393A CN 110819393 A CN110819393 A CN 110819393A CN 201911170615 A CN201911170615 A CN 201911170615A CN 110819393 A CN110819393 A CN 110819393A
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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
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- C—CHEMISTRY; METALLURGY
- C01—INORGANIC CHEMISTRY
- C01B—NON-METALLIC ELEMENTS; COMPOUNDS THEREOF; METALLOIDS OR COMPOUNDS THEREOF NOT COVERED BY SUBCLASS C01C
- C01B17/00—Sulfur; Compounds thereof
- C01B17/02—Preparation of sulfur; Purification
- C01B17/04—Preparation of sulfur; Purification from gaseous sulfur compounds including gaseous sulfides
- C01B17/05—Preparation of sulfur; Purification from gaseous sulfur compounds including gaseous sulfides by wet processes
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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
- C10K1/32—Purifying combustible gases containing carbon monoxide with selectively adsorptive solids, e.g. active carbon
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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
- C10K1/34—Purifying combustible gases containing carbon monoxide by catalytic conversion of impurities to more readily removable materials
Abstract
The invention provides a method for fine desulfurization and purification of blast furnace gas, which comprises the following steps: s1, the blast furnace gas enters a conversion unit under positive pressure to convert organic sulfur in the blast furnace gas into hydrogen sulfide; s2, cooling in a cooling unit; and S3, enabling the cooled material flow to enter an adsorption unit filled with adsorption materials, and adsorbing and removing sulfides in the blast furnace gas to form clean gas. The invention enriches the low-concentration sulfide in the blast furnace gas into the sulfur-rich concentrated gas, converts the working condition of large-gas-quantity and low-concentration sulfide into the working condition of small-gas-quantity and high-concentration, can improve the desulfurization effect, reduce the desulfurization investment cost and the operation cost, can recover the sulfur element in the blast furnace gas, has high atom economy and reduces the secondary pollution.
Description
Technical Field
The invention relates to the technical field of blast furnace gas purification, in particular to a method and a device for fine desulfurization and purification of blast furnace gas.
Background
Blast furnace gas is one of main byproducts in the steel industry, and has a large amount of surplus besides being used by a blast furnace hot blast stove. At present, a part of coal-fired power boilers or small mixed gas boilers are co-fired for utilization, but the recovery amount is small. Therefore, how to fully utilize the surplus blast furnace gas, avoid energy waste and environmental pollution caused by emptying emission, promote the benign interaction of resources, energy, environment and society is a new obstacle in the process of energy conservation and emission reduction. The traditional terminal treatment technology is not more and more suitable for the environmental protection requirement under the new situation, and the steel mill has to carry out the pretreatment of the pollution source, which is the inevitable trend of environmental treatment. For example, the environmental protection bureau of Tangshan et al proposes the idea of cleaning and utilizing blast furnace gas before desulfurization, and the new direction of treating sulfide is clarified. Compared with flue gas, blast furnace gas has large gas quantity, low total sulfur content and more sulfide types, such as H2S、COS、CS2Mercaptan, etc. are often accompanied by a great deal of carbon monoxide and carbon dioxide, the gas has high toxicity and is not allowed to leak, oxygen is not allowed to leak, etc., and the characteristics lead to the blast furnace gasThe difficulty of desulfurization is great.
Document CN110218828A relates to a blast furnace gas purification method: after dust removal and TRT power generation, blast furnace gas enters a comprehensive purification tower containing an adsorption material to remove sulfides and chlorides in the gas. The method has the following defects: the temperature of blast furnace gas generated by TRT is 120-160 ℃, and the adsorption desulfurization effect is poor without cooling; the blast furnace gas contains various sulfides, the sulfides are difficult to be removed completely by a single adsorbent, and the sulfur element is not recovered.
Document CN109609202A relates to a method for desulfurizing and purifying blast furnace gas, which includes dedusting the blast furnace gas, introducing the blast furnace gas into an organic sulfur conversion device, converting organic sulfur in the blast furnace gas into hydrogen sulfide, and recovering pressure energy and heat energy through a residual pressure turbine power generation device; and (4) entering a wet desulphurization unit to prepare sulfur. Although this method can recover elemental sulfur, the greatest disadvantage of this method is: the blast furnace gas flow is large, the total sulfur content is low, the wet oxidation desulfurization is directly carried out after hydrolysis, the difficulty is high, the efficiency is low, the corresponding equipment is large, the investment is large, and the operation cost is high.
In conclusion, how to convert the working conditions of high gas flow, low total sulfur content and many sulfide types of blast furnace gas into small gas flow, high sulfide concentration and single sulfide type is a problem which needs to be solved urgently in the purification and desulfurization of the blast furnace gas. The invention uses the conversion catalyst to convert a plurality of sulfides in the blast furnace gas into hydrogen sulfide, and the hydrogen sulfide is sent into the adsorption unit for adsorption-desorption concentration after being cooled, so that the working condition of low concentration with large air quantity is converted into the working condition of high concentration with small air quantity, and the problem of high purification difficulty of the blast furnace gas is pertinently solved.
Disclosure of Invention
The invention aims to overcome the defects of the prior art and provides a method and a device for fine desulfurization and purification of blast furnace gas, which have the advantages of clean purification, low sulfur emission, capability of recycling sulfur elements and the like.
The invention is realized by the following steps:
the invention provides a method for fine desulfurization and purification of blast furnace gas, which comprises the following steps:
s1, the blast furnace gas enters a conversion unit under positive pressure to convert organic sulfur in the blast furnace gas into hydrogen sulfide;
s2, cooling in a cooling unit;
and S3, enabling the cooled material flow to enter an adsorption unit filled with adsorption materials, and adsorbing and removing sulfides in the blast furnace gas to form clean gas.
Further, one part of the clean gas enters a gas pipe network for output, and the other part of the clean gas enters a heating unit; introducing the heated high-temperature clean gas into an adsorption unit, carrying out desorption and regeneration on the adsorption material, and forming a sulfur-rich concentrated gas stream after regeneration; and (4) enabling the sulfur-rich concentrated gas stream to enter a wet oxidation desulfurization unit to prepare sulfur.
Furthermore, the conversion units are a plurality of conversion towers which are used in parallel, catalysts are filled in the conversion towers, the conversion towers can be automatically switched, and one conversion tower is ensured to be reserved during operation.
Furthermore, the adsorption units are a plurality of adsorption towers which are used in parallel, and all the adsorption towers can be automatically switched.
Further, the adsorption material is selected from at least one of X-type molecular sieve, Y-type molecular sieve, A-type molecular sieve, ZSM-type molecular sieve, mordenite, β zeolite, MCM-type molecular sieve, ZSM-5/mordenite, ZSM-5/β zeolite, ZSM-5/Y, MCM-22/mordenite or ZSM-5/mordenite/β zeolite.
Further, the catalyst is at least one of self-modified alumina, modified activated carbon or molecular sieve.
Further, the organic sulfur is at least one of carbonyl sulfide, thiol, thioether, thiophene, methyl mercaptan or methyl sulfide.
Further, the total sulfur concentration of the blast furnace gas at the TRT outlet in the step S1 is 50-300 mg/m3And in the step S3, the total sulfur concentration of the clean gas is less than 30mg/Nm 3.
The device for fine desulfurization and purification of blast furnace gas comprises a conversion unit, a cooling unit and an adsorption unit, wherein the conversion unit is used for carrying out organic sulfur catalytic conversion, the adsorption unit is used for adsorbing hydrogen sulfide in the blast furnace gas, the conversion unit is a plurality of conversion towers which are used in parallel, and the adsorption unit is a plurality of adsorption towers which are used in parallel.
The device for blast furnace gas fine desulfurization and purification further comprises a heating unit and a wet oxidation desulfurization unit, wherein the heating unit heats part of clean gas generated by the adsorption unit, the generated high-temperature clean gas is used for refluxing to the adsorption tower to be analyzed and regenerated, and the wet oxidation desulfurization unit is used for treating the sulfur-rich concentrated gas stream formed after regeneration to prepare sulfur.
The invention has the following beneficial effects:
1. the invention adopts the conversion unit to convert a plurality of sulfides in the blast furnace gas into single hydrogen sulfide, thereby reducing the difficulty of subsequent desulfurization;
2. the invention carries out temperature reduction treatment on the blast furnace gas before adsorption, thereby improving the adsorption desulfurization efficiency;
3. the invention adopts the porous adsorption material to adsorb the sulfide in the blast furnace gas, and can completely remove the sulfide in the blast furnace gas;
4. according to the invention, the low-concentration sulfides in the blast furnace gas are enriched into the sulfur-rich concentrated gas by adopting an adsorption-desorption method, and the working conditions of large gas amount and low-concentration sulfides are converted into the working conditions of small gas amount and high concentration, so that the desulfurization effect can be improved, and the desulfurization investment cost and the operation cost are reduced;
5. the conversion unit and the adsorption unit are both multi-tower systems, so that tower switching can be automatically realized, and the stable and continuous operation of the system is ensured;
6. the method can recover sulfur element in blast furnace gas, has high atom economy and reduces secondary pollution.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to the drawings without creative efforts.
FIG. 1 is a block diagram of an embodiment of a fine desulfurization and purification apparatus for blast furnace gas according to the present invention;
fig. 2 is a block diagram of another embodiment of the blast furnace gas fine desulfurization purification device provided by the invention.
In the figure, I is untreated blast furnace gas; II is material flow II, namely the converted blast furnace gas; III is a material flow III, namely coal gas obtained after the material flow II is cooled; IV is material flow IV, namely clean coal gas after sulfide is removed by an adsorption unit; v is material flow V, namely high-temperature clean gas which plays a role in resolving and regenerating after the clean gas is heated and heated; VI is a material flow VI, namely sulfur-rich concentrated gas formed after high-temperature clean coal gas passes through an adsorption tower with saturated adsorption; a is a transformation unit; b is a cooling unit, and C is an adsorption unit; d is a wet oxidation desulfurization unit; e is a subsequent gas pipe network; f is a temperature raising unit.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
Referring to fig. 1, an embodiment of the present invention provides a method for fine desulfurization and purification of blast furnace gas, including the following steps:
s1, the blast furnace gas enters a conversion unit under positive pressure to convert organic sulfur in the blast furnace gas into hydrogen sulfide;
s2, cooling in a cooling unit;
and S3, enabling the cooled material flow to enter an adsorption unit filled with adsorption materials, and adsorbing and removing sulfides in the blast furnace gas to form clean gas.
The device for fine desulfurization and purification of blast furnace gas comprises a conversion unit for carrying out catalytic conversion on organic sulfur, a cooling unit and an adsorption unit for adsorbing hydrogen sulfide in the blast furnace gas, which are connected in sequence, wherein the conversion unit comprises a plurality of conversion towers which are used in parallel, and the adsorption unit comprises a plurality of adsorption towers which are used in parallel.
The conversion units are two conversion towers which are used in parallel, catalysts are filled in the conversion towers, the conversion towers can be automatically switched, and one conversion tower is ensured to be reserved during the operation period; the adsorption unit is two adsorption towers which are used in parallel, and the adsorption towers can be automatically switched.
Referring to fig. 2, an embodiment of the present invention provides a method for fine desulfurization and purification of blast furnace gas, including the following steps:
s1, the blast furnace gas enters a conversion unit under positive pressure to convert organic sulfur in the blast furnace gas into hydrogen sulfide;
s2, cooling in a cooling unit;
and S3, enabling the cooled material flow to enter an adsorption unit filled with adsorption materials, and adsorbing and removing sulfides in the blast furnace gas to form clean gas.
Part of the generated clean gas enters a gas pipe network to be output, and the other part of the generated clean gas enters a heating unit; introducing the heated high-temperature clean gas into an adsorption unit, carrying out desorption and regeneration on the adsorption material, and forming a sulfur-rich concentrated gas stream after regeneration; and (4) enabling the sulfur-rich concentrated gas stream to enter a wet oxidation desulfurization unit to prepare sulfur.
The device comprises a conversion unit, a cooling unit and an adsorption unit, wherein the conversion unit is used for carrying out organic sulfur catalytic conversion, the adsorption unit is used for adsorbing hydrogen sulfide in blast furnace gas, the conversion unit is a plurality of conversion towers which are used in parallel, the adsorption unit is a plurality of adsorption towers which are used in parallel, the device also comprises a heating unit and a wet oxidation desulfurization unit, the heating unit is used for heating part of clean gas generated by the adsorption unit, the generated high-temperature clean gas is used for refluxing into the adsorption towers for analysis and regeneration, and the wet oxidation desulfurization unit is used for treating a sulfur-rich concentrated gas stream formed after regeneration to prepare sulfur.
The conversion units are three conversion towers which are used in parallel, catalysts are filled in the conversion towers, the conversion towers can be automatically switched, and one conversion tower is ensured to be reserved during the operation. The adsorption unit is three adsorption towers which are used in parallel, the adsorption towers can be automatically switched, one adsorption tower is used for desulfurization and adsorption during operation, the other adsorption tower is used for desorption and regeneration, and the other adsorption tower is used for standby.
The cooling unit can be a cooling tower, the wet oxidation desulfurization unit is common equipment in the prior art, and can be a desulfurization regeneration tower, a circulating pump, a sulfur foam tank, a sulfur foam pump and a sulfur melting kettle which are connected through pipelines, and the sulfur production process is not repeated here.
Example 1
The total sulfur concentration in blast furnace gas I is 250mg/m3, the blast furnace gas I enters a conversion unit, organic sulfur in a material flow I is converted into hydrogen sulfide to form a material flow II, and the conversion unit contains a potassium modified alumina catalyst; the material flow II enters a cooling unit to form a material flow III; enabling the material flow III to enter an adsorption unit formed by connecting at least two adsorption towers in parallel, removing hydrogen sulfide in blast furnace gas to form a clean gas material flow IV, wherein the total sulfur content of the material flow IV is 20mg/Nm3, and the adsorption towers contain copper modified molecular sieve adsorption materials; at least two adsorption towers in the adsorption unit are used in parallel, tower switching is automatically carried out, at least one tower is ensured to adsorb sulfides, the other adsorption tower with saturated adsorption is analyzed and regenerated under the action of high-temperature clean gas, and the high-temperature clean gas forms sulfur-rich concentrated gas V; and (4) the sulfur-rich concentrated gas enters a subsequent wet oxidation desulfurization unit to prepare sulfur.
Example 2
The total sulfur concentration in blast furnace gas I is 200mg/m3, the blast furnace gas I enters a conversion unit, organic sulfur in a material flow I is converted into hydrogen sulfide to form a material flow II, and the conversion unit contains a sodium modified alumina catalyst; the material flow II enters a cooling unit to form a material flow III; enabling the material flow III to enter an adsorption unit formed by connecting at least two adsorption towers in parallel, removing hydrogen sulfide in blast furnace gas to form a clean gas material flow IV, wherein the total sulfur content of the material flow IV is 15mg/Nm3, and the adsorption towers contain copper modified molecular sieve adsorption materials; at least two adsorption towers in the adsorption unit are used in parallel, tower switching is automatically carried out, at least one tower is ensured to adsorb sulfides, the other adsorption tower with saturated adsorption is analyzed and regenerated under the action of high-temperature clean gas, and the high-temperature clean gas forms sulfur-rich concentrated gas V; and (4) the sulfur-rich concentrated gas enters a subsequent wet oxidation desulfurization unit to prepare sulfur.
Example 3
The total sulfur concentration in the blast furnace gas I is 150mg/m3The organic sulfur in the material flow I is converted into hydrogen sulfide to form a material flow II, and the conversion unit contains a calcium modified alumina catalyst; the material flow II enters a cooling unit to 60 ℃ to form a material flow III; enabling the material flow III to enter an adsorption unit formed by connecting at least two adsorption towers in parallel, removing hydrogen sulfide in blast furnace gas to form a clean gas material flow IV, wherein the total sulfur content of the material flow IV is 20.5mg/Nm3, and cobalt modified molecular sieve adsorption materials are contained in the adsorption towers; at least two adsorption towers in the adsorption unit are used in parallel, tower switching is automatically carried out, at least one tower is ensured to adsorb sulfides, the other adsorption tower with saturated adsorption is analyzed and regenerated under the action of high-temperature clean gas, and the high-temperature clean gas forms sulfur-rich concentrated gas V; and (4) the sulfur-rich concentrated gas enters a subsequent wet oxidation desulfurization unit to prepare sulfur.
Example 4
The total sulfur concentration in the blast furnace gas I is 100mg/m3The organic sulfur in the material flow I is converted into hydrogen sulfide to form a material flow II, and the conversion unit contains a titanium modified alumina catalyst; the material flow II enters a cooling unit to form a material flow III; enabling the material flow III to enter an adsorption unit formed by connecting at least two adsorption towers in parallel, removing hydrogen sulfide in blast furnace gas to form a clean gas material flow IV, wherein the total sulfur content of the material flow IV is 12.8mg/Nm3, and cobalt modified molecular sieve adsorption materials are contained in the adsorption towers; at least two adsorption towers in the adsorption unit are used in parallel, tower switching is automatically carried out, at least one tower is ensured to adsorb sulfides, the other adsorption tower with saturated adsorption is analyzed and regenerated under the action of high-temperature clean gas, and the high-temperature clean gas forms sulfur-rich concentrated gas V; and (4) the sulfur-rich concentrated gas enters a subsequent wet oxidation desulfurization unit to prepare sulfur.
Example 5
The total sulfur concentration in the blast furnace gas I is 300mg/m3The organic sulfur in the material flow I is converted into hydrogen sulfide to form a material flow II, and the conversion unit contains a potassium modified activated carbon catalyst; the material flow II enters a cooling unit to form a material flow III; the material flow III enters at least two adsorption towers which are connected in parallel to form adsorptionThe unit is used for removing hydrogen sulfide in blast furnace gas to form a clean gas stream IV, the total sulfur content of the stream IV is 23.7mg/Nm3, and an adsorption tower contains a copper modified molecular sieve adsorption material; at least two adsorption towers in the adsorption unit are used in parallel, tower switching is automatically carried out, at least one tower is ensured to adsorb sulfides, the other adsorption tower with saturated adsorption is analyzed and regenerated under the action of high-temperature clean gas, and the high-temperature clean gas forms sulfur-rich concentrated gas V; and (4) the sulfur-rich concentrated gas enters a subsequent wet oxidation desulfurization unit to prepare sulfur.
Example 6
The total sulfur concentration in the blast furnace gas I is 350mg/m3The organic sulfur in the material flow I is converted into hydrogen sulfide to form a material flow II, and the conversion unit contains a cobalt modified alumina catalyst; the material flow II enters a cooling unit to form a material flow III; the material flow III enters an adsorption unit formed by connecting at least two adsorption towers in parallel, hydrogen sulfide in blast furnace gas is removed, a clean gas material flow IV is formed, the total sulfur content of the material flow IV is 27.8mg/Nm3, and the adsorption towers contain a Y adsorption material modified by nickel modified molecular sieve adsorption material copper; at least two adsorption towers in the adsorption unit are used in parallel, tower switching is automatically carried out, at least one tower is ensured to adsorb sulfides, the other adsorption tower with saturated adsorption is analyzed and regenerated under the action of high-temperature clean gas, and the high-temperature clean gas forms sulfur-rich concentrated gas V; and (4) the sulfur-rich concentrated gas enters a subsequent wet oxidation desulfurization unit to prepare sulfur.
Example 7
The total sulfur concentration in the blast furnace gas I is 50mg/m3The organic sulfur in the material flow I is converted into hydrogen sulfide to form a material flow II, and the conversion unit contains an iron modified alumina catalyst; the material flow II enters a cooling unit to form a material flow III; the material flow III enters an adsorption unit formed by connecting at least two adsorption towers in parallel to remove hydrogen sulfide in blast furnace gas to form a clean gas material flow IV, the total sulfur content of the material flow IV is 8.2mg/Nm3, and the adsorption towers contain rare earth lanthanum modified mordenite microcrystalline materials and calcium modified MCM-41 adsorption materials; at least two adsorption towers are connected in parallel in the adsorption unit for use, the towers are automatically switched, at least one tower is ensured to adsorb sulfide, and the other tower is ensured to adsorb saturatedThe auxiliary tower is analyzed and regenerated under the action of high-temperature clean gas, and the high-temperature clean gas forms sulfur-rich concentrated gas V; and (4) the sulfur-rich concentrated gas enters a subsequent wet oxidation desulfurization unit to prepare sulfur.
The above description is only for the purpose of illustrating the preferred embodiments of the present invention and is not to be construed as limiting the invention, and any modifications, equivalents, improvements and the like that fall within the spirit and principle of the present invention are intended to be included therein.
Claims (10)
1. The method for fine desulfurization and purification of blast furnace gas is characterized by comprising the following steps:
s1, the blast furnace gas enters a conversion unit under positive pressure to convert organic sulfur in the blast furnace gas into hydrogen sulfide;
s2, cooling in a cooling unit;
and S3, enabling the cooled material flow to enter an adsorption unit filled with adsorption materials, and adsorbing and removing sulfides in the blast furnace gas to form clean gas.
2. The method for fine desulfurization and purification of blast furnace gas according to claim 1, characterized in that: one part of the clean gas enters a gas pipe network for output, and the other part of the clean gas enters a heating unit; introducing the heated high-temperature clean gas into an adsorption unit, carrying out desorption and regeneration on the adsorption material, and forming a sulfur-rich concentrated gas stream after regeneration; and (4) enabling the sulfur-rich concentrated gas stream to enter a wet oxidation desulfurization unit to prepare sulfur.
3. The method for fine desulfurization and purification of blast furnace gas according to claim 1, characterized in that: the conversion unit is a plurality of conversion towers which are used in parallel, catalysts are filled in the conversion towers, the conversion towers can be automatically switched, and one conversion tower is ensured to be reserved during operation.
4. The method for fine desulfurization and purification of blast furnace gas according to claim 1, characterized in that: the adsorption unit is a plurality of adsorption towers which are used in parallel, and all the adsorption towers can be automatically switched.
5. The fine blast furnace gas desulfurizing and purifying method as recited in claim 1, wherein the adsorbing material is at least one selected from the group consisting of X-type molecular sieve, Y-type molecular sieve, A-type molecular sieve, ZSM-type molecular sieve, mordenite, β zeolite, MCM-type molecular sieve, ZSM-5/mordenite, ZSM-5/β zeolite, ZSM-5/Y, MCM-22/mordenite and ZSM-5/mordenite/β zeolite.
6. The fine desulfurization and purification method for blast furnace gas according to claim 3, characterized in that: the catalyst is at least one of self-modified alumina, modified activated carbon or molecular sieve.
7. The method for fine desulfurization and purification of blast furnace gas according to claim 1, characterized in that: the organic sulfur is at least one of carbonyl sulfur, mercaptan, thioether, thiophene, methyl mercaptan or methyl thioether.
8. The method for fine desulfurization and purification of blast furnace gas according to claim 1, characterized in that: the total sulfur concentration of the blast furnace gas in the step S1 is 50-300 mg/m3And the total sulfur concentration of the clean gas in the step S3 is less than 30mg/Nm3。
9. A blast furnace gas fine desulfurization purification apparatus which is operated by the blast furnace gas fine desulfurization purification method according to any one of claims 1 to 7, characterized in that: the device comprises a conversion unit for carrying out organic sulfur catalytic conversion, a cooling unit and an adsorption unit for adsorbing hydrogen sulfide in blast furnace gas, which are connected in sequence, wherein the conversion unit is a plurality of conversion towers which are used in parallel, and the adsorption unit is a plurality of adsorption towers which are used in parallel.
10. The blast furnace gas fine desulfurization purification apparatus according to claim 9, characterized in that: the device also comprises a heating unit and a wet oxidation desulfurization unit, wherein the heating unit heats part of clean coal gas generated by the adsorption unit, the generated high-temperature clean coal gas is used for refluxing to the adsorption tower for desorption and regeneration, and the wet oxidation desulfurization unit is used for treating the sulfur-rich concentrated gas stream formed after regeneration to prepare sulfur.
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Cited By (9)
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| CN111321015A (en) * | 2020-03-12 | 2020-06-23 | 中国科学院过程工程研究所 | Blast furnace gas dry desulfurization and sulfur recycling device |
| CN111579708A (en) * | 2020-05-19 | 2020-08-25 | 福州大学 | Device and method for evaluating activity of desulfurization catalyst |
| CN111732975A (en) * | 2020-05-19 | 2020-10-02 | 福州大学 | Blast furnace gas partial deoxidation and desulfurization method and system |
| CN111732976A (en) * | 2020-05-19 | 2020-10-02 | 福州大学 | Blast furnace gas desulfurization method and system |
| CN111925833A (en) * | 2020-06-24 | 2020-11-13 | 福建省气柜设备安装有限公司 | Blast furnace gas composite adsorption fine desulfurization system |
| CN112195042A (en) * | 2020-08-19 | 2021-01-08 | 中冶南方都市环保工程技术股份有限公司 | Blast furnace gas desulfurization device and desulfurization method |
| CN112604648A (en) * | 2020-10-21 | 2021-04-06 | 中冶南方都市环保工程技术股份有限公司 | Method for synthesizing micro-mesoporous composite molecular sieve based on multiple molecular sieves |
| CN113046503A (en) * | 2021-02-05 | 2021-06-29 | 江苏垦乐节能环保科技有限公司 | Method for realizing blast furnace gas desulfurization and purification treatment system |
| CN113908797A (en) * | 2021-10-28 | 2022-01-11 | 中冶南方都市环保工程技术股份有限公司 | Adsorbent for blast furnace gas desulfurization and heavy metal capture, preparation and application thereof |
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